xref: /frameworks/base/docs/html/intl/ja/guide/topics/fundamentals.jd

page.title=éçºã®åºç¤
@jd:body

<div id="qv-wrapper">
<div id="qv">
<h2>主ãªã¯ã©ã¹</h2>
<ol>
<li>{@link android.app.Activity}</li>
<li>{@link android.app.Service}</li>
<li>{@link android.content.BroadcastReceiver}</li>
<li>{@link android.content.ContentProvider}</li>
<li>{@link android.content.Intent}</li>
</ol>

<h2>ãã®ãã­ã¥ã¡ã³ãã®å容</h2>
<ol>
<li><a href="#appcomp">ã¢ããªã±ã¼ã·ã§ã³ã®ã³ã³ãã¼ãã³ã</a>
  <ol>
    <li><a href="#actcomp">ã³ã³ãã¼ãã³ãã®ã¢ã¯ãã£ãå: ã¤ã³ãã³ã</a></li>
    <li><a href="#endcomp">ã³ã³ãã¼ãã³ãã®çµäº</a></li>
    <li><a href="#manfile">ãããã§ã¹ã ãã¡ã¤ã«</a></li>
    <li><a href="#ifilters">ã¤ã³ãã³ã ãã£ã«ã¿</a></li>
  </ol></li>
<li><a href="#acttask">ã¢ã¯ãã£ããã£ã¨ã¿ã¹ã¯</a>
  <ol>
    <li><a href="#afftask">親åæ§ã¨æ°ããã¿ã¹ã¯</a></li>
    <li><a href="#lmodes">èµ·åã¢ã¼ã</a></li>
    <li><a href="#clearstack">ã¹ã¿ãã¯ã®ã¯ãªã¢</a></li>
    <li><a href="#starttask">ã¿ã¹ã¯ã®éå§</a></li>
  </ol></li>
<li><a href="#procthread">ãã­ã»ã¹ã¨ã¹ã¬ãã</a>
  <ol>
    <li><a href="#procs">ãã­ã»ã¹</a></li>
    <li><a href="#threads">ã¹ã¬ãã</a></li>
    <li><a href="#rpc">ãªã¢ã¼ã ãã­ã·ã¼ã¸ã£ ã³ã¼ã«</a></li>
    <li><a href="#tsafe">ã¹ã¬ããã»ã¼ããªã¡ã½ãã</a></li>
  </ol></li>
<li><a href="#lcycles">ã³ã³ãã¼ãã³ãã®ã©ã¤ããµã¤ã¯ã«</a>
  <ol>
    <li><a href="#actlife">ã¢ã¯ãã£ããã£ã®ã©ã¤ããµã¤ã¯ã«</a></li>
    <li><a href="#servlife">ãµã¼ãã¹ã®ã©ã¤ããµã¤ã¯ã«</a></li>
    <li><a href="#broadlife">ãã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ãã®ã©ã¤ããµã¤ã¯ã«</a></li>
    <li><a href="#proclife">ãã­ã»ã¹ã¨ã©ã¤ããµã¤ã¯ã«</a></li>
  </ol></li>
</ol>
</div>
</div>

<p>
Android ã¢ããªã±ã¼ã·ã§ã³ã¯ãã¹ã¦ Java ãã­ã°ã©ãã³ã°è¨èªã§è¨è¿°ãã¾ããã³ã³ãã¤ã«æ¸ã¿ã® Java ã³ã¼ãï¼ããã³ãã®ã¢ããªã±ã¼ã·ã§ã³ã«å¿è¦ãªãã¹ã¦ã®ãã¼ã¿ããªã½ã¼ã¹ ãã¡ã¤ã«ï¼ã¯ã<a href="{@docRoot}tools/aapt.html"><code>aapt</code> ãã¼ã«</a>ã使ç¨ã㦠Android ããã±ã¼ã¸ã«ãã³ãã«ãã¾ããAndroid ããã±ã¼ã¸ã¯ãæ¡å¼µå­ã {@code .apk} ã®ã¢ã¼ã«ã¤ã ãã¡ã¤ã«ã§ãã<i></i>ã¦ã¼ã¶ã¼ã¯ããã®ãã¡ã¤ã«ãããã¤ã¹ã«ãã¦ã³ã­ã¼ããã¦å©ç¨ãã¾ããã¤ã¾ããAndroid ããã±ã¼ã¸ã¯ãã¢ããªã±ã¼ã·ã§ã³ãã¢ãã¤ã« ããã¤ã¹ã«éå¸ããã³ã¤ã³ã¹ãã¼ã«ããããã®åªä½ã¨ãã¦æ©è½ãã¾ãã1 ã¤ã® {@code .apk} ãã¡ã¤ã«ã«å«ã¾ãã¦ãããã¹ã¦ã®ã³ã¼ããã1 ã¤ã®ã¢ããªã±ã¼ã·ã§ã³ã¨è¦ãªããã¾ãã<i></i>
</p>

<p>
å Android ã¢ããªã±ã¼ã·ã§ã³ã¯ã以ä¸ã«ç¤ºããã¾ãã¾ãªæ¹æ³ã§ä»ã®ã¢ããªã±ã¼ã·ã§ã³ããéé¢ããã¦ãã¾ã:
</p>

<ul>
<li>ãã¹ã¦ã®ã¢ããªã±ã¼ã·ã§ã³ã¯ãããã©ã«ãã§ã¯ãã®ã¢ããªã±ã¼ã·ã§ã³åå¥ã® Linux ãã­ã»ã¹ã§å®è¡ããã¾ããAndroid ã¯ãã¢ããªã±ã¼ã·ã§ã³ ã³ã¼ãã®å®è¡ãå¿è¦ã«ãªã£ãã¨ãã«ãã­ã»ã¹ãéå§ãããã®å¿è¦ããªããªã£ã¦ä»ã®ã¢ããªã±ã¼ã·ã§ã³ããã·ã¹ãã  ãªã½ã¼ã¹ãè¦æ±ãããã¨ãã«ãã­ã»ã¹ãçµäºãã¾ãã</li>

<li>ãã­ã»ã¹ãã¨ã«å°ç¨ã® Java ä»®æ³ãã·ã³ï¼VMï¼ãå²ãå½ã¦ããããããã¢ããªã±ã¼ã·ã§ã³ ã³ã¼ãã¯ä»ã®ã¢ããªã±ã¼ã·ã§ã³ããéé¢ãããç¶æã§å®è¡ããã¾ãã</li>

<li>ããã©ã«ãã§ã¯ãã¢ããªã±ã¼ã·ã§ã³ãã¨ã«åºæã® Linux ã¦ã¼ã¶ã¼ ID ãå²ãå½ã¦ããã¾ãã権éã設å®ããã¦ãããããã¢ããªã±ã¼ã·ã§ã³ã®ãã¡ã¤ã«ã¯ãã®ã¦ã¼ã¶ã¼ããããèªè­ã§ããããã®ã¢ããªã±ã¼ã·ã§ã³èªä½ããã®ã¿å©ç¨ã§ãã¾ãããã ãããã¡ã¤ã«ãä»ã®ã¢ããªã±ã¼ã·ã§ã³ã«ã¨ã¯ã¹ãã¼ããããã¨ã¯å¯è½ã§ãã</li>
</ul>

<p>
2 ã¤ã®ã¢ããªã±ã¼ã·ã§ã³ã§åãã¦ã¼ã¶ã¼ ID ãå±æãããã¨ãã§ãã¾ãããã®å ´åã¯ãããããã®ã¢ããªã±ã¼ã·ã§ã³ã®ãã¡ã¤ã«ãç¸äºã«èªè­ã§ãã¾ããã·ã¹ãã  ãªã½ã¼ã¹ãç¯ç´ãããããåã ID ã®ã¢ããªã±ã¼ã·ã§ã³ã§åã VM ãå±æããåã Linux ãã­ã»ã¹ã§å®è¡ãããã¨ãå¯è½ã§ãã
</p>


<h2 id="appcomp">ã¢ããªã±ã¼ã·ã§ã³ã®ã³ã³ãã¼ãã³ã</h2>

<p>
Android ã®å¤§ããªç¹é·ã® 1 ã¤ã¯ã許å¯ããã¦ããã°ãããã¢ããªã±ã¼ã·ã§ã³ããå¥ã®ã¢ããªã±ã¼ã·ã§ã³ã®è¦ç´ ãå©ç¨ã§ããç¹ã§ãããã¨ãã°ãéçºä¸­ã®ã¢ããªã±ã¼ã·ã§ã³ã§ç»åã®ä¸è¦§ãã¹ã¯ã­ã¼ã«è¡¨ç¤ºãããå ´åãä»ã®ã¢ããªã±ã¼ã·ã§ã³ã§éçºæ¸ã¿ã®é©åãªã¹ã¯ã­ã¼ã©ãããããã®å©ç¨ã許å¯ããã¦ããã°ãç¬èªã«éçºããªãã¦ããã®ã¹ã¯ã­ã¼ã©ãå©ç¨ã§ãã¾ããã¢ããªã±ã¼ã·ã§ã³ã«ä»ã®ã¢ããªã±ã¼ã·ã§ã³ã®ã³ã¼ããçµã¿è¾¼ãã ãããªã³ã¯ã設å®ãããããå¿è¦ã¯ããã¾ãããå¿è¦ã«ãªã£ãæç¹ã§ãä»ã®ã¢ããªã±ã¼ã·ã§ã³ã®ä¸é¨åãéå§ããã ãã§ãã
</p>

<p>
ãã®ä»çµã¿ãæ©è½ããã«ã¯ãã¢ããªã±ã¼ã·ã§ã³ ãã­ã»ã¹ã®ä¸é¨åãå¿è¦ã«å¿ãã¦éå§ã§ãããã®é¨åã® Java ãªãã¸ã§ã¯ããã¤ã³ã¹ã¿ã³ã¹åã§ããªãã¦ã¯ãªãã¾ããããã®ãããAndroid ã¢ããªã±ã¼ã·ã§ã³ã«ã¯ãä»ã®ã·ã¹ãã ã§åä½ããã¢ããªã±ã¼ã·ã§ã³ã§ãã使ç¨ããããããªãã¢ããªã±ã¼ã·ã§ã³å¨ä½ã«ã¢ã¯ã»ã¹ããããã®åä¸ã®ã¨ã³ã㪠ãã¤ã³ãï¼ãã¨ãã° {@code main()} é¢æ°ï¼ã¯ããã¾ããã代ããã«ãã·ã¹ãã ãå¿è¦ã«å¿ãã¦ã¤ã³ã¹ã¿ã³ã¹åãã¦å®è¡ã§ããã³ã³ãã¼ãã³ãã§æ§æããã¾ãã<i></i>ã³ã³ãã¼ãã³ãã«ã¯ä»¥ä¸ã® 4 ã¤ã®ã¿ã¤ããããã¾ã:
</p>

<dl>

<dt><b>ã¢ã¯ãã£ããã£</b></dt>
<dd>ã¢ã¯ãã£ããã£ã¯ãã¦ã¼ã¶ã¼ã 1 ã¤ã®æä½ãé中çã«è¡ãããã®è¦è¦çãªã¦ã¼ã¶ã¼ ã¤ã³ã¿ã¼ãã§ã¼ã¹ã表ãã¾ãã<i></i>ãã¨ãã°ãã¦ã¼ã¶ã¼ãé¸æã§ããã¡ãã¥ã¼ ã¢ã¤ãã ã®ä¸è¦§ã表示ããã¢ã¯ãã£ããã£ããåçãã­ã£ãã·ã§ã³ä»ãã§è¡¨ç¤ºããã¢ã¯ãã£ããã£ãªã©ãèãããã¾ããSMS ã¢ããªã±ã¼ã·ã§ã³ãªããããã¢ã¯ãã£ããã£ã§ã¡ãã»ã¼ã¸ãéä¿¡ããé£çµ¡åã®ä¸è¦§ã表示ããå¥ã®ã¢ã¯ãã£ããã£ã§é¸æããé£çµ¡åã¸ã®ã¡ãã»ã¼ã¸ãå¥åãããã®ä»ã®ã¢ã¯ãã£ããã£ã§å¤ãã¡ãã»ã¼ã¸ãåç§ããã設å®ãå¤æ´ãããã§ãã¾ãããããã®ã¢ã¯ãã£ããã£ãçµã¿åããã¦å¨ä½ã¨ãã¦ã®ã¦ã¼ã¶ã¼ ã¤ã³ã¿ã¼ãã§ã¼ã¹ãå½¢æãã¾ãããããããã®ã¢ã¯ãã£ããã£ã¯ç¸äºã«ç¬ç«ãã¦ãã¾ããåã¢ã¯ãã£ããã£ã¯ã{@link android.app.Activity} åºæ¬ã¯ã©ã¹ã®ãµãã¯ã©ã¹ã¨ãã¦å®è£ããã¾ãã  

<p>
ã¢ããªã±ã¼ã·ã§ã³ã¯ã1 ã¤ã®ã¢ã¯ãã£ããã£ã§æ§æãããã¨ããä¸è¨ã®SMS ã¢ããªã±ã¼ã·ã§ã³ã®ããã«è¤æ°ã®ã¢ã¯ãã£ããã£ã§æ§æãããã¨ãã§ãã¾ããã©ã®ãããªã¢ã¯ãã£ããã£ãããã¤å¿è¦ã«ãªããã¯ãã¢ããªã±ã¼ã·ã§ã³ããã®è¨­è¨ã«å¿ãã¦ç°ãªãã¾ããé常ã¯ãã¢ã¯ãã£ããã£ã®ãã¡ã®ãããããæåã®ã¢ã¯ãã£ããã£ã¨ãã¦æå®ããã¦ã¼ã¶ã¼ãã¢ããªã±ã¼ã·ã§ã³ãèµ·åããã¨ãã«è¡¨ç¤ºãã¾ããããã¢ã¯ãã£ããã£ããå¥ã®ã¢ã¯ãã£ããã£ã«ç§»åããã«ã¯ãç¾å¨ã®ã¢ã¯ãã£ããã£ãã次ã®ã¢ã¯ãã£ããã£ãéå§ãã¾ãã  
</p>

<p>
åã¢ã¯ãã£ããã£ã«ã¯ãããã表示ããããã®ããã©ã«ãã®ã¦ã£ã³ãã¦ãå²ãå½ã¦ããã¾ããé常ã¯ã¦ã£ã³ãã¦ãç»é¢å¨ä½ã«è¡¨ç¤ºãã¾ãããç»é¢ããå°ããã¦ã£ã³ãã¦ãä»ã®ã¦ã£ã³ãã¦ã®åé¢ã«è¡¨ç¤ºãããã¨ãã§ãã¾ããã¢ã¯ãã£ããã£ã«ãæ°ããªã¦ã£ã³ãã¦ã追å ãããã¨ãå¯è½ã§ãããã¨ãã°ãã¢ã¯ãã£ããã£ã®é中ã§ã¦ã¼ã¶ã¼ã®å¿ç­ãè¦æ±ãããããã¢ãã ãã¤ã¢ã­ã°ã表示ããããã¦ã¼ã¶ã¼ãç»é¢ä¸ã®ç¹å®ã®ã¢ã¤ãã ãé¸æããã¨ãã«å¥ã¦ã£ã³ãã¦ã§éè¦ãªæå ±ã表示ãããã§ãã¾ãã
</p>

<p>
ã¦ã£ã³ãã¦ã®è¦è¦çãªã³ã³ãã³ãã¯ããã¥ã¼ï¼{@link android.view.View} åºæ¬ã¯ã©ã¹ã®æ´¾çãªãã¸ã§ã¯ãï¼ã®é層ã¨ãã¦æä¾ããã¾ããåãã¥ã¼ã¯ãã¦ã£ã³ãã¦åã®ç¹å®ã®ç©å½¢é åãå¶å¾¡ãã¾ãã親ãã¥ã¼ã¯ããã®å­ã¨ãªããã¥ã¼ã§æ§æããããããã®å­ãã¥ã¼ã®ã¬ã¤ã¢ã¦ãã決å®ãã¾ãããªã¼ã ãã¥ã¼ï¼é層ã®æä¸ä½ã«ä½ç½®ãããã¥ã¼ï¼ã¯ããã®ãã¥ã¼ãå¶å¾¡ããç©å½¢é åã«è¡¨ç¤ºããããã®é åã§ã®ã¦ã¼ã¶ã¼ã®ã¢ã¯ã·ã§ã³ã«å¯¾ãã¦å¿ç­ãã¾ããã¤ã¾ãããã¥ã¼ã¯ã¢ã¯ãã£ããã£ã¨ã¦ã¼ã¶ã¼ã対話ããå ´æã§ãããã¨ãã°ããã¥ã¼ã«å°ããªç»åã表示ããã¦ã¼ã¶ã¼ããã®ç»åãã¿ãããããä½ããã®ã¢ã¯ã·ã§ã³ãéå§ãããã¨ãã§ãã¾ããAndroid ã«ã¯ããã¿ã³ããã­ã¹ã ãã£ã¼ã«ããã¹ã¯ã­ã¼ã« ãã¼ãã¡ãã¥ã¼ ã¢ã¤ãã ããã§ãã¯ããã¯ã¹ãªã©ããã¾ãã¾ãªãã¥ã¼ããããããç¨æããã¦ãã¾ãã
</p>

<p>
ãã¥ã¼ã®é層ã¯ã<code>{@link android.app.Activity#setContentView Activity.setContentView()}</code> ã¡ã½ããã使ç¨ãã¦ã¢ã¯ãã£ããã£ã®ã¦ã£ã³ãã¦åã«éç½®ãã¾ããã³ã³ãã³ã ãã¥ã¼ã¯ãé層ã®ã«ã¼ãã¨ãªã View ãªãã¸ã§ã¯ãã§ã<i></i>ï¼ãã¥ã¼ããã³ãã®é層ã«ã¤ãã¦è©³ããã¯<a href="{@docRoot}guide/topics/ui/index.html">User Interface</a> ã®ãã­ã¥ã¡ã³ããã覧ãã ããï¼ã
</p>

<p><dt><b>ãµã¼ãã¹</b></dt>
<dd>ãµã¼ãã¹ã¯ãè¦è¦çãªã¦ã¼ã¶ã¼ ã¤ã³ã¿ã¼ãã§ã¼ã¹ãæãããããã¯ã°ã©ã¦ã³ãã«ããã¦æ確ãªçµäºæéããªãã§å®è¡ããã¾ãã<i></i>ãã¨ãã°ãã¦ã¼ã¶ã¼ãä»ã®æä½ããã¦ããé BGM ãåçãããµã¼ãã¹ããããã¯ã¼ã¯çµç±ã§ãã¼ã¿ããã§ãããããµã¼ãã¹ãä½ããè¨ç®ãã¦ãã®çµæãã¢ã¯ãã£ããã£ã«æä¾ãããµã¼ãã¹ãªã©ãèãããã¾ããåãµã¼ãã¹ã¯ã{@link android.app.Service} åºæ¬ã¯ã©ã¹ã®æ¡å¼µã§ãã

<p>
å¸åçãªä¾ã¨ãã¦ã¯ããã¬ã¤ãªã¹ãã®æ²ãåçããã¡ãã£ã¢ ãã¬ã¼ã¤ã¼ãæãããã¾ãããã¬ã¼ã¤ã¼ ã¢ããªã±ã¼ã·ã§ã³ã¯ãã¦ã¼ã¶ã¼ãæ²ãé¸ãã§åçããããã® 1 ã¤ä»¥ä¸ã®ã¢ã¯ãã£ããã£ã§æ§æãããã¨ãäºæ³ããã¾ãããã¦ã¼ã¶ã¼ã¯ãã¬ã¼ã¤ã¼ãé¢ãã¦å¥ã®æä½ã«ç§»ã£ãå¾ãæ²ãèãã¦ãããã¨èãããããã¨ãããæ²ã®åçèªä½ãã¢ã¯ãã£ããã£ã§å¦çããããã«ã¯ããã¾ãããé³æ¥½ã®åçãç¶ããã«ã¯ãã¡ãã£ã¢ ãã¬ã¼ã¤ã¼ ã¢ã¯ãã£ããã£ãããããã¯ã°ã©ã¦ã³ãã§å®è¡ãããµã¼ãã¹ãéå§ãã¾ããé³æ¥½åçãµã¼ãã¹ã¯ããããéå§ããã¢ã¯ãã£ããã£ãç»é¢ä¸ã«è¦ããªããªã£ãå¾ããã®ã¾ã¾å®è¡ããã¾ãã
</p>

<p> 
ã¾ããå®è¡ä¸­ã®ãµã¼ãã¹ã«æ¥ç¶ï¼ãã¤ã³ãï¼ãããã¨ãã§ãã¾ãï¼å®è¡ããã¦ããªãå ´åã¯ãã®ãµã¼ãã¹ãéå§ãããã¨ãå¯è½ã§ãï¼ãæ¥ç¶ä¸­ã¯ããµã¼ãã¹ãå¬éãã¦ããã¤ã³ã¿ã¼ãã§ã¼ã¹ã使ã£ã¦ãµã¼ãã¹ã¨å¯¾è©±ã§ãã¾ããé³æ¥½åçãµã¼ãã¹ã§ããã¯ããã®ã¤ã³ã¿ã¼ãã§ã¼ã¹ã使ã£ã¦ä¸æåæ­¢ãå·»ãæ»ããåæ­¢ãåçã®åéãªã©ã®æä½ãå®è¡ã§ããããã«ãã¾ãã
</p>

<p>
ã¢ã¯ãã£ããã£ãä»ã®ã³ã³ãã¼ãã³ãã¨åæ§ã«ããµã¼ãã¹ãã¢ããªã±ã¼ã·ã§ã³ ãã­ã»ã¹ã®ã¡ã¤ã³ ã¹ã¬ããã§å®è¡ãã¾ãããããã£ã¦ããµã¼ãã¹ã«ãã£ã¦ä»ã®ã³ã³ãã¼ãã³ããã¦ã¼ã¶ã¼ ã¤ã³ã¿ã¼ãã§ã¼ã¹ã®å®è¡ã妨ãããããã¨ã¯ãªããæéããããã¿ã¹ã¯ï¼ãã¨ãã°æ²ã®åçï¼ã«ã¤ãã¦ã¯ãé常ã¯å¥ã®ã¹ã¬ãããçæãã¦å¦çãã¾ãã詳ããã¯ã<a href="#procthread">ãã­ã»ã¹ã¨ã¹ã¬ãã</a>ãã覧ãã ããã
</p></dd>

<dt><b>ãã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ã</b></dt>
<dd>ãã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ãã¯ããã­ã¼ãã­ã£ã¹ãã®é£çµ¡ãåä¿¡ãã¦ããã«å¯¾å¦ããã ãã®ã³ã³ãã¼ãã³ãã§ãã<i></i>ãã­ã¼ãã­ã£ã¹ãã®å¤ããåãã¯ã·ã¹ãã  ã³ã¼ãã§ããã¨ãã°ã¿ã¤ã  ã¾ã¼ã³ãå¤æ´ããããã¨ãé»æ± ã®æ®éãå°ãªããªã£ããã¨ãåçãæ®å½±ããããã¨ãã¦ã¼ã¶ã¼ãè¨èªè¨­å®ãå¤æ´ãããã¨ãªã©ãé£çµ¡ããããã«ä½¿ç¨ãã¾ããã¢ããªã±ã¼ã·ã§ã³ã§ãããã¨ãã°ä½ããã®ãã¼ã¿ãããã¤ã¹ã«ãã¦ã³ã­ã¼ãããã¦å©ç¨ã§ããããã«ãªã£ããã¨ããä»ã®ã¢ããªã±ã¼ã·ã§ã³ã«ãã­ã¼ãã­ã£ã¹ãã§ç¥ããããã¨ãã§ãã¾ãã

<p>
ã¢ããªã±ã¼ã·ã§ã³ã§ã¯ãéè¦ã¨æããããã¹ã¦ã®é£çµ¡ã«å¿ç­ã§ããããããã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ããããã¤ã§ã設å®ã§ãã¾ãããã¹ã¦ã®ã¬ã·ã¼ãã¯ã{@link android.content.BroadcastReceiver} åºæ¬ã¯ã©ã¹ã®æ¡å¼µã§ãã
</p>

<p>
ãã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ããã¦ã¼ã¶ã¼ ã¤ã³ã¿ã¼ãã§ã¼ã¹ã表示ãããã¨ã¯ããã¾ããããã ããåä¿¡ããæå ±ã¸ã®å¿ç­ã¨ãã¦ã¢ã¯ãã£ããã£ãéå§ãããã{@link android.app.NotificationManager} ã使ç¨ãã¦ã¦ã¼ã¶ã¼ã«ã¢ã©ã¼ããéä¿¡ããããããã¨ã¯ããã¾ããéç¥ã®éã«ã¯ãããã¯ã©ã¤ããç¹æ»ãããããã¤ãã¬ã¼ã·ã§ã³ãèµ·åãããé³ãé³´ãããªã©ããã¾ãã¾ãªæ¹æ³ã§ã¦ã¼ã¶ã¼ã®æ³¨æãåèµ·ã§ãã¾ããé常ã¯ãã¹ãã¼ã¿ã¹ ãã¼ã«æ°¸ç¶ã¢ã¤ã³ã³ã表示ããã¦ã¼ã¶ã¼ããããéãã¦ã¡ãã»ã¼ã¸ãåå¾ã§ããããã«ãã¾ãã 
</p></dd>

<dt><b>ã³ã³ãã³ã ãã­ãã¤ã</b></dt>
<dd>ã³ã³ãã³ã ãã­ãã¤ãã¯ãã¢ããªã±ã¼ã·ã§ã³ã®ãã¼ã¿ãä»ã®ã¢ããªã±ã¼ã·ã§ã³ã§ãå©ç¨ã§ããããã«ãã¾ãã<i></i>ãã¼ã¿ã¯ããã¡ã¤ã« ã·ã¹ãã ã SQLite ãã¼ã¿ãã¼ã¹ãªã©ãä¸è¬ã«å©ç¨ã§ããæ¹æ³ã§æ ¼ç´ããã¦ããã°ä½¿ç¨ã§ãã¾ããã³ã³ãã³ã ãã­ãã¤ãã¯ã{@link android.content.ContentProvider} åºæ¬ã¯ã©ã¹ã®æ¡å¼µã§ãããã­ãã¤ããå¶å¾¡ããåã®ãã¼ã¿ããä»ã®ã¢ããªã±ã¼ã·ã§ã³ããåå¾ããã³æ ¼ç´ããããã®æ¨æºã¡ã½ãã ã»ãããå®è£ãã¦ãã¾ãããã ãããããã®ã¡ã½ãããã¢ããªã±ã¼ã·ã§ã³ããç´æ¥å¼ã³åºããã¨ã¯ã§ãã¾ããã代ããã«ã{@link android.content.ContentResolver} ãªãã¸ã§ã¯ãã®ã¡ã½ãããå¼ã³åºãã¾ããContentResolver ã¯ããã¹ã¦ã®ãã­ãã¤ãã¨éä¿¡ã§ãããã­ãã¤ãã¨é£æºãã¦é¢ä¿ã®ãããã¹ã¦ã®ãã­ã»ã¹ééä¿¡ã管çãã¾ãã 

<p>
ã³ã³ãã³ã ãã­ãã¤ãã®ä½¿ç¨æ¹æ³ã«ã¤ãã¦è©³ããã¯ã<a href="{@docRoot}guide/topics/providers/content-providers.html">Content Providers</a>ã®ãã­ã¥ã¡ã³ããã覧ãã ããã
</p></dd>

</dl>

<p>
Android ã§ã¯ãç¹å®ã®ã³ã³ãã¼ãã³ãã§å¦çãã¹ããªã¯ã¨ã¹ããããã¨ããã®ã³ã³ãã¼ãã³ãã®ã¢ããªã±ã¼ã·ã§ã³ ãã­ã»ã¹ãå®è¡ä¸­ãã©ããã確èªï¼å¿è¦ã«å¿ãã¦ãã­ã»ã¹ãéå§ï¼ãããã®ã³ã³ãã¼ãã³ãã®é©åãªã¤ã³ã¹ã¿ã³ã¹ãå©ç¨å¯è½ãã©ããã確èªï¼å¿è¦ã«å¿ãã¦ã¤ã³ã¹ã¿ã³ã¹ãä½æï¼ãã¾ãã  
</p>


<h3 id="actcomp">ã³ã³ãã¼ãã³ãã®ã¢ã¯ãã£ãå: ã¤ã³ãã³ã</h3> 

<p>
ã³ã³ãã³ã ãã­ãã¤ãã¯ãContentResolver ããã®ãªã¯ã¨ã¹ãã®å¯¾è±¡ã«ãªãã¨ã¢ã¯ãã£ãåããã¾ãããã以å¤ã® 3 ã¤ã®ã³ã³ãã¼ãã³ãï¼ã¢ã¯ãã£ããã£ããµã¼ãã¹ããã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ãï¼ã¯ãã¤ã³ãã³ãã¨å¼ã°ããéåæã¡ãã»ã¼ã¸ã«ãã£ã¦ã¢ã¯ãã£ãåããã¾ãã<i></i>ã¤ã³ãã³ãã¯ãã¡ãã»ã¼ã¸ã®ã³ã³ãã³ããä¿æãã {@link android.content.Intent} ãªãã¸ã§ã¯ãã§ããã¢ã¯ãã£ããã£ããµã¼ãã¹ã®å ´åã® Intent ãªãã¸ã§ã¯ãã®ä¸»ãªå½¹å²ã¯ããªã¯ã¨ã¹ãããã¦ããã¢ã¯ã·ã§ã³ãæåãããã®å¯¾è±¡ã¨ãªããã¼ã¿ã® URI ãæå®ãããã¨ã§ãããã¨ãã°ãã¦ã¼ã¶ã¼ã«ç»åã表示ããããã®ãªã¯ã¨ã¹ãããã¦ã¼ã¶ã¼ã«ãã­ã¹ããç·¨éããããªã¯ã¨ã¹ããã¢ã¯ãã£ããã£ã«ä¼éã§ãã¾ãããã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ãã®å ´åã¯ãIntent ãªãã¸ã§ã¯ããããããéç¥ãè¡ãã¢ã¯ã·ã§ã³ãæåãã¾ãããã¨ãã°ãã«ã¡ã©ã®ãã¿ã³ãæ¼ããããã¨ããé¢ä¿ã®ãããã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ãã«éç¥ã§ãã¾ãã
</p>

<p>
以ä¸ã«ç¤ºãããã«ãã³ã³ãã¼ãã³ãã®ã¿ã¤ããã¨ã«å¥ãã®ã¢ã¯ãã£ãåã¡ã½ãããç¨æããã¦ãã¾ã: 
</p>

<ul>

<li>ã¢ã¯ãã£ããã£ãèµ·åããï¼ã¾ãã¯ä½ãæ°ããå¦çãå®è¡ãããï¼ã«ã¯ãIntent ãªãã¸ã§ã¯ãã <code>{@link android.content.Context#startActivity 
Context.startActivity()}</code> ã¾ã㯠<code>{@link 
android.app.Activity#startActivityForResult 
Activity.startActivityForResult()}</code> ã«æ¸¡ãã¾ããå¿ç­ã¢ã¯ãã£ããã£ã§ <code>{@link android.app.Activity#getIntent getIntent()}</code> ã¡ã½ãããå¼ã³åºãã¨ãæåã«ãã®ã¢ã¯ãã£ããã£ãèµ·åãããã¨ãã®ã¤ã³ãã³ãã®å容ã確èªã§ãã¾ããAndroid ã«ãã£ã¦ã¢ã¯ãã£ããã£ã® <code>{@link 
android.app.Activity#onNewIntent onNewIntent()}</code> ã¡ã½ãããå¼ã³åºãããã¢ã¯ãã£ããã£ãå¾ç¶ã®ã¤ã³ãã³ãã«æ¸¡ããã¾ãã

<p>
å¤ãã®å ´åãã¢ã¯ãã£ããã£ãã次ã®ã¢ã¯ãã£ããã£ãéå§ãã¾ããéå§ããã¢ã¯ãã£ããã£ããçµæãè¿ãããå ´åã¯ã{@code startActivity()} ã§ã¯ãªã {@code startActivityForResult()} ãå¼ã³åºãã¾ãããã¨ãã°ãã¦ã¼ã¶ã¼ã«åçãé¸æãããã¢ã¯ãã£ããã£ãéå§ããå ´åã¯ãã¦ã¼ã¶ã¼ã«ãã£ã¦é¸æãããåçãè¿ãããããããã¾ãããçµæã¯ãå¼ã³åºãå´ã®ã¢ã¯ãã£ããã£ã® <code>{@link android.app.Activity#onActivityResult 
onActivityResult()}</code> ã¡ã½ããã«æ¸¡ãã Intent ãªãã¸ã§ã¯ãã§è¿ããã¾ãã
</p>
</li>

<li><p>ãµã¼ãã¹ãéå§ããï¼ã¾ãã¯å®è¡ä¸­ã®ãµã¼ãã¹ã«æ°ããæ示ãä¸ããï¼ã«ã¯ã<code>{@link 
android.content.Context#startService Context.startService()}</code> ã« Intent ãªãã¸ã§ã¯ãã渡ãã¾ããAndroid ã«ããããµã¼ãã¹ã® <code>{@link android.app.Service#onStart 
onStart()}</code> ã¡ã½ãããå¼ã³åºãã㦠Intent ãªãã¸ã§ã¯ãã渡ããã¾ãã</p>

<p>
åæ§ã«ãã¤ã³ãã³ãã <code>{@link 
android.content.Context#bindService Context.bindService()}</code> ã«æ¸¡ãã¨ãå¼ã³åºãå´ã®ã³ã³ãã¼ãã³ãã¨å¯¾è±¡ã¨ãªããµã¼ãã¹ã®éã®ç¶ç¶ä¸­ã®æ¥ç¶ã確ç«ã§ãã¾ãããµã¼ãã¹ã¯ã<code>{@link android.app.Service#onBind onBind()}</code> å¼ã³åºã㧠Intent ãªãã¸ã§ã¯ããåãåãã¾ãï¼ãµã¼ãã¹ãã¾ã éå§ããã¦ããªãå ´åã¯ãå¿è¦ã«å¿ã㦠{@code bindService()} ã§éå§ã§ãã¾ãï¼ããã¨ãã°ãä¸ã§ä¾ã«æããé³æ¥½åçãµã¼ãã¹ã¨ã®æ¥ç¶ã確ç«ããã¢ã¯ãã£ããã£ã使ç¨ãã¦ãã¦ã¼ã¶ã¼ãåçãæä½ããããã®æ段ï¼ã¦ã¼ã¶ã¼ ã¤ã³ã¿ã¼ãã§ã¼ã¹ï¼ãæä¾ã§ãã¾ããã¢ã¯ãã£ããã£ã§ {@code bindService()} ãå¼ã³åºãã¦æ¥ç¶ã確ç«ãã¦ããããµã¼ãã¹ã«å®ç¾©ããã¦ããã¡ã½ãããå¼ã³åºãã¦åçãæä½ãã¾ãã
</p>

<p>
ãµã¼ãã¹ã®ãã¤ã³ãã«ã¤ãã¦ã¯ãå¾ã»ã©<a href="#rpc">ãªã¢ã¼ã ãã­ã·ã¼ã¸ã£ ã³ã¼ã«</a>ã®ã»ã¯ã·ã§ã³ã§è©³ãã説æãã¾ãã
</p>
</li>

<li><p>ã¢ããªã±ã¼ã·ã§ã³ã§ãã­ã¼ãã­ã£ã¹ããéå§ããã«ã¯ã<code>{@link 
android.content.Context#sendBroadcast(Intent) Context.sendBroadcast()}</code>ã<code>{@link android.content.Context#sendOrderedBroadcast(Intent, String) 
Context.sendOrderedBroadcast()}</code>ã<code>{@link 
android.content.Context#sendStickyBroadcast Context.sendStickyBroadcast()}</code> ãªã©ã®ã¡ã½ããã®ããããã®ããªã¨ã¼ã·ã§ã³ã« Intent ãªãã¸ã§ã¯ãã渡ãã¾ããAndroid ã«ãã£ã¦ <code>{@link 
android.content.BroadcastReceiver#onReceive onReceive()}</code> ã¡ã½ãããå¼ã³åºãããé¢ä¿ã®ãããã¹ã¦ã®ãã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ãã«ã¤ã³ãã³ããéä¿¡ããã¾ãã</p></li>

</ul>

<p>
ã¤ã³ãã³ã ã¡ãã»ã¼ã¸ã«ã¤ãã¦è©³ããã¯ã<a href="{@docRoot}guide/components/intents-filters.html">Intents and Intent Filters</a> ãã覧ãã ããã
</p>


<h3 id="endcomp">ã³ã³ãã¼ãã³ãã®çµäº</h3>

<p>
ã³ã³ãã³ã ãã­ãã¤ãã¯ãContentResolver ããã®ãªã¯ã¨ã¹ãã«å¿ç­ãã¦ããéã®ã¿ã¢ã¯ãã£ãã«ãªãã¾ãããã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ãã¯ããã­ã¼ãã­ã£ã¹ã ã¡ãã»ã¼ã¸ã«å¿ç­ãã¦ããéã®ã¿ã¢ã¯ãã£ãã«ãªãã¾ããã¤ã¾ãããããã®ã³ã³ãã¼ãã³ããæ示çã«çµäºãããå¿è¦ã¯ããã¾ããã
</p>

<p>
ä¸æ¹ãã¢ã¯ãã£ããã£ã¯ã¦ã¼ã¶ã¼ ã¤ã³ã¿ã¼ãã§ã¼ã¹ãæä¾ãã¾ããé·ãæéãããã¦ã¦ã¼ã¶ã¼ã¨ä¼è©±ããããã®ãã®ã§ãããå¾æ©ç¶æã®éããä¼è©±ãç¶ãã¦ããéãã¯ã¢ã¯ãã£ããªã¾ã¾ã«ãªã£ã¦ããå¯è½æ§ãããã¾ããåæ§ã«ããµã¼ãã¹ãé·ãéå®è¡ãããã¾ã¾ã«ãªãå¯è½æ§ãããã¾ããAndroid ã«ã¯ãã¢ã¯ãã£ããã£ã¨ãµã¼ãã¹ã以ä¸ã®ãããªè¦åçãªæ¹æ³ã§çµäºãããããã®ã¡ã½ãããç¨æããã¦ãã¾ã:
</p>

<ul>
<li>ã¢ã¯ãã£ããã£ãçµäºãããã«ã¯ããã® <code>{@link android.app.Activity#finish finish()}</code> ã¡ã½ãããå¼ã³åºãã¾ããããã¢ã¯ãã£ããã£ãã {@code startActivityForResult()} ã§éå§ããå¥ã®ã¢ã¯ãã£ããã£ã¯ã<code>{@link android.app.Activity#finishActivity finishActivity()}</code> ãå¼ã³åºãã¦çµäºããããã¨ãã§ãã¾ãã</li>

<li>ãµã¼ãã¹ã¯ããã® <code>{@link android.app.Service#stopSelf stopSelf()}</code> ã¡ã½ãããå¼ã³åºããã<code>{@link android.content.Context#stopService Context.stopService()}</code> ãå¼ã³åºããã¨ã§åæ­¢ã§ãã¾ãã</li>
</ul>

<p>
ã³ã³ãã¼ãã³ãããæ¢ã«å©ç¨ããã¦ããªãå ´åããAndroid ãããã¢ã¯ãã£ããªä»ã®ã³ã³ãã¼ãã³ãã«ã¡ã¢ãªãå²ãå½ã¦ãå¿è¦ãããå ´åã¯ãã·ã¹ãã ãã³ã³ãã¼ãã³ããçµäºããããã¨ãããã¾ãããã®ãããªç¶æ³ããã³ãã®å½±é¿ã«ã¤ãã¦ã¯ã<a href="#lcycles">ã³ã³ãã¼ãã³ãã®ã©ã¤ããµã¤ã¯ã«</a>ã§è©³ãã説æãã¾ãã
</p>


<h3 id="manfile">ãããã§ã¹ã ãã¡ã¤ã«</h3>

<p>
ã¢ããªã±ã¼ã·ã§ã³ ã³ã³ãã¼ãã³ããéå§ããã«ã¯ãAndroid ããã®ã³ã³ãã¼ãã³ãã®å­å¨ãèªè­ãã¦ããå¿è¦ãããã¾ããã¢ããªã±ã¼ã·ã§ã³ã®ã³ã³ãã¼ãã³ãã¯ããããã§ã¹ã ãã¡ã¤ã«ã§å®£è¨ãã¾ãããã®ãã¡ã¤ã«ã¯ãã¢ããªã±ã¼ã·ã§ã³ã®ã³ã¼ãããã¡ã¤ã«ããªã½ã¼ã¹ãªã©ã¨ã¨ãã« Android ããã±ã¼ã¸ï¼{@code .apk} ãã¡ã¤ã«ï¼ã«ãã³ãã«ããã¾ãã  
</p>

<p>
ãããã§ã¹ãã¯æ§é åããã XML ãã¡ã¤ã«ã§ãã©ã®ã¢ããªã±ã¼ã·ã§ã³ã§ã常㫠AndroidManifest.xml ã¨ããååã«ãªãã¾ããã¢ããªã±ã¼ã·ã§ã³ ã³ã³ãã¼ãã³ãã®å®£è¨ä»¥å¤ã«ããã¢ããªã±ã¼ã·ã§ã³ããªã³ã¯ãããå¿è¦ã®ããã©ã¤ãã©ãªï¼ããã©ã«ãã® Android ã©ã¤ãã©ãªãé¤ãï¼ã®æå®ããã¢ããªã±ã¼ã·ã§ã³ã«ä»ä¸ãããã¹ã権éã®æå®ãªã©ã«ã使ç¨ãã¾ãã
</p>

<p>
ãããããããã§ã¹ãã®æãéè¦ãªå½¹å²ã¯ãã¢ããªã±ã¼ã·ã§ã³ã®ã³ã³ãã¼ãã³ãã«é¢ããæå ±ã Android ã«æä¾ãããã¨ã§ãããã¨ãã°ãã¢ã¯ãã£ããã£ã次ã®ããã«å®£è¨ã§ãã¾ã:
</p>

<pre>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;manifest . . . &gt;
    &lt;application . . . &gt;
        &lt;activity android:name="com.example.project.FreneticActivity"
                  android:icon="@drawable/small_pic.png"
                  android:label="@string/freneticLabel" 
                  . . .  &gt;
        &lt;/activity&gt;
        . . .
    &lt;/application&gt;
&lt;/manifest&gt;</pre>

<p>
<code><a href="{@docRoot}guide/topics/manifest/activity-element.html">&lt;activity&gt;</a></code> è¦ç´ ã® {@code name} å±æ§ã¯ããã®ã¢ã¯ãã£ããã£ãå®è£ãã {@link android.app.Activity} ãµãã¯ã©ã¹ãæåãã¾ãã{@code icon} ããã³ {@code label} å±æ§ã«ã¯ãã¦ã¼ã¶ã¼ã«å¯¾ãã¦è¡¨ç¤ºããã¢ã¤ã³ã³ãã©ãã«ãä¿æããã¦ãããªã½ã¼ã¹ ãã¡ã¤ã«ãæå®ãã¾ãã
</p>

<p>
ãã®ä»ã®ã³ã³ãã¼ãã³ããããµã¼ãã¹ã¯ <code><a href="{@docRoot}guide/topics/manifest/service-element.html">&lt;service&gt;</a></code> è¦ç´ ããã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ã㯠<code><a href="{@docRoot}guide/topics/manifest/receiver-element.html">&lt;receiver&gt;</a></code> è¦ç´ ãã³ã³ãã³ã ãã­ãã¤ã㯠<code><a href="{@docRoot}guide/topics/manifest/provider-element.html">&lt;provider&gt;</a></code> è¦ç´ ã使ç¨ãã¦åããããªæ¹æ³ã§å®£è¨ãã¾ãããããã§ã¹ãã«å®£è¨ããã¦ããªãã¢ã¯ãã£ããã£ããµã¼ãã¹ãããã³ã³ã³ãã³ã ãã­ãã¤ãã¯ãã·ã¹ãã ããèªè­ã§ããªãããå®è¡ããããã¨ã¯ããã¾ããããã ãããã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ãã®å ´åã¯ããããã§ã¹ãã§å®£è¨ããæ¹æ³ã¨ãã³ã¼ãå㧠{@link android.content.BroadcastReceiver} ãªãã¸ã§ã¯ãã¨ãã¦åçã«ä½æãã<code>{@link android.content.Context#registerReceiver Context.registerReceiver()}</code> ãå¼ã³åºãã¦ã·ã¹ãã ã«ç»é²ããæ¹æ³ãããã¾ãã
</p>

<p>
ãããã§ã¹ã ãã¡ã¤ã«ã®ä½ææ¹æ³ã«ã¤ãã¦è©³ããã¯ã<a href="{@docRoot}guide/topics/manifest/manifest-intro.html">The AndroidManifest.xml File</a>ãã覧ãã ããã
</p>


<h3 id="ifilters">ã¤ã³ãã³ã ãã£ã«ã¿</h3>

<p>
Intent ãªãã¸ã§ã¯ãã§ã¯ã対象ã¨ããã³ã³ãã¼ãã³ããæ示çã«æåã§ãã¾ããæ示çã«æåããã¦ããå ´åãAndroid ã¯ãããã§ã¹ã ãã¡ã¤ã«åã®å®£è¨ã«åºã¥ãã¦ã³ã³ãã¼ãã³ããç¹å®ãã¦ã¢ã¯ãã£ãã«ãã¾ããä¸æ¹ãæ示çã«æåããã¦ããªãå ´åã¯ããã®ã¤ã³ãã³ãã«å¿ç­ããä¸ã§æé©ãªã³ã³ãã¼ãã³ããé¸æããã¾ããæ¹æ³ã¨ãã¦ã¯ãIntent ãªãã¸ã§ã¯ããããã®å¯¾è±¡ã¨ãªãããã³ã³ãã¼ãã³ãã®ã¤ã³ãã³ã ãã£ã«ã¿ã¨ç§åãã¾ãã<i></i>ã³ã³ãã¼ãã³ãã®ã¤ã³ãã³ã ãã£ã«ã¿ã¯ããã®ã³ã³ãã¼ãã³ãã§å¦çã§ããã¤ã³ãã³ãã®ç¨®é¡ã示ãã¾ãããããã³ã³ãã¼ãã³ãã«é¢ããéè¦ãªæ報㮠1 ã¤ãªã®ã§ããããã§ã¹ã ãã¡ã¤ã«ã§å®£è¨ãã¾ãã次ã«ãä¸ã«ç¤ºããä¾ãæ¡å¼µã㦠2 ã¤ã®ã¤ã³ãã³ã ãã£ã«ã¿ã追å ããã¢ã¯ãã£ããã£ã示ãã¾ã:
</p>

<pre>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;manifest . . . &gt;
    &lt;application . . . &gt;
        &lt;activity android:name="com.example.project.FreneticActivity"
                  android:icon="@drawable/small_pic.png"
                  android:label="@string/freneticLabel" 
                  . . .  &gt;
            &lt;intent-filter . . . &gt;
                &lt;action android:name="android.intent.action.MAIN" /&gt;
                &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
            &lt;/intent-filter&gt;
            &lt;intent-filter . . . &gt;
                &lt;action android:name="com.example.project.BOUNCE" /&gt;
                &lt;data android:mimeType="image/jpeg" /&gt;
                &lt;category android:name="android.intent.category.DEFAULT" /&gt;
            &lt;/intent-filter&gt;
        &lt;/activity&gt;
        . . .
    &lt;/application&gt;
&lt;/manifest&gt;</pre>

<p>
ãã®ä¾ã® 1 ã¤ç®ã®ãã£ã«ã¿ã¯ãã¢ã¯ã·ã§ã³ã{@code android.intent.action.MAIN}ãã¨ã«ãã´ãªã{@code android.intent.category.LAUNCHER}ããçµã¿åãããä¸è¬çãªãã£ã«ã¿ã§ãããã®ãã£ã«ã¿ã¯ãã¢ããªã±ã¼ã·ã§ã³ ã©ã³ãã£ï¼ã¦ã¼ã¶ã¼ãããã¤ã¹ä¸ã§èµ·åã§ããã¢ããªã±ã¼ã·ã§ã³ãä¸è¦§è¡¨ç¤ºããç»é¢ï¼ã«ããã®ã¢ã¯ãã£ããã£ã表示ããå¿è¦ããããã¨ã示ãã¦ãã¾ããã¤ã¾ãããã®ã¢ã¯ãã£ããã£ã¯ã¢ããªã±ã¼ã·ã§ã³ã¸ã®ã¨ã³ã㪠ãã¤ã³ãã¨ãã¦æ©è½ããã¦ã¼ã¶ã¼ãã©ã³ãã£ã§ãã®ã¢ããªã±ã¼ã·ã§ã³ãé¸æããã¨ãã«æåã«è¡¨ç¤ºãããã¨ãããã¨ã§ãã
</p>

<p>
2 ã¤ç®ã®ãã£ã«ã¿ã§ã¯ãã¢ã¯ãã£ããã£ãç¹å®ã®ã¿ã¤ãã®ãã¼ã¿ã«å¯¾ãã¦å®è¡ã§ããã¢ã¯ã·ã§ã³ã宣è¨ãã¦ãã¾ãã
</p>

<p>
ã³ã³ãã¼ãã³ãã«ã¯ã¤ã³ãã³ã ãã£ã«ã¿ãããã¤ã§ãæå®ã§ããããããã®ãã£ã«ã¿ã§å¥ãã®æ©è½ã宣è¨ã§ãã¾ãããã£ã«ã¿ã 1 ã¤ãæå®ããã¦ããªãã³ã³ãã¼ãã³ãã¯ããã®ã³ã³ãã¼ãã³ãã対象ã¨ãã¦æ示çã«æåããã¦ããã¤ã³ãã³ãã§ã®ã¿ã¢ã¯ãã£ãã«ã§ãã¾ãã
</p>

<p>
ã³ã¼ãåã§ä½æãã¦ç»é²ãããã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ãã®å ´åãã¤ã³ãã³ã ãã£ã«ã¿ã¯ {@link android.content.IntentFilter} ãªãã¸ã§ã¯ãã¨ãã¦ç´æ¥ã¤ã³ã¹ã¿ã³ã¹åããã¾ãããã以å¤ã®å¨ã¦ã®ãã£ã«ã¿ã¯ããããã§ã¹ãã§è¨­å®ãã¾ãã
</p>

<p>
ã¤ã³ãã³ã ãã£ã«ã¿ã«ã¤ãã¦è©³ããã¯ã<a href="{@docRoot}guide/components/intents-filters.html">Intents and Intent Filters</a> ãã覧ãã ããã
</p>


<h2 id="acttask">ã¢ã¯ãã£ããã£ã¨ã¿ã¹ã¯</h2>

<p>
æ¢ã«èª¬æããããã«ãããã¢ã¯ãã£ããã£ããå¥ã®ã¢ã¯ãã£ããã£ãéå§ãããã¨ãã§ãã¾ããããã«ã¯ãå¥ã®ã¢ããªã±ã¼ã·ã§ã³ã§å®ç¾©ããã¦ããã¢ã¯ãã£ããã£ãå«ã¾ãã¾ãããã¨ãã°ãã¦ã¼ã¶ã¼ã«ç¹å®ã®å ´æã®å°å³ã表示ããã¨ãã¾ãããã®ããã®ã¢ã¯ãã£ããã£ã¯æ¢ã«å­å¨ãã¦ããã®ã§ãç¾å¨ã®ã¢ã¯ãã£ããã£ã§å¿è¦ãªæå ±ã Intent ãªãã¸ã§ã¯ãã«æ ¼ç´ã㦠{@code startActivity()} ã«æ¸¡ãã ãã§ãããã ãã¥ã¼ã¢ã«å°å³ã表示ã§ãã¾ããã¦ã¼ã¶ã¼ã [æ»ã] ã­ã¼ãæ¼ãã¨ãç»é¢ã«åã®ã¢ã¯ãã£ããã£ãå表示ããã¾ãã
</p>

<p>
ãã®å ´åãããã ãã¥ã¼ã¢ã¯å¥ã®ã¢ããªã±ã¼ã·ã§ã³ã§å®ç¾©ããã¦ããããã®ã¢ããªã±ã¼ã·ã§ã³ã®ãã­ã»ã¹ã§å®è¡ããã¦ãã¾ãããã¦ã¼ã¶ã¼ã«ã¨ã£ã¦ã¯ããã ãã¥ã¼ã¢ãåã®ã¢ããªã±ã¼ã·ã§ã³ã®ä¸é¨ã§ãããã®ããã«æãããã¾ããAndroid ã§ã¯ã両æ¹ã®ã¢ã¯ãã£ããã£ãåãã¿ã¹ã¯ã«çµã¿è¾¼ããã¨ã§ããã®ãããªã¦ã¼ã¶ã¼ ã¨ã¯ã¹ããªã¨ã³ã¹ãå®ç¾ã§ãã¾ãã<i></i>ç°¡åã«è¨ãã°ãã¦ã¼ã¶ã¼ã 1 ã¤ã®ãã¢ããªã±ã¼ã·ã§ã³ãã¨æãããã®ãã¿ã¹ã¯ã§ããé¢é£ããã¢ã¯ãã£ããã£ãã¹ã¿ãã¯ã«ã¾ã¨ãããã®ãã¿ã¹ã¯ã§ããã¹ã¿ãã¯åã®ã«ã¼ã ã¢ã¯ãã£ããã£ã¯ãã¿ã¹ã¯ãéå§ããã¢ã¯ãã£ããã£ã§ããé常ã§ããã°ãã¦ã¼ã¶ã¼ãã¢ããªã±ã¼ã·ã§ã³ ã©ã³ãã£ã§é¸æããã¢ã¯ãã£ããã£ãããã«ç¸å½ãã¾ããã¹ã¿ãã¯ã®æä¸ä½ã«ããã¢ã¯ãã£ããã£ã¯ãã¦ã¼ã¶ã¼ã®ã¢ã¯ã·ã§ã³ã®ç¦ç¹ã¨ãªã£ã¦ããå®è¡ä¸­ã®ã¢ã¯ãã£ããã£ã§ããããã¢ã¯ãã£ããã£ããå¥ã®ã¢ã¯ãã£ããã£ãéå§ããã¨ããã®ã¢ã¯ãã£ããã£ãæ°ãã«ã¹ã¿ãã¯ã«ããã·ã¥ããã¦å®è¡ä¸­ã®ã¢ã¯ãã£ããã£ã«ãªãã¾ãã1 ã¤åã®ã¢ã¯ãã£ããã£ã¯ã¹ã¿ãã¯åã«æ®ããã¦ãã¾ããã¦ã¼ã¶ã¼ã [[]æ»ã] ã­ã¼ãæ¼ãã¨ãç¾å¨ã®ã¢ã¯ãã£ããã£ãã¹ã¿ãã¯ãããããããã1 ã¤åã®ã¢ã¯ãã£ããã£ãå®è¡ä¸­ã®ã¢ã¯ãã£ããã£ã¨ãã¦åéããã¾ãã  
</p>

<p>
ã¹ã¿ãã¯ã¯ãªãã¸ã§ã¯ããä¿æãã¾ãããããã£ã¦ãåã Activity ãµãã¯ã©ã¹ã®ã¤ã³ã¹ã¿ã³ã¹ï¼ãã¨ãã°ããã ã¤ã³ã¹ã¿ã³ã¹ï¼ãè¤æ°éãã¨ãããããã®ã¤ã³ã¹ã¿ã³ã¹ãå¥ãã®ã¨ã³ããªã«ãªãã¾ããã¹ã¿ãã¯åã®ã¢ã¯ãã£ããã£ã¯ãããã·ã¥ã¾ãã¯ããããããã®ã¿ã§åéç½®ããããã¨ã¯ããã¾ããã
</p>

<p>
ã¿ã¹ã¯ã¯ã¢ã¯ãã£ããã£ã®ã¹ã¿ãã¯ã§ããããããã§ã¹ã ãã¡ã¤ã«åã®ã¯ã©ã¹ãè¦ç´ ã§ã¯ããã¾ããããããã£ã¦ãã¢ã¯ãã£ããã£ã¨ç¡é¢ä¿ã«ã¿ã¹ã¯ã®å¤ã設å®ãããã¨ã¯ã§ãã¾ãããã¿ã¹ã¯ã®å¤ã¯ãã«ã¼ã ã¢ã¯ãã£ããã£ã§ã¾ã¨ãã¦è¨­å®ãã¾ãããã¨ãã°ã次ã®ã»ã¯ã·ã§ã³ã§ã¯ãã¿ã¹ã¯ã®è¦ªåæ§ãã«ã¤ãã¦èª¬æãã¾ãããå¤ã¯ã¿ã¹ã¯ã®ã«ã¼ã ã¢ã¯ãã£ããã£ã®è¦ªåæ§ã®ã»ãããã読ã¿è¾¼ã¾ãã¾ãã
</p>

<p>
ã¿ã¹ã¯åã®ã¢ã¯ãã£ããã£ã¯ã1 ã¤ã®ã¦ãããã¨ãã¦ä¸ç·ã«ç§»åãã¾ããã¿ã¹ã¯å¨ä½ï¼ã¢ã¯ãã£ãã㣠ã¹ã¿ãã¯å¨ä½ï¼ããã©ã¢ã°ã©ã¦ã³ãã«ç§»åããããããã¯ã°ã©ã¦ã³ãã«ç§»åãããã§ãã¾ãããã¨ãã°ãç¾å¨ã®ã¿ã¹ã¯ã¯ 4 ã¤ã®ã¢ã¯ãã£ããã£ãããªãã¹ã¿ãã¯ã§ãç¾å¨ã®ã¢ã¯ãã£ããã£ã®ä¸ã«ã¢ã¯ãã£ããã£ã 3 ã¤ããã¨ãã¾ããããã§ãã¦ã¼ã¶ã¼ã [ãã¼ã ] ã­ã¼ãæ¼ãã¦ã¢ããªã±ã¼ã·ã§ã³ ã©ã³ãã£ã«ç§»åããæ°ããã¢ããªã±ã¼ã·ã§ã³ï¼å®éã«ã¯æ°ããã¿ã¹ã¯ï¼ãé¸æããã¨ãã¾ãã<i></i>ããã¨ãç¾å¨ã®ã¿ã¹ã¯ã¯ããã¯ã°ã©ã¦ã³ãã«ç§»åããæ°ããã¿ã¹ã¯ã®ã«ã¼ã ã¢ã¯ãã£ããã£ã表示ããã¾ãããã°ãããã¦ãã¦ã¼ã¶ã¼ããã¼ã ç»é¢ã«æ»ã 1 ã¤åã®ã¢ããªã±ã¼ã·ã§ã³ï¼ã¿ã¹ã¯ï¼ãé¸æããã¨ããã®ã¿ã¹ã¯ãã¹ã¿ãã¯åã® 4 ã¤ã®ã¢ã¯ãã£ããã£ã¨ã¨ãã«ãã©ã¢ã°ã©ã¦ã³ãã«ç§»åãã¾ããããã§ã¦ã¼ã¶ã¼ã [æ»ã] ã­ã¼ãæ¼ãã¦ãã中æ­ããã°ããã®ã¢ããªã±ã¼ã·ã§ã³ï¼1 ã¤åã®ã¿ã¹ã¯ã®ã«ã¼ã ã¢ã¯ãã£ããã£ï¼ã¯è¡¨ç¤ºããã¾ããã代ããã«ãã¹ã¿ãã¯ã®æä¸ä½ã®ã¢ã¯ãã£ããã£ãããããããåãã¿ã¹ã¯ã® 1 ã¤åã®ã¢ã¯ãã£ããã£ã表示ããã¾ãã 
</p>

<p>
ã¢ã¯ãã£ããã£ã¨ã¿ã¹ã¯ã®åä½ã¨ãã¦ã¯ãããã§èª¬æããåä½ãããã©ã«ãã§ãããã ãããã®åä½ã®ã»ã¨ãã©ã®è¦ç´ ã¯å¤æ´å¯è½ã§ããã¿ã¹ã¯ã¨ã¢ã¯ãã£ããã£ã®é¢é£ä»ããã¿ã¹ã¯åã§ã®ã¢ã¯ãã£ããã£ã®åä½ã¯ãã¢ã¯ãã£ããã£ãéå§ãã Intent ãªãã¸ã§ã¯ãã®ãã©ã° ã»ããã¨ããããã§ã¹ãã«æå®ããã¦ããã¢ã¯ãã£ããã£ã® <code><a href="{@docRoot}guide/topics/manifest/activity-element.html">&lt;activity&gt;</a></code> è¦ç´ ã®å±æ§ã»ããã¨ã®ç¸äºä½ç¨ã«ãã£ã¦æ±ºã¾ãã¾ãããªã¯ã¨ã¹ãå´ã¨å¿ç­å´ã®ä¸¡æ¹ãåä½ã«å½±é¿ãåã¼ãã¾ãã
</p>

<p>
ãã®ç¹ã«ããã¦ã主ã«ä½¿ç¨ãã Intent ãã©ã°ã¯ä»¥ä¸ã®ã¨ããã§ã:

<p style="margin-left: 2em">{@code FLAG_ACTIVITY_NEW_TASK} <br/>{@code FLAG_ACTIVITY_CLEAR_TOP} <br/>{@code FLAG_ACTIVITY_RESET_TASK_IF_NEEDED} <br/>{@code FLAG_ACTIVITY_SINGLE_TOP}</p>

<p>
ã¾ãã主ã«ä½¿ç¨ãã {@code &lt;activity&gt;} å±æ§ã¯ä»¥ä¸ã®ã¨ããã§ã:
  
<p style="margin-left: 2em">{@code taskAffinity} <br/>{@code launchMode} <br/>{@code allowTaskReparenting} <br/>{@code clearTaskOnLaunch} <br/>{@code alwaysRetainTaskState} <br/>{@code finishOnTaskLaunch}</p>

<p>
以éã®ã»ã¯ã·ã§ã³ã§ã¯ããããã®ãã©ã°ãå±æ§ã®å½¹å²ãç¸äºä½ç¨ã®ä»çµã¿ã使ç¨ããéã®çæäºé ãªã©ã«ã¤ãã¦èª¬æãã¾ãã
</p>


<h3 id="afftask">親åæ§ã¨æ°ããã¿ã¹ã¯</h3>

<p>
ããã©ã«ãã§ã¯ãã¢ããªã±ã¼ã·ã§ã³åã®ãã¹ã¦ã®ã¢ã¯ãã£ããã£ã¯ç¸äºã«è¦ªåæ§ãããããã¹ã¦ã®ã¢ã¯ãã£ããã£ãã§ããéãåãã¿ã¹ã¯ã«å±ããã¨ãã¾ãã<i></i>ãã ãã{@code &lt;activity&gt;} è¦ç´ ã® {@code taskAffinity} å±æ§ã使ç¨ãã¦ãã¢ã¯ãã£ããã£ãã¨ã«åå¥ã®è¦ªåæ§ã設å®ãããã¨ãã§ãã¾ããã¤ã¾ããå¥ãã®ã¢ããªã±ã¼ã·ã§ã³ã§å®ç¾©ããã¦ããã¢ã¯ãã£ããã£ã§è¦ªåæ§ãå±æããããåãã¢ããªã±ã¼ã·ã§ã³ã§å®ç¾©ããã¦ããã¢ã¯ãã£ããã£ã«å¥ãã®è¦ªåæ§ãå²ãå½ã¦ããã§ããã¨ãããã¨ã§ãã親åæ§ãä½ç¨ããç¶æ³ã¯ 2 ã¤ããã¾ãã1 ã¤ã¯ã¢ã¯ãã£ããã£ãèµ·åãã Intent ãªãã¸ã§ã¯ãã« {@code FLAG_ACTIVITY_NEW_TASK} ãã©ã°ãå«ã¾ãã¦ããå ´åããã 1 ã¤ã¯ã¢ã¯ãã£ããã£ã® {@code allowTaskReparenting} å±æ§ã "{@code true}" ã«è¨­å®ããã¦ããå ´åã§ãã 
</p>

<dl>
<dt><code>{@link android.content.Intent#FLAG_ACTIVITY_NEW_TASK}</code> ãã©ã°</dt>
<dd>æ¢ã«èª¬æããã¨ãããæ°ããã¢ã¯ãã£ããã£ã¯ãããã©ã«ãã§ã¯ {@code startActivity()} ãå¼ã³åºããã¢ã¯ãã£ããã£ã®ã¿ã¹ã¯ã®ä¸é¨ã¨ãã¦èµ·åãã¾ããã¤ã¾ããå¼ã³åºãå´ã®ã¢ã¯ãã£ããã£ã¨åãã¹ã¿ãã¯ã«ããã·ã¥ãããã¨ãããã¨ã§ãããããã{@code startActivity()} ã«æ¸¡ããã Intent ãªãã¸ã§ã¯ãã« {@code FLAG_ACTIVITY_NEW_TASK} ãã©ã°ãå«ã¾ãã¦ããå ´åãã·ã¹ãã ã¯ãã®æ°ããã¢ã¯ãã£ããã£ãå¥ã®ã¿ã¹ã¯ã«å容ãããã¨ãã¾ãããã©ã°ã®ååãããå¤æ­ã§ãã¾ãããã»ã¨ãã©ã®å ´åã¯æ°ããã¿ã¹ã¯ãéå§ããã¾ãããã ã常ã«ãããªãã¨ã¯éãã¾ãããæ¢å­ã®ã¿ã¹ã¯ã«æ°ããã¢ã¯ãã£ããã£ã¨åã親åæ§ãå²ãå½ã¦ããã¦ããå ´åããã®ã¢ã¯ãã£ããã£ã¯ãã®ã¿ã¹ã¯ã®ä¸é¨ã¨ãã¦èµ·åãã¾ããããã§ãªãå ´åã«ã¯ãæ°ããã¿ã¹ã¯ãéå§ããã¾ãã</dd>

<dt><code><a 
href="{@docRoot}guide/topics/manifest/activity-element.html#reparent">allowTaskReparenting</a></code> å±æ§</dt>
<dd>{@code allowTaskReparenting} å±æ§ã "{@code true}" ã«è¨­å®ããã¦ããã¢ã¯ãã£ããã£ã¯ããã®ã¢ã¯ãã£ããã£ã¨è¦ªåæ§ã®ããã¿ã¹ã¯ããã©ã¢ã°ã©ã¦ã³ãã«ç§»ã£ãã¨ãã«ãã¢ã¯ãã£ããã£ãéå§ããã¿ã¹ã¯ãã親åæ§ã®ããã¿ã¹ã¯ã«ç§»åã§ãã¾ãããã¨ãã°ãæè¡ã¢ããªã±ã¼ã·ã§ã³ã®ä¸é¨ã¨ãã¦ãé¸æãããé½å¸ã®å¤©æ°äºå ±ã表示ããã¢ã¯ãã£ããã£ãå®ç¾©ããã¦ããã¨ãã¾ãããã®ã¢ã¯ãã£ããã£ã«ã¯ãåãã¢ããªã±ã¼ã·ã§ã³åã®ä»ã®ã¢ã¯ãã£ããã£ã¨åã親åæ§ï¼ããã©ã«ãã®è¦ªåæ§ï¼ãå²ãå½ã¦ããã¦ãã¾ããããã®è¦ªã®å²ãå½ã¦ãå¤æ´ãããã¨ãå¯è½ã§ããããã¢ã¯ãã£ããã£ã天æ°äºå ±ã¢ã¯ãã£ããã£ãéå§ããã¨ããã®æç¹ã§ã¯éå§å´ã®ã¢ã¯ãã£ããã£ã¨åãã¿ã¹ã¯ã«å±ããç¶æã«ãªãã¾ãããããã次ã«æè¡ã¢ããªã±ã¼ã·ã§ã³ããã©ã¢ã°ã©ã¦ã³ãã«ç§»ãã¨ã天æ°äºå ±ã¢ã¯ãã£ããã£ã®å²ãå½ã¦ãå¤æ´ãããæè¡ã¢ããªã±ã¼ã·ã§ã³ã®ã¿ã¹ã¯ã®ä¸é¨ã¨ãã¦è¡¨ç¤ºããã¾ãã</dd>
</dl>

<p>
ã¦ã¼ã¶ã¼ããè¦ã¦è¤æ°ã®ãã¢ããªã±ã¼ã·ã§ã³ãã 1 ã¤ã® {@code .apk} ãã¡ã¤ã«ã«å«ã¾ãã¦ããå ´åã¯ãããããã®ã¢ããªã±ã¼ã·ã§ã³ã«é¢é£ä»ãããã¦ããã¢ã¯ãã£ããã£ã«å¥ãã®è¦ªåæ§ãå²ãå½ã¦ããã¨ããããããã¾ãã
</p>


<h3 id="lmodes">èµ·åã¢ã¼ã</h3>

<p>
<code><a href="{@docRoot}guide/topics/manifest/activity-element.html#lmode">launchMode</a></code> å±æ§ã® {@code &lt;activity&gt;} è¦ç´ ã«ã¯ã以ä¸ã® 4 種é¡ã®èµ·åã¢ã¼ããå²ãå½ã¦ããã¨ãã§ãã¾ã:
</p>

<p style="margin-left: 2em">"{@code standard}"ï¼ããã©ã«ã ã¢ã¼ãï¼<br>"{@code singleTop}"<br>"{@code singleTask}"<br>"{@code singleInstance}"</p>

<p>
ãããã®ã¢ã¼ãã¯ãããããã以ä¸ã® 4 ã¤ã®ç¹ã§ç°ãªãã¾ã:
</p>

<ul>

<li><b>ã¤ã³ãã³ãã«å¿ç­ããã¢ã¯ãã£ããã£ãã©ã®ã¿ã¹ã¯ã«ä¿æããã</b>ã"{@code standard}" ããã³ "{@code singleTop}" ã¢ã¼ãã®å ´åã¯ããã®ã¤ã³ãã³ããéå§ããï¼ã¤ã¾ã <code>{@link android.content.Context#startActivity startActivity()}</code> ãå¼ã³åºããï¼ã¿ã¹ã¯ã«ä¿æããã¾ãããã ããIntent ãªãã¸ã§ã¯ãã« <code>{@link android.content.Intent#FLAG_ACTIVITY_NEW_TASK}</code> ãã©ã°ãå«ã¾ãã¦ããå ´åã¯ãåã®ã»ã¯ã·ã§ã³<a href="#afftask">親åæ§ã¨æ°ããã¿ã¹ã¯</a>ã§èª¬æããã¨ãããå¥ã®ã¿ã¹ã¯ãé¸æããã¾ãã  

<p>
ä¸æ¹ã"{@code singleTask}" ããã³ "{@code singleInstance}" ã¢ã¼ãã®å ´åã¯ãã¢ã¯ãã£ããã£ã常ã«ã¿ã¹ã¯ã®ã«ã¼ã ã¢ã¯ãã£ããã£ã«ãªãã¾ããã¿ã¹ã¯ã¯å®ç¾©ããã¦ãããä»ã®ã¿ã¹ã¯ã®ä¸é¨ã¨ãã¦èµ·åããããã¨ã¯ããã¾ããã
</p>  

<li><p><b>ã¢ã¯ãã£ããã£ã®ã¤ã³ã¹ã¿ã³ã¹ãè¤æ°çæã§ããã</b>ã"{@code standard}" ã¾ã㯠"{@code singleTop}" ã¢ã¯ãã£ããã£ã¯è¤æ°åã¤ã³ã¹ã¿ã³ã¹åã§ãã¾ãããããã®ã¤ã³ã¹ã¿ã³ã¹ãè¤æ°ã®ã¿ã¹ã¯ã«å²ãå½ã¦ããã¨ããç¹å®ã®ã¿ã¹ã¯ã«åãã¢ã¯ãã£ããã£ã®è¤æ°ã®ã¤ã³ã¹ã¿ã³ã¹ãå²ãå½ã¦ããã¨ãå¯è½ã§ãã
</p> 

<p>
ä¸æ¹ã"{@code singleTask}" ããã³ "{@code singleInstance}" ã¢ã¯ãã£ããã£ã®ã¤ã³ã¹ã¿ã³ã¹ã¯ 1 ã¤ã«å¶éããã¾ãããããã®ã¢ã¯ãã£ããã£ã¯ã¿ã¹ã¯ã®ã«ã¼ãã«å½ããã¾ãããããã£ã¦ããããã®ã¿ã¹ã¯ã®è¤æ°ã®ã¤ã³ã¹ã¿ã³ã¹ãããã¤ã¹ä¸ã«åæã«å­å¨ãããã¨ã¯ãªãã¨ãããã¨ã«ãªãã¾ãã
</p>    

<li><p><b>ã¤ã³ã¹ã¿ã³ã¹ã®ã¿ã¹ã¯ã«ä»ã®ã¢ã¯ãã£ããã£ãå«ãããã¨ãã§ããã</b>ã"{@code singleInstance}" ã¢ã¯ãã£ããã£ã¯ããã®ã¿ã¹ã¯åã®å¯ä¸ã®ã¢ã¯ãã£ããã£ã¨ãã¦åç¬ã§åä½ãã¾ããããããå¥ã®ã¢ã¯ãã£ããã£ãéå§ããå ´åããã®ã¢ã¯ãã£ããã£ã¯èµ·åã¢ã¼ãã«é¢ä¿ãªããããããã¤ã³ãã³ãã« {@code FLAG_ACTIVITY_NEW_TASK} ãã©ã°ãå«ã¾ãã¦ãããã®ããã«å¥ã®ã¿ã¹ã¯ã§èµ·åãã¾ãã"{@code singleInstance}" ã¢ã¼ã㨠"{@code singleTask}" ã¢ã¼ãã¯ããã以å¤ã®ç¹ã§ã¯ã¾ã£ããåãã§ãã</p>

<p>
ä»ã® 3 ã¤ã®ã¢ã¼ãã§ã¯ãã¿ã¹ã¯ã«è¤æ°ã®ã¢ã¯ãã£ããã£ãå²ãå½ã¦ããã¨ãã§ãã¾ãã"{@code singleTask}" ã¢ã¯ãã£ããã£ã¯ã常ã«ã¿ã¹ã¯ã®ã«ã¼ã ã¢ã¯ãã£ããã£ã«ãªãã¾ãããåãã¿ã¹ã¯ã«å²ãå½ã¦ããã¨ã«ãªãå¥ã®ã¢ã¯ãã£ããã£ãéå§ãããã¨ãã§ãã¾ãã"{@code standard}" ããã³ "{@code singleTop}" ã¢ã¯ãã£ããã£ã®ã¤ã³ã¹ã¿ã³ã¹ã¯ãã¹ã¿ãã¯åã®ã©ã®ä½ç½®ã«ã§ãéç½®ã§ãã¾ãã  
</p></li>

<li><b>ã¯ã©ã¹ã®æ°ããã¤ã³ã¹ã¿ã³ã¹ãèµ·åãã¦æ°ããã¤ã³ãã³ããå¦çãããã©ãã</b>ãããã©ã«ãã® "{@code standard}" ã¢ã¼ãã®å ´åã¯ãæ°ããã¤ã³ãã³ãã«å¿ç­ããã¨ãã«ã¯å¿ãæ°ããã¤ã³ã¹ã¿ã³ã¹ãä½æããã¾ããããããã®ã¤ã³ã¹ã¿ã³ã¹ã§å¦çããã¤ã³ãã³ã㯠1 ã¤ã®ã¿ã§ãã"{@code singleTop}" ã¢ã¼ãã®å ´åã¯ãã¯ã©ã¹ã®æ¢å­ã®ã¤ã³ã¹ã¿ã³ã¹ã対象ã¿ã¹ã¯ã®ã¢ã¯ãã£ãã㣠ã¹ã¿ãã¯ã®æä¸ä½ã«ããã°ããããåå©ç¨ãã¦æ°ããã¤ã³ãã³ããå¦çãã¾ããã¹ã¿ãã¯ã®æä¸ä½ã«ãªãå ´åã¯åå©ç¨ããã¾ããã代ããã«ãæ°ããã¤ã³ã¹ã¿ã³ã¹ãä½æããã¦ã¹ã¿ãã¯ã«ããã·ã¥ãããæ°ããã¤ã³ãã³ãã®å¦çã«ä½¿ç¨ããã¾ãã

<p>
ãã¨ãã°ãã¿ã¹ã¯ã®ã¢ã¯ãã£ãã㣠ã¹ã¿ãã¯ã«ãã«ã¼ã ã¢ã¯ãã£ãã㣠A ã¨ã¢ã¯ãã£ãã㣠BãCãD ãå«ã¾ãã¦ããã¨ãã¾ããã¹ã¿ãã¯åã®ã¢ã¯ãã£ããã£ã®é åºã¯ A-B-C-D 㧠D ãæä¸ä½ã§ããããã«ãã¢ã¯ãã£ããã£ã®ã¿ã¤ãã D ã®ã¤ã³ãã³ããå±ãã¾ããD ã®èµ·åã¢ã¼ããããã©ã«ãã® "{@code standard}" ã§ããå ´åã¯ããã®ã¯ã©ã¹ã®æ°ããã¤ã³ã¹ã¿ã³ã¹ãèµ·åããã¹ã¿ãã¯ã¯ A-B-C-D-D ã¨ãªãã¾ããããããD ã®èµ·åã¢ã¼ãã "{@code singleTop}" ã§ããã°ãã¹ã¿ãã¯ã®æä¸ä½ã¯ D ãªã®ã§ãæ°ããã¤ã³ãã³ãã¯æ¢å­ã®ã¤ã³ã¹ã¿ã³ã¹ã«ãã£ã¦å¦çãããã¯ãã§ãããããã£ã¦ãã¹ã¿ãã¯ã¯ A-B-C-D ã®ã¾ã¾ã¨ãªãã¾ãã  
</p>

<p>
ä¸æ¹ãå±ããã¤ã³ãã³ãã®ã¢ã¯ãã£ãã㣠ã¿ã¤ãã B ã ã£ãå ´åã¯ãB ã®ã¢ã¼ãã "{@code standard}" ã§ãã£ã¦ã "{@code singleTop}"ã§ãã£ã¦ã B ã®æ°ããã¤ã³ã¹ã¿ã³ã¹ãèµ·åãã¾ãããã㯠B ãã¹ã¿ãã¯ã®æä¸ä½ã§ã¯ãªãããã§ãçµæã¨ãã¦ã¹ã¿ãã¯ã¯ A-B-C-D-B ã¨ãªãã¾ãã
</p>

<p>
"{@code singleTask}" ã¾ã㯠"{@code singleInstance}" ã¢ã¯ãã£ããã£ã®å ´åã¯ãæ¢ã«èª¬æããã¨ããåæã«è¤æ°ã®ã¤ã³ã¹ã¿ã³ã¹ãå­å¨ãããã¨ã¯ãªããããã¤ã³ã¹ã¿ã³ã¹ã¯å¸¸ã«æ°ããã¤ã³ãã³ããå¦çãããã¨ã«ãªãã¾ãã"{@code singleInstance}" ã¢ã¯ãã£ããã£ã¯ã¹ã¿ãã¯åã®å¯ä¸ã®ã¢ã¯ãã£ããã£ã§ããããã常ã«ã¹ã¿ãã¯ã®æä¸ä½ãã¤ã¾ãã¤ã³ãã³ããå¦çããä½ç½®ã«ããã¾ããä¸æ¹ã"{@code singleTask}" ã¢ã¯ãã£ããã£ã¯ãã¹ã¿ãã¯åã®ä¸ä½ã«ä»ã®ã¢ã¯ãã£ããã£ãããå ´åã¨ãªãå ´åãããã¾ããä¸ä½ã«ã¢ã¯ãã£ããã£ãããå ´åãã¤ã³ãã³ããå¦çããä½ç½®ã«ã¯ãªãããããã®ã¤ã³ãã³ãã¯ãã­ããããã¾ãï¼ã¤ã³ãã³ãããã­ãããããã¨ãã¦ãããã®ã¤ã³ãã³ããå±ãããã¨ã«ãã£ã¦ãã¿ã¹ã¯ããã©ã¢ã°ã©ã¦ã³ãã«ç§»ã£ãã¾ã¾ã®ç¶æã«ãªãã¾ãï¼ã
</p>
</li>

</ul>

<p>
æ¢å­ã®ã¢ã¯ãã£ããã£ã§æ°ããã¤ã³ãã³ããå¦çãããã¨ã«ãªã£ãå ´åã¯ã<code>{@link android.app.Activity#onNewIntent onNewIntent()}</code> ã®å¼ã³åºãã«ãã£ã¦ Intent ãªãã¸ã§ã¯ããã¢ã¯ãã£ããã£ã«æ¸¡ããã¾ãï¼æåã«ã¢ã¯ãã£ããã£ãéå§ããã¤ã³ãã³ã ãªãã¸ã§ã¯ã㯠<code>{@link android.app.Activity#getIntent getIntent()}</code> ãå¼ã³åºãã¦åå¾ã§ãã¾ãï¼ã
</p>

<p>
ãªããæ°ããã¤ã³ãã³ããå¦çããããã«ã¢ã¯ãã£ããã£ã®æ°ããã¤ã³ã¹ã¿ã³ã¹ãä½æãããå ´åãã¦ã¼ã¶ã¼ã¯ [[]æ»ã] ã­ã¼ãæ¼ã㦠1 ã¤åã®ç¶æï¼1 ã¤åã®ã¢ã¯ãã£ããã£ï¼ã«æ»ããã¨ãã§ãã¾ããããããã¢ã¯ãã£ããã£ã®æ¢å­ã®ã¤ã³ã¹ã¿ã³ã¹ã§æ°ããã¤ã³ãã³ããå¦çããå ´åã¯ã[[]æ»ã] ã­ã¼ãæ¼ãã¦ããæ°ããã¤ã³ãã³ããå±ãåã«ãã®ã¤ã³ã¹ã¿ã³ã¹ã§å¦çãã¦ããä½æ¥­ã«æ»ããã¨ã¯ã§ãã¾ããã
</p>

<p>
èµ·åã¢ã¼ãã«ã¤ãã¦è©³ããã¯ã<code><a href="{@docRoot}guide/topics/manifest/activity-element.html">&lt;activity&gt;</a></code> è¦ç´ ã®èª¬æãã覧ãã ããã 
</p>


<h3 id="clearstack">ã¹ã¿ãã¯ã®ã¯ãªã¢</h3>

<p>
ã¦ã¼ã¶ã¼ãã¿ã¹ã¯ãé·æéæ¾ç½®ããã¨ãã¿ã¹ã¯ã®ã«ã¼ã ã¢ã¯ãã£ããã£ãé¤ããã¹ã¦ã®ã¢ã¯ãã£ããã£ãã¯ãªã¢ããã¾ããã¦ã¼ã¶ã¼ãã¿ã¹ã¯ã«æ»ãã¨ãã¿ã¹ã¯ã¯ä»¥åã®ããã«è¡¨ç¤ºããã¾ãããæ®ã£ã¦ããã®ã¯æåã®ã¢ã¯ãã£ããã£ã ãã§ããã¤ã¾ããä¸å®ã®æéãçµéãã¦ããã°ã¦ã¼ã¶ã¼ã¯ä»¥åã®ä½æ¥­ãæ¾æ£ãã¦ãã¦ãæ°ããä½æ¥­ãããããã«ãã®ã¿ã¹ã¯ã«æ»ã£ã¦ããã¨èããããã§ãã
</p>

<p>
ãããããã©ã«ãã§ãããã®åä½ãå¤æ´ãããå ´åã¯ã以ä¸ã®ã¢ã¯ãã£ããã£å±æ§ã使ç¨ãã¾ã:
</p>

<dl>
<dt><code><a 
href="{@docRoot}guide/topics/manifest/activity-element.html#always">alwaysRetainTaskState</a></code> å±æ§</dt>
<dd>ã¿ã¹ã¯ã®ã«ã¼ã ã¢ã¯ãã£ããã£ã§ãã®å±æ§ã "{@code true}" ã«è¨­å®ããã¨ãä¸ã§èª¬æããããã©ã«ãã®åä½ã¯çºçãã¾ãããé·æéçµéãã¦ããã¿ã¹ã¯åã®ãã¹ã¦ã®ã¢ã¯ãã£ããã£ã¯ãã®ã¾ã¾æ®ããã¾ãã</dd>

<dt><code><a 
href="{@docRoot}guide/topics/manifest/activity-element.html#clear">clearTaskOnLaunch</a></code> å±æ§</dt>
<dd>ã¿ã¹ã¯ã®ã«ã¼ã ã¢ã¯ãã£ããã£ã§ãã®å±æ§ã "{@code true}" ã«è¨­å®ããå ´åãã¦ã¼ã¶ã¼ããã£ããã¿ã¹ã¯ãé¢ããã¨ãæ»ã£ãã¨ãã«ã¯ã«ã¼ããå«ããã¹ã¦ã®ã¢ã¯ãã£ããã£ãã¯ãªã¢ããã¦ãã¾ããã¤ã¾ãã{@code alwaysRetainTaskState} ã®æ­£å対ã®åä½ã«ãªãã¾ããã¦ã¼ã¶ã¼ãä¸ç¬ã§ãã¿ã¹ã¯ãé¢ããã¨ãæåã®ç¶æããããç´ããã¨ã«ãªãã¾ãã</dd>

<dt><code><a 
href="{@docRoot}guide/topics/manifest/activity-element.html#finish">finishOnTaskLaunch</a></code> å±æ§</dt>
<dd>ãã®å±æ§ã¯ {@code clearTaskOnLaunch} ã«ä¼¼ã¦ãã¾ãããã¿ã¹ã¯å¨ä½ã§ã¯ãªãåä¸ã®ã¢ã¯ãã£ããã£ã«ä½ç¨ãã¾ããã¾ããã«ã¼ã ã¢ã¯ãã£ããã£ãå«ãã©ã®ã¢ã¯ãã£ããã£ãã¯ãªã¢ã®å¯¾è±¡ã¨ãªããã¾ãããã®å±æ§ã "{@code true}" ã«è¨­å®ãããã¢ã¯ãã£ããã£ã¯ãç¾å¨ã®ã»ãã·ã§ã³ã®éã®ã¿ã¿ã¹ã¯ã®ä¸é¨ãå½¢æãã¾ããã¦ã¼ã¶ã¼ããã£ãããã®ã¿ã¹ã¯ããé¢ãã¦ãããå度ã¿ã¹ã¯ã«æ»ãã¨ããã®ã¢ã¯ãã£ããã£ã¯ã¯ãªã¢ããã¦ãã¾ã</dd>
</dl>

<p>
ã¢ã¯ãã£ããã£ãã¹ã¿ãã¯ããåé¤ããæ¹æ³ã¯ä»ã«ãããã¾ããIntent ãªãã¸ã§ã¯ãã« <code>{@link 
android.content.Intent#FLAG_ACTIVITY_CLEAR_TOP FLAG_ACTIVITY_CLEAR_TOP}</code> ãã©ã°ãå«ã¾ãã¦ããããã®ã¤ã³ãã³ããå¦çãã¹ãã¿ã¤ãã®ã¢ã¯ãã£ããã£ã®ã¤ã³ã¹ã¿ã³ã¹ã対象ã¿ã¹ã¯ã®ã¹ã¿ãã¯åã«å­å¨ããå ´åã¯ããã®ã¤ã³ã¹ã¿ã³ã¹ãã¹ã¿ãã¯ã®æä¸ä½ã«ãªã£ã¦ã¤ã³ãã³ãã«å¿ç­ã§ãããããããããä¸ä½ã®ã¢ã¯ãã£ããã£ã¯ãã¹ã¦ã¯ãªã¢ããã¾ããæå®ãããã¢ã¯ãã£ããã£ã®èµ·åã¢ã¼ãã "{@code standard}" ã§ããå ´åã¯ããã®ã¢ã¯ãã£ããã£ãã¹ã¿ãã¯ããåé¤ãããæ°ããã¤ã³ã¹ã¿ã³ã¹ãèµ·åãã¦ã¤ã³ãã³ããå¦çãã¾ããèµ·åã¢ã¼ã "{@code standard}" ã§ã¯ãæ°ããã¤ã³ãã³ããå¦çããéã常ã«æ°ããã¤ã³ã¹ã¿ã³ã¹ãä½æãããããã§ãã
</p>

<p>
{@code FLAG_ACTIVITY_CLEAR_TOP} ã¯ãã»ã¨ãã©ã®å ´å {@code FLAG_ACTIVITY_NEW_TASK} ã¨çµã¿åããã¦ä½¿ç¨ãã¾ãããããã®ãã©ã°ãçµã¿åãããã¨ãå¥ã®ã¿ã¹ã¯ã«æ¢ã«å­å¨ãã¦ããã¢ã¯ãã£ããã£ãæ¢ãããããã¤ã³ãã³ãã«å¿ç­ã§ããä½ç½®ã«éç½®ã§ãã¾ãã  
</p>


<h3 id="starttask">ã¿ã¹ã¯ã®éå§</h3>

<p>
ã¢ã¯ãã£ããã£ãã¿ã¹ã¯ã®ã¨ã³ã㪠ãã¤ã³ãã¨ãã¦è¨­å®ããã«ã¯ãã¢ã¯ã·ã§ã³ã¨ã㦠"{@code android.intent.action.MAIN}"ãã«ãã´ãªã¨ã㦠"{@code android.intent.category.LAUNCHER}" ãæå®ããã¤ã³ãã³ã ãã£ã«ã¿ãã¢ã¯ãã£ããã£ã«è¿½å ãã¾ãï¼ãã®ã¿ã¤ãã®ãã£ã«ã¿ã®ä¾ã«ã¤ãã¦ã¯ã<a href="#ifilters">ã¤ã³ãã³ã ãã£ã«ã¿</a>ãã覧ãã ããï¼ããã®ã¿ã¤ãã®ãã£ã«ã¿ã追å ããã¨ãã¢ã¯ãã£ããã£ã®ã¢ã¤ã³ã³ã¨ã©ãã«ãã¢ããªã±ã¼ã·ã§ã³ ã©ã³ãã£ã«è¡¨ç¤ºããã¾ããããã«ãããã¦ã¼ã¶ã¼ãã¿ã¹ã¯ãèµ·åããããã®æ段ãæä¾ã§ããã ãã§ãªããèµ·åå¾ã¯ãã¤ã§ããã®ã¿ã¹ã¯ã«æ»ããããã«ãããã¨ãã§ãã¾ãã
</p>

<p>
ãã® 2 çªç®ã®æ©è½ãã¤ã¾ãã¦ã¼ã¶ã¼ããã£ããã¿ã¹ã¯ãé¢ãã¦ãå¾ã§æ»ããã¨ãã§ããããã«ããç¹ãéè¦ã§ãããã®çç±ãããã¢ã¯ãã£ããã£ã« {@code MAIN} 㨠{@code LAUNCHER} ãã£ã«ã¿ãæå®ããã¦ããå ´åã¯ãå¿ãã¿ã¹ã¯ãéå§ãããèµ·åã¢ã¼ãï¼"{@code singleTask}" ã¾ã㯠"{@code singleInstance}"ï¼ã使ç¨ããå¿è¦ãããã¾ãããã¨ãã°ããã®ãã£ã«ã¿ãæå®ããªãã£ãå ´åãèãã¦ã¿ã¾ããããã¤ã³ãã³ãã "{@code singleTask}" ã¢ã¯ãã£ããã£ãèµ·åããæ°ããã¿ã¹ã¯ãéå§ãããã¦ã¼ã¶ã¼ããã°ããã®éãã®ã¿ã¹ã¯ã§ä½æ¥­ãè¡ãã¾ãããã®å¾ãã¦ã¼ã¶ã¼ã [ãã¼ã ] ã­ã¼ãæ¼ããã¨ãã¾ãããã¼ã ç»é¢ã表示ãããåã»ã©ã®ã¿ã¹ã¯ã¯ããã¯ã°ã©ã¦ã³ãã«ç§»åãã¾ãããããããã®ã¿ã¹ã¯ã¯ã¢ããªã±ã¼ã·ã§ã³ ã©ã³ãã£ã«ã¯è¡¨ç¤ºããã¦ããªããããã¦ã¼ã¶ã¼ãã¿ã¹ã¯ã«æ»ãããã®æ段ãããã¾ããã
</p>

<p>
{@code FLAG_ACTIVITY_NEW_TASK} ãã©ã°ã«ããããã¨åããããªé£ãããããã¾ãããã®ãã©ã°ãæå®ããã¢ã¯ãã£ããã£ã§ã¯ãæ°ããã¿ã¹ã¯ãéå§ããå¾ã«ã¦ã¼ã¶ã¼ã [ãã¼ã ] ã­ã¼ãæ¼ãã¦ãã®ã¿ã¹ã¯ãé¢ããå ´åã«åããã¿ã¹ã¯ã«æ»ãããã®æ段ãç¨æãã¦ããå¿è¦ãããã¾ããä¸é¨ã®ã¨ã³ãã£ãã£ï¼ãã¨ãã°éç¥ããã¼ã¸ã£ï¼ã¯ãã¢ã¯ãã£ããã£ã常ã«å¤é¨ã¿ã¹ã¯ã¨ãã¦éå§ãã¾ããã¨ã³ãã£ãã£ã®ä¸é¨ã¨ãã¦éå§ãããã¨ã¯ãªãããã{@code startActivity()} ã«æ¸¡ãã¤ã³ãã³ãã«ã¯å¿ã {@code FLAG_ACTIVITY_NEW_TASK} ãæå®ãã¾ããå¤é¨ã¨ã³ãã£ãã£ããå¼ã³åºããã¨ã®ã§ããã¢ã¯ãã£ããã£ã§ãã®ãã©ã°ã使ç¨ããã¦ããå¯è½æ§ãããå ´åã¯ãéå§ãããã¿ã¹ã¯ã«ã¦ã¼ã¶ã¼ãæ»ãããã®æ段ãå¥éæä¾ããããã«ãã¦ãã ããã
</p> 

<p>
ã¦ã¼ã¶ã¼ãã¢ã¯ãã£ããã£ã«æ»ããã¨ãã§ããããã«ããªãå ´åã¯ã{@code &lt;activity&gt;} è¦ç´ ã® {@code finishOnTaskLaunch} ã "{@code true}" ã«è¨­å®ãã¾ãã詳ããã¯ã<a href="#clearstack">ã¹ã¿ãã¯ã®ã¯ãªã¢</a>ãã覧ãã ããã
</p>


<h2 id="procthread">ãã­ã»ã¹ã¨ã¹ã¬ãã</h2>

<p>
Android ã§ã¯ãæåã®ã¢ããªã±ã¼ã·ã§ã³ ã³ã³ãã¼ãã³ããå®è¡ããå¿è¦ãçããã¨ããã®ããã® Linux ãã­ã»ã¹ãåä¸ã®å®è¡ã¹ã¬ããã§éå§ãã¾ããããã©ã«ãã§ã¯ãã¢ããªã±ã¼ã·ã§ã³ã®ãã¹ã¦ã®ã³ã³ãã¼ãã³ãããã®ãã­ã»ã¹ã¨ã¹ã¬ããã§å®è¡ããã¾ãã
</p>

<p>
ãã ããã³ã³ãã¼ãã³ããä»ã®ãã­ã»ã¹ã§å®è¡ãããããã«ããããç¹å®ã®ãã­ã»ã¹ã«ä½¿ç¨ãã追å ã¹ã¬ãããçæããããããã¨ãå¯è½ã§ãã
</p>


<h3 id="procs">ãã­ã»ã¹</h3>

<p>
ã³ã³ãã¼ãã³ããå®è¡ãããã­ã»ã¹ã¯ããããã§ã¹ã ãã¡ã¤ã«ã§ç®¡çãã¾ããã³ã³ãã¼ãã³ãã®åè¦ç´ ï¼{@code &lt;activity&gt;}ã{@code &lt;service&gt;}ã{@code &lt;receiver&gt;}ãããã³ {@code &lt;provider&gt;}ï¼ã«ã¯ {@code process} å±æ§ãããããã®ã³ã³ãã¼ãã³ããã©ã®ãã­ã»ã¹ã§å®è¡ãã¹ãããæå®ã§ããããã«ãªã£ã¦ãã¾ãããããã®å±æ§ã®è¨­å®ã«ãã£ã¦ãããããã®ã³ã³ãã¼ãã³ããå°ç¨ã®ãã­ã»ã¹ã§å®è¡ããããä¸é¨ã®ã³ã³ãã¼ãã³ãã ãã§ãã­ã»ã¹ãå±æãããã§ãã¾ããã¾ããå¥ãã®ã¢ããªã±ã¼ã·ã§ã³ã®ã³ã³ãã¼ãã³ãããåããã­ã»ã¹ã§å®è¡ãããããã«è¨­å®ãããã¨ãã§ãã¾ãããã®å ´åã¯ããããã®ã¢ããªã±ã¼ã·ã§ã³ãåã Linux ã¦ã¼ã¶ã¼ ID ãå±æããåãèªè¨¼æ©é¢ã«ãã£ã¦ç½²åããã¦ããå¿è¦ãããã¾ãã{@code &lt;application&gt;} è¦ç´ ã«ã {@code process} å±æ§ãããããã¹ã¦ã®ã³ã³ãã¼ãã³ãã«é©ç¨ãããããã©ã«ãå¤ã設å®ã§ãã¾ãã
</p>

<p>
ãã¹ã¦ã®ã³ã³ãã¼ãã³ãã¯æå®ããããã­ã»ã¹ã®ã¡ã¤ã³ ã¹ã¬ããã§ã¤ã³ã¹ã¿ã³ã¹åãããã³ã³ãã¼ãã³ãã«å¯¾ããã·ã¹ãã  ã³ã¼ã«ã¯ãã®ã¹ã¬ãããããã£ã¹ãããããã¾ãã1 ã¤ã®ã¤ã³ã¹ã¿ã³ã¹ã«å¯¾ãã¦ãè¤æ°ã®ã¹ã¬ãããä½æããããã¨ã¯ããã¾ããããããã£ã¦ãã·ã¹ãã  ã³ã¼ã«ã«å¿ç­ããã¡ã½ããï¼ãã¨ãã°ãå¾ã»ã©<a href="#lcycles">ã³ã³ãã¼ãã³ã ã©ã¤ããµã¤ã¯ã«</a>ã§èª¬æããã©ã¤ããµã¤ã¯ã«éç¥ããã¦ã¼ã¶ã¼ã®ã¢ã¯ã·ã§ã³ãå ±åãã <code>{@link android.view.View#onKeyDown View.onKeyDown()}</code> ã®ãããªã¡ã½ããï¼ã¯ã常ã«ãã®ãã­ã»ã¹ã®ã¡ã¤ã³ ã¹ã¬ããã§å®è¡ããã¾ããã¤ã¾ããã³ã³ãã¼ãã³ããã·ã¹ãã ããå¼ã³åºãããã¨ãã«ããã­ã»ã¹åã®ä»ã®ã³ã³ãã¼ãã³ãã®å®è¡ã妨ããªããããå®è¡ã«æéããããå¦çãä»ã®å¦¨ãã«ãªããã¨ã®å¤ãå¦çï¼ãããã¯ã¼ã¯å¦çãã«ã¼ãè¨ç®ãªã©ï¼ãã§ããéãé¿ããå¿è¦ãããã¨ãããã¨ã§ããæéããããå¦çã«ã¯å¥ã®ã¹ã¬ãããçæã§ãã¾ãã詳ããã¯ã次ã®<a href="#threads">ã¹ã¬ãã</a> ã»ã¯ã·ã§ã³ãã覧ãã ããã
</p>

<p>
ç¶æ³ã«ãã£ã¦ã¯ãAndroid ããã­ã»ã¹ãçµäºãããã¹ãã¨å¤æ­ããå ´åãããã¾ãããã¨ãã°ãã¡ã¢ãªãä¸è¶³ãã¦ããå ´åããä»ã®ãã­ã»ã¹ã§ã¦ã¼ã¶ã¼ã«ãã°ããå¿ç­ããå¿è¦ãããå ´åã§ãããã­ã»ã¹ãçµäºããã¨ããã®ãã­ã»ã¹åã§å®è¡ããã¦ããã¢ããªã±ã¼ã·ã§ã³ ã³ã³ãã¼ãã³ãã¯ç ´æ£ããã¾ãããããã®ã³ã³ãã¼ãã³ãã§å¦çããä½æ¥­ãããä¸åº¦çºçããã¨ããã®ããã®ãã­ã»ã¹ãåã³éå§ããã¾ãã
</p>  

<p>
Android ã§ã¯ãã©ã®ãã­ã»ã¹ãçµäºãããããå¤æ­ãããããã¦ã¼ã¶ã¼ã«ã¨ã£ã¦ã®ç¸å¯¾çãªéè¦åº¦ãéã¿ä»ããã¦ç®¡çãã¾ãããã¨ãã°ãã¢ã¯ãã£ããã£ãã¾ã ç»é¢ã«è¡¨ç¤ºããã¦ãããã­ã»ã¹ãçµäºãããããããã¢ã¯ãã£ããã£ãç»é¢ã«è¡¨ç¤ºããã¦ããªããã­ã»ã¹ãçµäºãããæ¹ãåççã§ãããããã£ã¦ããã­ã»ã¹ãçµäºããããã©ããã¯ããã®ãã­ã»ã¹ã§å®è¡ããã¦ããã³ã³ãã¼ãã³ãã®ç¶æã«å¿ãã¦å¤æ­ãããã¨ãããã¨ã§ããã³ã³ãã¼ãã³ãã®ç¶æã«ã¤ãã¦ã¯ãå¾ã»ã©<a href="#lcycles">ã³ã³ãã¼ãã³ãã®ã©ã¤ããµã¤ã¯ã«</a>ã§è©³ãã説æãã¾ãã
</p>


<h3 id="threads">ã¹ã¬ãã</h3>

<p>
ã¢ããªã±ã¼ã·ã§ã³ãåä¸ã®ãã­ã»ã¹ã«éå®ããã¨ãã¦ããããã¯ã°ã©ã¦ã³ãã§ã®å¦çã«ã¹ã¬ãããå¿è¦ã«ãªããã¨ã¯ããããã¾ããã¦ã¼ã¶ã¼ ã¤ã³ã¿ã¼ãã§ã¼ã¹ã¯ã¦ã¼ã¶ã¼ã®ã¢ã¯ã·ã§ã³ã«å¯¾ãã¦å¸¸ã«ãã°ããå¿ç­ã§ããªããã°ãªããªããããã¢ã¯ãã£ããã£ããã¹ãããã¹ã¬ããã§ããããã¯ã¼ã¯ ãã¦ã³ã­ã¼ãã®ãããªæéã®ãããå¦çãä¸ç·ã«ãã¹ãããªãããã«ããå¿è¦ãããã¾ããããã«å®äºããªãå¯è½æ§ã®ãããã¹ã¦ã®å¦çã¯ãå¥ã®ã¹ã¬ããã«å²ãå½ã¦ãããã«ãã¦ãã ããã 
</p>

<p>
ã¹ã¬ããã¯ãæ¨æºã® Java {@link java.lang.Thread} ãªãã¸ã§ã¯ãã使ç¨ãã¦ã³ã¼ãåã§ä½æãã¾ããAndroid ã«ã¯ãã¹ã¬ããã管çããããã®ä¾¿å©ãªã¯ã©ã¹ãæ°å¤ãç¨æããã¦ãã¾ãããã¨ãã°ãã¹ã¬ããåã§ã¡ãã»ã¼ã¸ ã«ã¼ããå®è¡ããããã® {@link android.os.Looper}ãã¡ãã»ã¼ã¸ãå¦çããããã® {@link android.os.Handler}ãã¡ãã»ã¼ã¸ ã«ã¼ãã§ã¹ã¬ããã設å®ããããã® {@link android.os.HandlerThread} ãªã©ãããã¾ãã
</p>


<h3 id="rpc">ãªã¢ã¼ã ãã­ã·ã¼ã¸ã£ ã³ã¼ã«</h3>

<p>
Androidã¯è»½éãªä»çµã¿ã®ãªã¢ã¼ãã»ãã­ã·ã¼ã¸ã£ã»ã³ã¼ã« (RPC) ãæ¡ç¨ãã¦ãã¾ããRPC ã¨ã¯ãã¡ã½ãããã­ã¼ã«ã«ã§å¼ã³åºãã¾ãããå®è¡ã¯ãªã¢ã¼ãï¼å¥ã®ãã­ã»ã¹ï¼ã§è¡ãããã®çµæãå¼ã³åºãå´ã«è¿ãã¾ãããã®ããã«ã¯ãã¡ã½ããå¼ã³åºãã¨ããã«ä»éãããã¼ã¿ããªãã¬ã¼ãã£ã³ã°ã·ã¹ãã ã解éã§ããã¬ãã«ã¾ã§å解ãã¦ãããããããã­ã¼ã«ã«ã®ãã­ã»ã¹ã¨ã¢ãã¬ã¹ç©ºéãããªã¢ã¼ãã®ãã­ã»ã¹ã¨ã¢ãã¬ã¹ç©ºéã«è»¢éãããªã¢ã¼ãã§å¼ã³åºããåæ§ç¯ããå¿è¦ãããã¾ããæ»ãå¤ã¯ãå対æ¹åã«è»¢éããªããã°ãªãã¾ãããAndroid ã«ã¯ãã®å¦çãè¡ãããã®ã³ã¼ãããã¹ã¦ç¨æããã¦ãããããRPC ã¤ã³ã¿ã¼ãã§ã¼ã¹ãå®ç¾©ãã¦å®è£ããã ã㧠RPC ãå©ç¨ã§ãã¾ãã
</p>

<p>
RPC ã¤ã³ã¿ã¼ãã§ã¼ã¹ã«å«ãããã¨ãã§ããã®ã¯ã¡ã½ããã®ã¿ã§ãããã¹ã¦ã®ã¡ã½ããã¯ãæ»ãå¤ããªãå ´åã§ãåæçã«å®è¡ããã¾ãï¼ã¤ã¾ãããªã¢ã¼ã ã¡ã½ãããå®äºããã¾ã§ã­ã¼ã«ã« ã¡ã½ããããã­ãã¯ããã¾ãï¼ã
</p>

<p>
ãã®ã¡ã«ããºã ãç°¡åã«èª¬æããã¨æ¬¡ã®ããã«ãªãã¾ããã¾ããã·ã³ãã«ãªã¤ã³ã¿ã¼ãã§ã¼ã¹å®ç¾©è¨èªï¼IDLï¼ã使ç¨ãã¦ãå®è£ããã RPC ã¤ã³ã¿ã¼ãã§ã¼ã¹ã宣è¨ãã¾ãã<code><a href="{@docRoot}guide/components/aidl.html">aidl</a></code> ãã¼ã«ã«ãããRPC ã¤ã³ã¿ã¼ãã§ã¼ã¹ã®å®£è¨ãã Java ã¤ã³ã¿ã¼ãã§ã¼ã¹å®ç¾©ãçæããã¾ãããã®å®ç¾©ã¯ãã­ã¼ã«ã«ã¨ãªã¢ã¼ãã®ä¸¡æ¹ã®ãã­ã»ã¹ã§ä½¿ç¨ããå¿è¦ãããã¾ããå®ç¾©ã«ã¯ã次ã®å³ã«ç¤ºãããã« 2 ã¤ã®åé¨ã¯ã©ã¹ãå«ã¾ãã¦ãã¾ã:
</p>

<p style="margin-left: 2em">
<img src="{@docRoot}images/binder_rpc.png" alt="RPC ã®ã¡ã«ããºã "  />
</p>

<p>
ãããã®åé¨ã¯ã©ã¹ã«ã¯ãIDL ã§å®£è¨ããã¤ã³ã¿ã¼ãã§ã¼ã¹ã®ãªã¢ã¼ã ãã­ã·ã¼ã¸ã£ ã³ã¼ã«ã管çããããã«å¿è¦ãªã³ã¼ãããã¹ã¦å«ã¾ãã¦ãã¾ããã©ã¡ãã®åé¨ã¯ã©ã¹ã {@link android.os.IBinder} ã¤ã³ã¿ã¼ãã§ã¼ã¹ãå®è£ãã¾ããä¸æ¹ã®åé¨ã¯ã©ã¹ã¯ãã­ã¼ã«ã«ã®ã·ã¹ãã ã§åé¨çã«ä½¿ç¨ãã¾ãããè¨è¿°ããã³ã¼ãã§ã¯ç¡è¦ãã¦ãæ§ãã¾ãããããä¸æ¹ã®åé¨ã¯ã©ã¹ã¯ã¹ã¿ãã¨å¼ã°ãã{@link android.os.Binder} ã¯ã©ã¹ãæ¡å¼µãã¾ããã¹ã¿ãã«ã¯ãIPCï¼ãã­ã»ã¹ééä¿¡ï¼å¼ã³åºããçºçãããããã®åé¨ã³ã¼ãã«å ããIDL ã§å®£è¨ãã RPC ã¤ã³ã¿ã¼ãã§ã¼ã¹åã®ã¡ã½ããã®å®£è¨ãå«ã¾ãã¾ãããããã®ã¡ã½ãããå®è£ããã«ã¯ãå³ã«ç¤ºãããã«ã¹ã¿ãããµãã¯ã©ã¹åãã¾ããï¼ã¤ã®åé¨ã¯ã©ã¹ã®ãã¡ã®ä¸æ¹ã¯ãã·ã¹ãã ãã­ã¼ã«ã«ãã¤åé¨çã«ä½¿ç¨ããã®ã§ãéçºèãè¨è¿°ããã³ã¼ãã§ã¯ç¡è¦ãã¦ãã¾ãã¾ããã... ãªã¢ã¼ãå´ã§ã¯ãå³ã®ããã«ã¹ã¿ãããµãã¯ã©ã¹åãã¦ããããã®ã¡ã½ãããå®è£ããå¿è¦ãããã¾ãã
</p>

<p>
	é常ããªã¢ã¼ã ãã­ã»ã¹ã¯ãµã¼ãã¹ã§ç®¡çãã¾ãããµã¼ãã¹ãªãããã­ã»ã¹ãä»ã®ãã­ã»ã¹ã¸ã®æ¥ç¶ã«é¢ããæå ±ãã·ã¹ãã ã«ä¼ãããã¨ãã§ããããã§ãããµã¼ãã¹ã«ã¯ã{@code aidl} ãã¼ã«ã§çæãããã¤ã³ã¿ã¼ãã§ã¼ã¹ ãã¡ã¤ã«ã¨ãRPC ã¡ã½ãããå®è£ããã¹ã¿ã ãµãã¯ã©ã¹ã®ä¸¡æ¹ãæããããã¨ã«ãªãã¾ãããµã¼ãã¹ã®ã¯ã©ã¤ã¢ã³ãã«ã¯ã{@code aidl} ãã¼ã«ã§çæãããã¤ã³ã¿ã¼ãã§ã¼ã¹ ãã¡ã¤ã«ã®ã¿ãæããã¾ãã
</p>

<p>
以ä¸ã«ããµã¼ãã¹ã¨ãã®ã¯ã©ã¤ã¢ã³ãã®éã®æ¥ç¶ãã©ã®ããã«è¨­å®ããããã示ãã¾ã:
</p>

<ul>
<li>ãµã¼ãã¹ã®ã¯ã©ã¤ã¢ã³ãï¼ã­ã¼ã«ã«å´ï¼ã«ã¯ <code>{@link android.content.ServiceConnection#onServiceConnected
onServiceConnected()}</code> ããã³<code>{@link android.content.ServiceConnection#onServiceDisconnected
onServiceDisconnected()}</code> ã¡ã½ãããå®è£ããã¦ããããããªã¢ã¼ã ãµã¼ãã¹ã¨ã®æ¥ç¶ã確ç«ãããã¨ããåæ­ãããã¨ãã«ã¯éç¥ãåãããã¨ãã§ãã¾ããéç¥ããã次第ã<code>{@link android.content.Context#bindService bindService()}</code> ãå¼ã³åºãã¦æ¥ç¶ã設å®ãã¾ãã
</li>  

<li> 
ãµã¼ãã¹ã® <code>{@link android.app.Service#onBind onBind()}</code> ã¡ã½ããã¯ãåãåã£ãã¤ã³ãã³ãï¼{@code bindService()} ã«æ¸¡ãããã¤ã³ãã³ãï¼ã«å¿ãã¦ãæ¥ç¶ãæ¿èªã¾ãã¯æå¦ããããã«å®è£ãã¾ããæ¥ç¶ãæ¿èªãããã¨ãæ¥ç¶ãæ¿èªããã®ã§ããã°ãã¹ã¿ã ãµãã¯ã©ã¹ã®ã¤ã³ã¹ã¿ã³ã¹ãè¿ãã¾ãã
</li>

<li>ãµã¼ãã¹ãæ¥ç¶ãæ¿èªããã¨ãAndroid ãã¯ã©ã¤ã¢ã³ãã® {@code onServiceConnected()} ã¡ã½ãããå¼ã³åºããIBinder ãªãã¸ã§ã¯ãï¼ãµã¼ãã¹ã管çããã¹ã¿ã ãµãã¯ã©ã¹ã®ãã­ã­ã·ï¼ã渡ãã¾ããã¯ã©ã¤ã¢ã³ãã¯ããã®ãã­ã­ã·ãä»ãã¦ãªã¢ã¼ããµã¼ãã¹ãå¼ã³åºããã¨ãã§ãã¾ãã  
</li>
</ul>

<p>
ããã§ã¯ã説æãç°¡åã«ãããããRPC ã¡ã«ããºã ã®ç´°ããç¹ã¯çç¥ãã¦ãã¾ãã詳ããã¯ã<a href="{@docRoot}guide/components/aidl.html">Designing a Remote Interface Using AIDL</a>ãããã³ {@link android.os.IBinder IBinder} ã¯ã©ã¹ã®èª¬æãã覧ãã ããã
</p>  


<h3 id="tsafe">ã¹ã¬ããã»ã¼ããªã¡ã½ãã</h3>

<p>
ç¶æ³ã«ãã£ã¦ã¯å®è£ããã¡ã½ãããè¤æ°ã®ã¹ã¬ããããå¼ã³åºããããã¨ããããããã¹ã¬ããã»ã¼ããªè¨è¿°ãå¿æããå¿è¦ãããã¾ãã
</p>

<p>
åã®ã»ã¯ã·ã§ã³ã§èª¬æãã RPC ã®ããã«ã¡ã½ããããªã¢ã¼ãã§å¼ã³åºããã¨ãã§ããå ´åã¯ããã®ãããªç¶æ³ãç¹ã«çºçãããããªãã¾ããIBinder ãªãã¸ã§ã¯ãã«å®è£ããã¦ããã¡ã½ããã IBinder ã¨åããã­ã»ã¹ããå¼ã³åºãã¨ããã®ã¡ã½ããã¯å¼ã³åºãå´ã®ã¹ã¬ããã§å®è¡ããã¾ããä¸æ¹ãå¥ã®ãã­ã»ã¹ããã¡ã½ãããå¼ã³åºããå ´åã¯ããã­ã»ã¹ã®ã¡ã¤ã³ ã¹ã¬ããã§ã¯ãªããIBinder ã¨åããã­ã»ã¹åã«ä¿æããã¦ããã¹ã¬ããã®ãã¼ã«ããé¸æãããã¹ã¬ããã§å®è¡ããã¾ãããã¨ãã°ããµã¼ãã¹ã® {@code onBind()} ã¡ã½ããã¯ãã®ãµã¼ãã¹ã®ãã­ã»ã¹ã®ã¡ã¤ã³ ã¹ã¬ããããå¼ã³åºãããã®ã«å¯¾ãã{@code onBind()} ããè¿ããããªãã¸ã§ã¯ãã«å®è£ããã¦ããã¡ã½ããï¼ãã¨ãã° RPC ã¡ã½ãããå®è£ããã¹ã¿ã ãµãã¯ã©ã¹ï¼ã¯ãã¼ã«åã®ã¹ã¬ããããå¼ã³åºããã¾ãããµã¼ãã¹ã«ã¯è¤æ°ã®ã¯ã©ã¤ã¢ã³ããå²ãå½ã¦ããã¨ãã§ãããããè¤æ°ã®ãã¼ã« ã¹ã¬ãããåã IBinder ã«åæã«å²ãå½ã¦ããã¨ãå¯è½ã§ãããããã£ã¦ãIBinder ã¡ã½ããã¯ã¹ã¬ããã»ã¼ãã«ãªãããã«å®è£ããå¿è¦ãããã¾ãã
</p>  

<p>
åæ§ã«ãã³ã³ãã³ã ãã­ãã¤ããå¥ã®ãã­ã»ã¹ããã®ãã¼ã¿ ãªã¯ã¨ã¹ããåãåããã¨ãã§ãã¾ããContentResolver ããã³ ContentProvider ã¯ã©ã¹ã¯ãã­ã»ã¹ééä¿¡ã®ç®¡çã®è©³ç´°ãé è½ãã¾ããããããã®ãªã¯ã¨ã¹ãã«å¿ç­ãã ContentProvider ã¡ã½ããï¼<code>{@link android.content.ContentProvider#query query()}</code>ã<code>{@link android.content.ContentProvider#insert insert()}</code>ã<code>{@link android.content.ContentProvider#delete delete()}</code>ã<code>{@link android.content.ContentProvider#update update()}</code>ãããã³ <code>{@link android.content.ContentProvider#getType getType()}</code> ã¡ã½ããï¼ã¯ããã­ã»ã¹ã®ã¡ã¤ã³ ã¹ã¬ããã§ã¯ãªããã³ã³ãã³ã ãã­ãã¤ãã®ãã­ã»ã¹åã®ã¹ã¬ããã®ãã¼ã«ããå¼ã³åºããã¾ãããããã®ã¡ã½ãããåæã«å¼ã³åºããã¨ã®ã§ããã¡ã½ããã®æ°ã«å¶éã¯ããã¾ããããããã£ã¦ããããã®ã¡ã½ãããã¹ã¬ããã»ã¼ãã«ãªãããã«å®è£ããå¿è¦ãããã¾ãã
</p> 


<h2 id="lcycles">ã³ã³ãã¼ãã³ãã®ã©ã¤ããµã¤ã¯ã«</h2>

<p>
ã¢ããªã±ã¼ã·ã§ã³ ã³ã³ãã¼ãã³ãã«ã¯ã©ã¤ããµã¤ã¯ã«ãããã¾ããã©ã¤ããµã¤ã¯ã«ã¯ãã¤ã³ãã³ãã¸å¿ç­ãããã¨ã§ã®ã¤ã³ã¹ã¿ã³ã¹åã§å§ã¾ãããã®ã¤ã³ã¹ã¿ã³ã¹ã®ç ´æ£ã§çµããã¾ãããã®éãã³ã³ãã¼ãã³ããã¢ã¯ãã£ããªã¨ãã¨ã¢ã¯ãã£ãã§ãªãã¨ãããããã¢ã¯ãã£ããã£ã§ããã°ã¦ã¼ã¶ã¼ããè¦ããã¨ãã¨è¦ããªãã¨ããããã¾ãããã®ã»ã¯ã·ã§ã³ã§ã¯ãã¢ã¯ãã£ããã£ããµã¼ãã¹ãããã³ãã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ãã®ã©ã¤ããµã¤ã¯ã«ã«ã¤ãã¦èª¬æãã¾ããå·ä½çã«ã¯ããããããã©ã¤ãã¿ã¤ã ã®éã«åããã¨ã®ã§ããç¶æãç¶æã®é·ç§»ãéç¥ããæ¹æ³ãããã³ãããã®ç¶æããã³ã³ãã¼ãã³ããå®è¡ãã¦ãããã­ã»ã¹ãçµäºãããããããã¤ã³ã¹ã¿ã³ã¹ãç ´æ£ããããããå¯è½æ§ã¸ã®å½±é¿ãªã©ã«ã¤ãã¦èª¬æãã¾ãã
</p> 


<h3 id="actlife">ã¢ã¯ãã£ããã£ã®ã©ã¤ããµã¤ã¯ã«</h3>

<p>ã¢ã¯ãã£ããã£ã¯ãåºæ¬çã«ä»¥ä¸ã® 3 ã¤ã®ç¶æãåãã¾ã:</p>

<ul>
<li> ç¶æãã¢ã¯ãã£ãã¾ãã¯å®è¡ä¸­ã®ã¢ã¯ãã£ããã£ã¯ãç»é¢ã®ãã©ã¢ã°ã©ã¦ã³ãã«è¡¨ç¤ºããã¦ããï¼ã¤ã¾ãç¾å¨ã®ã¿ã¹ã¯ã®ã¢ã¯ãã£ãã㣠ã¹ã¿ãã¯ã®æä¸ä½ã«ããï¼ã¢ã¯ãã£ããã£ã§ãã<em></em><em></em>ããããã¦ã¼ã¶ã¼ã®ã¢ã¯ã·ã§ã³ã®ç¦ç¹ã¨ãªã£ã¦ããã¢ã¯ãã£ããã£ã§ãã</li>

<li><p>ç¶æãä¸æåæ­¢ã®ã¢ã¯ãã£ããã£ã¯ãã¦ã¼ã¶ã¼ã®ã¢ã¯ã·ã§ã³ã®ç¦ç¹ããå¤ãã¦ãã¾ãããã¾ã ã¦ã¼ã¶ã¼ããè¦ããã¨ã®ã§ããã¢ã¯ãã£ããã£ã§ãã<em></em>ã¤ã¾ãããããããåé¢ã«ä»ã®ã¢ã¯ãã£ããã£ã表示ããã¦ãã¾ããããã®ã¢ã¯ãã£ããã£ãéæãå¨ç»é¢è¡¨ç¤ºã§ãªããã®ã©ã¡ããã§ãä¸æåæ­¢ãã¦ããã¢ã¯ãã£ããã£ã®ä¸é¨ãè¦ãã¦ããç¶æã§ããä¸æåæ­¢ãã¦ããã¢ã¯ãã£ããã£ã¯ãå®å¨ã«åä½ãã¦ãã¾ãï¼ãã¹ã¦ã®ç¶æãã¡ã³ãã¼æå ±ã¯ä¿æããã¦ãããã¦ã£ã³ã㦠ããã¼ã¸ã£ã«ã¢ã¿ãããããã¾ã¾ã«ãªã£ã¦ãã¾ãï¼ããã ããã¡ã¢ãªã極端ã«ä¸è¶³ããå ´åã¯ãã·ã¹ãã ã«ãã£ã¦å¼·å¶çµäºãããããå¯è½æ§ãããã¾ãã</p></li>

<li><p>ç¶æãåæ­¢ã®ã¢ã¯ãã£ããã£ã¯ãå¥ã®ã¢ã¯ãã£ããã£ã«é ããã¦å®å¨ã«è¦ããªããªã£ãã¢ã¯ãã£ããã£ã§ãã<em></em>ãã¹ã¦ã®ç¶æã¨ã¡ã³ãã¼æå ±ã¯ã¾ã ä¿æãã¦ãã¾ããããããããã¦ã¼ã¶ã¼ã«å¯¾ãã¦è¡¨ç¤ºããã¦ããªããããä»ã§ã¡ã¢ãªãå¿è¦ãªå ´åã¯å¼·å¶çµäºãããããå¯è½æ§ãé«ãã¢ã¯ãã£ããã£ã§ãã</p></li>
</ul>

<p>
ã·ã¹ãã ãä¸æåæ­¢ã¾ãã¯åæ­¢ãã¦ããã¢ã¯ãã£ããã£ãã¡ã¢ãªããåé¤ããå ´åã¯ãã¢ã¯ãã£ããã£ã® {@link android.app.Activity#finish finish()} ã¡ã½ãããå¼ã³åºãã¦çµäºãè¦æ±ããããåç´ã®ãã®ãã­ã»ã¹ãå¼·å¶çµäºãã¾ãããã®ã¢ã¯ãã£ããã£ãããä¸åº¦ã¦ã¼ã¶ã¼ã«è¡¨ç¤ºããéã¯ãå®å¨ã«åèµ·åãã¦ä»¥åã®ç¶æã«å¾©åããå¿è¦ãããã¾ãã
</p>

<p>
ã¢ã¯ãã£ããã£ãããç¶æããå¥ã®ç¶æã«é·ç§»ããã¨ã以ä¸ã® protected ã¡ã½ããã«å¯¾ããå¼ã³åºãã«ãã£ã¦å¤æ´ãéç¥ããã¾ã:
</p>

<p style="margin-left: 2em">{@code void onCreate(Bundle <i>savedInstanceState</i>)} <br/>{@code void onStart()} <br/>{@code void onRestart()} <br/>{@code void onResume()} <br/>{@code void onPause()} <br/>{@code void onStop()} <br/>{@code void onDestroy()}</p>

<p>
ãããã®ã¡ã½ããã¯ãã¹ã¦ãç¶æãå¤åããã¨ãã«é©åãªå¦çãè¡ãããã«ãªã¼ãã¼ã©ã¤ãã§ããããã¯ã§ãããªãã¸ã§ã¯ããåãã¦ã¤ã³ã¹ã¿ã³ã¹åãããã¨ãã«åæ設å®ãè¡ãããããã¹ã¦ã®ã¢ã¯ãã£ããã£ã«ã¯ <code>{@link android.app.Activity#onCreate onCreate()}</code> ãå®è£ããå¿è¦ãããã¾ããå¤ãã®ã¢ã¯ãã£ããã£ã«ã¯ããã¼ã¿ã®å¤æ´ãã³ãããããããã® <code>{@link android.app.Activity#onPause onPause()}</code> ãå®è£ãã¾ãããããå®è£ããªãå ´åã¯ãä½ããã®æ¹æ³ã§ã¦ã¼ã¶ã¼ã¨ã®å¯¾è©±ãåæ­¢ã§ããããã«ãã¦ããå¿è¦ãããã¾ãã
</p>

<div class="sidebox-wrapper">
<div class="sidebox">
<h2>ã¹ã¼ãã¼ã¯ã©ã¹ã®å¼ã³åºã</h2>
<p>
ã©ã®ã¢ã¯ãã£ãã㣠ã©ã¤ããµã¤ã¯ã« ã¡ã½ããã®å®è£ã§ããå¿ãæåã«ã¹ã¼ãã¼ã¯ã©ã¹ ãã¼ã¸ã§ã³ãå¼ã³åºãå¿è¦ãããã¾ãã次ã«ä¾ã示ãã¾ã:
</p>

<pre>protected void onPause() {
    super.onPause();
    . . .
}</pre>
</div>
</div> 


<p>
ããã 7 ã¤ã®ã¡ã½ããã使ç¨ããã¨ãã¢ã¯ãã£ããã£ã®ã©ã¤ããµã¤ã¯ã«å¨ä½ãå®ç¾©ã§ãã¾ããããããå®è£ãããã¨ã§ããã¹ãããã 3 ã¤ã®ã«ã¼ããããªãã¢ã¯ãã£ããã£ã®ã©ã¤ããµã¤ã¯ã«ãç£è¦ã§ãã¾ã: 
</p> 

<ul>
<li>ã¢ã¯ãã£ããã£ã®<b>ã©ã¤ãã¿ã¤ã å¨ä½</b>ã¯ã<code>{@link android.app.Activity#onCreate onCreate()}</code> ãåãã¦å¼ã³åºãããã¨ãã«å§ã¾ããæå¾ã« <code>{@link android.app.Activity#onDestroy}</code> ãå¼ã³åºãããã¨ãã«çµäºãã¾ããã¢ã¯ãã£ããã£ã¯ã{@code onCreate()} ã§ãå¨ä½çããªç¶æã®ãã¹ã¦ã®åæ設å®ãè¡ãã{@code onDestroy()} æ®ã£ã¦ãããªã½ã¼ã¹ããã¹ã¦è§£æ¾ãã¾ãããã¨ãã°ããããã¯ã¼ã¯ããã®ãã¼ã¿ã®ãã¦ã³ã­ã¼ããããã¯ã°ã©ã¦ã³ãã§å®è¡ããã¹ã¬ããã¯ã{@code onCreate()} ã§ä½æããã{@code onDestroy()} ã§åæ­¢ãã¾ãã</li>

<li><p>ã¢ã¯ãã£ããã£ã®<b>å¯è¦ã©ã¤ãã¿ã¤ã </b>ã¯ã<code>{@link android.app.Activity#onStart onStart()}</code> ã®å¼ã³åºãã§å§ã¾ãã対å¿ãã <code>{@link android.app.Activity#onStop onStop()}</code> ã®å¼ã³åºãã§çµäºãã¾ãããã®ã©ã¤ãã¿ã¤ã ã®éã¯ãã¦ã¼ã¶ã¼ãç»é¢ä¸ã§ãã®ã¢ã¯ãã£ããã£ãè¦ããã¨ãã§ãã¾ãããã ããã¢ã¯ãã£ããã£ããã©ã¢ã°ã©ã¦ã³ãã«ãªãå ´åããã¦ã¼ã¶ã¼ã¨å¯¾è©±ãã¦ããªãå ´åãããã¾ãããããã® 2 ã¤ã®ã¡ã½ããã®éã¯ãã¦ã¼ã¶ã¼ã«å¯¾ãã¦ã¢ã¯ãã£ããã£ã表示ããããã«å¿è¦ãªãªã½ã¼ã¹ã確ä¿ã§ãã¾ãããã¨ãã°ã{@code onStart()} 㧠{@link android.content.BroadcastReceiver} ãç»é²ã㦠UI ã«å½±é¿ããå¤åãç£è¦ãã表示ãã¦ããã¢ã¯ãã£ããã£ãã¦ã¼ã¶ã¼ããè¦ããªããªã£ãã {@code onStop()} ã§ç»é²ã解é¤ã§ãã¾ãã{@code onStart()} ããã³ {@code onStop()} ã¡ã½ããã¯ãã¢ã¯ãã£ããã£ãã¦ã¼ã¶ã¼ããè¦ãé ããããã³ã«ç¹°ãè¿ãå¼ã³åºããã¨ãã§ãã¾ãã</p></li>

<li><p>ã¢ã¯ãã£ããã£ã®<b>ãã©ã¢ã°ã©ã¦ã³ã ã©ã¤ãã¿ã¤ã </b>ã¯ã<code>{@link android.app.Activity#onResume onResume()}</code> ã®å¼ã³åºãã§å§ã¾ãã対å¿ãã <code>{@link android.app.Activity#onPause onPause()}</code> ã®å¼ã³åºãã§çµäºãã¾ãããã©ã¢ã°ã©ã¦ã³ã ã©ã³ã¿ã¤ã ã®éã¯ããã®ã¢ã¯ãã£ããã£ãä»ã®ã©ã®ã¢ã¯ãã£ããã£ãããåé¢ã«è¡¨ç¤ºãããã¦ã¼ã¶ã¼ã¨å¯¾è©±ãã¦ãã¾ããã¢ã¯ãã£ããã£ã¯ãä¸æåæ­¢ç¶æã¨åéç¶æã®éãé »ç¹ã«é·ç§»ãã¾ãããã¨ãã°ãããã¤ã¹ãã¹ãªã¼ãç¶æã«ãªãã¨ããæ°ããã¢ã¯ãã£ããã£ãéå§ããã¨ãã«ã¯ {@code onPause()} ãå¼ã³åºãããã¢ã¯ãã£ããã£ã®çµæãæ°ããã¤ã³ãã³ããå±ããã¨ãã«ã¯ {@code onResume()} ãå¼ã³åºããã¾ãããããã£ã¦ããããã®ã¡ã½ãããè¨è¿°ããéã¯ãã§ããã ã軽éåãã¦ããå¿è¦ãããã¾ãã</p></li>
</ul>

<p>
次ã®å³ã«ããããã®ã«ã¼ãã¨ã¢ã¯ãã£ããã£ã®é·ç§»çµè·¯ã示ãã¾ããè²ã®ä»ããæ¥åã¯ãã¢ã¯ãã£ããã£ãåããã¨ã®ã§ãã主ãªç¶æã§ããé·æ¹å½¢ã¯ãã¢ã¯ãã£ããã£ãç¶æéãé·ç§»ããã¨ãã«å¦çãå®è¡ããããã«å®è£ã§ããã³ã¼ã«ãã㯠ã¡ã½ããã表ãã¾ãã
<p>

<p style="margin-left: 2em"><img src="{@docRoot}images/activity_lifecycle.png"
alt="Android ã®ã¢ã¯ãã£ãã㣠ã©ã¤ããµã¤ã¯ã«ã®ç¶æé·ç§»å³"  /></p>  
  
<p>
次ã®è¡¨ã§ã¯ãåã¡ã½ããã«ã¤ãã¦è©³ãã説æããã©ã¤ããµã¤ã¯ã«å¨ä½ã«ãããä½ç½®ä»ãã示ãã¾ã:
</p>

<table border="2" width="85%" frame="hsides" rules="rows">
<colgroup align="left" span="3"></colgroup>
<colgroup align="left"></colgroup>
<colgroup align="center"></colgroup>
<colgroup align="center"></colgroup>

<thead>
<tr><th colspan="3">ã¡ã½ãã</th> <th>説æ</th> <th>å¼·å¶çµäº</th> <th>次</th></tr>
</thead>

<tbody>
<tr>
  <td colspan="3" align="left"><code>{@link android.app.Activity#onCreate onCreate()}</code></td>
  <td>ã¢ã¯ãã£ããã£ãåãã¦ä½æãããã¨ãã«å¼ã³åºããã¾ããé常ã®éçãªè¨­å®ï¼ãã¥ã¼ã®ä½æããªã¹ãã¸ã®ãã¼ã¿ã®ãã¤ã³ããªã©ï¼ã¯ããã¹ã¦ã®ãã®ã¡ã½ããã§è¡ãå¿è¦ãããã¾ãããã®ã¢ã¯ãã£ããã£ã®      以åã®ç¶æãä¿å­ããã¦ããå ´åããã®ã¡ã½ããã«ã¯ãã®ç¶æãä¿æãã¦ãã Bundle ãªãã¸ã§ã¯ããå¼æ°ã¨ãã¦ï¼è©³ããã¯ãå¾è¿°ã®<a href="#actstate">ã¢ã¯ãã£ããã£ã®ç¶æã®ä¿å­</a>ãã覧ãã ããï¼ã
      <p>ãã®å¾ã«ã¯ãå¿ã {@code onStart()} ãå¼ã³åºããã¾ãã</p></td>
  <td align="center">ä¸å¯</td>
      <td align="center">{@code onStart()}</td>
</tr>

<tr>
   <td rowspan="5" style="border-left: none; border-right: none;">&nbsp;&nbsp;&nbsp;&nbsp;</td>
   <td colspan="2" align="left"><code>{@link android.app.Activity#onRestart 
onRestart()}</code></td>
   <td>ã¢ã¯ãã£ããã£ãåæ­¢ããå¾ããããããä¸åº¦éå§ããç´åã«å¼ã³åºããã¾ãã
       <p>ãã®å¾ã«ã¯ãå¿ã {@code onStart()} ãå¼ã³åºããã¾ãã</p></td>
   <td align="center">ä¸å¯</td>
   <td align="center">{@code onStart()}</td>
</tr>

<tr>
   <td colspan="2" align="left"><code>{@link android.app.Activity#onStart onStart()}</code></td>
   <td>ã¢ã¯ãã£ããã£ãã¦ã¼ã¶ã¼ããè¦ããããã«ãªãç´åã«å¼ã³åºããã¾ãã
       <p>ãã®å¾ãã¢ã¯ãã£ããã£ããã©ã¢ã°ã©ã¦ã³ãã«è¡¨ç¤ºãããå ´å㯠{@code onResume()} ããä»ã®ã¢ã¯ãã£ããã£ã®å¾ãã«é ããå ´å㯠{@code onStop()} ãå¼ã³åºããã¾ãã</p></td>
    <td align="center">ä¸å¯</td>
    <td align="center">{@code onResume()} <br/>ã¾ãã¯<br/>{@code onStop()}</td>
</tr>

<tr>
   <td rowspan="2" style="border-left: none;">&nbsp;&nbsp;&nbsp;&nbsp;</td>
   <td align="left"><code>{@link android.app.Activity#onResume onResume()}</code></td>
   <td>ã¢ã¯ãã£ããã£ãã¦ã¼ã¶ã¼ã¨ã®å¯¾è©±ãéå§ããç´åã«å¼ã³åºããã¾ãããã®æç¹ã§ãã¢ã¯ãã£ããã£ã¯ã¢ã¯ãã£ãã㣠ã¹ã¿ãã¯ã®æä¸ä½ã«ãããã¦ã¼ã¶ã¼ããã®å¥åã¯ãã®ã¢ã¯ãã£ããã£ã«å¯¾ãã¦è¡ããã¾ãã
       <p>ãã®å¾ã«ã¯ãå¿ã {@code onPause()} ãå¼ã³åºããã¾ãã</p></td>
   <td align="center">ä¸å¯</td>
   <td align="center">{@code onPause()}</td>
</tr>

<tr>
   <td align="left"><code>{@link android.app.Activity#onPause onPause()}</code></td>
   <td>ã·ã¹ãã ãå¥ã®ã¢ã¯ãã£ããã£ãéå§ãããã¨ãã¦ããã¨ãã«å¼ã³åºããã¾ãããã®ã¡ã½ããã¯ãä¿å­ããã¦ããªãå¤æ´ãæ°¸ç¶ãã¼ã¿ã«ã³ãããããå ´åããã¢ãã¡ã¼ã·ã§ã³ã®ããã« CPU ã大éã«æ¶è²»ããå¦çãåæ­¢ããå ´åã«ä½¿ç¨ããã®ãä¸è¬çã§ãããã®ã¡ã½ãããçµäºããã¾ã§ã¯æ¬¡ã®ã¢ã¯ãã£ããã£ãéå§ããããªããããã§ããéãç­æéã§å®è¡ã§ããããã«ãã¦ããå¿è¦ãããã¾ãã
       <p>ãã®å¾ãã¢ã¯ãã£ããã£ããã©ã¢ã°ã©ã¦ã³ãã«æ»ã£ãå ´å㯠{@code onResume()} ããã¦ã¼ã¶ã¼ããè¦ããªããªã£ãå ´å㯠{@code onStop()} ãå¼ã³åºããã¾ãã</td>
   <td align="center"><strong style="color:#800000">å¯è½</strong></td>
   <td align="center">{@code onResume()} <br/>ã¾ãã¯<br/>{@code onStop()}</td>
</tr>

<tr>
   <td colspan="2" align="left"><code>{@link android.app.Activity#onStop onStop()}</code></td>
   <td>ã¢ã¯ãã£ããã£ãã¦ã¼ã¶ã¼ããè¦ããªããªã£ãã¨ãã«å¼ã³åºããã¾ããè¦ããªããªãç¶æ³ã¨ãã¦ã¯ãã¢ã¯ãã£ããã£ãç ´æ£ãããå ´åããåéãããå¥ã®ã¢ã¯ãã£ããã£ï¼æ¢å­ãæ°è¦ããåããï¼ã«ãã£ã¦é ãããå ´åãèãããã¾ãã 
       <p>ãã®å¾ãã¢ã¯ãã£ããã£ãã¦ã¼ã¶ã¼ã¨ã®å¯¾è©±ã«æ»ã£ãå ´å㯠{@code onRestart()} ããã¢ã¯ãã£ããã£ãå®å¨ã«çµäºããå ´å㯠{@code onDestroy()} ãå¼ã³åºããã¾ãã</p></td>
   <td align="center"><strong style="color:#800000">å¯è½</strong></td>
   <td align="center">{@code onRestart()} <br/>ã¾ãã¯<br/>{@code onDestroy()}</td>
</tr>

<tr>
   <td colspan="3" align="left"><code>{@link android.app.Activity#onDestroy 
onDestroy()}</code></td>
   <td>ã¢ã¯ãã£ããã£ãç ´æ£ãããåã«å¼ã³åºããã¾ããããããã¢ã¯ãã£ããã£ãåãåãæå¾ã®å¼ã³åºãã¨ãªãã¾ãããã®ã¡ã½ãããå¼ã³åºãããç¶æ³ã¨ãã¦ã¯ãã¢ã¯ãã£ããã£ãå®äºããå ´åï¼<code>{@link android.app.Activity#finish 
       finish()}</code> ãå¼ã³åºãããã¨ãï¼ããã·ã¹ãã ãé åã確ä¿ããããã«ä¸æçã«ãã®ã¢ã¯ãã£ããã£ã®ã¤ã³ã¹ã¿ã³ã¹ãç ´æ£ããå ´åãèãããã¾ãããããã® 2 ã¤ã®ç¶æ³ã¯ã<code>{@link
       android.app.Activity#isFinishing isFinishing()}</code> ã¡ã½ããã使ç¨ãã¦è­å¥ã§ãã¾ãã</td>
   <td align="center"><strong style="color:#800000">å¯è½</strong></td>
   <td align="center"><em>ãªã</em></td>
</tr>
</tbody>
</table>

<p>
表ã®<b>å¼·å¶çµäº</b>åã«æ³¨ç®ãã¦ãã ããããã®åã¯ãã¡ã½ãããçµäºããå¾ã§ããã°ãã·ã¹ãã ãã¢ã¯ãã£ããã£ã®ã³ã¼ãã®å¥ã®è¡ãå®è¡ãããã¨ãªããã¤ã§ãã¢ã¯ãã£ããã£ãå®è¡ãã¦ãããã­ã»ã¹ãå¼·å¶çµäºã§ãããã©ããã示ãã¦ãã¾ãã<em></em>{@code onPause()}ã{@code onStop()}ãããã³ {@code onDestroy()} ã¡ã½ããã® 3 ã¤ã¯ãå¯è½ãã¨ãªã£ã¦ãã¾ãã1 çªç®ã«æãã {@code onPause()} ã ãã¯ããã­ã»ã¹ãå¼·å¶çµäºããåã«å¿ãå¼ã³åºããã¾ãã{@code onStop()} 㨠{@code onDestroy()} ã¯ãå¿ãå¼ã³åºãããã¨ã¯éãã¾ããããããã£ã¦ãæ°¸ç¶ãã¼ã¿ï¼ãã¨ãã°ã¦ã¼ã¶ã¼ã«ããç·¨éï¼ãã¹ãã¬ã¼ã¸ã«æ¸ãè¾¼ãé㯠{@code onPause()} ã使ç¨ããå¿è¦ãããã¾ãã
</p>

<p>
<b>å¼·å¶çµäº</b>åããä¸å¯ãã«ãªã£ã¦ããã¡ã½ããã¯ãããããå¼ã³åºãããç¬éãããã¢ã¯ãã£ããã£ãå®è¡ãã¦ãããã­ã»ã¹ãä¿è­·ãã¦å¼·å¶çµäºãããªãããã«ãã¾ãããããã£ã¦ãã¢ã¯ãã£ããã£ãå¼·å¶çµäºå¯è½ãªç¶æã«ããã®ã¯ããã¨ãã° {@code onPause()} ãè¿ããã¦ãã {@code onResume()} ãå¼ã³åºãããã¾ã§ã®éã¨ãããã¨ã§ãããã®å¾ã¯ãããä¸åº¦ {@code onPause()} ãè¿ãããã¾ã§ãå¼·å¶çµäºã§ããç¶æã«ã¯æ»ãã¾ããã
</p>

<p>
å¾è¿°ã®<a href="#proclife">ãã­ã»ã¹ã¨ã©ã¤ããµã¤ã¯ã«</a>ã®ã»ã¯ã·ã§ã³ã§è©³ãã説æãã¾ãããããã§ã®å®ç¾©ã§æè¡çã«ã¯ãå¼·å¶çµäºå¯è½ãã§ãªãã¢ã¯ãã£ããã£ã§ããã·ã¹ãã ã«ãã£ã¦å¼·å¶çµäºãããããå¯è½æ§ã¯ããã¾ãããä»ã«å©ç¨ã§ãããªã½ã¼ã¹ããªããªã©ã極端ã«æ¥ãè¦ããå ´åã«éããã¾ãã
</p>


<h4 id="actstate">ã¢ã¯ãã£ããã£ã®ç¶æã®ä¿å­</h4>

<p>
ã¡ã¢ãªä¸è¶³ãè£ãããã«ã¦ã¼ã¶ã¼ã§ã¯ãªãã·ã¹ãã ãã¢ã¯ãã£ããã£ãçµäºãããå ´åã«ã¯ï¼ã¦ã¼ã¶ããã®ã¢ã¯ãã£ããã£ã«æ»ã£ãã¨ãã«ã以åã®ç¶æã®ã¾ã¾ã§ãããã¨ãæå¾ããã§ãããã
</p>

<p>
ã¢ã¯ãã£ããã£ãå¼·å¶çµäºãããããåã®ç¶æãä¿å­ãã¦ããããå ´åã¯ãã¢ã¯ãã£ããã£ã« <code>{@link android.app.Activity#onSaveInstanceState 
onSaveInstanceState()}</code> ã¡ã½ãããå®è£ãã¾ãããã®ã¡ã½ããã¯ãã¢ã¯ãã£ããã£ãç ´æ£ãããããç¶æã«ãªãåï¼ã¤ã¾ã {@code onPause()} ãå¼ã³åºãããåï¼ã«å¼ã³åºããã¾ãããã®éãã¢ã¯ãã£ããã£ã®åçãªç¶æãåå/å¤ãã¢ã¨ãã¦è¨é²ã§ãã {@link android.os.Bundle} ãªãã¸ã§ã¯ãã渡ããã¾ããã¢ã¯ãã£ããã£ãããä¸åº¦éå§ãããã¨ãBundle 㯠{@code onCreate()} ã ãã§ãªãã{@code onStart()} ã®å¾ã«å¼ã³åºããã <code>{@link 
android.app.Activity#onRestoreInstanceState onRestoreInstanceState()}</code> ã¡ã½ããã«ã渡ãããä¿å­ããã¦ããç¶æããã®ã©ã¡ããã¾ãã¯ä¸¡æ¹ã§å¾©åã§ãã¾ãã
</p>

<p>
{@code onSaveInstanceState()} ããã³ {@code onRestoreInstanceState()} ã¡ã½ããã¯ãããã¾ã§ã«èª¬æãã {@code onPause()} ãªã©ã¨ã¯ç°ãªããã©ã¤ããµã¤ã¯ã« ã¡ã½ããã§ã¯ããã¾ããããããã®ã¡ã½ããã¯ã常ã«å¼ã³åºãããããã§ã¯ããã¾ããããã¨ãã°ã{@code onSaveInstanceState()} ã¯ãã·ã¹ãã ã«ãã£ã¦ã¢ã¯ãã£ããã£ãç ´æ£ããããç¶æã«ãããåã«ã¯å¼ã³åºããã¾ãããã¦ã¼ã¶ã¼ã®ã¢ã¯ã·ã§ã³ï¼ãã¨ãã° [[]æ»ã] ã­ã¼ï¼ã«ãã£ã¦ã¤ã³ã¹ã¿ã³ã¹ãå®éã«ç ´æ£ãããã¨ãã«ã¯å¼ã³åºããã¾ããããã®ãããªå ´åã¯ãã¦ã¼ã¶ã¼ããã®ã¢ã¯ãã£ããã£ã«æ»ããã¨ãæ³å®ããå¿è¦ã¯ãªããããç¶æãä¿å­ããçç±ããªãã®ã§ãã
</p>

<p>
{@code onSaveInstanceState()} ã¯å¸¸ã«å¼ã³åºãããã¨ã¯éããªããããã¢ã¯ãã£ããã£ã®ä¸æçãªç¶æãè¨é²ããç®çã®ã¿ã«ä½¿ç¨ããæ°¸ç¶ãã¼ã¿ã®æ ¼ç´ã«ã¯ä½¿ç¨ããªãããã«ãã¦ãã ããããã®ç®çã«ã¯ {@code onPause()} ã使ç¨ãã¾ãã
</p>


<h4 id="coordact">ã¢ã¯ãã£ããã£ã®å調</h4>

<p>
ããã¢ã¯ãã£ããã£ãå¥ã®ã¢ã¯ãã£ããã£ãéå§ããã¨ã両æ¹ã®ã¢ã¯ãã£ããã£ã®ã©ã¤ããµã¤ã¯ã«ç¶æãé·ç§»ãã¾ããä¸æ¹ãä¸æåæ­¢ã¾ãã¯åæ­¢ããããä¸æ¹ãéå§ããã¾ããå ´åã«ãã£ã¦ã¯ããããã®å調ãããå¿è¦ãããã¾ãã
</p>

<p>
ã©ã¤ããµã¤ã¯ã«ã®ã³ã¼ã«ããã¯ã®é åºã¯æ確ã«å®ç¾©ããã¦ãããç¹ã« 2 ã¤ã®ã¢ã¯ãã£ããã£ãåããã­ã»ã¹åã«å­å¨ããå ´åã¯æ¬¡ã®ããã«ãªãã¾ã:
</p>

<ol>
<li>ç¾å¨ã®ã¢ã¯ãã£ããã£ã® {@code onPause()} ã¡ã½ãããå¼ã³åºããã¾ãã</li>

<li>ç¶ãã¦ãéå§ãããã¢ã¯ãã£ããã£ã® {@code onCreate()}ã{@code onStart()}ãããã³ {@code onResume()} ã¡ã½ãããé çªã«å¼ã³åºããã¾ãã</li>

<li>ãã®å¾ãéå§ãããã¢ã¯ãã£ããã£ãç»é¢ä¸ã§è¦ããªããªãã¨ããã® {@code onStop()} ã¡ã½ãããå¼ã³åºããã¾ãã</li>
</ol>


<h3 id="servlife">ãµã¼ãã¹ã®ã©ã¤ããµã¤ã¯ã«</h3>

<p>
ãµã¼ãã¹ã¯ã以ä¸ã® 2 ã¤ã®æ¹æ³ã§ä½¿ç¨ã§ãã¾ã:
</p>

<ul>
<li>ãã£ããéå§ããããåæ­¢ãããããï¼ã¾ãã¯èªãåæ­¢ããï¼ã¾ã§å®è¡ãç¶ãããã¨ãã§ãã¾ãããã®ã¢ã¼ãã§ã¯ã<code>{@link android.content.Context#startService Context.startService()}</code> ãå¼ã³åºããã¦éå§ãã<code>{@link android.content.Context#stopService Context.stopService()}</code> å¼ã³åºããã¦åæ­¢ãã¾ãããµã¼ãã¹èªä½ã <code>{@link android.app.Service#stopSelf() Service.stopSelf()}</code> ã¾ã㯠<code>{@link android.app.Service#stopSelfResult Service.stopSelfResult()}</code> ãå¼ã³åºãã¦åæ­¢ãããã¨ãã§ãã¾ãããµã¼ãã¹ã®éå§æã« {@code startService()} ãä½åº¦å¼ã³åºãããã¨ãã¦ãã{@code stopService()} ãä¸åº¦å¼ã³åºãã°ãµã¼ãã¹ã¯åæ­¢ãã¾ãã</li>

<li><p>ãµã¼ãã¹ã§å®ç¾©ããã¦ããã¤ã³ã¿ã¼ãã§ã¼ã¹ãã¨ã¯ã¹ãã¼ããããããä»ãã¦ãã­ã°ã©ã çã«æä½ã§ãã¾ããã¯ã©ã¤ã¢ã³ããã Service ãªãã¸ã§ã¯ãã¸ã®æ¥ç¶ã確ç«ãããã®æ¥ç¶ã使ç¨ãã¦ãµã¼ãã¹ã«ã¢ã¯ã»ã¹ãã¾ããæ¥ç¶ã¯ã<code>{@link android.content.Context#bindService Context.bindService()}</code> ãå¼ã³åºãã¦ç¢ºç«ãã<code>{@link android.content.Context#unbindService Context.unbindService()}</code> ã§ãµã¼ãã¹ãéå§ãã¾ããè¤æ°ã®ã¯ã©ã¤ã¢ã³ããåããµã¼ãã¹ã«ãã¤ã³ããããã¨ãå¯è½ã§ãããµã¼ãã¹ãã¾ã éå§ããã¦ããªãã£ãå ´åã¯ï¼å¿è¦ã«å¿ã㦠{@code bindService()} ã§éå§ã§ãã¾ãã
</p></li>
</ul>

<p>
ããã 2 ã¤ã®ã¢ã¼ãã¯ãå®å¨ã«åé¢ããã¦ããããã§ã¯ããã¾ããã{@code startService()} ã§éå§ããããµã¼ãã¹ã«ãã¤ã³ããããã¨ãå¯è½ã§ãããã¨ãã°ãåçããæ²ãæå®ãã Intent ãªãã¸ã§ã¯ã㧠{@code startService()} ãå¼ã³åºãã¦é³æ¥½åçãµã¼ãã¹ãéå§ããã¨ãã¾ãããã®å¾ããã¨ãã°ã¦ã¼ã¶ã¼ããã¬ã¼ã¤ã¼ãæä½ãããå ´åãåç中ã®æ²ã«é¢ããæå ±ãå¥æãããå ´åã«ã¯ãã¢ã¯ãã£ããã£ãã {@code bindService()} ãå¼ã³åºãã¦ãµã¼ãã¹ã¨ã®æ¥ç¶ã確ç«ã§ãã¾ãããã®ãããªå ´åãæå¾ã®ãã¤ã³ããéããããã¾ã§ã¯ã{@code stopService()} ãå¼ã³åºãã¦ããµã¼ãã¹ã¯åæ­¢ãã¾ããã
</p>

<p>
ã¢ã¯ãã£ããã£ã¨åæ§ããµã¼ãã¹ã«ãã©ã¤ããµã¤ã¯ã« ã¡ã½ããããããããããå®è£ãããã¨ã§ãµã¼ãã¹ã®ç¶æã®å¤åãç£è¦ã§ãã¾ãããã ããprotected ã§ã¯ãªã public ã§ã以ä¸ã® 3 ã¤ããããã¾ãã:
</p>

<p style="margin-left: 2em">{@code void onCreate()} <br/>{@code void onStart(Intent <i>intent</i>)} <br/>{@code void onDestroy()}</p>

<p>
ãããã®ã¡ã½ãããå®è£ãããã¨ã§ããã¹ãããã 2 ã¤ã®ã«ã¼ããããªããµã¼ãã¹ã®ã©ã¤ããµã¤ã¯ã«ãç£è¦ã§ãã¾ã:
</p>

<ul>
<li>ãµã¼ãã¹ã®<b>ã©ã¤ãã¿ã¤ã å¨ä½</b>ã¯ã<code>{@link android.app.Service#onCreate onCreate()}</code> ãå¼ã³åºãããã¨ãã«å§ã¾ãã<code>{@link android.app.Service#onDestroy}</code> çµäºããã¨ãã«çµããã¾ããã¢ã¯ãã£ããã£ã¨åããããµã¼ãã¹ã {@code onCreate()} ã§åæ設å®ãè¡ãã{@code onDestroy()} ã§æ®ã£ã¦ãããªã½ã¼ã¹ããã¹ã¦è§£æ¾ãã¾ãããã¨ãã°ãé³æ¥½åçãµã¼ãã¹ã§ããã°ã{@code onCreate()} ã§é³æ¥½ãåçããã¹ã¬ãããä½æãã{@code onDestroy()} ã§ãã®ã¹ã¬ãããåæ­¢ã§ãã¾ãã</li>

<li><p>ãµã¼ãã¹ã®<b>ã¢ã¯ãã£ã ã©ã¤ãã¿ã¤ã </b>ã¯ã<code>{@link android.app.Service#onStart onStart()}</code> ãå¼ã³åºããã¨ãã«å§ã¾ãã¾ãããã®ã¡ã½ããã«ã¯ã{@code startService()} ã«æ¸¡ããã Intent ãªãã¸ã§ã¯ãã渡ããã¾ããé³æ¥½åçãµã¼ãã¹ã¯ããã® Intent ãªãã¸ã§ã¯ããã¿ã¦æ²ãè¦ã¤ãããã®åçãéå§ãã¾ãã</p>

<p>
ãµã¼ãã¹ã®åæ­¢ã«ç¸å½ããã³ã¼ã«ããã¯ãã¤ã¾ã {@code onStop()} ã¡ã½ããã¯ããã¾ããã
</p></li>
</ul>

<p>
{@code onCreate()} ããã³ {@code onDestroy()} ã¡ã½ããã¯ããµã¼ãã¹ã <code>{@link android.content.Context#startService Context.startService()}</code> ã¾ã㯠<code>{@link android.content.Context#bindService Context.bindService()}</code> ã®ã©ã¡ãã§éå§ãããã«é¢ä¿ãªãããã¹ã¦ã®ãµã¼ãã¹ã§å¼ã³åºããã¾ããä¸æ¹ã{@code onStart()} ã¯ããµã¼ãã¹ã {@code startService()} ã§éå§ããå ´åã®ã¿å¼ã³åºããã¾ãã
</p>

<p>
ãµã¼ãã¹ãä»ããã®ãã¤ã³ãã許å¯ãã¦ããå ´åã¯ã以ä¸ã®ã³ã¼ã«ãã㯠ã¡ã½ããã追å ã§å®è£ã§ãã¾ã:
</p>

<p style="margin-left: 2em">{@code IBinder onBind(Intent <i>intent</i>)} <br/>{@code boolean onUnbind(Intent <i>intent</i>)} <br/>{@code void onRebind(Intent <i>intent</i>)}</p>

<p>
<code>{@link android.app.Service#onBind onBind()}</code> ã³ã¼ã«ããã¯ã«ã¯ {@code bindService()} ã«æ¸¡ããã Intent ãªãã¸ã§ã¯ãã渡ããã<code>{@link android.app.Service#onUnbind onUnbind()}</code> ã«ã¯ {@code unbindService()} 渡ããã Intent ãªãã¸ã§ã¯ãã渡ããã¾ãããµã¼ãã¹ããã¤ã³ãã許å¯ãã¦ããå ´åã¯ãã¯ã©ã¤ã¢ã³ãããµã¼ãã¹ã¨å¯¾è©±ããéä¿¡ãã£ãã«ã {@code onBind()} ã§è¿ãã¾ãã{@code onUnbind()} ã¡ã½ããã¯ããµã¼ãã¹ã«æ°ããã¯ã©ã¤ã¢ã³ããæ¥ç¶ããå ´åã« <code>{@link android.app.Service#onRebind onRebind()}</code> ã®å¼ã³åºããè¦æ±ã§ãã¾ãã
</p>

<p>
次ã®å³ã«ããµã¼ãã¹ã®ã³ã¼ã«ãã㯠ã¡ã½ããã示ãã¾ãããªãã{@code startService()} ã§ä½æããããµã¼ãã¹ã¨ã{@code bindService()} ã§ä½æããããµã¼ãã¹ãåãã¦è¨è¿°ãã¦ãã¾ãããä½æãããæ¹æ³ã«é¢ä¿ãªãï¼ãã¹ã¦ã®ãµã¼ãã¹ã¯ã¯ã©ã¤ã¢ã³ãããã®ãã¤ã³ãã許å¯ã§ãã¾ãããããã£ã¦ãã©ã®ãµã¼ãã¹ã {@code onBind()} ããã³{@code onUnbind()} ã¡ã½ããã®å¼ã³åºããåãåãå¯è½æ§ã¯ããã¾ãã
</p>

<p style="margin-left: 2em"><img src="{@docRoot}images/service_lifecycle.png"
alt="ãµã¼ãã¹ ã³ã¼ã«ããã¯ã®ç¶æé·ç§»å³"  /></p>


<h3 id="broadlife">ãã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ãã®ã©ã¤ããµã¤ã¯ã«</h3>

<p>
ãã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ãã®ã³ã¼ã«ãã㯠ã¡ã½ããã¯æ¬¡ã® 1 ã¤ã®ã¿ã§ã:
</p>

<p style="margin-left: 2em">{@code void onReceive(Context <i>curContext</i>, Intent <i>broadcastMsg</i>)}</p>

<p>
ã¬ã·ã¼ãã«ãã­ã¼ãã­ã£ã¹ã ã¡ãã»ã¼ã¸ãå±ãã¨ã<code>{@link android.content.BroadcastReceiver#onReceive onReceive()}</code> ã¡ã½ãããå¼ã³åºãããã¡ãã»ã¼ã¸ãä¿æãã Intent ãªãã¸ã§ã¯ãã渡ããã¾ãããã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ãã¯ããã®ã¡ã½ããã®å®è¡ä¸­ã®ã¿ã¢ã¯ãã£ãã¨è¦ãªããã¾ãã{@code onReceive()} çµäºããã¨ããã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ãã¯ã¢ã¯ãã£ãã§ãªããªãã¾ãã
</p>

<p>
ãã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ããã¢ã¯ãã£ãã«ãªã£ã¦ãããã­ã»ã¹ã¯ãå¼·å¶çµäºããªãããä¿è­·ããã¾ããä¸æ¹ãã¢ã¯ãã£ãã§ãªãã³ã³ãã¼ãã³ãã®ã¿ãããªããã­ã»ã¹ã¯ããããæ¶è²»ãã¦ããã¡ã¢ãªãä»ã®ãã­ã»ã¹ã§å¿è¦ã«ãªã£ãå ´åã¯ããã¤ã§ãå¼·å¶çµäºãããå¯è½æ§ãããã¾ãã
</p>

<p>
ãã®ç¹ã¯ããã­ã¼ãã­ã£ã¹ã ã¡ãã»ã¼ã¸ã¸ã®å¿ç­ã«æéãããããããã¦ã¼ã¶ã¼ ã¤ã³ã¿ã¼ãã§ã¼ã¹ã®ä»ã®ã³ã³ãã¼ãã³ããå®è¡ãã¦ããã¡ã¤ã³ ã¹ã¬ããã¨ã¯å¥ã®ã¹ã¬ããã§ä½ããã®å¦çãè¡ãå¿è¦ãããå ´åã«åé¡ã«ãªãã¾ãã{@code onReceive()} ãæ°ããã¹ã¬ãããçæãã¦çµäºããå ´åããã­ã»ã¹åã«ä»ã«ã¢ã¯ãã£ããªã¢ããªã±ã¼ã·ã§ã³ ã³ã³ãã¼ãã³ãããªããã°ããã®ã¹ã¬ãããå«ãããã­ã»ã¹å¨ä½ãã¢ã¯ãã£ãã§ãªãã¨å¤æ­ããã¦å¼·å¶çµäºãããããããããããã¾ãããã®åé¡ãåé¿ããã«ã¯ã{@code onReceive()} ã§ãµã¼ãã¹ãéå§ãããã®ãµã¼ãã¹ã«ã¸ã§ããå®è¡ããã¾ããããã«ããããã­ã»ã¹åã«ã¾ã ã¢ã¯ãã£ããªã³ã³ãã¼ãã³ããããã¨è¦ãªããã¾ãã
</p>

<p>
次ã®ã»ã¯ã·ã§ã³ã§ã¯ããã­ã»ã¹ãå¼·å¶çµäºãããå¯è½æ§ãé«ããªãç¶æ³ã«ã¤ãã¦ããã«è©³ãã説æãã¾ãã
</p>


<h3 id="proclife">ãã­ã»ã¹ã¨ã©ã¤ããµã¤ã¯ã«</h3>

<p>Android ã¯ããã­ã»ã¹ãã§ããã ãé·ãé維æãããã¨ãã¾ããããããæçµçã«ã¡ã¢ãªãä¸è¶³ããã¨ãã«ã¯ãå¤ããã­ã»ã¹ãåé¤ããªããã°ãªããªããªãã¾ããAndroid ã§ã¯ãã©ã®ãã­ã»ã¹ã維æããã©ã®ãã­ã»ã¹ãå¼·å¶çµäºãããããå¤æ­ããããããã­ã»ã¹åã§å®è¡ããã¦ããã³ã³ãã¼ãã³ãã¨åã³ã³ãã¼ãã³ãã®ç¶æã«åºã¥ãã¦ãåãã­ã»ã¹ããéè¦åº¦ã®é層ãã®ä½ç½®ã¥ãã¾ããã¾ãæãéè¦åº¦ã®ä½ããã­ã»ã¹ãåé¤ããã次㯠2 çªç®ã«éè¦åº¦ã®ä½ããã­ã»ã¹ããã®æ¬¡ã« 3 çªç®ãã¨ããããã«å¤æ­ããã¾ããé層㯠5 ã¤ã®ã¬ãã«ã§æ§æããã¾ãã以ä¸ã§ã¯ãéè¦åº¦ã®é«ããã®ããé ã«èª¬æãã¾ã:
</p>

<ol>

<li><b>ãã©ã¢ã°ã©ã¦ã³ã ãã­ã»ã¹</b>ã¯ãã¦ã¼ã¶ã¼ããã®æç¹ã§è¡ã£ã¦ããä½æ¥­ã«å¿è¦ãªãã­ã»ã¹ã§ãã以ä¸ã®ããããã®æ¡ä»¶ãæºããã¦ãããã­ã»ã¹ã¯ããã©ã¢ã°ã©ã¦ã³ã ãã­ã»ã¹ã¨è¦ãªããã¾ã:

<ul>
<li>ã¦ã¼ã¶ã¼ã¨å¯¾è©±ä¸­ã®ã¢ã¯ãã£ããã£ãå®è¡ãã¦ããï¼Activity ãªãã¸ã§ã¯ãã® <code>{@link android.app.Activity#onResume 
onResume()}</code> ã¡ã½ãããå¼ã³åºããã¦ããï¼ã</li>

<li><p>ã¦ã¼ã¶ã¼ã¨å¯¾è©±ä¸­ã®ã¢ã¯ãã£ããã£ã«ãã¤ã³ãããã¦ãããµã¼ãã¹ãå®è¡ãã¦ããã</p></li>

<li><p>ããããã®ã©ã¤ããµã¤ã¯ã« ã³ã¼ã«ããã¯ï¼<code>{@link android.app.Service#onCreate 
onCreate()}</code>ã<code>{@link android.app.Service#onStart onStart()}</code>ãã¾ã㯠<code>{@link android.app.Service#onDestroy onDestroy()}</code>ï¼ãå®è¡ãã¦ãã {@link android.app.Service} ãªãã¸ã§ã¯ããä¿æãã¦ããã</p></li>

<li><p><code>{@link android.content.BroadcastReceiver#onReceive 
onReceive()}</code> ã¡ã½ãããå®è¡ãã¦ãã {@link android.content.BroadcastReceiver} ãªãã¸ã§ã¯ããä¿æãã¦ããã</p></li>
</ul>

<p>
åæã«å­å¨ãããã©ã¢ã°ã©ã¦ã³ã ãã­ã»ã¹ã¯å°æ°ã«éããã¦ãã¾ãããã©ã¢ã°ã©ã¦ã³ã ãã­ã»ã¹ã¯ãã¡ã¢ãªã極端ã«ä¸è¶³ãããã¹ã¦ã®ãã©ã¢ã°ã©ã¦ã³ã ãã­ã»ã¹ã®å®è¡ãç¶ç¶ã§ããªãå ´åã®æçµæ段ã¨ãã¦å¼·å¶çµäºããããã¾ããé常ããã®æç¹ã§ããã¤ã¹ã¯ã¡ã¢ãª ãã¼ã¸ã³ã°ã®ç¶æã«éãã¦ãããã¦ã¼ã¶ã¼ ã¤ã³ã¿ã¼ãã§ã¼ã¹ãå¿ç­å¯è½ãªç¶æã«ç¶­æããããã«ã¯ããã©ã¢ã°ã©ã¦ã³ã ãã­ã»ã¹ã®ä¸é¨ãå¼·å¶çµäºãããªããã°ãªããªãç¶æ³ã«é¥ã£ã¦ãã¾ãã
</p></li>

<li><p><b>å¯è¦ãã­ã»ã¹</b>ã¯ããã©ã¢ã°ã©ã¦ã³ã ã³ã³ãã¼ãã³ãã§ã¯ãªããã®ã®ãã¦ã¼ã¶ã¼ãè¦ã¦ããç»é¢ã«å½±é¿ãåã¼ããã¨ã®ã§ãããã­ã»ã¹ã§ãã以ä¸ã®ããããã®æ¡ä»¶ãæºããã¦ãããã­ã»ã¹ã¯ãå¯è¦ãã­ã»ã¹ã¨è¦ãªããã¾ã:</p>

<ul>
<li>ãã©ã¢ã°ã©ã¦ã³ãã§ã¯ãªããã¦ã¼ã¶ã¼ããè¦ããã¨ãã§ããã¢ã¯ãã£ããã£ãå®è¡ãã¦ããï¼ãã® <code>{@link android.app.Activity#onPause onPause()}</code> ã¡ã½ãããå¼ã³åºããã¦ããï¼ãããã¯ããã¨ãã°ãã©ã¢ã°ã©ã¦ã³ã ã¢ã¯ãã£ããã£ããã¤ã¢ã­ã°ã§ããã®èå¾ã«ç´åã®ã¢ã¯ãã£ããã£ãè¦ãããããªç¶æ³ã§ãã</li>

<li><p>ã¦ã¼ã¶ã¼ããè¦ããã¨ã®ã§ããã¢ã¯ãã£ããã£ã«ãã¤ã³ãããã¦ãããµã¼ãã¹ãå®è¡ãã¦ããã</p></li>
</ul>

<p>
å¯è¦ãã­ã»ã¹ã¯ãé常ã«éè¦ãªãã­ã»ã¹ã¨è¦ãªããããã¹ã¦ã®ãã©ã¢ã°ã©ã¦ã³ã ãã­ã»ã¹ã®å®è¡ã維æããããã«å¿è¦ã§ãªãéããå¼·å¶çµäºããããããã¨ã¯ããã¾ããã
</p></li>

<li><p><b>ãµã¼ãã¹ ãã­ã»ã¹</b>ã¯ã<code>{@link android.content.Context#startService startService()}</code> ã¡ã½ããã§éå§ããããµã¼ãã¹ãå®è¡ãã¦ãããã­ã»ã¹ã®ãã¡ãããéè¦åº¦ã®é«ã 2 ã¤ã®ã¬ãã«ã®ã©ã¡ãã«ã該å½ããªããã­ã»ã¹ã§ãããµã¼ãã¹ ãã­ã»ã¹ã¯ãã¦ã¼ã¶ã¼ã«è¦ãããã®ã¨ã®ç´æ¥çãªé¢ä¿ã¯ããã¾ãããããã¨ãã°ããã¯ã°ã©ã¦ã³ãã§ã® MP3 ã®åçããããã¯ã¼ã¯ããã®ãã¼ã¿ã®ãã¦ã³ã­ã¼ããªã©ãã¦ã¼ã¶ã¼ãæ°ã«ããã¦ããå¦çã§ãããã¨ãä¸è¬çã§ãããããã£ã¦ããã¹ã¦ã®ãã©ã¢ã°ã©ã¦ã³ã ãã­ã»ã¹ã¨å¯è¦ãã­ã»ã¹ã«å ãããããã®ãµã¼ãã¹ ãã­ã»ã¹ã®å®è¡ã維æããã ãã®ã¡ã¢ãªã確ä¿ã§ããéããå¼·å¶çµäºããããããã¨ã¯ããã¾ããã  
</p></li>

<li><p><b>ããã¯ã°ã©ã¦ã³ã ãã­ã»ã¹</b>ã¯ããã®æç¹ã§ã¦ã¼ã¶ã¼ããè¦ããªãã¢ã¯ãã£ããã£ãä¿æãã¦ããï¼Activity ãªãã¸ã§ã¯ãã® <code>{@link android.app.Activity#onStop onStop()}</code> ã¡ã½ãããå¼ã³åºããã¦ããï¼ãã­ã»ã¹ã§ãããããã®ãã­ã»ã¹ã¯ãã¦ã¼ã¶ã¼ ã¨ã¯ã¹ããªã¨ã³ã¹ã«ç´æ¥çã«ã¯å½±é¿ãã¦ãããããã©ã¢ã°ã©ã¦ã³ããå¯è¦ããµã¼ãã¹ ãã­ã»ã¹ããã¡ã¢ãªãè¦æ±ãããå ´åã¯ãã¤ã§ãå¼·å¶çµäºããå¯è½æ§ãããã¾ããé常ã¯æ°å¤ãã®ããã¯ã°ã©ã¦ã³ã ãã­ã»ã¹ãå®è¡ããã¦ããããããããã LRUï¼least recently usedï¼ãªã¹ãã«ç»é²ããã¦ã¼ã¶ã¼ãä¸çªæè¿è¦ãã¢ã¯ãã£ããã£ã®ãã­ã»ã¹ãæå¾ã«å¼·å¶çµäºãããããªä»çµã¿ã«ãªã£ã¦ãã¾ããã¢ã¯ãã£ããã£ã«ã©ã¤ããµã¤ã¯ã« ã¡ã½ãããæ­£ããå®è£ããã¦ãããç¾å¨ã®ç¶æãæ­£ããä¿å­ããã¦ããã°ããã­ã»ã¹ãå¼·å¶çµäºãã¦ãã¦ã¼ã¶ã¼ ã¨ã¯ã¹ããªã¨ã³ã¹ã«æªå½±é¿ãåã¶ãã¨ã¯ããã¾ããã 
</p></li>

<li><p><b>空ã®ãã­ã»ã¹</b>ã¯ãã¢ã¯ãã£ããªã¢ããªã±ã¼ã·ã§ã³ ã³ã³ãã¼ãã³ããä¿æãã¦ããªããã­ã»ã¹ã§ãããã®ãããªãã­ã»ã¹ã維æãã¦ããå¯ä¸ã®çç±ã¯ããããã­ã£ãã·ã¥ã¨ãã¦ä½¿ç¨ãã次åã³ã³ãã¼ãã³ããå®è¡ããã¨ãã®èµ·åæéãç­ãããããã§ããå¤ãã®å ´åãã·ã¹ãã ã¯ãããã®ãã­ã»ã¹ãå¼·å¶çµäºããã¦ããã­ã»ã¹ ã­ã£ãã·ã¥ã¨ãã®åºç¤ã¨ãªãã«ã¼ãã« ã­ã£ãã·ã¥ã®éã§ã·ã¹ãã  ãªã½ã¼ã¹å¨ä½ã®ãã©ã³ã¹ãåãã¾ãã</p></li>

</ol>

<p>
åãã­ã»ã¹ã¯ããã®æç¹ã§ã¢ã¯ãã£ããªã³ã³ãã¼ãã³ãã®éè¦åº¦ã«åºã¥ãã¦ããã®ãã­ã»ã¹ãåãããæãé«ãã¬ãã«ã«ã©ã³ã¯ä»ãããã¾ãããã¨ãã°ããããã­ã»ã¹ããµã¼ãã¹ã¨å¯è¦ã¢ã¯ãã£ããã£ããã¹ããã¦ããå ´åããã®ãã­ã»ã¹ã¯ãµã¼ãã¹ ãã­ã»ã¹ã§ã¯ãªãå¯è¦ãã­ã»ã¹ã¨ãã¦ã©ã³ã¯ä»ãããã¾ãã
</p>

<p>
ã¾ãããããã­ã»ã¹ã«ä»ã®ãã­ã»ã¹ãä¾å­ãã¦ããããã«ããã®ãã­ã»ã¹ã®ã©ã³ã¯ãå¼ãä¸ããããå¯è½æ§ãããã¾ããä»ã®ãã­ã»ã¹ããä¾å­ããã¦ãããã­ã»ã¹ããä¾å­ãã¦ãããã­ã»ã¹ãããä½ãã¬ãã«ã«ã©ã³ã¯ä»ãããããã¨ã¯ããã¾ããããã¨ãã°ããã­ã»ã¹ A åã®ã³ã³ãã³ã ãã­ãã¤ãã«ãã­ã»ã¹ B åã®ã¯ã©ã¤ã¢ã³ããä¾å­ãã¦ããå ´åãããã­ã»ã¹ A åã®ãµã¼ãã¹ããã­ã»ã¹ B åã®ã³ã³ãã¼ãã³ãã«ãã¤ã³ãããã¦ããå ´åããã­ã»ã¹ A ã¯å¸¸ã«ãã­ã»ã¹ B ããã¯éè¦åº¦ãé«ãã¨è¦ãªããã¾ãã
</p> 

<p>
ãµã¼ãã¹ãå®è¡ãã¦ãããã­ã»ã¹ã¯ãããã¯ã°ã©ã¦ã³ã ã¢ã¯ãã£ããã£ãå®è¡ãã¦ãããã­ã»ã¹ãããé«ãã©ã³ã¯ä»ãããã¾ãããããã£ã¦ãæéã®ãããå¦çãå®è¡ããå ´åãç¹ã«ãã®å¦çãã¢ã¯ãã£ããã£ãããé·ãç¶ããããªå ´åã¯ãåã«ã¹ã¬ãããçæããã®ã§ã¯ãªãããã®å¦çç¨ã®ãµã¼ãã¹ãéå§ãããã¨ããããããã¾ãããã¨ãã°ãããã¯ã°ã©ã¦ã³ãã§é³æ¥½ãåçããå ´åããã«ã¡ã©ã§æ®å½±ããåçã Web ãµã¤ãã«ã¢ããã­ã¼ãããå ´åãªã©ã¯ããã«å½ããã¾ãããµã¼ãã¹ã使ç¨ãããã¨ã§ãã¢ã¯ãã£ããã£ãã©ã®ãããªç¶æ³ã«ãã£ã¦ããå¦çã®éè¦åº¦ã¨ãã¦ããµã¼ãã¹ ãã­ã»ã¹ãã¬ãã«ä»¥ä¸ã維æã§ãã¾ãã<a href="#broadlife">ãã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ãã®ã©ã¤ããµã¤ã¯ã«</a>ã®ã»ã¯ã·ã§ã³ã§ã説æãã¾ãããããã­ã¼ãã­ã£ã¹ã ã¬ã·ã¼ãã«ããã¦ãããã¨åãçç±ã§ãå¦çã«æéããããå ´åã¯ã¹ã¬ããã§ã¯ãªããµã¼ãã¹ã使ç¨ãããã¨ããããããã¾ãã
</p>