DexMaker.html revision e3ecebfb7a89fbe549680e47d7e6f306d5ae146c
1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<!--NewPage--> 3<HTML> 4<HEAD> 5<!-- Generated by javadoc (build 1.6.0_26) on Mon Jan 09 16:02:37 EST 2012 --> 6<TITLE> 7DexMaker (dexmaker) 8</TITLE> 9 10<META NAME="date" CONTENT="2012-01-09"> 11 12<LINK REL ="stylesheet" TYPE="text/css" HREF="/stylesheet.css" TITLE="Style"> 13 14<SCRIPT type="text/javascript"> 15function windowTitle() 16{ 17 if (location.href.indexOf('is-external=true') == -1) { 18 parent.document.title="DexMaker (dexmaker)"; 19 } 20} 21</SCRIPT> 22<NOSCRIPT> 23</NOSCRIPT> 24 25</HEAD> 26 27<BODY BGCOLOR="white" onload="windowTitle();"> 28<HR> 29 30 31<!-- ========= START OF TOP NAVBAR ======= --> 32<A NAME="navbar_top"><!-- --></A> 33<A HREF="#skip-navbar_top" title="Skip navigation links"></A> 34<TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""> 35<TR> 36<TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> 37<A NAME="navbar_top_firstrow"><!-- --></A> 38<TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> 39 <TR ALIGN="center" VALIGN="top"> 40 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="/overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> 41 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> 42 <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> 43 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> 44 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="/deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> 45 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="/index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> 46 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="/help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> 47 </TR> 48</TABLE> 49</TD> 50<TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM> 51</EM> 52</TD> 53</TR> 54 55<TR> 56<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> 57 <A HREF="/com/google/dexmaker/Comparison.html" title="enum in com.google.dexmaker"><B>PREV CLASS</B></A> 58 <A HREF="/com/google/dexmaker/FieldId.html" title="class in com.google.dexmaker"><B>NEXT CLASS</B></A></FONT></TD> 59<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> 60 <A HREF="/index.html?com/google/dexmaker/DexMaker.html" target="_top"><B>FRAMES</B></A> 61 <A HREF="DexMaker.html" target="_top"><B>NO FRAMES</B></A> 62 <SCRIPT type="text/javascript"> 63 <!-- 64 if(window==top) { 65 document.writeln('<A HREF="/allclasses-noframe.html"><B>All Classes</B></A>'); 66 } 67 //--> 68</SCRIPT> 69<NOSCRIPT> 70 <A HREF="/allclasses-noframe.html"><B>All Classes</B></A> 71</NOSCRIPT> 72 73 74</FONT></TD> 75</TR> 76<TR> 77<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> 78 SUMMARY: NESTED | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD> 79<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> 80DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD> 81</TR> 82</TABLE> 83<A NAME="skip-navbar_top"></A> 84<!-- ========= END OF TOP NAVBAR ========= --> 85 86<HR> 87<!-- ======== START OF CLASS DATA ======== --> 88<H2> 89<FONT SIZE="-1"> 90com.google.dexmaker</FONT> 91<BR> 92Class DexMaker</H2> 93<PRE> 94java.lang.Object 95 <IMG SRC="/resources/inherit.gif" ALT="extended by "><B>com.google.dexmaker.DexMaker</B> 96</PRE> 97<HR> 98<DL> 99<DT><PRE>public final class <B>DexMaker</B><DT>extends java.lang.Object</DL> 100</PRE> 101 102<P> 103Generates a </i><strong>D</strong>alvik <strong>EX</strong>ecutable (dex) 104 file for execution on Android. Dex files define classes and interfaces, 105 including their member methods and fields, executable code, and debugging 106 information. They also define annotations, though this API currently has no 107 facility to create a dex file that contains annotations. 108 109 <p>This library is intended to satisfy two use cases: 110 <ul> 111 <li><strong>For runtime code generation.</strong> By embedding this library 112 in your Android application, you can dynamically generate and load 113 executable code. This approach takes advantage of the fact that the 114 host environment and target environment are both Android. 115 <li><strong>For compile time code generation.</strong> You may use this 116 library as a part of a compiler that targets Android. In this scenario 117 the generated dex file must be installed on an Android device before it 118 can be executed. 119 </ul> 120 121 <h3>Example: Fibonacci</h3> 122 To illustrate how this API is used, we'll use DexMaker to generate a class 123 equivalent to the following Java source: <pre> <code>package com.publicobject.fib; 124 125 public class Fibonacci { 126 public static int fib(int i) { 127 if (i < 2) { 128 return i; 129 } 130 return fib(i - 1) + fib(i - 2); 131 } 132 }</code></pre> 133 134 <p>We start by creating a <A HREF="/com/google/dexmaker/TypeId.html" title="class in com.google.dexmaker"><CODE>TypeId</CODE></A> to identify the generated <code>Fibonacci</code> class. DexMaker identifies types by their internal names like 135 <code>Ljava/lang/Object;</code> rather than their Java identifiers like <code>java.lang.Object</code>. <pre> <code>TypeId<?> fibonacci = TypeId.get("Lcom/google/dexmaker/examples/Fibonacci;"); 136 </code></pre> 137 138 <p>Next we declare the class. It allows us to specify the type's source file 139 for stack traces, its modifiers, its superclass, and the interfaces it 140 implements. In this case, <code>Fibonacci</code> is a public class that extends 141 from <code>Object</code>: <pre> <code>String fileName = "Fibonacci.generated"; 142 DexMaker dexMaker = new DexMaker(); 143 dexMaker.declare(fibonacci, fileName, Modifier.PUBLIC, TypeId.OBJECT); 144 </code></pre> 145 It is illegal to declare members of a class without also declaring the class 146 itself. 147 148 <p>To make it easier to go from our Java method to dex instructions, we'll 149 manually translate it to pseudocode fit for an assembler. We need to replace 150 control flow like <code>if()</code> blocks and <code>for()</code> loops with labels and 151 branches. We'll also avoid performing multiple operations in one statement, 152 using local variables to hold intermediate values as necessary: 153 <pre> <code>int constant1 = 1; 154 int constant2 = 2; 155 if (i < constant2) goto baseCase; 156 int a = i - constant1; 157 int b = i - constant2; 158 int c = fib(a); 159 int d = fib(b); 160 int result = c + d; 161 return result; 162 baseCase: 163 return i; 164 </code></pre> 165 166 <p>We look up the <code>MethodId</code> for the method on the declaring type. This 167 takes the method's return type (possibly <A HREF="/com/google/dexmaker/TypeId.html#VOID"><CODE>TypeId.VOID</CODE></A>), its name and 168 its parameters types. Next we declare the method, specifying its modifiers by 169 bitwise ORing constants from <CODE>Modifier</CODE>. The declare 170 call returns a <A HREF="/com/google/dexmaker/Code.html" title="class in com.google.dexmaker"><CODE>Code</CODE></A> object, which we'll use to define the method's 171 instructions. <pre> <code>MethodId<?, Integer> fib = fibonacci.getMethod(TypeId.INT, "fib", TypeId.INT); 172 Code code = dexMaker.declare(fib, Modifier.PUBLIC | Modifier.STATIC); 173 </code></pre> 174 175 <p>One limitation of <code>DexMaker</code>'s API is that it requires all local 176 variables to be created before any instructions are emitted. Use <A HREF="/com/google/dexmaker/Code.html#newLocal(com.google.dexmaker.TypeId)"><CODE>newLocal()</CODE></A> to create a new local variable. The method's 177 parameters are exposed as locals using <A HREF="/com/google/dexmaker/Code.html#getParameter(int, com.google.dexmaker.TypeId)"><CODE>getParameter()</CODE></A>. For non-static methods the <code>this</code> pointer is exposed 178 using <A HREF="/com/google/dexmaker/Code.html#getThis(com.google.dexmaker.TypeId)"><CODE>getThis()</CODE></A>. Here we declare all of the local 179 variables that we'll need for our <code>fib()</code> method: <pre> <code>Local<Integer> i = code.getParameter(0, TypeId.INT); 180 Local<Integer> constant1 = code.newLocal(TypeId.INT); 181 Local<Integer> constant2 = code.newLocal(TypeId.INT); 182 Local<Integer> a = code.newLocal(TypeId.INT); 183 Local<Integer> b = code.newLocal(TypeId.INT); 184 Local<Integer> c = code.newLocal(TypeId.INT); 185 Local<Integer> d = code.newLocal(TypeId.INT); 186 Local<Integer> result = code.newLocal(TypeId.INT); 187 </code></pre> 188 189 <p>Notice that <A HREF="/com/google/dexmaker/Local.html" title="class in com.google.dexmaker"><CODE>Local</CODE></A> has a type parameter of <code>Integer</code>. This is 190 useful for generating code that works with existing types like <code>String</code> 191 and <code>Integer</code>, but it can be a hindrance when generating code that 192 involves new types. For this reason you may prefer to use raw types only and 193 add <code>@SuppressWarnings("unsafe")</code> on your calling code. This will yield 194 the same result but you won't get IDE support if you make a type error. 195 196 <p>We're ready to start defining our method's instructions. The <A HREF="/com/google/dexmaker/Code.html" title="class in com.google.dexmaker"><CODE>Code</CODE></A> 197 class catalogs the available instructions and their use. <pre> <code>code.loadConstant(constant1, 1); 198 code.loadConstant(constant2, 2); 199 Label baseCase = new Label(); 200 code.compare(Comparison.LT, baseCase, i, constant2); 201 code.op(BinaryOp.SUBTRACT, a, i, constant1); 202 code.op(BinaryOp.SUBTRACT, b, i, constant2); 203 code.invokeStatic(fib, c, a); 204 code.invokeStatic(fib, d, b); 205 code.op(BinaryOp.ADD, result, c, d); 206 code.returnValue(result); 207 code.mark(baseCase); 208 code.returnValue(i); 209 </code></pre> 210 211 <p>We're done defining the dex file. We just need to write it to the 212 filesystem or load it into the current process. For this example we'll load 213 the generated code into the current process. This only works when the current 214 process is running on Android. We use <A HREF="/com/google/dexmaker/DexMaker.html#generateAndLoad(java.lang.ClassLoader, java.io.File)"><CODE>generateAndLoad(java.lang.ClassLoader, java.io.File)</CODE></A> which takes 215 the class loader that will be used as our generated code's parent class 216 loader. It also requires a directory where temporary files can be written. 217 <pre> <code>ClassLoader loader = dexMaker.generateAndLoad( 218 Fibonacci.class.getClassLoader(), getDataDirectory()); 219 </code></pre> 220 Finally we'll use reflection to lookup our generated class on its class 221 loader and invoke its <code>fib()</code> method: <pre> <code>Class<?> fibonacciClass = loader.loadClass("com.google.dexmaker.examples.Fibonacci"); 222 Method fibMethod = fibonacciClass.getMethod("fib", int.class); 223 System.out.println(fibMethod.invoke(null, 8)); 224 </code></pre> 225<P> 226 227<P> 228<HR> 229 230<P> 231 232<!-- ======== CONSTRUCTOR SUMMARY ======== --> 233 234<A NAME="constructor_summary"><!-- --></A> 235<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 236<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> 237<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> 238<B>Constructor Summary</B></FONT></TH> 239</TR> 240<TR BGCOLOR="white" CLASS="TableRowColor"> 241<TD><CODE><B><A HREF="/com/google/dexmaker/DexMaker.html#DexMaker()">DexMaker</A></B>()</CODE> 242 243<BR> 244 </TD> 245</TR> 246</TABLE> 247 248<!-- ========== METHOD SUMMARY =========== --> 249 250<A NAME="method_summary"><!-- --></A> 251<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 252<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> 253<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> 254<B>Method Summary</B></FONT></TH> 255</TR> 256<TR BGCOLOR="white" CLASS="TableRowColor"> 257<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 258<CODE> void</CODE></FONT></TD> 259<TD><CODE><B><A HREF="/com/google/dexmaker/DexMaker.html#declare(com.google.dexmaker.FieldId, int, java.lang.Object)">declare</A></B>(<A HREF="/com/google/dexmaker/FieldId.html" title="class in com.google.dexmaker">FieldId</A><?,?> fieldId, 260 int flags, 261 java.lang.Object staticValue)</CODE> 262 263<BR> 264 Declares a field.</TD> 265</TR> 266<TR BGCOLOR="white" CLASS="TableRowColor"> 267<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 268<CODE> <A HREF="/com/google/dexmaker/Code.html" title="class in com.google.dexmaker">Code</A></CODE></FONT></TD> 269<TD><CODE><B><A HREF="/com/google/dexmaker/DexMaker.html#declare(com.google.dexmaker.MethodId, int)">declare</A></B>(<A HREF="/com/google/dexmaker/MethodId.html" title="class in com.google.dexmaker">MethodId</A><?,?> method, 270 int flags)</CODE> 271 272<BR> 273 Declares a method.</TD> 274</TR> 275<TR BGCOLOR="white" CLASS="TableRowColor"> 276<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 277<CODE> void</CODE></FONT></TD> 278<TD><CODE><B><A HREF="/com/google/dexmaker/DexMaker.html#declare(com.google.dexmaker.TypeId, java.lang.String, int, com.google.dexmaker.TypeId, com.google.dexmaker.TypeId...)">declare</A></B>(<A HREF="/com/google/dexmaker/TypeId.html" title="class in com.google.dexmaker">TypeId</A><?> type, 279 java.lang.String sourceFile, 280 int flags, 281 <A HREF="/com/google/dexmaker/TypeId.html" title="class in com.google.dexmaker">TypeId</A><?> supertype, 282 <A HREF="/com/google/dexmaker/TypeId.html" title="class in com.google.dexmaker">TypeId</A><?>... interfaces)</CODE> 283 284<BR> 285 Declares <code>type</code>.</TD> 286</TR> 287<TR BGCOLOR="white" CLASS="TableRowColor"> 288<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 289<CODE> <A HREF="/com/google/dexmaker/Code.html" title="class in com.google.dexmaker">Code</A></CODE></FONT></TD> 290<TD><CODE><B><A HREF="/com/google/dexmaker/DexMaker.html#declareConstructor(com.google.dexmaker.MethodId, int)">declareConstructor</A></B>(<A HREF="/com/google/dexmaker/MethodId.html" title="class in com.google.dexmaker">MethodId</A><?,?> method, 291 int flags)</CODE> 292 293<BR> 294 Declares a constructor.</TD> 295</TR> 296<TR BGCOLOR="white" CLASS="TableRowColor"> 297<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 298<CODE> byte[]</CODE></FONT></TD> 299<TD><CODE><B><A HREF="/com/google/dexmaker/DexMaker.html#generate()">generate</A></B>()</CODE> 300 301<BR> 302 Generates a dex file and returns its bytes.</TD> 303</TR> 304<TR BGCOLOR="white" CLASS="TableRowColor"> 305<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 306<CODE> java.lang.ClassLoader</CODE></FONT></TD> 307<TD><CODE><B><A HREF="/com/google/dexmaker/DexMaker.html#generateAndLoad(java.lang.ClassLoader, java.io.File)">generateAndLoad</A></B>(java.lang.ClassLoader parent, 308 java.io.File dexDir)</CODE> 309 310<BR> 311 Generates a dex file and loads its types into the current process.</TD> 312</TR> 313</TABLE> 314 <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> 315<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 316<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> 317<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH> 318</TR> 319<TR BGCOLOR="white" CLASS="TableRowColor"> 320<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD> 321</TR> 322</TABLE> 323 324<P> 325 326<!-- ========= CONSTRUCTOR DETAIL ======== --> 327 328<A NAME="constructor_detail"><!-- --></A> 329<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 330<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> 331<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> 332<B>Constructor Detail</B></FONT></TH> 333</TR> 334</TABLE> 335 336<A NAME="DexMaker()"><!-- --></A><H3> 337DexMaker</H3> 338<PRE> 339public <B>DexMaker</B>()</PRE> 340<DL> 341</DL> 342 343<!-- ============ METHOD DETAIL ========== --> 344 345<A NAME="method_detail"><!-- --></A> 346<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 347<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> 348<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> 349<B>Method Detail</B></FONT></TH> 350</TR> 351</TABLE> 352 353<A NAME="declare(com.google.dexmaker.TypeId, java.lang.String, int, com.google.dexmaker.TypeId, com.google.dexmaker.TypeId...)"><!-- --></A><H3> 354declare</H3> 355<PRE> 356public void <B>declare</B>(<A HREF="/com/google/dexmaker/TypeId.html" title="class in com.google.dexmaker">TypeId</A><?> type, 357 java.lang.String sourceFile, 358 int flags, 359 <A HREF="/com/google/dexmaker/TypeId.html" title="class in com.google.dexmaker">TypeId</A><?> supertype, 360 <A HREF="/com/google/dexmaker/TypeId.html" title="class in com.google.dexmaker">TypeId</A><?>... interfaces)</PRE> 361<DL> 362<DD>Declares <code>type</code>. 363<P> 364<DD><DL> 365<DT><B>Parameters:</B><DD><CODE>flags</CODE> - a bitwise combination of <CODE>Modifier.PUBLIC</CODE>, <CODE>Modifier.FINAL</CODE> and <CODE>Modifier.ABSTRACT</CODE>.</DL> 366</DD> 367</DL> 368<HR> 369 370<A NAME="declareConstructor(com.google.dexmaker.MethodId, int)"><!-- --></A><H3> 371declareConstructor</H3> 372<PRE> 373public <A HREF="/com/google/dexmaker/Code.html" title="class in com.google.dexmaker">Code</A> <B>declareConstructor</B>(<A HREF="/com/google/dexmaker/MethodId.html" title="class in com.google.dexmaker">MethodId</A><?,?> method, 374 int flags)</PRE> 375<DL> 376<DD>Declares a constructor. The name of <code>method</code> must be "<init>", 377 as it is on all instances returned by <A HREF="/com/google/dexmaker/TypeId.html#getConstructor(com.google.dexmaker.TypeId...)"><CODE>TypeId.getConstructor(com.google.dexmaker.TypeId<?>...)</CODE></A>. 378<P> 379<DD><DL> 380<DT><B>Parameters:</B><DD><CODE>flags</CODE> - a bitwise combination of <CODE>Modifier.PUBLIC</CODE>, <CODE>Modifier.PRIVATE</CODE>, <CODE>Modifier.PROTECTED</CODE>, <CODE>Modifier.STATIC</CODE>, 381 <CODE>Modifier.FINAL</CODE>, and <CODE>Modifier.VARARGS</CODE>.</DL> 382</DD> 383</DL> 384<HR> 385 386<A NAME="declare(com.google.dexmaker.MethodId, int)"><!-- --></A><H3> 387declare</H3> 388<PRE> 389public <A HREF="/com/google/dexmaker/Code.html" title="class in com.google.dexmaker">Code</A> <B>declare</B>(<A HREF="/com/google/dexmaker/MethodId.html" title="class in com.google.dexmaker">MethodId</A><?,?> method, 390 int flags)</PRE> 391<DL> 392<DD>Declares a method. The name of <code>method</code> must not be "<init>". 393<P> 394<DD><DL> 395<DT><B>Parameters:</B><DD><CODE>flags</CODE> - a bitwise combination of <CODE>Modifier.PUBLIC</CODE>, <CODE>Modifier.PRIVATE</CODE>, <CODE>Modifier.PROTECTED</CODE>, <CODE>Modifier.STATIC</CODE>, 396 <CODE>Modifier.FINAL</CODE>, and <CODE>Modifier.VARARGS</CODE>.</DL> 397</DD> 398</DL> 399<HR> 400 401<A NAME="declare(com.google.dexmaker.FieldId, int, java.lang.Object)"><!-- --></A><H3> 402declare</H3> 403<PRE> 404public void <B>declare</B>(<A HREF="/com/google/dexmaker/FieldId.html" title="class in com.google.dexmaker">FieldId</A><?,?> fieldId, 405 int flags, 406 java.lang.Object staticValue)</PRE> 407<DL> 408<DD>Declares a field. 409<P> 410<DD><DL> 411<DT><B>Parameters:</B><DD><CODE>flags</CODE> - a bitwise combination of <CODE>Modifier.PUBLIC</CODE>, <CODE>Modifier.PRIVATE</CODE>, <CODE>Modifier.PROTECTED</CODE>, <CODE>Modifier.STATIC</CODE>, 412 <CODE>Modifier.FINAL</CODE>, <CODE>Modifier.VOLATILE</CODE>, and <CODE>Modifier.TRANSIENT</CODE>.</DL> 413</DD> 414</DL> 415<HR> 416 417<A NAME="generate()"><!-- --></A><H3> 418generate</H3> 419<PRE> 420public byte[] <B>generate</B>()</PRE> 421<DL> 422<DD>Generates a dex file and returns its bytes. 423<P> 424<DD><DL> 425</DL> 426</DD> 427</DL> 428<HR> 429 430<A NAME="generateAndLoad(java.lang.ClassLoader, java.io.File)"><!-- --></A><H3> 431generateAndLoad</H3> 432<PRE> 433public java.lang.ClassLoader <B>generateAndLoad</B>(java.lang.ClassLoader parent, 434 java.io.File dexDir) 435 throws java.io.IOException</PRE> 436<DL> 437<DD>Generates a dex file and loads its types into the current process. 438 439 <p>All parameters are optional; you may pass <code>null</code> and suitable 440 defaults will be used. 441 442 <p>If you opt to provide your own <code>dexDir</code>, take care to ensure 443 that it is not world-writable, otherwise a malicious app may be able 444 to inject code into your process. A suitable parameter is: 445 <code>getApplicationContext().getDir("dx", Context.MODE_PRIVATE); </code> 446<P> 447<DD><DL> 448<DT><B>Parameters:</B><DD><CODE>parent</CODE> - the parent ClassLoader to be used when loading 449 our generated types<DD><CODE>dexDir</CODE> - the destination directory where generated and 450 optimized dex files will be written. 451<DT><B>Throws:</B> 452<DD><CODE>java.io.IOException</CODE></DL> 453</DD> 454</DL> 455<!-- ========= END OF CLASS DATA ========= --> 456<HR> 457 458 459<!-- ======= START OF BOTTOM NAVBAR ====== --> 460<A NAME="navbar_bottom"><!-- --></A> 461<A HREF="#skip-navbar_bottom" title="Skip navigation links"></A> 462<TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""> 463<TR> 464<TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> 465<A NAME="navbar_bottom_firstrow"><!-- --></A> 466<TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> 467 <TR ALIGN="center" VALIGN="top"> 468 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="/overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> 469 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> 470 <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> 471 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> 472 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="/deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> 473 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="/index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> 474 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="/help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> 475 </TR> 476</TABLE> 477</TD> 478<TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM> 479</EM> 480</TD> 481</TR> 482 483<TR> 484<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> 485 <A HREF="/com/google/dexmaker/Comparison.html" title="enum in com.google.dexmaker"><B>PREV CLASS</B></A> 486 <A HREF="/com/google/dexmaker/FieldId.html" title="class in com.google.dexmaker"><B>NEXT CLASS</B></A></FONT></TD> 487<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> 488 <A HREF="/index.html?com/google/dexmaker/DexMaker.html" target="_top"><B>FRAMES</B></A> 489 <A HREF="DexMaker.html" target="_top"><B>NO FRAMES</B></A> 490 <SCRIPT type="text/javascript"> 491 <!-- 492 if(window==top) { 493 document.writeln('<A HREF="/allclasses-noframe.html"><B>All Classes</B></A>'); 494 } 495 //--> 496</SCRIPT> 497<NOSCRIPT> 498 <A HREF="/allclasses-noframe.html"><B>All Classes</B></A> 499</NOSCRIPT> 500 501 502</FONT></TD> 503</TR> 504<TR> 505<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> 506 SUMMARY: NESTED | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD> 507<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> 508DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD> 509</TR> 510</TABLE> 511<A NAME="skip-navbar_bottom"></A> 512<!-- ======== END OF BOTTOM NAVBAR ======= --> 513 514<HR> 515 516</BODY> 517</HTML> 518
