19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2007 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage android.app; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport org.xmlpull.v1.XmlPullParser; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport org.xmlpull.v1.XmlPullParserException; 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.Intent; 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.pm.ActivityInfo; 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.pm.PackageManager; 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.res.XmlResourceParser; 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.Bundle; 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.AttributeSet; 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.Xml; 292269d1572e5fcfb725ea55f5764d8c3280d69f6dDianne Hackborn 302269d1572e5fcfb725ea55f5764d8c3280d69f6dDianne Hackbornimport com.android.internal.util.XmlUtils; 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.io.IOException; 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Stub activity that launches another activity (and then finishes itself) 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * based on information in its component's manifest meta-data. This is a 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * simple way to implement an alias-like mechanism. 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * To use this activity, you should include in the manifest for the associated 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * component an entry named "android.app.alias". It is a reference to an XML 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * resource describing an intent that launches the real application. 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class AliasActivity extends Activity { 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This is the name under which you should store in your component the 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * meta-data information about the alias. It is a reference to an XML 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * resource describing an intent that launches the real application. 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@hide} 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final String ALIAS_META_DATA = "android.app.alias"; 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onCreate(Bundle savedInstanceState) { 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onCreate(savedInstanceState); 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project XmlResourceParser parser = null; 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ActivityInfo ai = getPackageManager().getActivityInfo( 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project getComponentName(), PackageManager.GET_META_DATA); 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project parser = ai.loadXmlMetaData(getPackageManager(), 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ALIAS_META_DATA); 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (parser == null) { 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException("Alias requires a meta-data field " 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + ALIAS_META_DATA); 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Intent intent = parseAlias(parser); 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (intent == null) { 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException( 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "No <intent> tag found in alias description"); 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project startActivity(intent); 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project finish(); 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (PackageManager.NameNotFoundException e) { 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException("Error parsing alias", e); 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (XmlPullParserException e) { 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException("Error parsing alias", e); 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (IOException e) { 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException("Error parsing alias", e); 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } finally { 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (parser != null) parser.close(); 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Intent parseAlias(XmlPullParser parser) 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throws XmlPullParserException, IOException { 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project AttributeSet attrs = Xml.asAttributeSet(parser); 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Intent intent = null; 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int type; 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while ((type=parser.next()) != XmlPullParser.END_DOCUMENT 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && type != XmlPullParser.START_TAG) { 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project String nodeName = parser.getName(); 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!"alias".equals(nodeName)) { 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException( 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "Alias meta-data must start with <alias> tag; found" 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + nodeName + " at " + parser.getPositionDescription()); 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int outerDepth = parser.getDepth(); 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while ((type=parser.next()) != XmlPullParser.END_DOCUMENT 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project continue; 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nodeName = parser.getName(); 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ("intent".equals(nodeName)) { 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Intent gotIntent = Intent.parseIntent(getResources(), parser, attrs); 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (intent == null) intent = gotIntent; 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project XmlUtils.skipCurrentTag(parser); 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return intent; 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 125