| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.app; |
| |
| import org.xmlpull.v1.XmlPullParser; |
| import org.xmlpull.v1.XmlPullParserException; |
| |
| import android.content.Intent; |
| import android.content.pm.ActivityInfo; |
| import android.content.pm.PackageManager; |
| import android.content.res.XmlResourceParser; |
| import android.os.Bundle; |
| import android.util.AttributeSet; |
| import android.util.Xml; |
| |
| import com.android.internal.util.XmlUtils; |
| |
| import java.io.IOException; |
| |
| /** |
| * Stub activity that launches another activity (and then finishes itself) |
| * based on information in its component's manifest meta-data. This is a |
| * simple way to implement an alias-like mechanism. |
| * |
| * To use this activity, you should include in the manifest for the associated |
| * component an entry named "android.app.alias". It is a reference to an XML |
| * resource describing an intent that launches the real application. |
| * |
| * @deprecated Use {@code <activity-alias>} or subclass Activity directly. |
| */ |
| @Deprecated |
| public class AliasActivity extends Activity { |
| /** |
| * This is the name under which you should store in your component the |
| * meta-data information about the alias. It is a reference to an XML |
| * resource describing an intent that launches the real application. |
| * {@hide} |
| */ |
| public final String ALIAS_META_DATA = "android.app.alias"; |
| |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| |
| XmlResourceParser parser = null; |
| try { |
| ActivityInfo ai = getPackageManager().getActivityInfo( |
| getComponentName(), PackageManager.GET_META_DATA); |
| parser = ai.loadXmlMetaData(getPackageManager(), |
| ALIAS_META_DATA); |
| if (parser == null) { |
| throw new RuntimeException("Alias requires a meta-data field " |
| + ALIAS_META_DATA); |
| } |
| |
| Intent intent = parseAlias(parser); |
| if (intent == null) { |
| throw new RuntimeException( |
| "No <intent> tag found in alias description"); |
| } |
| |
| startActivity(intent); |
| finish(); |
| |
| } catch (PackageManager.NameNotFoundException e) { |
| throw new RuntimeException("Error parsing alias", e); |
| } catch (XmlPullParserException e) { |
| throw new RuntimeException("Error parsing alias", e); |
| } catch (IOException e) { |
| throw new RuntimeException("Error parsing alias", e); |
| } finally { |
| if (parser != null) parser.close(); |
| } |
| } |
| |
| private Intent parseAlias(XmlPullParser parser) |
| throws XmlPullParserException, IOException { |
| AttributeSet attrs = Xml.asAttributeSet(parser); |
| |
| Intent intent = null; |
| |
| int type; |
| while ((type=parser.next()) != XmlPullParser.END_DOCUMENT |
| && type != XmlPullParser.START_TAG) { |
| } |
| |
| String nodeName = parser.getName(); |
| if (!"alias".equals(nodeName)) { |
| throw new RuntimeException( |
| "Alias meta-data must start with <alias> tag; found" |
| + nodeName + " at " + parser.getPositionDescription()); |
| } |
| |
| int outerDepth = parser.getDepth(); |
| while ((type=parser.next()) != XmlPullParser.END_DOCUMENT |
| && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { |
| if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { |
| continue; |
| } |
| |
| nodeName = parser.getName(); |
| if ("intent".equals(nodeName)) { |
| Intent gotIntent = Intent.parseIntent(getResources(), parser, attrs); |
| if (intent == null) intent = gotIntent; |
| } else { |
| XmlUtils.skipCurrentTag(parser); |
| } |
| } |
| |
| return intent; |
| } |
| |
| } |