Android Technology Point notes-(Install app and uninstall app broadcast)

Android Technology Point notes-(Install app and uninstall app broadcast)

Summary: Summarize the broadcast usage of apps installed and uninstalled in Android.

On Android, the installation and uninstallation will send out the corresponding broadcasts, and the system will broadcast Android.intent.action.PACKAGE_ADDED after the application installation is complete.

The installed package name can be obtained by intent.getdatastring (). The system sends Android.intent.action.PACKAGE_REMOVED broadcasts when the program is uninstalled. the same intent.getdatastring () gets the package name that was unloaded. According to the actual needs to do the corresponding operation.

Example:

Create a new Broadcastreceiver class, accept the broadcast and process it as required.

public class Myreceiver extends Broadcastreceiver {@Override public void OnReceive (Context Co  ntext, Intent Intent) {//Receive broadcast: Run Program if (Intent.getaction (). Equals ("Android.intent.action.BOOT_COMPLETED") after system boot is complete                     {Intent newintent = new Intent (context, xxxactivity.class);                        Newintent.setaction ("Android.intent.action.MAIN");                      Newintent.addcategory ("Android.intent.category.LAUNCHER");                        Newintent.setflags (Intent.flag_activity_new_task);                Context.startactivity (newintent); }//Receive broadcast: Automatically start the new installation application after a new application package is installed on the device if (Intent.getaction (). Equals ("Android.intent.action.PACKAGE_ADDED")) {  & nbsp                String PackageName = intent.getdatastring (). substring (8);                    SYSTEM.OUT.PRINTLN ("---------------" + PackageName);     &nbsp       Intent newintent = new Intent ();                    Newintent.setclassname (packagename,packagename+). Mainactivity ");                  newintent.setaction   ("Android.intent.action.MAIN");                             Newintent.addcatego Ry ("Android.intent.category.LAUNCHER");                             Newintent.setflags ( Intent.flag_activity_new_task);                    context.startactivity (newintent);               }               //Receive broadcast: on device An application package was deleted.        if (Intent.getaction () equals ("Android.intent.action.PACKAGE_REMOVED")) {                   SYSTEM.OUT.PRINTLN ("********************************");                    Databasehelper dbhelper = new Databasehelper ();                    Dbhelper.executesql ("delete from xxx");               }}

Note:Modifying the Androidmanifest.xml configuration file

<?xml version= "1.0" encoding= "UTF-8"?> <manifest xmlns:android= "http://schemas.android.com/apk/res/ Android "package=" App.ui "> <application> <receiver android:name=".                       Myreceiver "android:label=" @string/app_name "> <intent-filter> <action android:name= "Android.intent.action.BOOT_COMPLETED"/> <category androi                    D:name= "Android.intent.category.LAUNCHER"/> </intent-filter> <intent-filter> <action android:name= "Android.intent.action.PACKAGE_ADDED"/> <action Andro Id:name= "Android.intent.action.PACKAGE_REMOVED"/> <data android:scheme= "package"/> &lt ;! --Attention!! This sentence must be added, otherwise not receive broadcast--</intent-filter> </receiver> <activity A Ndroid:name= ". Xxxactivity" Android:labEl= "XXX" > <intent-filter> <action android:name= "android.intent.action. MAIN "/> <category android:name=" Android.intent.category.LAUNCHER "/> </ intent-filter> </activity> </application> <uses-permission android:name= "Android.per Mission. INTERNET "/> <uses-permission android:name=" Android.permission.RESTART_PACKAGES "/> <uses-p Ermission android:name= "Android.permission.RECEIVE_BOOT_COMPLETED"/> </manifest>

Android Technology Point notes-(Install app and uninstall app broadcast)