Startup application

Code modification method

Non-launcher

• Add the following content to the AndroidManifest.xml in the application source code

  package="com.example.testfile"
  android:sharedUserId="android.uid.system">

  <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

  <receiver android:name="com.example.testfile.BootBroadcastReceiver" >
      <intent-filter>
          <action android:name="android.intent.action.BOOT_COMPLETED" />
          <category android:name="android.intent.category.LAUNCHER" />
     </intent-filter>
  </receiver>

• Add the code for broadcast reception BootBroadcastReceiver.java, such as

  package com.example.testfile;
  
  import android.content.BroadcastReceiver;
  import android.content.Context;
  import android.content.Intent;
  import android.util.Log;
  import android.widget.Toast;
  
  public class BootBroadcastReceiver extends BroadcastReceiver{
      private static final String TAG = "sjft";
  
      public static final String EXTRA_VOLUME_STATE =
              "android.os.storage.extra.VOLUME_STATE";
  
      public static final int STATE_UNMOUNTED = 0;
      public static final int STATE_CHECKING = 1;
      public static final int STATE_MOUNTED = 2;
      public static final int STATE_MOUNTED_READ_ONLY = 3;
      public static final int STATE_FORMATTING = 4;
      public static final int STATE_EJECTING = 5;
      public static final int STATE_UNMOUNTABLE = 6;
      public static final int STATE_REMOVED = 7;
      public static final int STATE_BAD_REMOVAL = 8;
  
      @Override
      public void onReceive(Context context, Intent intent) {
          // TODO Auto-generated method stub
          String action = intent.getAction();
          if (action.equals("android.intent.action.PACKAGE_REPLACED")){
              String packageName = intent.getData().getSchemeSpecificPart();
              Log.v(TAG,"BootBroadcastReceiver packageName:"+packageName);
              if(context.getPackageName().equals(packageName)){
                  Intent launchIntent = new Intent(context, MainActivity.class);//Restart the app 
                  //If you don’t want to write the startup Activity, you can also get the default startup Activity by the following method 
                  //Intent launchIntent = context.getPackageManager().getLaunchIntentForPackage(packageName);
                  launchIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                  context.startActivity(launchIntent);
              }
          } else if (action.equals("android.intent.action.BOOT_COMPLETED")){
              String packageName = intent.getData().getSchemeSpecificPart();
              Log.v(TAG,"BootBroadcastReceiver packageName:"+packageName);
              if(context.getPackageName().equals(packageName)){
                  Intent launchIntent = new Intent(context, MainActivity.class);//Restart the app 
                  //If you don’t want to write the startup Activity, you can also get the default startup Activity by the following method 
                  //Intent launchIntent = context.getPackageManager().getLaunchIntentForPackage(packageName);
                  launchIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                  context.startActivity(launchIntent);
              }
          } 
      }
  }

• app system signature (signature file)

• start app once

Launcher

• Delete or not compile the Launcher application in the SDK

• Add the following content to the first activity started in AndroidManifest.xml in the application source code

  <intent-filter>
      <action android:name="android.intent.action.MAIN" />
      <category android:name="android.intent.category.LAUNCHER" />
  </intent-filter>