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>

Code modification method​

Non-launcher​

Launcher​

Code modification method

Non-launcher

Launcher