Android,检测其他应用程序何时启动

<receiver android:name=".MyBroadcastReceiver">
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED" />
        <action android:name="android.intent.action.PACKAGE_ADDED" />
        <data android:scheme="package" />
    </intent-filter>
</receiver>

public class MyBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        
        if (action.equals(Intent.ACTION_BOOT_COMPLETED)) {
            // 设备启动完成时执行的操作
        } else if (action.equals(Intent.ACTION_PACKAGE_ADDED)) {
            // 安装新应用程序时执行的操作
        }
    }
}

public class MainActivity extends AppCompatActivity {
    private MyBroadcastReceiver receiver;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        receiver = new MyBroadcastReceiver();
        IntentFilter filter = new IntentFilter();
        filter.addAction(Intent.ACTION_BOOT_COMPLETED);
        filter.addAction(Intent.ACTION_PACKAGE_ADDED);
        registerReceiver(receiver, filter);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        unregisterReceiver(receiver);
    }
}