android开机自动启动app的解决方法

public class BootBroadcastReceiver extends BroadcastReceiver {
    static final String ACTION = "android.intent.action.BOOT_COMPLETED";

    @Override
    public void onReceive(Context context, Intent intent) {

        //屏幕唤醒
        PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
        PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.ACQUIRE_CAUSES_WAKEUP
                | PowerManager.SCREEN_DIM_WAKE_LOCK, "BootBroadcastReceiver");
        wl.acquire();

        //屏幕解锁
        KeyguardManager km = (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE);
        KeyguardManager.KeyguardLock kl = km.newKeyguardLock("BootBroadcastReceiver");
        kl.disableKeyguard();

        //启动APP
        if (intent.getAction().equals(ACTION)) {
            Intent intent = new Intent(context, LaunchActivity.class);  // 要启动的Activity
            if (!(context instanceof Activity)) {
                //如果不是在Activity中显示Activity，必须要设置FLAG_ACTIVITY_NEW_TASK标志
                intent .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            }
            context.startActivity(intent );
        }
    }

}  

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

<receiver
     android:name=".receiver.BootBroadcastReceiver"
     android:enabled="true"
     android:exported="true"
     android:permission="android.permission.RECEIVE_BOOT_COMPLETED">
     <intent-filter>
          <action android:name="android.intent.action.BOOT_COMPLETED"/>
          <action android:name="android.intent.action.QUICKBOOT_POWERON"/>
          <category android:name="android.intent.category.DEFAULT"/>
      </intent-filter>
</receiver>