如何在Android处于后台APP时激活广播接收器？

Question

我在我的应用程序中使用广播接收器，该应用程序在应用程序打开时处于活动状态，并且应用程序处于关闭状态。我想要的是仅在应用程序打开时以及特定活动时激活此广播接收器。

这是我的

public class Receiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
    // Check if the application is install or uninstall and display the message accordingly
    if (intent.getAction().equals("android.intent.action.PACKAGE_ADDED")) {
        // Application Install
        Log.e("Package Added:-", intent.getData().toString());

    } else if (intent.getAction().equals("android.intent.action.PACKAGE_REMOVED")) {

        Log.e("Package Removed:-", intent.getData().toString());
    } else if (intent.getAction().equals("android.intent.action.PACKAGE_REPLACED")) {
        Log.e("Package Replaced:-", intent.getData().toString());
    }


}

Answer 1

例如：

@Override
protected void onPause () {

    // Unregister since the activity is not visible
    LocalBroadcastManager.getInstance(this).unregisterReceiver(mReceiver);
    super.onPause();
}

@Override
protected void onResume () {
    super.onResume();

    // Register mMessageReceiver to receive messages.
    LocalBroadcastManager.getInstance(this).registerReceiver(mReceiver,
                                                             new IntentFilter(
                                                                     YourBroadcastReceiver.class
                                                                             .getSimpleName()));
}