java - 从 BroadcastReceiver 调用 MainApplication 方法

Question

我有一个带有 Activity、服务和广播接收器的 Android 应用程序。我从服务中调用了一个有效的广播 Intent 。广播接收器正确接收 Intent 。

但是我如何从我的类 MyBroadcastReceiver 访问类 MainApplication 的方法？

((MainApplication)getApplication()).myMethod(); 给出错误消息“无法解析方法”

//Call from the service-class
private void sendBroadcast() {
    Log.d(TAG, "Sending Broadcast Intent");
    Intent intent = new Intent();
    intent.setAction("com.package.name.MyBroadcastReceiver");
    intent.addFlags(Intent.FLAG_INCLUDE_STOPPED_PACKAGES);
    sendBroadcast(intent);
}


//receiver class
public class MyBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        //Doesn't work - "cannot resolve method"
        ((MainApplication)getApplication()).myMethod();
        //Doesn't work either
        ((MainApplication)context.getApplication()).myMethod();
        Toast.makeText(context, "Intent Detected.", Toast.LENGTH_LONG).show();
    }
}



//Main Application Class
public class MainApplication extends Application{

    public void myMethod(){

    }

}

致以诚挚的问候

Answer 1

将上下文转换为 Activity:

//receiver class
public class MyBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Activity activity = (Activity) context;
        ((MainApplication)activity.getApplication()).myMethod();
        Toast.makeText(context, "Intent Detected.", Toast.LENGTH_LONG).show();
    }
}