MyService.java

Question

我使用以下代码注册接收器，但它显示错误说明语法错误或标记，错位的构造函数这是代码此外，我希望即使应用程序关闭也能运行

MyService.java

import android.app.Service;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.IBinder;

public class MyService extends Service {
@Override
public void onCreate() {
    super.onCreate();


    if (!registered) {
        MyReceiver mybroadcast = new MyReceiver(){
        registerReceiver(mybroadcast, new IntentFilter(Intent.ACTION_SCREEN_ON));
        registerReceiver(mybroadcast, new IntentFilter(Intent.ACTION_SCREEN_OFF));
    }    
}

@Override
public IBinder onBind(Intent arg0) {
    // TODO Auto-generated method stub
    return null;
}
}

Answer 1

    public class MyService extends Service {
    @Override
    public void onCreate() {
        super.onCreate();


        if (!registered) {

            MyBroadcast mybroadcast=new MyBroadcast();

            registerReceiver(mybroadcast, new IntentFilter(Intent.ACTION_SCREEN_ON));
            registerReceiver(mybroadcast, new IntentFilter(Intent.ACTION_SCREEN_OFF));

    }
}

    @Override
    public IBinder onBind(Intent arg0) {
        // TODO Auto-generated method stub
        return null;
    }

    private class MyBroadcast extends BroadcastReceiver {

            @Override
            public void onReceive(Context context, Intent intent) {
                     //TODO some code here
                    }
                }
    }

Answer 2

您必须首先定义接收器，而不是注册它：

BroadcastReceiver mybroadcast = new BroadcastReceiver (){
@Override
        public void onReceive(Context context, Intent intent) {
//define what you want the receiver to do when it is called
    }    


};

然后注册：

registerReceiver(mybroadcast, new IntentFilter(Intent.ACTION_SCREEN_OFF));

在你的情况下你想要放两个IntentFilter，所以这样做：

IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction((Intent.ACTION_SCREEN_OFF));
intentFilter.addAction((Intent.ACTION_SCREEN_ON));
registerReceiver(mybroadcast, intentFilter);

如果您不取消注册接收器，并且您希望服务继续工作，您将获得新的异常或警告，因此请在onDestroy中取消注册接收器：

/*
 * (non-Javadoc)
 * 
 * @see android.app.Service#onDestroy()
 */
@Override
public void onDestroy() {
    unregisterReceiver(mybroadcast);        
    super.onDestroy();
}

Answer 3

onCreate()方法错过了右括号}。格式化可帮助您解决这些错误。你还没有完全告诉我们你做了什么。请按照link了解

寄存器接收器中的错误解决方案

MyService.java

3 个答案: