使用Java定义一个android APP， 1.在定义一个类里面监听广播MyBroadcastReceiver； 2.当收到MyBroadcastReceiver后，启动的service Modemdebugservice 3.同时定义一个5分钟的计时器，并在计时器5分钟结束后，停止modemdebugservice的运行； 4.定义一个属性监听Modemdebugservice，true的时候，Modemdebugservice开启，false的时候，Modemdebugservice关闭

好的，以下是一个示例代码：

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Handler;
import android.os.Message;

public class MyActivity extends AppCompatActivity {
    private MyBroadcastReceiver myBroadcastReceiver;
    private boolean isModemDebugServiceEnabled = false;
    private final int STOP_MODEM_DEBUG_SERVICE = 1;
    private Handler mHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case STOP_MODEM_DEBUG_SERVICE:
                    stopModemDebugService();
                    break;
            }
        }
    };

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

        myBroadcastReceiver = new MyBroadcastReceiver();
        IntentFilter intentFilter = new IntentFilter("com.example.mybroadcastreceiver.MY_BROADCAST");
        registerReceiver(myBroadcastReceiver, intentFilter);
    }

    private class MyBroadcastReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent.getAction().equals("com.example.mybroadcastreceiver.MY_BROADCAST")) {
                startModemDebugService();
                startTimer();
            }
        }
    }

    private void startModemDebugService() {
        if (!isModemDebugServiceEnabled) {
            isModemDebugServiceEnabled = true;
            Intent intent = new Intent(this, ModemDebugService.class);
            startService(intent);
        }
    }

    private void stopModemDebugService() {
        if (isModemDebugServiceEnabled) {
            isModemDebugServiceEnabled = false;
            Intent intent = new Intent(this, ModemDebugService.class);
            stopService(intent);
        }
    }

    private void startTimer() {
        mHandler.sendEmptyMessageDelayed(STOP_MODEM_DEBUG_SERVICE, 5 * 60 * 1000); // 5 minutes
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        unregisterReceiver(myBroadcastReceiver);
        stopModemDebugService();
        mHandler.removeMessages(STOP_MODEM_DEBUG_SERVICE);
    }
}

其中，MyBroadcastReceiver 监听广播 "com.example.mybroadcastreceiver.MY_BROADCAST"，当接收到广播时，启动 ModemDebugService 服务，并启动一个 5 分钟的计时器，在计时器结束时停止 ModemDebugService 服务。isModemDebugServiceEnabled 属性监听 ModemDebugService 服务的状态，当为 true 时表示服务正在运行，为 false 时表示服务已经停止。在 Activity 销毁时需要停止 ModemDebugService 服务并移除计时器的消息。