将字符串从服务发送到活动 [英] Send string from service to activity

问题描述

我正在尝试通过广播将字符串从服务发送到我的主要活动. 我在一些论坛中读到，有两种使用广播的方法.一种是在清单中注册活动，第二种方法是在本地活动中进行. 我想知道如何使用第二种方法.我曾尝试这样做，但不幸的是我没有成功.

I'm trying to send string from service to my main activity with broadcast. I have read in a few forums that there are 2 ways to use broadcast. One is to register the activity in the manifest and the second way is to do it on the activity, local. I would like to know how I can use the second way. I have tried to do it but unfortunately I did not succeed.

请告诉我我在做错什么.

Please tell me what I'm doing wrong.

服务代码

   public class MyGcmListenerService extends GcmListenerService {

private static final String TAG = "MyGcmListenerService";

// [START receive_message]
@Override
public void onMessageReceived(String from, Bundle data) {
    String typemessage = data.getString("typemessage"); // typeMessage = 0 or 1 = lock or unlock
    String datamessage = data.getString("datamessage"); // dataMessage = time and message that says lock or unlock

    Log.d(TAG, "TypeMessage: " + typemessage);
    Log.d(TAG,"DataMesaage:"+ datamessage);

    Intent in = new Intent();
    in.putExtra("TYPE",typemessage);
    in.setAction("NOW");
    sendBroadcast(in);
  ...

主要活动代码

    public class MainActivity extends Activity implements SensorEventListener, Listen {

        private BroadcastReceiver statusReceiver;
        private IntentFilter mIntent;


    Sensor accelerometer;
    SensorManager sm;
    TextView acceleration;
    SendValues sv;
    int counter3 = 0;
    int counter5 = 0;

    private static final String TAG = "MainActivity";

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

         mIntent = new IntentFilter("NOW");

      // this.registerReceiver(,new IntentFilter("status"));

        sm = (SensorManager) getSystemService(SENSOR_SERVICE);
        sm.registerListener(this,accelerometer, SensorManager.SENSOR_DELAY_NORMAL);
        accelerometer = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);

        acceleration = (TextView) findViewById(R.id.sensorTxt);

        statusReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {

                String type = intent.getStringExtra("message");  //get the type of message from MyGcmListenerService 1 - lock or 0 -Unlock
                sm = (SensorManager) getSystemService(SENSOR_SERVICE);
                accelerometer = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
                Log.d(TAG, "Status: " + type);
                if (type == "1") // 1 == lock
                {
                    Toast.makeText(getApplication(), "Lock", Toast.LENGTH_LONG).show();
                } else {
                    Toast.makeText(getApplication(), "UNLOCK", Toast.LENGTH_LONG).show();
                }
            }

        };
    }

        @Override
         protected void onResume()
         {
            super.onResume();
            registerReceiver(statusReceiver,mIntent);
          }

    @Override
    protected void onPause() {
        if(mIntent != null) {
            unregisterReceiver(statusReceiver);
            mIntent = null;
        }
        super.onPause();
    }


----------

好吧，我不知道自己在做什么错，还有另一个问题，我需要在

Well I don't know what I'm doing wrong, and another question, what do I need to put in the

在动作集中(我可以在此处放置任何字符串/动作，这是什么意思?动作是什么意思?我只想将字符串发送给主要活动，我应该做什么动作?")

In set Action("I can put here any string/action that I what? And what does it mean action? I just want to send string to the main activity, what action should I do"?)

推荐答案

LocalBroadcastManager是解决此类问题的最佳解决方案.我已经将LocalBroadcastManager实现为您现有的.这很容易.希望它能工作.您的代码将如下所示

LocalBroadcastManager is the best solution for solving this type of problem. I have implemented LocalBroadcastManager to your existing. Its very easy. Hope it will work. You code will look something like this

private BroadcastReceiver statusReceiver;
private IntentFilter mIntent;
Sensor accelerometer;
SensorManager sm;
TextView acceleration;
SendValues sv;
int counter3 = 0;
int counter5 = 0;

private static final String TAG = "MainActivity";

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

     //mIntent = new IntentFilter("NOW");

  // this.registerReceiver(,new IntentFilter("status"));

    sm = (SensorManager) getSystemService(SENSOR_SERVICE);
    sm.registerListener(this,accelerometer, SensorManager.SENSOR_DELAY_NORMAL);
    accelerometer = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);

    acceleration = (TextView) findViewById(R.id.sensorTxt);

}

private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        String type = intent.getStringExtra("message");  //get the type of message from MyGcmListenerService 1 - lock or 0 -Unlock
        sm = (SensorManager) getSystemService(SENSOR_SERVICE);
        accelerometer = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
        Log.d(TAG, "Status: " + type);
        if (type == "1") // 1 == lock
        {
            Toast.makeText(getApplication(), "Lock", Toast.LENGTH_LONG).show();
        } else {
            Toast.makeText(getApplication(), "UNLOCK", Toast.LENGTH_LONG).show();
        }
    }
};

@Override
 protected void onResume()
 {
    super.onResume();
    //registerReceiver(statusReceiver,mIntent);
    LocalBroadcastManager.getInstance(MainActivity.this).registerReceiver(broadcastReceiver, new IntentFilter("NOW"));
  }

@Override
protected void onPause() {
    if(mIntent != null) {
        unregisterReceiver(statusReceiver);
        mIntent = null;
    }
    super.onPause();
}

并通过类似这样的推送通知传递您的价值

And pass your value from push notification something like this

Intent in = new Intent();
in.putExtra("TYPE",typemessage);
in.setAction("NOW");
//sendBroadcast(in);
LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(in);

这篇关于将字符串从服务发送到活动的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！