吐司不在服務

-2

我嘗試創建我的第一個服務，當然沒有成功。但這個應用程序成功編譯，並沒有給AndroidMonitor的任何錯誤。總之，按鈕沒有反應按下。我加入到Android清單需要行：吐司不在服務

<service android:name=".MyService"></service>

ClientActivity

package com.example.servicetest; 

import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 

public class ClientActivity extends Activity { 
    private Button btnStartService; 
    private Button btnStopService; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     btnStartService = (Button) findViewById(R.id.btnStartService); 
     btnStopService = (Button) findViewById(R.id.btnStopService); 
     initButtonsOnClick(); 
    } 

    private void initButtonsOnClick() { 
     OnClickListener listener = new OnClickListener() { 
      public void onClick(View v) { 
       switch (v.getId()) { 
        case R.id.btnStartService: 
         startMyService(); 
         break; 
        case R.id.btnStopService: 
         stopMyService(); 
         break; 
        default: 
         break; 
       } 
      } 
     }; 
     btnStartService.setOnClickListener(listener); 
     btnStopService.setOnClickListener(listener); 
    } 

    private void startMyService() { 
     Intent serviceIntent = new Intent(this, MyService.class); 
     startService(serviceIntent); 
    } 

    private void stopMyService() { 
     Intent serviceIntent = new Intent(this, MyService.class); 
     stopService(serviceIntent); 
    } 
}

爲MyService

package com.example.servicetest; 

import android.app.Service; 
import android.content.Intent; 
import android.os.IBinder; 
import android.util.Log; 
import java.util.Timer; 
import java.util.TimerTask; 
import android.widget.Toast; 

public class MyService extends Service { 
    private Toast toast; 
    private Timer timer; 
    private TimerTask timerTask; 
    private class MyTimerTask extends TimerTask { 
     @Override 
     public void run() { 
      Toast.makeText(getApplicationContext(), "Your service is still working", Toast.LENGTH_SHORT).show(); 
     } 
    } 


    private void writeToLogs(String message) { 
     Log.d("HelloServices", message); 
    } 

    @Override 
    public void onCreate() { 
     super.onCreate(); 
     writeToLogs("Called onCreate() method."); 
     timer = new Timer(); 
     Toast.makeText(getApplicationContext(), "", Toast.LENGTH_SHORT).show(); 
    } 

    @Override 
    public int onStartCommand(Intent intent, int flags, int startId) { 
     writeToLogs("Called onStartCommand() methond"); 
     clearTimerSchedule(); 
     initTask(); 
     timer.scheduleAtFixedRate(timerTask, 4 * 1000, 4 * 1000); 
     Toast.makeText(getApplicationContext(), "Your service has been started", Toast.LENGTH_SHORT).show(); 
     return super.onStartCommand(intent, flags, startId); 
    } 

    private void clearTimerSchedule() { 
     if(timerTask != null) { 
      timerTask.cancel(); 
      timer.purge(); 
     } 
    } 

    private void initTask() { 
     timerTask = new MyTimerTask(); 
    } 

    @Override 
    public void onDestroy() { 
     writeToLogs("Called onDestroy() method"); 
     clearTimerSchedule(); 
     Toast.makeText(getApplicationContext(), "Your service has been stopped", Toast.LENGTH_SHORT).show(); 
     super.onDestroy(); 
    } 

    @Override 
    public IBinder onBind(Intent arg0) { 
     return null; 
    } 
}

來源

2017-07-04 philips

做'敬酒= Toast.makeText（getApplicationContext（）「」，Toast.LENGTH_SHORT）;' –

仍然沒有工作 – philips

Toast總是與Application的主線程一起工作。所以你必須確定你在主線程中使用線程。

而如果你想使用吐司服務，那麼你必須使用處理程序。

請線程檢查出下面的例子對處理程序：

private Context mContext; 

@Override 
    public int onStartCommand(Intent intent, int flags, int startId) { 
     mContext=getApplicationContext();//Get the context here 
    } 

    //Use this method to show toast 
    void showToast(){ 
     if(mContext != null){ 
     Handler handler = new Handler(Looper.getMainLooper()); 
     handler.post(new Runnable() { 
      @Override 
      public void run() 
      { 
        Toast.makeText(mContext, "Display your message here", Toast.LENGTH_SHORT)show(); 
      } 
     }); 

    } 
}

來源

2017-07-04 06:18:23 KishuDroid

public class MyService extends Service { 

    private Timer timer; 
    private TimerTask timerTask; 

    @Override 
    public void onCreate() { 
     super.onCreate(); 
     startTimer(); 
    } 

    @Override 
    public int onStartCommand(Intent intent, int flags, int startId) { 
     super.onStartCommand(intent, flags, startId); 
//  startTimer(); 
//  sendNotification(); 
     return START_STICKY; 
    } 


    public void startTimer() { 
     //set a new Timer 
     timer = new Timer(); 

     //initialize the TimerTask's job 
     initializeTimerTask(); 

     //schedule the timer, to wake up every 10 second 
     timer.schedule(timerTask, 5000, 5000); // 
    } 

    /** 
    * it sets the timer to print the counter every x seconds 
    */ 
    public void initializeTimerTask() { 
     timerTask = new TimerTask() { 
      public void run() { 
//    Log.e("in timer", "in timer ++++ " + (counter++)); 

       Handler handler = new Handler(Looper.getMainLooper()); 
       handler.post(new Runnable() { 

        @Override 
        public void run() { 
         Toast.makeText(getApplicationContext(), 
           ""+ (counter++), 
           Toast.LENGTH_SHORT).show(); 
        } 
       }); 
//    Toast.makeText(SensorService.this, ""+ (counter++), Toast.LENGTH_SHORT).show(); 
      } 
     }; 
    } 

    /** 
    * not needed 
    */ 
    public void stoptimertask() { 
     if (timer != null) { 
      timer.cancel(); 
      timer = null; 
     } 
    } 


    @Override 
    public void onDestroy() { 
     super.onDestroy(); 
    } 

    @Override 
    public IBinder onBind(Intent arg0) { 
     return null; 
    } 
}

用這個按鈕點擊

public class ClientActivity extends Activity { 

    private Button btnStartService; 
    private Button btnStopService; 

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

     btnStartService = (Button) findViewById(R.id.btnStartService); 
     btnStopService = (Button) findViewById(R.id.btnStopService); 

     btnStartService.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Intent serviceIntent = new Intent(this, MyService.class); 
       startService(serviceIntent); 
      } 
     }); 

     btnStopService.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Intent serviceIntent = new Intent(this, MyService.class); 
       stopService(serviceIntent); 
      } 
     }); 
    } 

}

來源

2017-07-04 06:01:58

但現在還不是服務？ – philips

檢查現在的代碼。 –

A服務是可以在後臺執行長時間運行的操作的應用組件，並且它不提供一個用戶界面。 - 來自Android官方文檔。

現在，因爲服務沒有用戶界面，所以在使用服務時不能顯示敬酒。

來源

2017-07-04 06:21:47 Shrikant

它不是真的 - 你可以在'Services'中使用'Toasts'，但它們是來自UI線程的'show（）'n - 例如嘗試從'onStartCommand'顯示它們 – pskink

Handler handler = new Handler(Looper.getMainLooper()); 
handler.post(new Runnable() { 

    @Override 
    public void run() { 
     Toast.makeText(getApplicationContext(), 
         "helllo", 
         Toast.LENGTH_SHORT).show();    
    } 
});

來源

2017-07-04 11:11:10

添加在您的服務下面的代碼

if (getActivity()!=null){ 
         getActivity().runOnUiThread(new Runnable() { 
          @Override 
          public void run() { 
           Toast.makeText(getActivity(), "Your Text", Toast.LENGTH_SHORT).show(); 

          } 
         }); 
        }

來源

2017-07-11 12:19:02 Avinash

吐司不在服務

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