अनुसूचितExecutorService सेवा

Question

के अंदर केवल एक बार चलाता है मैं अपनी सेवा के अंदर ScheduledExecutorService चला रहा हूं जो पृष्ठभूमि में छवि लेता है। ScheduledExecutorService केवल एक बार चलने का मतलब है कि कार्य में पारित अंतराल के बाद केवल एक तस्वीर लेना। बिल्कुल कोई त्रुटि नहीं दिख रही है। बाद मेरी Service

package com.anawaz.spy; 

import java.io.File; 
import java.io.FileNotFoundException; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.util.concurrent.Executors; 
import java.util.concurrent.ScheduledExecutorService; 
import java.util.concurrent.ScheduledFuture; 
import java.util.concurrent.TimeUnit; 

import android.app.Service; 
import android.content.Intent; 
import android.hardware.Camera; 
import android.hardware.Camera.PictureCallback; 
import android.hardware.Camera.ShutterCallback; 
import android.os.IBinder; 
import android.util.Log; 

public class CamService extends Service { 

    private static final String TAG = "TAG"; 

    private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1); 

    Camera camera; 
    ScheduledFuture beeperHandle; 

    /* Service Life cycle Overrides */ 
    @Override 
    public void onCreate() { 
     super.onCreate(); 
     camera = Camera.open(); 
     try { 
      camera.setPreviewDisplay(null); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
     //takePicsPeriodically(MainActivity.getSpInt(MainActivity.SP_Period)); 
     takePicsPeriodically(5); 
    } 

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

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

    // @Override 
    // public IBinder onBind(Intent arg0) { 
    // return myRemoteServiceStub; 
    // } 
    // /* ----------------------------------- */ 
    // 
    // private IMyRemoteService.Stub myRemoteServiceStub = new 
    // IMyRemoteService.Stub() { 
    // 
    // /* Basic Service Methods */ 
    // public boolean isCollecting() { 
    // return (beeperHandle != null); 
    // } 
    // /* ------------------------- */ 
    // }; 

    public void takePicsPeriodically(long period) { 
     final Runnable beeper = new Runnable() { 
      public void run() { 
       Log.d("TAG", "New Picture Taken"); 
       camera.takePicture(shutterCallback, rawCallback, jpegCallback); 
      } 
     }; 
     camera.startPreview(); 
     beeperHandle = scheduler.scheduleAtFixedRate(beeper, period, period,TimeUnit.SECONDS); 
    } 

    public void stopPics() { 
     beeperHandle.cancel(true); 
     beeperHandle = null; 
     camera.stopPreview(); 
     camera.release(); 
     camera = null; 
    } 

    /* Camera Call backs */ 
    ShutterCallback shutterCallback = new ShutterCallback() { 
     public void onShutter() { 
      Log.d(TAG, "onShutter'd"); 
     } 
    }; 

    /** Handles data for raw picture */ 
    PictureCallback rawCallback = new PictureCallback() { 
     public void onPictureTaken(byte[] data, Camera camera) { 
      Log.d(TAG, "onPictureTaken - raw"); 
     } 
    }; 

    /** Handles data for j peg picture */ 
    PictureCallback jpegCallback = new PictureCallback() { 
     public void onPictureTaken(byte[] data, Camera camera) { 
      FileOutputStream outStream = null; 
      try { 
       // write to local sand box file system 
       // outStream = 
       // CameraDemo.this.openFileOutput(String.format("%d.jpg", 
       // System.currentTimeMillis()), 0); 
       // Or write to s d card 
       File mFolder; 
       mFolder = new File("/sdcard/Spy/"); 
       if (!mFolder.exists()) { 
        mFolder.mkdir(); 
       } 
       outStream = new FileOutputStream(String.format(
         "/sdcard/Spy/Image_%d.jpg", System.currentTimeMillis())); 
       outStream.write(data); 
       outStream.close(); 
       Log.d(TAG, "onPictureTaken - wrote bytes: " + data.length); 
      } catch (FileNotFoundException e) { 
       e.printStackTrace(); 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } finally { 
      } 
      Log.d(TAG, "onPictureTaken - jpeg"); 
     } 
    }; 

} 

नहीं Logcat का कोड है क्योंकि किसी भी त्रुटि प्राप्त नहीं हो रहा है। तस्वीर लेने के बाद भी सेवा चल रही है। क्या मैं गलत हूं?

Answer 1

इस पोस्ट को पढ़ने के बाद http://code.nomad-labs.com/2011/12/09/mother-fk-the-scheduledexecutorservice/ मैंने try catch ब्लॉक की कोशिश की। और पाया कि camera.takePicture(shutterCallback, rawCallback, jpegCallback); अपवाद फेंक रहा था। जो मेरी गलती के कारण था कि मैं पहली तस्वीर लेने के बाद पूर्वावलोकन शुरू नहीं कर रहा था। इस जवाब का संदर्भ लें। https://stackoverflow.com/a/21728454/1770916

मेरी सेवा का अद्यतन कार्य कोड निम्नलिखित है।

package com.anawaz.spy; 

import java.io.File; 
import java.io.FileNotFoundException; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.util.concurrent.Executors; 
import java.util.concurrent.ScheduledExecutorService; 
import java.util.concurrent.ScheduledFuture; 
import java.util.concurrent.TimeUnit; 

import android.app.Service; 
import android.content.Intent; 
import android.hardware.Camera; 
import android.hardware.Camera.PictureCallback; 
import android.hardware.Camera.ShutterCallback; 
import android.os.IBinder; 
import android.util.Log; 

public class CamService extends Service { 

    private static final String TAG = "TAG"; 

    private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1); 

    Camera camera; 
    ScheduledFuture beeperHandle; 

    /* Service Life cycle Overrides */ 
    @Override 
    public void onCreate() { 
     super.onCreate(); 
     camera = Camera.open(); 
     try { 
      camera.setPreviewDisplay(null); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
     File mFolder = new File("/sdcard/Spy/"); 
     if (!mFolder.exists()) { 
      mFolder.mkdir(); 
     } 
     takePicsPeriodically(MainActivity.getSpInt(MainActivity.SP_Period)); 
     //takePicsPeriodically(5); 
    } 

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

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

    public void takePicsPeriodically(long period) { 
     camera.startPreview(); 
     beeperHandle = scheduler.scheduleAtFixedRate(beeper,period, period,TimeUnit.SECONDS); 
    } 

    final Runnable beeper = new Runnable() { 
     public void run() { 
      Log.d("TAG", "New Picture Taken"); 
      try { 
       camera.startPreview(); 
       camera.takePicture(shutterCallback, rawCallback, jpegCallback); 
      }catch (Exception e) { 
       Log.e("TAG","error in executing: It will no longer be run!: "+e.getMessage()); 
       e.printStackTrace(); 
      } 
     } 
    }; 
    public void stopPics() { 
     beeperHandle.cancel(true); 
     beeperHandle = null; 
     camera.stopPreview(); 
     camera.release(); 
     camera = null; 
    } 

    /* Camera Call backs */ 
    final ShutterCallback shutterCallback = new ShutterCallback() { 
     public void onShutter() { 
      Log.d(TAG, "onShutter'd"); 
     } 
    }; 

    /** Handles data for raw picture */ 
    final PictureCallback rawCallback = new PictureCallback() { 
     public void onPictureTaken(byte[] data, Camera camera) { 
      Log.d(TAG, "onPictureTaken - raw"); 
     } 
    }; 

    /** Handles data for j peg picture */ 
    final PictureCallback jpegCallback = new PictureCallback() { 
     public void onPictureTaken(byte[] data, Camera camera) { 
      FileOutputStream outStream = null; 
      try { 
       // write to local sand box file system 
       // outStream = 
       // CameraDemo.this.openFileOutput(String.format("%d.jpg", 
       // System.currentTimeMillis()), 0); 
       // Or write to s d card 

       outStream = new FileOutputStream(String.format(
         "/sdcard/Spy/Image_%d.jpg", System.currentTimeMillis())); 
       outStream.write(data); 
       outStream.close(); 
       Log.d(TAG, "onPictureTaken - wrote bytes: " + data.length); 
      } catch (FileNotFoundException e) { 
       e.printStackTrace(); 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } finally { 
      } 
      Log.d(TAG, "onPictureTaken - jpeg"); 
     } 
    }; 

}