title: file.delete() is not working
body: <p>In my application, I am calling a <code>Service</code> which performs the
  <code>data-Uploading</code> to the server and after successfully upload, I want to
  delete that uploaded file as if I don't delete that, it will upload
  the same file as many times service runs. </p>
  
  <p>To delete the uploaded file, I am using this method:</p>
  
  <pre><code>String path = fileToBeUploaded.getPath();
  File file = new File(path);
  boolean delStatus= file.delete();
  </code></pre>
  
  <p>but it is not working. Please let me know what mistake I am doing here. </p>
  
  <p>Here is my complete service class:</p>
  
  <pre><code> public class UploadSurveyService extends Service implements SilentUploadSurveyListener{
  
     private static FileCache fileCache;
     private static boolean IS_REFRESHING_DATA = false;
     private static boolean NEXT_LAUNCH_SET = false;
     private  static boolean isFirstTime = true;
  
     private UploadSurveyAsyncTask updateLocationAsyncTask;
     private File fileToBeUploaded;
  
     public UploadSurveyService() {
     }
  
     @Override
     public IBinder onBind(Intent intent) {
       // TODO: Return the communication channel to the service.
       return null;
     }
  
     @Override
     public void onCreate() {
       super.onCreate();
       if(fileCache == null)
         fileCache = new FileCache(this);
  
       System.out.println("upload survey service created");
     }
  
     @Override
     public int onStartCommand(Intent intent, int flags, int startId) {
       System.out.println("upload service on start command");
       if(isFirstTime &amp;&amp; !NEXT_LAUNCH_SET){
         isFirstTime=false;
         scheduleNextLaunch();
       }
       else if(!IS_REFRESHING_DATA &amp;&amp; intent.hasExtra("FROM_ALARM")){
         if (Methods.checkInternetConnection(getApplicationContext(), false)) {
           IS_REFRESHING_DATA = true;
  
           System.out.println("service is checking the condition");
  
           fileToBeUploaded=  fileCache.getFileForUploading();
  
           if(fileToBeUploaded==null || !fileToBeUploaded.exists()){
             onUploadSurvey(false, null);
           } else {
  
             IS_REFRESHING_DATA=true;
             updateLocationAsyncTask = new UploadSurveyAsyncTask(getApplicationContext(),fileToBeUploaded, this);
             updateLocationAsyncTask.execute();
             Log.d("SK SERVICE", "executing upload survey task");
           }
         }
       } else {
          Log.d("SF SERVICE", "no internet");
          onUploadSurvey(false, null);
       }
       return super.onStartCommand(intent, flags, startId);
     }
  
     private void scheduleNextLaunch(){
  
       Calendar futureCalendar = Calendar.getInstance();
       Calendar currentCalendar = Calendar.getInstance();
       futureCalendar.set(Calendar.MINUTE,currentCalendar.get(Calendar.MINUTE) + 5);
       futureCalendar.set(Calendar.SECOND, 0);
       futureCalendar.set(Calendar.MILLISECOND, 0);
       //futureCalendar.set(Calendar.HOUR_OF_DAY,currentCalendar.get(Calendar.HOUR_OF_DAY)+1);
  
       AlarmManager alarm = (AlarmManager)getSystemService(ALARM_SERVICE);
       Intent pendingIntent= new Intent(this, UploadSurveyService.class);
       pendingIntent.putExtra("FROM_ALARM", true);
       alarm.set( alarm.RTC_WAKEUP,futureCalendar.getTimeInMillis(),PendingIntent.getService(this, 0, pendingIntent, 0));
       NEXT_LAUNCH_SET = true;
       Log.d("SF Silent Upload", "repeat set ok");
     }
  
     @Override
     public void onUploadSurvey(boolean status, String message) {
  
       updateLocationAsyncTask = null;
  
       IS_REFRESHING_DATA = false;
  
       Log.d("SF SERVICE", "after finish async task");
       scheduleNextLaunch();
  
       if(status) {
         String path = fileToBeUploaded.getPath();
         File file = new File(path);
         boolean delStatus= file.delete();
         Toast.makeText(UploadSurveyService.this, "file deleted" + delStatus, Toast.LENGTH_SHORT).show();
       }
     }
   }
  </code></pre>
  
  <blockquote>
    <p>I also have declared the permission in manifest:</p>
  </blockquote>
  
  <pre><code>&lt;uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/&gt;
  &lt;uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/&gt;
  </code></pre>