Android圖像調整後的照相機意圖回調

Question

我的第一個問題在這裏！我遇到了一段代碼，該代碼用額外的輸出選項啓動攝像機意圖，然後在活動結果嘗試調整該圖像的大小。發生的事情是在回調中的resize函數中拋出一個空指針異常。

原始大圖仍然保存在文件系統上，因爲我可以從文件系統訪問它。

原始相機jpeg的尺寸是2560x1920，使用的手機是谷歌Nexus One。

我沒有清楚的想法，爲什麼調整大小不工作，任何人有任何見解？

下面是一些代碼：

的takePicture功能還創建虛擬文件：

 public boolean takePicture() { 

      Log.e(TAG, "takePicture interface function"); 
      String FileUri = Environment.getExternalStorageDirectory() + "/samples/"; 
      File file = new File(FileUri,"picture"+ pictureNumber +".jpg"); 
      try { 
       file.createNewFile(); 
       } catch (IOException e) { 
       e.printStackTrace(); 
       } 
       Uri outputFileUri = Uri.fromFile(file); 

      Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
      cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri); 
      startActivityForResult(cameraIntent, CAMERA_REQUEST); 
      Log.e(TAG, "intent started"); 
      return true; 
     } 

的對活動結果的回調函數：

protected void onActivityResult(int requestCode, int resultCode, Intent data) { 

     // handle the camera request returns and handle back button in camera. 

     if (requestCode == CAMERA_REQUEST && resultCode == RESULT_CANCELED) { 
      Toast toast = Toast.makeText(this,"Canceled, no picture taken.", 1000); 
      toast.show(); 
      return; 
      } 

     else if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) { 

      Log.e(TAG, "Camera intent return"); 

      Bitmap scaledphoto = null; 
      int height = 300; 
      int width = 300;  

      Bitmap photo = BitmapFactory.decodeFile(APP_DATA_PATH + "/samples/picture" + pictureNumber + ".jpg"); 
      Log.e(TAG, "Picture fetched"); 

      scaledphoto = Bitmap.createScaledBitmap(photo, height, width, true); 


      Log.e(TAG, "Picture scaled"); 

      saveImageToFile(scaledphoto, "picture" + pictureNumber + ".jpg"); 


      Log.e(TAG, "Scaled picture saved"); 

      myWebView.loadUrl("javascript:pictureTaken(\""+ pictureLoc + "\")"); 

      pictureNumber++; 

而這裏的logcat的：

06-21 14:59:13.496: E/AndroidRuntime(6130): FATAL EXCEPTION: main 
06-21 14:59:13.496: E/AndroidRuntime(6130): java.lang.RuntimeException: Failure  delivering result ResultInfo{who=null, request=1888, result=-1, data=null} to activity {test.test/test.test.CameraIntentTestActivity}: java.lang.NullPointerException 
06-21 14:59:13.496: E/AndroidRuntime(6130):  at android.app.ActivityThread.deliverResults(ActivityThread.java:2980) 
06-21 14:59:13.496: E/AndroidRuntime(6130):  at android.app.ActivityThread.handleSendResult(ActivityThread.java:3023) 
06-21 14:59:13.496: E/AndroidRuntime(6130):  at android.app.ActivityThread.access$1100(ActivityThread.java:123) 
06-21 14:59:13.496: E/AndroidRuntime(6130):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1177) 
06-21 14:59:13.496: E/AndroidRuntime(6130):  at android.os.Handler.dispatchMessage(Handler.java:99) 
06-21 14:59:13.496: E/AndroidRuntime(6130):  at android.os.Looper.loop(Looper.java:137) 
06-21 14:59:13.496: E/AndroidRuntime(6130):  at android.app.ActivityThread.main(ActivityThread.java:4424) 
06-21 14:59:13.496: E/AndroidRuntime(6130):  at java.lang.reflect.Method.invokeNative(Native Method) 
06-21 14:59:13.496: E/AndroidRuntime(6130):  at java.lang.reflect.Method.invoke(Method.java:511) 
06-21 14:59:13.496: E/AndroidRuntime(6130):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
06-21 14:59:13.496: E/AndroidRuntime(6130):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
06-21 14:59:13.496: E/AndroidRuntime(6130):  at dalvik.system.NativeStart.main(Native Method) 
06-21 14:59:13.496: E/AndroidRuntime(6130): Caused by: java.lang.NullPointerException 
06-21 14:59:13.496: E/AndroidRuntime(6130):  at android.graphics.Bitmap.createScaledBitmap(Bitmap.java:432) 

Answer 1

變化

Bitmap photo = BitmapFactory.decodeFile(APP_DATA_PATH + "/samples/picture" + pictureNumber + ".jpg"); 

要

Bitmap photo = (Bitmap) data.getExtras().get("data");