無法從部分Android手機上的圖片庫中上傳圖像和視頻

我是android開發新手。我正在處理圖庫中的圖像和視頻。我從圖庫上傳圖片或視頻。我得到遊標值返回null。無法從部分Android手機上的圖片庫中上傳圖像和視頻

首先

1）爲什麼出現問題時上傳圖片或視頻？

2）如何解決這個錯誤？

我用來上傳和gallery`圖像和視頻

OpenGallery.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       mode = "sms"; 
       gocodercamera.stopPreview(); 


       isCameraMenuVisible = false; 
       CameraMenu.setVisibility(View.GONE); 
       Intent galleryIntent = new Intent(/*Intent.ACTION_GET_CONTENT*/Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI); 
       galleryIntent.setType("image/* video/*"); 
       startActivityForResult(galleryIntent, 300); 
      } 
     }); 
`

OnActivityResult`

 /**Picking file from Gallery*/ 
     if (requestCode == 300) { 

      if (resultCode == RESULT_OK) { 

       try { 

        gocodercamera.setVisibility(View.VISIBLE); 
        gocodercamera.startPreview(); 
        if (data != null) { 

         Uri selectedImage = data.getData(); 

         String[] filePathColumn = {MediaStore.Images.Media.DATA}; 
         Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null); 
         cursor.moveToFirst(); 
         int columnIndex = cursor.getColumnIndex(filePathColumn[0]); 
         String filepath = cursor.getString(columnIndex); 
         cursor.close(); 


         if (filepath.endsWith(".jpg") || filepath.endsWith(".jpe") || filepath.endsWith(".jpeg") || filepath.endsWith(".png")) { 

          imagefilepath = filepath; 
//       uriList.add(imagefilepath); 
//       typesList.add("image"); 

          Uri getCompressedUriPath = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); 
          String getCompressedPath = compressImage(filepath, getCompressedUriPath); 
          if (aDetector.isConnectingToInternet()) { 
           sendMediaUpload(getCompressedPath, "image"); 
          } else { 
           Toast.makeText(getApplicationContext(), "Please check your internet connection", Toast.LENGTH_LONG).show(); 
          } 


//       ImageAdapterList myAdapter = new ImageAdapterList(); 
//       listview.setAdapter(myAdapter); 

         } else { 

          Cursor cursor1 = MediaStore.Video.query(getContentResolver(), selectedImage, new String[]{MediaStore.Video.VideoColumns.DURATION}); 
          cursor1.moveToFirst(); 
          String dur = cursor1.getString(cursor1.getColumnIndex("duration")); 
          int duration = Integer.parseInt(dur); 

          duration = duration/1000; 

          Log.e("dur", "dur : " + dur); 
          Log.e("duration", "duration : " + duration); 


          videofilepath = filepath; 
          imagefilepath = videofilepath; 
          sendMediaUpload(imagefilepath, "video"); 


//        ImageAdapterList myAdapter = new ImageAdapterList(); 
//        listview.setAdapter(myAdapter); 


         } 
        } else { 
//      Toast.makeText(getApplicationContext(),"Sorry! Failed to select File from gallery", Toast.LENGTH_SHORT).show(); 
        } 

       } catch (NullPointerException e) { 
        e.printStackTrace(); 
       } catch (Exception e) { 
        e.printStackTrace(); 
       } 
      } else if (resultCode == RESULT_CANCELED) { 

       gocodercamera.setVisibility(View.VISIBLE); 
       gocodercamera.startPreview(); 
//    Toast.makeText(getApplicationContext(),"User cancelled to select File", Toast.LENGTH_SHORT).show(); 
      } else { 

       gocodercamera.setVisibility(View.VISIBLE); 
       gocodercamera.startPreview(); 
//    Toast.makeText(getApplicationContext(),"Sorry! Failed to select File", Toast.LENGTH_SHORT).show(); 
      } 
     }`

來源

2017-06-13 Muthukumar Subramaniam