開始活動在這種情況下無法正常工作？

Question

如果我們選擇第一個項目，它將保持在同一個活動中，但我們選擇除了第一個位置之外的其他項目，它將移動到下一個活動下一個活動

startActivity(mv);當我們單擊第一個位置的圖像

上，但土司被顯示爲圖像已被選中，但沒有移動到下一個activty

public boolean onTouch(View v, MotionEvent arg1) { 
     // TODO Auto-generated method stub 

case R.id.imageView2: 

      upLoadPhoto(); 

      break; 
protected void upLoadPhoto() { 

     Intent intent = new Intent(Intent.ACTION_GET_CONTENT, null); 
     intent.setType("image/*"); 
     intent.putExtra("return-data", true); 
     startActivityForResult(intent, 100); 

    } 


protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     // TODO Auto-generated method stub 
     super.onActivityResult(requestCode, resultCode, data); 


if (requestCode == 100 && data != null && data.getData() != null) { 
       System.out.println("in case"); 
       Uri _uri = data.getData(); 

       if (_uri != null) { 
        // User had pick an image. 
        Cursor cursor = getContentResolver() 
          .query(_uri, 
            new String[] { android.provider.MediaStore.Images.ImageColumns.DATA }, 
            null, null, null); 
        cursor.moveToFirst(); 
        // Link to the image 
        final String imageFilePath = cursor.getString(0); 
        Log.v("imageFilePath", imageFilePath); 
        File photos = new File(imageFilePath); 
        try { 
         gbmp = BitmapFactory.decodeStream(
           new FileInputStream(photos), null, null); 
        } catch (FileNotFoundException e) { 
         // TODO Auto-generated catch block 
         e.printStackTrace(); 
        } 
        cursor.close(); 

       } 
       mv = new Intent(Imageselection.this, Modeselection.class); 
       mv.putExtra("test", gbmp); 
       mv.putExtra("name", 100); 
       System.out.println("going to gamestart class"); 
       startActivity(mv); 
       Toast.makeText(getApplicationContext(), "Image selected", Toast.LENGTH_SHORT).show(); 
      } 

Answer 1

試試下面所示startactvity不調用碼。從GALLARY

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]); 
     filePath = cursor.getString(columnIndex); 
     cursor.close(); 

，並在下面意圖您onActivityResult方法寫入選擇圖像在NextActivity類onCreate方法寫去下一個活動

Intent picIntent = new Intent(CurrentActivity.this, 
         NextActivity.class); 
       picIntent.putExtra("gallery", filePath); 
       startActivity(picIntent); 

下面的代碼

ImageView imageView = (ImageView)findViewById(R.id.imgView); 

     String fileString = getIntent().getStringExtra("gallery"); 


     imageView.setImageBitmap(BitmapFactory.decodeFile(fileString)); 

Answer 2

其因爲你把整個圖像傳遞給了包。

這個包的大小有限制，你不能將圖像本身放到意圖中。

您需要將圖像保存到緩存，然後將圖像的文件名或文件路徑傳遞到putExtra，然後通過訪問文件名或文件路徑來檢索它。

對於您的情況，您從圖庫中選擇圖像，然後您可以獲取該圖像的URI或路徑，將URI /路徑添加到意圖中，然後在另一個活動中檢索它。

當您打算啓動圖庫時，將返回data，其中包含所選文件的Uri。

這裏R如果啓動默認的畫廊，您可能需要一些示例代碼：

// Launch Gallery to choose pic. 
Intent intentLaunchGallery = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); 

startActivityForResult(intentLaunchGallery, LOAD_IMAGE_ACTIVITY_REQUEST_CODE); 

... 

private String getPath(Uri uri) { 
    String[] projection = { MediaColumns.DATA }; 
    Cursor cursor = managedQuery(uri, projection, null, null, null); 
    int column_index = cursor.getColumnIndexOrThrow(MediaColumns.DATA); 
    cursor.moveToFirst(); 
    return cursor.getString(column_index); 
} 

... 

// Gallery launched to choose picture 
if (requestCode == LOAD_IMAGE_ACTIVITY_REQUEST_CODE) { 

     if (resultCode == RESULT_OK) { 

      fileUri = data.getData(); 
      filePath = getPath(fileUri); 
//    fileUri = Uri.parse(filePath); 

      // call media scanner to refresh gallery 
      MediaScannerConnection.scanFile(getApplicationContext(), new String[]{filePath}, null, new MediaScannerConnection.OnScanCompletedListener() { 

       @Override 
       public void onScanCompleted(String path, Uri uri) { 

        Log.i("MediaScanner", "Scanned " + path + ":"); 
        Log.i("MediaScanner", "-> uri=" + uri); 
       } 
      }); 

//    Toast.makeText(this, "Image chosen from: " + filePath, Toast.LENGTH_LONG).show(); 

      Log.d("MainMenu->onActivityResult", "Image chosen from: " + filePath); 

      // display the picture chosen by user 
      Intent intentShowMarkers = new Intent(MainMenuActivity.this, ShowMarkersActivity.class); 

      intentShowMarkers.putExtra("IMG", filePath); 
      intentShowMarkers.putExtra("FLAG", false); 

      MainMenuActivity.this.startActivity(intentShowMarkers); 

     } else if (resultCode == RESULT_CANCELED) { 

      // user pressed the cancel of gallery 
      Toast.makeText(MainMenuActivity.this, "Cancelled.", Toast.LENGTH_SHORT).show(); 

     } 
    }