創建畫廊的形象，創建一個文件夾

Question

這個簡單的代碼讓用戶從庫

private void openGallery() { 
     Intent gallery = 
     new Intent(Intent.ACTION_PICK, 
     android.provider.MediaStore.Images.Media.INTERNAL_CONTENT_URI); 
     startActivityForResult(gallery, PICK_IMAGE); 
    } 

    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     super.onActivityResult(requestCode, resultCode, data); 
     if (resultCode == RESULT_OK && requestCode == PICK_IMAGE) { 
     Uri imageUri = data.getData(); 
     imageView.setImageURI(imageUri); 
     } 
    } 
} 

我的問題選擇一個圖像：我看到很多代碼或應用程序時將創建一個用戶上傳圖片的文件夾。我應該這樣做嗎？以及如何使用上述代碼創建文件夾

Answer 1

請檢查以下代碼以動態創建文件夾。

String root = Environment.getExternalStorageDirectory() 
        .toString(); 
      new File(root + "/" + Constants.IMAGE_DIRECTORY_NAME + "/" 
        + Constants.SUB_DIRECTORY_NAME).mkdirs(); 

請爲您選擇的圖庫圖像創建位圖文件並保存到您自己創建的文件夾中。

File outputfile = new File(root + "/" 
        + Constants.IMAGE_DIRECTORY_NAME + "/" 
        + Constants.SUB_DIRECTORY_NAME + "/", "img_" 
        + dateFormatter.format(new Date()).toString() + ".jpeg"); 

      OutputStream outStream = null; 
      try {     
       outStream = new FileOutputStream(outputfile); 
       bmFrame.compress(Bitmap.CompressFormat.JPEG, 70, outStream); 

      } catch (FileNotFoundException e) { 
       e.printStackTrace(); 
       Log.e(TAG, e.toString()); 

      } finally { 
       try { 
        if (outStream != null) { 
         outStream.flush(); 
         outStream.close(); 
         bmFrame.recycle(); 
        } 
       } catch (IOException e) { 
        e.printStackTrace(); 
       } 

      } 

     } 

使用上面的代碼在onActivityResult

@Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     super.onActivityResult(requestCode, resultCode, data); 
     if (resultCode == RESULT_OK && requestCode == PICK_IMAGE) { 
     Uri imageUri = data.getData(); 
     imageView.setImageURI(imageUri); 

     Bitmap bmFrame = MediaStore.Images.Media.getBitmap(
        this.getContentResolver(), imageUri); 

     //Add above code here. 
     } 
    }