如何从图库中获取所选图像的路径 [英] How to get path of selected Image from gallery

问题描述

我正在创建一个应用程序以将图像上传到服务器. 选择图片时出现以下异常.

I am creating an app to upload image to server. I am getting following exception while selecting the image.

方法抛出"android.database.sqlite.SQLiteException"异常..

Method threw 'android.database.sqlite.SQLiteException' exception..

near "FROM": syntax error (code 1): , while compiling: SELECT  FROM images WHERE (_id=?)

打开图库的代码:

  Intent intent = new Intent(Intent.ACTION_PICK);
            intent.setType("image/*");
            startActivityForResult(intent, IMAGE_PICKER);

关于活动结果

  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 picturePath = cursor.getString(columnIndex);
        cursor.close();
        ImageView imageView = (ImageView) findViewById(R.id.imgView);
        imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));

推荐答案

使用ContentProvider选择任何图像时，得到的是该图像的URI.您需要将此URI转换为*Absolute Path*:

When you select any images using ContentProvider, you got is URI of that image. You need to convert this URI to *Absolute Path*:

您可以使用以下util将任何文件的URI转换为absolute path:

You can convert URI of any file to absolute path using below util:

public class RealPathUtil {

    @SuppressLint("NewApi")
    public static String getRealPathFromURI_API19(Context context, Uri uri){
        String filePath = "";
        String wholeID = DocumentsContract.getDocumentId(uri);

         // Split at colon, use second item in the array
         String id = wholeID.split(":")[1];

         String[] column = { MediaStore.Images.Media.DATA };     

         // where id is equal to             
         String sel = MediaStore.Images.Media._ID + "=?";

         Cursor cursor = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, 
                                   column, sel, new String[]{ id }, null);

         int columnIndex = cursor.getColumnIndex(column[0]);

         if (cursor.moveToFirst()) {
             filePath = cursor.getString(columnIndex);
         }   
         cursor.close();
         return filePath;
    }


    @SuppressLint("NewApi")
    public static String getRealPathFromURI_API11to18(Context context, Uri contentUri) {
          String[] proj = { MediaStore.Images.Media.DATA };
          String result = null;

          CursorLoader cursorLoader = new CursorLoader(
                  context, 
            contentUri, proj, null, null, null);        
          Cursor cursor = cursorLoader.loadInBackground();

          if(cursor != null){
           int column_index = 
             cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
           cursor.moveToFirst();
           result = cursor.getString(column_index);
          }
          return result;  
    }

    public static String getRealPathFromURI_BelowAPI11(Context context, Uri contentUri){
               String[] proj = { MediaStore.Images.Media.DATA };
               Cursor cursor = context.getContentResolver().query(contentUri, proj, null, null, null);
               int column_index
          = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
               cursor.moveToFirst();
               return cursor.getString(column_index);
    }
}

更多信息，请在此处 a>.

for more information, Please check tutorial here.

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