Android中本地图片地址和Uri的相互装换

缺乏、安全感 2022-05-23 02:57 255阅读 0赞

//绝对路径转uri
        private static Uri getImageContentUri(Context context, java.io.File imageFile) {
            String filePath = imageFile.getAbsolutePath();
            Cursor cursor = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                    new String[]{MediaStore.Images.Media._ID}, MediaStore.Images.Media.DATA + "=? ",
                    new String[]{filePath}, null);
            if (cursor != null && cursor.moveToFirst()) {
                int id = cursor.getInt(cursor.getColumnIndex(MediaStore.MediaColumns._ID));
                Uri baseUri = Uri.parse("content://media/external/images/media");
                return Uri.withAppendedPath(baseUri, "" + id);
            } else {
                if (imageFile.exists()) {
                    ContentValues values = new ContentValues();
                    values.put(MediaStore.Images.Media.DATA, filePath);
                    return context.getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
                } else {
                    return null;
                }
            }
        }

// uri转绝对路径 
        public static String getFilePathFromContentUri(Uri selectedVideoUri, ContentResolver contentResolver) {  
            String filePath;  
            String[] filePathColumn = {MediaStore.MediaColumns.DATA};  
      
            Cursor cursor = contentResolver.query(selectedVideoUri, filePathColumn, null, null, null);  
    //      也可用下面的方法拿到cursor  
    //      Cursor cursor = this.context.managedQuery(selectedVideoUri, filePathColumn, null, null, null);  
      
            cursor.moveToFirst();  
      
            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);  
            filePath = cursor.getString(columnIndex);  
            cursor.close();  
            return filePath;  
        }