java - 我无法从文件中获取 Uri

Question

我想要从文件路径获取 Uri。这是文件路径:

File path = new File(Environment.getExternalStorageDirectory().toString()+File.separator+"pic/picture.jpeg");

我尝试以这种方式检索 uri:

Uri uri = Uri.fromFile(path);

但我也尝试制作日志:Log.i("URI", "Uri dell' img "+ uri + ":");并且 uri 仍然是文件路径!不是例如:“content://...”而是“file://sdcard...”

我怎样才能得到正确的uri？谢谢

Answer 1

public File getFileFromContentUri(final Uri uri) 
{
    if (uri == null || !(uri.getScheme().equals("content") || uri.toString().contains("file://"))) return null;

    if (uri.getScheme().equals("content")) {
        final String[] columns = new String[] {MediaStore.MediaColumns.DATA};
        final Cursor cursor = getContentResolver().query(uri, columns, null, null, null);
        if (cursor == null || cursor.getCount() == 0) return null;
        cursor.moveToFirst();
        final String path = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA));
        if (path != null) return new File(path);
        else return null;
   }
   else if (uri.toString().contains("file://")) {
       return new File(uri.getPath());
   }

   return null;
}