java.io.FileNotFoundException：无内容提供者：/storage/emulated/0/test_video.mp4

Question

通常从图库中选择视频并使用库剪切，问题是我需要将该剪切视频（它存储在外部存储器中：/storage/emulated/0/test_video.mp4）转换为base64 这就是它失败的地方。我该如何解决？ 我已经将权限放在清单上并以编程方式请求它们。

//Getting video from previous activity
        Uri selectedVideo = Uri.parse(intent.getStringExtra("trimmedVideo"));
        Log.d(Global.getTag(), "path: "+selectedVideo.toString());

 //Converting Selected video to base64
        try {
            InputStream in = getContentResolver().openInputStream(selectedVideo);  <---This line fails
            byte[] bytes = Global.getBytes(in);
            Log.d(Global.getTag(), "bytes size= "+bytes.length);
            video_base64 = Base64.encodeToString(bytes,Base64.DEFAULT);
            Log.d(Global.getTag(), "Base64string= "+ video_base64);
        } catch (Exception e) {
            e.printStackTrace();
        }

我在 logcast 中得到的只是：

Answer 1

我在 github post 上找到了解决方案！只需要包括这个：

//Getting video from previous activity
Uri selectedVideo = Uri.parse(intent.getStringExtra("trimmedVideo"));

Uri selectedVideoFinal = null;
        if (selectedVideo.getScheme() == null){
            selectedVideoFinal = Uri.fromFile(new File(selectedVideo.getPath()));
        }else{
            selectedVideoFinal = selectedVideo;
        }


 Log.d(Global.getTag(), "path: "+selectedVideoFinal);

 MediaMetadataRetriever mMMR = new MediaMetadataRetriever(); ...continue code