通常，从图库中选择一个视频并用库剪切，问题是我需要将剪切的视频（它存储在外部存储器：/storage/emulated/0/test_video.mp4中）转换为base64，这就是它失败的地方。我该怎么解决呢？我已经将权限放在清单上，并以编程方式请求这些权限。
//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();
}
而我在logcast中得到的只有：
我在github的一个帖子上找到了解决方案！只需要包括这一点：
//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
