play video from android internal storage

Question

I'm trying to play video files stored in android internal memory through intent. Files exist there but when i try to play them through intent, it give me the error "Media file not supported" or "can't play video" depending on device. I couldn't find where i'm wrong. here is my code

File mydir = activity.getDir("Videos", Context.MODE_PRIVATE);
File fileWithinMyDir = new File(mydir, filename);
String videoResource = fileWithinMyDir.getPath();
Uri intentUri = Uri.parse(videoResource);

Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setDataAndType(intentUri, "video/mp4");
startActivity(intent);

I don't know where i'm wrong and what should i do. any help would be much appreciated. Thank you :)

Answer 1

Thank you so much friends for participation, your efforts are very much appreciated. I'v found the solution of my problem. There is need to set file read true before playing it.

fileWithinMyDir.setReadable(true, false);

Now here is complete code of intent to play mp4 video from internal storage of android.

File mydir = activity.getDir("Videos", Context.MODE_PRIVATE);
File fileWithinMyDir = new File(mydir, headingsList.get(mPosition));
fileWithinMyDir.setReadable(true, false);
String videoResource = fileWithinMyDir.getPath();
Uri intentUri = Uri.fromFile(new File(videoResource));

Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setDataAndType(intentUri, "video/mp4");
startActivity(intent);