Can a videoview play a video stored on internal storage?

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MediaPlayer requires that the file being played has world-readable permissions. You can view the permissions of the file with the following command in adb shell:

ls -al /data/data/com.mypackage/myfile

You will probably see “-rw——“, which means that only the owner (your app, not MediaPlayer) has read/write permissions.

Note: Your phone must be rooted in order to use the ls command without specifying the file (in the internal memory).

If your phone is rooted, you can add world-read permissions in adb shell with the following command:

chmod o+r /data/data/com.mypackage/myfile

If you need to modify these permissions programmatically (requires rooted phone!), you can use the following command in your app code:

Runtime.getRuntime().exec("chmod o+r /data/data/com.mypackage/myfile");

Which is basically a linux command. See https://help.ubuntu.com/community/FilePermissions for more on chmod.

EDIT: Found another simple approach here (useful for those without rooted phones). Since the application owns the file, it can create a file descriptor and pass that to mediaPlayer.setDataSource():

FileInputStream fileInputStream = new FileInputStream("/data/data/com.mypackage/myfile");
mediaPlayer.setDataSource(fileInputStream.getFD());

This approach avoids the permission issue completely.

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