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android – Error creating MediaPlayer with Uri or file in assets

Posted by: admin May 14, 2020 Leave a comment

Questions:

I copied song.mp3 to my project’s assets directory and wrote this code:

private MediaPlayer mp;

Uri uri = Uri.parse("file:///android_asset/song.mp3");

mp=MediaPlayer.create(this, uri);

After running the create statement, the variable mp is null. What is wrong?

Thanks.

How to&Answers:

Try this and see if any exceptions are caught:

try {
    MediaPlayer mp = new MediaPlayer();
    mp.setDataSource(this, uri);
}
catch (NullReferenceArgument e) {
    Log.d(TAG, "NullReferenceException: " + e.getMessage());
}
catch (IllegalStateException e) {
    Log.d(TAG, "IllegalStateException: " + e.getMessage());
}
catch (IOException e) {
    Log.d(TAG, "IOException: " + e.getMessage());
}
catch (IllegalArgumentException e) {
    Log.d(TAG, "IllegalArgumentException: " + e.getMessage());
}
catch (SecurityException e) {
    Log.d(TAG, "SecurityException: " + e.getMessage());
}

The exception caught will explain what is going wrong in your create. According the the docs, the static create method is just shorthand for what is in the try block above. The major difference that I can see is that the static method create doesn’t throw while setDataSource does.

Answer:

Try this:

try {
    AssetFileDescriptor afd = getAssets().openFd("AudioFile.mp3");
    player = new MediaPlayer();
    player.setDataSource(afd.getFileDescriptor(),afd.getStartOffset(),afd.getLength());
    player.prepare();
    player.start();
    } 
catch (IllegalArgumentException e) {    } 
catch (IllegalStateException e) { } 
catch (IOException e) { }