Android - 服务，MediaPlayer和setVolume

Question

I have a service with MediaPlayer in it. From Activity I need to change Player's volume. Any ideas? PS I very need your help PPS Sorry for my English, please

Answer 1

This might help you..

protected static void setVolume(int volume) {
        currentVolume = volume;
        {
            if (volume == 1) {
                volume = 2;
            }
            try {
                float vol = ((float) volume / CONSTANT.SYSTEM_MAX_VOLUME);
                mediaPlayer.setVolume(vol, vol);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

    }

Also refer this

Answer 2

If it is a local Service and you have not forced it to run into another thread, you can define a method to set the MediaPlayer 's volume, bind to the Service from the Activity , and call the method directly. See the "Local Service Sample" here to see how to bind to a Service . Once you have bound to the Service , you can cast the IBinder you receive to an instance of your Service class to use its methods.

If it is not a local Service or if you have made it run in a separate thread, you will need to communicate with the Service via a Messenger / Handler or using an Intent . There is a "Remote Messenger Service Sample" in the same link from before.