Further to my previous email, I have sketched out how my Media Player
will work with the actual MediaPlayer object in a separate service,
MediaService. I can't work out how to make calls, and retrieve data from
the service. Following tutorials online has lead me to this:
MyApp.java - top level Activity, in onCreate():
...
MediaConnection conn = new MediaConnection();
StateApp state = (StateApp) getApplicationContext();
bindService( new Intent(this,MediaService.class), conn,
Context.BIND_AUTO_CREATE);
state.setMediaConnection(conn);
...
MediaView.java - View for playing media files, in play button onClick():
...
StateApp state = (StateApp) context.getApplicationContext();
MediaConnection conn = state.getMediaConnection();
conn.start(mediaLocation);
...
MediaConnection implements ServiceConnection:
public class MediaConnection implements ServiceConnection, MediaInterface{
private Binder service;
public void start(String loc){
MediaInterface i = (MediaInterface)service;
i.start(loc);
}
public void onServiceDisconnected(ComponentName cn){
Log.i("INFO", "Service unbound ");
}
public void onServiceConnected(ComponentName cn, IBinder b){
service = (Binder)b;
Log.i("INFO", "Service bound ");
}
}
Which throws a NullPointerException at i.start(loc). Can anyone tell me
what I'm doing wrong?
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