所以我设置了一个绑定服务,但每次我调用bindService()
它时都不会调用onBind()
我的服务的方法,onServiceConnected()
也不会被调用。我看不到任何错误,没有抛出任何东西。
private LoggingService mService;
private boolean mBound = false;
private boolean mLogging = false;
private ServiceConnection mConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName className, IBinder service){
LocalBinder binder = (LocalBinder) service;
mService = binder.getService();
mBound = true;
}
@Override
public void onServiceDisconnected(ComponentName arg0){
mBound = false;
}
};
...
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
if(!mBound){
Intent intent = new Intent(getActivity(), LoggingService.class);
getActivity().bindService(intent, mConnection, Context.BIND_AUTO_CREATE);
}
}
我在这上面放了断点。bindService()
肯定会被调用,但无论我等待多长时间onServiceConnected()
,我的服务中的任何内容都不会被调用。
所以当我到达这里时,它会抛出一个nullPointerException
logging.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(mLogging){
Toast toast = Toast.makeText(getActivity(),
"Service stopping", Toast.LENGTH_LONG);
toast.show();
mService.stopLogging();
mLogging = false;
} else {
Toast toast = Toast.makeText(getActivity(),
"Service Starting", Toast.LENGTH_LONG);
toast.show();
mService.startLogging("dude.jsn");
mLogging = true;
}
}
});
日志记录是一个Button
. 不知道我错过了什么。这是从片段中调用的,但这不重要吗?上下文仍然有效。
public class LoggingService extends Service {
public static final int LOG_INTERVAL = 500;
LocalBinder mBinder = new LocalBinder();
LoggingThread thread;
public class LocalBinder extends Binder {
LoggingService getService() {
return LoggingService.this;
}
}
...
@Override
public IBinder onBind(Intent intent) {
return mBinder;
}
}
任何指出我错过了什么的帮助都会很棒。