小编bug*_*ghi的帖子

我有这个简单的服务,广播用户的当前位置.我想使用绑定机制来控制服务生命周期,但服务只是没有启动.

我做错了什么？

public class GPSActivity extends ListActivity {
...
protected void onResume() {
        super.onResume();

        Log.i("Service", "Service bound");
        Intent intent = new Intent(this, LocationService.class);
        bindService(intent, service_connection , Context.BIND_AUTO_CREATE);
    }

protected void onPause() {
        if (dataUpdateReceiver!=null)
            unregisterReceiver(dataUpdateReceiver);
        unbindService(service_connection);
        super.onPause();
    }
class LocationServiceConnection implements ServiceConnection{
        public void onServiceConnected(ComponentName name, IBinder service) {
            Log.i("Service", "Service Connected");
        }
                public void onServiceDisconnected(ComponentName name) {

        }
    }
}

LocalBinder.java

public class LocalBinder<S> extends Binder {
    private String TAG = "LocalBinder";
    private  WeakReference<S> mService;


    public LocalBinder(S service){
        mService …

所以,我正在查看一些早期的代码,并发现这应该是一个语法错误的随机加号,但代码工作正常,我不明白为什么

tv_distance.setText("Distance: " + 
        ( dist >= 1000 ? (String.format("%.1f", dist/1000f)) : +dist )
        + " " + metric );

额外的加号位于三元运算符的第三个操作数:

() ? () : +dist

那我错过了什么？