android bindservice方法,Android bindservice方法返回false

大家好，又见面了，我是你们的朋友全栈君。

我想从另一个类(BaseExpandableListAdapter)的活动中调用一个方法。活动中的方法启动服务并调用bindService(,,)方法。但是，bindService方法总是返回false。我查了其他类似的帖子，但没有一个解决了我的问题。任何评论非常感谢。Android bindservice方法返回false

这里是BaseExpendableListAdapter类中，我调用该方法的活动：

class myExpandableListAdapter extends BaseExpandableListAdapter {

private Context _context;

private List _listDataHeader; // header titles

// child data in format of header title, child title

private HashMap _listDataChild;

private TextView myroutes_distance=null;

private TextView myroutes_time=null;

private TextView myroutes_speed=null;

public myExpandableListAdapter(Context context, List listDataHeader,

HashMap listChildData) {

this._context = context;

this._listDataHeader = listDataHeader;

this._listDataChild = listChildData;

}

@Override

public View getChildView(int groupPosition, final int childPosition,

boolean isLastChild, View convertView, final ViewGroup parent) {

MyActivity myactivity = new MyActivity();

myactivity.continue(_context.getApplicationContext()); // continue is the method that I’m calling which is within the activity

}

这里与方法继续活动：

public class MyActivity extends FragmentActivity implements

MyService.Callbacks{

boolean isBound = false;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

}

public void continue(Context ctx){

current_intent = new Intent(ctx.getApplicationContext(), MyService.class);

ctx.getApplicationContext().startService(current_intent); // This method works fine.

isBound = ctx.getApplicationContext().bindService(current_intent, mConnection, Context.BIND_AUTO_CREATE); // Here is where I have problem. isBound is always false.

}

public ServiceConnection mConnection = new ServiceConnection() {

@Override

public void onServiceConnected(ComponentName className,IBinder service) {

//

Myservice.LocalBinder binder = (MyService.LocalBinder) service;

myservice = binder.getServiceInstance(); //Get instance of your service!

myservice.registerClient(MyActivity.this); //Activity register in the service as client for callabcks!

}

}

public void setup(){

current_intent = new Intent(MyActivity.this, MyService.class);

startService(current_intent);

isBound = bindService(current_intent, mConnection, Context.BIND_AUTO_CREATE);

// both startService and bindService methods work fine here.

}

}

请注意，我用setup()方法中的类似命令，它工作得很好，但是当我在continue()方法中使用bindservice()方法时，绑定失败。

+0

你为什么在getChildView实例在MainActivity()？ –

+0

那么因为否则，我无法从其他活动中引用MyActivity中的继续方法。 –

+1

首先，您不应该从其他活动中调用该方法，而是在引用该活动的适配器中，它是’_context’。其次，你应该从不**自己实例化活动。 –

发布者：全栈程序员栈长，转载请注明出处：https://javaforall.cn/140606.html原文链接：https://javaforall.cn