我需要启动一个弹出窗口，从服务做具体的我的应用程序中的东西。我似乎还没有找到一个很好的办法做到这一点。里面的onCreate（）创建的弹出窗口，但是当我启动它showAtLocation我得到这个错误：

  10-06 13：39：49.573：ERROR / AndroidRuntime（5966）：android.view.WindowManager $ BadTokenException：产生的原因无法添加窗口 - 标记空是无效的;在您的活动运行？
 

有人可以帮忙吗？谢谢你，

-em

我有同样的问题，在这里，如果我是如何解决它。 在我第一次尝试使用Android的原生 PopupWindow 类，但后来我决定使用窗口管理器这样的方式

 公共类的MyService延伸服务{

私人查看MView的;

私人WindowManager.LayoutParams mParams;
私人窗口管理mWindowManager;

@覆盖
公共无效的onCreate（）{
    super.onCreate（）;

    MVIEW =新MyLoadView（本）;

    mParams =新WindowManager.LayoutParams（
            WindowManager.LayoutParams.MATCH_PARENT，150，10，10，
            WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY，
            WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
            WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL，
            PixelFormat.TRANSLUCENT）;

    mParams.gravity = Gravity.CENTER;
    mParams.setTitle（窗口测试）;

    mWindowManager =（窗口管理器）getSystemService（WINDOW_SERVICE）;
    mWindowManager.addView（MVIEW，mParams）;

}

@覆盖
公众的IBinder onBind（意向意图）{
    返回null;
}

@覆盖
公共无效的onDestroy（）{
    super.onDestroy（）;
    （（窗口管理器）getSystemService（WINDOW_SERVICE））removeView（MVIEW）。
    MVIEW = NULL;
}

公共类MyLoadView扩展视图{

    私人油漆mPaint;

    公共MyLoadView（上下文的背景下）{
        超（上下文）;
        mPaint =新的油漆（）;
        mPaint.setTextSize（50）;
        mPaint.setARGB（200，200，200，200）;
    }

    @覆盖
    保护无效的OnDraw（帆布油画）{
        super.onDraw（画布）;
        canvas.drawText（测试测试测试，0，100，mPaint）;
    }

    @覆盖
    保护无效onAttachedToWindow（）{
        super.onAttachedToWindow（）;
    }

    @覆盖
    保护无效onDetachedFromWindow（）{
        super.onDetachedFromWindow（）;
    }

    @覆盖
    保护无效onMeasure（INT widthMeasureSpec，诠释heightMeasureSpec）{
        super.onMeasure（widthMeasureSpec，heightMeasureSpec）;
    }
}
}
 

和您可以通过意向调用这个服务类：

 意图=新的意图（mContext，MyService.class）;
如果（意向！= NULL）{
     。的getContext（）startService（意向）;
}
 

此外，在您的清单文件设置权限：

 ＆LT;使用-权限的Andr​​oid：名称=android.permission.SYSTEM_ALERT_WINDOW/＆GT;
 

我引用Android的 LoadAverageService.java 类，我终于从服务创建的弹出窗口！这是一个非常简单的例子，所以你可能需要添加更多的东西，如果你想开发复杂的功能。希望这会帮助你和其他人。

I need to launch a popup window from a service to do something specific inside my application. I do not seem to find a good way to do it. Inside onCreate() I create the popup window but when I launch it with showAtLocation I get this error:

10-06 13:39:49.573: ERROR/AndroidRuntime(5966): Caused by: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not valid; is your activity running?

Can someone please help? Thanks,

-em

I had the same problem and here if how i solved it. At first time i've tried to use Android's native PopupWindow class, but later i decided to use WindowManager like this way :

public class MyService extends Service {

private View mView;

private WindowManager.LayoutParams mParams;
private WindowManager mWindowManager;

@Override
public void onCreate() {
    super.onCreate();

    mView = new MyLoadView(this);

    mParams = new WindowManager.LayoutParams(
            WindowManager.LayoutParams.MATCH_PARENT, 150, 10, 10,
            WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
            WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
            WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL,
            PixelFormat.TRANSLUCENT);

    mParams.gravity = Gravity.CENTER;
    mParams.setTitle("Window test");

    mWindowManager = (WindowManager)getSystemService(WINDOW_SERVICE);
    mWindowManager.addView(mView, mParams);

}

@Override
public IBinder onBind(Intent intent) {
    return null;
}

@Override
public void onDestroy() {
    super.onDestroy();
    ((WindowManager)getSystemService(WINDOW_SERVICE)).removeView(mView);
    mView = null;
}

public class MyLoadView extends View {

    private Paint mPaint;

    public MyLoadView(Context context) {
        super(context);
        mPaint = new Paint();
        mPaint.setTextSize(50);
        mPaint.setARGB(200, 200, 200, 200);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        canvas.drawText("test test test", 0, 100, mPaint);
    }

    @Override
    protected void onAttachedToWindow() {
        super.onAttachedToWindow();
    }

    @Override
    protected void onDetachedFromWindow() {
        super.onDetachedFromWindow();
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }
}
}

And you can call this service class via intent :

intent = new Intent(mContext, MyService.class);
if (intent != null) {
     getContext().startService(intent);
}

Also, set permission in your manifest file :

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

I referenced Android's LoadAverageService.java class, and i finally created a popup window from service! This is a very simple example, so you might need to add something more if you want to develop complex functions. Hope this will help you and others.