无法添加窗口-令牌null无效；您的活动正在进行吗? [英] Unable to add window -- token null is not valid; is your activity running?

问题描述

我想在用户单击浮动图标时显示自定义弹出菜单

i want to show a custom popup menu when user click on a floating icon

使用服务创建的浮动图标，但我没有任何活动

the float icon create with an service and i have no activity

这是我的浮动图标代码

public class copy_actions_service extends Service
{
    ImageView copy_ImageView;
    WindowManager windowManager;
    WindowManager.LayoutParams layoutParams;

    @Override
    public IBinder onBind(Intent arg0)
    {
        // TODO Auto-generated method stub
        return null;
    }

    @Override

    public void onCreate()
    {
        windowManager=(WindowManager)getSystemService(WINDOW_SERVICE);

        copy_ImageView=new ImageView(this);
        copy_ImageView.setImageResource(R.drawable.ic_launcher);
        copy_ImageView.setAlpha(245);
        copy_ImageView.setOnClickListener(new OnClickListener()
        {

            @Override
            public void onClick(View arg0)
            {
                showCustomPopupMenu();
            }
        });

        layoutParams=new WindowManager.LayoutParams(
                WindowManager.LayoutParams.WRAP_CONTENT,
                WindowManager.LayoutParams.WRAP_CONTENT,
                WindowManager.LayoutParams.TYPE_PHONE,
                WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
                PixelFormat.TRANSLUCENT);

        layoutParams.gravity=Gravity.TOP|Gravity.CENTER;
        layoutParams.x=0;
        layoutParams.y=100;

        windowManager.addView(copy_ImageView, layoutParams);

    }

    private void showCustomPopupMenu()
    {
        LayoutInflater layoutInflater=(LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View view=layoutInflater.inflate(R.layout.xxact_copy_popupmenu, null);

        PopupWindow popupWindow=new PopupWindow();
        popupWindow.setContentView(view);
        popupWindow.setWidth(LinearLayout.LayoutParams.WRAP_CONTENT);
        popupWindow.setHeight(LinearLayout.LayoutParams.WRAP_CONTENT);
        popupWindow.setFocusable(true);

        popupWindow.showAtLocation(view, Gravity.NO_GRAVITY, 0, 0);             
    }
}

一切都很好，但是当我单击浮动按钮应用程序停止并在logcat上显示此错误时:(

every thing fine but when i click on float button app stop and this error is shown on logcat :(

11-23 02:18:58.217: E/AndroidRuntime(3231): android.view.WindowManager$BadTokenException: Unable to add window -- token null is not valid; is your activity running?

但是我没有活动?！

我想在用户单击浮动图标后弹出菜单显示；但是弹出菜单只能显示文本；

i want to popup menu show after user click on float icon; but popup menu only can show text;

我如何显示带有图标的弹出菜单?

how to i can show a popup menu with icons?

推荐答案

我遇到了与您相同的问题，看来您使用的是 http://www.piwai.info/chatheads-basics 就像我一样.问题在于您无法可靠地将当前活动传递到弹出窗口，因为您无法控制当前活动.似乎有一种不可靠的方式来获取当前活动，但我不建议这样做.

I had the same problem as you, it looks like you used the tutorial from http://www.piwai.info/chatheads-basics like I did. The problem is that you cannot reliably pass the current activity to the popup window, because you have no control over the current activity. It looks like there might be a unreliable way to get the current activity, but I don't recommend that.

我为应用程序修复该问题的方法是不使用弹出窗口，而是通过窗口管理器自行创建.

The way I fixed it for my app was to not use the popup window, but instead make my own through the window manager.

private void showCustomPopupMenu()
    {
                windowManager2 = (WindowManager)getSystemService(WINDOW_SERVICE);
                LayoutInflater layoutInflater=(LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                View view=layoutInflater.inflate(R.layout.xxact_copy_popupmenu, null);
                params=new WindowManager.LayoutParams(
                        WindowManager.LayoutParams.WRAP_CONTENT,
                        WindowManager.LayoutParams.WRAP_CONTENT,
                        WindowManager.LayoutParams.TYPE_PHONE,
                        WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
                        PixelFormat.TRANSLUCENT);

                params.gravity=Gravity.CENTER|Gravity.CENTER;
                params.x=0;
                params.y=0;
                windowManager2.addView(view, params);  
    }

如果您希望它看起来像一个弹出窗口，只需添加一个透明的灰色视图作为背景，并向其添加一个onClickListener即可从windowManager对象中删除该视图.

If you want this to look like a popup window, just add a transparent gray view as the background and add a onClickListener to it to remove the view from the windowManager object.

我知道这不如弹出窗口方便，但根据我的经验，这是最可靠的方法.

I know this isn't as convenient as a popup, but from my experience, it is the most reliable way.

别忘了在清单文件中添加权限

and don't forget to add permission in your manifest file

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

这篇关于无法添加窗口-令牌null无效；您的活动正在进行吗?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！