博客

优化点1（ 显示时机问题）

要求进入界面就在某个空间上显示一张用来引导用户的图片，项目中这里出现了两个问题

1.因为巧合，进入界面做了很多初始化动作之后再show，碰巧没有遇到这个问题

Caused by: android.view.WindowManager$BadTokenException: Unable to add window – token null is not valid; is your activity running?

2.进入界面初始化时间不定，比较长（因为有调用接口的缘故），导致用户时候时候总是可以看到popupwindow由无到有的过程

以上两个问题都是因为显示的时机不对造成的，解决方案如下：

//给控件添加布局监听，等待全部布局初始化完毕后再显示，并且记得反注册
imgReboot.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
     @Override
     public void onGlobalLayout() {
     //这里做展示的一些操作，为了防止popwindow重复创建多个重叠，在这里判断对象是否为null
    imgReboot.getViewTreeObserver().removeOnGlobalLayoutListener(this);//因为onGlobalLayout会进入多次，展示完毕将这个观察者回调反注册，提交代码效率，否则多次进入没有意义
     }
});

优化点2（window leaded）

在popupwindow没有关闭的情况下，关闭宿主，导致window leaked

窗体泄露日志如下

android.view.WindowLeaked: Activity com.spd.ehr.activity.main.MainActivity has leaked window android.widget.PopupWindow$PopupViewContainer{422e2bd8 V.E..... ......I. 0,0-216,162} that was originally added here
                               at android.view.ViewRootImpl.<init>(ViewRootImpl.java:368)
                               at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:252)
                               at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
                               at android.widget.PopupWindow.invokePopup(PopupWindow.java:1019)
                               at android.widget.PopupWindow.showAtLocation(PopupWindow.java:850)
                               at android.widget.PopupWindow.showAtLocation(PopupWindow.java:814)
                               at com.spd.ehr.activity.main.MainActivity.showGuidePopup(MainActivity.java:193)
                               at com.spd.ehr.activity.main.MainActivity.access$000(MainActivity.java:51)
                               at com.spd.ehr.activity.main.MainActivity$1.onGlobalLayout(MainActivity.java:156)
                               at android.view.ViewTreeObserver.dispatchOnGlobalLayout(ViewTreeObserver.java:815)
                               at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1828)
                               at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1046)
                               at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5663)
                               at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
                               at android.view.Choreographer.doCallbacks(Choreographer.java:574)
                               at android.view.Choreographer.doFrame(Choreographer.java:544)
                               at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
                               at android.os.Handler.handleCallback(Handler.java:733)
                               at android.os.Handler.dispatchMessage(Handler.java:95)
                               at android.os.Looper.loop(Looper.java:136)
                               at android.app.ActivityThread.main(ActivityThread.java:5052)
                               at java.lang.reflect.Method.invokeNative(Native Method)
                               at java.lang.reflect.Method.invoke(Method.java:515)
                               at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:796)
                               at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:612)
                               at dalvik.system.NativeStart.main(Native Method)

解决方案：如果窗口（popupwindow或者dialog）没有dismiss，在ondestory中先做dismiss