Android: change width of overflow menu

问题:

Currently I have an overflow menu which has default width:

What I want is:

I have tried changing the theme this way:

<style name="MyWorkspaceDetailTheme" parent="@android:style/Theme.Holo.Light.DarkActionBar">          <item name="android:popupMenuStyle">@style/MyPopupMenu</item>  </style>  <style name="MyPopupMenu" parent="@android:style/Widget.Holo.ListPopupWindow">     <item name="android:dropDownWidth">30dp</item>   </style> 

but didn't got any success. Please can anyone help.

回答1:

I was follwing this[http://keepsafe.github.io/2014/11/19/building-a-custom-overflow-menu.html] tutorial but it did not mention way to change width

So i was also looking same answer and been searching for while, All the questions on Stackoverflow was unanswered. Finally i had to dig the developer.google.com to find out a way.

http://developer.android.com/reference/android/widget/ListPopupWindow.html

you will find a method setContentWidth(int width) which actually does our work.

Here is the answer

        //.......... Something on top         popupMenu.show();          // Try to force some horizontal offset         try {             Field fListPopup = menuHelper.getClass().getDeclaredField("mPopup");             fListPopup.setAccessible(true);             Object listPopup = fListPopup.get(menuHelper);             argTypes = new Class[] { int.class };             Class listPopupClass = listPopup.getClass();              // Get the width of the popup window             int width = (Integer) listPopupClass.getDeclaredMethod("getWidth").invoke(listPopup);              // Invoke setHorizontalOffset() with the negative width to move left by that distance             listPopupClass.getDeclaredMethod("setHorizontalOffset", argTypes).invoke(listPopup, -width);  /*********** THIS LINE DOSE OUR WORK and increases the width of OverFlow Menu ******/             listPopupClass.getDeclaredMethod("setContentWidth", argTypes).invoke(listPopup, width+200);              // Invoke show() to update the window's position             listPopupClass.getDeclaredMethod("show").invoke(listPopup);         } catch (Exception e) {             // Again, an exception here indicates a programming error rather than an exceptional condition             // at runtime             Log.w("Soemthing", "Unable to force offset", e);         } 

To this == >

文章来源: Android: change width of overflow menu