如何在活动中创建一个窗口？

Question

I want to make a new window in an activity. like a popup window. I saw the source code of the Email application shipped with android OS and found this

import com.android.internal.policy.PolicyManager
Window w = PolicyManager.makeNewWindow(mContext);

But I can't find such a class in the SDK. Any idea?

Answer 1

android.widget.PopupWindow might be what you're after. http://developer.android.com/reference/android/widget/PopupWindow.html

Depending on what you're trying to do though, you may prefer using a dialog or an activity that isn't fullscreen.

Answer 2

Just a side note. PopupWindow doesn't work well with Preferences screens. AlertDialog is not themable.

Answer 3

You can use an AlertDialog or just use an Activity but with a dialog theme placing:

android:theme="@android:style/Theme.Dialog"

in your AndroidManifest file.