android - How to show an Activity as pop-up on other Activity? -

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I have an activity, and there is a button B in the view. If someone presses B. Then I want a pop-up that can make some parts of the screen invisible in that area, but the rest of the A is visible but not active. How can I get it?

If you want to use the activity instead of a dialog, then you can choose the theme of this activity to be < By setting the code on android: theme = "@ android: style / theme.Dialog" - in the manifest - this activity will look like a dialogue (below whatever was above)


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