android 2活动在同一屏幕上

Question

I've a tabBar with 4 tabs, the Main tab is the first one, and when I click the second one I want do display another activity above the main activity in the half of the screen, reducing the opacity of the main. I'm doing this with a Dialog but it's not the result I want. What are the best way to do this?

example image

Answer 1

看一下Fragments ，这似乎是使用它们的最佳时机。

Answer 2

There are only 3 options to achieve what you want.

• Second activity can be dialog (You already said you do it but you don't like).
• Using fragments . (recommended)
• Using layouts by playing with visibility, (not recommended in your case)

A Fragment represents a behavior or a portion of user interface in an Activity. You can combine multiple fragments in a single activity to build a multi-pane UI and reuse a fragment in multiple activities