Dim the background of an activity in android

Question

I have a problem that I am showing an activity over another activity with transparent background but I want to show the same with dim background. How can I achieve this?

Answer 1

Here is the complete code:

    WindowManager.LayoutParams layoutParams = getWindow().getAttributes();
    layoutParams.dimAmount = 0.75f;
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);
    getWindow().setAttributes(layoutParams);

Put this code right after you inflate the layout.

Answer 2

Create a xml under drawable folder names as window_dim.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" >
<solid android:color="#000000" />
</shape>

Set main layout attribute in xml as bellow -

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/mainLayout"
...

android:foreground="@drawable/window_dim"
android:orientation="vertical"
... >

In activity set main layout as bellow -

mainLayout.getForeground().setAlpha(180);