Activity with transparent background

Question

what I want to achieve is activity with dialog-like transparency with 100% visibility of RelativeLayout content. This is activity's xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginBottom="50dip"
        android:layout_marginLeft="8dip"
        android:layout_marginRight="8dip"
        android:layout_marginTop="50dip">
        (...)
    </RelativeLayout>
</LinearLayout>

and this is manifest:

<activity
        android:name="com.acentic.rcontrol.activities.MyActivity"
        android:theme="@android:style/Theme.Translucent.NoTitleBar" >
</activity>

Right now background is still visible, what am I doing wrong?

--- EDIT: I added

android:background="#c0000000"

to LinearLayout. Now background is transparent as I wanted to, but also TextViews inside RelativeLayout are also transparent.. how to change it?

possible duplicate of [How to create Transparent Activity in Android?](http://stackoverflow.com/questions/2176922/how-to-create-transparent-activity-in-android) — , Jul 09 '13 at 07:50
Check code in link which works for me. http://stackoverflow.com/questions/2176922/how-to-create-transparent-activity-in-android/38589105#38589105 — Naeem Ibrahim, Jul 26 '16 at 11:50

score 12 · Answer 1 · answered Jul 09 '13 at 07:46

12

Try to set

    getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));

in your activity.

You can also try to do this in a style:

 <style name="AppTheme" parent="@android:style/Theme.Translucent.NoTitleBar">
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:colorBackgroundCacheHint">@null</item>
</style>

answered Jul 09 '13 at 07:46

sweggersen

2,342
1
22
27

1st approach doesn't work by my side, 2nd gives full background transparency + TextViews inside RelativeLayout are semitransparent, which is not eligible – Mariusz Jul 09 '13 at 07:52

score 7 · Answer 2 · answered Jul 09 '13 at 07:51

Create Style

<style name="MyTransparentTheme" parent="android:Theme.Dialog">
       <item name="android:windowIsTranslucent">true</item>
       <item name="android:windowBackground">@android:color/transparent</item>
       <item name="android:windowContentOverlay">@null</item>
       <item name="android:windowNoTitle">true</item>
       <item name="android:windowIsFloating">true</item>
       <item name="android:backgroundDimEnabled">false</item>

this is manifest:

<activity
            android:name="your package.activity"
            android:theme="@style/MyTransparentTheme">
        </activity>

Andy Res · Answer 3 · 2013-07-09T08:07:43.773

3

I added android:background="#c0000000" to LinearLayout. Now background is transparent as I wanted to, but also TextViews inside RelativeLayout are also transparent.. how to change it?

Add a solid background to your RelativeLayout element. This way the RelativeLayout will have a solid background, and only the margins will be transparent.

edited Jul 09 '13 at 08:07

answered Jul 09 '13 at 07:58

Andy Res

15,963
5
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score 1 · Answer 4 · answered Nov 20 '19 at 22:35

If your activity needs to extends from AppCompatActivity, you can create a custom style for your activity

<style name="transparentActivity" parent="Theme.AppCompat.NoActionBar">
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:colorBackgroundCacheHint">@null</item>
    <item name="android:windowIsTranslucent">true</item>
    <item name="android:windowAnimationStyle">@android:style/Animation</item>
    <item name="android:windowTranslucentStatus">true</item>
    <item name="android:statusBarColor">@android:color/transparent</item>
</style>

And then change the default style of your activity in the Manifest

<activity android:name=".MyActivity"
        android:theme="@style/transparentActivity"/>

Otherwise, if you do not need your activity to extend from AppCompatActivity, just change the theme of your activity in the manifest in this way.

<activity android:name=".MyActivity"
        android:theme="@android:style/Theme.Translucent.NoTitleBar"/>

score 0 · Accepted Answer · answered Jul 09 '13 at 07:50

0

After setting LinearLayout transparency try to set it's child transparency to the value that you want. This should make them have different transparency than LinearLayout. Try it.

answered Jul 09 '13 at 07:50

Marek

3,935
10
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70

Activity with transparent background

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