How to make a linearLayout partially transparent in android?

Question

I have a RelativeLayout containing 2 LinearLayouts one of them is partially covering the other. I want to make the part of the LinearLayout

Answer 1

Add the theme to the activity which needs to be transparent in your Manifest file.

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

Answer 2

When we set the color it is like ARGB(Alpha Red Green Blue). You need to change the alpha in the color code to increase or decrease the amount of Transparency :

You can range it from 00 to FF (Hexa Decimal)

For maximum transparency => #00555555 (Here 00 stands for the alpha)

For minimum or no transparency => #FF555555 (Here FF stands for the alpha)

So, for setting the transparency of an ImageView you can code like this:

ImageView image = (ImageView) findViewById(R.id.myImage);
image.setAlpha(0.3);

Also, you can set the alpha for your LinearLayout like this :

LinearLayout ll = (LinearLayout) findViewById(R.id.linearlayout);
ll.setAlpha(0.4);

Answer 3

Use this in your Layout

android:alpha="0.5"

0.0 is totally transparent, 1.0 is fully opaque.

Answer 4

set the background color like this:

android:background="#00ffffff"

Answer 5

It is so late but it will be helpful for others....

create xml file like this...

  <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" 
    >

    <LinearLayout
        android:id="@+id/l1"
        android:layout_width="190dp"
        android:layout_height="match_parent"
        android:background="#234234"
        android:orientation="vertical" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="onClickNext"
        android:text="Next >" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/l2"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:alpha=".05"
        android:orientation="vertical" >
        </LinearLayout>

</LinearLayout>

now go to your manifest... and add this line...

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

enjoyyyy...

Answer 6

Make your LinearLayout Background Transparent :

android:background="@android:color/transparent"

and for making your Layout Partially Transparent maybe this Link Helps you : How to create View partially invisible

Edit: if you have an Image as Background of your layout so i think you can set alpha for your LinearLayout and control it from code without changing your background, to Transparent your Layout with Background Image :

android:alpha=""

alpha property of the view, as a value between 0 (completely 
transparent) and 1 (completely opaque)