How to Create a Transparent Activity in Android?

05 May, 2021
Many times we have to display a feature in our app where we have to use transparent activity inside our android app. In this article, we will take a look at creating a Transparent Activity in Android. 
We will be building a simple application in which we will be displaying a simple TextView inside a transparent activity. For creating a transparent activity we will be adding a different style to our activity. A sample video is given below to get an idea about what we are going to do in this article. Note that we are going to implement this project using the Java language. 
Step 1: Create a New Project
To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. Note that select Java as the programming language.
Step 2: Working with the activity_main.xml file
Navigate to the app > res > layout > activity_main.xml and add the below code to that file. Below is the code for the activity_main.xml file. 
XML
<?xml version="1.0" encoding="utf-8"?><androidx.constraintlayout.widget.ConstraintLayout     xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context=".MainActivity">      <!--text view for displaying textview-->    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_margin="4dp"        android:padding="10dp"        android:text="Welcome to Geeks for Geeks"        android:textAlignment="center"        android:textColor="@color/purple_200"        android:textSize="25sp"        android:textStyle="bold"        app:layout_constraintBottom_toBottomOf="parent"        app:layout_constraintLeft_toLeftOf="parent"        app:layout_constraintRight_toRightOf="parent"        app:layout_constraintTop_toTopOf="parent" />  </androidx.constraintlayout.widget.ConstraintLayout>
Step 3: Adding a custom style for this activity 
Navigate to the app > res > values > themes.xml and add the below code to it. 
XML
<resources xmlns:tools="http://schemas.android.com/tools">    <!-- Base application theme. -->    <style name="Theme.TransparentActivity" parent="Theme.MaterialComponents.DayNight.DarkActionBar">        <!-- Primary brand color. -->        <item name="colorPrimary">@color/purple_500</item>        <item name="colorPrimaryVariant">@color/purple_700</item>        <item name="colorOnPrimary">@color/white</item>        <!-- Secondary brand color. -->        <item name="colorSecondary">@color/teal_200</item>        <item name="colorSecondaryVariant">@color/teal_700</item>        <item name="colorOnSecondary">@color/black</item>        <!-- Status bar color. -->        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>        <!-- Customize your theme here. -->    </style>      <!--add below code in themes.xml file-->    <!--below is the style for transparent activity and here we are using no action bar.-->    <style name="Theme.AppCompat.Translucent" parent="Theme.AppCompat.NoActionBar">        <!--on below line we are setting background as transparent color-->        <item name="android:background">@android:color/transparent</item>        <!--on below line we are displaying the windowNotitle as true as we are not displaying our status bar-->        <item name="android:windowNoTitle">true</item>        <!--on below line we are setting our window background as transparent color-->        <item name="android:windowBackground">@android:color/transparent</item>        <!--on below line we are setting color background cache hint as null-->        <item name="android:colorBackgroundCacheHint">@null</item>        <!--on below line we are adding a window translucent as true-->        <item name="android:windowIsTranslucent">true</item>        <!--on below line we are adding a window animationstyle-->        <item name="android:windowAnimationStyle">@android:style/Animation</item>    </style>  </resources>
Step 4: Changing the theme in the AndroidManifest.xml file 
Navigate to the app > AndroidManifest.xml inside application tag in theme tag add this style in it. 
XML
android:theme="@style/Theme.AppCompat.Translucent"
Now run your app and see the output of the app. 
Output:
Android
Java
Java
Android
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