Fullscreen Activity in Android?

Question

How do I make an activity full screen? I mean without the notification bar. Any ideas?

Answer 1

There's a technique called Immersive Full-Screen Mode available in KitKat.

Example

Answer 2

Try this with appcompat from style.xml. It provides support for all platforms.

<!-- Application theme. -->
<style name="AppTheme.FullScreen" parent="AppTheme">
    <item name="android:windowFullscreen">true</item>
</style>


<!-- Application theme. -->
<style name="AppTheme" parent="@style/Theme.AppCompat.Light.NoActionBar" />

Answer 3

On Android 10, none worked for me.

But I that worked perfectly fine (1st line in oncreate):

    View decorView = getWindow().getDecorView();
    int uiOptions = View.SYSTEM_UI_FLAG_IMMERSIVE;
    decorView.setSystemUiVisibility(uiOptions);

    setContentView(....);

    if (getSupportActionBar() != null) {
        getSupportActionBar().hide();
    }

enjoy :)

Answer 4

If you don't want to use the theme @android:style/Theme.NoTitleBar.Fullscreen because you are already using a theme of you own, you can use android:windowFullscreen.

In AndroidManifest.xml:

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

In styles.xml:

<style name="MyTheme"  parent="your parent theme">
  <item name="android:windowNoTitle">true</item>
  <item name="android:windowFullscreen">true</item> 
</style>

Answer 5

Be careful with

requestWindowFeature(Window.FEATURE_NO_TITLE);

If you are using any method to set the action bar as the follow:

getSupportActionBar().setHomeButtonEnabled(true);

It will cause a null pointer exception.

Answer 6

https://developer.android.com/training/system-ui/immersive.html

Activity :

@Override
public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);
    if (hasFocus) {
        decorView.setSystemUiVisibility(
                View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_FULLSCREEN
                | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
    }
}

AndroidManifests:

 <activity android:name=".LoginActivity"
            android:configChanges="orientation|keyboardHidden|screenSize"
            android:label="@string/title_activity_login"
            android:theme="@style/FullscreenTheme"
            ></activity>