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Hiding the Status Bar

This lesson describes how to hide the status bar on different versions of Android. Hiding the status bar (and optionally, the navigation bar) lets the content use more of the display space, thereby providing a more immersive user experience.

Figure 1 shows an app with a visible status bar:

system bars

Figure 1. Visible status bar.

Figure 2 shows an app with a hidden status bar. Note that the action bar is hidden too. You should never show the action bar without the status bar.

system bars

Figure 2. Hidden status bar.

Hide the Status Bar on Android 4.0 and Lower

You can hide the status bar on Android 4.0 (API level 14) and lower by setting WindowManager flags. You can do this programmatically or by setting an activity theme in your app's manifest file. Setting an activity theme in your app's manifest file is the preferred approach if the status bar should always remain hidden in your app (though strictly speaking, you could programmatically override the theme if you wanted to). For example:

    android:theme="@android:style/Theme.Holo.NoActionBar.Fullscreen" >

The advantages of using an activity theme are as follows:

Alternatively, you can programmatically set WindowManager flags. This approach makes it easier to hide and show the status bar as the user interacts with your app:

public class MainActivity extends Activity {

    protected void onCreate(Bundle savedInstanceState) {
        // If the Android version is lower than Jellybean, use this call to hide
        // the status bar.
        if (Build.VERSION.SDK_INT < 16) {

When you set WindowManager flags (whether through an activity theme or programmatically), the flags remain in effect unless your app clears them.

You can use FLAG_LAYOUT_IN_SCREEN to set your activity layout to use the same screen area that's available when you've enabled FLAG_FULLSCREEN. This prevents your content from resizing when the status bar hides and shows.

Hide the Status Bar on Android 4.1 and Higher

You can hide the status bar on Android 4.1 (API level 16) and higher by using setSystemUiVisibility(). setSystemUiVisibility() sets UI flags at the individual view level; these settings are aggregated to the window level. Using setSystemUiVisibility() to set UI flags gives you more granular control over the system bars than using WindowManager flags. This snippet hides the status bar:

View decorView = getWindow().getDecorView();
// Hide the status bar.
// Remember that you should never show the action bar if the
// status bar is hidden, so hide that too if necessary.
ActionBar actionBar = getActionBar();

Note the following:

Make Content Appear Behind the Status Bar

On Android 4.1 and higher, you can set your application's content to appear behind the status bar, so that the content doesn't resize as the status bar hides and shows. To do this, use SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN. You may also need to use SYSTEM_UI_FLAG_LAYOUT_STABLE to help your app maintain a stable layout.

When you use this approach, it becomes your responsibility to ensure that critical parts of your app's UI (for example, the built-in controls in a Maps application) don't end up getting covered by system bars. This could make your app unusable. In most cases you can handle this by adding the android:fitsSystemWindows attribute to your XML layout file, set to true. This adjusts the padding of the parent ViewGroup to leave space for the system windows. This is sufficient for most applications.

In some cases, however, you may need to modify the default padding to get the desired layout for your app. To directly manipulate how your content lays out relative to the system bars (which occupy a space known as the window's "content insets"), override fitSystemWindows(Rect insets). The fitSystemWindows() method is called by the view hierarchy when the content insets for a window have changed, to allow the window to adjust its content accordingly. By overriding this method you can handle the insets (and hence your app's layout) however you want.

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