682c24e228
This undoes the automerger skip which occured in
commit e740c84dc3 and
replays it as a standard (NOT -s ours) merge.
Change-Id: If5a47be26f73d6a0735c425cd66310a3e2a89086
77 lines
2.4 KiB
Plaintext
77 lines
2.4 KiB
Plaintext
page.title=Responding to UI Visibility Changes
|
|
|
|
trainingnavtop=true
|
|
|
|
@jd:body
|
|
|
|
<div id="tb-wrapper">
|
|
<div id="tb">
|
|
|
|
<!-- table of contents -->
|
|
<h2>This lesson teaches you to</h2>
|
|
<ol>
|
|
<li><a href="#listener">Register a Listener</a></li>
|
|
</ol>
|
|
|
|
|
|
<!-- other docs (NOT javadocs) -->
|
|
<h2>You should also read</h2>
|
|
|
|
<ul>
|
|
<li>
|
|
<a href="{@docRoot}training/appbar/index.html">Adding the App Bar</a>
|
|
</li>
|
|
<li>
|
|
<a href="{@docRoot}design/index.html">
|
|
Android Design Guide
|
|
</a>
|
|
</li>
|
|
</ul>
|
|
|
|
<h2>Try it out</h2>
|
|
|
|
<div class="download-box">
|
|
<a href="{@docRoot}samples/ImmersiveMode/index.html"
|
|
class="button">Get the sample</a>
|
|
<p class="filename">ImmersiveMode sample</p>
|
|
</div>
|
|
|
|
</div>
|
|
</div>
|
|
|
|
<p>This lesson describes how to register a listener so that your app can get notified
|
|
of system UI visibility changes. This is useful if you want to
|
|
synchronize other parts of your UI with the hiding/showing of system bars.</p>
|
|
|
|
<h2 id="listener">Register a Listener</h2>
|
|
|
|
<p>To get notified of system UI visibility changes, register an
|
|
{@link android.view.View.OnSystemUiVisibilityChangeListener} to your view.
|
|
This is typically the view you are using to control the navigation visibility.</p>
|
|
|
|
<p>For example, you could add this code to your activity's
|
|
{@link android.app.Activity#onCreate onCreate()} method:</p>
|
|
|
|
<pre>View decorView = getWindow().getDecorView();
|
|
decorView.setOnSystemUiVisibilityChangeListener
|
|
(new View.OnSystemUiVisibilityChangeListener() {
|
|
@Override
|
|
public void onSystemUiVisibilityChange(int visibility) {
|
|
// Note that system bars will only be "visible" if none of the
|
|
// LOW_PROFILE, HIDE_NAVIGATION, or FULLSCREEN flags are set.
|
|
if ((visibility & View.SYSTEM_UI_FLAG_FULLSCREEN) == 0) {
|
|
// TODO: The system bars are visible. Make any desired
|
|
// adjustments to your UI, such as showing the action bar or
|
|
// other navigational controls.
|
|
} else {
|
|
// TODO: The system bars are NOT visible. Make any desired
|
|
// adjustments to your UI, such as hiding the action bar or
|
|
// other navigational controls.
|
|
}
|
|
}
|
|
});</pre>
|
|
|
|
<p>It's generally good practice to keep your UI in sync with changes in system bar
|
|
visibility. For example, you could use this listener to hide and show the action bar in
|
|
concert with the status bar hiding and showing.</p>
|