我如何使一个活动全屏?没有通知栏。
当前回答
这些答案大部分似乎都过时了。Developer.android.com建议这样做:
科特林：
private fun hideSystemBars() {
val windowInsetsController = ViewCompat.getWindowInsetsController(window.decorView) ?: return
windowInsetsController.systemBarsBehavior = WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
windowInsetsController.hide(WindowInsetsCompat.Type.systemBars())
}
Java:
private void hideSystemBars() {
WindowInsetsControllerCompat windowInsetsController = ViewCompat.getWindowInsetsController(getWindow().getDecorView());
if (windowInsetsController == null) {
return;
}
windowInsetsController.setSystemBarsBehavior(WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE);
windowInsetsController.hide(WindowInsetsCompat.Type.systemBars());
}
更多信息:https://developer.android.com/training/system-ui/immersive
其他回答
在AndroidManifest.xml文件:
<activity
android:name=".Launch"
android:label="@string/app_name"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen" > <!-- This line is important -->
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
或者在Java代码中:
protected void onCreate(Bundle savedInstanceState){
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
}
奇巧有一种叫做沉浸式全屏模式的技术。
例子
import androidx.core.view.WindowInsetsCompat.Type
fun Activity.fullscreen() {
with(WindowInsetsControllerCompat(window, window.decorView)) {
systemBarsBehavior = WindowInsetsControllerCompat.BEHAVIOR_SHOW_BARS_BY_SWIPE
hide(Type.systemBars())
}
}
fun Activity.exitFullscreen() {
WindowInsetsControllerCompat(window, window.decorView).show(Type.systemBars())
}
这些答案大部分似乎都过时了。Developer.android.com建议这样做:
科特林：
private fun hideSystemBars() {
val windowInsetsController = ViewCompat.getWindowInsetsController(window.decorView) ?: return
windowInsetsController.systemBarsBehavior = WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
windowInsetsController.hide(WindowInsetsCompat.Type.systemBars())
}
Java:
private void hideSystemBars() {
WindowInsetsControllerCompat windowInsetsController = ViewCompat.getWindowInsetsController(getWindow().getDecorView());
if (windowInsetsController == null) {
return;
}
windowInsetsController.setSystemBarsBehavior(WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE);
windowInsetsController.hide(WindowInsetsCompat.Type.systemBars());
}
更多信息:https://developer.android.com/training/system-ui/immersive
在经历了很长时间的失败后，我想出了自己的解决方案，这与其他开发者的做法非常相似。所以如果有人需要她的话。我的问题是，系统导航栏没有隐藏后调用。在我的例子中，我需要横屏，所以为了以防万一，注释那一行。 首先，创建风格
<style name="FullscreenTheme" parent="AppTheme">
<item name="android:actionBarStyle">@style/FullscreenActionBarStyle</item>
<item name="android:windowActionBarOverlay">true</item>
<item name="android:windowBackground">@null</item>
<item name="metaButtonBarStyle">?android:attr/buttonBarStyle</item>
<item name="metaButtonBarButtonStyle">?android:attr/buttonBarButtonStyle</item>
</style>
这是我的舱单
<activity
android:name=".Splash"
android:screenOrientation="landscape"
android:configChanges="orientation|keyboard|keyboardHidden|screenLayout|screenSize"
android:label="@string/app_name"
android:theme="@style/SplashTheme">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".MainActivity"
android:configChanges="orientation|keyboard|keyboardHidden|screenLayout|screenSize"
android:screenOrientation="landscape"
android:label="@string/app_name"
android:theme="@style/FullscreenTheme">
</activity>
这是我的spalsh活动
public class Splash extends Activity {
/** Duration of wait **/
private final int SPLASH_DISPLAY_LENGTH = 2000;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.splash_creen);
/* New Handler to start the Menu-Activity
* and close this Splash-Screen after some seconds.*/
new Handler().postDelayed(new Runnable(){
@Override
public void run() {
/* Create an Intent that will start the Menu-Activity. */
Intent mainIntent = new Intent(Splash.this,MainActivity.class);
Splash.this.startActivity(mainIntent);
Splash.this.finish();
}
}, SPLASH_DISPLAY_LENGTH);
}
}
这是我主要的全屏活动。onSystemUiVisibilityChange这个方法是退出重要的，否则android主导航栏在调用后将保持不变，不再消失。很烦人的问题，但是这个函数解决了这个问题。
公共类MainActivity扩展了AppCompatActivity ｛
private View mContentView;
@Override
public void onResume(){
super.onResume();
mContentView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE
| View.SYSTEM_UI_FLAG_FULLSCREEN
| View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fullscreen2);
ActionBar actionBar = getSupportActionBar();
if (actionBar != null)
{
actionBar.hide();
}
mContentView = findViewById(R.id.fullscreen_content_text);
mContentView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE
| View.SYSTEM_UI_FLAG_FULLSCREEN
| View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
View decorView = getWindow().getDecorView();
decorView.setOnSystemUiVisibilityChangeListener
(new View.OnSystemUiVisibilityChangeListener()
{
@Override
public void onSystemUiVisibilityChange(int visibility)
{
System.out.println("print");
if ((visibility & View.SYSTEM_UI_FLAG_FULLSCREEN) == 0)
{
mContentView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE
| View.SYSTEM_UI_FLAG_FULLSCREEN
| View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
}
else
{
mContentView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE
| View.SYSTEM_UI_FLAG_FULLSCREEN
| View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
}
}
});
}
}
这是我的启动画面布局:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageView android:id="@+id/splashscreen" android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:background="@android:color/white"
android:src="@drawable/splash"
android:layout_gravity="center"/>
<TextView android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Hello World, splash"/>
</LinearLayout>
This is my fullscreen layout
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#0099cc"
>
<TextView
android:id="@+id/fullscreen_content_text"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:keepScreenOn="true"
android:text="@string/dummy_content2"
android:textColor="#33b5e5"
android:textSize="50sp"
android:textStyle="bold" />
</FrameLayout>
我希望这对你有所帮助
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