一、布局文件里面定义一个ImageView。
<?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">
<ImageView
android:id="@+id/backgroundphoto"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/girl"
android:visibility="visible"/>
</androidx.constraintlayout.widget.ConstraintLayout>
二、默认的显示效果如下,有状态栏和TitleBar。
三、去掉TitleBar的方法:src\main\AndroidManifest.xml文件里面用这个theme,可以看到状态栏背景是黑的。
android:theme="@style/Theme.AppCompat.NoActionBar"
三、把状态栏透明,图片是全屏显示了,如果设置代码成FLAG_FULLSCREEN ,就看不到状态栏里面的内容,图片全屏显示。效果如下。(状态栏不完全透明)
getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);//FLAG_FORCE_NOT_FULLSCREEN FLAG_FULLSCREEN FLAG_TRANSLUCENT_STATUS
四、把状态栏背景完全透明。
public class MainActivity extends AppCompatActivity {
public void setFullscreen(boolean isShowStatusBar, boolean isShowNavigationBar) {
int uiOptions = View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
if (!isShowStatusBar) {
uiOptions |= View.SYSTEM_UI_FLAG_FULLSCREEN;
}
if (!isShowNavigationBar) {
uiOptions |= View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
}
getWindow().getDecorView().setSystemUiVisibility(uiOptions);
//隐藏标题栏
// getSupportActionBar().hide();
setNavigationStatusColor(Color.TRANSPARENT);
}
public void setNavigationStatusColor(int color) {
//VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP
if (Build.VERSION.SDK_INT >= 21) {
getWindow().addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
getWindow().setNavigationBarColor(color);
getWindow().setStatusBarColor(color);
}
}
五、上面的效果是全屏显示了,但是状态栏的字体是白色的,非常难看,现在要把状态栏的字体改成黑色。显示的效果如下:
private static void setAndroidNativeLightStatusBar(Activity activity, boolean dark) {
View decor = activity.getWindow().getDecorView();
if (dark) {
decor.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
} else {
decor.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
}
}
六、修改之后的代码
package com.giada.giadademo;
import androidx.appcompat.app.AppCompatActivity;
import android.app.Activity;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.view.View;
import android.view.WindowManager;
public class MainActivity extends AppCompatActivity {
public void setFullscreen(boolean isShowStatusBar, boolean isShowNavigationBar) {
int uiOptions = View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
if (!isShowStatusBar) {
uiOptions |= View.SYSTEM_UI_FLAG_FULLSCREEN;
}
if (!isShowNavigationBar) {
uiOptions |= View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
}
getWindow().getDecorView().setSystemUiVisibility(uiOptions);
//隐藏标题栏
// getSupportActionBar().hide();
setNavigationStatusColor(Color.TRANSPARENT);
}
public void setNavigationStatusColor(int color) {
//VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP
if (Build.VERSION.SDK_INT >= 21) {
getWindow().addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
getWindow().setNavigationBarColor(color);
getWindow().setStatusBarColor(color);
}
}
private static void setAndroidNativeLightStatusBar(Activity activity, boolean dark) {
View decor = activity.getWindow().getDecorView();
if (dark) {
decor.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
} else {
decor.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setFullscreen(true, true);
setAndroidNativeLightStatusBar(this, true);
}
}
七、有价值的参考文章
Android沉浸式全屏讲解(状态栏、导航栏处理) - 简书