透明状态栏的实现示例

//插入到OnCreate()中
if(Build.VERSION.SDK_INT >= 21) {
    
    
            Window window = getWindow();
            window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS
                    | WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
            window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                    | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
            window.setStatusBarColor(Color.TRANSPARENT);
            window.setNavigationBarColor(Color.TRANSPARENT);
            }

以下是效果图

改变状态栏文字颜色

public void changeStatusBarTextColor(Window window, boolean isBlack) {
    
    
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
    
    
            View decor = window.getDecorView();
            int flags = 0;
            if (isBlack) {
    
    
            	//更改文字颜色为深黑色
                flags = View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
            }
            else {
    
    
       			//更改文字颜色为浅色
                flags = View.SYSTEM_UI_FLAG_LAYOUT_STABLE;
            }
            decor.setSystemUiVisibility(flags);
        }
    }
    //记得调用。根据不同的背景色灵活调用函数

以下是效果图

沉浸模式

public class MainActivity extends AppCompatActivity {
    
    

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    
    
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
    
    
        super.onWindowFocusChanged(hasFocus);
        if (hasFocus && Build.VERSION.SDK_INT >= 19) {
    
    
            View decorView = getWindow().getDecorView();
            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);
        }
    }
}

效果图如下，这时候需要滑动顶部才会显示状态栏

隐藏及显示

①先在values的styles.xml中添加子标签：

<style name="NoTitle" parent="Theme.AppCompat.DayNight.NoActionBar">
 <item name="android:windowNoTitle">true</item>
 <item name="android:windowFullscreen">true</item>
</style> 

②在清单文件中，需要隐藏标题栏和状态栏的Activity引用此样式

<activity android:theme="@style/NoTitle"> 

这样设置即可实现顶部状态栏的隐藏