沉浸式状态栏，状态栏调色_windowinsetsnavhostfragment

工具类

import android.app.Activity;
import android.graphics.Color;
import android.os.Build;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
 
public class StatusBar {
    /**
     * 6.0以上的沉浸式布局
     * 6.0以上才可以修改字体颜色
     *
     * @param activity Activity
     */
    public static void fitSystemBar(Activity activity) {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
            return;
        }
        Window window = activity.getWindow();
        View decorView = window.getDecorView();
        // 1.View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN--能够使得我们的页面布局延伸到状态栏之下，但不会隐藏状态栏，
        // 也就相当于状态栏是遮盖在布局之上的，两者重叠
        // View.SYSTEM_UI_FLAG_FULLSCREEN -- 能够使得我们的页面布局延伸到状态栏，但是会隐藏状态栏。状态栏不显示，
        // View.SYSTEM_UI_FLAG_FULLSCREEN 作用等同于 WindowManager.LayoutParams.FLAG_FULLSCREEN
        // 2.View.SYSTEM_UI_FLAG_LAYOUT_STABLE 稳定的布局，兼顾虚拟导航键
        // 3.View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR 亮色的状态栏（白底黑字）
        decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |
                View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
                View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
        // 4.WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS，允许对状态栏开启绘制
        window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
        window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
        // 5.指定状态栏颜色，默认是灰色
        window.setStatusBarColor(Color.TRANSPARENT);
    }
 
    /**
     * 6.0及以上的状态栏色调
     *
     * @param activity
     * @param light    true:白底黑字,false:黑底白字
     */
    public static void lightStatusBar(Activity activity, boolean light) {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
            return;
        }
        Window window = activity.getWindow();
        View decorView = window.getDecorView();
        int visibility = decorView.getSystemUiVisibility();
        if (light) {
            visibility |= View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
        } else {
            visibility &= ~View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
        }
        decorView.setSystemUiVisibility(visibility);
    }
}

使用：

StatusBar.fitSystemBar(this)

同时，需要在调用页面的根布局中加入属性：

    android:fitsSystemWindows="true"

如果在 NavHostFragment 中使用沉浸式状态栏需要重写 NavHostFragment 中的方法：

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
 
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.navigation.fragment.NavHostFragment;
 
public class WindowInsetsNavHostFragment extends NavHostFragment {
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        WindowInsetsFrameLayout layout = new WindowInsetsFrameLayout(inflater.getContext());
        layout.setId(getId());
        return layout;
    }
}

同时重写FrameLayout中的方法：

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.WindowInsets;
import android.widget.FrameLayout;
 
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
 
public class WindowInsetsFrameLayout extends FrameLayout {
    public WindowInsetsFrameLayout(@NonNull Context context) {
        super(context);
    }
 
    public WindowInsetsFrameLayout(@NonNull Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }
 
    public WindowInsetsFrameLayout(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }
 
    public WindowInsetsFrameLayout(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
    }
 
    /**
     * 请求重新分发布局事件
     * @param child View
     */
    @Override
    public void addView(View child) {
        super.addView(child);
        requestApplyInsets();
    }
 
    /**
     * 重写dispatchApplyWindowInsets方法，让事件全部都分发
     *
     * @param insets WindowInsets
     * @return WindowInsets
     */
    @Override
    public WindowInsets dispatchApplyWindowInsets(WindowInsets insets) {
        WindowInsets windowInsets = super.dispatchApplyWindowInsets(insets);
        if (!insets.isConsumed()) {
            int childCount = getChildCount();
            for (int i = 0; i < childCount; i++) {
                windowInsets = getChildAt(i).dispatchApplyWindowInsets(insets);
            }
        }
        return windowInsets;
    }
}

原因是因为沉浸式布局应用在 NavHostFragment 中时，由于添加的Fragment只会分发一次重新布局的事件，只会有第一个Fragment有效果，重写上面方法会使得所有Fragment都比分发到事件