DrawerLayout沉浸式状态栏

在开发过程中，往往在UI上需要用到沉浸式状态栏
但是有很多坑在里面
在DrawerLayout（侧滑抽屉）为根部局的时候，网上找到的沉浸式状态栏代码往往会失效

要么是可以状态栏改颜色，而抽屉画出来的时候还是哪个颜色，遮挡抽屉就算了，还很不协调

要么就是可以做半透明了，抽屉出来也正常了，但是不能修改沉浸色

两种都很丑

简单的解决方式：
DrawerLayout下面会有一个CoordinatorLayout，里面是APPBar的内容，AppBarLayout、Toolbar、和
TabLayout之类

一般是要么DrawerLayout可以沉浸，划出半透明，但是状态栏无法自定义颜色，要么就是状态栏可以变颜色，但是抽屉画出来还是那个颜色，很丑

下面给出解决办法，顺道附上在网上找到的状态栏处理类：

只需要在DrawerLayout下面的CoordinatorLayout外面包上一层LinearLayout，设成竖向布局就可以了（可能是因为AppBarLayout给状态栏染色了，但我也不清楚哈）

<android.support.v4.widget.DrawerLayout 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:id="@+id/drawer_layout"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:fitsSystemWindows="true"    tools:openDrawer="start">    <LinearLayout        android:layout_width="match_parent"        android:layout_height="match_parent"        android:orientation="vertical">        <android.support.design.widget.CoordinatorLayout            android:layout_width="match_parent"            android:layout_height="match_parent">

这就可以了，，状态栏处理类(这个是在网上下载的别人的，在正常的activity内部是正常的，但是在有抽屉的界面异常，使用我上面的方法就可以使用，感谢原作者)：

package com.example.jinha.wlwlab;import android.annotation.TargetApi;import android.app.Activity;import android.content.Context;import android.graphics.Color;import android.os.Build;import android.support.annotation.ColorInt;import android.support.annotation.IntRange;import android.support.design.widget.CoordinatorLayout;import android.support.v4.widget.DrawerLayout;import android.view.View;import android.view.ViewGroup;import android.view.WindowManager;import android.widget.LinearLayout;/** * Created by Jaeger on 16/2/14. * <p> * Email: [e-mail] * GitHub: https://github.com/laobie */public class StatusBarUtil {    public static final int DEFAULT_STATUS_BAR_ALPHA = 112;    private static final int FAKE_STATUS_BAR_VIEW_ID = R.id.statusbarutil_fake_status_bar_view;    private static final int FAKE_TRANSLUCENT_VIEW_ID = R.id.statusbarutil_translucent_view;    private static final int TAG_KEY_HAVE_SET_OFFSET = -123;    /**     * 设置状态栏颜色     *     * @param activity 需要设置的 activity     * @param color    状态栏颜色值     */    public static void setColor(Activity activity, @ColorInt int color) {        setColor(activity, color, DEFAULT_STATUS_BAR_ALPHA);    }    /**     * 设置状态栏颜色     *     * @param activity       需要设置的activity     * @param color          状态栏颜色值     * @param statusBarAlpha 状态栏透明度     */    public static void setColor(Activity activity, @ColorInt int color, @IntRange(from = 0, to = 255) int statusBarAlpha) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);            activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);            activity.getWindow().setStatusBarColor(calculateStatusColor(color, statusBarAlpha));        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);            ViewGroup decorView = (ViewGroup) activity.getWindow().getDecorView();            View fakeStatusBarView = decorView.findViewById(FAKE_STATUS_BAR_VIEW_ID);            if (fakeStatusBarView != null) {                if (fakeStatusBarView.getVisibility() == View.GONE) {                    fakeStatusBarView.setVisibility(View.VISIBLE);                }                fakeStatusBarView.setBackgroundColor(calculateStatusColor(color, statusBarAlpha));            } else {                decorView.addView(createStatusBarView(activity, color, statusBarAlpha));            }            setRootView(activity);        }    }    /**     * 为滑动返回界面设置状态栏颜色     *     * @param activity 需要设置的activity     * @param color    状态栏颜色值     */    public static void setColorForSwipeBack(Activity activity, int color) {        setColorForSwipeBack(activity, color, DEFAULT_STATUS_BAR_ALPHA);    }    /**     * 为滑动返回界面设置状态栏颜色     *     * @param activity       需要设置的activity     * @param color          状态栏颜色值     * @param statusBarAlpha 状态栏透明度     */    public static void setColorForSwipeBack(Activity activity, @ColorInt int color,                                            @IntRange(from = 0, to = 255) int statusBarAlpha) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {            ViewGroup contentView = ((ViewGroup) activity.findViewById(android.R.id.content));            View rootView = contentView.getChildAt(0);            int statusBarHeight = getStatusBarHeight(activity);            if (rootView != null && rootView instanceof CoordinatorLayout) {                final CoordinatorLayout coordinatorLayout = (CoordinatorLayout) rootView;                if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {                    coordinatorLayout.setFitsSystemWindows(false);                    contentView.setBackgroundColor(calculateStatusColor(color, statusBarAlpha));                    boolean isNeedRequestLayout = contentView.getPaddingTop() < statusBarHeight;                    if (isNeedRequestLayout) {                        contentView.setPadding(0, statusBarHeight, 0, 0);                        coordinatorLayout.post(new Runnable() {                            @Override                            public void run() {                                coordinatorLayout.requestLayout();                            }                        });                    }                } else {                    coordinatorLayout.setStatusBarBackgroundColor(calculateStatusColor(color, statusBarAlpha));                }            } else {                contentView.setPadding(0, statusBarHeight, 0, 0);                contentView.setBackgroundColor(calculateStatusColor(color, statusBarAlpha));            }            setTransparentForWindow(activity);        }    }    /**     * 设置状态栏纯色 不加半透明效果     *     * @param activity 需要设置的 activity     * @param color    状态栏颜色值     */    public static void setColorNoTranslucent(Activity activity, @ColorInt int color) {        setColor(activity, color, 0);    }    /**     * 设置状态栏颜色(5.0以下无半透明效果,不建议使用)     *     * @param activity 需要设置的 activity     * @param color    状态栏颜色值     */    @Deprecated    public static void setColorDiff(Activity activity, @ColorInt int color) {        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {            return;        }        transparentStatusBar(activity);        ViewGroup contentView = (ViewGroup) activity.findViewById(android.R.id.content);        // 移除半透明矩形,以免叠加        View fakeStatusBarView = contentView.findViewById(FAKE_STATUS_BAR_VIEW_ID);        if (fakeStatusBarView != null) {            if (fakeStatusBarView.getVisibility() == View.GONE) {                fakeStatusBarView.setVisibility(View.VISIBLE);            }            fakeStatusBarView.setBackgroundColor(color);        } else {            contentView.addView(createStatusBarView(activity, color));        }        setRootView(activity);    }    /**     * 使状态栏半透明     * <p>     * 适用于图片作为背景的界面,此时需要图片填充到状态栏     *     * @param activity 需要设置的activity     */    public static void setTranslucent(Activity activity) {        setTranslucent(activity, DEFAULT_STATUS_BAR_ALPHA);    }    /**     * 使状态栏半透明     * <p>     * 适用于图片作为背景的界面,此时需要图片填充到状态栏     *     * @param activity       需要设置的activity     * @param statusBarAlpha 状态栏透明度     */    public static void setTranslucent(Activity activity, @IntRange(from = 0, to = 255) int statusBarAlpha) {        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {            return;        }        setTransparent(activity);        addTranslucentView(activity, statusBarAlpha);    }    /**     * 针对根布局是 CoordinatorLayout, 使状态栏半透明     * <p>     * 适用于图片作为背景的界面,此时需要图片填充到状态栏     *     * @param activity       需要设置的activity     * @param statusBarAlpha 状态栏透明度     */    public static void setTranslucentForCoordinatorLayout(Activity activity, @IntRange(from = 0, to = 255) int statusBarAlpha) {        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {            return;        }        transparentStatusBar(activity);        addTranslucentView(activity, statusBarAlpha);    }    /**     * 设置状态栏全透明     *     * @param activity 需要设置的activity     */    public static void setTransparent(Activity activity) {        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {            return;        }        transparentStatusBar(activity);        setRootView(activity);    }    /**     * 使状态栏透明(5.0以上半透明效果,不建议使用)     * <p>     * 适用于图片作为背景的界面,此时需要图片填充到状态栏     *     * @param activity 需要设置的activity     */    @Deprecated    public static void setTranslucentDiff(Activity activity) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {            // 设置状态栏透明            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);            setRootView(activity);        }    }    /**     * 为DrawerLayout 布局设置状态栏变色     *     * @param activity     需要设置的activity     * @param drawerLayout DrawerLayout     * @param color        状态栏颜色值     */    public static void setColorForDrawerLayout(Activity activity, DrawerLayout drawerLayout, @ColorInt int color) {        setColorForDrawerLayout(activity, drawerLayout, color, DEFAULT_STATUS_BAR_ALPHA);    }    /**     * 为DrawerLayout 布局设置状态栏颜色,纯色     *     * @param activity     需要设置的activity     * @param drawerLayout DrawerLayout     * @param color        状态栏颜色值     */    public static void setColorNoTranslucentForDrawerLayout(Activity activity, DrawerLayout drawerLayout, @ColorInt int color) {        setColorForDrawerLayout(activity, drawerLayout, color, 0);    }    /**     * 为DrawerLayout 布局设置状态栏变色     *     * @param activity       需要设置的activity     * @param drawerLayout   DrawerLayout     * @param color          状态栏颜色值     * @param statusBarAlpha 状态栏透明度     */    public static void setColorForDrawerLayout(Activity activity, DrawerLayout drawerLayout, @ColorInt int color,                                               @IntRange(from = 0, to = 255) int statusBarAlpha) {        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {            return;        }        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);            activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);            activity.getWindow().setStatusBarColor(Color.parseColor("#47AA71"));            activity.getWindow().setStatusBarColor(Color.TRANSPARENT);        } else {            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);        }        // 生成一个状态栏大小的矩形        // 添加 statusBarView 到布局中        ViewGroup contentLayout = (ViewGroup) drawerLayout.getChildAt(0);        View fakeStatusBarView = contentLayout.findViewById(FAKE_STATUS_BAR_VIEW_ID);        if (fakeStatusBarView != null) {            if (fakeStatusBarView.getVisibility() == View.GONE) {                fakeStatusBarView.setVisibility(View.VISIBLE);            }            fakeStatusBarView.setBackgroundColor(color);        } else {            contentLayout.addView(createStatusBarView(activity, color), 0);        }        // 内容布局不是 LinearLayout 时,设置padding top        if (!(contentLayout instanceof LinearLayout) && contentLayout.getChildAt(1) != null) {            contentLayout.getChildAt(1)                    .setPadding(contentLayout.getPaddingLeft(), getStatusBarHeight(activity) + contentLayout.getPaddingTop(),                            contentLayout.getPaddingRight(), contentLayout.getPaddingBottom());        }        // 设置属性        setDrawerLayoutProperty(drawerLayout, contentLayout);        addTranslucentView(activity, statusBarAlpha);    }    /**     * 设置 DrawerLayout 属性     *     * @param drawerLayout              DrawerLayout     * @param drawerLayoutContentLayout DrawerLayout 的内容布局     */    private static void setDrawerLayoutProperty(DrawerLayout drawerLayout, ViewGroup drawerLayoutContentLayout) {        ViewGroup drawer = (ViewGroup) drawerLayout.getChildAt(1);        drawerLayout.setFitsSystemWindows(false);        drawerLayoutContentLayout.setFitsSystemWindows(false);        drawerLayoutContentLayout.setClipToPadding(true);        drawer.setFitsSystemWindows(false);    }    /**     * 为DrawerLayout 布局设置状态栏变色(5.0以下无半透明效果,不建议使用)     *     * @param activity     需要设置的activity     * @param drawerLayout DrawerLayout     * @param color        状态栏颜色值     */    @Deprecated    public static void setColorForDrawerLayoutDiff(Activity activity, DrawerLayout drawerLayout, @ColorInt int color) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);            // 生成一个状态栏大小的矩形            ViewGroup contentLayout = (ViewGroup) drawerLayout.getChildAt(0);            View fakeStatusBarView = contentLayout.findViewById(FAKE_STATUS_BAR_VIEW_ID);            if (fakeStatusBarView != null) {                if (fakeStatusBarView.getVisibility() == View.GONE) {                    fakeStatusBarView.setVisibility(View.VISIBLE);                }                fakeStatusBarView.setBackgroundColor(calculateStatusColor(color, DEFAULT_STATUS_BAR_ALPHA));            } else {                // 添加 statusBarView 到布局中                contentLayout.addView(createStatusBarView(activity, color), 0);            }            // 内容布局不是 LinearLayout 时,设置padding top            if (!(contentLayout instanceof LinearLayout) && contentLayout.getChildAt(1) != null) {                contentLayout.getChildAt(1).setPadding(0, getStatusBarHeight(activity), 0, 0);            }            // 设置属性            setDrawerLayoutProperty(drawerLayout, contentLayout);        }    }    /**     * 为 DrawerLayout 布局设置状态栏透明     *     * @param activity     需要设置的activity     * @param drawerLayout DrawerLayout     */    public static void setTranslucentForDrawerLayout(Activity activity, DrawerLayout drawerLayout) {        setTranslucentForDrawerLayout(activity, drawerLayout, DEFAULT_STATUS_BAR_ALPHA);    }    /**     * 为 DrawerLayout 布局设置状态栏透明     *     * @param activity     需要设置的activity     * @param drawerLayout DrawerLayout     */    public static void setTranslucentForDrawerLayout(Activity activity, DrawerLayout drawerLayout,                                                     @IntRange(from = 0, to = 255) int statusBarAlpha) {        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {            return;        }        setTransparentForDrawerLayout(activity, drawerLayout);        addTranslucentView(activity, statusBarAlpha);    }    /**     * 为 DrawerLayout 布局设置状态栏透明     *     * @param activity     需要设置的activity     * @param drawerLayout DrawerLayout     */    public static void setTransparentForDrawerLayout(Activity activity, DrawerLayout drawerLayout) {        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {            return;        }        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);            activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);            activity.getWindow().setStatusBarColor(Color.TRANSPARENT);        } else {            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);        }        ViewGroup contentLayout = (ViewGroup) drawerLayout.getChildAt(0);        // 内容布局不是 LinearLayout 时,设置padding top        if (!(contentLayout instanceof LinearLayout) && contentLayout.getChildAt(1) != null) {            contentLayout.getChildAt(1).setPadding(0, getStatusBarHeight(activity), 0, 0);        }        // 设置属性        setDrawerLayoutProperty(drawerLayout, contentLayout);    }    /**     * 为 DrawerLayout 布局设置状态栏透明(5.0以上半透明效果,不建议使用)     *     * @param activity     需要设置的activity     * @param drawerLayout DrawerLayout     */    @Deprecated    public static void setTranslucentForDrawerLayoutDiff(Activity activity, DrawerLayout drawerLayout) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {            // 设置状态栏透明            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);            // 设置内容布局属性            ViewGroup contentLayout = (ViewGroup) drawerLayout.getChildAt(0);            contentLayout.setFitsSystemWindows(true);            contentLayout.setClipToPadding(true);            // 设置抽屉布局属性            ViewGroup vg = (ViewGroup) drawerLayout.getChildAt(1);            vg.setFitsSystemWindows(false);            // 设置 DrawerLayout 属性            drawerLayout.setFitsSystemWindows(false);        }    }    /**     * 为头部是 ImageView 的界面设置状态栏全透明     *     * @param activity       需要设置的activity     * @param needOffsetView 需要向下偏移的 View     */    public static void setTransparentForImageView(Activity activity, View needOffsetView) {        setTranslucentForImageView(activity, 0, needOffsetView);    }    /**     * 为头部是 ImageView 的界面设置状态栏透明(使用默认透明度)     *     * @param activity       需要设置的activity     * @param needOffsetView 需要向下偏移的 View     */    public static void setTranslucentForImageView(Activity activity, View needOffsetView) {        setTranslucentForImageView(activity, DEFAULT_STATUS_BAR_ALPHA, needOffsetView);    }    /**     * 为头部是 ImageView 的界面设置状态栏透明     *     * @param activity       需要设置的activity     * @param statusBarAlpha 状态栏透明度     * @param needOffsetView 需要向下偏移的 View     */    public static void setTranslucentForImageView(Activity activity, @IntRange(from = 0, to = 255) int statusBarAlpha,                                                  View needOffsetView) {        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {            return;        }        setTransparentForWindow(activity);        addTranslucentView(activity, statusBarAlpha);        if (needOffsetView != null) {            Object haveSetOffset = needOffsetView.getTag(TAG_KEY_HAVE_SET_OFFSET);            if (haveSetOffset != null && (Boolean) haveSetOffset) {                return;            }            ViewGroup.MarginLayoutParams layoutParams = (ViewGroup.MarginLayoutParams) needOffsetView.getLayoutParams();            layoutParams.setMargins(layoutParams.leftMargin, layoutParams.topMargin + getStatusBarHeight(activity),                    layoutParams.rightMargin, layoutParams.bottomMargin);            needOffsetView.setTag(TAG_KEY_HAVE_SET_OFFSET, true);        }    }    /**     * 为 fragment 头部是 ImageView 的设置状态栏透明     *     * @param activity       fragment 对应的 activity     * @param needOffsetView 需要向下偏移的 View     */    public static void setTranslucentForImageViewInFragment(Activity activity, View needOffsetView) {        setTranslucentForImageViewInFragment(activity, DEFAULT_STATUS_BAR_ALPHA, needOffsetView);    }    /**     * 为 fragment 头部是 ImageView 的设置状态栏透明     *     * @param activity       fragment 对应的 activity     * @param needOffsetView 需要向下偏移的 View     */    public static void setTransparentForImageViewInFragment(Activity activity, View needOffsetView) {        setTranslucentForImageViewInFragment(activity, 0, needOffsetView);    }    /**     * 为 fragment 头部是 ImageView 的设置状态栏透明     *     * @param activity       fragment 对应的 activity     * @param statusBarAlpha 状态栏透明度     * @param needOffsetView 需要向下偏移的 View     */    public static void setTranslucentForImageViewInFragment(Activity activity, @IntRange(from = 0, to = 255) int statusBarAlpha,                                                            View needOffsetView) {        setTranslucentForImageView(activity, statusBarAlpha, needOffsetView);        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {            clearPreviousSetting(activity);        }    }    /**     * 隐藏伪状态栏 View     *     * @param activity 调用的 Activity     */    public static void hideFakeStatusBarView(Activity activity) {        ViewGroup decorView = (ViewGroup) activity.getWindow().getDecorView();        View fakeStatusBarView = decorView.findViewById(FAKE_STATUS_BAR_VIEW_ID);        if (fakeStatusBarView != null) {            fakeStatusBarView.setVisibility(View.GONE);        }        View fakeTranslucentView = decorView.findViewById(FAKE_TRANSLUCENT_VIEW_ID);        if (fakeTranslucentView != null) {            fakeTranslucentView.setVisibility(View.GONE);        }    }    ///////////////////////////////////////////////////////////////////////////////////    @TargetApi(Build.VERSION_CODES.KITKAT)    private static void clearPreviousSetting(Activity activity) {        ViewGroup decorView = (ViewGroup) activity.getWindow().getDecorView();        View fakeStatusBarView = decorView.findViewById(FAKE_STATUS_BAR_VIEW_ID);        if (fakeStatusBarView != null) {            decorView.removeView(fakeStatusBarView);            ViewGroup rootView = (ViewGroup) ((ViewGroup) activity.findViewById(android.R.id.content)).getChildAt(0);            rootView.setPadding(0, 0, 0, 0);        }    }    /**     * 添加半透明矩形条     *     * @param activity       需要设置的 activity     * @param statusBarAlpha 透明值     */    private static void addTranslucentView(Activity activity, @IntRange(from = 0, to = 255) int statusBarAlpha) {        ViewGroup contentView = (ViewGroup) activity.findViewById(android.R.id.content);        View fakeTranslucentView = contentView.findViewById(FAKE_TRANSLUCENT_VIEW_ID);        if (fakeTranslucentView != null) {            if (fakeTranslucentView.getVisibility() == View.GONE) {                fakeTranslucentView.setVisibility(View.VISIBLE);            }            fakeTranslucentView.setBackgroundColor(Color.argb(statusBarAlpha, 0, 0, 0));        } else {            contentView.addView(createTranslucentStatusBarView(activity, statusBarAlpha));        }    }    /**     * 生成一个和状态栏大小相同的彩色矩形条     *     * @param activity 需要设置的 activity     * @param color    状态栏颜色值     * @return 状态栏矩形条     */    private static View createStatusBarView(Activity activity, @ColorInt int color) {        return createStatusBarView(activity, color, 0);    }    /**     * 生成一个和状态栏大小相同的半透明矩形条     *     * @param activity 需要设置的activity     * @param color    状态栏颜色值     * @param alpha    透明值     * @return 状态栏矩形条     */    private static View createStatusBarView(Activity activity, @ColorInt int color, int alpha) {        // 绘制一个和状态栏一样高的矩形        View statusBarView = new View(activity);        LinearLayout.LayoutParams params =                new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, getStatusBarHeight(activity));        statusBarView.setLayoutParams(params);        statusBarView.setBackgroundColor(calculateStatusColor(color, alpha));        statusBarView.setId(FAKE_STATUS_BAR_VIEW_ID);        return statusBarView;    }    /**     * 设置根布局参数     */    private static void setRootView(Activity activity) {        ViewGroup parent = (ViewGroup) activity.findViewById(android.R.id.content);        for (int i = 0, count = parent.getChildCount(); i < count; i++) {            View childView = parent.getChildAt(i);            if (childView instanceof ViewGroup) {                childView.setFitsSystemWindows(true);                ((ViewGroup) childView).setClipToPadding(true);            }        }    }    /**     * 设置透明     */    private static void setTransparentForWindow(Activity activity) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {            activity.getWindow().setStatusBarColor(Color.TRANSPARENT);            activity.getWindow()                    .getDecorView()                    .setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {            activity.getWindow()                    .setFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);        }    }    /**     * 使状态栏透明     */    @TargetApi(Build.VERSION_CODES.KITKAT)    private static void transparentStatusBar(Activity activity) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);            activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);            activity.getWindow().setStatusBarColor(Color.TRANSPARENT);        } else {            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);        }    }    /**     * 创建半透明矩形 View     *     * @param alpha 透明值     * @return 半透明 View     */    private static View createTranslucentStatusBarView(Activity activity, int alpha) {        // 绘制一个和状态栏一样高的矩形        View statusBarView = new View(activity);        LinearLayout.LayoutParams params =                new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, getStatusBarHeight(activity));        statusBarView.setLayoutParams(params);        statusBarView.setBackgroundColor(Color.argb(alpha, 0, 0, 0));        statusBarView.setId(FAKE_TRANSLUCENT_VIEW_ID);        return statusBarView;    }    /**     * 获取状态栏高度     *     * @param context context     * @return 状态栏高度     */    private static int getStatusBarHeight(Context context) {        // 获得状态栏高度        int resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android");        return context.getResources().getDimensionPixelSize(resourceId);    }    /**     * 计算状态栏颜色     *     * @param color color值     * @param alpha alpha值     * @return 最终的状态栏颜色     */    private static int calculateStatusColor(@ColorInt int color, int alpha) {        if (alpha == 0) {            return color;        }        float a = 1 - alpha / 255f;        int red = color >> 16 & 0xff;        int green = color >> 8 & 0xff;        int blue = color & 0xff;        red = (int) (red * a + 0.5);        green = (int) (green * a + 0.5);        blue = (int) (blue * a + 0.5);        return 0xff << 24 | red << 16 | green << 8 | blue;    }}