android快速实现沉浸式

android实现沉浸式之前一直没有这方面的需求，也一直没有做，今天做了一下写了个工具类，分享给大家，废话不多说直接上代码。

package 自己的包名;

import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Build;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;

/************************************************************
 * Author: ssc
 * Date： 2017/9/29
 * Version: 1.0
 * Description:沉浸式状态栏工具类
 * History:
 * <author>  <time>   <version >   <desc>
 ***********************************************************/

public class StatusBarCompat {

    private static final int INVALID_VAL = -1;
    private static final int COLOR_DEFAULT = Color.parseColor("#20000000");

    public static void compat(Activity activity, int statusColor) {
        compat(activity, statusColor, false);
    }

    public static void compat(Activity activity, int statusColor, boolean isFitsSystemWindows) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
            int flagTranslucentStatus = WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS;
            int flagTranslucentNavigation = WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION;
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                //5.x开始需要把颜色设置透明，否则导航栏会呈现系统默认的浅灰色
                Window window = activity.getWindow();
                View decorView = window.getDecorView();
                //两个 flag 要结合使用，表示让应用的主体内容占用系统状态栏的空间
                int option = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                        | View.SYSTEM_UI_FLAG_LAYOUT_STABLE;
                decorView.setSystemUiVisibility(option);
                window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
                window.setStatusBarColor(Color.TRANSPARENT);
                //导航栏颜色也可以正常设置
//                window.setNavigationBarColor(Color.TRANSPARENT);
            } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
                Window window = activity.getWindow();
                WindowManager.LayoutParams attributes = window.getAttributes();
                attributes.flags |= flagTranslucentStatus;
                window.setAttributes(attributes);
            }
        }

        //设置 paddingTop
        //当前手机版本为5.0及以上
        ViewGroup rootView = (ViewGroup) activity.getWindow().getDecorView().findViewById(android.R.id.content);
        if (!isFitsSystemWindows) {
            rootView.setPadding(0, getStatusBarHeight(activity), 0, 0);
        } else {
            rootView.setPadding(0, 0, 0, 0);
        }
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            if (statusColor != INVALID_VAL) {
                activity.getWindow().setStatusBarColor(statusColor);
            }
            return;
        }
        //当前手机版本为4.4
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
            int color = COLOR_DEFAULT;
            //根布局添加占位状态栏
            ViewGroup decorView = (ViewGroup) activity.getWindow().getDecorView();
            if (statusColor != INVALID_VAL) {
                color = statusColor;
            }
            View statusBarView = new View(activity);
            ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                    getStatusBarHeight(activity));
            statusBarView.setBackgroundColor(color);
            decorView.addView(statusBarView, lp);
        }
    }

    public static void compat(Activity activity) {
        compat(activity, INVALID_VAL);
    }


    public static int getStatusBarHeight(Context context) {
        int result = 0;
        int resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android");
        if (resourceId > 0) {
            result = context.getResources().getDimensionPixelSize(resourceId);
        }
        return result;
    }
}

以上是一个工具类，使用的时候只需要在activity中oncreate方法中调用StatusBarCompat.compat(this,ContextCompat.getColor(this,R.color.common_titlebar_background));

其中第一个参数为当前activity

第二个参数为状态栏的色值

第三个参数是否在布局上添加了android:fitsSystemWindows="true"这个属性，（主要解决输入法弹出内容无法顶起来问题，如果该界面没有该需求这个属性默认false就可以）