Android中三星折叠屏在多窗口运行时侵入式状态栏的适配问题

问题描述：

当页面使用fitsSystemWindow属性时，目的之一是想让窗口自动适配状态栏，但是目前发现有特殊设备在特殊情况下会丢失状态栏(的高度)，比如三星折叠屏在多窗口运行时fitsSystemWindow属性不能生效，具体现象是顶部内容被一个横杠遮挡

解决方案：

运行时获取statusBar的高度，并修正页面根布局的高度

工具类代码如下：

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.WindowManager
import android.widget.FrameLayout
import androidx.annotation.ColorRes
import com.kongfz.app.core.R
import com.kongfz.app.core.common.drive.extend.catchExceptions
import com.kongfz.app.core.common.utils.blankj.util.Utils

object StatusBarUtils {
    @Target(AnnotationTarget.VALUE_PARAMETER, AnnotationTarget.TYPE)
    @Retention(AnnotationRetention.SOURCE)
    annotation class FakeStatusBarCfg {
        companion object {
            //永远不需要，上层自行调整布局高度。
            //适用页面：顶部是沉浸式图片类型
            const val NEVER_NEED = 0

            //永远需要
            //适用页面：普通的顶部，并且没有使用fitsSystemWindow
            const val ALWAYS_NEED = 1

            //如果丢失就需要，否则不需要
            //适用页面：普通的顶部，并且使用了fitsSystemWindow
            const val NEED_WHEN_LOST = 2

        }
    }

    fun setStatusBarFontIconLight(activity: Activity, isLightIcon: Boolean) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            val decorView = activity.window.decorView
            val option = (View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                    or View.SYSTEM_UI_FLAG_LAYOUT_STABLE)
            decorView.systemUiVisibility = option
            if (isLightIcon) {
                activity.window.statusBarColor = Color.TRANSPARENT
            } else {
                activity.window.statusBarColor = Color.WHITE
            }
        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
            val localLayoutParams = activity.window.attributes
            localLayoutParams.flags =
                WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS or localLayoutParams.flags
        }
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && !isLightIcon) {
            //android6.0以后可以对状态栏文字颜色和图标进行修改
            activity.window.decorView.systemUiVisibility =
                View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR
        }
    }

    fun getStatusBarHeight(context: Context): Int {
        val resources = context.resources
        val resourceId = resources.getIdentifier("status_bar_height", "dimen", "android")
        return resources.getDimensionPixelSize(resourceId)
    }

    @JvmStatic
    val statusBarHeight: Int
        get() {
            val resources =
                Utils.getApp().resources
            val resourceId =
                resources.getIdentifier("status_bar_height", "dimen", "android")
            return resources.getDimensionPixelSize(resourceId)
        }

    /**
     * 运行时获取statusBar的高度，并修正根布局的h
     */
    @JvmStatic
    fun fixStatusHeight(view: View) {
        val h = getStatusBarHeight(Utils.getApp())
        val lp = view.layoutParams as ViewGroup.MarginLayoutParams
        lp.setMargins(0, h, 0, 0)
        view.layoutParams = lp
    }

    fun tryAddingFakeStatusBar(
        activity: Activity,
        fakeStatusBarCfg: @FakeStatusBarCfg Int,
        rootView: ViewGroup,
        @ColorRes color: Int
    ) {
        if (fakeStatusBarCfg == FakeStatusBarCfg.NEED_WHEN_LOST) {
            addFakeStatusBarWhenLost(activity, rootView, color)
        } else if (fakeStatusBarCfg == FakeStatusBarCfg.ALWAYS_NEED) {
            addFakeStatusBar(activity, rootView, color)
        }
    }

    private fun addFakeStatusBarWhenLost(
        activity: Activity,
        rootView: ViewGroup,
        @ColorRes color: Int
    ) {
        if (willLossStatusBar(activity))
            addFakeStatusBar(activity, rootView, color)
    }

    private fun addFakeStatusBar(
        activity: Activity,
        rootView: ViewGroup,
        @ColorRes color: Int
    ) {
        catchExceptions {
            val decorView = activity.window.decorView as ViewGroup
            decorView.findViewById<View>(R.id.un_status_bar_view)?.let {
                decorView.removeView(it)
            }
            val view = View(activity).apply {
                id = R.id.un_status_bar_view
                layoutParams =
                    ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, statusBarHeight)
                setBackgroundResource(color)
            }
            decorView.addView(view)
            //添加status view后，需将原始布局下移
            val lp = rootView.layoutParams as FrameLayout.LayoutParams
            lp.topMargin = statusBarHeight
        }
    }

    /**
     * 状态栏是否会丢失
     *
     * 少量特殊设备在多窗口模式下运行，会丢失状态栏!
     *
     * 这个方法上层可以直接使用，自行处理根布局的高度
     *
     */
    fun willLossStatusBar(activity: Activity): Boolean {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            //这个条件以后也许会变!
            if (activity.isInMultiWindowMode
                && Build.MODEL == "SM-F9160"
//                && Build.VERSION.SDK_INT == 33
            ) {
                //SM-F9160是三星折叠屏手机，它在多窗口下，会丢失status bar
                return true
            }
        }
        return false
    }
}

实际使用：

activity的基类

 private fun initStatus() {
        StatusBarUtils.tryAddingFakeStatusBar(
            this,
            fakeStatusBarCfg(), //StatusBarUtils中FakeStatusBarCfg的值
            baseBinding.root,
            statusBarColor() //沉浸式状态栏的颜色
        )
       
        
         //设置沉浸状态栏——根据实际情况来写
            immersionBar = ImmersionBar.with(this)
            immersionBar?.run {
                statusBarColor(statusBarColor())
                statusBarDarkFont(statusBarDarkFont())
                init()  
     
    }

//子类复写
 protected open fun statusBarColor(): Int {
        return R.color.transparent
    }

//这个方法为Java代码，其余为Kotlin代码——子类复写
 protected @StatusBarUtils.FakeStatusBarCfg int fakeStatusBarCfg() {
        return StatusBarUtils.FakeStatusBarCfg.NEED_WHEN_LOST;
    }

//子类复写
 protected open fun statusBarDarkFont(): Boolean {
        return !NightModeUtils().isNight()
    }