【Android】获取状态栏高度、导航栏高度、全面屏尺寸的方法总结

1. 获取屏幕高度

---

/**
   * Get screen height
   * The first one is to read the heightPixels parameter of DisplayMetrics
 */
private fun getScreenHeight(context: Context): Int {
    return context.resources?.displayMetrics?.heightPixels ?: 0
}

/**
   * Get screen Real height
   * The second type is to read the defaultDisplay parameter in windowManager
 */
@Volatile
private var sRealSizes = arrayOfNulls<Point>(2)
private fun getScreenRealHeight(context: Context): Int {
    var orientation = context.resources?.configuration?.orientation
    orientation = if (orientation == 1) 0 else 1
    if (sRealSizes[orientation] == null) {
        val windowManager = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
        val display = windowManager.defaultDisplay
        val point = Point()
        display.getRealSize(point)
        sRealSizes[orientation] = point
    }
    return sRealSizes[orientation]?.y ?: getScreenRealHeight(context)
}
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当我们使用上述代码获取屏幕高度时，会发现在不同case下获取高度不同：

case1：非全面屏带有navigation bar

收集屏幕高度1920，但是由于navitaionbar的存在，实际有效区域的高度只有1794

case2：非全面屏不带有navigation bar

没有navigationbar时，获取的实际有效高度也是1920

case3：全面屏

全面屏下，即使没有navigationbar，有效高度与实际高度依然不等，所以全面屏中尽量使用getScreenRealHeight获取屏幕高度

结论

综上，各种case下获取屏幕高度方法

if (DeviceUtils.isAllScreenDevice()) {
    // The full screen needs to get the height through this method
    screenHeight = DisplayUtils.getScreenRealHeight(getContext());
} else {
    screenHeight = DisplayUtils.getScreenHeight(getContext());
}
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2. 获取屏幕宽度

---

private fun getScreenWidth(context: Context): Int {
    return context.resources?.displayMetrics?.widthPixels ?: 0
}

private fun getScreenRealWidth(context: Context): Int {
    var orientation = context.resources?.configuration?.orientation
    orientation = if (orientation == 1) 0 else 1
    if (sRealSizes[orientation] == null) {
        val windowManager = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
        val display = windowManager.defaultDisplay
        val point = Point()
        display.getRealSize(point)
        sRealSizes[orientation] = point
    }
    return sRealSizes[orientation]?.x ?: getScreenWidth(context)
}
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3. 状态栏(status bar)高度

---

private fun getStatusBarHeight(window: Window, context: Context): Int {
    val localRect = Rect()
    window.decorView.getWindowVisibleDisplayFrame(localRect)
    var mStatusBarHeight = localRect.top
    if (0 == mStatusBarHeight) {
        try {
            val localClass = Class.forName("com.android.internal.R\$dimen")
            val localObject = localClass.newInstance()
            val i5 =
                localClass.getField("status_bar_height")[localObject].toString().toInt()
            mStatusBarHeight = context.resources.getDimensionPixelSize(i5)
        } catch (var6: ClassNotFoundException) {
            var6.printStackTrace()
        } catch (var7: IllegalAccessException) {
            var7.printStackTrace()
        } catch (var8: InstantiationException) {
            var8.printStackTrace()
        } catch (var9: NumberFormatException) {
            var9.printStackTrace()
        } catch (var10: IllegalArgumentException) {
            var10.printStackTrace()
        } catch (var11: SecurityException) {
            var11.printStackTrace()
        } catch (var12: NoSuchFieldException) {
            var12.printStackTrace()
        }
    }
    if (0 == mStatusBarHeight) {
        val resourceId: Int =
            context.resources.getIdentifier("status_bar_height", "dimen", "android")
        if (resourceId > 0) {
            mStatusBarHeight = context.resources.getDimensionPixelSize(resourceId)
        }
    }
    return mStatusBarHeight
}
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4. 导航栏(gavigation bar)高度

---

 private fun getNavigationBarHeight(context: Context): Int {
    val rid: Int =
        context.resources.getIdentifier("config_showNavigationBar", "bool", "android")
    return if (rid != 0) {
        val resourceId: Int =
            context.resources.getIdentifier("navigation_bar_height", "dimen", "android")
        context.resources.getDimensionPixelSize(resourceId)
    } else {
        0
    }
}
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5. 判断是否全面屏

---

private fun isAllScreenDevice(context: Context): Boolean {
    if (VERSION.SDK_INT < 21) {
        return false
    } else {
        val windowManager = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
        val display = windowManager.defaultDisplay
        val point = Point()
        display.getRealSize(point)
        val width: Float
        val height: Float
        if (point.x < point.y) {
            width = point.x.toFloat()
            height = point.y.toFloat()
        } else {
            width = point.y.toFloat()
            height = point.x.toFloat()
        }
        if (height / width >= 1.97f) {
            return true
        }
        return false
    }
}
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