Android获取状态栏、导航栏的高度

发布于:2024-11-28 ⋅ 阅读:(12) ⋅ 点赞:(0)

Android获取状态栏的高度:

方法一:通过资源名称获取, getDimensionPixelSize,获取系统中"status_bar_height"的值,方法如下:

Java:

public static int getStatusBarHeight(Context context) {
    Resources resources = context.getResources();
    int resourceId = resources.getIdentifier("status_bar_height", "dimen", "android");
    int height = resources.getDimensionPixelSize(resourceId);
    return height;
}

Kotlin:

    fun getStatusBarHeight(context: Context): Int {
        var result = 0
        val resourceId = context.resources.getIdentifier("status_bar_height", "dimen", "android")
        if (resourceId > 0) {
            result = context.resources.getDimensionPixelSize(resourceId)
        }
        return result
    }
方法二:添加布局后获取

Kotlin:

 ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
            insets
        }
方法三:通过setOnApplyWindowInsetsListener
    fun getStatusBarHeightWithListener(activity: Activity, callback: (Int) -> Unit) {
        activity.window.decorView.setOnApplyWindowInsetsListener { v, insets ->
            val statusBarHeight = insets.systemWindowInsetTop
            callback(statusBarHeight)
            // 返回insets以允许其他监听器继续接收
            insets
        }
        // 触发布局以尽快调用监听器
        activity.window.decorView.requestLayout()
    }

调用:

    getStatusBarHeightWithListener(this) { statusBarHeight ->
            // 使用statusBarHeight
            LogUtils.i("getStatusBarHeightWithListener:${statusBarHeight}")
        }
方法四:通过 WindowInsets 获取

这种方法需要 API 20 (Android 4.4W) 以上,但在较新版本的 Android(API 21及以上)中更为准确。

fun getStatusBarHeight(activity: Activity): Int {
    val windowInsets = activity.window.decorView.rootWindowInsets
    return windowInsets?.systemWindowInsetTop ?: 0
}

注意:在 Android 11(API 30)及以上版本可以使用 WindowInsetsCompat 进行更兼容性友好的操作。

import androidx.core.view.WindowInsetsCompat
import androidx.core.view.ViewCompat

fun getStatusBarHeight(activity: Activity): Int {
    val insets = ViewCompat.getRootWindowInsets(activity.window.decorView)
    return insets?.systemWindowInsetTop ?: 0
}

这种方法直接获取会返回0,需要布局加载完成或者view.post中调用:

    mViewBinding.main.post {
              LogUtils.i("actionBarHeight:${getStatusBarHeight(this)}")
        }
方法五:使用固定值24dp(不推荐)

Android 9.0 frameworks/base/core/res/res/中有如下

    <!-- Height of the status bar -->
    <dimen name="status_bar_height">@dimen/status_bar_height_portrait</dimen>
    <!-- Height of the status bar in portrait -->
    <dimen name="status_bar_height_portrait">24dp</dimen>
    <!-- Height of the status bar in landscape -->
    <dimen name="status_bar_height_landscape">@dimen/status_bar_height_portrait</dimen>

可以看到status_bar_height只有一个定值24dp,因此可以直接使用

Android 9.0的frameworks/base/core/res/res目录源码:https://android.googlesource.com/platform/frameworks/base/+archive/refs/heads/pie-release-2/core/res/res.tar.gz
同理 navigation_bar_height 可以直接用48dp

Android获取导航栏的高度:

fun getNavigationBarHeight(context: Context): Int {
    var result = 0
    val resourceId = context.resources.getIdentifier("navigation_bar_height", "dimen", "android")
    if (resourceId > 0) {
        result = context.resources.getDimensionPixelSize(resourceId)
    }
    return result
}