android webview打开软键盘闪退

最新推荐文章于 2024-05-29 10:07:10 发布

原创最新推荐文章于 2024-05-29 10:07:10 发布 · 849 阅读

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本文介绍了如何解决Android WebView在打开软键盘时出现应用闪退的问题。通过添加特定代码和调整manifest文件中的Activity设置，可以避免5497错误，确保WebView正常运行。

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看名字就知道，它是专门用来对付"5497"问题的，使用步骤也是超级简单：

把AndroidBug5497Workaround类复制到项目中
在需要填坑的activity的onCreate方法中添加一句AndroidBug5497Workaround.assistActivity(this)
在mainfest 里面对面的activity设置 adjustpan。

class AndroidBug5497Workaround constructor(activity: Activity) {
    private val contentContainer = activity.findViewById(android.R.id.content) as ViewGroup
    private val rootView = contentContainer.getChildAt(0)
    private val rootViewLayout = rootView.layoutParams as FrameLayout.LayoutParams
    private val viewTreeObserver = rootView.viewTreeObserver
    private val listener = ViewTreeObserver.OnGlobalLayoutListener { possiblyResizeChildOfContent() }

    private val contentAreaOfWindowBounds = Rect()
    private var usableHeightPrevious = 0

    // I call this in "onResume()" of my fragment
    fun addListener() {
        viewTreeObserver.addOnGlobalLayoutListener(listener)
    }

    // I call this in "onPause()" of my fragment
    fun removeListener() {
        viewTreeObserver.removeOnGlobalLayoutListener(listener)
    }

    private fun possiblyResizeChildOfContent() {
        contentContainer.getWindowVisibleDisplayFrame(contentAreaOfWindowBounds)
        val usableHeightNow = contentAreaOfWindowBounds.height()
        if (usableHeightNow != usableHeightPrevious) {
            rootViewLayout.height = usableHeightNow
            // Change the bounds of the root view to prevent gap between keyboard and content, and top of content positioned above top screen edge.
            rootView.layout(contentAreaOfWindowBounds.left, contentAreaOfWindowBounds.top, contentAreaOfWindowBounds.right, contentAreaOfWindowBounds.bottom)
            rootView.requestLayout()

            usableHeightPrevious = usableHeightNow
        }
    }
}