Android WindowsOfInputMode.AdjustResize仍在平移

我已经在几个活动中成功地实现了AdjustResize，但有一个活动仍然拒绝在显示键盘时执行任何操作，除了平移

知道我做错了什么吗

我使用的xamarin属性如下：

[Activity (
    LaunchMode=Android.Content.PM.LaunchMode.SingleTask, 
    Label = "Active Jobs", 
    MainLauncher = false, 
    Icon = "@drawable/icon", 
    WindowSoftInputMode = SoftInput.AdjustResize,
    ScreenOrientation = Android.Content.PM.ScreenOrientation.Portrait)]     

编辑：此活动的基础axml布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:minWidth="25px"
        android:minHeight="25px"
        android:background="#FFFFFF"
        android:gravity="center|top"
        android:paddingTop="20dp"
        android:paddingLeft="20dp"
        android:paddingRight="20dp"
        android:paddingBottom="40dp">
        <TextView
            android:text="No active works on this device."
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:padding="0dp"
            android:gravity="center"
            android:layout_centerHorizontal="true"
            android:layout_alignParentTop="true"
            android:visibility="gone"
            android:textColor="#006985"
            android:textSize="30dp" />
        <ListView
            android:minWidth="25px"
            android:minHeight="25px"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:gravity="center"
            android:textColor="#006985"
            android:textSize="30dp"
            android:divider="@null"
            android:dividerHeight="-0.6dp"
            android:layout_gravity="top" />
    </LinearLayout>
    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center|center"
        android:paddingLeft="40dp"
        android:paddingRight="40dp"
        android:paddingTop="40dp"
        android:paddingBottom="60dp"
        android:layout_alignParentBottom="true"
        android:visibility="gone"
        android:background="#006985"
        android:orientation="vertical">
        <EditText
            android:inputType="textNoSuggestions"
            android:layout_width="fill_parent"
            android:layout_height="80dp"
            android:background="#FFFFFF"
            android:textColor="#006985"
            android:textSize="30dp"
            android:paddingLeft="10dp"
            android:paddingRight="10dp"
            android:hint="Find..." />
        <Button
            android:text="Add New Task"
            android:layout_width="fill_parent"
            android:layout_height="100dp"
            android:background="@drawable/buttonHollowWhite"
            android:layout_centerHorizontal="true"
            android:textColor="#FFFFFF"
            android:textSize="30dp"
            android:layout_marginTop="40dp"
            android:layout_gravity="center" />
    </LinearLayout>
</RelativeLayout>

我已经将一个工作环境转换为Xamarin.Android，基于

要实现修复，只需在活动的

OnCreate

方法中添加以下代码

AndroidBug5497WorkaroundForXamarinAndroid.assistActivity (this);

全班为：

public class AndroidBug5497WorkaroundForXamarinAndroid {

    // For more information, see https://code.google.com/p/android/issues/detail?id=5497
    // To use this class, simply invoke assistActivity() on an Activity that already has its content view set.

    // CREDIT TO Joseph Johnson (https://stackoverflow.com/users/341631/joseph-johnson) for publishing the original Android solution on stackoverflow.com

    public static void assistActivity (Activity activity) {
        new AndroidBug5497WorkaroundForXamarinAndroid(activity);
    }

    private View mChildOfContent;
    private int usableHeightPrevious;
    private FrameLayout.LayoutParams frameLayoutParams;

    private AndroidBug5497WorkaroundForXamarinAndroid(Activity activity) {
        FrameLayout content = (FrameLayout) activity.FindViewById(Android.Resource.Id.Content);
        mChildOfContent = content.GetChildAt(0);
        ViewTreeObserver vto = mChildOfContent.ViewTreeObserver;
        vto.GlobalLayout += (object sender, EventArgs e) => {
            possiblyResizeChildOfContent();
        };
        frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.LayoutParameters;
    }

    private void possiblyResizeChildOfContent() {
        int usableHeightNow = computeUsableHeight();
        if (usableHeightNow != usableHeightPrevious) {
            int usableHeightSansKeyboard = mChildOfContent.RootView.Height;
            int heightDifference = usableHeightSansKeyboard - usableHeightNow;
            if (heightDifference > (usableHeightSansKeyboard/4)) {
                // keyboard probably just became visible
                frameLayoutParams.Height = usableHeightSansKeyboard - heightDifference;
            } else {
                // keyboard probably just became hidden
                frameLayoutParams.Height = usableHeightSansKeyboard;
            }
            mChildOfContent.RequestLayout();
            usableHeightPrevious = usableHeightNow;
        }
    }

    private int computeUsableHeight() {
        Rect r = new Rect ();
        mChildOfContent.GetWindowVisibleDisplayFrame(r);
        return (r.Bottom - r.Top);
    }

}

---

如果像我这样的人仍然对后退按钮导航的问题感到恼火，那么我的解决方法现在已经解决了这个问题。但我仍然在测试。如果没有别的办法，试试看

主要的变化是事件，以防WindowFucusChange使用后退按钮顺利工作。缺点是当编辑器聚焦/未聚焦时，事件只被调用一次。这就是使用while循环等待屏幕大小任务的原因。也许没必要

vto.GlobalFocusChange += Vto_WindowFocusChange;

 private AndroidBug5497Workaround(Activity activity)
        {

        var content = (FrameLayout)activity.FindViewById(Android.Resource.Id.Content);
        mChildOfContent = content.GetChildAt(0);
        var vto = mChildOfContent.ViewTreeObserver;
        vto.GlobalFocusChange += Vto_WindowFocusChange;
        frameLayoutParams = (FrameLayout.LayoutParams)mChildOfContent.LayoutParameters;
    }

    private async void Vto_WindowFocusChange(object sender, ViewTreeObserver.GlobalFocusChangeEventArgs e)
    {
        if (e.NewFocus != null && e.OldFocus != null)
        {
                var usableHeightNow = await computeUsableHeight(mChildOfContent.RootView.Height);
                int usableHeightSansKeyboard = mChildOfContent.RootView.Height;
                int heightDifference = usableHeightSansKeyboard - usableHeightNow;
                frameLayoutParams.Height = usableHeightSansKeyboard - heightDifference;
                mChildOfContent.RequestLayout();
                usableHeightPrevious = usableHeightNow;
        }
        else
        {
                frameLayoutParams.Height = mChildOfContent.RootView.Height;
                mChildOfContent.RequestLayout();
                usableHeightPrevious = mChildOfContent.RootView.Height;
        }
    }
    private async Task<int> computeUsableHeight(int previous)
    {
        Rect r = new Rect();
        var w = previous;
        await Task.Run(async() => {

            mChildOfContent.GetWindowVisibleDisplayFrame(r);

            while (r.Bottom == previous)
            {
                await Task.Delay(150);

                if (Build.VERSION.SdkInt < BuildVersionCodes.Lollipop)
                {
                    return (r.Bottom - r.Top);
                }

                mChildOfContent.GetWindowVisibleDisplayFrame(r);

                System.Diagnostics.Debug.WriteLine("Current screen size... " + r.Bottom);
            }
            return r.Bottom;
        });
        return r.Bottom;
    }

vto.GlobalFocusChange+=vto\u WindowFocusChange；
私有AndroidBug5497解决方案（活动）
{
var content=（FrameLayout）activity.findviewbyd（Android.Resource.Id.content）；
mChildOfContent=content.GetChildAt（0）；
var vto=mChildOfContent.ViewTreeObserver；
vto.GlobalFocusChange+=vto_WindowFocusChange；
frameLayoutParams=（FrameLayout.LayoutParams）mChildOfContent.LayoutParameters；
}
私有异步void Vto_WindowFocusChange（对象发送方，ViewTreeObserver.GlobalFocusChangeEventArgs e）
{
if（e.NewFocus！=null&&e.OldFocus！=null）
{
var usableHeightNow=await computeusableheights（mChildOfContent.RootView.Height）；
int usableheightsanskiboard=mChildOfContent.RootView.Height；
int heightDifference=usableHeightSansKeyboard-usableHeightNow；
frameLayoutParams.Height=usableHeightSansKeyboard-heightDifference；
mChildOfContent.RequestLayout（）；
usableHeightPrevious=usableHeightNow；
}
其他的
{
frameLayoutParams.Height=mChildOfContent.RootView.Height；
mChildOfContent.RequestLayout（）；
usableHeightPrevious=mChildOfContent.RootView.Height；
}
}
专用异步任务ComputeUsableLight（int-previous）
{
Rect r=新的Rect（）；
var w=以前的；
等待任务。运行（异步（）=>{
mChildOfContent.GetWindowVisibleDisplayFrame（r）；
while（r.Bottom==上一个）
{
等待任务。延迟（150）；
if（Build.VERSION.SdkInt

活动中是否有在运行时设置窗口软输入模式的代码？此外，如果在某个版面上设置了限制大小调整的特定高度，则您会看到与您现在看到的类似的内容。@Karakuri没有。在android清单中都没有。@Alex.F布局的高度设置为“填充父项”。在这种情况下，我通常会用有问题的布局创建一个新项目，并开始隔离问题，这通常是有效的，因为这大部分是有效的，但有时候，当您按下后退按钮时，Xamarin.Forms似乎不会重新绘制屏幕的底部。键盘下的部分显示为空白。你有这样的问题吗？这似乎只发生在Xamarin.Forms.Hey；从来没用过Xamarin，表格！我们在Xamarin的这一部分之前构建了我们的应用程序。对我们来说似乎没问题。