Xamarin.android 向上打开自动完成下拉菜单

Question

我有一个自动完成下拉菜单，它会打开，不仅与文本字段重叠，而且还位于键盘后面。我需要下拉菜单来说明打开时的文本字段和键盘，而不是向下打开键盘和文本字段。由于建议与文本字段重叠，用户无法看到他们正在输入的内容。下面是我的代码

包含自动完成的布局是 selectionList.xml：

    <LinearLayout xmlns:p1="http://schemas.android.com/apk/res/android"
    p1:orientation="vertical"
    p1:minWidth="25px"
    p1:minHeight="25px"
    p1:layout_width="match_parent"
    p1:layout_height="wrap_content"
    p1:id="@+id/mainLayout">
    <RelativeLayout
        p1:orientation="horizontal"
        p1:minWidth="25px"
        p1:minHeight="25px"
        p1:id="@+id/mainLayout2"
        p1:background="@drawable/border_full_white_black"
        p1:layout_width="match_parent"
        p1:layout_height="52dp"
        p1:layout_marginLeft="5dp"
        p1:layout_marginTop="2dp"
        p1:layout_marginRight="5dp"
        p1:layout_marginBottom="2dp">
        <TextView
            p1:layout_width="100dp"
            p1:layout_height="match_parent"
            p1:id="@+id/label"
            p1:textColor="#47463f"
            p1:gravity="center"
            p1:layout_marginRight="5dp"
            p1:layout_marginLeft="5dp"
            p1:textAppearance="?android:attr/textAppearanceMedium"
            p1:layout_alignParentLeft="true" />
        <TextView xmlns:p2="http://schemas.android.com/tools"
            p1:textAppearance="?android:attr/textAppearanceSmall"
            p1:layout_width="20dp"
            p1:layout_height="wrap_content"
            p1:id="@+id/required_label"
            p1:text="*"
            p1:textColor="#F0b323"
            p1:gravity="center"
            p1:textSize="20dp"
            p1:layout_alignParentRight="true"
            p1:layout_marginRight="5dp" />
        <EditText xmlns:tools="http://schemas.android.com/tools"
            p1:layout_width="match_parent"
            p1:layout_height="match_parent"
            p1:id="@+id/manual_edittext"
            p1:gravity="center"
            p1:textColor="#47463f"
            p1:layout_marginTop="2dp"
            p1:layout_marginRight="5dp"
            p1:layout_marginBottom="5dp"
            p1:background="@drawable/backgroundstyle"
            tools:visibility="invisible"
            p1:layout_toLeftOf="@+id/required_label"
            p1:layout_toEndOf="@+id/user_label" />
        <AutoCompleteTextView
            p1:id="@+id/autoComplete"
            p1:visibility="invisible"
            p1:gravity="center"
            p1:layout_width="match_parent"
            p1:layout_height="wrap_content"
            p1:layout_marginTop="2dp"
            p1:layout_marginRight="2dp"
            p1:layout_marginBottom="5dp"
            p1:singleLine="true"
            p1:imeOptions="actionDone"
            p1:popupBackground="#ffffff"
            p1:maxLength="2"
            p1:dropDownAnchor="@+id/autoComplete"
            p1:dropDownHeight="wrap_content"
            p1:background="@drawable/border_bottom_lightgray_white"
            p1:layout_toLeftOf="@+id/required_label"
            p1:layout_toEndOf="@+id/label" 
            p1:textColor="#47463f"/>
    </RelativeLayout>
</LinearLayout>

自动完成布局资源文件为autocomplete_layout.xml：

<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:p1="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
p1:background="@android:color/white"
p1:layout_width="fill_parent"
p1:layout_height="wrap_content">
 <TextView
    p1:text="Medium Text"
     p1:textAppearance="?android:attr/textAppearanceMedium"
     p1:layout_width="match_parent"
     p1:layout_height="wrap_content"
     p1:id="@+id/textView1"
     p1:textColor="#ff000000"
     p1:gravity="center"
     p1:paddingBottom="8dip"
     p1:paddingTop="8dip"
     p1:background="@drawable/border_bottom_lightgray_white"
     p1:textSize="15dp" />
 </LinearLayout>

设置适配器的代码是：

   var adapter = new ArrayAdapter<String>(this, Resource.Layout.autocomplete_layout, Resource.Id.textView1, list);

目前下拉菜单重叠如下。

Answer 1

根据你的描述和你的代码，我猜你想为 Xamarin.Android 创建自动完成，如果是，你可以看看下面的代码。

首先，创建list_item.xml 并将其保存在 Resources/Layout 文件夹中，将用于建议列表中出现的每个项目。

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dp"
android:textSize="16sp"
android:textColor="#000">
</TextView> 

然后将内容视图设置为 main.xml 布局。

 public class MainActivity : AppCompatActivity
{
    static readonly string[] countries = new String[] {
"Afghanistan","Albania","Algeria","American Samoa","Andorra",   
"Vanuatu","Vatican City","Venezuela","Vietnam","Wallis and Futuna","Western Sahara",
"Yemen","Yugoslavia","Zambia","Zimbabwe"
};
    protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);
        Xamarin.Essentials.Platform.Init(this, savedInstanceState);
        // Set our view from the "main" layout resource
        SetContentView(Resource.Layout.activity_main);

        AutoCompleteTextView textView = FindViewById<AutoCompleteTextView>(Resource.Id.autocomplete_country);
        var adapter = new ArrayAdapter<String>(this, Resource.Layout.list_item, countries);

        textView.Adapter = adapter;
    }
  
}

Main.xaml。

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="5dp">
<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Country" />
<AutoCompleteTextView android:id="@+id/autocomplete_country"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_marginLeft="5dp"/>

更详细的信息，你可以看看：

Auto Complete for Xamarin.Android

截图：