Xamarin Android 如何在列表视图中更改微调器的高度

Question

我有一个显示在列表视图中的微调器。我需要更改微调器的高度，但无论出于何种原因，微调器的高度都不会改变。基本上我需要将高度增加到列表视图中项目的高度。下面是 Listview 的模板：

    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="horizontal"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:paddingRight="17dp"
        android:paddingLeft="17dp">
        <LinearLayout
            android:orientation="vertical"
            android:minWidth="25px"
            android:minHeight="25px"
            android:layout_width="match_parent"
            android:layout_height="match_parent">
            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/DateTextView"
                android:textSize="24dp"
                android:textColor="#000000" />
            <TextView
                android:layout_width="match_parent"
                android:layout_height="20dp"
                android:id="@+id/DayOfWeekTextView"
                android:ellipsize="end"
                android:textStyle="bold"
                android:textColor="#000000" />
        </LinearLayout>
        <Spinner
            android:id="@+id/spinner"
            android:layout_width="wrap_content"
            android:layout_alignParentRight="true"
            android:drawSelectorOnTop="false"
            android:textSize="40px"
            android:textColor="#FFFFFF"
            android:layout_centerVertical="false"
            android:drawingCacheQuality="high"
            android:layout_height="fill_parent" />
    </RelativeLayout>

这是旋转器电流的显示方式：

这就是我希望它的显示方式

微调器的适配器代码：

    public override Android.Views.View GetView(int position, Android.Views.View convertView, ViewGroup parent)
    {
        var item = statuses[position];
        var view = (convertView ?? activity.LayoutInflater.Inflate(Android.Resource.Layout.SimpleSpinnerItem,
            parent,
            false));
        Android.Graphics.Color customColor = new Android.Graphics.Color();

        view.SetBackgroundColor(Android.Graphics.Color.ParseColor(item.nStatusColor));
        var name = view.FindViewById<TextView>(Android.Resource.Id.Text1);
        //name.SetHeight(50);
        name.Text = item.nStatus;
        return view;
    }

Answer 1

因此，与以编程方式执行此操作相比，我开始考虑布局。然后我意识到设置高度的答案是将一个 RelativeLayout 作为父级添加到 Spinner。然后填充_parent。请看下面的代码！

<RelativeLayout
    android:minWidth="25px"
    android:minHeight="25px"
    android:layout_alignParentRight="true"
    android:layout_width="match_parent"
    android:layout_height="fill_parent">
    <Spinner
        android:id="@+id/spinner"
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true"
        android:drawSelectorOnTop="false"
        android:drawingCacheQuality="high"
        android:textColor="#FFFFFF" />
</RelativeLayout>

Answer 2

如果列表视图中有另一个对象，也可以尝试android:layout_height="fill_parent"，您可以使用alignTop 和alignBottom

Answer 3

您必须创建自己的可绘制 xml 文件并将其设置为 Spinner 的背景属性。我会尽快给你一个例子。

可绘制资源：保存为可绘制目录中的 spinner.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true">
        <shape android:shape="rectangle">
            <corners android:radius="3dip" />
            <stroke android:width="1dip" android:color="#FF327935" />
            <gradient android:angle="-90" android:endColor="#FF6BCA70" android:startColor="#FF327935" />
        </shape>
    </item>
    <item android:state_focused="true">
        <shape android:shape="rectangle">
            <corners android:radius="3dip" />
            <stroke android:width="1dip" android:color="#FFFFFFFF" />
            <gradient android:angle="-90" android:endColor="#FF6BCA70" android:startColor="#FF327935" />
        </shape>
    </item>
    <item android:state_enabled="false">
        <shape android:shape="rectangle">
            <corners android:radius="3dip" />
            <stroke android:width="1dip" android:color="#FF327935" />
            <gradient android:angle="-90" android:endColor="#FFCCCCCC" android:startColor="#FF333333" />
        </shape>
    </item>
    <item android:state_drag_hovered="true">
        <shape android:shape="rectangle">
            <corners android:radius="3dip" />
            <stroke android:width="1dip" android:color="#FFFFFFFF" />
            <gradient android:angle="-90" android:endColor="#FF6BCA70" android:startColor="#FF327935" />
        </shape>
    </item>
    <item>
        <shape android:shape="rectangle">
            <corners android:radius="3dip" />
            <stroke android:width="1dip" android:color="#FFFFFFFF" />
            <gradient android:angle="-90" android:endColor="#FF6BCA70" android:startColor="#FF327935" />
        </shape>
    </item>
</selector>

微调器：

<Spinner
    android:id="@+id/spinnerMonths"
    android:layout_width="200dp"
    android:layout_height="wrap_content"
    android:layout_alignBottom="@+id/imageView4"
    android:layout_alignTop="@+id/imageView4"
    android:layout_toStartOf="@+id/imageView4"
    android:background="@drawable/spinner"
    android:spinnerMode="dialog"
    android:textAlignment="center" />

编辑

试试这个

<?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"
android:orientation="horizontal"
android:paddingLeft="17dp"
android:paddingRight="17dp">

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:minHeight="25px"
    android:minWidth="25px"
    android:orientation="vertical">

    <TextView
        android:id="@+id/DateTextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textColor="#000000"
        android:textSize="24sp" />

    <TextView
        android:id="@+id/DayOfWeekTextView"
        android:layout_width="match_parent"
        android:layout_height="20dp"
        android:ellipsize="end"
        android:textColor="#000000"
        android:textStyle="bold" />


</LinearLayout>

<Spinner
    android:id="@+id/spinner"
    android:layout_width="wrap_content"
    android:layout_height="50dp"
    android:layout_centerVertical="false"
    android:background="@drawable/spinner"
    android:drawSelectorOnTop="false"
    android:drawingCacheQuality="high"
    android:textColor="#FFFFFF"
    android:textSize="20sp" />
</RelativeLayout>

编辑 2

    public override Android.Views.View GetView(int position, Android.Views.View convertView, ViewGroup parent)
    {
        var item = statuses[position];
        var view = (convertView ?? activity.LayoutInflater.Inflate(Android.Resource.Layout.SimpleSpinnerItem,
            parent,
            false));
        Android.Graphics.Color customColor = new Android.Graphics.Color();

        view.SetBackgroundColor(Android.Graphics.Color.ParseColor(item.nStatusColor));
        var name = view.FindViewById<TextView>(Android.Resource.Id.Text1);
        //name.SetHeight(50);

        ViewGroup.LayoutParams mParams = parent.getLayoutParams();
        mParams.height = 50;
        view.setLayoutParams(mParams);

        name.Text = item.nStatus;
        return view;
    }