Android:在 ListAdapter 中设置 TextView 的可见性

Question

我有一个包含两个 ListView 的布局(见下图)，它们都是使用两个 SimpleAdapter 创建的；让我们将顶部的 ListView 称为 QLocations ListView，将底部的 ListView 称为 AllLocations ListView。

我想从我的 AllLocations ListView 中隐藏所有红色 TextView 元素。我不知道如何将 TextView 仅与 AllLocations ListView 隔离，而不是与 QLocations ListView 隔离。

所以，我的问题是，如何隐藏特定 ListView 中的所有 TextView 元素？

这是我的代码:

创建 ListView

    // Getting qListView: List View for locations with Qs
    qLV = (ListView) activity.findViewById(R.id.qListView);

    // list adapter
    ListAdapter qAdapter = new SimpleAdapter(activity, qListItems,
            R.layout.google_places_item,
            new String[] { KEY_REFERENCE, KEY_NAME}, new int[] {
                    R.id.reference, R.id.name });

    // Adding data into listview
    qLV.setAdapter(qAdapter);

    // Getting allListView: List View for locations without Qs
    allLV = (ListView) activity.findViewById(R.id.allListView);

    // list adapter
    ListAdapter allAdapter = new SimpleAdapter(activity, placesListItems,
            R.layout.google_places_item,
            new String[] { KEY_REFERENCE, KEY_NAME}, new int[] {
                    R.id.reference, R.id.name });

    // Adding data into listview
    allLV.setAdapter(allAdapter);

google_places_item.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView android:id="@+id/reference"
        android:visibility="gone"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"/>

    <!-- Row for each location -->
    <LinearLayout 
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/qLocationRow"
        android:orientation="horizontal"
        >

    <!-- Q Name -->
    <TextView android:id="@+id/name"
        style="@style/qName"
    />

    <!-- Q WaitTime -->
    <TextView android:id="@+id/qName.qWaitTime"
        style="@style/qName.qWaitTime"
        android:text="14"
        />

    </LinearLayout>
</LinearLayout>

Activity 布局

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     style="@style/fullWidth"> 

    <!--  Label for List View of QLocations -->

    <TextView
        android:id="@+id/qListLabel"
        style="@style/widthMargins.Label"
        android:text="@string/qListLabel" />

    <!-- Horizontal Rule -->

    <View
        android:id="@+id/horizontalRule1"
        style="@style/widthMargins.horizontalRule"
        android:layout_below="@+id/qListLabel"
         />

    <!-- Linear Layout containing progress bar + text description -->
    <LinearLayout
        android:layout_width="200dp"
        android:layout_height="60dp"
        android:id="@+id/lin_progressBar"
        android:visibility="visible"
        android:layout_centerHorizontal="true"
        android:layout_below="@id/horizontalRule1"
        android:layout_marginTop="10dp"
        android:orientation="horizontal">

        <ProgressBar
            android:id="@+id/loadPlacesProgress"
            style="?android:attr/progressBarStyleLarge"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            />
        <TextView 
            android:id="@+id/loadPlacesText"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_marginLeft="5dp"
            android:text="Loading..."       
            android:gravity="center_vertical"
            android:textSize="15sp"    
            />

        </LinearLayout>

    <!-- ListView for Q Locations -->    
        <ListView
            android:id="@+id/qListView"
            style="@style/widthMargins"
            android:layout_height="140dp"
            android:layout_below="@+id/horizontalRule1" />


    <!--  Label for List View of All Locations -->

    <TextView
        android:id="@+id/allListLabel"
        style="@style/widthMargins.Label"
        android:layout_below="@+id/qListView"
        android:text="@string/allListLabel" />

    <!-- Horizontal Rule -->

    <View
        android:id="@+id/horizontalRule2"
        style="@style/widthMargins.horizontalRule"
        android:layout_below="@+id/allListLabel"
         />

        <!-- Linear Layout containing progress bar + text description -->
        <LinearLayout
            android:layout_width="200dp"
            android:layout_height="60dp"
            android:id="@+id/lin_progressBar2"
            android:visibility="visible"
            android:layout_centerHorizontal="true"
            android:layout_below="@id/horizontalRule2"
            android:layout_marginTop="10dp"
            android:orientation="horizontal">

        <ProgressBar
            android:id="@+id/loadPlacesProgress2"
            style="?android:attr/progressBarStyleLarge"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            />
        <TextView 
            android:id="@+id/loadPlacesText2"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_marginLeft="5dp"
            android:text="Loading..."       
            android:gravity="center_vertical"
            android:textSize="15sp"    
            />

        </LinearLayout>

    <!-- ListView for All Locations -->    

        <ListView
            android:id="@+id/allListView"
            style="@style/widthMargins"
            android:layout_height="140dp"
            android:layout_below="@+id/horizontalRule2"
            />

    <!-- Show on Map button -->
    <Button android:id="@+id/btn_show_map"
        style="@style/fullWidth"
        android:layout_centerHorizontal="true"
        android:text="Map"
        android:padding="20dp"
        android:layout_alignParentBottom="true"
        android:layout_marginTop="10dip"/>

</RelativeLayout>

Answer 1

因此，在您设置适配器后，您应该能够运行下面的代码以产生所需的效果。我不确定它的效率如何，但它至少应该能完成工作。

    int numChildren = allLV.getListView().getChildCount();
    for(int i = 0; i < numChildren; i++)
    {
        LinearLayout ll = (LinearLayout) allLV.getListView().getChildAt(i);
        TextView tv = (TextView) ll.findViewById(R.id.qName.qWaitTime);
        tv.setVisibility(View.INVISIBLE);
    }

然后当你想显示红框文字时，使用类似的方法将它们重新设置为可见。