Question

我正在尝试合并2个列表＆＃34;部分＆＃34;通过高度权重进入LinearLayout。我遇到的问题是，虽然是＆＃34;部分＆＃34;的容器。显示正确的高度（背景为sub_gray），并且适配器计数正确，我的实际列表行的高度为0，这使我的列表看起来不可见。

列出项目

以下是我的列表行/项直接使用的代码。 To avoid the wall of code getting too long, I will include my code for one of the lists seeing as they are both behaving the same.

layout_quick_guide_checklist_item

<?xml version="1.0" encoding="utf-8"?>
<com.my_project.project.QuickGuideChecklistListItemView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:minHeight="50dp"
    android:background="@color/sub_gray"
    android:orientation="horizontal" >

    <CheckBox
        android:id="@+id/checkbox_checklist"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="5dp"
        android:layout_gravity="center"
        android:checked="true"
        android:clickable="false" />

    <TextView
        android:id="@+id/text_field"
        style="@style/default_text_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="5dp"
        android:text="@string/height_wrap_string"/>

</com.my_project.project.QuickGuideChecklistListItemView>

QuickGuideChecklistListItemView

public class QuickGuideChecklistListItemView extends LinearLayout{

    private TextView listText;

    public QuickGuideChecklistListItemView(Context context) {
        super(context);
    }

    public QuickGuideChecklistListItemView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public QuickGuideChecklistListItemView(Context context, AttributeSet attrs,
            int defStyle) {
        super(context, attrs, defStyle);
    }

    public static QuickGuideChecklistListItemView inflate(ViewGroup parent) {
        LayoutInflater inflater = (LayoutInflater) parent.getContext().
                getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        QuickGuideChecklistListItemView itemView = (QuickGuideChecklistListItemView) 
                inflater.inflate(R.layout.layout_quick_guide_checklist_item, parent, false);

        return itemView;
    }

    @Override
    public void onFinishInflate(){
        super.onFinishInflate();        
        listText = (TextView) findViewById(R.id.text_field);
    }

    public void setText(String text){
        listText.setText(text);
    }
}

完整列表

现在我使用上面的代码并在我的活动中使用它来创建一个列表（回想一下;我的活动中实际上有两个列表，构造方式相似，并且都导致行高为0）。

QuickGuideDetailActivity

public class QuickGuideDetailActivity extends NavigationDrawerActivity implements OnClickListener{

    private final String TAG = getClass().getSimpleName();

    private QuickGuideModel selectedQuickGuide;
    private QuickGuideChecklistAdapter checklistAdapter;
    private QuickGuideTipAdapter tipsAdapter;
    private TextView quickGuidesTitle, quickGuidesDescription, inflaterButton;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        selectedQuickGuide = QuickGuidesActivity.selectedQuickGuide;    
        buildLists();
    }

    @Override
    protected int getLayoutId(){
        return R.layout.sub_activity_quick_guide;
    }

    public void checkAdapterSize(View v){
        String checklistString = (checklistAdapter == null)? "null": "" + checklistAdapter.getCount();
        String tipString = (tipsAdapter == null)? "null": "" + tipsAdapter.getCount();
        Toast.makeText(this, checklistString + " : " + tipString,
            Toast.LENGTH_SHORT).show();
    }

    private void buildLists(){
        TextView checklistTitle = (TextView) findViewById(R.id.checklist_title_bar);
        checklistTitle.setText(getResources().getString(R.string.title_checklist));

        ArrayList<String> checklistStrings = new ArrayList<String>();
        for(Object guide : selectedQuickGuide.checklist){
            checklistStrings.add((String) guide.toString());
        }
        checklistAdapter = new QuickGuideChecklistAdapter(checklistStrings);
        ListView checklist = (ListView) findViewById(R.id.checklist_list);
        checklist.setAdapter(checklistAdapter);
        Log.d(TAG, "List Size - Checklist = " + selectedQuickGuide.checklist.length);


        TextView tipsTitle = (TextView) findViewById(R.id.tips_title_bar);
        tipsTitle.setText(getResources().getString(R.string.title_tips));

        tipsAdapter = new QuickGuideTipAdapter(selectedQuickGuide.topTips);
        ListView tips = (ListView) findViewById(R.id.tips_list);
        tips.setAdapter(tipsAdapter);
        Log.d(TAG, "List Size - Tips = " + selectedQuickGuide.topTips.length);

    }
}

sub_activity_quick_guide

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/nav_drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <LinearLayout
        style="@style/default_container"
        android:layout_margin="15dp"
        android:orientation="vertical" >

        <include
            android:id="@+id/expandable_section"
            layout="@layout/section_expandable_details" />

        <LinearLayout
            style="@style/default_container" 
            android:orientation="vertical" 
            android:weightSum="2">
            <LinearLayout
                android:id="@+id/checklist_section"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_weight="1"
                android:layout_marginBottom="8dp"
                android:background="@color/sub_gray" 
                android:onClick="checkAdapterSize" >

                <View
                    android:layout_width="1dp"
                    android:layout_height="15dp" />

                <TextView 
                    android:id="@+id/checklist_title_bar"
                    style="@style/default_label_text_view"
                    android:background="@color/random_blue" 
                    android:text="@string/loading" />

                <ListView
                    android:id="@+id/checklist_list"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent" 
                    android:divider="@color/off_white"
                    android:dividerHeight="1dp" />

            </LinearLayout>

            <LinearLayout
                android:id="@+id/tips_list_section"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_weight="1"
                android:layout_marginTop="7dp"
                android:background="@color/sub_gray" 
                android:onClick="checkAdapterSize" >

                <View
                    android:layout_width="1dp"
                    android:layout_height="15dp" />

                <TextView 
                    android:id="@+id/tips_title_bar"
                    style="@style/default_label_text_view"
                    android:background="@color/random_blue" 
                    android:text="@string/loading" />

                <ListView
                    android:id="@+id/tips_list"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent" 
                    android:divider="@color/off_white"
                    android:dividerHeight="1dp" />
            </LinearLayout>
        </LinearLayout>
    </LinearLayout>


    <RelativeLayout
        android:id="@+id/main_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <ListView
        android:id="@+id/nav_drawer_list_view"
        android:layout_width="@dimen/drawer_width"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:background="@android:color/white" />

</android.support.v4.widget.DrawerLayout>

QuickGuideChecklistAdapter

public class QuickGuideChecklistAdapter extends BaseAdapter{

    private ArrayList<String> guides;
    private List<Boolean> checklistItemTicked = new ArrayList<Boolean>();

    public QuickGuideChecklistAdapter(ArrayList<String> guides){
        this.guides = guides;
        for(int i = 0; i < guides.size(); i++)
            checklistItemTicked.add(false);
    }

    @Override
    public int getCount() {
        return guides.size();
    }

    @Override
    public String getItem(int position) {
        if(position < 0 || position >= guides.size())
            throw new IndexOutOfBoundsException("Position is out of range of list with size " + guides.size());
        return guides.get(position);
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        QuickGuideChecklistListItemView itemView = (QuickGuideChecklistListItemView)convertView;
        if (null == itemView)
            itemView = QuickGuideChecklistListItemView.inflate(parent);

        itemView.setText(guides.get(position));
        Log.d(getClass().getSimpleName(), "Setting text to " + guides.get(position) + " in position " + position);

        return itemView;
    }
}

对于代码墙感到抱歉，但我已经尝试过调整所有内容，但似乎无法正常工作。所以最后一点：

设置适配器，getCount（）返回列表中有效的项目数，然后单击布局以调用checkAdapterSize（）也会生成具有正确值的Toast。
< / LI>
第一个视图是＆＃34;膨胀＆＃34;但结果是视图高度为0.
我的列表＆＃34;部分＆＃34;的容器布局（例如sub_activity_quick_guide中的checklist_section）具有sub_gray背景可以看到的高度。

我尝试将高度属性从match_parent更改为wrap_content，反之亦然，没有运气。我已经尝试为我的列表项和所有好东西明确声明minHeight。我似乎无法获得列表行项目来实际膨胀。

Screenshot

Answer 1

有趣的是，在经过几天的尝试后，我总是设法找出自己问题的答案：P

无论如何，the issue was in placing my ListViews inside of LinearLayouts with heights determined by weight.我删除了我的“部分”的LinearLayout包装器，并将权重直接应用到我的ListViews，瞧...好的去。

新的完整工作活动布局

sub_activity_quick_guide

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/nav_drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <LinearLayout
        style="@style/default_container"
        android:layout_margin="15dp"
        android:orientation="vertical"
        android:weightSum="2" >

        <include
            android:id="@+id/expandable_section"
            layout="@layout/section_expandable_details" />

        <View
            android:layout_width="1dp"
            android:layout_height="15dp" />

        <TextView
            android:id="@+id/checklist_title_bar"
            style="@style/default_label_text_view"
            android:background="@color/random_blue"
            android:text="@string/loading" />

        <ListView
            android:id="@+id/checklist_list"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1"
            android:divider="@color/off_white"
            android:dividerHeight="1dp" />

        <View
            android:layout_width="1dp"
            android:layout_height="15dp" />

        <TextView
            android:id="@+id/tips_title_bar"
            style="@style/default_label_text_view"
            android:background="@color/random_blue"
            android:text="@string/loading" />

        <ListView
            android:id="@+id/tips_list"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1"
            android:divider="@color/off_white"
            android:dividerHeight="1dp" />
    </LinearLayout>

    <RelativeLayout
        android:id="@+id/main_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <ListView
        android:id="@+id/nav_drawer_list_view"
        android:layout_width="@dimen/drawer_width"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:background="@android:color/white" />

</android.support.v4.widget.DrawerLayout>

希望它能帮助将来的某个人，没有意识到权重会像那样惹恼它，但显然ListViews不喜欢加权容器。

ListView项目不会膨胀以按预期包装内容，高度== 0但不应该没有

1 个答案: