Question

我是android新手，我现在正尝试使用ExpandableListView首先列出组级别的工作类型，然后在子级别中列出工作项目。但是布局fill_parent在getChildView方法中不起作用很奇怪，它就像wrap_content一样，当我记录它们在布局中设置的时候，相关的textviews的高度也变为0，因此除非我手动设置文本大小，否则所有textview看起来都不见了在代码中。最奇怪的是只有子视图有问题，组级别工作正常，我不需要设置任何文本大小或高度。

下面是一些代码，请你帮我找出问题所在？非常感谢你!!

活动

public class WorkListActivity extends Activity implements
    ExpandableListView.OnGroupClickListener {
private ExpandableListView elv;
List<WorkTypeBean> worktypes = null;
ExpandableAdapter viewAdapter;
WorkTypeBean worktypeBean = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.work_items);
    elv = (ExpandableListView) findViewById(R.id.workList_ev);
    elv.setOnGroupClickListener(this);
    getWorkTypes();  //get all work types user can visit from server
}
@Override
public boolean onGroupClick(ExpandableListView parent, View v,
        int groupPosition, long id) {
    if (!parent.isGroupExpanded(groupPosition)){
        getWorkItems(groupPosition);  
        //fetch work items from server only when specific group clicked
    }
    return false;
}
class ExpandableAdapter extends BaseExpandableListAdapter {
    @Override
    public View getChildView(int groupPosition, int childPosition,
            boolean isLastChild, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView==null){
            LayoutInflater layoutInflater = (LayoutInflater) getBaseContext()
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = layoutInflater.inflate(
                    R.layout.work_items_c, null);
            holder = new ViewHolder();
            holder.tv1 = (TextView) convertView.findViewById(R.id.tv_work_item_title);
            holder.tv2 = (TextView) convertView.findViewById(R.id.tv_work_item_applier);
            holder.iv1 = (ImageView) convertView.findViewById(R.id.iv_work_item_hl);
            convertView.setTag(holder);
        }else{
            holder = (ViewHolder)convertView.getTag();
        }
        convertView.setBackgroundColor(Color.WHITE);
        WorkTypeBean typeBean = worktypes.get(groupPosition);
        if (typeBean==null){
            return convertView;
        }
        WorkItemBean workitem = typeBean.getItem(childPosition);
        if (workitem==null){
            return convertView;
        }
        String title = workitem.getTitle();
        String applier = workitem.getApplier();
        String postdate = workitem.getArriveTime();
        int waitdays = Integer.parseInt(workitem.getWaitDays());
        holder.tv1.setTextColor(Color.BLACK);
        holder.tv1.setText(title);
        holder.tv1.setTextSize(15);
        holder.tv2.setTextColor(Color.BLACK);
        holder.tv2.setTextSize(10);
        //if not set, tv2 remains original text "loading..." from work_item_c.xml
        holder.tv2.setText(applier+" ("+postdate+")");
        if (waitdays > 2){
            holder.iv1.setImageResource(R.drawable.wl_urgent);
        }else{
            holder.iv1.setImageResource(R.drawable.wl_normal);
        }
        return convertView;
    }
    @Override
    public View getGroupView(int groupPosition, boolean isExpanded,
            View convertView, ViewGroup parent) {
        ViewHolder holder;
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) getBaseContext()
.getSystemService(LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.work_items_h, null);
            holder = new ViewHolder();
            holder.tv1 = (TextView) convertView.findViewById(R.id.tv_worktype);
            holder.iv1 = (ImageView) convertView.findViewById(R.id.iv_worktype_counter);
            convertView.setTag(holder);
        }else{
            holder = (ViewHolder)convertView.getTag();
}
        WorkTypeBean worktype = worktypes.get(groupPosition);
        if (worktype==null){
            return convertView;
        }
        holder.tv1.setTextColor(Color.BLACK);
        holder.tv1.setText(worktype.getTitle());
        return convertView;    
    }
    //... some other code 
    }
    }

组级布局：work_items_h.xml //正常工作

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

<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="match_parent" >

    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="match_parent" >

        <TextView
            android:id="@+id/tv_worktype"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_alignParentTop="true"
            android:layout_marginLeft="50dp"
            android:textAppearance="?android:attr/textAppearanceLarge" />

        <ImageView
            android:id="@+id/iv_worktype_counter"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_alignParentTop="true" />

    </RelativeLayout>

</LinearLayout>
     </LinearLayout>

子级别布局：work_items_c.xml // fill_parent不起作用，文本视图高度

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

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >

        <ImageView
            android:id="@+id/iv_work_item_hl"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/wl_normal" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical" >

            <TextView
                android:id="@+id/tv_work_item_title"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:text="loading..."
                android:textSize="15dp" />
            <!--tried android:layout_height="fill_parent" but not work-->

            <TextView
                android:id="@+id/tv_work_item_applier"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:gravity="right"
                android:text="loading..."
                android:textAppearance="?android:attr/textAppearanceSmall"
                android:textSize="10dp" />

        </LinearLayout>

    </LinearLayout>

Answer 1

只是覆盖其他人的布局，现在它是正确的。这是我的新布局：

work_item_h.xml

    <TextView
        android:id="@+id/tv_worktype"
        android:layout_width="259dp"
        android:layout_height="wrap_content"
        android:layout_gravity="left|center"
        android:paddingBottom="10px"
        android:paddingLeft="40px"
        android:paddingTop="10px"
        android:textColor="#ff0000"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textSize="20.0px" />

    <ImageView
        android:id="@+id/iv_worktype_counter"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="right|center"
        android:src="@drawable/counter" />

</LinearLayout>

work_item_c.xml

<ImageView
    android:id="@+id/iv_work_item_hl"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal"
    android:layout_marginBottom="2.0px"
    android:layout_marginLeft="10.0px"
    android:layout_marginTop="10.0px"
    android:paddingTop="6.0px" />

<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_marginBottom="2.0px"
    android:baselineAligned="@+id/iv_work_item_hl"
    android:orientation="vertical"
    android:paddingTop="2.0px" >

    <TextView
        android:id="@+id/tv_work_item_title"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="left|center"
        android:layout_marginLeft="10.0px"
        android:textColor="#ff000000"
        android:textSize="20.0px" />

    <TextView
        android:id="@+id/tv_work_item_applier"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="left|center"
        android:layout_marginLeft="10.0px"
        android:textColor="#ff838383"
        android:textSize="13.0px" />
</LinearLayout>

但是我仍然不知道我以前的布局有什么问题，它在我的eclipse布局设计器中正确显示。无论如何，我很高兴看到它终于奏效了。谢谢任何人......，似乎没有人关心我的问题，然后感谢自己，感谢上帝：）

此致杰夫

expandablelistview getchildview显示不正确

1 个答案: