ExpandableListView安卓开发可扩展的listview

来源：互联网发布：2017优化设计英语答案编辑：程序博客网时间：2024/04/30 21:51

//安卓开发：ExpandableListView的用法：

public class ExListView extends Activity {
private static final String G_TEXT = "g_text";

private static final String C_TEXT1 = "c_text1";
private static final String C_TEXT2 = "c_text1";

List<Map<String, String>> groupData = new ArrayList<Map<String, String>>();
List<List<Map<String, String>>> childData = new ArrayList<List<Map<String, String>>>();

ExAdapter adapter;
ExpandableListView exList;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

for (int i = 0; i < 5; i++) {
Map<String, String> curGroupMap = new HashMap<String, String>();
groupData.add(curGroupMap);
curGroupMap.put(G_TEXT, "Group " + i);

List<Map<String, String>> children = new ArrayList<Map<String, String>>();
for (int j = 0; j < 5; j++) {
Map<String, String> curChildMap = new HashMap<String, String>();
children.add(curChildMap);
curChildMap.put(C_TEXT1, "Child " + j);
curChildMap.put(C_TEXT2, "Child " + j);
}
childData.add(children);
}

adapter=new ExAdapter(ExListView.this);
exList = (ExpandableListView) findViewById(R.id.list);
exList.setAdapter(adapter);
exList.setGroupIndicator(null);
exList.setDivider(null);
}

class ExAdapter extends BaseExpandableListAdapter {
ExListView exlistview;

public ExAdapter(ExListView elv) {
super();
exlistview = elv;
}
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {

View view = convertView;
if (view == null) {
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.member_listview, null);
}

TextView title = (TextView) view.findViewById(R.id.content_001);
title.setText(getGroup(groupPosition).toString());

ImageView image=(ImageView) view.findViewById(R.id.tubiao);
if(isExpanded)
image.setBackgroundResource(R.drawable.btn_browser2);
else image.setBackgroundResource(R.drawable.btn_browser);

return view;
}

public long getGroupId(int groupPosition) {
return groupPosition;
}

public Object getGroup(int groupPosition) {
return groupData.get(groupPosition).get(G_TEXT).toString();
}

public int getGroupCount() {
return groupData.size();

}
//**************************************
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
View view = convertView;
if (view == null) {
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.member_childitem, null);
}
final TextView title = (TextView) view.findViewById(R.id.child_text);
title.setText(childData.get(groupPosition).get(childPosition).get(C_TEXT1).toString());
final TextView title2 = (TextView) view.findViewById(R.id.child_text2);
title2.setText(childData.get(groupPosition).get(childPosition).get(C_TEXT2).toString());

return view;
}

public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}

public Object getChild(int groupPosition, int childPosition) {
return childData.get(groupPosition).get(childPosition).get(C_TEXT1).toString();
}

public int getChildrenCount(int groupPosition) {
return childData.get(groupPosition).size();
}
//**************************************
public boolean hasStableIds() {
return true;
}

public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}

}

}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent" android:background="@drawable/default_bg">

<ExpandableListView android:id="@+id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentLeft="true"
android:cacheColorHint="#00000000"
/>

</RelativeLayout>

//member_listview.xml布局文件的代码如下：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="40dip"
android:layout_gravity="center_horizontal">

<LinearLayout android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="40dip"
android:id="@+id/layout_013">
<ImageView android:id="@+id/ImageView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:paddingTop="10dip"
android:src="@drawable/user_group"></ImageView>
<RelativeLayout android:id="@+id/layout_013"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView android:id="@+id/content_001"
android:textSize="26px"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:textColor="#FFFFFF"
android:gravity="center_vertical"
android:paddingLeft="10px"
android:layout_gravity="center_vertical"></TextView>
<ImageView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tubiao"
android:layout_alignParentRight="true"></ImageView>
</RelativeLayout>
</LinearLayout>


</LinearLayout>

//member_childitem.xml布局文件的代码如下：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/childlayout"
android:orientation="horizontal">
<ImageView android:id="@+id/child_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/child_image"
android:paddingTop="10dip"
android:layout_marginLeft="40dip"></ImageView>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView android:text=""
android:id="@+id/child_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:textSize="16dip"
android:layout_gravity="center_vertical"></TextView>
<TextView android:text=""
android:id="@+id/child_text2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="12dip"
android:gravity="center_vertical"
android:layout_gravity="center_vertical"></TextView>
</LinearLayout>
</LinearLayout>

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