Android UI開發第二篇——多級列表（ExpandableListView）

 開發中很多地方使用到了多級列表，android可以使用ExpandableListView很好的實現，下面模仿了手機qq的實現，見。

多級列表使用了ExpandableListView，自訂了Adapter；

main.xml

<?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"/></RelativeLayout>

member_listview.xml

<?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

<?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>

ExListView.java

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. */@Overridepublic 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);elseimage.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;}}}

轉自：http://blog.csdn.net/xyz_lmn/article/details/6906268