Android开发实现ListView点击展开收起效果示例

<?xml version="1.0" encoding="utf-8"?><LinearLayout  xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:tools="http://schemas.android.com/tools"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:orientation="vertical"  tools:context=".MainActivity" >  <!--提示框-->  <TextView    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:text="请选择您的类型："    android:textSize="30sp"    android:textColor="#ffffffff"    android:paddingLeft="5dp"    android:paddingTop="5dp"    android:paddingBottom="5dp"    android:background="#ff000000"/>  <!--定义一个ExpandableListView组件-->  <ExpandableListView    android:id="@+id/list"    android:layout_width="match_parent"    android:layout_height="match_parent">  </ExpandableListView></LinearLayout>

public class MainActivity extends Activity {  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    //创建一个ExpandableListAdapter对象    final ExpandableListAdapter adapter = new ExpandableListAdapter() {      int[] logos = new int[]{          R.drawable.human1st,          R.drawable.human1st,          R.drawable.human2nd,          R.drawable.human3rd      };      private String[] humanTypes = new String[]{          "不是人","聪明人","普通人","我这样的人"      };      private String[][] humans = new String[][]{          {"上仙","大神","荷兰猪"},          {"超人","一般聪明人","假的聪明人"},          {"努力的人","快乐的普通人","苦逼的普通人"},          {"天才","傻逼","蠢萌"}      };      //获得制定组的位置、指定子列表项处的字列表项数据      private TextView getTextView(){        AbsListView.LayoutParams layoutParams =            new AbsListView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,164);        TextView textView = new TextView(MainActivity.this);        textView.setLayoutParams(layoutParams);        textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);        textView.setPadding(36,0,0,0);        textView.setTextSize(30);        return textView;      }      @Override      public void registerDataSetObserver(DataSetObserver observer) {      }      @Override      public void unregisterDataSetObserver(DataSetObserver observer) {      }      @Override      public int getGroupCount() {        return humanTypes.length;      }      @Override      public int getChildrenCount(int groupPosition) {        return humans[groupPosition].length;      }      //获取制定组位置处的组数据      @Override      public Object getGroup(int groupPosition) {        return humanTypes[groupPosition];      }      @Override      public Object getChild(int groupPosition, int childPosition) {        return humans[groupPosition][childPosition];      }      @Override      public long getGroupId(int groupPosition) {        return groupPosition;      }      @Override      public long getChildId(int groupPosition, int childPosition) {        return childPosition;      }      @Override      public boolean hasStableIds() {        return true;      }      //该方法决定每个组选项的外观      @Override      public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {        LinearLayout linearLayout = new LinearLayout(MainActivity.this);        linearLayout.setOrientation(LinearLayout.HORIZONTAL);        ImageView logo = new ImageView(MainActivity.this);        logo.setImageResource(logos[groupPosition]);        linearLayout.addView(logo);        TextView textView = getTextView();        textView.setText(getGroup(groupPosition).toString());        linearLayout.addView(textView);//        linearLayout.setMinimumHeight(50);        return linearLayout;      }      @Override      public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {        TextView textView = getTextView();        textView.setText(getChild(groupPosition,childPosition).toString());        return textView;      }      @Override      public boolean isChildSelectable(int groupPosition, int childPosition) {        return true;      }      @Override      public boolean areAllItemsEnabled() {        return false;      }      @Override      public boolean isEmpty() {        return false;      }      @Override      public void onGroupExpanded(int groupPosition) {      }      @Override      public void onGroupCollapsed(int groupPosition) {      }      @Override      public long getCombinedChildId(long groupId, long childId) {        return 0;      }      @Override      public long getCombinedGroupId(long groupId) {        return 0;      }    };    ExpandableListView expandableListView = (ExpandableListView) findViewById(R.id.list);    expandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {      @Override      public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {        Toast.makeText(MainActivity.this,"你是一个：" +            adapter.getChild(groupPosition,childPosition),Toast.LENGTH_SHORT).show();        return true;      }    });    expandableListView.setAdapter(adapter);  }}