先看效果~

也就是BaseExpandableListAdapter、AbsListView類的使用，就不多說了..大牛留情...

就兩個類。

ExpandLabel:

package com.yfz; import java.util.ArrayList; import java.util.List; import android.app.Activity; import android.os.Bundle; import android.view.ViewGroup.LayoutParams; import android.widget.ExpandableListView; import android.widget.ViewFlipper; public class ExpandLabel extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // 數據源 //標題 List<String> groupArray = new ArrayList<String>(); //子標題 List<List<String>> childArray = new ArrayList<List<String>>(); groupArray.add("第一章"); groupArray.add("第二章"); List<String> tempArray01 = new ArrayList<String>(); tempArray01.add("第1.1節"); tempArray01.add("第1.2節"); tempArray01.add("第1.3節"); List<String> tempArray02 = new ArrayList<String>(); tempArray02.add("第2.1節"); tempArray02.add("第2.2節"); tempArray02.add("第2.3節"); childArray.add(tempArray01); childArray.add(tempArray02); ExpandableListView expandableListView = new ExpandableListView(this); ExpandableAdapter adapter = new ExpandableAdapter(this,groupArray,childArray); expandableListView.setAdapter(adapter); addContentView(expandableListView, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT)); } }

樹形菜單類，只要傳兩個List過來就可以直接使用了。

groupArray：表示一級菜單

childArray： 表示二級菜單

二級菜單相當于一個二維List，該List中存儲的每個元素都是一個List。第一個元素對應一級菜單中第一個菜單的子項List，第二個元素對應一級菜單中第二個菜單的子項List，依次類推。

ExpandableAdapter：

package com.yfz; import java.util.ArrayList; import java.util.List; import android.app.Activity; import android.view.Gravity; import android.view.View; import android.view.ViewGroup; import android.widget.AbsListView; import android.widget.BaseExpandableListAdapter; import android.widget.TextView; public class ExpandableAdapter extends BaseExpandableListAdapter { private List<String> groupArray; private List<List<String>> childArray; private Activity activity; public ExpandableAdapter(Activity a,List<String> groupArray,List<List<String>> childArray) { activity = a; this.groupArray = groupArray; this.childArray = childArray; } @Override public Object getChild(int groupPosition, int childPosition) { // TODO Auto-generated method stub return childArray.get(groupPosition).get(childPosition); } @Override public long getChildId(int groupPosition, int childPosition) { // TODO Auto-generated method stub return childPosition; } @Override public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { // TODO Auto-generated method stub String string = childArray.get(groupPosition).get(childPosition); return getGenericView(string); } @Override public int getChildrenCount(int groupPosition) { // TODO Auto-generated method stub return childArray.get(groupPosition).size(); } @Override public Object getGroup(int groupPosition) { // TODO Auto-generated method stub return groupArray.get(groupPosition); } @Override public int getGroupCount() { // TODO Auto-generated method stub return groupArray.size(); } @Override public long getGroupId(int groupPosition) { // TODO Auto-generated method stub return groupPosition; } @Override public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { // TODO Auto-generated method stub String string = groupArray.get(groupPosition); return getGenericView(string); } @Override public boolean hasStableIds() { // TODO Auto-generated method stub return false; } @Override public boolean isChildSelectable(int groupPosition, int childPosition) { // TODO Auto-generated method stub return false; } /****************************************以下為自定義方法*********************************************/ /** * Children 's View * @param string * @return */ public TextView getGenericView(String string) { AbsListView.LayoutParams layoutParams = new AbsListView.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, 64); TextView text = new TextView(activity); text.setLayoutParams(layoutParams); // Center the text vertically text.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT); // Set the text starting position text.setPadding(36, 0, 0, 0); text.setText(string); return text; } }

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ExpandableListView的OnChildClickListener無效？ExpandableListView子元素無法點擊？

不知道大家有沒有發現，上面這樣做之后， Child項時無法被點擊的。 因此也會造成OnChildClickListener注冊后無效。 即不管你怎么點擊Child項，onChildClick始終不會被調用， 原因是什么呢?

很簡單，是自定義adapter中的isChildSelectable 方法造成。 這個方法標識子元素能否被點擊。 返回false就無法被點擊，要返回true才行。

【Android】樹形菜單、擴展下拉菜單BaseExpandableListAdapter、AbsListView