我正在使用扩展的MyExpandableListAdapter BaseExpandableListAdapter和我在我的适配器中实现了BaseExpandableListAdapter的所有方法，我创建了扩展ExpandableListActivity的MyExpadableListActivity。 MyExpandableListAdapter是MyExpadableListActivity的内部类。 我使用xml视图添加子项和分组UI（过去在下面）。 当我运行应用程序时它的显示很好。 我的问题是，我在MyExpadableListActivity中覆盖了ExpandableListActivity的onChildClick（....）方法。当我运行我的代码时，它不能用于onChildClick方法。 我如何使用这种情况或其他建议实现onChildClick（...）方法.. 希望有人指出我做错了什么...... 如果有人指出我如何能够实现解决方案，请感激不尽。 。
public class MyExpadableListActivity extends ExpandableListActivity implements
ExpandableListView.OnChildClickListener {
ExpandableListAdapter mAdapter;
Context mContext;
static final String groups[] = { "Chats", "Contacts (289)",
"Group Chat (7)", "e-Card (137)", "Pending (37)",
"Bookmarks" };
static final String children[][] = {
{ "ListofChats" },
{ "Group", "groupt01", "groupt02", "groupt03" },
{ "Groupd 01", "", "Group 02", "", "Group 03", "" },
{ "E-Card-01", "", "E-Card-02", "",
"Business Card Received", "" },
{ " Req", "", " Req", "", " Req", "" } };
private static final String TAG = "Hookup";
XMPPConnection connection = SignInMainActivity.connection;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mAdapter = new MyExpandableListAdapter(this);
setListAdapter(mAdapter);
registerForContextMenu(getExpandableListView());
}
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
// TODO Auto-generated method stub
System.out.println("Insidded onContextItemSelected");
return super.onChildClick(parent, v, groupPosition, childPosition, id);
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
menu.setHeaderTitle("Hookup Menu");
menu.add(0, 0, 0, R.string.hello);
}
public boolean onContextItemSelected(MenuItem item) {
System.out.println("Insidded onContextItemSelected");
Log.i(TAG, "onContextItemSelected");
ExpandableListContextMenuInfo info = (ExpandableListContextMenuInfo) item
.getMenuInfo();
String title = ((TextView) info.targetView).getText().toString();
int type = ExpandableListView
.getPackedPositionType(info.packedPosition);
if (type == ExpandableListView.PACKED_POSITION_TYPE_CHILD) {
int groupPos = ExpandableListView
.getPackedPositionGroup(info.packedPosition);
int childPos = ExpandableListView
.getPackedPositionChild(info.packedPosition);
Toast.makeText(this,title + ": Child " + childPos + " clicked in group " + groupPos, Toast.LENGTH_SHORT).show();
return true;
} else if (type == ExpandableListView.PACKED_POSITION_TYPE_GROUP) {
int groupPos = ExpandableListView
.getPackedPositionGroup(info.packedPosition);
Toast.makeText(this, title + ": Group " + groupPos + " clicked",
Toast.LENGTH_SHORT).show();
return true;
}
return false;
}
public class MyExpandableListAdapter extends BaseExpandableListAdapter {
Context mContext;
public MyExpandableListAdapter() {
// TODO Auto-generated constructor stub
}
public MyExpandableListAdapter(Context context) {
mContext = context;
}
public Object getChild(int groupPosition, int childPosition) {
Log.i(TAG, "getChild");
return children[groupPosition][childPosition];
}
public long getChildId(int groupPosition, int childPosition) {
Log.i(TAG, "getChildId");
return childPosition;
}
public int getChildrenCount(int groupPosition) {
Log.i(TAG, "getChildId");
return children[groupPosition].length;
}
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
Log.i(TAG, "getChildView");
LayoutInflater layoutInflater = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View v = null;
TextView tt = null;
if (groupPosition == 4) {
v = layoutInflater.inflate(R.layout.button_group, null);
} else {
v = layoutInflater.inflate(R.layout.album_row, null);
tt = (TextView) v.findViewById(R.id.text1);
String myText = this.getChild(groupPosition, childPosition)
.toString();
tt.setText(myText);
CheckBox cb = (CheckBox) v.findViewById(R.id.checkbox);
cb.setVisibility(View.VISIBLE);
if (groupPosition == 0) {
ImageView icon = (ImageView) v.findViewById(R.id.rowicon);
icon.setImageResource(R.drawable.add_picture);
} else {
ImageView icon = (ImageView) v.findViewById(R.id.rowicon);
icon.setImageResource(R.drawable.add_picture);
}
}
return v;
}
public Object getGroup(int groupPosition) {
Log.i(TAG, "getGroup");
return groups[groupPosition];
}
public int getGroupCount() {
Log.i(TAG, "getGroupCount");
return groups.length;
}
public long getGroupId(int groupPosition) {
Log.i(TAG, "getGroupId");
return groupPosition;
}
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
TextView groupTitle = null;
ImageView imgDot;
LayoutInflater layoutInflater = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View v = null;
v = layoutInflater.inflate(R.layout.button_group, null);
groupTitle = (TextView) v.findViewById(R.id.TextView01);
String myText = this.getGroup(groupPosition).toString();
groupTitle.setText(myText);
imgDot = (ImageView) v.findViewById(R.id.ImageView01);
imgDot.setVisibility(View.VISIBLE);
return v;
}
public boolean isChildSelectable(int groupPosition, int childPosition) {
Log.i(TAG, "isChildSelectable");
return true;
}
public boolean hasStableIds() {
Log.i(TAG, "hasStableIds");
return true;
}
public void registerDataSetObserver(DataSetObserver observer) {
}
} // closing of MyExpandableListAdapter
} // closing of MyExpadableListActivity
我的xml视图如下
<?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="wrap_content"
android:minHeight="?android:attr/listPreferredItemHeight"
android:gravity="center_vertical"
android:paddingLeft="?android:attr/expandableListPreferredItemPaddingLeft"
android:paddingRight="?android:attr/scrollbarSize"
android:layout_weight="1" android:background="#fafafa">
<ImageView android:id="@+id/rowicon" android:layout_width="wrap_content"
android:layout_height="fill_parent" android:layout_marginRight="6dip" /> <TextView
android:id="@+id/text1"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:layout_weight="1"
/>
<CheckBox android:id="@+id/checkbox" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:layout_marginRight="2dip"
android:focusable="true" android:clickable="true" android:gravity="center_vertical"
android:orientation="vertical" android:duplicateParentState="true"
android:visibility="visible"
android:text="myTest"
/> </LinearLayout>
和
<?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="wrap_content"
android:minHeight="?android:attr/listPreferredItemHeight"
android:gravity="center_vertical"
android:paddingLeft="?android:attr/expandableListPreferredItemPaddingLeft"
android:paddingRight="?android:attr/scrollbarSize"
android:layout_weight="1" android:background="#fafafa">
答案 0 :(得分：4)
BaseExpandableListAdapter是一个功能：public boolean isChildSelectable(int groupPosition, int childPosition)。此函数返回Default false。将其更改为：return true。你的onChildClickListener将被调用！
答案 1 :(得分：2)
你忘了注册setOnChildClickListener(...)，但它不能用
onChildClick( )方法。
编辑1：您只需要在onCreate方法中添加一行：
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mAdapter = new MyExpandableListAdapter(this);
setListAdapter(mAdapter);
getExpandableListView().setOnChildClickListener(this); //This should fix issue.
registerForContextMenu(getExpandableListView()); //ContextMenu event override onChildClick and onGroupClick. Remove this line
}
编辑2：尝试this链接。如果它对你没有帮助，我建议你不要使用BaseExpandableListAdapter。使用SimpleExpandableListAdapter，重写4个方法：getChildView（），getGroupView（），getChildrenCount（）和getGroupCount（）。一切都应该是好的。
不要忘记写评论。如果这没有帮助，我会尝试找到更多的想法。
答案 2 :(得分：0)
我尝试在Kotlin中使用BaseExpandableListAdapter 实现 Android ExpandableListView。
我没有发布布局的XML代码。
Kotlin的主要活动：
import android.app.Activity
import android.os.Bundle
import android.widget.ExpandableListAdapter
import android.widget.ExpandableListView
import java.util.ArrayList
class expandable_sticky_kotlin: Activity() {
var listAdapter: ExpandableListAdapter? = null
var exp_view: ExpandableListView? = null
var list: MutableList<String>? = null
val childList:HashMap<String,List<String>>?=null
override fun onCreate(savedInstanceState: Bundle?)
{
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_expandable_sticky_header)
reloadData()
exp_view = findViewById(R.id.lvExp)
listAdapter = ExpandableAda(this,list,childList)
exp_view!!.setAdapter(listAdapter)
}
fun reloadData()
{
list!!.add("top250")
list!!.add("nowShowing")
list!!.add("comingSoon")
// Adding child data
val top250 = ArrayList<String>()
top250.add("The Shawshank Redemption")
top250.add("The Godfather")
top250.add("The Godfather: Part II")
top250.add("Pulp Fiction")
top250.add("The Good, the Bad and the Ugly")
top250.add("The Dark Knight")
top250.add("12 Angry Men")
top250.add("Dark knight")
top250.add("POTC")
val nowShowing = ArrayList<String>()
nowShowing.add("The Conjuring")
nowShowing.add("Despicable Me 2")
nowShowing.add("Turbo")
nowShowing.add("Grown Ups 2")
nowShowing.add("Red 2")
nowShowing.add("The Wolverine")
nowShowing.add("Deadpool2")
nowShowing.add("Raazi")
val comingSoon = ArrayList<String>()
comingSoon.add("2 Guns")
comingSoon.add("The Smurfs 2")
comingSoon.add("The Spectacular Now")
comingSoon.add("The Canyons")
comingSoon.add("Europa Report")
comingSoon.add("Avengers4")
comingSoon.add("Meri apni movie")
childList!!.put(list!!.get(0), top250) // Header, Child data
childList!!.put(list!!.get(1), nowShowing)
childList!!.put(list!!.get(2), comingSoon)
}
}
ExpandableView的适配器：
import android.content.Context
import android.database.DataSetObserver
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.BaseExpandableListAdapter
import android.widget.ExpandableListAdapter
import android.widget.TextView
import java.util.concurrent.ConcurrentLinkedQueue
class ExpandableAda(val context:Context,val list:List<String>?,val Child:HashMap<String,List<String>>?) : BaseExpandableListAdapter()
{
var mContext = context
var mparent_list = list
var mChild = Child
override fun onGroupCollapsed(p0: Int) {
println("collpased")
}
override fun isEmpty(): Boolean {
return false
}
override fun registerDataSetObserver(p0: DataSetObserver?)
{
println("here")
val observers = ConcurrentLinkedQueue<DataSetObserver>()
println("here")
if (p0!=null) {
observers.add(p0)
println("here")
}
}
override fun getChild(p0: Int, p1: Int): Any {
return mChild!!.get(mparent_list!!.get(p0))!!.get(p1)
}
override fun onGroupExpanded(p0: Int) {
print("Expanded")
}
override fun getCombinedChildId(p0: Long, p1: Long): Long
{
return p0
}
override fun getGroupId(p0: Int): Long {
return p0.toLong()
}
override fun isChildSelectable(p0: Int, p1: Int): Boolean {
return true
}
override fun hasStableIds(): Boolean {
return true
}
override fun getChildView(p0: Int, p1: Int, p2: Boolean, p3: View?, p4: ViewGroup?): View {
var title:String = getChild(p0,p1) as String
var myTest:View = p4!!
var infalInflater = this.mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater
myTest = infalInflater.inflate(R.layout.list_item, null)
var lblListItem:TextView = myTest!!.findViewById(R.id.lblListItem)
lblListItem.text = title
return myTest
}
override fun areAllItemsEnabled(): Boolean {
return true
}
override fun getChildId(p0: Int, p1: Int): Long {
return p1.toLong()//To change body of created functions use File | Settings | File Templates.
}
override fun getCombinedGroupId(p0: Long): Long {
return p0
}
override fun getGroupView(p0: Int, p1: Boolean, p2: View?, p3: ViewGroup?): View {
var title:String = mparent_list!!.get(p0)
var myTest:View = p3!!
var inflater = this.mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater
myTest = inflater.inflate(R.layout.list_group, null)
var lblListHeader:TextView = myTest!!.findViewById(R.id.lblListHeader)
lblListHeader.text = title
return myTest!!
}
override fun unregisterDataSetObserver(p0: DataSetObserver?) {
val observers = ConcurrentLinkedQueue<DataSetObserver>()
if (p0!=null)
{
observers.remove(p0)
}
}
override fun getGroupCount(): Int {
return mparent_list!!.size
}
override fun getGroup(p0: Int): Any {
return mparent_list!!.get(p0)
}
override fun getChildrenCount(p0: Int): Int {
return mChild!!.get(mparent_list!!.get(p0))!!.size
}
}