自定义expandablelistview无法正常工作 [英] Custom expandablelistview is not working
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问题描述
我停止了自定义ExpandableListView，但点击它时它不会扩展。
activity_main.xml
I ceated custom ExpandableListView but it does not expand when I click on it.
activity_main.xml
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<ExpandableListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/exp_lv"
></ExpandableListView>
</RelativeLayout>
group_items.xml
group_items.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<TextView
android:layout_width="270sp"
android:layout_height="30sp"
android:layout_marginLeft="30sp"
android:id="@+id/title"
android:textIsSelectable="true"
/>
<CheckBox
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/chk"
/>
</LinearLayout>
child_items.xml
child_items.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/child"
android:textIsSelectable="true"
/>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
>
<TextView
android:layout_width="120sp"
android:layout_height="wrap_removed"
android:textIsSelectable="true"
android:id="@+id/dd"
android:textStyle="bold"
/>
<TextView
android:layout_width="200sp"
android:layout_height="wrap_content"
android:layout_toRightOf="@+id/dd"
android:textIsSelectable="true"
android:id="@+id/date"
/>
</RelativeLayout>
</LinearLayout>
group.java
group.java
package com.example.expandablelistview;
import java.util.ArrayList;
public class group {
private String Name;
private boolean isSelected;
private ArrayList<child> Items;
public String getName() {
return Name;
}
public void setName(String name) {
Name = name;
}
public boolean isSelected() {
return isSelected;
}
public void setSelected(boolean isSelected) {
this.isSelected = isSelected;
}
public ArrayList<child> getItems() {
return Items;
}
public void setItems(ArrayList<child> items) {
Items = items;
}
}
child.java
child.java
package com.example.expandablelistview;
public class child {
String child_title;
String dd;
String date;
public String getChild_title() {
return child_title;
}
public void setChild_title(String child_title) {
this.child_title = child_title;
}
public String getDd() {
return dd;
}
public void setDd(String dd) {
this.dd = dd;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
}
MyBaseAdapter.java
MyBaseAdapter.java
package com.example.expandablelistview;
import java.util.ArrayList;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.CheckBox;
import android.widget.TextView;
public class MyBaseAdapter extends BaseExpandableListAdapter{
Context context;
ArrayList<group> group_al;
public MyBaseAdapter(Context context,ArrayList<group> group_al) {
this.context=context;
this.group_al=group_al;
}
@Override
public Object getChild(int groupPosition, int childPosition) {
ArrayList<child> chList = group_al.get(groupPosition).getItems();
return chList.get(childPosition);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView,
ViewGroup parent) {
child ch = (child) getChild(groupPosition, childPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) context
.getSystemService(context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.child_items, null);
}
TextView child = (TextView) convertView.findViewById(R.id.child);
TextView dd = (TextView) convertView.findViewById(R.id.dd);
TextView date= (TextView) convertView.findViewById(R.id.date);
child.setText(ch.getChild_title().toString());
dd.setText(ch.getChild_title().toString());
date.setText(ch.getChild_title().toString());
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
ArrayList<child> chList = group_al.get(groupPosition).getItems();
return chList.size();
}
@Override
public Object getGroup(int groupPosition) {
return group_al.get(groupPosition);
}
@Override
public int getGroupCount() {
return group_al.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
group gr = (group) getGroup(groupPosition);
long group_id = getGroupId(groupPosition);
if (convertView == null) {
LayoutInflater inf = (LayoutInflater) context
.getSystemService(context.LAYOUT_INFLATER_SERVICE);
convertView = inf.inflate(R.layout.group_items, null);
}
TextView title = (TextView) convertView.findViewById(R.id.title);
title.setText(gr.getName());
CheckBox chk=(CheckBox) convertView.findViewById(R.id.chk);
chk.setFocusable(false);
return convertView;
}
@Override
public boolean hasStableIds() {
return true;
}
@Override
public boolean isChildSelectable(int arg0, int arg1) {
return false;
}
}
MainActivity.java
MainActivity.java
package com.example.expandablelistview;
import java.util.ArrayList;
import android.os.Bundle;
import android.app.Activity;
import android.widget.ExpandableListView;
public class MainActivity extends Activity {
private MyBaseAdapter ExpAdapter;
private ArrayList<group> ExpListItems;
private ExpandableListView ExpandList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ExpandList = (ExpandableListView) findViewById(R.id.exp_lv);
ExpListItems = SetStandardGroups();
ExpAdapter = new MyBaseAdapter(MainActivity.this, ExpListItems);
ExpandList.setAdapter(ExpAdapter);
}
private ArrayList<group> SetStandardGroups() {
ArrayList<group> list = new ArrayList<group>();
group gru= new group();
gru.setName("Tax 1");
ArrayList<child> ch_list= new ArrayList<child>();
child ch = new child();
ch.setChild_title("Information of tax 1");
ch.setDd("Due Date:");
ch.setDate("22/02/2016");
ch_list.add(ch);
gru.setItems(ch_list);
list.add(gru);
return list;
}
}
Please guys help me.
Thanks in advance.
What I have tried:
When I run the application I can see the first row of ExpandableListView i.e. Tax1 with CheckBox beside it but when I click on the row then it does not expanded.
Please guys help me.
Thanks in advance.
What I have tried:
When I run the application I can see the first row of ExpandableListView i.e. Tax1 with CheckBox beside it but when I click on the row then it does not expanded.
推荐答案
Hello I think your code in the Oncreate Method is not complete. You have not set the click listener.
Hello I think your code in the Oncreate Method is not complete. You have not set the click listener.
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ExpandList = (ExpandableListView) findViewById(R.id.exp_lv);
ExpListItems = SetStandardGroups();
ExpAdapter = new MyBaseAdapter(MainActivity.this, ExpListItems);
ExpandList.setAdapter(ExpAdapter);
ExpandList.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
return false;
}
});
ExpandList.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
Toast.makeText(
getApplicationContext(),
listDataHeader.get(groupPosition)
+ " : "
+ listDataChild.get(
listDataHeader.get(groupPosition)).get(
childPosition), Toast.LENGTH_SHORT)
.show();
return false;
}
});
}
Try something like that. And lets know whats happening.
Try something like that. And lets know whats happening.
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