ExpandableListView Demo AndroidS

關於ExpandableListView心得DEMO放在這給自己留個紀錄

1.設定group.xml

2.設定child.xml

3.設定MainActivity內容

4.設定BaseExpandableListAdapter

我直接PO出代碼, 有必要的部份再說明

1.設定group.xml

    xmlns:app="http://schemas.android.com/apk/res-auto"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="wrap_content">

        android:id="@+id/GroupTV"

        android:layout_width="0dp"

        android:layout_height="35dp"

        android:layout_marginEnd="8dp"

        android:layout_marginStart="8dp"

        android:layout_marginTop="4dp"

        android:text="TextView"

        android:textAlignment="center"

        android:textColor="@android:color/black"

        android:textSize="18sp"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toTopOf="parent" />

2.設定child.xml

    xmlns:app="http://schemas.android.com/apk/res-auto"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="wrap_content">

        android:id="@+id/NameTV"

        android:layout_width="0dp"

        android:layout_height="wrap_content"

        android:layout_marginEnd="8dp"

        android:layout_marginStart="8dp"

        android:layout_marginTop="4dp"

        android:text="TextView"

        android:textAlignment="center"

        android:textColor="@color/colorPrimaryDark"

        android:textSize="18sp"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toTopOf="parent" />

        android:id="@+id/PhoneTV"

        android:layout_width="113dp"

        android:layout_height="21dp"

        android:layout_marginEnd="8dp"

        android:layout_marginStart="8dp"

        android:layout_marginTop="4dp"

        android:text="TextView"

        android:textAlignment="center"

        android:textColor="@android:color/darker_gray"

        android:textSize="12sp"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintHorizontal_bias="0.659"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toBottomOf="@+id/NameTV" />

3.設定MainActivity

package com.bryan4tw.expandblelvdemo;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.widget.ExpandableListAdapter;

import android.widget.ExpandableListView;

import java.lang.reflect.Array;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

public class MainActivity extends AppCompatActivity {

ExpandableListView expandableListView;

ExpandableListAdapter expandableListAdapter;

Listgroups;

Map>childs;

Map>child_phone;

@Override

    protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

initdata();

expandableListView = (ExpandableListView)findViewById(R.id.ExListView);

expandableListAdapter =new myexpandableadapter(this,groups,childs,child_phone);

expandableListView.setAdapter(expandableListAdapter);

}

private void initdata(){

groups =new ArrayList<>();

childs =new HashMap<>();

child_phone =new HashMap<>();

groups.add("City A");

groups.add("City B");

ArrayList A =new ArrayList();

ArrayList B =new ArrayList();

A.add("Howard");

A.add("Bryan");

A.add("COCO");

B.add("Lima");

B.add("Allen");

B.add("Eric");

B.add("joey");

childs.put(groups.get(0),A);

childs.put(groups.get(1),B);

ArrayList a_p =new ArrayList();

ArrayList b_p =new ArrayList();

a_p.add("A11111");

a_p.add("B11111");

a_p.add("C11111");

b_p.add("A22222");

b_p.add("B22222");

b_p.add("C22222");

b_p.add("D22222");

child_phone.put(groups.get(0),a_p);

child_phone.put(groups.get(1),b_p);

}

}

4.設定BaseExpandableListAdapter(新增一個java class.命名:myexpandableadapter)

package com.bryan4tw.expandblelvdemo;

import android.content.Context;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseExpandableListAdapter;

import android.widget.TextView;

import android.widget.Toast;

import java.util.List;

import java.util.Map;

/**

* Created by dsall on 2018/1/19.

*/

public class myexpandableadapter extends BaseExpandableListAdapter{

Context context;

Listgroups;

Map>childs;

Map>child_phone;

public myexpandableadapter(Context context,Listgroups,Map>childs,Map>child_phone) {

this.context =context;

this.groups =groups;

this.childs =childs;

this.child_phone =child_phone;

}

@Override

    public int getGroupCount() {

return groups.size();

}

@Override

    public int getChildrenCount(int groupPosition) {

return childs.get(groups.get(groupPosition)).size();

}

@Override

    public Object getGroup(int groupPosition) {

return groups.get(groupPosition);

}

@Override

    public Object getChild(int groupPosition,int childPosition) {

return childs.get(groups.get(groupPosition)).get(childPosition);

}

@Override

    public long getGroupId(int groupPosition) {

return groupPosition;

}

@Override

    public long getChildId(int groupPosition,int childPosition) {

return childPosition;

}

@Override

    public boolean hasStableIds() {

return false;

}

@Override

    public View getGroupView(int groupPosition,boolean isExpanded,View convertView,ViewGroup parent) {

String group = (String)getGroup(groupPosition);

if(convertView ==null){

LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

convertView =inflater.inflate(R.layout.group,null);

}

TextView grouptv = (TextView)convertView.findViewById(R.id.GroupTV);

grouptv.setText(group);

return convertView;

}

@Override

    public View getChildView(int groupPosition,int childPosition,boolean isLastChild,View convertView,ViewGroup parent) {

String names = (String)getChild(groupPosition,childPosition);

final String phone = (String)child_phone.get(groups.get(groupPosition)).get(childPosition);

if(convertView ==null){

LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

convertView =inflater.inflate(R.layout.child,null);

}

final TextView nametv = (TextView)convertView.findViewById(R.id.NameTV);

nametv.setText(names);

nametv.setOnClickListener(new View.OnClickListener() {

@Override

            public void onClick(View v) {

Toast.makeText(context,"Click " +nametv.getText().toString(),Toast.LENGTH_SHORT).show();

}

});

final TextView phonetv = (TextView)convertView.findViewById(R.id.PhoneTV);

phonetv.setText(phone);

phonetv.setOnClickListener(new View.OnClickListener() {

@Override

            public void onClick(View v) {

Toast.makeText(context,"Click " +phonetv.getText().toString(),Toast.LENGTH_SHORT).show();

}

});

return convertView;

}

@Override

    public boolean isChildSelectable(int groupPosition,int childPosition) {

return true;

}

}

以上都直接覆制贴上即可使用,

activity_main.xml裡自己拉一个ExpandableListView进去, id取名为 ExListView 即可执行

5.注意事項

控制child.xml的物件在myexpandableadapterl裡的getChildView做物件监听控制.

此代码同时传入两个值到child, 如果要增加, 可按相同模式增加, 记得MainActivity的传入与myexpandableadapterl的接收方都要一致才行.