Question

美好的一天！我是android编程和java的新手，所以我在互联网上做了一个源代码的复制粘贴然后它工作但我必须做一些编辑。

我想问一下当我点击每个应该打开/关闭的组的开关而不是吐司时如何添加功能。我知道如何使用onClickListener不知何故，但我不知道在哪里放功能。

任何答案或良好的教程链接都将非常感谢谢谢！

MainActivity.java

package com.capstone.r.e.d.e_kit;
import java.util.ArrayList;

import android.app.ExpandableListActivity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.widget.ExpandableListView;

public class MainActivity extends ExpandableListActivity{

private ArrayList<String> parentItems = new ArrayList<String>();
private ArrayList<Object> childItems = new ArrayList<Object>();

@Override
public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    // this is not really  necessary as ExpandableListActivity contains an ExpandableList
    //setContentView(R.layout.main);


    ExpandableListView expandableList = getExpandableListView(); // you can use (ExpandableListView) findViewById(R.id.list)

    expandableList.setDividerHeight(2);
    expandableList.setGroupIndicator(null);
    expandableList.setClickable(true);

    setGroupParents();
    setChildData();

    MainActivityAdapter adapter = new MainActivityAdapter(parentItems, childItems);

    adapter.setInflater((LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE), this);
    expandableList.setAdapter(adapter);
    expandableList.setOnChildClickListener(this);
}

public void setGroupParents() {
    parentItems.add("Flash Light");
    parentItems.add("Whistle");
    parentItems.add("Infographics");
    parentItems.add("Battery Saving Mode");
}

public void setChildData() {

    // Flash Light
    ArrayList<String> child = new ArrayList<String>();
    child.add("Switch");
    childItems.add(child);


    // Whistle
    child = new ArrayList<String>();
    child.add("Switch");    
    childItems.add(child);

    // Information
    child = new ArrayList<String>();
    child.add("Online News");
    child.add("Do's and Dont's");
    childItems.add(child);


    // Battery Saving Mode
    child = new ArrayList<String>();
    child.add("Switch");
    childItems.add(child);
}

}

MainActivityAdapter.java

package com.capstone.r.e.d.e_kit;


import java.util.ArrayList;

import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.CheckedTextView;
import android.widget.TextView;
import android.widget.Toast;


public class MainActivityAdapter extends BaseExpandableListAdapter {

private Activity activity;
private ArrayList<Object> childtems;
private LayoutInflater inflater;
private ArrayList<String> parentItems, child;


public MainActivityAdapter(ArrayList<String> parents, ArrayList<Object> childern) {
    this.parentItems = parents;
    this.childtems = childern;
}

public void setInflater(LayoutInflater inflater, Activity activity) {
    this.inflater = inflater;
    this.activity = activity;
}


@SuppressWarnings("unchecked")
@Override
public View getChildView(int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {

    child = (ArrayList<String>) childtems.get(groupPosition);

    TextView textView = null;

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

    textView = (TextView) convertView.findViewById(R.id.textView1);
    textView.setText(child.get(childPosition));

    convertView.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View view) {
            Toast.makeText(activity, child.get(childPosition),
                    Toast.LENGTH_SHORT).show();
        }
    });

    return convertView;
}

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

    if (convertView == null) {
        convertView = inflater.inflate(R.layout.row, null);
    }

    ((CheckedTextView) convertView).setText(parentItems.get(groupPosition));
    ((CheckedTextView) convertView).setChecked(isExpanded);

    return convertView;
}

@Override
public Object getChild(int groupPosition, int childPosition) {
    return null;
}

@Override
public long getChildId(int groupPosition, int childPosition) {
    return 0;
}

@Override
public int getChildrenCount(int groupPosition) {
    return ((ArrayList<String>) childtems.get(groupPosition)).size();
}

@Override
public Object getGroup(int groupPosition) {
    return null;
}

@Override
public int getGroupCount() {
    return parentItems.size();
}

@Override
public void onGroupCollapsed(int groupPosition) {
    super.onGroupCollapsed(groupPosition);
}

@Override
public void onGroupExpanded(int groupPosition) {
    super.onGroupExpanded(groupPosition);
}

@Override
public long getGroupId(int groupPosition) {
    return 0;
}



@Override
public boolean hasStableIds() {
    return false;
}

@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
    return false;
}

}

activity_main.xml中

<?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="fill_parent"
android:orientation="vertical" >

        <ExpandableListView
            android:id="@+id/list"
            android:layout_height="match_parent"
            android:layout_width="match_parent"
            android:groupIndicator="@null" />   

</LinearLayout>

row.xml

<CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="60dp"
android:layout_marginLeft="5dp"
android:gravity="center_vertical"
android:padding="10dp"
android:textColor="#FFFFFF"
android:textSize="15sp"
android:background="#339966"
/>

group.xml

<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="40dp"
android:background="@android:color/white"
android:clickable="true"
android:orientation="vertical"
android:paddingLeft="40dp"
tools:context=".MainActivity" >

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="39dp"
    android:gravity="center_vertical">

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="5dp"
        android:textIsSelectable="true"
        android:textColor="#000000"
        android:textSize="14sp"
         />
</LinearLayout>


</LinearLayout>

Answer 1

尝试设置setOnGroupClickListener：

adapter.setInflater((LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE), this);
    expandableList.setAdapter(adapter);
    expandableList.setOnChildClickListener(this);
expandableList.setOnGroupClickListener(this); //Implement inteface ExpandableListView.OnGroupClickListener

Documatation： http://developer.android.com/reference/android/widget/ExpandableListView.html#setOnGroupClickListener(android.widget.ExpandableListView.OnGroupClickListener)

教程： http://www.vogella.com/tutorials/AndroidListView/article.html#expandablelistview

如何在expandablelistview中添加子项的功能？

1 个答案: