点击监听器上的ListView [英] Click Listener on ListView

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本文介绍了点击监听器上的ListView的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我已经修改了这个例子从SDK页面抓住所有的联络小组从手机并显示出来。我不能,但是,弄清楚如何点击其中一个,然后使用Groups._ID做别的事情。有人能教我如何获得一个点击/选择监听这个名单上?

MyListAdapter.java

 包com.example.simplelist;

进口android.app.ListActivity;
进口android.database.Cursor;
进口android.os.Bundle;
进口android.provider.Contacts.Groups;
进口android.widget.ListAdapter;
进口android.widget.SimpleCursorAdapter;

公共类MyListAdapter扩展ListActivity {

    @覆盖
    保护无效的onCreate(包savedInstanceState){
        super.onCreate(savedInstanceState);
        的setContentView(R.layout.custom_list_activity_view);
        光标mCursor = this.getContentResolver()查询(Groups.CONTENT_URI,NULL,NULL,NULL,NULL);
        startManagingCursor(mCursor);
        ListAdapter适配器=新SimpleCursorAdapter(这一点,android.R.layout.two_line_list_item,mCursor,新的String [] {Groups.NAME,Groups._ID},新的INT [] {android.R.id.text1,android.R.id .text2});
        setListAdapter(适配器);
    }
}
 

custom_list_activity_view.xml

 < XML版本=1.0编码=UTF-8&GT?;
 < LinearLayout中的xmlns:机器人=htt​​p://schemas.android.com/apk/res/android
         机器人:方向=垂直
         机器人:layout_width =FILL_PARENT
         机器人:layout_height =FILL_PARENT
         机器人:以下属性来=8DP
         机器人:paddingRight =8DP>

     < ListView的机器人:ID =@ ID / Android的:清单
               机器人:layout_width =FILL_PARENT
               机器人:layout_height =FILL_PARENT
               机器人:后台=#00FF00
               机器人:layout_weight =1
               机器人:drawSelectorOnTop =假的Andr​​oid版本:choiceMode =singleChoice机器人:可点击=真/>

     < TextView的机器人:ID =@ ID /安卓:空
               机器人:layout_width =FILL_PARENT
               机器人:layout_height =FILL_PARENT
               机器人:后台=#FF0000
               机器人:文本=无数据/>
 < / LinearLayout中>
 

two_line_list_item.xml

 < XML版本=1.0编码=UTF-8&GT?;
 < LinearLayout中的xmlns:机器人=htt​​p://schemas.android.com/apk/res/android
     机器人:layout_width =FILL_PARENT
     机器人:layout_height =WRAP_CONTENT
     机器人:方向=垂直>

     < TextView的机器人:ID =@ + ID / text1中
         机器人:TEXTSIZE =16SP
         机器人:TEXTSTYLE =黑体
         机器人:layout_width =FILL_PARENT
         机器人:layout_height =WRAP_CONTENT/>

     < TextView的机器人:ID =@ + ID /文本2
         机器人:TEXTSIZE =16SP
         机器人:layout_width =FILL_PARENT
         机器人:layout_height =WRAP_CONTENT/>
 < / LinearLayout中>
 

AndroidManifest.xml中

 < XML版本=1.0编码=UTF-8&GT?;
<舱单的xmlns:机器人=htt​​p://schemas.android.com/apk/res/android
      包=com.example.simplelist
      安卓版code =1
      机器人:VERSIONNAME =1.0>
    <使用-SDK安卓的minSdkVersion =3/>

    <应用机器人:图标=@可绘制/图标机器人:标签=@字符串/ APP_NAME>
        <活动机器人:名称=。MyListAdapter
                  机器人:标签=@字符串/ APP_NAME>
            <意向滤光器>
                <作用机器人:名称=android.intent.action.MAIN/>
                <类机器人:名称=android.intent.category.LAUNCHER/>
            &所述; /意图滤光器>
        < /活性GT;

    < /用途>
    <使用-权限的Andr​​oid:名称=android.permission.READ_CONTACTS/>
< /舱单>
 

解决方案

这应该允许您选择的项目进行互动,你想要的方式。

MyListAdapter.java

 包com.example.simplelist;
进口的java.util.ArrayList;
进口的java.util.HashMap;
进口的java.util.List;
进口的java.util.Map;
进口java.util.regex.Matcher中;
进口java.util.regex.Pattern中;
进口android.app.ListActivity;
进口android.content.ContentResolver;
进口android.content.Context;
进口android.database.Cursor;
进口android.os.Bundle;
进口android.provider.Contacts.Groups;
进口android.view.LayoutInflater;
进口android.view.View;
进口android.view.ViewGroup;
进口android.widget.BaseAdapter;
进口android.widget.ListView;
进口android.widget.SimpleAdapter;
进口android.widget.TextView;
进口android.widget.Toast;

公共类MyListAdapter扩展ListActivity {

    名单< ContactGroup>组=新的ArrayList< ContactGroup>();

    @覆盖
    保护无效的onCreate(包savedInstanceState){
        super.onCreate(savedInstanceState);
        的setContentView(R.layout.main);

        this.groups = getContacts();
        ContactGroupAdapter cAdapter =新ContactGroupAdapter(本);
        setListAdapter(cAdapter);
    }

    私人列表< ContactGroup> getContacts(){
        名单< ContactGroup> GRPS =新的ArrayList< ContactGroup>();
        ContentResolver的CR = getContentResolver();
        光标groupCur = cr.query(Groups.CONTENT_URI,NULL,NULL,NULL,NULL);
        如果(groupCur.getCount()大于0){
            而(groupCur.moveToNext()){
                ContactGroup新闻组=新ContactGroup();
                newGroup.Id = groupCur.getString(groupCur.getColumnIndex(Groups._ID));
                newGroup.Name = groupCur.getString(groupCur.getColumnIndex(Groups.NAME));
                grps.add(新闻组);
            }
        }
        返回GRPS;
    }

    @覆盖
    保护无效onListItemClick(ListView的L,视图V,INT位置,长的id){
        ContactGroup selectedGroup =新ContactGroup();
        selectedGroup = groups.get(位置);
        Toast.makeText(getBaseContext(),selectedGroup.Name +编号#+ selectedGroup.Id,1).show();
    }


    公共类ContactGroupAdapter扩展了BaseAdapter {
        公共ContactGroupAdapter(上下文C){
            mContext = C;
        }
        @覆盖
        公众诠释getCount将(){
            返回groups.size();
        }

        @覆盖
        公共对象的getItem(INT位置){
            返回的位置;
        }

        @覆盖
        众长getItemId(INT位置){
            返回的位置;
        }

        @覆盖
        公共查看getView(INT位置,查看convertView,ViewGroup中父){
            ViewHolder持有人;
            如果(convertView == NULL){
                LayoutInflater VI = LayoutInflater.from(this.mContext);
                convertView = vi.inflate(R.layout.two_line_list_item,NULL);
                持有人=新ViewHolder();
                convertView.setTag(保持器);
            }
            其他 {
                //获取观点持有者回
                支架=(ViewHolder)convertView.getTag();
            }
            ContactGroup C = groups.get(位置);
            如果(C!= NULL){
                //名称
                holder.toptext =(TextView中)convertView.findViewById(R.id.text1);
                holder.toptext.setText(c.Name);
                // ID
                holder.bottomtext =(TextView中)convertView.findViewById(R.id.text2);
                holder.bottomtext.setText(c.Id);
            }
            返回convertView;
        }
        私人语境mContext;

    }
    公共静态类ViewHolder {
        TextView中的TopText;
        TextView的bottomtext;
    }

    公共类ContactGroup {
        公共字符串ID;
        公共字符串名称;
    }

}
 

two_line_list_item.xml

 < XML版本=1.0编码=UTF-8&GT?;
<的LinearLayout机器人:ID =@ + ID / LinearLayout01机器人:layout_width =FILL_PARENT
    机器人:layout_height =FILL_PARENT的xmlns:机器人=htt​​p://schemas.android.com/apk/res/android>

         < TextView的机器人:ID =@ + ID / text1中
         机器人:TEXTSIZE =16SP
         机器人:TEXTSTYLE =黑体
         机器人:layout_width =FILL_PARENT
         机器人:layout_height =WRAP_CONTENT/>

     < TextView的机器人:ID =@ + ID /文本2
         机器人:TEXTSIZE =16SP
         机器人:layout_width =FILL_PARENT
         机器人:layout_height =WRAP_CONTENT/>

< / LinearLayout中>
 

I have modified this example from the SDK pages to grab all the Contact Groups from the phone and display them. I cannot, however, figure out how to click one of them and then use the Groups._ID to do something else. Can someone teach me how to get a click/select listener on this list?

MyListAdapter.java

package com.example.simplelist;

import android.app.ListActivity;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.Contacts.Groups;
import android.widget.ListAdapter;
import android.widget.SimpleCursorAdapter;

public class MyListAdapter extends ListActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.custom_list_activity_view);
        Cursor mCursor = this.getContentResolver().query(Groups.CONTENT_URI, null, null, null, null);
        startManagingCursor(mCursor);
        ListAdapter adapter = new SimpleCursorAdapter(this, android.R.layout.two_line_list_item, mCursor, new String[] {Groups.NAME, Groups._ID}, new int[] {android.R.id.text1, android.R.id.text2});
        setListAdapter(adapter);
    }
}

custom_list_activity_view.xml

<?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
         android:orientation="vertical"
         android:layout_width="fill_parent"
         android:layout_height="fill_parent"
         android:paddingLeft="8dp"
         android:paddingRight="8dp">

     <ListView android:id="@id/android:list"
               android:layout_width="fill_parent"
               android:layout_height="fill_parent"
               android:background="#00FF00"
               android:layout_weight="1"
               android:drawSelectorOnTop="false" android:choiceMode="singleChoice" android:clickable="true" />

     <TextView android:id="@id/android:empty"
               android:layout_width="fill_parent"
               android:layout_height="fill_parent"
               android:background="#FF0000"
               android:text="No data"/>
 </LinearLayout>

two_line_list_item.xml

<?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:orientation="vertical">

     <TextView android:id="@+id/text1"
         android:textSize="16sp"
         android:textStyle="bold"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"/>

     <TextView android:id="@+id/text2"
         android:textSize="16sp"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"/>
 </LinearLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.example.simplelist"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="3" />

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".MyListAdapter"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>
    <uses-permission android:name="android.permission.READ_CONTACTS" />
</manifest>

解决方案

This should allow you to interact with selected item the way you want.

MyListAdapter.java

package com.example.simplelist;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import android.app.ListActivity;
import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.Contacts.Groups;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;

public class MyListAdapter extends ListActivity {

    List<ContactGroup> groups = new ArrayList<ContactGroup>(); 

    @Override
    protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        this.groups = getContacts();
        ContactGroupAdapter cAdapter = new ContactGroupAdapter(this); 
        setListAdapter(cAdapter);
    }

    private List<ContactGroup> getContacts(){
        List<ContactGroup> grps = new ArrayList<ContactGroup>();
        ContentResolver cr = getContentResolver();
        Cursor groupCur = cr.query(Groups.CONTENT_URI, null, null, null, null);
        if (groupCur.getCount() > 0) {
            while (groupCur.moveToNext()) {
                ContactGroup newGroup = new ContactGroup();
                newGroup.Id = groupCur.getString(groupCur.getColumnIndex(Groups._ID));
                newGroup.Name = groupCur.getString(groupCur.getColumnIndex(Groups.NAME));
                grps.add(newGroup);
            }
        }
        return grps;
    }

    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
        ContactGroup selectedGroup = new ContactGroup();
        selectedGroup = groups.get(position);
        Toast.makeText(getBaseContext(), selectedGroup.Name + " ID #" + selectedGroup.Id, 1).show();
    }


    public class ContactGroupAdapter extends BaseAdapter{
        public ContactGroupAdapter(Context c) {
            mContext = c;
        }
        @Override
        public int getCount() {
            return groups.size();
        }

        @Override
        public Object getItem(int position) {
            return position;
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder;
            if(convertView == null){
                LayoutInflater vi = LayoutInflater.from(this.mContext);  
                convertView = vi.inflate(R.layout.two_line_list_item, null);
                holder = new ViewHolder();
                convertView.setTag(holder); 
            }
            else {
                //Get view holder back
                holder = (ViewHolder) convertView.getTag();
            }
            ContactGroup c = groups.get(position);
            if (c != null) {
                //Name
                holder.toptext = (TextView) convertView.findViewById(R.id.text1);
                holder.toptext.setText(c.Name);
                //ID
                holder.bottomtext = (TextView) convertView.findViewById(R.id.text2);
                holder.bottomtext.setText(c.Id);
            }
            return convertView;
        }
        private Context mContext;

    }
    public static class ViewHolder {
        TextView toptext;
        TextView bottomtext;
    }

    public class ContactGroup{
        public String Id;
        public String Name;
    }

}

two_line_list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:id="@+id/LinearLayout01" android:layout_width="fill_parent" 
    android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android">

         <TextView android:id="@+id/text1"
         android:textSize="16sp"
         android:textStyle="bold"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"/>

     <TextView android:id="@+id/text2"
         android:textSize="16sp"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"/>

</LinearLayout>

这篇关于点击监听器上的ListView的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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