ListView中ImageView 点击显示在 Toast 上

最新推荐文章于 2021-05-27 11:04:37 发布

qq_16959405

最新推荐文章于 2021-05-27 11:04:37 发布

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分类专栏： Android问题记录

本文链接：https://blog.youkuaiyun.com/qq_16959405/article/details/43305399

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本文介绍了一个使用Android平台创建虚拟数据列表的应用案例。该应用通过自定义的Java类生成虚拟数据，并利用SimpleAdapter适配器将数据绑定到ListView中进行展示。文章提供了完整的代码实现及布局文件，展示了如何设置数据项的点击事件。

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主要代码：

构建虚拟数据类：

VirtualData.java

package com.data;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.Activity;

import com.example.demo.R;

public class VirtualData extends Activity{
		private List
   
    > list;
		
		//初始化img信息
		private int[] imgListData= new int[]
				{
				R.drawable.img_01,R.drawable.img_02,
				R.drawable.img_03,R.drawable.img_04,
				R.drawable.img_05,R.drawable.img_07
				};
		private String[] title = new String[]
				{
				"腾讯","360","爱奇艺","欧游","迅雷","谷歌"
				};
		private String[] info = new String[]
				{
				"腾讯QQ","360卫士","爱奇艺播放器","欧游浏览器","迅雷播放器","谷歌浏览器"
				};
		
		public List
    
     
      > getData()
		{
			this.list = createData();
			return list;
		}
		public List
      
       
        > createData() { List
        
         
          > list = new ArrayList
          
           
            >(); Map
            
              map; for(int i=0;i
             
              (); map.put("title", title[i]); map.put("info", info[i]); map.put("img", imgListData[i]); map.put("imgid", imgListData[i]); list.add(map); } return list; } }

activity_virtual_vlist.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"
    tools:context="com.example.demo.VirtualVListActivity" >

    <ListView android:id="@+id/vlist"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"></ListView>

</RelativeLayout>

vlist.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="match_parent"
    android:orientation="horizontal" >

    <ImageView 
        android:id="@+id/img"
        android:layout_width="60dp"
        android:layout_height="60dp"
        android:scaleType="fitCenter"
        android:background="@drawable/image"
        android:layout_margin="3px"/>
    <LinearLayout
        android:orientation="vertical"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">"
	    <TextView
	        android:id="@+id/title"
	        android:layout_width="wrap_content"
	        android:layout_height="wrap_content"
	        android:textSize="22px"
	        android:text="" />
	    <TextView
	        android:id="@+id/info"
	        android:layout_width="wrap_content"
	        android:layout_height="wrap_content"
	        android:textSize="12px"
	        android:text="" />
	    <TextView
	        android:id="@+id/imgid"
	        android:layout_width="wrap_content"
	        android:layout_height="wrap_content"
	        android:textSize="12px"
	        android:text="" />
	</LinearLayout>
</LinearLayout>

VirtualVListActivity.java

package com.example.demo;

import java.util.List;
import java.util.Map;

import android.content.Context;
import android.content.res.Resources;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;

import com.data.VirtualData;

public class VirtualVListActivity extends ActionBarActivity {
	
	private ListView listView;
	private List
    
     > mData;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_virtual_vlist);
		
		listView =  (ListView)findViewById(R.id.vlist);
		listView.setOnItemClickListener(itemListener);
		
		VirtualData vData = new VirtualData();
		mData = vData.getData();
		SimpleAdapter adapter = buildSimpleAdapter(this, mData);
		setListAdapter(adapter);
		Map
     
       map = mData.get(4);
	}

	OnItemClickListener itemListener = new OnItemClickListener() {

		@Override
		public void onItemClick(AdapterView
       parent, View view, int position,
				long id) {
			TextView title = (TextView)view.findViewById(R.id.title);
			TextView info = (TextView)view.findViewById(R.id.info);
			ImageView img = (ImageView)view.findViewById(R.id.img);
			
			Resources res = img.getResources();
			String idString = res.getResourceEntryName(img.getId());
			String detailMsg = "公司：" + title.getText().toString() + "\n\r软件：" + info.getText().toString() + position;
			showToast(detailMsg,img);
			
		}
	};
	private void showToast(String detailMsg,ImageView img)
	{
		Toast toast = Toast.makeText(this, detailMsg, 1000);
		toast.setGravity(Gravity.CENTER, 0, 0);
		
		LinearLayout toastView = (LinearLayout)toast.getView();
		ImageView imageCodeProject = new ImageView(getApplicationContext());
		
		imageCodeProject.setImageDrawable(img.getDrawable());
		toastView.addView(imageCodeProject,0);
		
		
		toast.show();
	}
	private SimpleAdapter buildSimpleAdapter(Context context,List
      
       
        > mData)
	{
		SimpleAdapter adapter = new SimpleAdapter(context, mData, 
				R.layout.vlist, 
				new String[]{"title","info","img","imgid"}, 
				new int[]{R.id.title,R.id.info,R.id.img,R.id.imgid});
		return adapter;
	}
	
	private void setListAdapter(SimpleAdapter adapter)
	{
		
		listView.setAdapter(adapter);
		
	}
	
	
	
	
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.virtual_vlist, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// Handle action bar item clicks here. The action bar will
		// automatically handle clicks on the Home/Up button, so long
		// as you specify a parent activity in AndroidManifest.xml.
		int id = item.getItemId();
		if (id == R.id.action_settings) {
			return true;
		}
		return super.onOptionsItemSelected(item);
	}
}

运行效果：