android 有事件处理的网格视图

 

 

在要求不严格的是时候建议使用SimpleAdapter完成。

 

 

在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" >

 

    <GridView

        android:id="@+id/myGridView"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:layout_marginLeft="30dp"

        android:layout_marginTop="15dp"

        android:numColumns="3"

        android:stretchMode="columnWidth"/>

 

</LinearLayout>

 

 

 

 

在grid_layout.xml中

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:orientation="horizontal"

    android:background="#000000">

 

    <ImageView

        android:id="@+id/img"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:scaleType="center"

        android:padding="8px"/>

 

</LinearLayout>

 

 

 

 

 

在MyGridViewDemo.java程序中

package com.tarena.grideview;

 

import java.text.DateFormat.Field;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

 

import android.app.Activity;

import android.app.AlertDialog;

import android.app.Dialog;

import android.content.DialogInterface;

import android.os.Bundle;

import android.view.View;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.ArrayAdapter;

import android.widget.GridView;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.LinearLayout.LayoutParams;

import android.widget.SimpleAdapter;

 

public class MyGridViewDemo extends Activity {

  private GridView myGridView = null;   //取得组件

  private SimpleAdapter simpleAdapter = null;

  private List<Map<String, Integer>>list = new ArrayList<Map<String, Integer>>();

 

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        super.setContentView(R.layout.main);

        this.initAdapter();     //实例化SimpleAdapter类对象

        this.myGridView = (GridView)super.findViewById(R.id.myGridView);

        this.myGridView.setAdapter(this.simpleAdapter);

        this.myGridView.setOnItemClickListener(new OnItemClickListenerImpl());

    }

   

    private class OnItemClickListenerImpl implements OnItemClickListener{

 

     public void onItemClick(AdapterView<?> parent, View view, int position,

         long id) {

       ImageView showImg = new ImageView(MyGridViewDemo.this);

       showImg.setScaleType(ImageView.ScaleType.CENTER);  //图片居中对齐

       showImg.setLayoutParams(new LinearLayout.LayoutParams(

           LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT));

       @SuppressWarnings("unchecked")

       Map<String, Integer> map = (Map<String, Integer>)parent.getAdapter().getItem(position);

       showImg.setImageResource(map.get("img")); //设置显示图片

       Dialog dialog = new AlertDialog.Builder(MyGridViewDemo.this)

         .setIcon(R.drawable.ic_launcher).setTitle("查看图片")

         .setView(showImg).setNegativeButton("关闭",new DialogInterface.OnClickListener() {

           

           public void onClick(DialogInterface dialog, int which) {

              // TODO Auto-generated method stub

             

            }

         }).create();

       dialog.show();

     }

   

    }

   

    private void initAdapter(){

    java.lang.reflect.Field[] fields = R.drawable.class.getDeclaredFields();

    for(int x = 0;x < fields.length; x++){

        if(fields[x].getName().startsWith("ispic_")){

          Map<String, Integer> map = new HashMap<String, Integer>();

          try {

            map.put("img",fields[x].getInt(R.drawable.class));

         } catch (Exception e) {

            e.printStackTrace();

         }

          this.list.add(map);

        }

    }

    this.simpleAdapter = new SimpleAdapter(this,this.list,

          R.layout.gird_layout,new String[]{"img"},

          new int[]{R.id.img});

    }

}