Android GridView宫格视图之 BaseAdapter

①　新建工程
②　在res/drawable目录下添加名称为a.png---p.png的图片
③　修改main.xml布局，添加一个GridView、一个ImageView
<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout
    android:id="@+id/widget0"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    xmlns:android="http://schemas.android.com/apk/res/android">
<GridView
    android:id="@+id/grid"
    android:layout_width="fill_parent"
    android:padding="30dip"
    android:columnWidth="52px"
    android:layout_height="210px"
    android:numColumns="5">
    
</GridView>
<ImageView
    android:id="@+id/ImageView_Big"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_x="95px"
    android:layout_y="250px">
</ImageView>
</AbsoluteLayout>
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④　GridView的定义与实例化
/*定义类对象*/
private GridView my_gridview;
/*从xml中获取UI资源对象*/
my_gridview = (GridView) findViewById(R.id.grid);
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⑤　GridView的图像内容设置与ImageAdapter

/*新建一个自定义的ImageAdapter*/
myImageViewAdapter = new ImageAdapter(this);
/*为GridView对象设置一个ImageAdapter*/
my_gridview.setAdapter(myImageViewAdapter);
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⑥　内部类 ImageAdapter，实现了BaseAdapter
private class myImageAdapter extends BaseAdapter{
@Override
public int getCount() {
// TODO Auto-generated method stub
return 0;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getView(int position,
View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
return null;
}
}
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⑦　GridView的图片Items点击事件处理
/*为GridView添加图片Items点击事件易做图*/
my_gridview.setOnItemClickListener(this);
@Override
public void onItemClick(AdapterView<?> arg0,
View arg1, int arg2, long arg3) {
// TODO Auto-generated method stub
/*点击GridView中图片Items事件处理*/
}
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⑧　GridView移动后选中图片Items的事件处理
/*为GridView添加图片Items移动选中事件易做图*/
my_gridview.setOnItemSelectedListener(this);
@Override
public void onItemSelected(AdapterView<?> arg0,
View arg1, int arg2,long arg3) {
// TODO Auto-generated method stub
/*GridView中的图片移动焦点选中时事件处理*/
}
/*未选中GridView中的图片Items事件处理*/
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
-----------------------------具体代码如下--------------------------------
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⑨　修改mainActivity.java来实现图片点击和图片移动选中的效果
package zyf.GridViewTest;
/*导入要使用的包*/
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInte易做图ce;
import android.content.DialogInte易做图ce.OnClickListener;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
public class GridViewTest extends Activity implements
                                      GridView.OnItemClickListener,
                                      GridView.OnItemSelectedListener {
/** Called when the activity is first created. */
/*定义类对象*/
private GridView my_gridview;
private ImageView big_imageView;
private ImageAdapter myImageViewAdapter;
/*内部类，实现一个图片适配器*/
public class ImageAdapter extends BaseAdapter {
/*myContext为上下文*/
private Context myContext;
/*GridView用来加载图片的ImageView*/
private ImageView the_imageView;
// 这是图片资源ID的数组
private Integer[] mImageIds = {
               R.drawable.a, R.drawable.b,R.drawable.c, R.drawable.d,
               R.drawable.e, R.drawable.f,R.drawable.g, R.drawable.h,
               R.drawable.i, R.drawable.j,R.drawable.k, R.drawable.l,
               R.drawable.m, R.drawable.n,R.drawable.o, R.drawable.p
                };
/*构造方法*/
public ImageAdapter(Context myContext) {
// TODO Auto-generated constructor stub
this.myContext = myContext;
/*传入一个Context，本例中传入的是GridViewTest */
}
/*返回资源ID数组长度*/
@Override
public int getCount() {
// TODO Auto-generated method stub
return mImageIds.length;
}
/*得到Item*/
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
/*获取Items的ID*/
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}

//处理gridview的每个item
/*获取要显示的View对象*/
@Override
public View getView(int position,
View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
/*创建一个ImageView*/
the_imageView = new ImageView(myContext);
// 设置图像源于资源ID。
the_imageView.setImageResource(mImageIds[position]);
/*使ImageView与边界适应*/
the_imageView.setAdjustViewBounds(true);
/*设置背景图片的风格*/
the_imageView.setBackgroundResource(
&nb

补充：移动开发 , Android ,

Android GridView宫格视图 之 BaseAdapter

Android GridView宫格视图之 BaseAdapter