ch010 Android(安卓)GridView

--------------------------------------------Layout activity_main.xml--------------------------

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

xmlns:tools="http://schemas.android.com/tools"

android:id="@+id/LinearLayout1"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical" >

<GridView

android:id="@+id/gv"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:numColumns="5" >

GridView>

LinearLayout>

--------------------------------------------Layout grid_items.xml-----------------------------

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

xmlns:tools="http://schemas.android.com/tools"

android:id="@+id/RelativeLayout1"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical" >

<ImageView

android:id="@+id/image"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:src="@drawable/ic_launcher" />

RelativeLayout>

--------------------------------------------MainActivity.java-----------------------------------

package com.ch10;

import android.app.Activity;

import android.os.Bundle;

import android.widget.GridView;

/**

* 项目名称：com.ch10

* 类名称：MainActivity

* 类描述： GridView、自定义适配器

* 创建人：方勇

* 创建时间：2012-11-15 下午2:38:16

public class MainActivity extends Activity {

private GridView gridView;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

findViews();

setAdapter();

}

/* 初始化UI */

private void findViews() {

gridView = (GridView) findViewById(R.id.gv);

}

/* 设置GridView适配器 */

private void setAdapter() {

gridView.setAdapter(new MyAdapter(this));

}

--------------------------------------------MyAdapter.java------------------------------------

package com.ch10;

import android.content.Context;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.GridView;

import android.widget.ImageView;

/**

* 项目名称：com.ch10

* 类名称：MyAdapter

* 类描述：自定义适配器

* 创建人：方勇

* 创建时间：2012-11-15 下午2:34:03

public class MyAdapter extends BaseAdapter {

/* 上下文 */

private Context mcontext;

private LayoutInflater layoutInflater;

/* 图像ID数组 */

private Integer[] images = { R.drawable.flag000, R.drawable.flag001, R.drawable.flag002, R.drawable.flag003,

R.drawable.flag004, R.drawable.flag005, R.drawable.flag006, R.drawable.flag007, R.drawable.flag008,

R.drawable.flag009, R.drawable.flag010, R.drawable.flag011, R.drawable.flag012, R.drawable.flag013,

R.drawable.flag014, R.drawable.flag015, R.drawable.flag016, R.drawable.flag017, R.drawable.flag018,

R.drawable.flag019, R.drawable.flag020, R.drawable.flag021, R.drawable.flag022, R.drawable.flag023,

R.drawable.flag024, R.drawable.flag025, R.drawable.flag026, R.drawable.flag027, R.drawable.flag028,

R.drawable.flag029, R.drawable.flag030, R.drawable.flag031, R.drawable.flag032, R.drawable.flag033,

R.drawable.flag034, R.drawable.flag035, R.drawable.flag036, R.drawable.flag037, R.drawable.flag038,

R.drawable.flag039, R.drawable.flag040, R.drawable.flag041, R.drawable.flag042, R.drawable.flag043,

R.drawable.flag044, R.drawable.flag045, R.drawable.flag046, R.drawable.flag047, R.drawable.flag048,

R.drawable.flag049, R.drawable.flag050, R.drawable.flag051, R.drawable.flag052, R.drawable.flag053,

R.drawable.flag054, R.drawable.flag055, R.drawable.flag056 };

public MyAdapter(Context context) {

super();

this.mcontext = context;

layoutInflater = LayoutInflater.from(mcontext);

}

/* Item个数,不设置这个getView方法无法执行 */

@Override

public int getCount() {

return images.length;

}

@Override

public Object getItem(int position) {

return position;

}

@Override

public long getItemId(int position) {

return position;

}

/**

* Item视图

* position 所在的位置

* convertView ImageView对象，第一屏时为空需实例化ImageView对象

* parent 所属视图组,默认一般设置为NULL

@Override

public View getView(int position, View convertView, ViewGroup parent) {

ImageView image = null;

/* 第一屏时,初始化所有的ImageView对象 */

if (null == convertView) {

/* 获取列表项视图,这里是一个相对布局 */

View itemView = layoutInflater.inflate(R.layout.grid_items, null);

/* 实例化所有的ImageView */

image = (ImageView) itemView.findViewById(R.id.image);

} else {// 滚动GridView时触发

image = (ImageView) convertView;

}

/* 指定图片 */

image.setImageResource(images[position]);

/* 设置图片大小 */

image.setLayoutParams(new GridView.LayoutParams(40, 40));

/** Options for scaling the bounds of an image to the bounds of this view. */

image.setScaleType(ImageView.ScaleType.FIT_XY);

return image;

}

--------------------------------------------效果图 GridView------------------------------------

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