Android中GridView(网格视图)效果源码（十五）

GridView(网格视图)是按照行列的方式来显示内容的，一般用于显示图片，图片等内容，比如实现九宫格图，用GridView是首选，也是最简单的。

GirdView的一些属性：

android:numColumns="auto_fit" --------列数设置为自动
android:columnWidth="90dp"，----------每列的宽度，也就是Item的宽度
android:stretchMode="columnWidth"------缩放与列宽大小同步
android:verticalSpacing="10dp"----------垂直边距
android:horizontalSpacing="10dp"-------水平边距

package com.itarchy.gridview;

import android.app.Activity;
import android.os.Bundle;
import android.widget.GridView;
/**
 * 
 * @E-mail: itarchy@163.com
 * @version 创建时间：2015-11-6下午6:17:50
 * @Des:
 */
public class MainActivity extends Activity {

	private GridView gridView;
	private MainAdapter mygvAdapter;
	private Integer[] mThumbIds = null;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		// 获取控件
		gridView = (GridView) this.findViewById(R.id.gridview);
		initDataSource();
		initAdapter();
	}

	// 1 初始化数据源
	private void initDataSource() {
		mThumbIds = new Integer[] { R.drawable.sample_2, R.drawable.sample_3,
				R.drawable.sample_4, R.drawable.sample_5, R.drawable.sample_6,
				R.drawable.sample_7, R.drawable.sample_0, R.drawable.sample_1,
				R.drawable.sample_2, R.drawable.sample_3, R.drawable.sample_4,
				R.drawable.sample_5, R.drawable.sample_6, R.drawable.sample_7,
				R.drawable.sample_0, R.drawable.sample_1, R.drawable.sample_2,
				R.drawable.sample_3, R.drawable.sample_4, R.drawable.sample_5,
				R.drawable.sample_6, R.drawable.sample_7 };
	}

	private void initAdapter() {

		mygvAdapter = new MainAdapter(this, mThumbIds);
		gridView.setAdapter(mygvAdapter);

	}
}

<?xml version="1.0" encoding="utf-8"?>
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/gridview"
    android:background="#ffbbbbbb"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:gravity="center"
    android:columnWidth="90dip"
    android:numColumns="auto_fit"
    android:stretchMode="columnWidth"/>

package com.itarchy.gridview;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;

public class MainAdapter extends BaseAdapter {

	private Context mContext;
	private Integer[] data;

	public MainAdapter(Context context, Integer[] data) {
		this.mContext = context;
		this.data = data;
	}

	@Override
	public int getCount() {

		return data.length;
	}

	@Override
	public Object getItem(int position) {

		return null;
	}

	@Override
	public long getItemId(int position) {

		return 0;
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		ViewHolder mViewHolder;
		if (convertView == null) {
			convertView = View.inflate(mContext, R.layout.gv_list_item, null);
			// 创建一个绑定对象
			mViewHolder = new ViewHolder();
			// 初始化控件
			mViewHolder.img = (ImageView) convertView.findViewById(R.id.img);
			// 绑定
			convertView.setTag(mViewHolder);
		} else {
			// 从绑定对戏里重新获取一个View
			mViewHolder = (ViewHolder) convertView.getTag();
		}
		// 赋值
		mViewHolder.img.setBackgroundResource(data[position]);
		return convertView;
	}
	static class ViewHolder {
		ImageView img;
	}

}

<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">

    <ImageView
        android:id="@+id/img"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_centerVertical="true"/>

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.itarchy.gridview"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.itarchy.gridview.MainActivity"
            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>

</manifest>