Android开发中GridView用法示例

Android开发中GridView⽤法⽰例
本⽂实例讲述了Android开发中GridView⽤法。

分享给⼤家供⼤家参考，具体如下：
Android的GridView控件⽤于把⼀系列的空间组织成⼀个⼆维的⽹格显⽰出来，应⽤的⽐较多的就是组合图⽚显⽰。

下⾯我就详细讲⼀个例⼦。

⾸先写⼀个类继承BaseAdapter
1. Java代码
package com.yarin.android.Examples_04_19;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
public class ImageAdapter extends BaseAdapter
{
// 定义Context
private Context mContext;
// 定义整型数组即图⽚源
private Integer[] mImageIds =
{
R.drawable.img1,
R.drawable.img2,
R.drawable.img3,
R.drawable.img4,
R.drawable.img5,
R.drawable.img6,
R.drawable.img7,
R.drawable.img8,
R.drawable.img1,
};
public ImageAdapter(Context c)
{
mContext = c;
}
// 获取图⽚的个数
public int getCount()
{
return mImageIds.length;
}
// 获取图⽚在库中的位置
public Object getItem(int position)
{
return position;
}
// 获取图⽚ID
public long getItemId(int position)
{
return position;
}
public View getView(int position, View convertView, ViewGroup parent)
{
ImageView imageView;
if (convertView == null)
{
// 给ImageView设置资源
imageView = new ImageView(mContext);
// 设置布局图⽚120×120显⽰
imageView.setLayoutParams(new youtParams(85, 85));
// 设置显⽰⽐例类型
imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
}
else
{
imageView = (ImageView) convertView;
}
imageView.setImageResource(mImageIds[position]);
return imageView;
}
}
2. Java代码
package com.yarin.android.Examples_04_19;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
public class Activity01 extends Activity
{
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(yout.main);
//取得GridView对象
GridView gridview = (GridView) findViewById(R.id.gridview);
//添加元素给gridview
gridview.setAdapter(new ImageAdapter(this));
// 设置Gallery的背景
gridview.setBackgroundResource(R.drawable.bg0);
//事件监听
gridview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id)
{
Toast.makeText(Activity01.this, "你选择了" + (position + 1) + " 号图⽚", Toast.LENGTH_SHORT).show();
}
});
}
}
3. XML代码
<?xml version="1.0" encoding="utf-8"?>
<GridView xmlns:android="/apk/res/android"
android:id="@+id/gridview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:numColumns="auto_fit"
android:verticalSpacing="10dp"
android:horizontalSpacing="10dp"
android:columnWidth="90dp"
android:stretchMode="columnWidth"
android:gravity="center"
/>
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