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Android GridView控件 使用

2012-07-22 13:45 375 查看
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BaseAdapt






代码片段(3)

[代码] [Java]代码

01
package
com.yarin.android.Examples_04_19;
02
03
import
android.content.Context;
04
import
android.view.View;
05
import
android.view.ViewGroup;
06
import
android.widget.BaseAdapter;
07
import
android.widget.GridView;
08
import
android.widget.ImageView;
09
10
public
class
ImageAdapter
extends
BaseAdapter
11
{
12
// 定义Context
13
private
 
Context mContext;
14
// 定义整型数组 即图片源
15
private
 
Integer[]   mImageIds   =
16
{
17
R.drawable.img1,
18
R.drawable.img2,
19
R.drawable.img3,
20
R.drawable.img4,
21
R.drawable.img5,
22
R.drawable.img6,
23
R.drawable.img7,
24
R.drawable.img8,
25
R.drawable.img1,
26
};
27
28
public
 
ImageAdapter(Context c)
29
{
30
mContext = c;
31
}
32
33
// 获取图片的个数
34
public
 
int
 
getCount()
35
{
36
return
 
mImageIds.length;
37
}
38
39
// 获取图片在库中的位置
40
public
 
Object getItem(
int
 
position)
41
{
42
return
 
position;
43
}
44
45
46
// 获取图片ID
47
public
 
long
 
getItemId(
int
 
position)
48
{
49
return
 
position;
50
}
51
52
53
public
 
View getView(
int
 
position,View convertView,ViewGroup parent)
54
{
55
ImageView imageView;
56
if
 
(convertView ==
null
)
57
{
58
// 给ImageView设置资源
59
imageView =
new
 
ImageView(mContext);
60
// 设置布局 图片120×120显示
61
imageView.setLayoutParams(
new
 
GridView.LayoutParams(
85
,
85
));
62
// 设置显示比例类型
63
imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
64
}
65
else
66
{
67
imageView =(ImageView) convertView;
68
}
69
70
imageView.setImageResource(mImageIds[position]);
71
return
 
imageView;
72
}
73
74
}
[代码] [Java]代码
01
package
 
com.yarin.android.Examples_04_19;
02
03
import
 
android.app.Activity;
04
import
 
android.os.Bundle;
05
import
 
android.view.View;
06
import
 
android.widget.AdapterView;
07
import
 
android.widget.GridView;
08
import
 
android.widget.Toast;
09
import
 
android.widget.AdapterView.OnItemClickListener;
10
11
public
 
class
 
Activity01
extends
 
Activity
12
{
13
/** Called when the activity is first created. */
14
@Override
15
public
 
void
 
onCreate(Bundle savedInstanceState)
16
{
17
super
.onCreate(savedInstanceState);
18
setContentView(R.layout.main);
19
20
//取得GridView对象
21
GridView gridview = (GridView) findViewById(R.id.gridview);
22
//添加元素给gridview
23
gridview.setAdapter(
new
 
ImageAdapter(
this
));
24
25
// 设置Gallery的背景
26
gridview.setBackgroundResource(R.drawable.bg0);
27
28
//事件监听
29
gridview.setOnItemClickListener(
new
 
OnItemClickListener() {
30
public
 
void
 
onItemClick(AdapterView<?> parent,View v,
int
 
position,
long
 
id)
31
{
32
Toast.makeText(Activity01.
this
,
"你选择了"
 
+ (position +
1
) +
" 号图片"
,Toast.LENGTH_SHORT).show();
33
}
34
});
35
}
36
}
[代码] [XML]代码
view source 
   

   
  print 
  ? 
  
 
 
  
  
01
<?
xml
 
version
=
"1.0"
 
encoding
=
"utf-8"
?>
02
<
GridView
 
xmlns:android
=
"http://schemas.android.com/apk/res/android"
03
android:id
=
"@+id/gridview"
04
android:layout_width
=
"fill_parent"
05
android:layout_height
=
"fill_parent"
06
android:numColumns
=
"auto_fit"
07
android:verticalSpacing
=
"10dp"
08
android:horizontalSpacing
=
"10dp"
09
android:columnWidth
=
"90dp"
10
android:stretchMode
=
"columnWidth"
11
android:gravity
=
"center"
12
/>

                                            

                                        

                        
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