安卓高级控件3之Gallery(画廊)

Gallery是一种过时的高级控件

用Gallery实现了图片的切换，其效果图如下：

XML代码如下：

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1. <?xml version="1.0" encoding="utf-8"?>  
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
3.     android:orientation="vertical" android:layout_width="match_parent"  
4.     android:layout_height="match_parent">  
5.   
6.     <Gallery  
7.         android:layout_width="match_parent"  
8.         android:layout_height="match_parent"  
9.         android:id="@+id/g_gallery_image"></Gallery>  
10.   
11. </LinearLayout>  

Java代码如下：

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1. public class GalleryActivity extends AppCompatActivity {  
2.   
3.     private Gallery g_gallery_image;  
4.     private int images[]={R.drawable.one,R.drawable.two,R.drawable.three,R.drawable.four,R.drawable.five,R.drawable.six,R.drawable.seven};  
5.   
6.     @Override  
7.     protected void onCreate(@Nullable Bundle savedInstanceState) {  
8.         super.onCreate(savedInstanceState);  
9.         setContentView(R.layout.galleryactivity);  
10.         g_gallery_image = (Gallery) findViewById(R.id.g_gallery_image);  
11.         g_gallery_image.setAdapter(new MyAdapter());  
12.   
13.   
14.     }  
15.   
16.     class MyAdapter extends BaseAdapter{  
17.   
18.         @Override  
19.         public int getCount() {  
20.             return images.length;  
21.         }  
22.   
23.         @Override  
24.         public Object getItem(int position) {  
25.             return images[position];  
26.         }  
27.   
28.         @Override  
29.         public long getItemId(int position) {  
30.             return position;  
31.         }  
32.   
33.         @Override  
34.         public View getView(int position, View convertView, ViewGroup parent) {  
35.             ImageView imageView=new ImageView(GalleryActivity.this);  
36.             //给imageview设置宽和高  
37.             Gallery.LayoutParams layoutParams=new Gallery.LayoutParams(600,600);  
38.             imageView.setLayoutParams(layoutParams);  
39.   
40.             imageView.setImageResource(images[position]);  
41.             return imageView;  
42.         }  
43.     }  
44. }