安卓学习-界面-ui-Gallery

和spinner类似

这个是水平排列的，spinner是垂直的

这个一般是通过滑动来选择，spinner是点击

属性	方法	说明
android:animationDuration	setAnimationDuration(int animationDurationMillis)	设置布局变化时动画的转换所需的时间 不知道有什么作用
android:gravity	setGravity(int gravity)	对齐方式
android:spacing	setSpacing(int spacing)	2图片之间的间隔
android:unselectedAlpha	setUnselectedAlpha(float unselectedAlpha)	没选中的图片的透明度0-1

例子1

item.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true" />
</RelativeLayout>

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Gallery
        android:id="@+id/gallery1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
         />

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</LinearLayout>

MainActivity.java

public class MainActivity extends Activity {

    int[] images=new int[]{
            R.drawable.pic1,R.drawable.pic2,R.drawable.pic3,R.drawable.pic4,R.drawable.pic5,
            R.drawable.pic6,R.drawable.pic7,R.drawable.pic8,R.drawable.pic9,R.drawable.pic10
    };
    ImageView iv1;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        iv1=(ImageView)findViewById(R.id.imageView1);
        
        List<Map<String, Object>> items = new ArrayList<Map<String, Object>>();
        for(int i=0;i<10;i++){
            Map<String, Object> map1 = new HashMap<String, Object>();
            map1.put("pic", images[i]);
            items.add(map1);
        }
        
        SimpleAdapter sa = new SimpleAdapter(MainActivity.this, items,
                R.layout.item, new String[] { "pic"}, new int[] {
                        R.id.imageView1});
        Gallery gallery=(Gallery)findViewById(R.id.gallery1);
        
        gallery.setOnItemSelectedListener(new OnItemSelectedListener() {

            @Override
            public void onItemSelected(AdapterView<?> parent, View view,
                    int position, long id) {
                
                iv1.setImageResource(images[position]);
                
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {
                // TODO 自动生成的方法存根
                
            }
            
        });

        gallery.setAdapter(sa);
        
    
    }
}