第五篇 ImageSwitcher篇

直奔主题~！

结构如图：

main.xml代码:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical" android:layout_width="fill_parent"
	android:layout_height="fill_parent" android:gravity="center">
	<ImageSwitcher android:id="@+id/is"
		android:layout_width="fill_parent" android:layout_height="200dip"></ImageSwitcher>
	<LinearLayout android:layout_width="fill_parent"
		android:id="@+id/linearLayout1" android:layout_height="wrap_content"
		android:gravity="center">
		<Button android:text="上一页" android:id="@+id/up_btn"
			android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
		<Button android:text="下一页" android:id="@+id/next_btn"
			android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
	</LinearLayout>

</LinearLayout>

Control_ImageSwitcherActivity.java代码:

public class Control_ImageSwitcherActivity extends Activity {
	
	ImageSwitcher is;
	Button next_btn;
	Button up_btn;
	int[] imggroup;
	int index=0;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        findAll();
        bind();
    }
    
    public void findAll()
    {
    	is=(ImageSwitcher) this.findViewById(R.id.is);
    	next_btn=(Button) this.findViewById(R.id.next_btn);
    	up_btn=(Button) this.findViewById(R.id.up_btn);
    }
    
    public void bind()
    {
    	imggroup=new int[]{R.raw.jwc1,R.raw.jwc2,R.raw.jwc3,R.raw.jwc4,R.raw.jwc5};
    	next_btn.setOnClickListener(mylistener);
    	up_btn.setOnClickListener(mylistener);
    	is.setFactory(new ViewFactory() {
			
    		   		
			public View makeView() {
				// TODO Auto-generated method stub
			//	return null;
				ImageView iv=new ImageView(Control_ImageSwitcherActivity.this);
				iv.setLayoutParams(new  ImageSwitcher.LayoutParams(100, 100));
				return iv;
			}
		});
    	is.setBackgroundResource(imggroup[index]);
    }
    
    
    
    private View.OnClickListener mylistener =new OnClickListener() {
		
		public void onClick(View v) {
			// TODO Auto-generated method stub
			switch(v.getId())
			{
			case R.id.up_btn:
				if(index>=1)
				{
				   index--;
				   is.setBackgroundResource(imggroup[index]);
				}
				else
				{
				  Toast.makeText(Control_ImageSwitcherActivity.this, "已经到了第一页", Toast.LENGTH_LONG).show();
				}
				break;
			case R.id.next_btn:
				if(index<(imggroup.length-1))
				{
				   index++;
				   is.setBackgroundResource(imggroup[index]);
				}
				else
				{
				  Toast.makeText(Control_ImageSwitcherActivity.this, "已经到了最后一页", Toast.LENGTH_LONG).show();
				}
				break;
				default:
					break;
			}
		}
	};
}