android_viewFlipper(一)

需要注意的地方已在代码中表明

package cn.com.sxp;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ViewFlipper;

public class ViewFlipperActivity extends Activity {
	// 该例子显示，一个viewFlipper加载了三个线性布局，每个线性布局包含一个button，一个imageView。
	// 这三个线性布局不是同时显示，是轮番显示，一个线性布局按照动画效果向左离去，另一个线性布局从右而来
	private ViewFlipper viewFlipper = null;
	Button btnOne = null, btnTwo = null, btnThree = null;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		btnOne = (Button) findViewById(R.id.btnOne);
		viewFlipper = (ViewFlipper) findViewById(R.id.vf);
		btnOne.setOnClickListener(new View.OnClickListener() {
			public void onClick(View view) {
				// 在layout中定义的属性，也可以在代码中指定
				// setInAnimation():
				// Specifies the animation 动画 used to animate a View that enters the screen.
				// Parameters
				// context  The application's environment. 
				// resourceID  The resource id of the animation. 
				// 
				// Return the context of the single, global Application object of the current process. This 
				// generally should only be used if you need a Context whose lifecycle is separate from the 
				// current context, that is tied to the lifetime of the process rather than the current 
				// component. 
				// viewFlipper.setInAnimation(getApplicationContext(), R.anim.push_left_in);
				
				// setOutAnimation():
				// Specifies the animation used to animate a View that exit the screen.
				// viewFlipper.setOutAnimation(getApplicationContext(), R.anim.push_left_out);
				
				// setPersistentDrawingCache():
				// Indicates what types of drawing caches should be kept in memory after they have been 
				// created.
				// viewFlipper.setPersistentDrawingCache(ViewGroup.PERSISTENT_ALL_CACHES);
				
				// setFlipInterval()；
				// How long to wait before flipping to the next view
				// viewFlipper.setFlipInterval(1000);
				// showNext()
				// Manually shows the next child. 
				// viewFlipper.showNext();
				// 调用下面的函数将会循环显示mViewFlipper内的所有View。
				// mViewFlipper.startFlipping();
			}
		});

		btnTwo = (Button) findViewById(R.id.btnTwo);
		btnTwo.setOnClickListener(new View.OnClickListener() {
			public void onClick(View view) {
				viewFlipper.showNext();
			}

		});
		
		btnThree = (Button) findViewById(R.id.btnThree);
		btnThree.setOnClickListener(new View.OnClickListener() {
			public void onClick(View view) {
				viewFlipper.showNext();
			}

		});

	}
}

　　运行效果如下;

点击按钮，即可看到左右换的图片。