package xiaosi.ViewFlipper;
import android.app.Activity;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.GestureDetector.OnGestureListener;
import android.view.MotionEvent;
import android.view.ViewGroup.LayoutParams;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;
import android.widget.ViewFlipper;
public class ViewFlipperActivity extends Activity implements OnGestureListener
{
/** Called when the activity is first created. */
private int[] imageID = { R.drawable.a, R.drawable.b, R.drawable.c,
R.drawable.d, R.drawable.e, R.drawable.f, R.drawable.g,
R.drawable.h };
private ViewFlipper viewFlipper = null;
private GestureDetector gestureDetector = null;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
viewFlipper = (ViewFlipper) findViewById(R.id.viewflipper);
// 生成GestureDetector对象,用于检测手势事件
gestureDetector = new GestureDetector(this);
// 添加用于切换的图片
for (int i = 0; i < imageID.length; i++)
{
// 定义一个ImageView对象
ImageView image = new ImageView(this);
image.setImageResource(imageID[i]);
// 充满父控件
image.setScaleType(ImageView.ScaleType.FIT_XY);
// 添加到viewFlipper中
viewFlipper.addView(image, new LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
}
}
public boolean onDown(MotionEvent arg0)
{
return false;
}
public boolean onFling(MotionEvent arg0, MotionEvent arg1, float arg2,
float arg3)
{
//对手指滑动的距离进行了计算,如果滑动距离大于120像素,就做切换动作,否则不做任何切换动作。
// 从左向右滑动
if (arg0.getX() - arg1.getX() > 120)
{
// 添加动画
this.viewFlipper.setInAnimation(AnimationUtils.loadAnimation(this,
R.anim.push_left_in));
this.viewFlipper.setOutAnimation(AnimationUtils.loadAnimation(this,
R.anim.push_left_out));
this.viewFlipper.showNext();
return true;
}// 从右向左滑动
else if (arg0.getX() - arg1.getX() < -120)
{
this.viewFlipper.setInAnimation(AnimationUtils.loadAnimation(this,
R.anim.push_right_in));
this.viewFlipper.setOutAnimation(AnimationUtils.loadAnimation(this,
R.anim.push_right_out));
this.viewFlipper.showPrevious();
return true;
}
return true;
}
public void onLongPress(MotionEvent e)
{}
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
float distanceY)
{
return false;
}
public void onShowPress(MotionEvent e)
{}
public boolean onSingleTapUp(MotionEvent e)
{
return false;
}
@Override
public boolean onTouchEvent(MotionEvent event)
{
return this.gestureDetector.onTouchEvent(event);
}
}