android图片滑动

package jmpt.gallery;

import java.util.Arrays;

import android.os.Bundle;

import android.app.Activity;

import android.view.GestureDetector;

import android.view.Menu;

import android.view.MotionEvent;

import android.view.View;

import android.view.ViewGroup;

import youtParams;

import android.view.animation.Animation;

import android.view.animation.AnimationUtils;

import android.widget.BaseAdapter;

import android.widget.Gallery;

import android.widget.ImageView;

import android.widget.ViewFlipper;

public class MainActivity extends Activity implements

android.view.GestureDetector.OnGestureListener {

private int[] imgs = { R.drawable.p1, R.drawable.p2, R.drawable.p3 };

private GestureDetector gestureDetector = null;

private ViewFlipper viewFlipper = null;

private Activity mActivity = null;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(yout.activity_main);

mActivity = this;

viewFlipper = (ViewFlipper) findViewById(R.id.viewflipper);

gestureDetector = new GestureDetector(this); // 声明检测手势事件

for (int i = 0; i < imgs.length; i++) { // 添加图片源

ImageView iv = new ImageView(this);

iv.setImageResource(imgs[i]);

iv.setScaleType(ImageView.ScaleType.FIT_XY);

viewFlipper.addView(iv, new

LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));

}

viewFlipper.setAutoStart(true); // 设置自动播放功能（点击事件，前自动播放）

viewFlipper.setFlipInterval(3000);

if(viewFlipper.isAutoStart() && !viewFlipper.isFlipping()){

viewFlipper.startFlipping();

}

}

@Override

public boolean onTouchEvent(MotionEvent event) {

viewFlipper.stopFlipping(); // 点击事件后，停止自动播放

viewFlipper.setAutoStart(false);

return gestureDetector.onTouchEvent(event); // 注册手势事件

}

public boolean onFling1(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {

if (e2.getX() - e1.getX() > 120) { // 从左向右滑动（左进右出）

overridePendingTransition(android.R.anim.slide_in_left,android.

R.anim.slide_out_right); // 向右滑动左侧进入的渐变效果（alpha 0.1 -> 1.0）

//Animation rOutAnim = AnimationUtils.loadAnimation(mActivity, R.anim.push_right_out); // 向右滑动右侧滑出的渐变效果（alpha 1.0 -> 0.1）

// viewFlipper.setInAnimation(rInAnim);

//viewFlipper.setOutAnimation(rOutAnim);

viewFlipper.showPrevious();

return true;

} else if (e2.getX() - e1.getX() < -120) { // 从右向左滑动（右进左出）

overridePendingTransition(android.R.anim.slide_out_right,android.

R.anim.slide_in_left); // 向左滑动左侧进入的渐变效果（alpha 0.1 -> 1.0）

//Animation lOutAnim = AnimationUtils.loadAnimation(mActivity, R.anim.push_left_out); // 向左滑动右侧滑出的渐变效果（alpha 1.0 -> 0.1）

//viewFlipper.setInAnimation(lInAnim);

// viewFlipper.setOutAnimation(lOutAnim);

viewFlipper.showNext();

return true;

}

return true;

}

@Override

public String toString() {

return "MainActivity [imgs=" + Arrays.toString(imgs)

+ ", gestureDetector=" + gestureDetector + ",