Android图片左右滑动 Android实现图片左右滑动效果
Healtheon 人气:0想了解Android实现图片左右滑动效果的相关内容吗,Healtheon在本文为您仔细讲解Android图片左右滑动的相关知识和一些Code实例,欢迎阅读和指正,我们先划重点:Android左右滑动切换,Android左右切换,Android左右滑动图片,下面大家一起来学习吧。
关于滑动效果,在Android中用得比较多,本示例实现的滑动效果是使用ViewFlipper来实现的,当然也可以使用其它的View来实现。接下来就让我们开始实现这种效果。
接下来我们看一下程序结构图:
MainActivity文件中代码:
package com.android.flip; import android.app.Activity; import android.os.Bundle; import android.view.GestureDetector; import android.view.MotionEvent; import android.view.View; import android.view.GestureDetector.OnGestureListener; import android.view.animation.AnimationUtils; import android.widget.ImageView; import android.widget.ViewFlipper; /** * Android实现左右滑动效果 * @Description: Android实现左右滑动效果 * @File: MainActivity.java * @Package com.android.flip * @Author Hanyonglu * @Date 2012-02-12 上午10:44:04 * @Version V1.0 */ public class MainActivity extends Activity implements OnGestureListener { private ViewFlipper flipper; private GestureDetector detector; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); detector = new GestureDetector(this); flipper = (ViewFlipper) this.findViewById(R.id.ViewFlipper1); flipper.addView(addImageView(R.drawable.one)); flipper.addView(addImageView(R.drawable.two)); flipper.addView(addImageView(R.drawable.three)); flipper.addView(addImageView(R.drawable.four)); flipper.addView(addImageView(R.drawable.five)); } private View addImageView(int id) { ImageView iv = new ImageView(this); iv.setImageResource(id); return iv; } @Override public boolean onTouchEvent(MotionEvent event) { // TODO Auto-generated method stub return this.detector.onTouchEvent(event); } @Override public boolean onDown(MotionEvent e) { // TODO Auto-generated method stub return false; } @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { if (e1.getX() - e2.getX() > 120) { this.flipper.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_in)); this.flipper.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_out)); this.flipper.showNext(); return true; } else if (e1.getX() - e2.getX() < -120) { this.flipper.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.push_right_in)); this.flipper.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.push_right_out)); this.flipper.showPrevious(); return true; } return false; } @Override public void onLongPress(MotionEvent e) { // TODO Auto-generated method stub } @Override public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { // TODO Auto-generated method stub return false; } @Override public void onShowPress(MotionEvent e) { // TODO Auto-generated method stub } @Override public boolean onSingleTapUp(MotionEvent e) { // TODO Auto-generated method stub return false; } }
布局界面相对比较简单,我们只需要加入ViewFlipper就可以,代码如下:
<?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" > <ViewFlipper android:id="@+id/ViewFlipper1" android:layout_width="fill_parent" android:layout_height="fill_parent"> </ViewFlipper> </LinearLayout>
为了使其滑动时有一定的特效,我们需要加入Animation效果,说到Animation,我们先看下如何在Android中实现自定义Animation。自定义的Animation是以XML格式定义的,定义好的XML文件存放在res/anim中。
一般的Animation有以下四种类型:
- Alpha:渐变透明度动画效果
- Scale:渐变尺寸伸缩动画效果
- Translate:画面转换位置移动动画效果
- Rotate:画面转换位置移动动画效果
push_left_in.xml文件中代码:
<?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android"> <translate android:fromXDelta="100%p" android:toXDelta="0" android:duration="500" /> <alpha android:fromAlpha="0.1" android:toAlpha="1.0" android:duration="500" /> </set> push_left_out.xml文件中代码: <?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android"> <translate android:fromXDelta="0" android:toXDelta="-100%p" android:duration="500" /> <alpha android:fromAlpha="1.0" android:toAlpha="0.1" android:duration="500" /> </set>
push_right_in.xml文件中代码:
<?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android"> <translate android:fromXDelta="-100%p" android:toXDelta="0" android:duration="500" /> <alpha android:fromAlpha="0.1" android:toAlpha="1.0" android:duration="500" /> </set>
push_right_out.xml文件中代码:
<?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android"> <translate android:fromXDelta="0" android:toXDelta="100%p" android:duration="500" /> <alpha android:fromAlpha="1.0" android:toAlpha="0.1" android:duration="500" /> </set>
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