android 实现左右滑动效果
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。为了方便大家理解,我们先来看一下效果图:
主要效果图如下图:
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:
<? xmlversion="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:
1. Alpha:渐变透明度动画效果
2. Scale:渐变尺寸伸缩动画效果
3. Translate:画面转换位置移动动画效果
4. Rotate:画面转换位置移动动画效果
push_left_in.xml文件中代码:
<? xmlversion="1.0"encoding="utf-8" ?><setxmlns:android="http://schemas.android.com/apk/res/android">
<translateandroid:fromXDelta="100%p"android:toXDelta="0"
android:duration="500"/>
<alphaandroid:fromAlpha="0.1"android:toAlpha="1.0"
android:duration="500"/>
</set>
push_left_out.xml文件中代码:
<? xmlversion="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:
<? xmlversion="1.0"encoding="utf-8" ?><setxmlns:android="http://schemas.android.com/apk/res/android">
<translateandroid:fromXDelta="-100%p"android:toXDelta="0"
android:duration="500"/>
<alphaandroid:fromAlpha="0.1"android:toAlpha="1.0"
android:duration="500"/>
</set>
push_right_out.xml文件中代码:
<? xmlversion="1.0"encoding="utf-8" ?><setxmlns:android="http://schemas.android.com/apk/res/android">
<translateandroid:fromXDelta="0"android:toXDelta="100%p"
android:duration="500"/>
<alphaandroid:fromAlpha="1.0"android:toAlpha="0.1"
android:duration="500"/>
</set>
如果大家想实现带指引效果的左右滑动,请访问博文:http://www.cnblogs.com/hanyonglu/archive/2012/04/07/2435589.html
如果想实现带渐显按钮的左右滑动效果,请访问博文:http://www.cnblogs.com/hanyonglu/archive/2012/02/13/2350171.html
下载地址:点击下载
最后,希望转载的朋友能够尊重作者的劳动成果,加上转载地址:http://www.cnblogs.com/hanyonglu/archive/2012/02/13/2349827.html谢谢。
结束。^_^
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