Android真正簡單的教程-第十二槍（ViewFlipper實現滑動效果）

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直接看代碼

1.MainActivity.java:

package org.yayun.demo;import android.app.Activity;import android.os.Bundle;import android.view.GestureDetector;import android.view.MotionEvent;import android.view.ViewGroup.LayoutParams;import android.view.animation.Animation;import android.view.animation.AnimationUtils;import android.widget.ImageView;import android.widget.ViewFlipper;public class MainActivity extends Activity implementsandroid.view.GestureDetector.OnGestureListener {private int[] imgs = { R.drawable.img1, R.drawable.img2, R.drawable.img3 };private GestureDetector gestureDetector;private ViewFlipper viewFlipper;private Activity mActivity;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);mActivity = this;viewFlipper = (ViewFlipper) findViewById(R.id.viewflipper);gestureDetector = new GestureDetector(this);//手勢監聽for (int i = 0; i < imgs.length; i++) { // 加入圖片源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); // 設定自己主動播放功能（點擊事件，前自己主動播放）viewFlipper.setFlipInterval(3000);//間隔3秒if (viewFlipper.isAutoStart() && !viewFlipper.isFlipping()) {viewFlipper.startFlipping();}}@Overridepublic boolean onTouchEvent(MotionEvent event) {// TODO Auto-generated method stubviewFlipper.stopFlipping(); // 點擊事件後。停止自己主動播放viewFlipper.setAutoStart(false);return gestureDetector.onTouchEvent(event); // 注冊手勢事件}public boolean onDown(MotionEvent arg0) {// TODO Auto-generated method stubreturn false;}public boolean onFling(MotionEvent e1, MotionEvent e2, float arg2,float arg3) {if (e2.getX() - e1.getX() > 120) { // 從左向右滑動（左進右出）Animation rInAnim = AnimationUtils.loadAnimation(mActivity,R.layout.push_right_in); // 向右滑動左側進入的漸層效果（alpha 0.1 -> 1.0）Animation rOutAnim = AnimationUtils.loadAnimation(mActivity,R.layout.push_right_out); // 向右滑動右側滑出的漸層效果（alpha 1.0 -> 0.1）viewFlipper.setInAnimation(rInAnim);viewFlipper.setOutAnimation(rOutAnim);viewFlipper.showPrevious();return true;} else if (e2.getX() - e1.getX() < -120) { // 從右向左滑動（右進左出）Animation lInAnim = AnimationUtils.loadAnimation(mActivity,R.layout.push_left_in); // 向左滑動左側進入的漸層效果（alpha 0.1 -> 1.0）Animation lOutAnim = AnimationUtils.loadAnimation(mActivity,R.layout.push_left_out); // 向左滑動右側滑出的漸層效果（alpha 1.0 -> 0.1）viewFlipper.setInAnimation(lInAnim);viewFlipper.setOutAnimation(lOutAnim);viewFlipper.showNext();return true;}return true;}public void onLongPress(MotionEvent arg0) {// TODO Auto-generated method stub}public boolean onScroll(MotionEvent arg0, MotionEvent arg1, float arg2,float arg3) {// TODO Auto-generated method stubreturn false;}public void onShowPress(MotionEvent arg0) {// TODO Auto-generated method stub}public boolean onSingleTapUp(MotionEvent arg0) {// TODO Auto-generated method stubreturn false;}}

2.active_main.xml:

<?
xml version="1.0" encoding="utf-8"?>  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"      android:layout_width="fill_parent"      android:layout_height="fill_parent"      android:orientation="vertical" >        <ViewFlipper          android:id="@+id/viewflipper"          android:layout_width="fill_parent"          android:layout_height="fill_parent"/>    </LinearLayout>  

以下看四個動畫檔案，非常easy.

1.push_left_in.xml

<?xml version="1.0" encoding="utf-8"?
>    <set xmlns:android="http://schemas.android.com/apk/res/android" >        <translate            android:duration="1500"            android:fromXDelta="100%p"            android:toXDelta="0" />  <!-- 位移   -->        <alpha            android:duration="1500"            android:fromAlpha="0.1"            android:toAlpha="1.0" /> <!-- 漸層    --></set> 

2.push_left_out.xml

<?xml version="1.0" encoding="utf-8"?>    <set xmlns:android="http://schemas.android.com/apk/res/android" >        <translate            android:duration="1500"            android:fromXDelta="0"            android:toXDelta="-100%p" />            <alpha            android:duration="1500"            android:fromAlpha="1.0"            android:toAlpha="0.1" />    </set>   

3.push_right_in.xml

<?
xml version="1.0" encoding="utf-8"?
>    <set xmlns:android="http://schemas.android.com/apk/res/android" >        <translate            android:duration="1500"            android:fromXDelta="-100%p"            android:toXDelta="0" />            <alpha            android:duration="1500"            android:fromAlpha="0.1"            android:toAlpha="1.0" />    </set>  

4.push_right_out.xml

<?xml version="1.0" encoding="utf-8"?
>    <set xmlns:android="http://schemas.android.com/apk/res/android" >        <translate            android:duration="1500"            android:fromXDelta="0"            android:toXDelta="100%p" />            <alpha            android:duration="1500"            android:fromAlpha="1.0"            android:toAlpha="0.1" />    </set>

執行實比例如以下：

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Android真正簡單的教程-第十二槍（ViewFlipper實現滑動效果）