本文實例講述了Android使用ViewFlipper和GestrueDetector共同實現滑屏效果。分享給大家供大家參考，具體如下：
關于GestureDetector的相關知識，前面已經介紹過了，不懂的大家可以去了解一下。
1.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:background="@drawable/bg" android:orientation="vertical" > <ViewFlipper android:id="@+id/viewFlipper1" android:layout_width="fill_parent" android:layout_height="fill_parent" android:persistentDrawingCache="animation" android:flipInterval="1000" android:inAnimation="@anim/push_left_in" android:outAnimation="@anim/push_left_out" > <include android:id="@+id/lay1" layout="@layout/layout1"/> <include android:id="@+id/lay2" layout="@layout/layout2"/> </ViewFlipper></LinearLayout>
注：layout1和layout2 布局很簡單，就是有一個textview和一個button，就不在這里寫出了。其中包含了兩個特效xml文件，放在res/anim下
1.push_left_in
<?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="0.0" android:toAlpha="1.0" android:duration="500" /></set>
2 push_left_out
<?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="0.0" android:duration="500" /></set>
主類：
package com.wj.gesture;import android.app.Activity;import android.os.Bundle;import android.view.GestureDetector;import android.view.GestureDetector.OnDoubleTapListener;import android.view.GestureDetector.OnGestureListener;import android.view.MotionEvent;import android.view.View;import android.view.View.OnClickListener;import android.view.View.OnTouchListener;import android.view.animation.AccelerateInterpolator;import android.view.animation.Animation;import android.view.animation.TranslateAnimation;import android.widget.Button;import android.widget.TextView;import android.widget.Toast;import android.widget.ViewFlipper;public class GestureDetectorTest extends Activity implements OnClickListener, OnTouchListener,OnGestureListener,OnDoubleTapListener{ GestureDetector gestureDetector; private Button next = null,up = null; private ViewFlipper flipper = null; private static final int FLING_MIN_DISTANCE = 100; private static final int FLING_MIN_VELOCITY = 200; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); initview(); setListener(); } private void initview(){ gestureDetector = new GestureDetector(this); next = (Button)this.findViewById(R.id.button1); up = (Button)this.findViewById(R.id.button2); next.setOnClickListener(this); up.setOnClickListener(this); flipper = (ViewFlipper)this.findViewById(R.id.viewFlipper1); flipper.setLongClickable(true); } private void setListener(){ flipper.setOnTouchListener(this); } @Override public boolean onTouch(View v, MotionEvent event) { //Toast.makeText(this, "ontouch", 1000).show(); return gestureDetector.onTouchEvent(event); } @Override public boolean onDown(MotionEvent e) { // 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; } @Override public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { return false; } @Override public void onLongPress(MotionEvent e) { // TODO Auto-generated method stub } @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { if (e1.getX()-e2.getX()>FLING_MIN_DISTANCE&&Math.abs(velocityX)>FLING_MIN_VELOCITY) { flipper.setInAnimation(inFromRightAnimation()); flipper.setOutAnimation(outToLeftAnimation()); flipper.showNext(); }else if (e2.getX()-e1.getX()>FLING_MIN_DISTANCE&&Math.abs(velocityX) > FLING_MIN_VELOCITY) { flipper.setInAnimation(inFromLeftAnimation()); flipper.setOutAnimation(outToRightAnimation()); flipper.showPrevious(); } return false; } protected Animation inFromRightAnimation() { Animation inFromRight = new TranslateAnimation( Animation.RELATIVE_TO_PARENT, +1.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f); inFromRight.setDuration(500); inFromRight.setInterpolator(new AccelerateInterpolator()); return inFromRight; } protected Animation outToLeftAnimation() { Animation outtoLeft = new TranslateAnimation( Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, -1.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f); outtoLeft.setDuration(500); outtoLeft.setInterpolator(new AccelerateInterpolator()); return outtoLeft; } protected Animation inFromLeftAnimation() { Animation inFromLeft = new TranslateAnimation( Animation.RELATIVE_TO_PARENT, -1.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f); inFromLeft.setDuration(500); inFromLeft.setInterpolator(new AccelerateInterpolator()); return inFromLeft; } protected Animation outToRightAnimation() { Animation outtoRight = new TranslateAnimation( Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, +1.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f); outtoRight.setDuration(500); outtoRight.setInterpolator(new AccelerateInterpolator()); return outtoRight; } @Override public boolean onSingleTapConfirmed(MotionEvent e) { // TODO Auto-generated method stub return false; } @Override public boolean onDoubleTap(MotionEvent e) { // TODO Auto-generated method stub return false; } @Override public boolean onDoubleTapEvent(MotionEvent e) { // TODO Auto-generated method stub return false; } @Override public void onClick(View v) { if (v==next) { flipper.showNext(); }else{ flipper.showPrevious(); } }}希望本文所述對大家Android程序設計有所幫助。
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