Android使用ViewFlipper和GestrueDetector共同实现滑屏效果实例

本文实例讲述了Android使用ViewFlipper和GestrueDetector共同实现滑屏效果。分享给大家供大家参考，具体如下：

关于GestureDetector的相关知识，前面已经介绍过了，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 布局很简单，就是有一个textview和一个button，就不在这里写出了。其中包含了两个特效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>

主类：

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();
   }
 }
}

希望本文所述对大家Android程序设计有所帮助。