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();
    }
  }
}

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