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。
