关于Android软件欢迎界面滑屏的设计

//WelcomeActivity.java 文件

package viv.junowin;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.LayoutInflater;
import android.view.View;
import android.view.GestureDetector.OnGestureListener;
import android.view.animation.AnimationUtils;
import android.view.MotionEvent;
import android.widget.ViewFlipper;

public class WelcomeActivity extends Activity implements OnGestureListener {

 // 实现拖动类效果属性声明
 private ViewFlipper flipper;
 private GestureDetector detector;

 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);

  // 注册一个用于手势识别的类
  detector = new GestureDetector(this);
  flipper = (ViewFlipper) this.findViewById(R.id.Viewflipper);

  flipper.addView(addView(R.layout.welc_1));
  flipper.addView(addView(R.layout.welc_2));
  flipper.addView(addView(R.layout.welc_3));

 }

 private View addView(int layout) {
  LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  View view = inflater.inflate(layout, null);
  return view;
 }

 public boolean onTouchEvent(MotionEvent event) {
  return this.detector.onTouchEvent(event);
 }

 // 用户轻触触摸屏，由1个MotionEvent ACTION_DOWN触发
 public boolean onDown(MotionEvent arg0) {
  // TODO Auto-generated method stub
  //Toast.makeText(this, "onDown", Toast.LENGTH_SHORT).show();
  return false;
 }

 // 用户按下触摸屏、快速移动后松开，由1个MotionEvent ACTION_DOWN, 多个ACTION_MOVE, 1个ACTION_UP触发
 public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
   float velocityY) {
  // 参数解释：
  // e1：第1个ACTION_DOWN MotionEvent
  // e2：最后一个ACTION_MOVE MotionEvent
  // velocityX：X轴上的移动速度，像素/秒
  // velocityY：Y轴上的移动速度，像素/秒
  // 触发条件 ：
  // X轴的坐标位移大于FLING_MIN_DISTANCE，且移动速度大于FLING_MIN_VELOCITY个像素/秒

  if (e1.getX() - e2.getX() > 120) {
   // Fling left
   //Toast.makeText(this, "Fling Left", Toast.LENGTH_SHORT).show();

   this.flipper.setInAnimation(AnimationUtils.loadAnimation(this,
     R.anim.push_left_in));
   this.flipper.setOutAnimation(AnimationUtils.loadAnimation(this,
     R.anim.push_left_out));
   this.flipper.showNext();
   return true;
  } else if (e1.getX() - e2.getX() < -120) {
   // Fling right
   //Toast.makeText(this, "Fling Right", Toast.LENGTH_SHORT).show();

   this.flipper.setInAnimation(AnimationUtils.loadAnimation(this,
     R.anim.push_right_in));
   this.flipper.setOutAnimation(AnimationUtils.loadAnimation(this,
     R.anim.push_right_out));
   this.flipper.showPrevious();
   return true;
  }
  return false;
 }

 // 用户长按触摸屏，由多个MotionEvent ACTION_DOWN触发
 public void onLongPress(MotionEvent arg0) {
  // TODO Auto-generated method stub

 }

 // 用户按下触摸屏，并拖动，由1个MotionEvent ACTION_DOWN, 多个ACTION_MOVE触发
 public boolean onScroll(MotionEvent arg0, MotionEvent arg1, float arg2,
   float arg3) {
  // TODO Auto-generated method stub
  return false;
 }

 // 用户轻触触摸屏，尚未松开或拖动，由一个1个MotionEvent ACTION_DOWN触发
 public void onShowPress(MotionEvent e) {
  // TODO Auto-generated method stub

 }

 // 用户（轻触触摸屏后）松开，由一个1个MotionEvent ACTION_UP触发
 public boolean onSingleTapUp(MotionEvent e) {
  // TODO Auto-generated method stub
  return false;
 }
}

 

//push_left_in.xml

<?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="0.1"
  android:toAlpha="1.0"
  android:duration="500" />
</set>

//push_left_out.xml

<?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="0.1"
  android:duration="500" />
</set>

//push_right_in.xml

<?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="0.1"
  android:toAlpha="1.0"
  android:duration="500" />
</set>

//push_right_out.xml

<?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="0.1"
  android:duration="500" />
</set>

//drawable-hdpi 下有背景图片的资源文件

 

//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" >
    </ViewFlipper>

</LinearLayout>

 

//welc_1.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/bg1"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:text="欢迎使用！"
        android:textSize="25dp" />

</LinearLayout>