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ViewPager实现多页面切换及动画效果安卓开发

1.Viewpager是个Android自带的View视图控件,要使用它,必须导入这个附加包android-support-v4.jar,如何导入到家必应搜索一下就知道了。

 

2.界面设计:

 

其实很简单就是一个简单页面,里面放一个ViewPager,

 

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    
    tools:context=".MainActivity" >
 
    <android.support.v4.view.ViewPager
        android:id="@+id/viewPager"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >
 
        <android.support.v4.view.PagerTabStrip
            android:id="@+id/pagertab"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="top"
            android:background="#8B00FF"
            android:textColor="#FFF" />
    </android.support.v4.view.ViewPager>
 
    <RelativeLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >
 
        <LinearLayout
            android:id="@+id/viewGroup"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_marginBottom="30dp"
            android:gravity="center_horizontal"
            android:orientation="horizontal" >
        </LinearLayout>
    </RelativeLayout>
 
</FrameLayout>

 

其次就是 5个页面,放在ViewPager里的,这里就随便举例一个页面源码:

 

<?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/guide02"
    android:gravity="center_horizontal"
    android:orientation="horizontal" >
   
    <ImageView
        android:id="@+id/translate1"
        android:layout_gravity="center"
        android:layout_width="96dp"
        android:layout_height="192dp"
        android:src="@drawable/translate1" />
    <ImageView
        android:id="@+id/translate2"
        android:layout_gravity="center"
        android:layout_width="96dp"
        android:layout_height="192dp"
        android:layout_marginLeft="5dp"
        android:src="@drawable/scale"
        android:visibility="gone" />
    <ImageView
        android:id="@+id/translate3"
        android:layout_gravity="center"
        android:layout_width="96dp"
        android:layout_height="192dp"
        android:layout_marginLeft="5dp"
        android:src="@drawable/translate2"
        android:visibility="gone" />
</LinearLayout>

 

该页面里的三个图片所对应的动画效果代码如下:

 

<translate
        android:duration="800"
        android:fromXDelta="-100%p"
   
         />
 
<translate
        android:duration="800"
        android:fromYDelta="-100%p"
        android:interpolator="@android:anim/bounce_interpolator"
   />
 
 
 <translate
        android:duration="800"
        android:fromXDelta="100%p"
   
         />

 

3.Java代码设计与实现:

 

(1)View等相关变量定义:

 

ViewPager viewPager;
    ArrayList<View> listViews;
    ViewGroup main, group;
    ImageView imageView;
    ImageView[] imageViews;
    ImageView imgv;
    Animation[] animations;
    Animation    animTranslate2;
    Animation    animTranslate3;
    List<String> listTitles ;

 

(2)变量初始化工作:

 

        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
        LayoutInflater inflater = getLayoutInflater();
        listViews = new ArrayList<View>();
        listViews.add(inflater.inflate(R.layout.item1, null));
        listViews.add(inflater.inflate(R.layout.item2, null));
        listViews.add(inflater.inflate(R.layout.item3, null));
        listViews.add(inflater.inflate(R.layout.item4, null));
        listViews.add(inflater.inflate(R.layout.item5, null));
         
        imageViews = new ImageView[listViews.size()];
        ViewGroup main = (ViewGroup) inflater.inflate(R.layout.main, null);
        // group是R.layou.main中的负责包裹小圆点的LinearLayout.
        ViewGroup group = (ViewGroup) main.findViewById(R.id.viewGroup);
 
        viewPager = (ViewPager) main.findViewById(R.id.viewPager);
 
        for (int i = 0; i < listViews.size(); i++) {
            imageView = new ImageView(MainActivity.this);
            imageView.setLayoutParams(new LayoutParams(60, 60));
            imageView.setPadding(10, 0, 10, 0);
            imageViews[i] = imageView;
            if (i == 0) {
                // 默认进入程序后第一张图片被选中;
                imageViews[i].setImageResource(R.drawable.guide_dot_white);
            } else {
                imageViews[i].setImageResource(R.drawable.guide_dot_black);
            }
            group.addView(imageView);
        }
 
        listTitles = new ArrayList<String>();
        listTitles.add("页面1");
        listTitles.add("页面2");
        listTitles.add("页面3");
        listTitles.add("页面4");
        listTitles.add("页面5");
        
        setContentView(main);
        
        viewPager.setAdapter(new MyAdapter(listTitles));
        viewPager.setOnPageChangeListener(new MyListener());

 

(3)动画初始化以及监听器设定:

 

        animations = new Animation[listViews.size()];
        animations[0]=AnimationUtils.loadAnimation(MainActivity.this, R.anim.scale);
        animations[1]=AnimationUtils.loadAnimation(MainActivity.this, R.anim.translate1);
        animations[2]=AnimationUtils.loadAnimation(MainActivity.this, R.anim.rotate);
        animations[3]=AnimationUtils.loadAnimation(MainActivity.this, R.anim.demo);
        
        
        animTranslate2=AnimationUtils.loadAnimation(MainActivity.this, R.anim.translate2);
        animTranslate3=AnimationUtils.loadAnimation(MainActivity.this, R.anim.translate3);
        animations[1].setAnimationListener(new AnimationListener() {
            
            @Override
            public void onAnimationStart(Animation arg0) {
                // TODO Auto-generated method stub
                listViews.get(1).findViewById(R.id.translate2).setVisibility(View.INVISIBLE);
                listViews.get(1).findViewById(R.id.translate3).setVisibility(View.INVISIBLE);
            }
            
            @Override
            public void onAnimationRepeat(Animation arg0) {
                // TODO Auto-generated method stub
                
            }
            
            @Override
            public void onAnimationEnd(Animation arg0) {
                // TODO Auto-generated method stub
            
                listViews.get(1).findViewById(R.id.translate2).setVisibility(View.VISIBLE);
                listViews.get(1).findViewById(R.id.translate2).startAnimation(animTranslate2);
            }
        });
        animTranslate2.setAnimationListener(new AnimationListener() {
            
            @Override
            public void onAnimationStart(Animation arg0) {
                // TODO Auto-generated method stub
                //list.get(1).findViewById(R.id.translate3).setVisibility(View.INVISIBLE);
            }
            
            @Override
            public void onAnimationRepeat(Animation arg0) {
                // TODO Auto-generated method stub
                
            }
            
            @Override
            public void onAnimationEnd(Animation arg0) {
                // TODO Auto-generated method stub
            
                listViews.get(1).findViewById(R.id.translate3).setVisibility(View.VISIBLE);
                listViews.get(1).findViewById(R.id.translate3).startAnimation(animTranslate3);
            }
        });

 

(4)ViewPager的自定义适配器:

 

        animations = new Animation[listViews.size()];
        animations[0]=AnimationUtils.loadAnimation(MainActivity.this, R.anim.scale);
        animations[1]=AnimationUtils.loadAnimation(MainActivity.this, R.anim.translate1);
        animations[2]=AnimationUtils.loadAnimation(MainActivity.this, R.anim.rotate);
        animations[3]=AnimationUtils.loadAnimation(MainActivity.this, R.anim.demo);
        
        animTranslate2=AnimationUtils.loadAnimation(MainActivity.this, R.anim.translate2);
        animTranslate3=AnimationUtils.loadAnimation(MainActivity.this, R.anim.translate3);
        animations[1].setAnimationListener(new AnimationListener() {
            
            @Override
            public void onAnimationStart(Animation arg0) {
                // TODO Auto-generated method stub
                listViews.get(1).findViewById(R.id.translate2).setVisibility(View.INVISIBLE);
                listViews.get(1).findViewById(R.id.translate3).setVisibility(View.INVISIBLE);
            }
            
            @Override
            public void onAnimationRepeat(Animation arg0) {
                // TODO Auto-generated method stub
                
            }
            
            @Override
            public void onAnimationEnd(Animation arg0) {
                // TODO Auto-generated method stub
            
                listViews.get(1).findViewById(R.id.translate2).setVisibility(View.VISIBLE);
                listViews.get(1).findViewById(R.id.translate2).startAnimation(animTranslate2);
            }
        });
        animTranslate2.setAnimationListener(new AnimationListener() {
            
            @Override
            public void onAnimationStart(Animation arg0) {
                // TODO Auto-generated method stub
                //list.get(1).findViewById(R.id.translate3).setVisibility(View.INVISIBLE);
            }
            
            @Override
            public void onAnimationRepeat(Animation arg0) {
                // TODO Auto-generated method stub
                
            }
            
            @Override
            public void onAnimationEnd(Animation arg0) {
                // TODO Auto-generated method stub
            
                listViews.get(1).findViewById(R.id.translate3).setVisibility(View.VISIBLE);
                listViews.get(1).findViewById(R.id.translate3).startAnimation(animTranslate3);
            }
        });

 

(5)实现页面切换动作监听:

 

class MyListener implements OnPageChangeListener {
 
        @Override
        public void onPageScrollStateChanged(int arg0) {
            // TODO Auto-generated method stub
            /*list.get(1).findViewById(R.id.translate1).setVisibility(View.INVISIBLE);
            list.get(1).findViewById(R.id.translate2).setVisibility(View.INVISIBLE);
            list.get(1).findViewById(R.id.translate3).setVisibility(View.INVISIBLE);*/
        }
 
        @Override
        public void onPageScrolled(int arg0, float arg1, int arg2) {
            // TODO Auto-generated method stub
 
        }
 
        @Override
        public void onPageSelected(int arg0) {
            Toast.makeText(MainActivity.this, ""+(arg0+1), Toast.LENGTH_SHORT).show();
            
            for (int i = 0; i < imageViews.length; i++) {
                imageViews[arg0].setImageResource(R.drawable.guide_dot_white);
                if (arg0 != i) {
                    imageViews[i].setImageResource(R.drawable.guide_dot_black);
                }
                
            }
            Log.v("viewpager", ""+arg0+1);
            if(arg0 != 4)
             playAnim(arg0);
        }
        
    }
    
    private void playAnim(final int n){
        switch(n){
        case 0:
            listViews.get(n).findViewById(R.id.scale).startAnimation(animations[n]);
            break;
        case 1:
            
            listViews.get(n).findViewById(R.id.translate1).startAnimation(animations[n]);
            
            break;
        case 2:
            listViews.get(n).findViewById(R.id.rotate).startAnimation(animations[n]);
            break;
        case 3:
            listViews.get(n).findViewById(R.id.demo).startAnimation(animations[n]);
            break;
        }
    }
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