Android app引导页(背景图片切换加各个页面动画效果)

先看效果图:

转自：http://blog.csdn.net/lowprofile_coding/article/details/48037095

1.显示三个页面的Activity 用view pager去加载三个fragment实现,控制点点点的切换,监听view pager的切换,控制fragment动画的开始跟结束,重写了view pager,实现了背景图片的移动效果.

/**
 * 主Activity
 * @author ansen
 * @create time 2015-08-07
 */
public class KaKaLauncherActivity extends FragmentActivity {
	private GuideViewPager vPager;
	private List list = new ArrayList();
	private BaseFragmentAdapter adapter;

	private ImageView[] tips;
	private int currentSelect; 
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_luancher_main);
		
		//初始化点点点控件
		ViewGroup group = (ViewGroup)findViewById(R.id.viewGroup);
		tips = new ImageView[3];
		for (int i = 0; i < tips.length; i++) {
			ImageView imageView = new ImageView(this);
			imageView.setLayoutParams(new LayoutParams(10, 10));
			if (i == 0) {
				imageView.setBackgroundResource(R.drawable.page_indicator_focused);
			} else {
				imageView.setBackgroundResource(R.drawable.page_indicator_unfocused);
			}
			tips[i]=imageView;

			LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(new ViewGroup.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));
			layoutParams.leftMargin = 20;//设置点点点view的左边距
			layoutParams.rightMargin = 20;//设置点点点view的右边距
			group.addView(imageView,layoutParams);
		}
		
		//获取自定义viewpager 然后设置背景图片
		vPager = (GuideViewPager) findViewById(R.id.viewpager_launcher);
		vPager.setBackGroud(BitmapFactory.decodeResource(getResources(),R.drawable.bg_kaka_launcher));

		/**
		 * 初始化三个fragment  并且添加到list中
		 */
		RewardLauncherFragment rewardFragment = new RewardLauncherFragment();
		PrivateMessageLauncherFragment privateFragment = new PrivateMessageLauncherFragment();
		StereoscopicLauncherFragment stereoscopicFragment = new StereoscopicLauncherFragment();
		list.add(rewardFragment);
		list.add(privateFragment);
		list.add(stereoscopicFragment);

		adapter = new BaseFragmentAdapter(getSupportFragmentManager(),list);
		vPager.setAdapter(adapter);
		vPager.setOffscreenPageLimit(2);
		vPager.setCurrentItem(0);
		vPager.setOnPageChangeListener(changeListener);
	}
	
	/**
	 * 监听viewpager的移动
	 */
	OnPageChangeListener changeListener=new OnPageChangeListener() {
		@Override
		public void onPageSelected(int index) {
			setImageBackground(index);//改变点点点的切换效果
			LauncherBaseFragment fragment=list.get(index);
			
			list.get(currentSelect).stopAnimation();//停止前一个页面的动画
			fragment.startAnimation();//开启当前页面的动画
			
			currentSelect=index;
		}
		
		@Override
		public void onPageScrolled(int arg0, float arg1, int arg2) {}
		@Override
		public void onPageScrollStateChanged(int arg0) {}
	};
	
	/**
	 * 改变点点点的切换效果
	 * @param selectItems
	 */
	private void setImageBackground(int selectItems) {
		for (int i = 0; i < tips.length; i++) {
			if (i == selectItems) {
				tips[i].setBackgroundResource(R.drawable.page_indicator_focused);
			} else {
				tips[i].setBackgroundResource(R.drawable.page_indicator_unfocused);
			}
		}
	}
}

2.重写viewpager 在dispatchDraw方法中控制显示的背景图片区域,

/**
 * 重写ViewPager  主要做一个切换背景的功能
 * @author ansen
 * @create time 2015-08-07
 */
public class GuideViewPager extends ViewPager {
	private Bitmap bg;
	private Paint b = new Paint(1);
	
	public GuideViewPager(Context context) {
		super(context);
	}

	public GuideViewPager(Context context, AttributeSet attrs) {
		super(context, attrs);
	}

	@Override
	protected void dispatchDraw(Canvas canvas) {
		if (this.bg != null) {
			int width = this.bg.getWidth();
			int height = this.bg.getHeight();
			int count = getAdapter().getCount();
			int x = getScrollX();
			// 子View中背景图片需要显示的宽度，放大背景图或缩小背景图。
			int n = height * getWidth() / getHeight();
			
			/**
			 * (width - n) / (count - 1)表示除去显示第一个ViewPager页面用去的背景宽度，剩余的ViewPager需要显示的背景图片的宽度。
			 * getWidth()等于ViewPager一个页面的宽度，即手机屏幕宽度。在该计算中可以理解为滑动一个ViewPager页面需要滑动的像素值。
			 * ((width - n) / (count - 1)) /getWidth()也就表示ViewPager滑动一个像素时，背景图片滑动的宽度。
			 * x * ((width - n) / (count - 1)) /  getWidth()也就表示ViewPager滑动x个像素时，背景图片滑动的宽度。
			 * 背景图片滑动的宽度的宽度可以理解为背景图片滑动到达的位置。
			 */
			int w = x * ((width - n) / (count - 1)) / getWidth();
			canvas.drawBitmap(this.bg, new Rect(w, 0, n + w, height), new Rect( x, 0, x + getWidth(), getHeight()), this.b);
		}
		super.dispatchDraw(canvas);
	}
	
	public void setBackGroud(Bitmap paramBitmap) {
		this.bg = paramBitmap;
		this.b.setFilterBitmap(true);
	}
}

3.主体布局文件上面放一个自定义的viewpager 下面放一个显示点点的RelativeLayout

4.ViewPager适配器

/**
 * Viewpager适配器
 * @author apple
 *
 */
public class BaseFragmentAdapter extends FragmentStatePagerAdapter {
	private Listlist;
	public BaseFragmentAdapter(FragmentManager fm, List list) {
		super(fm);
		this.list = list;
	}

	public BaseFragmentAdapter(FragmentManager fm) {
		super(fm);
	}

	@Override
	public Fragment getItem(int arg0) {
		return list.get(arg0);
	}

	@Override
	public int getCount() {
		return list.size();
	}
}

5.Fragment抽象类有两个抽象方法,开启动画跟停止动画所有的Fragment都继承这个类 Viewpager切换的时候可以更好的控制每个Fragment开启动画,结束动画

[java]  view plain 
       copy 
      
 
 /**  
  * Fragment抽象类  
  * @author ansen  
  *   
  */   
 public abstract class LauncherBaseFragment extends Fragment{   
     public abstract void  startAnimation();   
     public abstract void  stopAnimation();   
 }   

6.打赏页Fragment 三个动画效果硬币向下移动动画+打赏图片缩放动画+改变打赏图片透明度然后隐藏图片

[java]  view plain 
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 /**  
  * 打赏页面  
  * @author ansen  
  * @create time 2015-08-07  
  */   
 public class RewardLauncherFragment extends LauncherBaseFragment{   
     private ImageView ivReward;   
     private ImageView ivGold;   
        
     private Bitmap goldBitmap;   
     private boolean started;//是否开启动画(ViewPage滑动时候给这个变量赋值)   
        
     @Override   
     public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {   
         View rooView=inflater.inflate(R.layout.fragment_reward_launcher, null);   
         ivGold=(ImageView) rooView.findViewById(R.id.iv_gold);   
         ivReward=(ImageView) rooView.findViewById(R.id.iv_reward);   
            
         //获取硬币的高度   
         goldBitmap=BitmapFactory.decodeResource(getActivity().getResources(),R.drawable.icon_gold);   
         startAnimation();   
         return rooView;   
     }   
        
     public void startAnimation(){   
         started=true;   
            
         //向下移动动画 硬币的高度*2+80      
         TranslateAnimation translateAnimation=new TranslateAnimation(0,0,0,goldBitmap.getHeight()*2+80);   
         translateAnimation.setDuration(500);   
         translateAnimation.setFillAfter(true);   
            
         ivGold.startAnimation(translateAnimation);   
         translateAnimation.setAnimationListener(new AnimationListener() {   
             @Override   
             public void onAnimationStart(Animation animation) {}   
             @Override   
             public void onAnimationEnd(Animation animation){   
                 if(started){   
                     ivReward.setVisibility(View.VISIBLE);   
                     //硬币移动动画结束开启缩放动画   
                     Animation anim=AnimationUtils.loadAnimation(getActivity(),R.anim.reward_launcher);     
                     ivReward.startAnimation(anim);   
                     anim.setAnimationListener(new AnimationListener(){   
                         @Override     
                         public void onAnimationStart(Animation animation) {}     
                         @Override     
                         public void onAnimationRepeat(Animation animation) {}     
                         @Override     
                         public void onAnimationEnd(Animation animation) {   
                                 //缩放动画结束 开启改变透明度动画   
                                 AlphaAnimation alphaAnimation=new AlphaAnimation(1,0);   
                                 alphaAnimation.setDuration(1000);   
                                 ivReward.startAnimation(alphaAnimation);   
                                 alphaAnimation.setAnimationListener(new AnimationListener() {   
                                     @Override   
                                     public void onAnimationStart(Animation animation) {}   
                                     @Override   
                                     public void onAnimationRepeat(Animation animation) {}   
                                     @Override   
                                     public void onAnimationEnd(Animation animation) {   
                                         //透明度动画结束隐藏图片   
                                         ivReward.setVisibility(View.GONE);   
                                     }   
                             });   
                         }   
                     });   
                 }   
             }   
             @Override   
             public void onAnimationRepeat(Animation animation) {}   
         });   
     }   
        
     @Override   
     public void stopAnimation(){   
         started=false;//结束动画时标示符设置为false   
         ivGold.clearAnimation();//清空view上的动画   
     }   
 }   

7.私信页面四个动画效果并且四个动画都相同,其实只要我们实现了一个,其他的基本都很容易了. 依次实现四个图片的放大然后还原

[java]  view plain 
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 /**  
  * 私信  
  * @author ansen  
  */   
 public class PrivateMessageLauncherFragment extends LauncherBaseFragment{   
     private ImageView ivLikeVideo,ivThinkReward,ivThisWeek,ivWatchMovie;   
        
     private Animation likeAnimation,thinkAnimation,watchAnimation,thisWeekAnimation;   
        
     private boolean started;//是否开启动画   
        
     @Override   
     public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {   
         View rooView=inflater.inflate(R.layout.fragment_private_message_launcher, null);   
            
         ivLikeVideo=(ImageView) rooView.findViewById(R.id.iv_private_message_like_video);   
         ivThinkReward=(ImageView) rooView.findViewById(R.id.iv_private_message_think_reward);   
         ivWatchMovie=(ImageView) rooView.findViewById(R.id.iv_private_message_watch_movie);   
         ivThisWeek=(ImageView) rooView.findViewById(R.id.private_message_this_week);   
         return rooView;   
     }   
        
     public void stopAnimation(){   
         //动画开启标示符设置成false      
         started=false;   
         /**  
          * 清空所有控件上的动画  
          */   
         ivLikeVideo.clearAnimation();   
         ivThinkReward.clearAnimation();   
         ivWatchMovie.clearAnimation();   
         ivThisWeek.clearAnimation();   
     }   
        
        
     public void startAnimation(){   
         started=true;   
            
         /**  
          * 每次开启动画前先隐藏控件  
          */   
         ivLikeVideo.setVisibility(View.GONE);   
         ivThinkReward.setVisibility(View.GONE);   
         ivWatchMovie.setVisibility(View.GONE);   
         ivThisWeek.setVisibility(View.GONE);   
            
         new Handler().postDelayed(new Runnable() {//延时0.5秒之后开启喜欢视频动画   
             @Override   
             public void run(){   
                 if(started)   
                     likeVideoAnimation();   
             }   
         },500);   
     }   
        
     /**  
      * 好喜欢你的视频  
      */   
     private void likeVideoAnimation(){   
         ivLikeVideo.setVisibility(View.VISIBLE);   
            
         likeAnimation = AnimationUtils.loadAnimation(getActivity(),R.anim.private_message_launcher);   
         ivLikeVideo.startAnimation(likeAnimation);//开启动画   
         likeAnimation.setAnimationListener(new AnimationListener(){     
             @Override     
             public void onAnimationStart(Animation animation) {}     
             @Override     
             public void onAnimationRepeat(Animation animation) {}     
             @Override     
             public void onAnimationEnd(Animation animation) {//监听动画结束   
                     if(started)   
                         thinkReward();   
             }     
         });    
     }   
        
     /**  
      * 谢谢你的打赏  
      */   
     private void thinkReward(){   
         ivThinkReward.setVisibility(View.VISIBLE);   
         thinkAnimation = AnimationUtils.loadAnimation(getActivity(),R.anim.private_message_launcher);   
         ivThinkReward.startAnimation(thinkAnimation);   
         thinkAnimation.setAnimationListener(new AnimationListener(){     
             @Override     
             public void onAnimationStart(Animation animation) {}     
             @Override     
             public void onAnimationRepeat(Animation animation) {}     
             @Override     
             public void onAnimationEnd(Animation animation) {   
                 if(started)   
                     watchMovie();   
             }     
         });    
     }   
        
     /**  
      * 一起看个电影呗  
      */   
     private void watchMovie(){   
         ivWatchMovie.setVisibility(View.VISIBLE);   
         watchAnimation = AnimationUtils.loadAnimation(getActivity(),R.anim.private_message_launcher);   
         ivWatchMovie.startAnimation(watchAnimation);   
         watchAnimation.setAnimationListener(new AnimationListener(){     
             @Override     
             public void onAnimationStart(Animation animation) {}     
             @Override     
             public void onAnimationRepeat(Animation animation) {}     
             @Override     
             public void onAnimationEnd(Animation animation) {   
                 if(started)   
                     thisWeek();   
             }     
         });    
     }   
        
     /**  
      * 好啊  这周末有空  
      */   
     private void thisWeek(){   
         ivThisWeek.setVisibility(View.VISIBLE);   
         thisWeekAnimation = AnimationUtils.loadAnimation(getActivity(),R.anim.private_message_launcher);     
         ivThisWeek.startAnimation(thisWeekAnimation);   
     }   
 }   

8.最后一个引导页就两个动画图片的放大跟缩小,其实用xml布局的话一个动画就能搞定,跟私信页面的动画差不多.小伙伴写的代码.这里换了一种方式.代码比较多.

[java]  view plain 
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 /**  
  * 最后一个  
  * @author apple  
  */   
 public class StereoscopicLauncherFragment extends LauncherBaseFragment implements OnClickListener{   
     private static final float ZOOM_MAX = 1.3f;   
     private static final  float ZOOM_MIN = 1.0f;   
        
     private ImageView imgView_immediate_experience;   
        
     @Override   
     public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {   
         View rooView=inflater.inflate(R.layout.fragment_stereoscopic_launcher, null);   
         imgView_immediate_experience=(ImageView) rooView.findViewById(R.id.imgView_immediate_experience);   
         imgView_immediate_experience.setOnClickListener(this);   
         return rooView;   
     }   
        
     public void playHeartbeatAnimation(){   
             /**  
              * 放大动画  
              */   
         AnimationSet animationSet = new AnimationSet(true);   
         animationSet.addAnimation(new ScaleAnimation(ZOOM_MIN, ZOOM_MAX, ZOOM_MIN, ZOOM_MAX, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,0.5f));   
         animationSet.addAnimation(new AlphaAnimation(1.0f, 0.8f));   
     
         animationSet.setDuration(500);   
         animationSet.setInterpolator(new AccelerateInterpolator());   
         animationSet.setFillAfter(true);   
     
         animationSet.setAnimationListener(new AnimationListener() {   
             @Override   
             public void onAnimationStart(Animation animation) {   
             }   
     
             @Override   
             public void onAnimationRepeat(Animation animation) {   
             }   
     
             @Override   
             public void onAnimationEnd(Animation animation) {   
                     /**  
                      * 缩小动画  
                      */   
                 AnimationSet animationSet = new AnimationSet(true);   
                 animationSet.addAnimation(new ScaleAnimation(ZOOM_MAX, ZOOM_MIN, ZOOM_MAX,ZOOM_MIN, Animation.RELATIVE_TO_SELF, 0.5f,Animation.RELATIVE_TO_SELF, 0.5f));   
                 animationSet.addAnimation(new AlphaAnimation(0.8f, 1.0f));   
                 animationSet.setDuration(600);   
                 animationSet.setInterpolator(new DecelerateInterpolator());   
                 animationSet.setFillAfter(false);   
                  // 实现心跳的View   
                 imgView_immediate_experience.startAnimation(animationSet);   
             }   
         });   
          // 实现心跳的View   
         imgView_immediate_experience.startAnimation(animationSet);   
     }    
    
     @Override   
     public void onClick(View v) {   
 //      Intent intent = new Intent();   
 //      intent.setClass(getActivity(),MainActivity.class);   
 //      startActivity(intent);   
 //      getActivity().finish();   
     }   
    
     @Override   
     public void startAnimation() {   
         playHeartbeatAnimation();   
     }   
    
     @Override   
     public void stopAnimation() {   
            
     }   
 }   

最后总结:以上就是三个引导页的核心代码了,还有一些布局文件,动画效果的布局文件我就不一一贴出来的,大家可以去下载我的源码,在这个过程中碰到的几个大的问题说明一下.

1.viewpager切换的时候要结束上个fragment的动画我是通过boolean变量去控制的

2.背景图片移动的效果之前自己走了很多弯路,后面在网上找了一个demo拿过来用了.因为大家都有开源精神所以这里省了很多功夫

3.图片放大缩小以前居然不知道一个xml动画布局就能搞定.之前一直想办法用两个动画实现

源码：http://download.csdn.net/detail/lowprofile_coding/9056143

Android app引导页(背景图片切换加各个页面动画效果)

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