Android之app引导页(背景图片切换加各个页面动画效果)

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

先看效果图:

Android之app引导页(背景图片切换加各个页面动画效果)_第1张图片

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

/**
 * 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

/**
 * 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

/**
 * 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.

/**
 * 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

点击源码下载






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