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

先看效果圖:

1.顯示三個頁面的Activity ?用view pager去加載三個fragment實現,控制點點點的切換,監聽view pager的切換,控制fragment動畫的開始跟結束,重寫了view pager,實現了背景圖片的移動效果.

/*** 主Activity* @author ansen* @create time 2015-08-07*/ public class KaKaLauncherActivity extends FragmentActivity {private GuideViewPager vPager;private List<LauncherBaseFragment> list = new ArrayList<LauncherBaseFragment>();private BaseFragmentAdapter adapter;private ImageView[] tips;private int currentSelect; @Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_luancher_main);//初始化點點點控件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;//設置點點點view的左邊距layoutParams.rightMargin = 20;//設置點點點view的右邊距group.addView(imageView,layoutParams);}//獲取自定義viewpager 然后設置背景圖片vPager = (GuideViewPager) findViewById(R.id.viewpager_launcher);vPager.setBackGroud(BitmapFactory.decodeResource(getResources(),R.drawable.bg_kaka_launcher));/*** 初始化三個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);}/*** 監聽viewpager的移動*/OnPageChangeListener changeListener=new OnPageChangeListener() {@Overridepublic void onPageSelected(int index) {setImageBackground(index);//改變點點點的切換效果LauncherBaseFragment fragment=list.get(index);list.get(currentSelect).stopAnimation();//停止前一個頁面的動畫fragment.startAnimation();//開啟當前頁面的動畫currentSelect=index;}@Overridepublic void onPageScrolled(int arg0, float arg1, int arg2) {}@Overridepublic void onPageScrollStateChanged(int arg0) {}};/*** 改變點點點的切換效果* @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.重寫viewpager ? 在dispatchDraw方法中控制顯示的背景圖片區域,

/*** 重寫ViewPager 主要做一個切換背景的功能* @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);}@Overrideprotected 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中背景圖片需要顯示的寬度，放大背景圖或縮小背景圖。int n = height * getWidth() / getHeight();/*** (width - n) / (count - 1)表示除去顯示第一個ViewPager頁面用去的背景寬度，剩余的ViewPager需要顯示的背景圖片的寬度。* getWidth()等于ViewPager一個頁面的寬度，即手機屏幕寬度。在該計算中可以理解為滑動一個ViewPager頁面需要滑動的像素值。* ((width - n) / (count - 1)) /getWidth()也就表示ViewPager滑動一個像素時，背景圖片滑動的寬度。* x * ((width - n) / (count - 1)) / getWidth()也就表示ViewPager滑動x個像素時，背景圖片滑動的寬度。* 背景圖片滑動的寬度的寬度可以理解為背景圖片滑動到達的位置。*/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.主體布局文件 ?上面放一個自定義的viewpager ?下面放一個顯示點點的RelativeLayout

<RelativeLayout 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" ><com.example.view.GuideViewPagerandroid:id="@+id/viewpager_launcher"android:layout_width="match_parent"android:layout_height="match_parent" /><RelativeLayoutandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:orientation="vertical" ><LinearLayoutandroid: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" /></RelativeLayout></RelativeLayout> 4.ViewPager適配器

/*** Viewpager適配器* @author apple**/ public class BaseFragmentAdapter extends FragmentStatePagerAdapter {private List<LauncherBaseFragment>list;public BaseFragmentAdapter(FragmentManager fm, List<LauncherBaseFragment> list) {super(fm);this.list = list;}public BaseFragmentAdapter(FragmentManager fm) {super(fm);}@Overridepublic Fragment getItem(int arg0) {return list.get(arg0);}@Overridepublic int getCount() {return list.size();} } 5.Fragment抽象類 有兩個抽象方法,開啟動畫跟停止動畫 ?所有的Fragment都繼承這個類 ?Viewpager切換的時候可以更好的控制每個Fragment開啟動畫,結束動畫

/*** Fragment抽象類* @author ansen* */ public abstract class LauncherBaseFragment extends Fragment{public abstract void startAnimation();public abstract void stopAnimation(); } 6.打賞頁Fragment ?三個動畫效果 ?硬幣向下移動動畫+打賞圖片縮放動畫+改變打賞圖片透明度然后隱藏圖片

/*** 打賞頁面* @author ansen* @create time 2015-08-07*/ public class RewardLauncherFragment extends LauncherBaseFragment{private ImageView ivReward;private ImageView ivGold;private Bitmap goldBitmap;private boolean started;//是否開啟動畫(ViewPage滑動時候給這個變量賦值)@Overridepublic 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);//獲取硬幣的高度goldBitmap=BitmapFactory.decodeResource(getActivity().getResources(),R.drawable.icon_gold);startAnimation();return rooView;}public void startAnimation(){started=true;//向下移動動畫 硬幣的高度*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() {@Overridepublic void onAnimationStart(Animation animation) {}@Overridepublic void onAnimationEnd(Animation animation){if(started){ivReward.setVisibility(View.VISIBLE);//硬幣移動動畫結束開啟縮放動畫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) {//縮放動畫結束 開啟改變透明度動畫AlphaAnimation alphaAnimation=new AlphaAnimation(1,0);alphaAnimation.setDuration(1000);ivReward.startAnimation(alphaAnimation);alphaAnimation.setAnimationListener(new AnimationListener() {@Overridepublic void onAnimationStart(Animation animation) {}@Overridepublic void onAnimationRepeat(Animation animation) {}@Overridepublic void onAnimationEnd(Animation animation) {//透明度動畫結束隱藏圖片ivReward.setVisibility(View.GONE);}});}});}}@Overridepublic void onAnimationRepeat(Animation animation) {}});}@Overridepublic void stopAnimation(){started=false;//結束動畫時標示符設置為falseivGold.clearAnimation();//清空view上的動畫} } 7.私信頁面 ? 四個動畫效果 ? 并且四個動畫都相同,其實只要我們實現了一個,其他的基本都很容易了. ? 依次實現四個圖片的放大然后還原

/*** 私信* @author ansen*/ public class PrivateMessageLauncherFragment extends LauncherBaseFragment{private ImageView ivLikeVideo,ivThinkReward,ivThisWeek,ivWatchMovie;private Animation likeAnimation,thinkAnimation,watchAnimation,thisWeekAnimation;private boolean started;//是否開啟動畫@Overridepublic 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(){//動畫開啟標示符設置成false started=false;/*** 清空所有控件上的動畫*/ivLikeVideo.clearAnimation();ivThinkReward.clearAnimation();ivWatchMovie.clearAnimation();ivThisWeek.clearAnimation();}public void startAnimation(){started=true;/*** 每次開啟動畫前先隱藏控件*/ivLikeVideo.setVisibility(View.GONE);ivThinkReward.setVisibility(View.GONE);ivWatchMovie.setVisibility(View.GONE);ivThisWeek.setVisibility(View.GONE);new Handler().postDelayed(new Runnable() {//延時0.5秒之后開啟喜歡視頻動畫@Overridepublic void run(){if(started)likeVideoAnimation();}},500);}/*** 好喜歡你的視頻*/private void likeVideoAnimation(){ivLikeVideo.setVisibility(View.VISIBLE);likeAnimation = AnimationUtils.loadAnimation(getActivity(),R.anim.private_message_launcher);ivLikeVideo.startAnimation(likeAnimation);//開啟動畫likeAnimation.setAnimationListener(new AnimationListener(){ @Override public void onAnimationStart(Animation animation) {} @Override public void onAnimationRepeat(Animation animation) {} @Override public void onAnimationEnd(Animation animation) {//監聽動畫結束if(started)thinkReward();} }); }/*** 謝謝你的打賞*/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();} }); }/*** 一起看個電影唄*/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 這周末有空*/private void thisWeek(){ivThisWeek.setVisibility(View.VISIBLE);thisWeekAnimation = AnimationUtils.loadAnimation(getActivity(),R.anim.private_message_launcher); ivThisWeek.startAnimation(thisWeekAnimation);} } 8.最后一個引導頁 ?就兩個動畫 ?圖片的放大跟縮小,其實用xml布局的話一個動畫就能搞定,跟私信頁面的動畫差不多.小伙伴寫的代碼.這里換了一種方式.代碼比較多.

/*** 最后一個* @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;@Overridepublic 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(){/*** 放大動畫*/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() {@Overridepublic void onAnimationStart(Animation animation) {}@Overridepublic void onAnimationRepeat(Animation animation) {}@Overridepublic void onAnimationEnd(Animation animation) {/*** 縮小動畫*/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);// 實現心跳的ViewimgView_immediate_experience.startAnimation(animationSet);}});// 實現心跳的ViewimgView_immediate_experience.startAnimation(animationSet);} @Overridepublic void onClick(View v) { // Intent intent = new Intent(); // intent.setClass(getActivity(),MainActivity.class); // startActivity(intent); // getActivity().finish();}@Overridepublic void startAnimation() {playHeartbeatAnimation();}@Overridepublic void stopAnimation() {} }

最后總結:以上就是三個引導頁的核心代碼了,還有一些布局文件,動畫效果的布局文件我就不一一貼出來的,大家可以去下載我的源碼,在這個過程中碰到的幾個大的問題說明一下.

1.viewpager切換的時候要結束上個fragment的動畫 ? 我是通過boolean變量去控制的

2.背景圖片移動的效果 ? ?之前自己走了很多彎路,后面在網上找了一個demo拿過來用了.因為大家都有開源精神所以這里省了很多功夫

3.圖片放大縮小以前居然不知道一個xml動畫布局就能搞定.之前一直想辦法用兩個動畫實現

點擊源碼下載

總結

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