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:

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<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() {@Overridepublic 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;}@Overridepublic void onPageScrolled(int arg0, float arg1, int arg2) {}@Overridepublic 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);}@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

<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.GuideViewPager        android:id="@+id/viewpager_launcher"        android:layout_width="match_parent"        android:layout_height="match_parent" />    <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" />    </RelativeLayout></RelativeLayout>

4.ViewPager适配器

/** * Viewpager适配器 * @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)@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);//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() {@Overridepublic void onAnimationStart(Animation animation) {}@Overridepublic 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() {@Overridepublic void onAnimationStart(Animation animation) {}@Overridepublic void onAnimationRepeat(Animation animation) {}@Overridepublic void onAnimationEnd(Animation animation) {//透明度动画结束隐藏图片ivReward.setVisibility(View.GONE);}});                }            });}}@Overridepublic void onAnimationRepeat(Animation animation) {}});}@Overridepublic void stopAnimation(){started=false;//结束动画时标示符设置为falseivGold.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@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(){//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@Overridepublic 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;    @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);    } @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