Android之ViewPager显示应用新特性

        我们都知道，很多应用在安装后第一次使用都会有一个新特性显示，一个好的新特性显示，将给客户带来更好的体验，因此，当我们做一个应用的时候，不能忽视这个问题，不得不佩服微信在这方面做得很不错。今天我就来模仿微信新特性的显示，做一个小应用。

        源码下载地址：http://download.csdn.net/detail/weidi1989/4562605

 

废话不多说，先上效果图：

      

最后一张，增加了一个开门的动画效果：

下面是主要的类结构：

 

LoginActivity代码：

package com.way.viewpager;import java.util.ArrayList;import java.util.List;import java.util.Timer;import java.util.TimerTask;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.support.v4.view.ViewPager;import android.support.v4.view.ViewPager.OnPageChangeListener;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.view.animation.Animation;import android.view.animation.AnimationUtils;import android.view.animation.Animation.AnimationListener;import android.view.Window;import android.widget.ImageView;/** *  * @author way *  */public class LoginActivity extends Activity {private static final int ISNEW = 0x001;// 是否为private static final int COMPLETE = 0x002;// 新特性显示完毕private Context mContext = this;private DotMarks mDotMarks;private ImageView ivLeftImage,ivRightImage;private Handler handler = new Handler() {public void handleMessage(android.os.Message msg) {switch (msg.what) {case ISNEW:// if (WhatIsNewUtils.isFirstUse(LoginActivity.this))// {//如果是第一次使用该应用init();// 保存标记，下一次打开程序WhatIsNewUtils.isFirstUse(LoginActivity.this)返回的是falseWhatIsNewUtils.saveFirstUseFlag(LoginActivity.this);// }else{// setContentView(R.layout.activity_main);// }break;case COMPLETE:View mainView = LayoutInflater.from(mContext).inflate(R.layout.activity_main, null);setContentView(mainView);Animation enterAnim = AnimationUtils.loadAnimation(mContext, R.anim.main_activity_enter_anim);enterAnim.setFillAfter(true);mainView.startAnimation(enterAnim);break;default:break;}}};@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);requestWindowFeature(Window.FEATURE_NO_TITLE);setContentView(R.layout.login);new Timer().schedule(new TimerTask() {@Overridepublic void run() {Message msg = Message.obtain();msg.what = ISNEW;handler.sendMessage(msg);}}, 2000);}/** * 初始化新特性界面 */private void init() {LayoutInflater layoutInflater = LayoutInflater.from(mContext);View what_is_new = layoutInflater.inflate(R.layout.what_is_new, null);View pageOne = layoutInflater.inflate(R.layout.layout1, null);View pageTwo = layoutInflater.inflate(R.layout.layout2, null);View pageThree = layoutInflater.inflate(R.layout.layout3, null);ivLeftImage = (ImageView)pageThree.findViewById(R.id.iv_left_image01);ivRightImage = (ImageView)pageThree.findViewById(R.id.iv_left_image02);ViewPager viewPager = (ViewPager) what_is_new.findViewById(R.id.view_pager);List<View> viewItems = new ArrayList<View>();viewItems.add(pageOne);viewItems.add(pageTwo);viewItems.add(pageThree);viewPager.setAdapter(new WhatIsNewAdapter(viewItems));mDotMarks = (DotMarks) what_is_new.findViewById(R.id.dot_marks);/** * 翻页监听事件，用于更新索引小图片 */viewPager.setOnPageChangeListener(new OnPageChangeListener() {/** * 根据ViewPager的页面的变化来实时更新索引小图标 * */public void onPageSelected(int arg0) {mDotMarks.updateMark(arg0);// 更新}public void onPageScrolled(int arg0, float arg1, int arg2) {// TODO Auto-generated method stub}public void onPageScrollStateChanged(int arg0) {// TODO Auto-generated method stub}});/** * 最后一个View添加点击事件，用于切换视图 */pageThree.setOnClickListener(new OnClickListener() {public void onClick(View v) {mDotMarks.setVisibility(View.INVISIBLE);startAnimation();//开始动画}});this.setContentView(what_is_new);}/** * 动画 */private void startAnimation(){Animation leftAnim = AnimationUtils.loadAnimation(mContext, R.anim.slide_left_anim);Animation rightAnim = AnimationUtils.loadAnimation(mContext, R.anim.slide_right_anim);//final Animation fadeAnim = AnimationUtils.loadAnimation(mContext, R.anim.fade_anim);leftAnim.setFillAfter(true);rightAnim.setFillAfter(true);rightAnim.setAnimationListener(new AnimationListener() {public void onAnimationStart(Animation animation) {//mDotMarks.startAnimation(fadeAnim);}public void onAnimationRepeat(Animation animation) {}public void onAnimationEnd(Animation animation) {//动画结束Message msg = handler.obtainMessage();msg.what = COMPLETE;handler.sendMessage(msg);}});ivLeftImage.startAnimation(leftAnim);ivRightImage.startAnimation(rightAnim);}}

自定义DotMarks，就是下面三个小圆点，模拟翻页效果：

package com.way.viewpager;import android.content.Context;import android.graphics.drawable.Drawable;import android.util.AttributeSet;import android.view.LayoutInflater;import android.view.View;import android.widget.ImageView;import android.widget.LinearLayout;/** *  * @author way * */public class DotMarks extends LinearLayout {private ImageView mark_one, mark_two, mark_three;//三个小点图片private Drawable guide_focus = getResources().getDrawable(R.drawable.guide_focus);//焦点图片资源private Drawable guide_default = getResources().getDrawable(R.drawable.guide_default);//非焦点图片资源public DotMarks(Context context) {super(context);init(context);}public DotMarks(Context context, AttributeSet attrs) {super(context, attrs);init(context);}/** * 初始化 * @param context * 上下文对象 */private void init(Context context) {LayoutInflater layoutInflater = LayoutInflater.from(context);View dotmarks = layoutInflater.inflate(R.layout.dot_marks, null);this.addView(dotmarks);mark_one = (ImageView) dotmarks.findViewById(R.id.dot_mark1);mark_two = (ImageView) dotmarks.findViewById(R.id.dot_mark2);mark_three = (ImageView) dotmarks.findViewById(R.id.dot_mark3);//设置一个默认值mark_one.setImageResource(R.drawable.guide_focus);mark_two.setImageResource(R.drawable.guide_default);mark_three.setImageResource(R.drawable.guide_default);}/** *  * 根据传递进来的页面的索引切换小图标的显示 *  * */public void updateMark(int index) {switch (index) {case 0:mark_one.setImageDrawable(guide_focus);mark_two.setImageDrawable(guide_default);mark_three.setImageDrawable(guide_default);break;case 1:mark_one.setImageDrawable(guide_default);mark_two.setImageDrawable(guide_focus);mark_three.setImageDrawable(guide_default);break;case 2:mark_one.setImageDrawable(guide_default);mark_two.setImageDrawable(guide_default);mark_three.setImageDrawable(guide_focus);break;default:break;}}}

新特性适配器WhatIsNewAdapter：

package com.way.viewpager;import java.util.List;import android.os.Parcelable;import android.support.v4.view.PagerAdapter;import android.support.v4.view.ViewPager;import android.view.View;/** *  * @author way * */public class WhatIsNewAdapter extends PagerAdapter {public List<View> mListViews;public WhatIsNewAdapter(List<View> mListViews) {this.mListViews = mListViews;}@Overridepublic void destroyItem(View arg0, int arg1, Object arg2) {((ViewPager) arg0).removeView(mListViews.get(arg1));}@Overridepublic void finishUpdate(View arg0) {}@Overridepublic int getCount() {return mListViews.size();}@Overridepublic Object instantiateItem(View arg0, int arg1) {((ViewPager) arg0).addView(mListViews.get(arg1), 0);return mListViews.get(arg1);}@Overridepublic boolean isViewFromObject(View arg0, Object arg1) {return arg0 == (arg1);}@Overridepublic void restoreState(Parcelable arg0, ClassLoader arg1) {}@Overridepublic Parcelable saveState() {return null;}@Overridepublic void startUpdate(View arg0) {}}

工具类WhatIsNewUtils，用来判断用户是否第一次使用该app：

package com.way.viewpager;import android.app.Activity;import android.content.Context;import android.content.SharedPreferences;/** *  * @author way * */public class WhatIsNewUtils {private static String WHAT_IS_NEW_PRE_NAME = "what_is_new_pre_name";private static String FIRST_USE_FLAG = "first_use_flag"; /**  *       * 判断是否是第一次使用该应用程序      *       * */    public static boolean isFirstUse(Context context)    {    SharedPreferences sharedPreferences = context.getSharedPreferences(WHAT_IS_NEW_PRE_NAME, Activity.MODE_PRIVATE);        boolean flag = sharedPreferences.getBoolean(FIRST_USE_FLAG, true);        return flag;    }        /**     *      *保存第一次使用的信息     *      * */    public static void saveFirstUseFlag(Context context)    {    SharedPreferences sharedPreferences = context.getSharedPreferences(WHAT_IS_NEW_PRE_NAME, Activity.MODE_PRIVATE);        SharedPreferences.Editor editor = sharedPreferences.edit();        editor.putBoolean(FIRST_USE_FLAG, false);        editor.commit();    }    }

新特性的主布局文件what_is_new.xml：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="fill_parent"    android:layout_height="fill_parent" >    <android.support.v4.view.ViewPager        android:id="@+id/view_pager"        android:layout_width="fill_parent"        android:layout_height="fill_parent" />    <com.way.viewpager.DotMarks        android:id="@+id/dot_marks"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentBottom="true"        android:layout_centerHorizontal="true"        android:paddingBottom="50dp" /></RelativeLayout>

三个小圆点的布局文件dot_marks.xml：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="horizontal" >    <ImageView        android:id="@+id/dot_mark1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/guide_default" />    <ImageView        android:id="@+id/dot_mark2"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/guide_default" />    <ImageView        android:id="@+id/dot_mark3"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/guide_default" /></LinearLayout>

还有其他一些动画效果跟布局的文件，我就不贴出来了。