【Android】首次进入应用时加载引导界面

参考文章：

【1】http://blog.csdn.net/wsscy2004/article/details/7611529

【2】http://www.androidlearner.net/android-use-viewflow-lift-right-slide.html

这个不同于上一篇文章【Android】每个Activity中加入引导界面 （每个Activity动态加载ImageView的方式）。这个引导界面是在初次进入应用时，加载引导页面（采用Activity的方式），进入应用后，不再需要提供引导。

功能需求：首次进入应用时加载引导界面

思路：

1、首次进入，怎么判断？查看SharedPreferences中某个字段

2、基本上每个应用都有个进入实际功能是的动画加载页面，我们可以在该Activity中加入判断，看是否需要跳转到引导Activity

3、引导界面，采用现在比较主流的方式：左右滑动加载；小圆点提示；在最后一个页面，点击button，进入功能界面

实现功能：左右手势滑屏

底部小圆点随当前显示页跳动

浮动按钮显示。当触屏事件发生显示，否则就渐渐消失

先转个文章：http://blog.csdn.net/feng88724/article/details/6973662

第一种： ViewFlipper + GestureDetector

第二种： ActivityGroup +   GestureDetector

第三种： ViewPager  (Android3.0+)

第四种： ViewFlow (开源项目)

当你需要在一系列不确定数目的view中滑动时，可以考虑使用ViewFlow。如果你的view数目确定，你应该使用Fragments 或兼容库里的ViewPager 。

综合考虑代码复杂度以及以及加载的引导view个数可确定性，我们就采用第三种方案ViewPager吧。

好了，上代码。

（1）修改应用的动画加载页面SplashActivity.java

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package com.example.guidepagetest2;   import android.app.Activity; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.os.Handler; import android.os.Message;   /**  * 功能：使用ViewPager实现初次进入应用时的引导页  *  * (1)判断是否是首次加载应用--采取读取SharedPreferences的方法  * (2)是，则进入引导activity；否，则进入MainActivity  * (3)5s后执行(2)操作  *  * @author sz082093  *  */ public class SplashActivity extends Activity {       @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_splash);                   boolean mFirst = isFirstEnter(SplashActivity.this,SplashActivity.this.getClass().getName());         if(mFirst)             mHandler.sendEmptyMessageDelayed(SWITCH_GUIDACTIVITY,5000);         else             mHandler.sendEmptyMessageDelayed(SWITCH_MAINACTIVITY,5000);     }             //****************************************************************     // 判断应用是否初次加载，读取SharedPreferences中的guide_activity字段     //****************************************************************     private static final String SHAREDPREFERENCES_NAME = "my_pref";     private static final String KEY_GUIDE_ACTIVITY = "guide_activity";     private boolean isFirstEnter(Context context,String className){         if(context==null || className==null||"".equalsIgnoreCase(className))return false;         String mResultStr = context.getSharedPreferences(SHAREDPREFERENCES_NAME, Context.MODE_WORLD_READABLE)                  .getString(KEY_GUIDE_ACTIVITY, "");//取得所有类名 如 com.my.MainActivity         if(mResultStr.equalsIgnoreCase("false"))             return false;         else             return true;     }                 //*************************************************     // Handler:跳转至不同页面     //*************************************************     private final static int SWITCH_MAINACTIVITY = 1000;     private final static int SWITCH_GUIDACTIVITY = 1001;     public Handler mHandler = new Handler(){         public void handleMessage(Message msg) {             switch(msg.what){             case SWITCH_MAINACTIVITY:                 Intent mIntent = new Intent();                 mIntent.setClass(SplashActivity.this, MainActivity.class);                 SplashActivity.this.startActivity(mIntent);                 SplashActivity.this.finish();                 break;             case SWITCH_GUIDACTIVITY:                 mIntent = new Intent();                 mIntent.setClass(SplashActivity.this, GuideActivity.class);                 SplashActivity.this.startActivity(mIntent);                 SplashActivity.this.finish();                 break;             }             super.handleMessage(msg);         }     }; }

(2)添加引导Activity的布局文件activity_guide.xml

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<?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:orientation="vertical" >           <LinearLayout         android:id="@+id/linearLayout1"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:orientation="vertical">                   <android.support.v4.view.ViewPager             android:id="@+id/guidePages"             android:layout_width="fill_parent"             android:layout_height="wrap_content"/>     </LinearLayout>           <LinearLayout         android:id="@+id/linearLayout2"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:orientation="vertical">                   <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="40dp"                 android:gravity="center_horizontal"                 android:orientation="horizontal">                               </LinearLayout>         </RelativeLayout>               </LinearLayout>   </FrameLayout>

1

1	(3)添加引导时，左右滑动时的view，这里示例两个：

1	viewpager_page1.xml

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<?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="vertical">           <TextView         android:layout_width="fill_parent"         android:layout_height="fill_parent"         android:layout_gravity="center"         android:text="@string/guide_begin"         />   </LinearLayout>

viewpager_page2.xml

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<?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="vertical"     android:gravity="center">           <TextView         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/guide_end"/>     <Button         android:id="@+id/btn_close_guide"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/btn_close_guide"/>         </LinearLayout>

(4)修改引导Activity：GuideActivity.java

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package com.example.guidepagetest2;   import java.util.ArrayList;   import android.app.Activity; import android.content.Intent; import android.content.SharedPreferences; import android.os.Bundle; import android.os.Parcelable; import android.support.v4.view.PagerAdapter; import android.support.v4.view.ViewPager; import android.support.v4.view.ViewPager.OnPageChangeListener; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.ViewGroup.LayoutParams; import android.widget.Button; import android.widget.ImageView;   public class GuideActivity extends Activity {     private ViewPager viewPager;           /**装分页显示的view的数组*/     private ArrayList<View> pageViews;        private ImageView imageView;           /**将小圆点的图片用数组表示*/     private ImageView[] imageViews;           //包裹滑动图片的LinearLayout     private ViewGroup viewPics;           //包裹小圆点的LinearLayout     private ViewGroup viewPoints;           /** Called when the activity is first created. */     @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);                   //将要分页显示的View装入数组中         LayoutInflater inflater = getLayoutInflater();         pageViews = new ArrayList<View>();         pageViews.add(inflater.inflate(R.layout.viewpager_page1, null));         pageViews.add(inflater.inflate(R.layout.viewpager_page2, null));                   //创建imageviews数组，大小是要显示的图片的数量         imageViews = new ImageView[pageViews.size()];         //从指定的XML文件加载视图         viewPics = (ViewGroup) inflater.inflate(R.layout.activity_guide, null);                   //实例化小圆点的linearLayout和viewpager         viewPoints = (ViewGroup) viewPics.findViewById(R.id.viewGroup);         viewPager = (ViewPager) viewPics.findViewById(R.id.guidePages);                   //添加小圆点的图片         for(int i=0;i<pageViews.size();i++){             imageView = new ImageView(GuideActivity.this);             //设置小圆点imageview的参数             imageView.setLayoutParams(new LayoutParams(20,20));//创建一个宽高均为20 的布局             imageView.setPadding(20, 0, 20, 0);             //将小圆点layout添加到数组中             imageViews[i] = imageView;                           //默认选中的是第一张图片，此时第一个小圆点是选中状态，其他不是             if(i==0){                 imageViews[i].setBackgroundResource(R.drawable.page_indicator_focused);             }else{                 imageViews[i].setBackgroundResource(R.drawable.page_indicator);             }                           //将imageviews添加到小圆点视图组             viewPoints.addView(imageViews[i]);         }                   //显示滑动图片的视图         setContentView(viewPics);                   //设置viewpager的适配器和监听事件         viewPager.setAdapter(new GuidePageAdapter());         viewPager.setOnPageChangeListener(new GuidePageChangeListener());            }           private Button.OnClickListener  Button_OnClickListener = new Button.OnClickListener() {         public void onClick(View v) {             //设置已经引导             setGuided();                           //跳转             Intent mIntent = new Intent();             mIntent.setClass(GuideActivity.this, MainActivity.class);             GuideActivity.this.startActivity(mIntent);             GuideActivity.this.finish();         }     };           private static final String SHAREDPREFERENCES_NAME = "my_pref";     private static final String KEY_GUIDE_ACTIVITY = "guide_activity";     private void setGuided(){         SharedPreferences settings = getSharedPreferences(SHAREDPREFERENCES_NAME, 0);         SharedPreferences.Editor editor = settings.edit();         editor.putString(KEY_GUIDE_ACTIVITY, "false");         editor.commit();     }                 class GuidePageAdapter extends PagerAdapter{           //销毁position位置的界面         @Override         public void destroyItem(View v, int position, Object arg2) {             // TODO Auto-generated method stub             ((ViewPager)v).removeView(pageViews.get(position));                       }           @Override         public void finishUpdate(View arg0) {             // TODO Auto-generated method stub                       }                   //获取当前窗体界面数         @Override         public int getCount() {             // TODO Auto-generated method stub             return pageViews.size();         }           //初始化position位置的界面         @Override         public Object instantiateItem(View v, int position) {             // TODO Auto-generated method stub             ((ViewPager) v).addView(pageViews.get(position));                             // 测试页卡1内的按钮事件              if (position == 1) {                  Button btn = (Button) v.findViewById(R.id.btn_close_guide);                  btn.setOnClickListener(Button_OnClickListener);              }                            return pageViews.get(position);          }           // 判断是否由对象生成界面         @Override         public boolean isViewFromObject(View v, Object arg1) {             // TODO Auto-generated method stub             return v == arg1;         }               @Override         public void startUpdate(View arg0) {             // TODO Auto-generated method stub                       }           @Override         public int getItemPosition(Object object) {             // TODO Auto-generated method stub             return super.getItemPosition(object);         }           @Override         public void restoreState(Parcelable arg0, ClassLoader arg1) {             // TODO Auto-generated method stub                       }           @Override         public Parcelable saveState() {             // TODO Auto-generated method stub             return null;         }     }                 class GuidePageChangeListener implements OnPageChangeListener{           @Override         public void onPageScrollStateChanged(int arg0) {             // TODO Auto-generated method stub                       }           @Override         public void onPageScrolled(int arg0, float arg1, int arg2) {             // TODO Auto-generated method stub                       }           @Override         public void onPageSelected(int position) {             // TODO Auto-generated method stub             for(int i=0;i<imageViews.length;i++){                 imageViews[position].setBackgroundResource(R.drawable.page_indicator_focused);                 //不是当前选中的page，其小圆点设置为未选中的状态                 if(position !=i){                     imageViews[i].setBackgroundResource(R.drawable.page_indicator);                 }             }                       }     }    }

(5)大体上OK了，再贴上几张图片吧

动画加载页面：

引导页面：

 

点击“关闭引导界面”或者非首次进入应用后的功能页面：

Done！

作者：风倾清凌

出处：http://www.cnblogs.com/Amandaliu/

本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利.