• 【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

    <?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>
     
    (3)添加引导时,左右滑动时的view,这里示例两个:
    viewpager_page1.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="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

    <?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

    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:

    device-2012-12-03-174645

    引导页面:

    device-2012-12-03-174743 device-2012-12-03-174756

    点击“关闭引导界面”或者非首次进入应用后的功能页面:

    device-2012-12-03-174657

    Done!

    作者:风倾清凌
    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.
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  • 原文地址:https://www.cnblogs.com/bianhao007/p/3499777.html
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