【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

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!

posted @ 2012-12-03 17:50  风倾清凌  阅读(...)  评论(... 编辑 收藏