android 引导界面的实现

文章出处：http://blog.csdn.net/djy1992/article/details/9020831

现在越来越多程序都有引导页面了。

网上资料不全。现在自己实现下。

下图是总的目录结构。

/**
 * 实现
 * @author dujinyang
 *
 */

顺序是： OneAcitivity  -->MainActivity -> TwoActivity

然后第2次进去就是：OneActivity -> TwoActivity

代码里都有注释的了，这里就不多说了。

OneActivity的代码如下：

package cn.djy.activity;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;

/**
 * 开机动画
 * @author Administrator
 *
 */
public class OneActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.one);

		boolean flag=this.isFirstEnter(getApplicationContext(), this.getClass().getName());
		if(flag)
			mHandler.sendEmptyMessageDelayed(SWITCH_GUIDACTIVITY,4000);
		else
			mHandler.sendEmptyMessageDelayed(SWITCH_TWOACTIVITY, 4000);

	}

	//***********************************************************************
	//判断应用是否初次加载，读取SharedPreferences 的字段
	//***********************************************************************
	private static final String SHAREDPREFERENCES_NAME="yang";
	private static final String KEY_GUIDE_ACTIVITY="Open";
	/**
	 * mResultStr.equalsIgnoreCase("false") 返回FALSE
	 * TRUE 则为空值
	 * @param context
	 * @param className
	 * @return boolean
	 */
	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, "");
		if(mResultStr.equalsIgnoreCase("false"))
			return false;
		else
			return true;
	}

	//****************************************
	//Handler:跳转至不同页面
	//****************************************
	private final static int SWITCH_TWOACTIVITY=1000; //主页

	private final static int SWITCH_GUIDACTIVITY=1001; //滑动手势
	private Handler mHandler=new Handler(){
		public void handleMessage(android.os.Message msg) {
			switch (msg.what) {
			case SWITCH_TWOACTIVITY:
					Intent intent=new Intent();
					intent.setClass(OneActivity.this,TwoActivity.class);
					OneActivity.this.startActivity(intent);
				//	OneActivity.this.finish();
				break;
			case SWITCH_GUIDACTIVITY:
					Intent intents=new Intent();
					intents.setClass(OneActivity.this,MainActivity.class);
					OneActivity.this.startActivity(intents);
				//	OneActivity.this.finish();
					break;
			}
			super.handleMessage(msg);
		};
	};

}

MainActivity的代码如下:

package cn.djy.activity;

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.View.OnClickListener;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TwoLineListItem;
/**
 * 实现
 * @author dujinyang
 *
 */
public class MainActivity extends Activity {

	private ViewPager _viewpager;

	/**
	 * 分页显示的View数组
	 */
	private ArrayList<View> _pagerlist;
	private ImageView image;

	/**
	 * 小圆点的图片 放进数组
	 */
	private ImageView[] _imageViews;

	//包裹滑动的图片Linearlayout
	private ViewGroup _group;

	//包裹小圆点的Linearlayout
	private ViewGroup _viewPonits;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.start);

        LayoutInflater inflater=getLayoutInflater();
        _pagerlist =new ArrayList<View>();
        _pagerlist.add(inflater.inflate(R.layout.viewpager_page1,null));
        _pagerlist.add(inflater.inflate(R.layout.viewpager_page2,null));

        //创建Imageviews数组，大小是要显示的图片数量
        _imageViews =new ImageView[_pagerlist.size()];

//        ViewGroup
        _group =(ViewGroup) inflater.inflate(R.layout.start, null);//加载MAIN.XML

        _viewPonits=(ViewGroup) _group.findViewById(R.id.icon_circle);//加载小圆点的图片

        _viewpager =(ViewPager) _group.findViewById(R.id.guidePages);//android.support.v4.view.ViewPager

        //添加小圆点的图片
        for (int i = 0; i < _imageViews.length; i++) {
			 image= new ImageView(this);
			 //设置小圆点的imageview的参数
			 image.setLayoutParams(new LayoutParams(20,20));//宽高均为20
			 image.setPadding(20, 0, 20, 0);
			 _imageViews[i]=image;

			 //第一张是选中状态
			 if(i==0){
				 _imageViews[i].setBackgroundResource(R.drawable.a2a);
			 }else{
				 _imageViews[i].setBackgroundResource(R.drawable.a1a);
			 }
			 _viewPonits.addView(_imageViews[i]);
		}
        //显示视图
        setContentView(_group);
        _viewpager.setAdapter(new GuidePageAdapter());
        _viewpager.setOnPageChangeListener(new GuidePageChangeListener());
    }

    void setGuided(){
    	SharedPreferences shared=getSharedPreferences("yang",0);
    	SharedPreferences.Editor editor=shared.edit();
    	editor.putString("Open", "false");
    	editor.commit();
    }

    class GuidePageAdapter extends PagerAdapter{

		@Override
		public int getCount() {
			return _pagerlist.size();
		}

		//initalization position page
		@Override
		public Object instantiateItem(View container, int position) {
			((ViewPager)container).addView(_pagerlist.get(position));
			if(position==1){
				Button bt=(Button) container.findViewById(R.id.bt_close);
				bt.setOnClickListener(new OnClickListener() {
					@Override
					public void onClick(View v) {
						//设置已经引导
						setGuided();
						//Intent
						Intent intent=new Intent();
						intent.setClass(MainActivity.this,TwoActivity.class );
						MainActivity.this.startActivity(intent);
						MainActivity.this.finish();
					}
				});

			}
			return _pagerlist.get(position);
		}

		//判断是否由对象生成页面
		@Override
		public boolean isViewFromObject(View view, Object obj) {
			return view==obj;
		}

		//销毁页面的位置
		@Override
		public void destroyItem(View container, int position, Object object) {
			((ViewPager)container).removeView(_pagerlist.get(position));
		}

		@Override
		public void finishUpdate(View container) {
			//finish
		}

		@Override
		public void startUpdate(View container) {
			//start
		}

		@Override
		public int getItemPosition(Object object) {
			//getItemPosition
			return super.getItemPosition(object);
		}

		@Override
		public void restoreState(Parcelable state, ClassLoader loader) {
			super.restoreState(state, loader);
			//restore
		}

		@Override
		public Parcelable saveState() {
			return super.saveState();
			//save
		}
    }

    class GuidePageChangeListener implements OnPageChangeListener{

		@Override
		public void onPageScrollStateChanged(int arg0) {

		}

		@Override
		public void onPageScrolled(int arg0, float arg1, int arg2) {

		}

		@Override
		public void onPageSelected(int position) {
			for (int i = 0; i < _imageViews.length; i++) {
					_imageViews[position].setBackgroundResource(R.drawable.a2a);
					if(position!=i)
						_imageViews[i].setBackgroundResource(R.drawable.a1a);

			}
		}

    }
}

最后是TWOActivity：这个Activity是显示的内容。

package cn.djy.activity;

import android.app.Activity;
import android.os.Bundle;

public class TwoActivity extends Activity{

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.end);
	}

}

主要代码完成。

里面涉及的drawable图片是小圆点图片。

下面贴出XML的。

start.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
 	 <LinearLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" android:id="@+id/linear_viewpager">

 	 	<android.support.v4.view.ViewPager 	android:id="@+id/guidePages" android:layout_width="fill_parent"  android:layout_height="wrap_content"/>

 	 </LinearLayout>

 	 <LinearLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" android:id="@+id/linear_circle">

 	 	 <RelativeLayout android:layout_width="fill_parent" android:layout_height="wrap_content" >
 	 	 		<LinearLayout android:id="@+id/icon_circle"
 	 	 					  android:layout_width="fill_parent"
 	 	 					  android:layout_height="wrap_content"
 	 	 					  android:layout_marginBottom="40dip"
 	 	 					  android:layout_alignParentBottom="true"
 	 	 					  android:gravity="center_vertical"
 	 	 					  android:orientation="horizontal"/>
 	 	 </RelativeLayout>

 	 </LinearLayout>

</FrameLayout>

其实是用Group把子项包起来作为显示：

那子项为：

viewpager_page1.xml

<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:gravity="center" android:text="adfasfasfweqwwfqw'"
   />
 </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="pages222222222222222222"></TextView>

  <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="asdfi14234124" android:id="@+id/bt_close"></Button>
</LinearLayout>

总的代码完成。

希望大家互相学习 互相共享。