ViewPager界面导航

首先先写一个不到导航小圆点的界面导航,先单纯的使用viewPager实现界面滑动,然后加入小圆点即可实现常见的首次登陆出现导航页面

先上图,方便大家观看:

下面贴一下主要代码:

 package com.sdufe.thea.guo;

 import java.util.ArrayList;
 import java.util.List;

 import com.sdufe.thea.guo.adapter.MyNavigationAdapter;

 import android.os.Bundle;
 import android.app.Activity;
 import android.support.v4.view.ViewPager;
 import android.support.v4.view.ViewPager.OnPageChangeListener;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.Window;
 import android.view.WindowManager;
 import android.widget.Button;
 import android.widget.Toast;

 public class MainActivity extends Activity implements OnClickListener,
         OnPageChangeListener {

     private List<View> views;
     private ViewPager viewPager;
     private MyNavigationAdapter adapter;
     private View view01;
     private View view02;
     private View view03;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

         requestWindowFeature(Window.FEATURE_NO_TITLE);

         setContentView(R.layout.activity_main);

         getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                 WindowManager.LayoutParams.FLAG_FULLSCREEN);

         viewPager = (ViewPager) findViewById(R.id.viewpager);

         views = new ArrayList<View>();

         view01 = LayoutInflater.from(this).inflate(R.layout.view01, null);
         view02 = LayoutInflater.from(this).inflate(R.layout.view02, null);
         view03 = LayoutInflater.from(this).inflate(R.layout.view03, null);
         views.add(view01);
         views.add(view02);
         views.add(view03);

         adapter = new MyNavigationAdapter(views);

         viewPager.setAdapter(adapter);
         viewPager.setOnPageChangeListener(this);
         Button begin = (Button) view03.findViewById(R.id.begin);

         begin.setOnClickListener(this);
     }

     @Override
     public void onClick(View v) {
         Toast.makeText(getApplicationContext(), "开启CSND之旅", Toast.LENGTH_LONG)
                 .show();
     }

     @Override
     public void onPageScrollStateChanged(int arg0) {

     }

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

     }

     @Override
     public void onPageSelected(int arg0) {
         viewPager.setCurrentItem(arg0);
     }

 }

以上就是主要代码了,主要是使用view填充viewpager的控件,对于viewPager的使用跟ListView是差不多的,都遇到个adapter,这里也贴一下adapter的代码,有疑问的可以留言

 package com.sdufe.thea.guo.adapter;

 import java.util.List;

 import android.support.v4.view.PagerAdapter;
 import android.support.v4.view.ViewPager;
 import android.view.View;

 public class MyNavigationAdapter extends PagerAdapter {

     List<View> views;

     public MyNavigationAdapter(List<View> views) {
         super();
         this.views = views;
     }

     @Override
     public int getCount() {
         if (views!=null) {
             return views.size();
         }
         return 0;
     }

     @Override
     public boolean isViewFromObject(View arg0, Object arg1) {
         return arg0==arg1;
     }

     @Override
     public void destroyItem(View container, int position, Object object) {
         ((ViewPager)container).removeView(views.get(position));
     }

     @Override
     public Object instantiateItem(View container, int position) {
         ((ViewPager)container).addView(views.get(position));
         return views.get(position);
     }



 }

还有就是viewPager的布局文件了,这里给个查询viewpager的快速方法,按ctrl+shirft+T,输入viewPager即可出现你需要的内容

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent" >

     <android.support.v4.view.ViewPager
         android:id="@+id/viewpager"
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
     <!-- 小圆点布局 -->
     <LinearLayout
         android:id="@+id/point"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_alignParentBottom="true"
         android:gravity="center"
         android:orientation="horizontal"
         android:visibility="gone">

         <ImageView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:src="@drawable/point"/>
         <ImageView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:src="@drawable/point"/>
         <ImageView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:src="@drawable/point"/>
     </LinearLayout>

 </RelativeLayout>

ok用viewPager实现左右滑动就结束了,就这么简单,搞清楚原理实现起了就很快了

下面来说一说带有小圆点的界面导航,也就是你所下载的app首次安装时出现的界面导航了

实现了基本的左右滑动,实现小圆点滑动就比较简单了,首先来个选择器,用于滑动时改变小圆点的颜色:

 <?xml version="1.0" encoding="utf-8"?>
 <selector xmlns:android="http://schemas.android.com/apk/res/android" >
     <item android:state_enabled="false" android:drawable="@drawable/indicator_normal"></item>
     <item android:state_enabled="true" android:drawable="@drawable/indicator_highlight"></item>
 </selector>

然后初始化圆点,并且在onPageSelected(int arg0)控制圆点背景色的改变

 package com.sdufe.thea.guo;

 import java.util.ArrayList;
 import java.util.List;

 import com.sdufe.thea.guo.adapter.MyNavigationAdapter;

 import android.os.Bundle;
 import android.app.Activity;
 import android.support.v4.view.ViewPager;
 import android.support.v4.view.ViewPager.OnPageChangeListener;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.Window;
 import android.view.WindowManager;
 import android.widget.Button;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.Toast;

 public class MainActivity extends Activity implements OnClickListener,
         OnPageChangeListener {

     private List<View> views;
     private ViewPager viewPager;
     private MyNavigationAdapter adapter;
     private View view01;
     private View view02;
     private View view03;
     private LinearLayout points;
     private ImageView[] point;
     private int currentItem;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

         requestWindowFeature(Window.FEATURE_NO_TITLE);

         setContentView(R.layout.activity_main);

         getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                 WindowManager.LayoutParams.FLAG_FULLSCREEN);

         viewPager = (ViewPager) findViewById(R.id.viewpager);

         views = new ArrayList<View>();

         view01 = LayoutInflater.from(this).inflate(R.layout.view01, null);
         view02 = LayoutInflater.from(this).inflate(R.layout.view02, null);
         view03 = LayoutInflater.from(this).inflate(R.layout.view03, null);
         views.add(view01);
         views.add(view02);
         views.add(view03);

         adapter = new MyNavigationAdapter(views);

         viewPager.setAdapter(adapter);
         viewPager.setOnPageChangeListener(this);
         Button begin = (Button) view03.findViewById(R.id.begin);

         begin.setOnClickListener(this);

         initPoint();
     }

     private void initPoint() {
         points=(LinearLayout) findViewById(R.id.point);
         point=new ImageView[views.size()];

         for (int i = 0; i < views.size(); i++) {
             point[i]=(ImageView) points.getChildAt(i);
             point[i].setEnabled(false);
             point[i].setTag(i);
         }

         currentItem=0;
         point[currentItem].setEnabled(true);
     }

     @Override
     public void onClick(View v) {
         Toast.makeText(getApplicationContext(), "开启CSND之旅", Toast.LENGTH_LONG)
                 .show();
     }

     @Override
     public void onPageScrollStateChanged(int arg0) {

     }

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

     }

     @Override
     public void onPageSelected(int arg0) {
         point[currentItem].setEnabled(false);
         point[arg0].setEnabled(true);
         currentItem=arg0;
     }

 }

结束,有疑问的留言我会回答你的问题

代码下载地址:http://download.csdn.net/detail/elinavampire/8166773