android用ViewPager实现欢迎界面

一、页面布局文件

welcome.xml

<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_welcome"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:layout_alignParentLeft="true"

        android:layout_alignParentRight="true"

        android:layout_alignParentTop="true" >

    </android.support.v4.view.ViewPager>



</RelativeLayout>

View Code

welcome_one.xml

<LinearLayout 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" >



    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_gravity="center"

        android:background="@drawable/bg_icon"

        android:gravity="center"

        android:text="one"

        android:textAppearance="?android:attr/textAppearanceLarge" />



</LinearLayout>

View Code

welcome_two.xml

<LinearLayout 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" >



    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_gravity="center"

        android:background="@drawable/bg_icon"

        android:gravity="center"

        android:text="two"

        android:textAppearance="?android:attr/textAppearanceLarge" />



</LinearLayout>

View Code

welcom_three.xml

<LinearLayout 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" >



    <TextView

        android:id="@+id/tv_welcomethree"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_gravity="center"

        android:background="@drawable/bg_icon"

        android:gravity="center"

        android:text="three"

        android:textAppearance="?android:attr/textAppearanceLarge" />

    

        <Button

        android:id="@+id/btn_justtogo"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"     

        android:text="登录"/>    



</LinearLayout>

View Code

WelcomeActivity.java

package com.mytest.huilife;



import java.util.ArrayList;

import java.util.List;

import android.app.Activity;

import android.os.Bundle;

import android.support.v4.view.ViewPager;

import android.view.View;

import android.widget.Button;

import android.widget.Toast;





public class WelcomeActivity extends Activity {

    

    private List<View> welPageList;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.welcome);

    

        

        View welOne = getLayoutInflater().inflate(R.layout.welcome_one, null);

        View welTwo = getLayoutInflater().inflate(R.layout.welcome_two, null);

        View welThree = getLayoutInflater().inflate(R.layout.welcome_three, null);

        List<View> pageList = new ArrayList<View>();

        pageList.add(welOne);

        pageList.add(welTwo);

        pageList.add(welThree);

        

        ViewPager viewPager = (ViewPager) this.findViewById(R.id.viewpager_welcome);

        viewPager.setAdapter(new WelcomePagerAdapter(pageList));



        Button btnJusttogo = (Button)welThree.findViewById(R.id.btn_justtogo);

        btnJusttogo.setOnClickListener(new View.OnClickListener() {

            

            @Override

            public void onClick(View v) {

                Toast.makeText(WelcomeActivity.this, "just to go ", Toast.LENGTH_SHORT).show();

            }

        });        

        

    }

}

View Code

WelcomePagerAdapter.java

package com.mytest.huilife;



import java.util.List;



import android.os.Parcelable;

import android.support.v4.view.PagerAdapter;

import android.view.View;

import android.view.ViewGroup;



public class WelcomePagerAdapter extends PagerAdapter {



    private List<View> pageList;



    public WelcomePagerAdapter(List<View> pageList) {

        this.pageList = pageList;

    }



    @Override

    public void destroyItem(View arg0, int arg1, Object arg2) {

        ViewGroup vg = (ViewGroup) arg0;

        vg.removeView(pageList.get(arg1));



    }



    @Override

    public void finishUpdate(View arg0) {



    }



    @Override

    public int getCount() {

        return pageList.size();

    }



    @Override

    public Object instantiateItem(View arg0, int arg1) {

        ViewGroup vg = (ViewGroup) arg0;

        vg.addView(pageList.get(arg1));

        return pageList.get(arg1);

    }



    @Override

    public boolean isViewFromObject(View arg0, Object arg1) {

        return arg0 == arg1;

    }



    @Override

    public void restoreState(Parcelable arg0, ClassLoader arg1) {



    }



    @Override

    public Parcelable saveState() {



        return null;

    }



    @Override

    public void startUpdate(View arg0) {



    }



}

View Code