　　android_ViewPager_实现导航页

　　　　既然是实现导航页的效果,那么我们肯定是要实现ViewPager的

　　　　要实现的效果如下

　　　　　　1.用户进入欢迎页面

　　　　　　2.判断是否是第一次进入,如果是,则进入导航页面,否则则进入主界面

　　　　要实现这个功能

　　　　　　1.首先我们需要几个导航页的布局文件,用来显示导航的内容

　　　　　　2.需要Activity来启动导航页,欢迎页,主页

　　　　所有代码如下

　　1.导航页布局文件 a.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:background="#000000"

    android:orientation="vertical" >

</LinearLayout>

　　b.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:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="11111111111111111" />

    <Button

        android:id="@+id/button1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="进入欢迎界面" />

</LinearLayout>

　　欢迎界面的Activity

package com.example.leran_viewpager;

import android.app.Activity;

import android.app.backup.SharedPreferencesBackupHelper;

import android.content.Intent;

import android.content.SharedPreferences;

import android.content.SharedPreferences.Editor;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

public class weclomActivity extends Activity {

    private static boolean isFristIn=false;

    private final static int goHome=122;

    private final static int goFrist=2;

    private Handler handler=new Handler(){

        public void handleMessage(Message msg) {

            switch(msg.what)

            {

            case goHome:

                GoToHome();

                break;

            case goFrist:

                GoToDD();

                break;

            }

        };

    };

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.weclom);

        init();

    }

    private void init()

    {

        SharedPreferences sp=getSharedPreferences("jsss",MODE_PRIVATE);

        isFristIn=sp.getBoolean("isFrist", true);

        if(isFristIn)

        {

            handler.sendEmptyMessageDelayed(goFrist, 2000);

            Editor ed=sp.edit();

            ed.putBoolean("isFrist", false);

            ed.commit();

        }else

        {

            handler.sendEmptyMessageDelayed(goHome, 2000);

        }

    }

    private void GoToHome()

    {

        startActivity(new Intent(this,ff.class));

        finish();

    }

    private void GoToDD()

    {

        startActivity(new Intent(this,MainActivity.class));

        finish();

    }

}

自定义PagerAdapter

package com.example.leran_viewpager;

import java.util.List;

import android.content.Context;

import android.support.v4.view.PagerAdapter;

import android.support.v4.view.ViewPager;

import android.view.View;

public class myAdapter extends PagerAdapter {

    private List<View> ArrayView=null;

    private Context cont=null;

    public myAdapter(List<View> ArrayView,Context cont)

    {

        this.ArrayView=ArrayView;

        this.cont=cont;

    }

    @Override

    public int getCount() {

        return ArrayView.size();

        }

    @Override

    public boolean isViewFromObject(View arg0, Object arg1) {

        return arg0==arg1;

    }

    @Override

    public void destroyItem(View container, int position, Object object) {

        ((ViewPager)container).removeView(ArrayView.get(position));

    }

    @Override

    public Object instantiateItem(View container, int position) {

        ((ViewPager)container).addView(ArrayView.get(position));

        return ArrayView.get(position);

    }

}

引导页Activity

package com.example.leran_viewpager;

import java.util.ArrayList;

import java.util.List;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.support.v4.view.ViewPager;

import android.view.LayoutInflater;

import android.view.View;

import android.view.View.OnClickListener;

public class MainActivity extends Activity {

    private List<View> Tview=null;

    private ViewPager vp=null;

    private myAdapter ma=null;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        Tview=new ArrayList<View>();

        LayoutInflater ly=  LayoutInflater.from(this);

        Tview.add(ly.inflate (R.layout.a, null));

        Tview.add(ly.inflate(R.layout.b, null));

        Tview.get(1).findViewById(R.id.button1).setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View v) {

                startActivity(new Intent(MainActivity.this,ff.class));

                finish();

            }

        });

        ma=new myAdapter(Tview, this);

        vp=new ViewPager(this);

        vp.setAdapter(ma);

        setContentView(vp);

    }

}

巴特西

android_ViewPager_实现导航页

android_ViewPager_实现导航页

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