Android UI之ViewPager

标签：android   viewpager   

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

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

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:gravity="center"
    >
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Page1"
    />
</LinearLayout>

package com.rainsong.viewpagerdemo;

import java.util.ArrayList;

import android.app.Activity;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends Activity implements OnPageChangeListener {
    ViewPager mViewPager;
    ViewPagerAdapter mViewPagerAdapter;
    ArrayList<View> mViews; 

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

        // 将要分页显示的View装入数组中
        LayoutInflater inflater = getLayoutInflater();
        mViews = new ArrayList<View>();
        mViews.add(inflater.inflate(R.layout.viewpager_page1, null));
        mViews.add(inflater.inflate(R.layout.viewpager_page2, null));
        mViews.add(inflater.inflate(R.layout.viewpager_page3, null));
        mViews.add(inflater.inflate(R.layout.viewpager_page4, null));

        mViewPager = (ViewPager) findViewById(R.id.viewpager);
        mViewPagerAdapter = new ViewPagerAdapter(mViews);
        // 设置ViewPager的适配器和监听事件
        mViewPager.setAdapter(mViewPagerAdapter);
        mViewPager.setOnPageChangeListener(this);
    }

    @Override
    public void onPageScrollStateChanged(int arg0) {

    }

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

    }

    @Override
    public void onPageSelected(int position) {
        int pageId = position + 1;
        Toast.makeText(MainActivity.this, "Page" + pageId + " Selected", Toast.LENGTH_SHORT).show();
    }

}

package com.rainsong.viewpagerdemo;

import java.util.ArrayList;

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

public class ViewPagerAdapter extends PagerAdapter {
    private ArrayList<View> views;

    public ViewPagerAdapter (ArrayList<View> views){
        this.views = views;
    }

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

    @Override
    public Object instantiateItem(ViewGroup view, int position) {

        ((ViewPager) view).addView(views.get(position), 0);

        return views.get(position);
    }

    @Override
    public void destroyItem(ViewGroup view, int position, Object arg2) {
        ((ViewPager) view).removeView(views.get(position));
    }

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

Android UI之ViewPager

标签：android   viewpager   

原文地址：http://blog.csdn.net/hantangsongming/article/details/41720997