Android ViewPager实现左右滑动翻页

Android ViewPager实现左右滑动翻页

代码如下：

package com.example.demo;

import java.util.ArrayList;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;


public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		ViewPager mViewPager=(ViewPager) findViewById(R.id.viewPager);
		
		PagerAdapter mPagerAdapter=new MyPagerAdapter(this);
		
		mViewPager.setAdapter(mPagerAdapter);
	}
	
	private	class	MyPagerAdapter	extends	PagerAdapter{

		private	Context context;
		
		private	ArrayList<TextView> views;
		
		public	MyPagerAdapter(Context context){
			this.context=context;
			views=new ArrayList<TextView>();
			for(int i=0;i<30;i++){
				TextView tv=new TextView(context);
				tv.setText(""+i);
				views.add(tv);
			}
		}
		
		@Override
		public int getCount() {
			return views.size();
		}
		
		@Override
		public void destroyItem(ViewGroup container, int position,Object object) {
			container.removeView(views.get(position));
		}
		
		@Override
		public	View	instantiateItem(ViewGroup container, int position){
			 ((ViewGroup) container).addView(views.get(position));
			 
			return	views.get(position);
		}

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

布局文件：

<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"
    tools:context="com.example.demo.MainActivity" >

    <android.support.v4.view.ViewPager 
        android:id="@+id/viewPager"
        android:layout_width="match_parent"
    android:layout_height="match_parent"/>
</RelativeLayout>