Android ViewPager实现选项卡切换

<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=".MainActivity" >  <android.support.v4.view.ViewPager    android:id="@+id/viewpager"    android:layout_height="wrap_content"    android:layout_width="wrap_content"        >    <android.support.v4.view.PagerTabStrip      android:id="@+id/tabstrip"      android:layout_height="wrap_content"    android:layout_width="wrap_content"      />        </android.support.v4.view.ViewPager></RelativeLayout>

package com.example.viewpager;import java.util.ArrayList;import android.os.Bundle;import android.app.Activity;import android.graphics.Color;import android.support.v4.view.PagerAdapter;import android.support.v4.view.PagerTabStrip;import android.support.v4.view.ViewPager;import android.support.v4.view.ViewPager.OnPageChangeListener;import android.view.Menu;import android.view.View;import android.view.ViewGroup;import android.widget.Toast;public class MainActivity extends Activity implements OnPageChangeListener {  private ViewPager viewpager;  private PagerTabStrip tabstrip;  private String[] title={"首页","新闻","公告","图片"};  private ArrayList<View> views=new ArrayList<View>();  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    viewpager=(ViewPager) findViewById(R.id.viewpager);    tabstrip=(PagerTabStrip) findViewById(R.id.tabstrip);    initial();    viewpager.setAdapter(new MyPagerAdapter());  }  public void initial(){    views.add(getLayoutInflater().inflate(R.layout.layout1,null));    views.add(getLayoutInflater().inflate(R.layout.layout2,null));    views.add(getLayoutInflater().inflate(R.layout.layout1,null));    views.add(getLayoutInflater().inflate(R.layout.layout2,null));        tabstrip.setBackgroundColor(getResources().getColor(android.R.color.holo_blue_light));    tabstrip.setTabIndicatorColor(getResources().getColor(android.R.color.holo_blue_bright));    tabstrip.setTextColor(Color.WHITE);    viewpager.setOnPageChangeListener(this);  }  class MyPagerAdapter extends PagerAdapter{  @Override  public int getCount() {    // TODO 自动生成的方法存根    return views.size();  }    @Override  public Object instantiateItem(ViewGroup container, int position) {    View v=views.get(position);    container.addView(v);    return v;  }  @Override  public void destroyItem(ViewGroup container, int position, Object object) {    // TODO 自动生成的方法存根    //super.destroyItem(container, position, object);    container.removeView(views.get(position));  }  @Override  public boolean isViewFromObject(View arg0, Object arg1) {    // TODO 自动生成的方法存根    return arg0==arg1;  }  @Override  public CharSequence getPageTitle(int position) {    // TODO 自动生成的方法存根    return title[position];  }      }@Overridepublic void onPageScrollStateChanged(int arg0) {  // TODO 自动生成的方法存根  }@Overridepublic void onPageScrolled(int arg0, float arg1, int arg2) {  // TODO 自动生成的方法存根  }@Overridepublic void onPageSelected(int arg0) {  // TODO 自动生成的方法存根  //Toast.makeText(MainActivity.this,"新年快乐",Toast.LENGTH_SHORT).show();}  }