PagerSlidingTabStrip制作Android带标签的多界面滑动切换

package com.airk.myapplication.viewdemo.app.fragments;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import com.airk.myapplication.simplechat.app.widget.MyTextView; //我自定义的TextView，只是修改了默认字体，最近觉得Roboto-Light/Thin特别好看
/**
 * Simple Fragment which only has one TextView
 */
public class NumberFragment extends Fragment {
  private String content; //Fragment中显示的内容
  public static NumberFragment newInstance(String content) { //对外提供创建实例的方法，你给我需要显示的内容，我给你Fragment实例
    return new NumberFragment(content);
  }
  private NumberFragment(String content) {
    this.cOntent= content;
  }
  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    MyTextView tv = new MyTextView(getActivity());
    tv.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
        ViewGroup.LayoutParams.MATCH_PARENT));
    tv.setGravity(Gravity.CENTER);
    tv.setTextSize(26.0f);
    tv.setText(this.content);
    return tv; //只有一个全屏显示、居中的Roboto字体的TextView
  }
}

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main_activity);
    getSupportActionBar().setDisplayShowHomeEnabled(false); //ActionBar不显示应用Icon
    ViewPager viewpager = (ViewPager) findViewById(R.id.viewpager); //获取ViewPager
    viewpager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) { //简单创建一个FragmentPagerAdapter
      @Override
      public CharSequence getPageTitle(int position) { //必须复写这个方法，开源控件PagerSlidingTabStrip需要通过它获取标签标题
        return "Title " + (position + 1);
      }
      @Override
      public Fragment getItem(int i) {
        return NumberFragment.newInstance("Content " + (i + 1)); //返回刚刚我们创建的那个Fragment，显示内容为Content X
      }
      @Override
      public int getCount() {
        return 3; //测试只用3个标签
      }
    });
    PagerSlidingTabStrip strip = (PagerSlidingTabStrip) findViewById(R.id.tabstrip); //获取PagerSlidingTabStrip控件对象
    strip.setShouldExpand(true); //设置标签自动扩展——当标签们的总宽度不够屏幕宽度时，自动扩展使每个标签宽度递增匹配屏幕宽度，注意！这一条代码必须在setViewPager前方可生效
    strip.setViewPager(viewpager); //这是其所handle的ViewPager
    strip.setDividerColor(Color.TRANSPARENT); //设置每个标签之间的间隔线颜色 ->透明
    strip.setUnderlineHeight(3); //设置标签栏下边的间隔线高度，单位像素
    strip.setIndicatorHeight(6); //设置Indicator 游标 高度，单位像素
  }