Android Studio使用ViewPager+Fragment实现滑动菜单Tab效果

<?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" 

  <LinearLayout
    android:layout_width="match_parent"
    android:layout_height="40dp"
    android:layout_marginTop="1dp"
    android:background="@android:color/white"
    android:baselineAligned="false"
    android:gravity="center_vertical"
    android:orientation="horizontal"
    android:paddingBottom="5dp"
    android:paddingTop="5dp" 

    <!--detail Tab-- 
    <TextView
      android:id="@+id/item_detail"
      android:layout_width="0dp"
      android:layout_height="match_parent"
      android:layout_weight="1"
      android:gravity="center_horizontal|center_vertical"
      android:text="@string/detail_tab"
      android:textColor="@color/main_tab_text_color"
      android:textSize="20dp"/ 

    <!--category report Tab-- 
    <TextView
      android:id="@+id/item_category_report"
      android:layout_width="0dp"
      android:layout_height="match_parent"
      android:layout_weight="1"
      android:gravity="center_horizontal|center_vertical"
      android:text="@string/category_report_tab"
      android:textColor="@color/main_tab_text_color"
      android:textSize="20dp"/ 
  </LinearLayout 

  <android.support.v4.view.ViewPager
    android:id="@+id/mainViewPager"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1"/ 
</LinearLayout 

package com.hyl.acccountbookdemo;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
/**
* @programName: MainActivity.java
* @programFunction: Recording of income and expenditure
* @createDate: 2018/09/25
* @author: AnneHan
* @version:
* xx.  yyyy/mm/dd  ver  author  comments
* 01.  2018/09/25  1.00  AnneHan  New Create
*/
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private TextView item_detail, item_category_report;
private ViewPager vp;
private OneFragment oneFragment;
private TwoFragment twoFragment;
private List<Fragment  mFragmentList = new ArrayList<Fragment ();
private FragmentAdapter mFragmentAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initViews();
mFragmentAdapter = new FragmentAdapter(this.getSupportFragmentManager(), mFragmentList);
vp.setOffscreenPageLimit(2);//ViewPager的缓存为2帧
vp.setAdapter(mFragmentAdapter);
vp.setCurrentItem(0);//初始设置ViewPager选中第一帧
item_detail.setTextColor(Color.parseColor("#1ba0e1"));
//ViewPager的监听事件
vp.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
/*此方法在页面被选中时调用*/
changeTextColor(position);
}
@Override
public void onPageScrollStateChanged(int state) {
/*此方法是在状态改变的时候调用，其中arg0这个参数有三种状态（0，1，2）。
arg0==1的时辰默示正在滑动，
arg0==2的时辰默示滑动完毕了，
arg0==0的时辰默示什么都没做。*/
}
});
}
/**
* 初始化布局View
*/
private void initViews() {
item_detail = (TextView) findViewById(R.id.item_detail);
item_category_report = (TextView) findViewById(R.id.item_category_report);
item_detail.setOnClickListener(this);
item_category_report.setOnClickListener(this);
vp = (ViewPager) findViewById(R.id.mainViewPager);
oneFragment = new OneFragment();
twoFragment = new TwoFragment();
//给FragmentList添加数据
mFragmentList.add(oneFragment);
mFragmentList.add(twoFragment);
}
/**
* 点击头部Text 动态修改ViewPager的内容
*/
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.item_detail:
vp.setCurrentItem(0, true);
break;
case R.id.item_category_report:
vp.setCurrentItem(1, true);
break;
}
}
public class FragmentAdapter extends FragmentPagerAdapter {
List<Fragment  fragmentList = new ArrayList<Fragment ();
public FragmentAdapter(FragmentManager fm, List<Fragment  fragmentList) {
super(fm);
this.fragmentList = fragmentList;
}
@Override
public Fragment getItem(int position) {
return fragmentList.get(position);
}
@Override
public int getCount() {
return fragmentList.size();
}
}
/**
* 由ViewPager的滑动修改头部导航Text的颜色
* @param position
*/
private void changeTextColor(int position) {
if (position == 0) {
item_detail.setTextColor(Color.parseColor("#1ba0e1"));
item_category_report.setTextColor(Color.parseColor("#000000"));
} else if (position == 1) {
item_category_report.setTextColor(Color.parseColor("#1ba0e1"));
item_detail.setTextColor(Color.parseColor("#000000"));
}
}
}

<?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" 
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="@string/detail_tab"
android:textSize="25sp"/ 
</LinearLayout 

package com.hyl.acccountbookdemo;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* @programName: OneFragment.java
* @programFunction:
* @createDate: 2018/09/25
* @author: AnneHan
* @version:
* xx.  yyyy/mm/dd  ver  author  comments
* 01.  2018/09/25  1.00  AnneHan  New Create
*/
public class OneFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_one, container, false);
}
}

<string name="detail_tab" 明细</string 
<string name="category_report_tab" 类别报表</string 

<color name="main_tab_text_color" #000000</color