Android实现头部切换页（Fragment+viewPager）_android 使用fragment 头部导航切换

public class FirstFragment extends Fragment {
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view=inflater.inflate(R.layout.first_fragment,container,false);
        return view;
    }
}

public class FragmentViewPagerAdapter extends FragmentPagerAdapter {
 
    //需要显示的Fragment
    private List<Fragment> fragments;
 
    public FragmentViewPagerAdapter(FragmentManager fm,List<Fragment> fragments){
        super(fm);
        this.fragments=fragments;
    }
 
    @Override
    public Fragment getItem(int position) {
        //得到具体的Fragment
        return fragments.get(position);
    }
 
    @Override
    public int getCount() {
        //返回数量
        return fragments.size();
    }
}

public class MainActivity extends FragmentActivity {
 
    private ViewPager viewPager;
    private List<Fragment> fragmentList;
    private TextView tvTab1,tvTab2,tvTab3;
    private int currIndex;
 
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        initViewPager();
    }
 
    private void initView(){
        tvTab1= (TextView) findViewById(R.id.tv_tab1);
        tvTab2= (TextView) findViewById(R.id.tv_tab2);
        tvTab3= (TextView) findViewById(R.id.tv_tab3);
 
        tvTab1.setOnClickListener(new tvOnClickListener(0));
        tvTab2.setOnClickListener(new tvOnClickListener(1));
        tvTab3.setOnClickListener(new tvOnClickListener(2));
    }
 
    //textView的监听器，当按下textview控件时，可跳转到对应Fragment。
    private class tvOnClickListener implements View.OnClickListener{
 
        private int index=0;
 
        public tvOnClickListener(int index){
            this.index=index;
        }
 
        @Override
        public void onClick(View view) {
            viewPager.setCurrentItem(index);
        }
    }
 
    private void initViewPager(){
        viewPager= (ViewPager) findViewById(R.id.viewpager);
        fragmentList=new ArrayList<Fragment>();
        fragmentList.add(new FirstFragment());
        fragmentList.add(new SecondFragment());
        fragmentList.add(new ThirdFragment());
 
        //设置适配器
        viewPager.setAdapter(new FragmentViewPagerAdapter(getSupportFragmentManager(), fragmentList));
        viewPager.setCurrentItem(0);
        tvTab1.setTextColor(Color.RED);
        //设置监听
        viewPager.setOnPageChangeListener(new MyOnPageChangeListener());
    }
 
    private class MyOnPageChangeListener implements ViewPager.OnPageChangeListener{
 
        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 
        }
 
        @Override
        public void onPageSelected(int position) {
            currIndex=position;
            //使TextView改变颜色，指示现在是哪个Fragment。
            switch (position){
                case 0:
                    tvTab1.setTextColor(Color.RED);
                    tvTab2.setTextColor(Color.WHITE);
                    tvTab3.setTextColor(Color.WHITE);
                    break;
                case 1:
                    tvTab1.setTextColor(Color.WHITE);
                    tvTab2.setTextColor(Color.RED);
                    tvTab3.setTextColor(Color.WHITE);
                    break;
                case 2:
                    tvTab1.setTextColor(Color.WHITE);
                    tvTab2.setTextColor(Color.WHITE);
                    tvTab3.setTextColor(Color.RED);
                    break;
            }
        }
 
        @Override
        public void onPageScrollStateChanged(int state) {
 
        }
    }
}

<LinearLayout 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:orientation="vertical">
 
    <LinearLayout
        android:background="#009959"
        android:layout_width="match_parent"
        android:layout_height="@dimen/topbarheight"
        android:orientation="horizontal">
        <TextView
            android:id="@+id/tv_tab1"
            android:layout_weight="1"
            android:textSize="18sp"
            android:text="@string/tab1_title"
 
            android:gravity="center"
            android:layout_gravity="center_vertical"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <TextView
            android:id="@+id/tv_tab2"
            android:layout_weight="1"
            android:textSize="18sp"
 
            android:text="@string/tab2_title"
            android:gravity="center"
            android:layout_gravity="center_vertical"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <TextView
            android:id="@+id/tv_tab3"
            android:layout_weight="1"
            android:textSize="18sp"
 
            android:text="@string/tab3_title"
            android:gravity="center"
            android:layout_gravity="center_vertical"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </LinearLayout>
 
    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:flipInterval="30"
        android:persistentDrawingCache="animation"/>
 
</LinearLayout>

//透明状态栏
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
        //透明导航栏
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);

android:fitsSystemWindows="true"
android:clipToPadding="true"