【练习】ViewPager标签滑动

<?xml version="1.0" encoding="utf-8"?>
<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">

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

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/fragment_textview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</LinearLayout>

public class MainActivity extends AppCompatActivity {

    private ViewPager viewPager;
    private PagerTabStrip pagerTab;
    private List<String> titles;    //标签
    private List<Fragment> fragments;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化页面
        initView();
        //初始化标题数组
        initTitle();
        //初始化fragments
        initFragment();
        FragmentAdapter adapter = new FragmentAdapter(getSupportFragmentManager());
        viewPager.setAdapter(adapter);
    }

    private void initView() {
        viewPager = (ViewPager) findViewById(R.id.viewpager);
        pagerTab = (PagerTabStrip) findViewById(R.id.pagerTab);
        pagerTab.setBackgroundColor(Color.GREEN);
        pagerTab.setTabIndicatorColor(Color.RED);
        pagerTab.setDrawFullUnderline(true);
    }

    private void initTitle() {
        titles = new ArrayList<String>();
        for(int i = 0;i<10;i++){
            titles.add("第"+i+"个标签");
        }
    }

    private void initFragment() {
        fragments = new ArrayList<Fragment>();
        for(int i = 0;i<titles.size();i++){
            MyFragment myFragment = new MyFragment();
            Bundle bundle = new Bundle();
            bundle.putString("content","第"+i+"个fragment");
            myFragment.setArguments(bundle);
            fragments.add(myFragment);
        }
    }

    class FragmentAdapter extends FragmentPagerAdapter{

        public FragmentAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            return fragments.get(position);
        }

        @Override
        public int getCount() {
            return fragments.size();
        }

        @Override
        public CharSequence getPageTitle(int position) {
            return titles.get(position);
        }
    }
}

public class MyFragment extends Fragment {
    private String content;
        private TextView fragment_textview;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Bundle bundle = getArguments();
        content = bundle.getString("content","没有内容");
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.myfragment,container,false);
        fragment_textview = (TextView) view.findViewById(R.id.fragment_textview);
        return view;
    }

    @Override
    public void onActivityCreated( Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        fragment_textview.setText(content);
    }
}