Android Tab（TabLayout+Fragment）

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical">

<android.support.design.widget.TabLayout
android:id="@+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/colorPrimary"
app:tabIndicatorColor="@color/white"
app:tabSelectedTextColor="@color/gray"
app:tabTextColor="@color/white"
/>

<android.support.v4.view.ViewPager
android:id="@+id/container"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
/>

</LinearLayout>

package com.gamoos.hellotabwidget;

import android.support.design.widget.TabLayout;
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.os.Bundle;

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Fragment tabFrames[] = new Fragment[]{new AFragment(), new BFragment(), new CFragment()};
String tabTitles[] = new String[]{"主页", "新闻", "论坛"};

TabLayout tabLayout = (TabLayout) findViewById(R.id.tabLayout);

TabFragmetPagerAdapter fAdapter = new TabFragmetPagerAdapter(getSupportFragmentManager(), tabTitles, tabFrames);

for (int i = 0; i < tabTitles.length; i++) {
tabLayout.addTab(tabLayout.newTab().setText(tabTitles[i]));
}

ViewPager viewPaper = (ViewPager) findViewById(R.id.container);
//viewpager加载adapter
viewPaper.setAdapter(fAdapter);
//TabLayout加载viewpager
tabLayout.setupWithViewPager(viewPaper);
}

public class TabFragmetPagerAdapter extends FragmentPagerAdapter {

public  Fragment tabFrames[];// = new Fragment[]{new AFragment(), new BFragment(), new CFragment()};
public String titles[];// = new String[]{"主页", "新闻", "论坛"};

public TabFragmetPagerAdapter(FragmentManager fm, String[] titles, Fragment[] tabFrames) {
super(fm);

this.titles = titles;

this.tabFrames = tabFrames;
}

@Override
public Fragment getItem(int position) {
return tabFrames[position];
}

@Override
public int getCount() {
return titles.length;
}

@Override
public CharSequence getPageTitle(int position) {
return titles[position];
}
}

}