Android--FragmentTabHost+ViewPager+Fragment实现底部tab菜单栏

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context="com.app.gaolonglong.fragmenttabhost.MainActivity">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:popupTheme="@style/AppTheme.PopupOverlay" />

    </android.support.design.widget.AppBarLayout>

    <include layout="@layout/content_main" />

</android.support.design.widget.CoordinatorLayout>

content_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="com.app.gaolonglong.fragmenttabhost.MainActivity"
    tools:showIn="@layout/activity_main">

    <android.support.v4.app.FragmentTabHost
        android:id="@android:id/tabhost"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:orientation="vertical"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <FrameLayout
                android:id="@android:id/tabcontent"
                android:layout_weight="0"
                android:layout_width="0dp"
                android:layout_height="0dp"/>

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

            <TabWidget
                android:id="@android:id/tabs"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"/>

        </LinearLayout>

    </android.support.v4.app.FragmentTabHost>

</RelativeLayout>

tab_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:paddingTop="4dp"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/image"
        android:src="@drawable/tab_report"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/title"
        android:text="首页"
        android:gravity="center"
        android:textSize="14sp"
        android:textColor="@drawable/tab_title_color"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

HomeFragment

public class HomeFragment extends Fragment {

    private View mRootView;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        if (mRootView == null){
            mRootView = inflater.inflate(R.layout.home_fragment,container,false);
        }
        ViewGroup parent = (ViewGroup) mRootView.getParent();
        if (parent != null){
            parent.removeView(mRootView);
        }
        return mRootView;
    }
}

MainActivity

public class MainActivity extends AppCompatActivity {

    private FragmentTabHost mTabHost;
    private ViewPager mViewPager;
    private List<Fragment> mFragmentList;
    private Class mClass[] = {HomeFragment.class,ReportFragment.class,MessageFragment.class,MineFragment.class};
    private Fragment mFragment[] = {new HomeFragment(),new ReportFragment(),new MessageFragment(),new MineFragment()};
    private String mTitles[] = {"首页","报表","消息","我的"};
    private int mImages[] = {
            R.drawable.tab_home,
            R.drawable.tab_report,
            R.drawable.tab_message,
            R.drawable.tab_mine
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        init();

    }

    private void init() {

        initView();

        initEvent();
    }

    private void initView() {
        mTabHost = (FragmentTabHost) findViewById(android.R.id.tabhost);
        mViewPager = (ViewPager) findViewById(R.id.view_pager);

        mFragmentList = new ArrayList<Fragment>();

        mTabHost.setup(this, getSupportFragmentManager(), android.R.id.tabcontent);
        mTabHost.getTabWidget().setDividerDrawable(null);

        for (int i = 0;i < mFragment.length;i++){
            TabHost.TabSpec tabSpec = mTabHost.newTabSpec(mTitles[i]).setIndicator(getTabView(i));
            mTabHost.addTab(tabSpec,mClass[i],null);
            mFragmentList.add(mFragment[i]);
            mTabHost.getTabWidget().getChildAt(i).setBackgroundColor(Color.WHITE);
        }

        mViewPager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {
            @Override
            public Fragment getItem(int position) {
                return mFragmentList.get(position);
            }

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

    private View getTabView(int index) {
        View view = LayoutInflater.from(this).inflate(R.layout.tab_item, null);

        ImageView image = (ImageView) view.findViewById(R.id.image);
        TextView title = (TextView) view.findViewById(R.id.title);

        image.setImageResource(mImages[index]);
        title.setText(mTitles[index]);

        return view;
    }

    private void initEvent() {

        mTabHost.setOnTabChangedListener(new TabHost.OnTabChangeListener() {
            @Override
            public void onTabChanged(String tabId) {
                mViewPager.setCurrentItem(mTabHost.getCurrentTab());
            }
        });

        mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override
            public void onPageSelected(int position) {
                mTabHost.setCurrentTab(position);
            }

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}