2. 使用FragemntTabHost+Fragment实现功能界面切换；
 3. 使用HttpClient网络框架进行网络访问；


 
图5.1主界面图

主要实现代码如下所示：
private Toolbar toolbar;
private DrawerLayout drawerLayout;
private ActionBarDrawerToggle drawerToggle;
private NavigationView navigationView;
private CoordinatorLayout coordinatorLayout;
private FragmentTabHost ftIndicatorTabHost;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    initContentView();
    initToolBar();
    initDrawerLayout();
    initNavigationView();
    setFragmentTabHost();

}

private void initNavigationView() {
    navigationView = (NavigationView) findViewById(R.id.nv_main_navigationView);
    navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
        @Override
        public boolean onNavigationItemSelected(MenuItem item) {
            drawerLayout.closeDrawers();
            navigationView.setCheckedItem(item.getItemId());
            return true;
        }
    });
}

private void initDrawerLayout() {
    drawerLayout = (DrawerLayout) findViewById(R.id.dl_main_drawerLayout);
    drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, 0, 0);
    drawerToggle.syncState();
    drawerLayout.setDrawerListener(drawerToggle);
}

private void initToolBar() {
    toolbar = (Toolbar) findViewById(R.id.tb_main_toolBar);
    toolbar.setTitle("热点新闻");
    toolbar.setTitleTextColor(UIUtils.getColor(R.color.black_gray));
    setSupportActionBar(toolbar);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}

private void initContentView() {
    setContentView(R.layout.activity_main);
    coordinatorLayout = (CoordinatorLayout) findViewById(R.id.dl_main_coordinatorLayout);
}

private void setFragmentTabHost() {
    //1.初始化FragmentTabHost
    ftIndicatorTabHost = (FragmentTabHost) findViewById(R.id.ft_indicator_fragment_host);
    //2.关联tabHost和FrameLayout
    ftIndicatorTabHost.setup(UIUtils.getContext(), getSupportFragmentManager(), R.id.fl_main);
    //3.创建Tab
    TabHost.TabSpec tab1 = ftIndicatorTabHost.newTabSpec("热点新闻");
    tab1.setIndicator(getIndicatorView("热点新闻", R.drawable.tab_news));
    TabHost.TabSpec tab2 = ftIndicatorTabHost.newTabSpec("服务");
    tab2.setIndicator(getIndicatorView("服务", R.drawable.tab_service));
    TabHost.TabSpec tab3 = ftIndicatorTabHost.newTabSpec("求职");
    tab3.setIndicator(getIndicatorView("求职", R.drawable.tab_work));
    //4.添加tab
    ftIndicatorTabHost.addTab(tab1, NewsFragment.class, getBundle("热点新闻"));
    ftIndicatorTabHost.addTab(tab2, ServiceFragment.class, getBundle("服务")); 基于Android的大学生生活小助手设计与开发(6):http://www.751com.cn/jisuanji/lunwen_1423.html