安卓Ui設計i

側拉和導航欄的基本邏輯

//配置抽屜
		 private AppBarConfiguration mAppBarConfiguration;
		DrawerLayout drawer = findViewById(R.id.drawer_layout);
        NavigationView navigationView = findViewById(R.id.nav_view);
        mAppBarConfiguration = new AppBarConfiguration.Builder(
                R.id.nav_home, R.id.nav_gallery, R.id.nav_slideshow)
                .setDrawerLayout(drawer)
                .build();
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        //添加抽屜功能 使得actionbar 能有抽屜按鈕 具備導航功能
        NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
        //使得點擊可以跳轉
        NavigationUI.setupWithNavController(navigationView, navController);
        

setupActionBarWithNavController方法

Sets up the ActionBar returned by {@link AppCompatActivity#getSupportActionBar()} for use
      with a {@link NavController}.

因爲要去把導航視圖和導航控制器連接起來所有要去執行這個方法

setupWithNavController方法

Sets up a {@link NavigationView} for use with a {@link NavController}. This will call
     {@link #onNavDestinationSelected(MenuItem, NavController)} when a menu item is selected.
      The selected item in the NavigationView will automatically be updated when the destination
     changes.

爲了把視圖和導航連接起來

Tablayout加上viewpager

基本的步驟

 /**
     * 1 寫viewpager的適配器
     * 2 new viewpagerAdapter 後綁定viewpager
     * 3  viewPager.setAdapter(sectionsPagerAdapter);
     * 4 首先綁定Tablayout
     * 5 tabs.setupWithViewPager(viewPager);
     * @param savedInstanceState
     */