TB+TableLayout+Fragment+VP開發實踐

'android.support.design:28.0.0'

<android.support.design.widget.AppBarLayout
android:id="@+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_scrollFlags="scroll|enterAlways" //滑動隱藏功能
app:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>
<android.support.design.widget.TabLayout
android:id="@+id/main_tablayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/color_title_bar"/>

<android.support.v4.view.ViewPager <!--TabLayout相關聯的ViewPager-->
android:id="@+id/viewpager"
android:layout_width="match_parent"
android:layout_height="0px"
android:layout_weight="1"
android:background="@android:color/white" />

public class XXXFragment extends Fragment {

private Page/View;//建立變數
 
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//mPage = getArguments().getInt(ARG_PAGE);
}
 
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_page, container, false);
TextView textView = (TextView) view; //參考[^6]
textView.setText("Fragment #" + mPage); 
return view;
}
 
}

public static final String TYPE = "TYPE"; //此處未知含義

//此處的含義可能是新增例項，儲存值？
public static XXXFragment newInstance(int page) { 
Bundle args = new Bundle();
args.putInt(ARG_PAGE, page);
PageFragment pageFragment = new PageFragment();
pageFragment.setArguments(args);
return pageFragment;
}

private Toolbar toolbar; //增加相關變數
private TabLayout tabLayout;
private ViewPager viewPager;

public static final String[] titles = {"", ""};

private List<Fragment> fragments; //定義fragment的集合縮寫
private List<String> tabNames;
private List<Integer> tabIcs;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_hotpoint);
initView();//各種初始化：介面、新增的fragment值、事件
initValue();
initEvent();
}

//各種初始化開始

private void initView() { //初始化例項

toolbar = (Toolbar) findViewById(R.id.Toolbar); 
setSupportActionBar(toolbar); //支援actionbar,此處多種寫法
getSupportActionBar().setDisplayHomeAsUpEnabled(true); //在首頁顯示

viewPager = (ViewPager) findViewById(R.id.viewpager); //例項化控制元件
tabLayout = (TabLayout) findViewById(R.id.tabs);
}

private void initValue() { 
//初始化值，新增每一個TableLayout裡的ArrayList，設定與標題欄一一對應的檢視（片段）集合

fragments = new ArrayList<>();
fragments.add(new xxxFragment());
fragments.add(new xxxFragment()); //有多少個fragment就在這裡新增多少

tabNames = new ArrayList<>(); //新增標題集合,同上
tabNames.add(" ");
tabNames.add(" ");

/*tabIcs = new ArrayList<>(); 此處尚不明確是否有，使用spanstring或其他方法此處是否需要
tabIcs.add(R.drawable.tab_xxx);
tabIcs.add(R.drawable.tab_xxx);*/

//給tabLayout新增選項卡
for(int i=0;i< fragments.size();i++){
tabLayout.addTab(tabLayout.newTab().setText((CharSequence) fragments.get(i)));
}

FragmentViewPagerAdapter adapter = new FragmentViewPagerAdapter
(getSupportFragmentManager(), fragments, tabNames,tabIcs); 
// 初始化ViewPager介面卡//此處需要增加與新增的集合以及上述定義的值匹配，若未定義則無需新增

viewPager.setAdapter(adapter); //給ViewPager設定介面卡
tabLayout.setupWithViewPager(viewPager);//將TabLayout和ViewPager關聯起來
/*setupWithViewPager這個方法會先將tab清除然後再根據ViewPager的adapter裡的count去取pagetitle，這也就是有時遇到用addTab方法新增tab不起作用的問題。*/

//setupTabIcons();
viewPager.setCurrentItem(1);
viewPager.setCurrentItem(0);
}

tab.addTab(tab,i == 0, ? true:false);

List<Fragment> xxxfragment;
List<String> titleList;

public MyTableViewAdapter(FragmentManager fm , List<Fragment> pagerList , List<String> titleList) {
super(fm);
this.pagerList = pagerList; // 此處使用this.與上述定義匹配

}

public Fragment getItem(int poition)
super.

public int getCount(int poition) { return (tab個數) } 
return xxxfragment.get(position); //普通情況
return xxxfragment != null ? pagerList.size() : 0; //設定不等於null的情況，參考[^4]

public long getItemId(int poition){ return super.getItemId(position) }
return xxxfragment.get(position);

public destoryItemId(View view contain,int poition,Object object)

@Override
public void onTabSelected(TabLayout.Tab tab) {
int position = tab.getPosition();

Fragment fragment = (Fragment)adapter.instantiateItem(container, position);

adapter.setPrimaryItem(container, pos, fragment);
adapter.finishUpdate(container);

}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {

public void setSpan(Object what, int start, int end, int flags) {
super.setSpan(what, start, end, flags);
//what:向這個超級字串中新增的內容。例如：前景色、背景色、圖片、連結、下劃線等
//start:開始的位置（0為開始）
//結束的位置
//flags:標識在span範圍內的文字前後輸入新的字元時是否也應用這個效果
}