以前做專案大多用的radiobutton,今天用tablayout來做一個tab切換頁面的的效果
實現的效果就是類似QQ.微信的頁面間(也就是Fragment間)的切換.如圖:

佈局只要一個tablayout

<android.support.design.widget.TabLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/nav_tl"

        app:tabIndicatorHeight="0dp"
 
//將指示器去掉 ps:如果大家對tablayout有一些樣式上的需求
        可以自定義style,這裡就不加了

        android:layout_gravity="bottom"

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

然後就是activity了

public class MainActivity extends BaseActivity implements TabLayout.OnTabSelectedListener{

    @BindView(R.id.main_container)
    LinearLayout mainContainer;
    @BindView(R.id.nav_tl)
    TabLayout navTl;
    //Tab 文字
 

    private final int[] TAB_TITLES = new int[]{R.string.nav_home,R.string.nav_order,R.string.nav_my};
    //Tab 圖片
    private final int[] TAB_IMGS = new int[]{R.drawable.nav_home_bg,R.drawable.nav_order_bg,R.drawable.nav_my_bg};
//貼出一個R.drawable.nav_home_bg的檔案,其他類似:`<?xml version="1.0" encoding="utf-8"?>
 

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_selected="true" android:drawable="@mipmap/nav_home_selected"></item>
    <item android:state_selected="false" android:drawable="@mipmap/nav_home_normal"></item>
</selector>`

    private FirstPagerFragment firstPagerFragment;
    private PersonalFragment personalFragment;
    private SeekOrderFragment seekOrderFragment;
    private android.support.v4.app.FragmentManager manager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);
        iniView();
        iniData();
    }

    private void iniData() {

    }

    private void iniView() {
        LayoutInflater inflater = LayoutInflater.from(this);
        manager = getSupportFragmentManager();

        getTab(R.id.main_container,manager,0);
        setTabs(navTl,inflater,TAB_TITLES,TAB_IMGS);

        navTl.setOnTabSelectedListener(this);
    }

    /**
     * @description: 設定新增Tab
     * 我們自定義的佈局customer_layout其實就是一張圖片加文字
     * `<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
    <ImageView
        android:id="@+id/img_tab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        />

    <TextView
        android:id="@+id/tv_tab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:textColor="@drawable/tv_color_bg"//text我用了一個顏色選擇器,主要在我選中的時候能改變顏色
        />

</LinearLayout>`
     */
    private void setTabs(TabLayout tabLayout, LayoutInflater inflater, int[] tabTitlees, int[] tabImgs) {
        for (int i = 0; i < tabImgs.length; i++) {

            TabLayout.Tab tab = tabLayout.newTab();
            View view = inflater.inflate(R.layout.customer_layout, null);
            tab.setCustomView(view);

            TextView tvTitle = (TextView) view.findViewById(R.id.tv_tab);
            tvTitle.setText(tabTitlees[i]);
            ImageView imgTab = (ImageView) view.findViewById(R.id.img_tab);
            imgTab.setImageResource(tabImgs[i]);
            tabLayout.addTab(tab);

        }
    }

    @Override
    public void onTabSelected(TabLayout.Tab tab) {
        getTab(R.id.main_container,manager,tab.getPosition());
    }

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

    }

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

    }
    //設定tab的監聽,選中某一個tab對應的Fragment要及時切換,相信大家看程式碼能看明白
    private void getTab(int container, android.support.v4.app.FragmentManager manager, int position){
        FragmentTransaction ft = manager.beginTransaction();
        hideAll(ft);
        switch (position){
            case 0:
                if(firstPagerFragment==null){
                    firstPagerFragment=new FirstPagerFragment();
                    ft.add(container,firstPagerFragment);
                }else {
                    ft.show(firstPagerFragment);
                }
                break;

            case 1:
                if(seekOrderFragment==null){
                    seekOrderFragment=new SeekOrderFragment();
                    ft.add(container,seekOrderFragment);
                }else {
                    ft.show(seekOrderFragment);
                }
                break;
            case 2:
                if(personalFragment==null){
                    personalFragment=new PersonalFragment();
                    ft.add(container,personalFragment);
                }else {
                    ft.show(personalFragment);
                }
                break;
        }

        ft.commit();
    }

    private void hideAll(FragmentTransaction ft) {
        if(firstPagerFragment!=null){
            ft.hide(firstPagerFragment);
        }
        if(personalFragment!=null){
            ft.hide(personalFragment);
        }
        if(seekOrderFragment!=null){
            ft.hide(seekOrderFragment);
        }
    }
}