FragmentTabHost使用

文章目录

布局:
需要FragmentTabHost和一个容纳tab实际类容的view 如下

<?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">

    <FrameLayout
        android:id="@+id/realtabcontent"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"/>

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

        <View
            android:layout_width="match_parent"
            android:layout_height="1px"
            android:background="#dfdfdf" />

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

    </LinearLayout>


</LinearLayout>

测试代码:

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_myfragment_tab);

        // 初始化fragmentTabHost, R.id.realtabcontent为tab内容的id,如果不传的话,需要在setcontent中指定
        fragmentTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent);

        String[] tabTitles = new String[]{"user", "discover", "repo", "more"};

        for (String title : tabTitles) {
            // 通过fragmentTabHost的newTabSpec创建TabSpec
            TabHost.TabSpec tabSpec = fragmentTabHost.newTabSpec(title);

            View indicator = LayoutInflater.from(this).inflate(R.layout.tab_title, null);

            TextView titleView = (TextView)indicator.findViewById(R.id.tab_title);
            Drawable drawable = ContextCompat.getDrawable(this, R.drawable.tab_discovery_nor);
            drawable.setBounds(0,0,40,40);
            titleView.setCompoundDrawablesWithIntrinsicBounds(null, drawable, null, null);
            titleView.setText(title);

            // setIndicator传入view或者字符串和图标
            tabSpec.setIndicator(titleView);

            // 传入viewId,intent,或者TabContentFactory,实现生成tab内容view的函数
            //TabContentFactory参数无用 addTab会覆盖该值(查看源码发现)
            //tabSpec.setContent(new TabHost.TabContentFactory() {
            //    @Override
            //    public View createTabContent(String tag) {
            //        return new View(MyFragmentTab.this);
            //    }
            //});

            Bundle args = new Bundle();
            args.putString(TestFragment.CONTENT_KEY, title);
            fragmentTabHost.addTab(tabSpec, TestFragment.class, args);
        }

        fragmentTabHost.setOnTabChangedListener(new TabHost.OnTabChangeListener() {
            @Override
            public void onTabChanged(String tabId) {
                Toast.makeText(MyFragmentTab.this, tabId, Toast.LENGTH_SHORT).show();
            }
        });
    }