Modification of Android Tablayout icon

In Tablayout in android v7, tabItem can directly set an icon, but no matter what the size of your picture is, it will make you a small icon, which sometimes cannot achieve the effect on the UI.

The effect of setting the icon directly on the TabItem: , xml:

<android.support.design.widget.TabLayout
    app:tabIndicatorHeight="0dp"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <android.support.design.widget.TabItem
        android:icon="@drawable/ic_relative_true"
        android:text="hello"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <android.support.design.widget.TabItem
        android:icon="@drawable/ic_relative_true"
        android:text="hello"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <android.support.design.widget.TabItem
        android:icon="@drawable/ic_relative_true"
        android:text="hello"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

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

The rendering is:

Implementation 1. XML: item_tab (here you can directly set the selected state of pictures and text):

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:gravity="center"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <ImageView
        android:id="@+id/iv"
        android:src="@drawable/ic_relative_true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    
    <TextView
        android:layout_marginTop="3dp"
        android:textColor="@color/font2"
        android:id="@+id/tv"
        android:textSize="13sp"
        android:text="title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    
</LinearLayout>

2.JAVA:

private void init() {
    title.setText("行业中心");
    
    if (list == null) {
        list = new ArrayList<>(3);
        list.add(new HardNewFragment());
        list.add(new ShortMsgFragment());
        list.add(new RelativeFragment());
    }
    if (adapter == null) {
        adapter = new FVAdapter(getChildFragmentManager(), list);
    }
    industryPager.setAdapter(adapter);
    industryTab.setupWithViewPager(industryPager);
    industryPager.setCurrentItem(0);

    //设置TabItem的View(一定要在设置完适配器之后进行设置)
    industryTab.getTabAt(0).setCustomView(getview("要闻", R.drawable.hardnews_state));
    industryTab.getTabAt(1).setCustomView(getview("短讯", R.drawable.ic_short_msg));
    industryTab.getTabAt(2).setCustomView(getview("相关", R.drawable.ic_relative_state));
}

//创建Tablayout的CustomView
private View getview(String title, int icon) {
    View view = LayoutInflater.from(getActivity()).inflate(R.layout.item_view, null);
    TextView tv = view.findViewById(R.id.tv);
    ImageView iv = view.findViewById(R.id.iv);
    tv.setText(title);
    iv.setImageResource(icon);
    return view;
}