一、xml布局文件:
添加TabHost控件
<?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MainActivity"><TabHostandroid:id="@android:id/tabhost"android:layout_width="match_parent"android:layout_height="match_parent"tools:layout_editor_absoluteX="140dp"tools:layout_editor_absoluteY="253dp"><LinearLayoutandroid:layout_width="match_parent"android:layout_height="match_parent"and