11.8.2

code/layout/activity_main.xml

@@ -9,7 +9,6 @@
     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="Hello World!"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintRight_toRightOf="parent"

code/tooth/MainActivity.java

@@ -1,10 +1,12 @@
 package com.example.tooth;
 
-import androidx.appcompat.app.AppCompatActivity;
 
+
+import android.app.Activity;
 import android.os.Bundle;
 
-public class MainActivity extends AppCompatActivity {
+
+public class MainActivity extends Activity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {

code/tooth/SplashActivity.java

@@ -1,13 +1,14 @@
 package com.example.tooth;
 
-import androidx.appcompat.app.AppCompatActivity;
 
+
+import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.os.Handler;
 import android.view.WindowManager;
 
-public class SplashActivity extends AppCompatActivity {
+public class SplashActivity extends Activity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {