remove unnecessary UI files

Author: johnnzhou

app/src/main/java/com/lcl/lclmeasurementtool/FirstFragment.java

@@ -1,76 +1,14 @@
 package com.lcl.lclmeasurementtool;
 
-import android.os.Bundle;
-
-import com.google.android.material.snackbar.Snackbar;
-
 import androidx.appcompat.app.AppCompatActivity;
 
-import android.view.View;
-
-import androidx.navigation.NavController;
-import androidx.navigation.Navigation;
-import androidx.navigation.ui.AppBarConfiguration;
-import androidx.navigation.ui.NavigationUI;
-
-import com.lcl.lclmeasurementtool.databinding.ActivityMainBinding;
-
-import android.view.Menu;
-import android.view.MenuItem;
+import android.os.Bundle;
 
 public class MainActivity extends AppCompatActivity {
 
-    private AppBarConfiguration appBarConfiguration;
-    private ActivityMainBinding binding;
-
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-
-        binding = ActivityMainBinding.inflate(getLayoutInflater());
-        setContentView(binding.getRoot());
-
-        setSupportActionBar(binding.toolbar);
-
-        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment_content_main);
-        appBarConfiguration = new AppBarConfiguration.Builder(navController.getGraph()).build();
-        NavigationUI.setupActionBarWithNavController(this, navController, appBarConfiguration);
-
-        binding.fab.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
-                        .setAction("Action", null).show();
-            }
-        });
-    }
-
-    @Override
-    public boolean onCreateOptionsMenu(Menu menu) {
-        // Inflate the menu; this adds items to the action bar if it is present.
-        getMenuInflater().inflate(R.menu.menu_main, menu);
-        return true;
-    }
-
-    @Override
-    public boolean onOptionsItemSelected(MenuItem item) {
-        // Handle action bar item clicks here. The action bar will
-        // automatically handle clicks on the Home/Up button, so long
-        // as you specify a parent activity in AndroidManifest.xml.
-        int id = item.getItemId();
-
-        //noinspection SimplifiableIfStatement
-        if (id == R.id.action_settings) {
-            return true;
-        }
-
-        return super.onOptionsItemSelected(item);
-    }
-
-    @Override
-    public boolean onSupportNavigateUp() {
-        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment_content_main);
-        return NavigationUI.navigateUp(navController, appBarConfiguration)
-                || super.onSupportNavigateUp();
+        setContentView(R.layout.activity_main);
     }
 }

app/src/main/java/com/lcl/lclmeasurementtool/MainActivity.java

@@ -1,33 +1,18 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<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">
 
-    <com.google.android.material.appbar.AppBarLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:theme="@style/Theme.LCLMeasurementTool.AppBarOverlay">
-
-        <androidx.appcompat.widget.Toolbar
-            android:id="@+id/toolbar"
-            android:layout_width="match_parent"
-            android:layout_height="?attr/actionBarSize"
-            android:background="?attr/colorPrimary"
-            app:popupTheme="@style/Theme.LCLMeasurementTool.PopupOverlay" />
-
-    </com.google.android.material.appbar.AppBarLayout>
-
-    <include layout="@layout/content_main" />
-
-    <com.google.android.material.floatingactionbutton.FloatingActionButton
-        android:id="@+id/fab"
+    <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_gravity="bottom|end"
-        android:layout_margin="@dimen/fab_margin"
-        app:srcCompat="@android:drawable/ic_dialog_email" />
+        android:text="Hello World!"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
 
-</androidx.coordinatorlayout.widget.CoordinatorLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>