package com.mouseboy.assignment1; import android.os.Bundle; import android.view.View; import androidx.activity.EdgeToEdge; import androidx.appcompat.app.AppCompatActivity; import androidx.core.graphics.Insets; import androidx.core.view.ViewCompat; import androidx.core.view.WindowInsetsCompat; import java.math.BigDecimal; import java.text.DecimalFormat; import java.text.DecimalFormatSymbols; import java.util.ArrayList; public class MainCalculatorActivity extends AppCompatActivity { // I missing having decltype already public static final ArrayList buttonIDs = new ArrayList<>(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); EdgeToEdge.enable(this); setContentView(R.layout.activity_main_calculator); ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main), (v, insets) -> { Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars()); v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom); return insets; }); // evil. buttonIDs.add(R.id.b0); buttonIDs.add(R.id.b1); buttonIDs.add(R.id.b2); buttonIDs.add(R.id.b3); buttonIDs.add(R.id.b4); buttonIDs.add(R.id.b5); buttonIDs.add(R.id.b6); buttonIDs.add(R.id.b7); buttonIDs.add(R.id.b8); buttonIDs.add(R.id.b9); buttonIDs.add(R.id.bac); buttonIDs.add(R.id.bc); buttonIDs.add(R.id.bplus); buttonIDs.add(R.id.bdiv); buttonIDs.add(R.id.bminus); buttonIDs.add(R.id.bmul); buttonIDs.add(R.id.bdot); buttonIDs.add(R.id.bneg); buttonIDs.add(R.id.bequals); buttonIDs.add(R.id.bpar); } }