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merge into: Lew/Assignment_1:Part1
Branches Tags
Lew/Assignment_1:main Lew/Assignment_1:Part1 Lew/Assignment_1:Part2
..
pull from: Lew/Assignment_1:Part2
Branches Tags
Lew/Assignment_1:Part1 Lew/Assignment_1:Part2 Lew/Assignment_1:main
3 Commits
Part1 .. Part2
Author SHA1 Message Date
Rapturate 4e44a1f8b0 Validation: Added Toast messages for empty or invalid input 2026-08-28 10:48:46 -04:00
Rapturate 88e1f88a14 UI: Refactored Part2 to use RadioButtons and a single Calculate button 2026-08-28 10:47:01 -04:00
Rapturate b4752dabc7 Updated the layout for Part2 2026-08-28 10:43:24 -04:00
2 changed files with 63 additions and 59 deletions
Expand all files Collapse all files
app/src/main/java/com/example/assignmentone/MainActivity.java
+19 -36
View File
@@ -1,16 +1,12 @@
/*
Assignment 1 (part1)
Assignment_1
Lew Price
*/
package com.example.assignmentone;
import android.annotation.SuppressLint;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.TextView;
import android.widget.Toast;
import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;
@@ -34,12 +30,12 @@ public class MainActivity extends AppCompatActivity {
});
TextInputLayout tempInput = findViewById(R.id.inputLayoutTemp);
Button CtoF = findViewById(R.id.but_cToF);
Button FtoC = findViewById(R.id.but_fToC);
RadioButton radCtoF = findViewById(R.id.radBut_CtoF);
Button calculate = findViewById(R.id.but_calc);
Button reset = findViewById(R.id.but_reset);
TextView result = findViewById(R.id.result);
CtoF.setOnClickListener(new View.OnClickListener(){
calculate.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
@@ -48,39 +44,26 @@ public class MainActivity extends AppCompatActivity {
String userInput = tempInput.getEditText().getText().toString().trim();
if(userInput.isEmpty()) {
tempInput.setError("Please enter a temperature");
Toast.makeText(MainActivity.this, "Error: No value entered", Toast.LENGTH_SHORT).show();
return;
}
try {
double c = Double.parseDouble(userInput);
double f = c * (9.0/5.0) + 32;
@SuppressLint("DefaultLocale") String resultString = String.format("%.2f °F", f);
result.setText(resultString);
} catch (NumberFormatException e) {
tempInput.setError("Invalid number format");
}
}
});
FtoC.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
tempInput.setError(null);
if (tempInput.getEditText() == null) return;
String userInput = tempInput.getEditText().getText().toString().trim();
if(userInput.isEmpty()) {
tempInput.setError("Please enter a temperature");
return;
}
try {
double f = Double.parseDouble(userInput);
double c = (5.0/9.0)*(f-32);
@SuppressLint("DefaultLocale") String resultString = String.format("%.2f °C", c);
result.setText(resultString);
double inputTemp = Double.parseDouble(userInput);
if (radCtoF.isChecked()) {
// Celsius to Fahrenheit
double f = inputTemp * (9.0/5.0) + 32;
@SuppressLint("DefaultLocale") String resultString = String.format("%.2f °F", f);
result.setText(resultString);
} else {
// Fahrenheit to Celsius
double c = (5.0/9.0) * (inputTemp - 32);
@SuppressLint("DefaultLocale") String resultString = String.format("%.2f °C", c);
result.setText(resultString);
}
} catch (NumberFormatException e) {
tempInput.setError("Invalid number format");
Toast.makeText(MainActivity.this, "Error: Invalid number or special characters", Toast.LENGTH_SHORT).show();
}
}
});
app/src/main/res/layout/activity_main.xml
+44 -23
View File
@@ -74,49 +74,70 @@
app:layout_constraintStart_toEndOf="@+id/text_conversion"
app:layout_constraintTop_toTopOf="@+id/text_conversion" />
<Button
android:id="@+id/but_cToF"
android:layout_width="0dp"
<TextView
android:id="@+id/txt_select"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="24dp"
android:layout_marginEnd="16dp"
android:backgroundTint="#A9A7A7"
android:text="C to F"
android:textColor="#FFFFFF"
app:cornerRadius="0dp"
app:layout_constraintEnd_toEndOf="parent"
android:text="Select Conversion:"
android:textSize="18sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/text_conversion" />
<Button
android:id="@+id/but_fToC"
android:layout_width="0dp"
<RadioGroup
android:id="@+id/radioGroup"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp"
android:layout_marginTop="8dp"
android:backgroundTint="#A9A7A7"
android:text="F to C"
android:textColor="#FFFFFF"
app:cornerRadius="0dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/but_cToF" />
app:layout_constraintTop_toBottomOf="@+id/txt_select">
<RadioButton
android:id="@+id/radBut_CtoF"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="C to F"
android:checked="true" />
<RadioButton
android:id="@+id/radBut_FtoC"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="F to C" />
</RadioGroup>
<Button
android:id="@+id/but_reset"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp"
android:layout_marginTop="8dp"
android:layout_marginTop="24dp"
android:layout_marginEnd="8dp"
android:backgroundTint="#A9A7A7"
android:text="Reset"
android:textColor="#FFFFFF"
app:cornerRadius="0dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintEnd_toStartOf="@+id/but_calc"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/but_fToC" />
app:layout_constraintTop_toBottomOf="@+id/radioGroup" />
<Button
android:id="@+id/but_calc"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="24dp"
android:layout_marginEnd="16dp"
android:backgroundTint="#A9A7A7"
android:text="Calculate"
android:textColor="#FFFFFF"
app:cornerRadius="0dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/but_reset"
app:layout_constraintTop_toBottomOf="@+id/radioGroup" />
</androidx.constraintlayout.widget.ConstraintLayout>