7 PM – Intro To Java – Darin

Today We Did:

1. Continued in Android Studio, implementing the function for the convert button.
2. Learnt how to grab UI elements in code by id, and manipulate them using getText and setText.

Homework:

1. Complete the method below inside of MainActivity.java: Grab the other EditText UI element and use .setText() on it to set it with the calculated value for the Celsius.

public void convertButtonOnClick(View view) {
    // findViewById will grab the UI (user interface) element by its ID
    EditText originalTempValue = findViewById(R.id.originalTempValue);
    String originalTempStr = originalTempValue.getText().toString();

    // Double.parseDouble(string value)
    // String.valueOf(   int/double value   )


    // convert the String originalTempStr to a double, and then
    // convert it to its celsius version with the formula:
    // celsius = (fahrenheit - 32) * 5/9

    // and then, GRAB the other EditText and name it convertedTempValue, and use
    // convertedTempValue.setText(  celsius (as a string)   )

    System.out.println(originalTempStr);
}

Notes:

Email me at ddjapri@ayclogic.com if you have any questions.