CODEWITHSUNDEEP
javaandroid
Caroso
Caroso

Reputation: 111

connection between algorithm and application android

I'm coming with an unusual question, I think. I made a program which calculate the difference between two dates in java, and I want to make an android application with this program.

This is what I did until now: enter image description here

enter image description here

I'm begginer in Android development and my question is how I can do the connection between the algorithm and the application. I know that when the user will push the button "calculate" an event is triggered and the result should be displayed on the screen. I don't know how to make the connection between algorithm and the design part of the application.

Upvotes: 0

Views: 93

Answers (3)

Евгений Суетин
Евгений Суетин

Reputation: 226

In MainActivity make private variable 

private Button calculateBtn;
private EditText startDate;
private EditText endDate;
private TextView result;

in OnCreate():

calculateBtn = (Button) findViewById(R.id.**[youIdButton]**);
startDate = (EditText) findViewById(R.id.**[endDate]**);
endDate = (EditText) findViewById(R.id.**[endDate]**);
result = () findViewById(R.id.**[result]**);

calculate.setOnClickListener(new OnClickListener(){

       result.setText(calculate(startDate.getText().toString(), endDate.getText().toString()));
});

in MainActivity class make method 

private String calculate(String startDate, String endDate)){
     //calc
}

Upvotes: 1

Alex Shutov
Alex Shutov

Reputation: 3282

You should instantiate you algorithm's class in Activity. find your button and set click listener, in which algorithm will be triggered. Create EditText references in your activity and bind thise to text fields.

Upvotes: 1

Alexandre Martin
Alexandre Martin

Reputation: 1502

You can make a java function with it like

public String CalculateTime(String startDate, String endDate)
{

    //convert

    //calculate

    //convert result

    //return statement


}

Call this function from the button onClick event, get the result and then set the TextView text value.

Upvotes: 1

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