CODEWITHSUNDEEP
androidandroid-edittext
Gaurav Anand
Gaurav Anand

Reputation: 11

Error in checking that Edit text in android is empty

I'm implementing a simple adder application. When I click the sum without entering any numbers the application crashes. Why? I defined the function such that when either num1 or num2 is empty it should print "Invalid---". Why is it crashing then?

When i click the sum without entering any number it crashes .Why? As i already defined function when either entry among num1 or num2 is empty it should print "Invalid---" .

Screenshot of the app

My java code for MainActivity is here:

import ...

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
}

public void onButtonClick(View v){
    EditText a = (EditText)findViewById(R.id.etNum1);
    EditText b = (EditText)findViewById(R.id.etNum2);
    TextView c =(TextView)findViewById(R.id.tvResult);

    String x=a.getText().toString();
    String y=b.getText().toString();

    if( (x!="" && y!="")) {
        int num1 = Integer.parseInt(x);
        int num2 = Integer.parseInt(y);
        int num3 = num1 + num2;
        c.setText("Good entry");
    }
    else{
        c.setText("Invalid num1 or num2");
    }
}

Upvotes: 0

Views: 260

Answers (1)

Saumik Bhattacharya
Saumik Bhattacharya

Reputation: 941

Can you please try using this --

if((!"".equals(x)) && (!"".equals(y))) {
  int num1 = Integer.parseInt(x);
  int num2 = Integer.parseInt(y);
  int num3 = num1 + num2;
  c.setText("Good entry");
}

Upvotes: 1

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