[code]
package example.javatpoint.com.sumoftwonumber;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
private EditText edittext1, edittext2;
private Button buttonSum;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
addListenerOnButton();
}
public void addListenerOnButton() {
edittext1 = (EditText) findViewById(R.id.editText1);
edittext2 = (EditText) findViewById(R.id.editText2);
buttonSum = (Button) findViewById(R.id.button);
buttonSum.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String value1=edittext1.getText().toString();
String value2=edittext2.getText().toString();
int a=Integer.parseInt(value1);
int b=Integer.parseInt(value2);
int sum=a+b;
Toast.makeText(getApplicationContext(),String.valueOf(sum), Toast.LENGTH_LONG).show();
}
});
}
} [/code]
