Predrag Antić
Lurker
I'm working on an application with some mathematical problems. I made a photo in the photoshop and under the image there is an editText and button. Everything is fine, but when I click the button when editText is empty the application crashes. I tried some solutions, but they did not help me. So if can anyone help me i would be grateful. 
Code:
public class Start1Activity extends AppCompatActivity {
Button btn;
public void displayResult(String result) {
Toast.makeText(Start1Activity.this, result, Toast.LENGTH_SHORT).show();
}
public void guess(View view){
final EditText EditText2 = (EditText) findViewById(R.id.editText2);
final int guessNumber = Integer.parseInt(EditText2.getText().toString());
if (guessNumber == 3 ){
displayResult("That's right! Click once again for next level");
btn = (Button) findViewById(R.id.bt3);
btn.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view){
if(EditText2.getText().toString().isEmpty()){
displayResult("Please enter some number");
}
Intent anythingintent=new Intent(Start1Activity.this,Start2Activity.class);
startActivity(anythingintent);
}
});
}
else{
displayResult("Wrong. Try again!");
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_start1);
}
}