Java Simple number game App crashes when EditText is empty

Turwaith :

I have made a simple Android app, where the app creates a number between 1 and 20 and the user has to guess it. Everything works fine, except one thing: When I let the EditText empty, the App crashes instantly when I press the Button. How can I prevent that? I tried an if-else Argument at the point where the entered Text of the EditText is given to the global created editText Variable editTextGuess, but then the app crashed instantly after launch.

What do I have to Code, that the app does not crash caused by the empty textfield but creates a toast saying "Oops, your Textfield is empty"?

package com.example.randomness;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

import java.util.Random;

public class MainActivity extends AppCompatActivity {

    //Den EditText und den Integer für die zufällige Zahl global erstellen
    EditText editTextGuess;
    int RandomNumber;

    //Hier einen Void eröffnen, um die zufällige Zahl zu erstellen
    public void generateRandomNumber(){
        Random random = new Random();

        RandomNumber = random.nextInt(20) +1;
    }

    //Erstellen der OnClick Methode für den Button, View view ist wichtig!
    public void guess(View view){
        Log.i("Button clicked", "Worked!");

        int guessValue;
        guessValue = Integer.parseInt(editTextGuess.getText().toString());
        Log.i("Entered Value:", Integer.toString(guessValue));
        Log.i("The random number is:", Integer.toString(RandomNumber));


        String message;

        if(guessValue > RandomNumber){
            message = "Your guessed number is too high!";
        } else if(guessValue < RandomNumber){
            message = "Your guessed number is too low!";
        } else if(guessValue == RandomNumber){
            message = "You were right! Let's play again!";
            generateRandomNumber();
            Log.i("Info", "New random number created");
        } else {
            message = "Something went wrong...";
        }

        Toast.makeText(this, message, Toast.LENGTH_LONG).show();

    }

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

        editTextGuess = findViewById(R.id.editTextRaten);
        generateRandomNumber();

    }
}

Zankrut Parmar :

Check your edit text string value before assigning it to the variable.

public void guess(View view){
    Log.i("Button clicked", "Worked!");

    int guessValue;
    if(!editTextGuess.getText().toString().equals("")){
        guessValue = Integer.parseInt(editTextGuess.getText().toString());
        Log.i("Entered Value:", Integer.toString(guessValue));
        Log.i("The random number is:", Integer.toString(RandomNumber));


        String message;

        if(guessValue > RandomNumber){
            message = "Your guessed number is too high!";
        } else if(guessValue < RandomNumber){
            message = "Your guessed number is too low!";
        } else if(guessValue == RandomNumber){
            message = "You were right! Let's play again!";
            generateRandomNumber();
            Log.i("Info", "New random number created");
        } else {
            message = "Something went wrong...";
        }

        Toast.makeText(this, message, Toast.LENGTH_LONG).show();
    }  else {
        Toast.makeText(this, "Oops, your Textfield is empty", Toast.LENGTH_LONG).show();
    }

}