Java android studio上的简单猜数字游戏应用程序。在我的物理设备中运行apk时，它会立即强制关闭

我正在做一个简单的数字游戏。我希望它在开始时生成一个随机数。然后，当我输入一个数字并确认它时，将检查它是否与生成的随机数匹配。你有5次机会，当你犯错时，它会从5次中扣除一次尝试。当我按retry时，我希望随机数和try计数复位。 下面给出了XML文件 [这是应用程序布局][1]

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:fontFamily="cursive"
        android:text="@string/the_guessing_game"
        android:textColor="#519169"
        android:textSize="36sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.474"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.074" />

    <EditText
        android:id="@+id/editTextTextPersonName"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="372dp"
        android:ems="10"
        android:inputType="textPersonName"
        android:text="@string/number"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.497"
        app:layout_constraintStart_toStartOf="parent"
        android:autofillHints="" />

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/are_you_ready_guess_a_number_between_1_20_and_confirm"
        app:layout_constraintBottom_toTopOf="@+id/editTextTextPersonName"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.495"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.888" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/confirm"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editTextTextPersonName"
        app:layout_constraintVertical_bias="0.259"
        android:onClick="onConfirmClick"/>

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:text="@string/retry"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.976"
        android:onClick="onRetryClick"/>

</androidx.constraintlayout.widget.ConstraintLayout>

我似乎找不到问题所在。一切似乎都很好，但apk部队关闭了。提前感谢您的帮助

Edit: i checked all the ide given errors. I corrected those. Still its not running

  [1]: https://i.stack.imgur.com/5K6ZE.png

---

findViewById应该在创建后进入，请尝试以这种方式使用它！若你们仍然遇到崩溃，那个么转到下面的“运行”选项卡，并从那个里分享错误。 如果此决议有助于您，请标记为正确。 谢谢

public class MainActivity extends AppCompatActivity {
Random random = new Random();
int number = random.nextInt(20);
int tries = 5;

TextView result;
EditText confirm;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
result = findViewById(R.id.textView);
confirm = findViewById(R.id.editTextTextPersonName);
}

public void onConfirmClick (View view){
    int pass = Integer.parseInt(confirm.getText().toString());
    if (tries >= 0) {
        confirm.setText("Sorry your chances are over. Please retry");
    } else {
        if (pass != number) {
            tries = tries - 1;
            confirm.setText("That's kinda wrong. chances remaining: " + tries);

        } else if (pass == number) {
            confirm.setText("NICE. your answer is correct!. press retry to play again.");

        } else {
            confirm.setText("Don't you understand what a number is?");
        }

    }

    }

public void onRetryClick (View view){
    number = random.nextInt(20);
    tries = 5;
    }
}

---

检查控制台。您可以找到导致崩溃的错误和代码行。修复了它和它的运行。我不知道我必须先定义变量，但从另一个类的输入中获取数据。非常感谢你！欢迎@androiddeveloper

public class MainActivity extends AppCompatActivity {
Random random = new Random();
int number = random.nextInt(20);
int tries = 5;

TextView result;
EditText confirm;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
result = findViewById(R.id.textView);
confirm = findViewById(R.id.editTextTextPersonName);
}

public void onConfirmClick (View view){
    int pass = Integer.parseInt(confirm.getText().toString());
    if (tries >= 0) {
        confirm.setText("Sorry your chances are over. Please retry");
    } else {
        if (pass != number) {
            tries = tries - 1;
            confirm.setText("That's kinda wrong. chances remaining: " + tries);

        } else if (pass == number) {
            confirm.setText("NICE. your answer is correct!. press retry to play again.");

        } else {
            confirm.setText("Don't you understand what a number is?");
        }

    }

    }

public void onRetryClick (View view){
    number = random.nextInt(20);
    tries = 5;
    }
}