如何解决简单猜猜android studio上的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猜数字游戏。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会检查它是否与生成的随机数匹配。你有 5 次机会,如果你弄错了,它会从 5 中扣除一次尝试。当我按下重试时,我想要重置随机数和尝试计数。 XML文件如下 [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>
这是我的主要java文件
package com.example.myapplication;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import java.util.Random;
import java.util.Scanner;
public class MainActivity extends AppCompatActivity {
Random random = new Random();
int number = random.nextInt(20);
int tries = 5;
TextView result = findViewById(R.id.textView);
EditText confirm = findViewById(R.id.editTextTextPersonName);
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
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;
}
}
我似乎无法找到问题所在。一切似乎都很好,但 apk force 关闭了。在此先感谢您的帮助。
Edit: i checked all the ide given errors. I corrected those. Still its not running
[1]: https://i.stack.imgur.com/5K6ZE.png
解决方法
findViewById 应该在 onCreate 中,请尝试以这种方式使用它!如果仍然崩溃,请转到下方的“运行”选项卡,并从那里共享错误。 如果此解决方案对您有帮助,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;
}
}
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