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저는 Udacity Beginners 과정의 JustJava 앱을 사용하는 새로운 Android 개발자입니다. 내 전화를 사용하여 코드를 디버그하여 가격을 업데이트하기 위해 버튼을 클릭하면 "유감스럽게도 JustJava가 중지되었습니다."라는 오류가 발생합니다.내 앱이 고장났습니다. 안타깝게도 앱이 중지되었습니다.
의 AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.android.justjava">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="justjava"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
MainActivity.java
import android.icu.text.NumberFormat;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.RequiresApi;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.TextView;
/**
* This app displays an order form to order coffee.
*/
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
/**
* This method is called when the order button is clicked.
*/
public void submitOrder(View view) {
display(2);
displayPrice(2 * 5);
}
/**
* This method displays the given quantity value on the screen.
*/
private void display(int number) {
TextView quantityTextView = (TextView)
findViewById(R.id.quantity_text_view);
quantityTextView.setText("" + number);
}
/**
* *This method displays the given price on the screen.
*/
private void displayPrice(int number) {
TextView priceTextView = (TextView)
findViewById(R.id.price_text_view);
priceTextView.setText
(NumberFormat.getCurrencyInstance().format(number));
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
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"
android:orientation="vertical"
tools:context="com.example.android.justjava.MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="quantity"
android:textAllCaps="true"
android:padding="16dp" />
<TextView
android:id="@+id/quantity_text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="0"
android:textSize="16sp"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:textColor="@android:color/black"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Price"
android:textAllCaps="true"
android:padding="16dp" />
<TextView
android:id="@+id/price_text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="NGN0"
android:textSize="16sp"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:textColor="@android:color/black"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="ORDER"
android:layout_margin="16dp"
android:onClick="submitOrder"/>
</LinearLayout>
로그 캣 오류 :
04-25 09:22:04.944 449-449/com.example.android.justjava E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.android.justjava, PID: 449
java.lang.IllegalStateException: Could not execute method for android:onClick
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293)
at android.view.View.performClick(View.java:4470)
at android.view.View$PerformClick.run(View.java:18773)
at android.os.Handler.handleCallback(Handler.java:808)
at android.os.Handler.dispatchMessage(Handler.java:103)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:5341)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:830)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:646)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
at android.view.View.performClick(View.java:4470)
at android.view.View$PerformClick.run(View.java:18773)
at android.os.Handler.handleCallback(Handler.java:808)
at android.os.Handler.dispatchMessage(Handler.java:103)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:5341)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:830)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:646)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NoClassDefFoundError: android.icu.text.NumberFormat
at com.example.android.justjava.MainActivity.displayPrice(MainActivity.java:49)
at com.example.android.justjava.MainActivity.submitOrder(MainActivity.java:33)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
at android.view.View.performClick(View.java:4470)
at android.view.View$PerformClick.run(View.java:18773)
at android.os.Handler.handleCallback(Handler.java:808)
at android.os.Handler.dispatchMessage(Handler.java:103)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:5341)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
어디에서 이러한 메서드를 호출합니까? –
Android 에뮬레이터에서 실행 해 보셨습니까? 그것은 당신의 장치가'android.icu.text.NumberFormat'이 무엇인지 알지 못하는 것 같습니다. 스택 추적에서 볼 수 있습니다 :'java.lang.NoClassDefFoundError : android.icu.text.NumberFormat'. 문서에 따르면 API 수준 24에서만 추가되었습니다. https://developer.android.com/reference/android/icu/text/NumberFormat.html – infl3x
알겠습니다. 고맙습니다 @davidxxx – JEDiTech