onClick crash Ресурсы $ NotFoundException

Question

Я создаю приложение для вычисления мощности микроволновой энергии в Android Studio. Я только что скачал это сегодня и ничего не писал для Android раньше.

В моем коде пока нет ошибок, когда я запускаю приложение на своем телефоне, его сила закрывается, когда я нажимаю кнопку «Расчет» со следующей ошибкой в ​​журнале.

01-09 02:33:43.885 12397-12397/com.microwave D/OpenGLRenderer﹕ Enabling debug mode 0 
01-09 02:33:48.319 12397-12397/com.microwave W/IInputConnectionWrapper﹕ beginBatchEdit on inactive InputConnection 
01-09 02:33:48.319 12397-12397/com.microwave W/IInputConnectionWrapper﹕ endBatchEdit on inactive InputConnection 
01-09 02:33:48.870 12397-12397/com.microwave W/IInputConnectionWrapper﹕ beginBatchEdit on inactive InputConnection 
01-09 02:33:48.870 12397-12397/com.microwave W/IInputConnectionWrapper﹕ endBatchEdit on inactive InputConnection 
01-09 02:33:50.591 12397-12397/com.microwave W/IInputConnectionWrapper﹕ beginBatchEdit on inactive InputConnection 
01-09 02:33:50.591 12397-12397/com.microwave W/IInputConnectionWrapper﹕ endBatchEdit on inactive InputConnection 
01-09 02:33:51.862 12397-12397/com.microwave W/IInputConnectionWrapper﹕ beginBatchEdit on inactive InputConnection 
01-09 02:33:51.862 12397-12397/com.microwave W/IInputConnectionWrapper﹕ endBatchEdit on inactive InputConnection 
01-09 02:33:53.404 12397-12397/com.microwave W/ResourceType﹕ No known package when getting value for resource number 0xffffff38 
01-09 02:33:53.404 12397-12397/com.microwave D/AndroidRuntime﹕ Shutting down VM 
01-09 02:33:53.404 12397-12397/com.microwave W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x41ed6d40) 
01-09 02:33:53.414 12397-12397/com.microwave E/AndroidRuntime﹕ FATAL EXCEPTION: main 
    Process: com.microwave, PID: 12397 
    java.lang.IllegalStateException: Could not execute method of the activity 
      at android.view.View$1.onClick(View.java:3823) 
      at android.view.View.performClick(View.java:4438) 
      at android.view.View$PerformClick.run(View.java:18422) 
      at android.os.Handler.handleCallback(Handler.java:733) 
      at android.os.Handler.dispatchMessage(Handler.java:95) 
      at android.os.Looper.loop(Looper.java:136) 
      at android.app.ActivityThread.main(ActivityThread.java:5034) 
      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:1270) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1086) 
      at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:132) 
      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.view.View$1.onClick(View.java:3818) 
            at android.view.View.performClick(View.java:4438) 
            at android.view.View$PerformClick.run(View.java:18422) 
            at android.os.Handler.handleCallback(Handler.java:733) 
            at android.os.Handler.dispatchMessage(Handler.java:95) 
            at android.os.Looper.loop(Looper.java:136) 
            at android.app.ActivityThread.main(ActivityThread.java:5034) 
            at java.lang.reflect.Method.invokeNative(Native Method) 
            at java.lang.reflect.Method.invoke(Method.java:515) 
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1270) 
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1086) 
            at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:132) 
            at dalvik.system.NativeStart.main(Native Method) 
    Caused by: android.content.res.Resources$NotFoundException: String resource ID #0xffffff38 
      at android.content.res.Resources.getText(Resources.java:244) 
      at android.content.res.XResources.getText(XResources.java:696) 
      at android.widget.TextView.setText(TextView.java:3888) 
      at com.microwave.MainActivity.calculate(MainActivity.java:62) 
            at java.lang.reflect.Method.invokeNative(Native Method) 
            at java.lang.reflect.Method.invoke(Method.java:515) 
            at android.view.View$1.onClick(View.java:3818) 
            at android.view.View.performClick(View.java:4438) 
            at android.view.View$PerformClick.run(View.java:18422) 
            at android.os.Handler.handleCallback(Handler.java:733) 
            at android.os.Handler.dispatchMessage(Handler.java:95) 
            at android.os.Looper.loop(Looper.java:136) 
            at android.app.ActivityThread.main(ActivityThread.java:5034) 
            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:1270) 
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1086) 
            at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:132) 
            at dalvik.system.NativeStart.main(Native Method) 

Вот остальная часть кода и XML. Я предполагаю, что у меня есть что-то очень простое, поскольку я просто использую предварительные базовые знания Java и ничего не знаю об андроиде.

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" 
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity"> 

    <LinearLayout 
     android:orientation="vertical" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:layout_alignParentTop="true" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentStart="true"> 

     <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:textAppearance="?android:attr/textAppearanceLarge" 
      android:text="Recipe Power" 
      android:id="@+id/textView" /> 

     <EditText 
      android:layout_width="106dp" 
      android:layout_height="wrap_content" 
      android:inputType="number" 
      android:ems="10" 
      android:id="@+id/recipeP" 
      android:layout_gravity="right" 
      android:enabled="true" /> 

     <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:textAppearance="?android:attr/textAppearanceLarge" 
      android:text="Microwave Power" 
      android:id="@+id/textView2" /> 

     <EditText 
      android:layout_width="106dp" 
      android:layout_height="wrap_content" 
      android:inputType="number" 
      android:ems="10" 
      android:id="@+id/microwaveP" 
      android:layout_gravity="right" /> 

     <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:textAppearance="?android:attr/textAppearanceLarge" 
      android:text="Recipe Time" 
      android:id="@+id/textView3" /> 

     <EditText 
     android:layout_width="106dp" 
     android:layout_height="wrap_content" 
     android:inputType="number" 
     android:ems="10" 
     android:id="@+id/recipeT" 
     android:layout_gravity="right" /> 

     <Button 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="Calculate" 
      android:id="@+id/calculateButton" 
      android:layout_gravity="center_horizontal" 
      android:nestedScrollingEnabled="false" 
      android:enabled="true" 
      android:onClick="calculate" /> 

     <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:textAppearance="?android:attr/textAppearanceLarge" 
      android:id="@+id/result" 
      android:layout_gravity="center_horizontal" /> 
    </LinearLayout> 

</RelativeLayout> 

Основная деятельность

package com.microwave; 

import android.support.v7.app.ActionBarActivity; 
import android.os.Bundle; 
import android.text.Editable; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.EditText; 
import android.widget.TextView; 


public class MainActivity extends ActionBarActivity { 
EditText microwaveP; 
EditText recipeP; 
EditText recipeT; 
TextView result; 

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


    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.menu_main, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 


    public void calculate(View view){ 


     int recipePower = Integer.parseInt(recipeP.getText().toString()); 
     int microwavePower = Integer.parseInt(microwaveP.getText().toString()); 
     int recipeTime = Integer.parseInt(recipeT.getText().toString()); 
     int difference = recipePower - microwavePower; 
     int differencePercent = recipePower/difference; 
     int microwaveTime = recipeTime * differencePercent; 
     result.setText(microwaveTime); 

    } 
} 

Answer 1

Добавьте этот код после того, как setContentView инициализировать свои взгляды:

microwaveP = (EditText)findViewById(R.id.microwaveP); 
recipeP = (EditText)findViewById(R.id.recipeP); 
recipeT = (EditText)findViewById(R.id.recipeT); 
result = (TextView)findViewById(R.id.result);