Erreur NombreFormat provoquant une application à Crash Android lors de la prise d'entrées de données à partir de EditText

Question

J'essaie d'obtenir une entrée de l'utilisateur, puis les analyser en double. J'ai même ajouté un moyen de vérifier si elles sont nulles et puis les mettre à 0, mais il se bloque toujours et me donne l'erreur.

Voici mon code:

package com.example.alexlevine.oceanapp; 

import android.app.Activity; 
import android.content.Context; 
import android.content.DialogInterface; 
import android.content.SharedPreferences; 
import android.os.Bundle; 
import android.support.design.widget.FloatingActionButton; 
import android.support.design.widget.Snackbar; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.Toolbar; 
import android.view.View; 
import android.widget.Button; 
import android.widget.EditText; 

import com.google.gson.Gson; 

import java.util.ArrayList; 
import java.util.Arrays; 
import java.util.Calendar; 
import java.util.Date; 
import java.util.List; 

public class CarbonCalcActivity extends AppCompatActivity { 

    //household energy 
    double electricity; 
    double naturalGas; 
    double fuelOil; 
    double propane; 

    EditText elecunit; 
    EditText elecbill; 
    EditText gasunit; 
    EditText gasbill; 
    EditText fuelunit; 
    EditText fuelbill; 
    EditText propunit; 
    EditText propbill; 
    //transportation 
    double vehicle1; 
    double vehicle2; 
    double vehicle3; 
    double publicTransport;//.42*number of miles 
    double airTravel; 

    EditText v1mpw; 
    EditText v1mpg; 
    EditText v2mpw; 
    EditText v2mpg; 
    EditText v3mpw; 
    EditText v3mpg; 
    EditText pub; 
    EditText air; 
    //food 
    double totalFood; 
    double meatFishEggs; 
    double cerealBakery; 
    double dairy; 
    double fruitVegetable; 
    double eatingOut; 
    double otherFoods; 

    EditText meat; 
    EditText cer; 
    EditText da; 
    EditText fv; 
    EditText out; 
    EditText otherf; 
    //services and goods 
    double totalSG; 
    double clothing; 
    double furnishHousehold; 
    double otherGoods; 
    double services; 

    double total; 

    EditText sg; 
    EditText cloth; 
    EditText furn; 
    EditText otherg; 
    EditText serv; 
    Button submit; 

    List<double[]> dataValues; 

    Context activity; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_carbon_calc); 
     Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
     setSupportActionBar(toolbar); 
     /* 
     SharedPreferences sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE); 
     SharedPreferences.Editor editor = sharedPref.edit(); 
     editor.putInt(getString(R.string.saved_high_score), newHighScore); 
     editor.commit();*/ 

     activity = CarbonCalcActivity.this; 

     dataValues= new ArrayList<double[]>(); 

     submit = (Button) findViewById(R.id.submitb); 

    } 

    public void onBtnClicked(View v){ 
     if(v.getId() == R.id.submitb){ 
      elecunit = (EditText) findViewById(R.id.kwh); 
      elecbill = (EditText) findViewById(R.id.elec); 
      if(elecunit != null && elecbill != null) { 
       electricity = (Integer.parseInt(elecbill.getText().toString())/Integer.parseInt(elecunit.getText().toString()))*1.37*12; 

      } 
      else 
       electricity = 0; 

      gasunit = (EditText) findViewById(R.id.cf); 
      gasbill = (EditText) findViewById(R.id.gas); 

      if(gasunit != null && gasbill != null) { 
       naturalGas = (Integer.parseInt(gasbill.getText().toString())/Integer.parseInt(gasunit.getText().toString()))*120.61*12; 

      } 
      else 
       naturalGas = 0; 

      fuelunit = (EditText) findViewById(R.id.fogal); 
      fuelbill = (EditText) findViewById(R.id.fo); 

      if(fuelunit != null && fuelbill != null) { 
       fuelOil = (Integer.parseInt(fuelbill.getText().toString())/Integer.parseInt(fuelunit.getText().toString()))*22.37*12; 

      } 
      else 
       fuelOil = 0; 

      propunit = (EditText) findViewById(R.id.progal); 
      propbill = (EditText) findViewById(R.id.pro); 

      if(propunit != null && propbill != null) { 
       propane = (Integer.parseInt(propbill.getText().toString())/Integer.parseInt(propunit.getText().toString()))*12.17*12; 

      } 
      else 
       propane = 0; 

      v1mpg = (EditText) findViewById(R.id.v1mpg); 
      v1mpw = (EditText) findViewById(R.id.v1mpw); 

      if(v1mpg != null && v1mpw != null) { 
       vehicle1 = ((Integer.parseInt(v1mpw.getText().toString())*52)/(Integer.parseInt(v1mpg.toString()))*19.4*(100/95)); 
      } 
      else { 
       vehicle1 = 0; 
      } 

      v2mpg = (EditText) findViewById(R.id.v2mpg); 
      v2mpw = (EditText) findViewById(R.id.v2mpw); 

      if(v2mpg != null && v2mpw != null) { 
       vehicle2 = ((Integer.parseInt(v2mpw.getText().toString())*52)/Integer.parseInt(v2mpg.toString()))*19.4*(100/95); 
      } 
      else { 
       vehicle2 = 0; 
      } 

      v3mpg = (EditText) findViewById(R.id.v3mpg); 
      v3mpw = (EditText) findViewById(R.id.v3mpw); 

      if(v3mpg != null && v3mpw != null) { 
       vehicle3 = ((Integer.parseInt(v3mpw.getText().toString())*52)/Integer.parseInt(v3mpg.toString()))*19.4*(100/95); 
      } 
      else { 
       vehicle3 = 0; 
      } 

      pub = (EditText) findViewById(R.id.pubmpy); 

      if(pub != null) { 
       publicTransport = (Integer.parseInt(pub.toString()))*.42; 

      } 
      else 
       publicTransport = 0; 

      air = (EditText) findViewById(R.id.airmpy); 

      if(air != null) { 
       airTravel = (Integer.parseInt(air.toString()))*223*1.2*1.9*.0022; 

      } 
      else 
       airTravel = 0; 

      meat = (EditText) findViewById(R.id.meat); 

      if(meat != null) { 
       meatFishEggs = (Integer.parseInt(meat.toString()))*1452*12*.0022; 

      } 
      else 
       meatFishEggs = 0; 

      cer = (EditText) findViewById(R.id.cereal); 

      if(cer != null) { 
       cerealBakery = (Integer.parseInt(cer.toString()))*741*12*.0022; 

      } 
      else 
       cerealBakery = 0; 

      da = (EditText) findViewById(R.id.dairy); 

      if(da != null) { 
       dairy = (Integer.parseInt(cer.toString()))*1911*12*.0022; 

      } 
      else 
       dairy = 0; 

      fv = (EditText) findViewById(R.id.fruit); 

      if(fv != null) { 
       fruitVegetable = (Integer.parseInt(fv.toString()))*1176*12*.0022; 

      } 
      else 
       fruitVegetable = 0; 

      out = (EditText) findViewById(R.id.out); 

      if(out != null) { 
       eatingOut = (Integer.parseInt(out.toString()))*368*12*.0022; 

      } 
      else 
       eatingOut = 0; 

      otherf = (EditText) findViewById(R.id.otherf); 

      if(otherf != null) { 
       otherFoods = (Integer.parseInt(otherf.toString()))*467*12*.0022; 

      } 
      else 
       otherFoods = 0; 

      totalFood = meatFishEggs+cerealBakery+dairy+fruitVegetable+eatingOut+otherFoods; 

      cloth = (EditText) findViewById(R.id.cloth); 

      if(cloth != null) { 
       clothing = (Integer.parseInt(cloth.toString()))*436*12*.0022; 

      } 
      else 
       clothing = 0; 

      furn = (EditText) findViewById(R.id.furnish); 

      if(furn != null) { 
       furnishHousehold = (Integer.parseInt(furn.toString()))*459*12*.0022; 

      } 
      else 
       furnishHousehold = 0; 

      otherg = (EditText) findViewById(R.id.otherg); 

      if(otherg != null) { 
       otherGoods = (Integer.parseInt(otherg.toString()))*338*12*.0022; 

      } 
      else 
       otherGoods = 0; 

      serv = (EditText) findViewById(R.id.serv); 

      if(serv != null) { 
       services = (Integer.parseInt(serv.toString()))*178*12*.0022; 

      } 
      else 
       services = 0; 

      totalSG = clothing + furnishHousehold + otherGoods + services; 

      Date currentTime = Calendar.getInstance().getTime(); 

      double[] currentData = new double[26]; 

      currentData[0] = currentTime.getMonth(); 
      currentData[1] = currentTime.getDate(); 
      currentData[2] = currentTime.getYear(); 
      currentData[3] = electricity; 
      currentData[4] = naturalGas; 
      currentData[5] = fuelOil; 
      currentData[6] = propane; 
      currentData[7] = electricity; 
      currentData[8] = vehicle1; 
      currentData[9] = vehicle2; 
      currentData[10] = vehicle3; 
      currentData[11] = publicTransport; 
      currentData[12] = airTravel; 
      currentData[13] = totalFood; 
      currentData[14] = meatFishEggs; 
      currentData[15] =cerealBakery; 
      currentData[16] = dairy; 
      currentData[17] = fruitVegetable; 
      currentData[18] = eatingOut; 
      currentData[19] = otherFoods; 
      currentData[20] = totalSG; 
      currentData[21] = clothing; 
      currentData[22] = furnishHousehold; 
      currentData[23] = otherGoods; 
      currentData[24] = services; 

      total = 0; 

      for(int i = 3; i < 25; i++) 
      { 
       total = total + currentData[i]; 
      } 

      currentData[25] = (total/2000); 

     } 
    } 

Voici mon journal:

08-31 18:51:25.778 17735-17735/com.example.alexlevine.oceanapp 
    E/AndroidRuntime: FATAL EXCEPTION: main 

Process: com.example.alexlevine.oceanapp, PID: 17735 

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:6219) 

at android.view.View$PerformClick.run(View.java:24482) 

at android.os.Handler.handleCallback(Handler.java:769) 

at android.os.Handler.dispatchMessage(Handler.java:98) 

at android.os.Looper.loop(Looper.java:164) 

at android.app.ActivityThread.main(ActivityThread.java:6540) 

at java.lang.reflect.Method.invoke(Native Method) 

at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) 

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767) 

Caused by: java.lang.reflect.InvocationTargetException 

at java.lang.reflect.Method.invoke(Native Method) 

at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener 
.onClick(AppCompatViewInflater.java:288) 

at android.view.View.performClick(View.java:6219)  

at android.view.View$PerformClick.run(View.java:24482)  
                        at android.os.Handler.handleCallback(Handler.java:769)  
                        at android.os.Handler.dispatchMessage(Handler.java:98)  
                        at android.os.Looper.loop(Looper.java:164)  
                        at android.app.ActivityThread.main(ActivityThread.java:6540)  
                        at java.lang.reflect.Method.invoke(Native Method)  
                        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)  
                        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)  
                        Caused by: java.lang.NumberFormatException: For input string: "" 
                        at java.lang.Integer.parseInt(Integer.java:620) 
                        at java.lang.Integer.parseInt(Integer.java:643) 
                        at com.example.alexlevine.oceanapp.CarbonCalcActivity.onBtnClicked(CarbonCalcActivity.java:115) 
                        at java.lang.reflect.Method.invoke(Native Method)  
                        at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)  
                        at android.view.View.performClick(View.java:6219)  
                        at android.view.View$PerformClick.run(View.java:24482)  
                        at android.os.Handler.handleCallback(Handler.java:769)  
                        at android.os.Handler.dispatchMessage(Handler.java:98)  
                        at android.os.Looper.loop(Looper.java:164)  
                        at android.app.ActivityThread.main(ActivityThread.java:6540)  
                        at java.lang.reflect.Method.invoke(Native Method)  
                        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)  
                        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)  

Je ne suis pas sûr de la cause exacte de cela, d'autant plus que je l'ai fait toute la vérification de null. Quelqu'un peut-il aider s'il vous plaît à résoudre l'erreur? Merci!
elecunit = (EditText) findViewById (R.id.kwh); elecbill = (EditText) findViewById (R.id.élec);

  String elecunitString = elecunit.getText().toString(); 
      String elecbillString = elecbill.getText().toString(); 

      if(elecunitString != "" && elecbillString != "") { 
       electricity = (Integer.parseInt(elecbill.getText().toString())/Integer.parseInt(elecunit.getText().toString()))*1.37*12; 

      } 
      else 
       electricity = 0; 

Answer 1

Ce que j'ai remarqué est celui que vous vérifiez NULL est la EditText elle-même et non la valeur du EditText .. vous faites comme ..

EditText editText = (EditText) findViewById(R.id.edittext); 
if(editText != null) { 
    value = Double.parseDouble(editText.getText().toString()); 
} else { 
    value = 0; 
} 

Ainsi, le bon façon de vérifier la valeur de edittext .. fais comme ça

EditText editText = (EditText) findViewById(R.id.edittext); 
String etString = editText.getText().toString(); 
if(etString.equals("")) { 
    value = Double.parseDouble(etString); 
} else { 
    value = 0; 
} 

et vérifiez également si la chaîne peut être converti parce que vous êtes peut-être en train de convertir une lettre et vous obtiendrez un NumberFormatException afin que vous puissiez faire de lya quelque chose comme ça

private double parseStringToDouble(String sVal) { 
    if(!sVal.equals("")) { 
      try { 
       return Double.parseDouble(sVal); 
      } catch(Exception e) { 
       //will handle the exception 
       return 0; 
      } 
    } 
    else return 0; 
} 

Et à obtenir la valeur de votre edittext

EditText et1 = (EditText) findViewById(R.id.et1); 
value1 = parseStringToDouble(et1.getText().toString()); 

EditText et2 = (EditText) findViewById(R.id.et2); 
value2 = parseStringToDouble(et2.getText().toString());