Double Data Type verursacht App zum Absturz

Question

Ich versuche Benutzereingaben abzurufen, speichern Sie es in den persistenten Daten. Dann möchte ich die Daten verwenden und einen Kreditbetrag berechnen. Ich weiß, dass es etwas mit meinen doppelten Datentypen zu tun hat, und ich habe gesucht und vergeblich versucht. Was mache ich falsch? Hier

ist der Code:

package com.example.s35505109; 

import android.os.Bundle; 
import android.preference.PreferenceManager; 
import android.app.Activity; 
import android.content.SharedPreferences; 
import android.text.TextUtils; 
import android.view.Menu; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.Spinner; 
import android.widget.TextView; 

public class MainActivity extends Activity { 
String strID; 
String strSurname; 
String strAddress; 
String strGuardName; 
String strGuardID; 
String strGender; 
String strOutcome; 
String douLoanAmt; 
String doumonInc; 

double dou_monInc = 0; 

double douRepayments = 0; 

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


// get inputed data from user 


//code the submit button 

    Button but1 = (Button)findViewById(R.id.buttSubmit); 
    final SharedPreferences sharedPref = 
PreferenceManager.getDefaultSharedPreferences(this); 
    but1.setOnClickListener(new OnClickListener(){ 

    public void onClick(View v){ 

    //This is where your code will go 
    // retrieve data from input 
     EditText ID = (EditText)findViewById(R.id.editTextID); 
     EditText surname = (EditText)findViewById(R.id.editTextSurname); 
     Spinner gender = (Spinner)findViewById(R.id.txtGender); 
     EditText loanAmt = (EditText)findViewById(R.id.editTextLoanAmt); 
     EditText address = (EditText)findViewById(R.id.editTextAddress); 
     EditText guardname = (EditText)findViewById(R.id.editTextGuarName); 
     EditText guardID = (EditText)findViewById(R.id.editTextGuarID); 
     EditText monInc = (EditText)findViewById(R.id.editTextMoInc);   
     TextView repayments = (TextView)findViewById(R.id.textViewRepayments); 
     TextView outcome = (TextView)findViewById(R.id.textView1); 

     strID = ID.getText().toString(); 
     strSurname = surname.getText().toString(); 
     strGender = gender.getSelectedItem().toString(); 
     douLoanAmt = loanAmt.getText().toString(); 
     if (!TextUtils.isEmpty(douLoanAmt)) { 
      // call parseDouble in here 
      double dou_LoanAmt = Double.parseDouble(douLoanAmt); 
     }   
     strAddress = address.getText().toString(); 
     strGuardName = guardname.getText().toString(); 
     strGuardID = guardID.getText().toString(); 
     doumonInc = monInc.getText().toString(); 
     if (!TextUtils.isEmpty(doumonInc)) { 
      // call parseDouble in here 
      double dou_monInc = Double.parseDouble(doumonInc); 
     }   


     if (dou_monInc < 5000){ 
      outcome.setText("You do not qualify for a loan"); 
     ;} 
     else if (dou_monInc>5000 && dou_monInc<10000){ 
      outcome.setText("You qualify for a maximum loan of R40,000 at 15% interest");} 
     else if (dou_monInc>10000 && dou_monInc<30000){ 
      outcome.setText("You qualify for a maximum loan of R70,000 at 16.5% interest");} 
     else if (dou_monInc>30000){ 
      outcome.setText("You qualify for a maximum loan of R70,000 at 16.5% interest");} 
     else {outcome.setText("");}  


     douRepayments = Float.parseFloat(repayments.getText().toString()); 
     SharedPreferences.Editor editor = sharedPref.edit(); 
     editor.putString("key1", strID); 
     editor.putString("key2", strSurname); 
     editor.putString("key3", strGender); 
     editor.putString("key4", strAddress); 
     editor.putString("key5", strGuardName); 
     editor.putString("key6", strGuardID); 
     editor.putString("key7", strOutcome); 
     //editor.putFloat("key8", douLoanAmt); 
     //editor.putFloat("key9", doumonInc); 
     //editor.putFloat("key10", douRepayments); 
     editor.commit(); 
     } 
    }); //end but1 

} 



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

}

Hier ist der Stack-Trace:

04-23 08:17:10.178: E/AndroidRuntime(2690): in writeCrashedAppName, pkgName 
:com.example.s35505109 
04-23 08:17:10.228: E/AndroidRuntime(2690): FATAL EXCEPTION: main 
04-23 08:17:10.228: E/AndroidRuntime(2690): Process: com.example.s35505109, 
PID: 2690 
04-23 08:17:10.228: E/AndroidRuntime(2690): java.lang.NumberFormatException: 
Invalid float: "Repayments:" 
04-23 08:17:10.228: E/AndroidRuntime(2690):  at 
java.lang.StringToReal.invalidReal(StringToReal.java:63) 
04-23 08:17:10.228: E/AndroidRuntime(2690):  at 
java.lang.StringToReal.initialParse(StringToReal.java:114) 
04-23 08:17:10.228: E/AndroidRuntime(2690):  at 
java.lang.StringToReal.parseFloat(StringToReal.java:304) 
04-23 08:17:10.228: E/AndroidRuntime(2690):  at 
java.lang.Float.parseFloat(Float.java:300) 
04-23 08:17:10.228: E/AndroidRuntime(2690):  at 
com.example.s35505109.MainActivity$1.onClick(MainActivity.java:91) 
04-23 08:17:10.228: E/AndroidRuntime(2690):  at 
android.view.View.performClick(View.java:4560) 
04-23 08:17:10.228: E/AndroidRuntime(2690):  at 
android.view.View$PerformClick.run(View.java:18636) 
04-23 08:17:10.228: E/AndroidRuntime(2690):  at 
android.os.Handler.handleCallback(Handler.java:733) 
04-23 08:17:10.228: E/AndroidRuntime(2690):  at 
android.os.Handler.dispatchMessage(Handler.java:95) 
04-23 08:17:10.228: E/AndroidRuntime(2690):  at 
android.os.Looper.loop(Looper.java:136) 
04-23 08:17:10.228: E/AndroidRuntime(2690):  at 
android.app.ActivityThread.main(ActivityThread.java:5021) 
04-23 08:17:10.228: E/AndroidRuntime(2690):  at 
java.lang.reflect.Method.invokeNative(Native Method) 
04-23 08:17:10.228: E/AndroidRuntime(2690):  at 
java.lang.reflect.Method.invoke(Method.java:515) 
04-23 08:17:10.228: E/AndroidRuntime(2690):  at 
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run 
(ZygoteInit.java:827) 
04-23 08:17:10.228: E/AndroidRuntime(2690):  at 
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:643) 
04-23 08:17:10.228: E/AndroidRuntime(2690):  at 
dalvik.system.NativeStart.main(Native Method) 

Answer 1

App wegen eingegebenen Wert stürzt nicht in doppelt analysiert werden.

04-23 08:17:10.228: E/AndroidRuntime(2690): java.lang.NumberFormatException: 
Invalid float: "Repayments:" 

Stapelüberwachung zeigt den Fehler, Sie haben Wort „Rückzahlungen“ eingegeben und natürlich kann es nicht in doppelt analysiert werden.

Sie sollten einen EditText mit dem Typ numberDecimal|numberSigned wie folgt verwenden, dann wird dem Benutzer eine Zehnertastatur angezeigt, und dann wird er weniger fehleranfällig.

<EditText 
     android:id="@+id/editText" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:ems="10" 
     android:inputType="numberDecimal|numberSigned" 
     android:text="Name" 
     tools:layout_editor_absoluteX="84dp" 
     tools:layout_editor_absoluteY="103dp" /> 

Dann müssen Sie die NumberFormatException wie folgt behandeln.

if (!TextUtils.isEmpty(douLoanAmt)) { 
      try { 
       // call parseDouble in here 
       double dou_LoanAmt = Double.parseDouble(douLoanAmt); 
       // it means it is double, process 
      } catch (Exception e1) { 
       // this means it is not double 
       // show error message 
       e1.printStackTrace(); 
      } 
     }