應用程序在Android中意外停止？

-7

我的Android應用程序仍然給我這個下面的錯誤。當我點擊模擬器中的應用程序圖標時，不幸的是我的應用程序已停止工作。以下應用程序在Android中意外停止？

是logcat的錯誤

01-04 11:20:57.440: E/AndroidRuntime(798): FATAL EXCEPTION: main 
01-04 11:20:57.440: E/AndroidRuntime(798): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.oj2.currrencyconverter/com.oj2.currrencyconverter.MainConverter}: java.lang.NumberFormatException: Invalid int: "" 
01-04 11:20:57.440: E/AndroidRuntime(798): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 
01-04 11:20:57.440: E/AndroidRuntime(798): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
01-04 11:20:57.440: E/AndroidRuntime(798): at android.app.ActivityThread.access$600(ActivityThread.java:141) 
01-04 11:20:57.440: E/AndroidRuntime(798): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
01-04 11:20:57.440: E/AndroidRuntime(798): at android.os.Handler.dispatchMessage(Handler.java:99) 
01-04 11:20:57.440: E/AndroidRuntime(798): at android.os.Looper.loop(Looper.java:137) 
01-04 11:20:57.440: E/AndroidRuntime(798): at android.app.ActivityThread.main(ActivityThread.java:5039) 
01-04 11:20:57.440: E/AndroidRuntime(798): at java.lang.reflect.Method.invokeNative(Native Method) 
01-04 11:20:57.440: E/AndroidRuntime(798): at java.lang.reflect.Method.invoke(Method.java:511) 
01-04 11:20:57.440: E/AndroidRuntime(798): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
01-04 11:20:57.440: E/AndroidRuntime(798): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
01-04 11:20:57.440: E/AndroidRuntime(798): at dalvik.system.NativeStart.main(Native Method) 
01-04 11:20:57.440: E/AndroidRuntime(798): Caused by: java.lang.NumberFormatException: Invalid int: "" 
01-04 11:20:57.440: E/AndroidRuntime(798): at java.lang.Integer.invalidInt(Integer.java:138) 
01-04 11:20:57.440: E/AndroidRuntime(798): at java.lang.Integer.parseInt(Integer.java:359) 
01-04 11:20:57.440: E/AndroidRuntime(798): at java.lang.Integer.parseInt(Integer.java:332) 
01-04 11:20:57.440: E/AndroidRuntime(798): at com.oj2.currrencyconverter.MainConverter.onCreate(MainConverter.java:28) 
01-04 11:20:57.440: E/AndroidRuntime(798): at android.app.Activity.performCreate(Activity.java:5104) 
01-04 11:20:57.440: E/AndroidRuntime(798): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 
01-04 11:20:57.440: E/AndroidRuntime(798): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 
01-04 11:20:57.440: E/AndroidRuntime(798): ... 11 more

以下是代碼

package com.oj2.currrencyconverter; 

import android.os.Bundle; 
import android.app.Activity; 
import android.view.Menu; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.RadioButton; 

public class MainConverter extends Activity { 
    EditText dollars; 
    EditText rupees; 
    RadioButton dTOr; 
    RadioButton rTOd; 
    Button convert; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     //set Gui gui_main_converter for class MainConverter 
     setContentView(R.layout.gui_main_converter); 
     //Get the value from edittext in dollars 
     dollars = (EditText)findViewById(R.id.dollaredtxt); 
     // 
     String rup = dollars.getText().toString(); 
     int convertrup = Integer.parseInt(rup); 
     rupees = (EditText)findViewById(R.id.edtrup); 
     dTOr = (RadioButton) findViewById(R.id.radioDtoR); 
     dTOr.setChecked(true); 
     rTOd = (RadioButton) findViewById(R.id.radioRtoD); 
     convert = (Button) findViewById(R.id.btnConvert); 
     convert.setOnClickListener(mylistner); 
    } 
    private OnClickListener mylistner = new OnClickListener() { 

     @Override 
     public void onClick(View v) { 
      // TODO Auto-generated method stub 
      if (dTOr.isChecked()) { 
       ConvertDollarToRup(); 
      } 
      if (rTOd.isChecked()) { 
       ConvertRupToDollar(); 
      } 
     } 
    }; 
    public void ConvertDollarToRup() { 
     // TODO Auto-generated method stub 
     double val = Double.parseDouble(dollars.getText().toString()); 
     rupees.setText(Double.toString(val*56)); 
    } 
    public void ConvertRupToDollar() { 
     // TODO Auto-generated method stub 
     double val = Double.parseDouble(rupees.getText().toString()); 
     dollars.setText(Double.toString(val/56)); 

    } 

}

感謝你

來源

2013-01-04 Nilesh Wani

發佈您的代碼和logcat的...... – Subburaj

LO（N）g催化劑？ http://blog.seanbonner.com/wp-content/uploads/2009/07/1246818021845.jpg – doge

請參閱logcat的是有錯誤的'NumberFormatException'這意味着你的'ConvertDollarToRup（）'是有problem.So請檢查。 – Akshay

改變你的方法，這樣，

public void ConvertDollarToRup() { 
    if(!dollars.getText().toString().equals("")) 
    { 
    double val = Double.parseDouble(dollars.getText().toString()); 
    rupees.setText(Double.toString(val*56)); 
    } 
} 

    public void ConvertRupToDollar() { 
    if(!rupees.getText().toString().equals("")) 
    { 
    double val = Double.parseDouble(rupees.getText().toString()); 
    dollars.setText(Double.toString(val/56)); 
    } 
}

來源

2013-01-04 12:15:08

您正試圖轉換不具有內容的字符串：

dollars = (EditText)findViewById(R.id.dollaredtxt); 
String rup = dollars.getText().toString(); 
int convertrup = Integer.parseInt(rup);

RUP僅僅是這樣的：「」
如果您的EditText不包含值initally字符串將永遠是空的，你必須做在onclick方法解析和不在onCreate方法

來源

2013-03-07 16:40:04 Nickolaus

應用程序在Android中意外停止？

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