获取java.lang.IllegalStateException：添加BigDecimal变量后无法执行该活动的方法。

全部- 我的项目（计算提示）工作正常，直到我添加了一些BigDecimal变量来帮助舍入。现在，当我点击 “计算” 应用程序强制关闭和logcat的说：获取java.lang.IllegalStateException：添加BigDecimal变量后无法执行该活动的方法。

06-01 14:24:21.246: W/dalvikvm(15364): threadid=1: thread exiting with uncaught exception (group=0x40a4a1f8) 
06-01 14:24:21.256: E/AndroidRuntime(15364): FATAL EXCEPTION: main 
06-01 14:24:21.256: E/AndroidRuntime(15364): java.lang.IllegalStateException: Could not execute method of the activity 
06-01 14:24:21.256: E/AndroidRuntime(15364): at android.view.View$1.onClick(View.java:3044) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at android.view.View.performClick(View.java:3511) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at android.view.View.onKeyUp(View.java:6078) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at android.widget.TextView.onKeyUp(TextView.java:5636) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at android.view.KeyEvent.dispatch(KeyEvent.java:2623) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at android.view.View.dispatchKeyEvent(View.java:5500) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1246) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1246) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1246) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1246) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchKeyEvent(PhoneWindow.java:1879) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at com.android.internal.policy.impl.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1361) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at android.app.Activity.dispatchKeyEvent(Activity.java:2324) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1806) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at android.view.ViewRootImpl.deliverKeyEventPostIme(ViewRootImpl.java:3327) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at android.view.ViewRootImpl.handleFinishedEvent(ViewRootImpl.java:3300) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2460) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at android.os.Handler.dispatchMessage(Handler.java:99) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at android.os.Looper.loop(Looper.java:137) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at android.app.ActivityThread.main(ActivityThread.java:4424) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at java.lang.reflect.Method.invokeNative(Native Method) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at java.lang.reflect.Method.invoke(Method.java:511) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at dalvik.system.NativeStart.main(Native Method) 
06-01 14:24:21.256: E/AndroidRuntime(15364): Caused by: java.lang.reflect.InvocationTargetException 
06-01 14:24:21.256: E/AndroidRuntime(15364): at java.lang.reflect.Method.invokeNative(Native Method) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at java.lang.reflect.Method.invoke(Method.java:511) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at android.view.View$1.onClick(View.java:3039) 
06-01 14:24:21.256: E/AndroidRuntime(15364): ... 24 more 
06-01 14:24:21.256: E/AndroidRuntime(15364): Caused by: java.lang.NumberFormatException: Invalid float: "" 
06-01 14:24:21.256: E/AndroidRuntime(15364): at java.lang.StringToReal.invalidReal(StringToReal.java:63) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at java.lang.StringToReal.parseFloat(StringToReal.java:289) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at java.lang.Float.parseFloat(Float.java:300) 
06-01 14:24:21.256: E/AndroidRuntime(15364): at com.tip.ping.TippingActivity.calculateNumbers(TippingActivity.java:47) 
06-01 14:24:21.256: E/AndroidRuntime(15364): ... 27 more

我的代码是：

public class TippingActivity extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
    } 
    public void calculateNumbers(View view) { 
     EditText text = (EditText)findViewById(R.id.edit_bill);    
     String value; 
     value = text.getText().toString();  
     float bill = Float.parseFloat(value); 
     BigDecimal billbd; 
     billbd = new BigDecimal(bill); 


     EditText text2 = (EditText)findViewById(R.id.edit_tip); 
     String value2; 
     value2 = text2.getText().toString();  
     if(!value2.contains(".")) 
      value2 = "."+value2; 
     float tip = Float.parseFloat(value2); 
     BigDecimal tipbd; 
     tipbd = new BigDecimal(tip); 


     EditText text3 = (EditText)findViewById(R.id.edit_people); 
     String value3; 
     value3 = text3.getText().toString(); 

     TextView answer = (TextView) findViewById(R.id.answer); 
     String answers; 
     answers = answer.getText().toString(); 
     float answerf = Float.parseFloat(answers); 
     BigDecimal answerbd; 
     answerbd = new BigDecimal(answerf); 
     answerbd.setScale(2); 
     TextView quick_answer = (TextView) findViewById(R.id.quick_answer); 
     String qanswers; 
     qanswers = quick_answer.getText().toString(); 
     float qanswerf = Float.parseFloat(qanswers); 
     BigDecimal qanswerbd; 
     qanswerbd = new BigDecimal(qanswerf);  

     float l3 = Float.parseFloat(value3); 
     BigDecimal l3bd; 
     l3bd = new BigDecimal(l3); 

     qanswerbd = billbd.multiply(tipbd).add(billbd); 
     qanswerbd.setScale(2, RoundingMode.HALF_UP); 
     String resultbd; 
     resultbd = qanswerbd.toString(); 

     quick_answer.setText(resultbd);  
    } 
}

提前感谢！

来源

2012-06-01 ninge

看起来像一个空的浮点值，但很难不带行号说（47号线是...？）

造成的：java.lang.NumberFormatException：无效的浮动： “”

EditText text = (EditText)findViewById(R.id.edit_bill); 
String value = text.getText().toString();

如果您在此处登录/打印value是否有任何事情回来？

来源

2012-06-01 20:40:01 Phix

对不起，我是android新手。 “日志/打印值”是什么？感谢您对线路号码的回答和抱歉。 – ninge

Log.d（“Appname”，“Value：”+ value）;并观察Logcat以查看运行时打印的值。这在正常的java中就像System.out.println（）。（如果你真的想要，你也可以使用System.out）。检查值并确保它不是一个空字符串，这会在Float.parseFloat（value）中引发数字格式异常。 – Brayden

谢谢。我检查了数字，所以它必须是另一个输入字段。 – ninge

它看起来像你试图从一个空字符串解析浮点数。在使用它们之前，你会希望对你的输入进行一些理智的检查，或者至少包括像Float.parseFloat这样的函数，这些函数可能会因为Try-Catch而失败（在这种情况下为NumberFormatException），为用户提供某种有用的反馈（可能是烤面包）。

来源

2012-06-01 20:47:50 Baobabs

谢谢，我会再次检查输入。 – ninge

您确定您已经在AndroidManifest.xml中声明了TippingActivity？

来源

2012-10-05 20:39:15

获取java.lang.IllegalStateException：添加BigDecimal变量后无法执行该活动的方法。

回答

相关问题