Java 如何在android中解决StringIndexOutOfBoundsException
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how to resolve StringIndexOutOfBoundsException in android
提问by Farhan Shah
This is my logcat report:
这是我的 logcat 报告：
java.lang.StringIndexOutOfBoundsException: length=0; regionStart=0; regionLength=2
at java.lang.String.startEndAndLength(String.java:583)
at java.lang.String.substring(String.java:1464)
at com.buzzador.profile.getValidPhoneNumber(profile.java:1966)
at com.buzzador.profile.setDataForServer(profile.java:1717)
at com.buzzador.profile.onClick(profile.java:236)
at android.view.View.performClick(View.java:4377)
at android.view.View$PerformClick.run(View.java:18044)
at android.os.Handler.handleCallback(Handler.java:725)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5306)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
at dalvik.system.NativeStart.main(Native Method)
and i think the issue is in this function:
我认为问题出在这个函数中：
public String getValidPhoneNumber (String phoneNumber, String country)
{
String csValidPhoneNumber = "";
phoneNumber = getPhoneNumberWithoutReqularExpresions(phoneNumber);
phoneNumber = phoneNumber.replaceFirst ("^0*", "");
String csCountryCode = getCountryCode(country);
String csAppendedCode = phoneNumber.substring(0, csCountryCode.length());
if(csAppendedCode.equals(csCountryCode))
{
csValidPhoneNumber = "+" + phoneNumber;
return csValidPhoneNumber;
}
csValidPhoneNumber = "+" + csCountryCode + phoneNumber;
return csValidPhoneNumber;
}
采纳答案by Kevin Robatel
Are you sure that phoneNumberis not equal to ""?
You have to check that phoneNumberhave more chars than the csCountryCode.length().
你确定这phoneNumber不等于""？您必须检查是否phoneNumber有比csCountryCode.length().
String csAppendedCode = phoneNumber.length() > csCountryCode.length() ? phoneNumber.substring(0, csCountryCode.length()) : "";
回答by Hamid Shatu
The last index of a Stringis string.length()-1but you are trying to access index with string.length()which doesn't exist, that's why you are getting this exception...
a 的最后一个索引String是，string.length()-1但您正在尝试访问string.length()不存在的索引，这就是您收到此异常的原因...
java.lang.StringIndexOutOfBoundsException: length=0; regionStart=0; regionLength=2
Now, you should change this line...
现在，您应该更改此行...
String csAppendedCode = phoneNumber.substring(0, csCountryCode.length());
to this...
到这...
String csAppendedCode = phoneNumber.substring(0, csCountryCode.length()-1);
