java - Android: whenever a edittext field is left empty, program closes giving exception -

-

program sudenly close when edittext left empty when ever pressed button move next activity. here code.

package cme.ws.com.ws.cme;  import android.app.activity; import android.content.context; import android.content.intent; import android.os.bundle; import android.support.v7.app.actionbaractivity; import android.view.view; import android.widget.button; import android.widget.edittext; import android.widget.toast;  /** * created waqas aamer on 5/27/2015. */ public class areaactivity extends activity {  int plotarea, coveredarea; int brickprice, blockprice, cementprice, sandprice, crushprice, ironprice; int brickprice1, blockprice1, cementprice1, sandprice1, crushprice1, ironprice1; int plotarea1, coveredarea1;  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_area);      {         final context context = getapplicationcontext();         final int duration = toast.length_short;          button movenextarea=(button) findviewbyid(r.id.buttonnextexteriorwall);         movenextarea.setonclicklistener(new view.onclicklistener() {             public void onclick(view v) {                  intent intent = getintent();                 if (null != intent)                 {                     // test = intent.getstringextra("nameofvariable");                     brickprice1 = intent.getintextra("anything00", brickprice);                     blockprice1 = intent.getintextra("anything11", blockprice);                     sandprice1 = intent.getintextra("anything22", sandprice);                     ironprice1 = intent.getintextra("anything33", ironprice);                     cementprice1 = intent.getintextra("anything44", cementprice);                     crushprice1 = intent.getintextra("anything55", crushprice);                 }                 edittext areanumber1 = (edittext) findviewbyid(r.id.edittextplotarea);                 if(areanumber1 == null)                 {                     toast toast = toast.maketext(context, "please fill plot area field ", duration);                     toast.show();                 }                 else                 {                     plotarea1 = integer.parseint(areanumber1.gettext().tostring());                 }                  edittext areanumber2 = (edittext) findviewbyid(r.id.edittextcoveredarea);                 if(areanumber2 == null)                 {                     toast toast1 = toast.maketext(context, "please fill covered area field ", duration);                     toast1.show();                 }                 else                 {                     coveredarea1 = integer.parseint(areanumber2.gettext().tostring());                 }                   int sqrt = (int) math.sqrt(plotarea1);                 int oneside = sqrt;                  intent secondactivity = new intent (getapplicationcontext(), exteriorwallactivity.class);                 secondactivity.putextra("anything000", brickprice1);                 secondactivity.putextra("anything111", blockprice1);                 secondactivity.putextra("anything222", cementprice1);                 secondactivity.putextra("anything333", sandprice1);                 secondactivity.putextra("anything444", ironprice1);                 secondactivity.putextra("anything555", crushprice1);                 secondactivity.putextra("anything", oneside);                 secondactivity.putextra("anything1", coveredarea1);                 startactivity(secondactivity);             }          });         } }

}

i want whenver edittext box left empty .the variable in whcih storing value automatically stores 0. eroor log is

07-05 23:20:42.206  14348-14348/cme.ws.com.ws.cme e/androidruntime﹕ fatal exception: main     java.lang.numberformatexception: unable parse '' integer             @ java.lang.integer.parseint(integer.java:412)             @ java.lang.integer.parseint(integer.java:382)             @ cme.ws.com.ws.cme.areaactivity$1.onclick(areaactivity.java:52)             @ android.view.view.performclick(view.java:2408)             @ android.view.view$performclick.run(view.java:8816)             @ android.os.handler.handlecallback(handler.java:587)             @ android.os.handler.dispatchmessage(handler.java:92)             @ android.os.looper.loop(looper.java:123)             @ android.app.activitythread.main(activitythread.java:4627)             @ java.lang.reflect.method.invokenative(native method)             @ java.lang.reflect.method.invoke(method.java:521)             @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:868)             @ com.android.internal.os.zygoteinit.main(zygoteinit.java:626)             @ dalvik.system.nativestart.main(native method)

your edittext fields cannot equals null because in previous line of verification have initialized them. instead of using if (areanumber1 == null) , if (areanumber2 == null), check edittext this:

boolean isempty(edittext textfield) {     return textfield.gettext().tostring().trim().length() == 0; }

if function return false means edittext not empty , return true means edittext empty.


Comments

Post a Comment

Popular posts from this blog

php - Zend Framework / Skeleton-Application / Composer install issue -

-
i trying create zend framework application using skeleton in netbeans. when run composer install, following error message: "c:\php\php.exe" "c:\composer\composer.phar" "--ansi" "--no-interaction" "update" "--dev" using deprecated option "dev". dev packages installed default now. loading composer repositories package information updating dependencies (including require-dev) requirements not resolved installable set of packages. problem 1 - package requires php >=5.5 php version (5.4.42) not satisfy requirement. problem 2 - installation request zendframework/zendframework 2.5.1 -> satisfiable zendframework/zendframework[2.5.1]. - zendframework/zendframework 2.5.1 requires php >=5.5 -> php version (5.4.42) not satisfy requirement. done. apparently, zend framework only needs php 5.3+ contradicts above. need use php 5.4. my composer.json following: { "name": "
Read more

c# - Better 64-bit byte array hash -

-
i need hash algorithm produces 64-bit hash code ( long ) fewer collisions string.gethashcode() , fast (no expensive calls cryptographic functions). here's implementation of fnv still shows 3% of collisions after testing 2 million random strings. need number way lower. void main() { const string chars = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz!#@$%^&*()_+}{\":?><,./;'[]0123456789\\"; const int n = 2000000; var random = new random(); var hashes = new hashset<long>(); int collisions = 0; for(int = 0; < n; i++) { var len = random.next(chars.length); var str = new char[len]; (int j = 0; j < len; j++) { str[j] = chars[random.next(chars.length)]; } var s = new string(str); if(!hashes.add(get64bithash( s ))) collisions++; } console.writeline("collision percentage after " + n + " random strings: " + ((doubl
Read more

python - PyCharm Type error Message -

-
i'm newbie trying out ml/dbn in python (3.4) under pycharm (comm.ed 4.5). following definition def make_thetas(xmin,xmax,n): xs = np.linespace(xmin,xmax,n) widths = (xs[1:] - xs[:-1])/2.0 thetas = xs[:-1] + widths return thetas throws error "class 'tuple' not define ' sub ', '-' operator cannot used on instance" on - operator on third line (widths = ....) ideas on how code running under pycharm - works alright in interactive python window. thx. to all, after g'g lot have found workaround seems work within pycharm. workaround because (even python newbie) expected python not need explicit typecasting, not when using datatypes imported lib such numpy. def make_thetas(xmin,xmax,n): xs = np.array(np.linspace(xmin,xmax,n)) widths = (xs[1:] - xs[:-1])/2.0 thetas = xs[:-1]+ widths return thetas using docstrings type-hinting such below did not work def make_thetas(xmin,xmax,n): "&q
Read more