android - make calculation and toast it---error -

-

in app have 3 edittext user can place number.then.when user press button,i result of calculation editext.

this code,but app forces down..any please?

code:

 float result = (float) ((((new double(input11.gettext().tostring())                                                     + new double(input21.gettext().tostring()))/2)*0.3)+ (new double(input31.gettext().tostring())*0.7));                                      vprosvasis.settext(float.tostring(result));}

calculation:

 float genikosvathmos = (float) ((new double(vprosvasis.gettext().tostring())+new double(vprosvasis7.gettext().tostring())+ new double(vprosvasis2.gettext().tostring())+new double(vprosvasis3.gettext().tostring())                                                         +new double(vprosvasis4.gettext().tostring())+new double(vprosvasis5.gettext().tostring())+new double(vprosvasis6.gettext().tostring()))/7);                                    float moria=(float) (((new float ((genikosvathmos*8)+("vprosvasis * 1.3")+("vprosvasis2 * 0,7"))*100)));                                          toast.maketext(thetiki.this, "genikos vathmos"+moria , toast.length_short).show();

logcat:

02-23 13:57:50.255: warn/dalvikvm(20923): threadid=1: thread exiting uncaught exception (group=0x4001d7d0) 02-23 13:57:50.364: error/androidruntime(20923): fatal exception: main 02-23 13:57:50.364: error/androidruntime(20923): java.lang.numberformatexception:  02-23 13:57:50.364: error/androidruntime(20923):     @ org.apache.harmony.luni.util.floatingpointparser.parsefltimpl(native method) 02-23 13:57:50.364: error/androidruntime(20923):     @ org.apache.harmony.luni.util.floatingpointparser.parsefloat(floatingpointparser.java:321) 02-23 13:57:50.364: error/androidruntime(20923):     @ java.lang.float.parsefloat(float.java:291) 02-23 13:57:50.364: error/androidruntime(20923):     @ java.lang.float.<init>(float.java:111) 02-23 13:57:50.364: error/androidruntime(20923):     @ kostas.menu.moria.thetiki$8.onclick(thetiki.java:372) 02-23 13:57:50.364: error/androidruntime(20923):     @ android.view.view.performclick(view.java:2461) 02-23 13:57:50.364: error/androidruntime(20923):     @ android.view.view$performclick.run(view.java:8888) 02-23 13:57:50.364: error/androidruntime(20923):     @ android.os.handler.handlecallback(handler.java:587) 02-23 13:57:50.364: error/androidruntime(20923):     @ android.os.handler.dispatchmessage(handler.java:92) 02-23 13:57:50.364: error/androidruntime(20923):     @ android.os.looper.loop(looper.java:123) 02-23 13:57:50.364: error/androidruntime(20923):     @ android.app.activitythread.main(activitythread.java:4627) 02-23 13:57:50.364: error/androidruntime(20923):     @ java.lang.reflect.method.invokenative(native method) 02-23 13:57:50.364: error/androidruntime(20923):     @ java.lang.reflect.method.invoke(method.java:521) 02-23 13:57:50.364: error/androidruntime(20923):     @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:858) 02-23 13:57:50.364: error/androidruntime(20923):     @ com.android.internal.os.zygoteinit.main(zygoteinit.java:616) 02-23 13:57:50.364: error/androidruntime(20923):     @ dalvik.system.nativestart.main(native method) 02-23 13:57:50.399: warn/activitymanager(2944):   force finishing activity kostas.menu.moria/.thetiki

you're getting numberformatexception. because float contains strings , can't parsed, here: new float ((genikosvathmos*8)+("vprosvasis * 1.3")+("vprosvasis2 * 0,7"))*100))

simply rid of ""

edit:

furthermore, vprosvasis etc, edittexts or other kind of input must convert values in proper way to able calculations them. 1 possibility is:

float vprosvasisfloat = float.parsefloat(vprosvasis.gettext().tostring());

then can perform calculations using vprosvasisfloat instead of vprosvasis


Comments

Post a Comment

Popular posts from this blog

Javascript line number mapping -

-
magically formatted comments change reported line number of javascript errors in browsers; this: //@line n "f" n line number , f file name. unfortunately, //@line appears ungoogleable. know there documentation on feature, , browsers support it? (i found references here , here .) from can find available in mozilla based browsers. it using js_setoptions command can turn these options on or off depending on values passed. https://developer.mozilla.org/en/js_setoptions
Read more

c# - Is it possible to remove an existing registration from Autofac container builder? -

-
something along lines: builder.registertype<mytype>().as<itype>(); builder.registertype<mytype2>().as<itype>(); builder.deregistertype<mytype>().as<itype>() var container = builder.build(); var types = container.resolve<ienumerable<itype>>(); assert.istrue(types.count == 1); assert.istrue(types[0].gettype == typeof(mytype2)); scenario: go through bunch of assemblies , go register types want make sure have 1 implementation of given type. need before create container. track on own nice if autofac me bit. this cannot done directly using containerbuilder , unless start on new one. mind you, having first built container should able construct new container filtering away unwanted types , reusing registrations first container. this: ... var container = builder.build(); builder = new containerbuilder(); var components = container.componentregistry.registrations .where(cr => cr.activator.limittype != typ...
Read more

php - Mysql PK and FK char(36) vs int(10) -

-
i have read mysql can handle indexes , searches better if tables keys integers rather char(36) uuid's. is worth converting int(10)? note: use 1 server , have have plans use multiple databases concurrently therefore removing 1 of big reasons using uuid. our tables innodb if makes difference. thanks in advance. usually rdbms can handle integer keys pk more efficient, other datatypes. reason how build index column, yes: long dont require string (or other typed) keys, should use integers. however: char(36) , int(10) far away being equal, because int(10) much smaller, char(36). dont know, if require many different keys, should keep in mind. update, complete last paragraph: int(10) 32-bit, char(36) 36 - ^byte^ (= 288-bit). not mean, int consumes less space, means, char(36) has 4 times more different keys.
Read more