android - default value when checkbox is not clicked -


i writing app selection of output depends on checkbox selected. have 4 checkboxes choosing different filters.

private  string  x=null;  public void oncheckboxclicked(view view) {      checkbox check1 = (checkbox) findviewbyid(r.id.checkbox_ok);     checkbox check2 = (checkbox) findviewbyid(r.id.checkbox_nok);     checkbox check3 = (checkbox) findviewbyid(r.id.checkbox_check);     checkbox check4 = (checkbox) findviewbyid(r.id.checkbox_allok);     if (check1.ischecked()) {         x = "0000";         log.d(tag, x);     } else if (check2.ischecked()) {         x = "1111";         log.d(tag, x);     } else if (check3.ischecked()) {         x = "8888";         log.d(tag, x);     } else if (check4.ischecked()) {         x = "";         log.d(tag, x);     } else{x=""; } }

how put default value if none of checkboxes clicked? tried initialising string x passes filter value app crashes when try display results without checkbox being checked.

option 1: initialize string default value

string x = "mydefaultvalue";

option 2: using else, if no checkbox ischecked, else

if (check1.ischecked()) {     x = "0000";     log.d(tag, x); } else if (check2.ischecked()) {     x = "1111";     log.d(tag, x); } else if (check3.ischecked()) {     x = "8888";     log.d(tag, x); } else if (check4.ischecked()) {     x = "";     log.d(tag, x); } else{     x = "default value";     log.d(tag, x); }

the error got nullpointerexeption because initialise string null. using 1 of 2 options fix problem.


Comments

Post a Comment

Popular posts from this blog

javascript - RequestAnimationFrame not working when exiting fullscreen switching space on Safari -

request animation frame stops working when exiting fullscreen clicking on original space's safari window. fine if fullscreen mode canceled escape key or calling cancelfullscreen(). steps reproduce: open https://dl.dropboxusercontent.com/u/769042/prezi/safari-fullscreen.html click "draw raf", kittie appears click "fullscreen", go fullscreen click "draw raf", kittie appears go space original safari was, showing "click exit fullscreen mode", click anywhere, out fullscreen click "draw raf", nothing happens what handling click calling: window.requestanimationframe(draw); which draws on canvas context: function draw() { ctx.drawimage(img, math.random()*500|0, math.random()*400|0, 100, 100); } i checked .hidden , .visibilitystate, updated correctly. tested on osx 10.9.3, safari 7.0.4 (9537.76.4). has workaround/solution other switching old settimeout? this sounds webkit bug 88940 : using reque
Read more

Python ctypes access violation with const pointer arguments -

i have api i'm trying wrap in python (2.7.6 on win7) code using ctypes. here's api: client_dllfunc bool clientapi search_exporttoclipcopy(clienthsearch handle, int channel, lpctstr filename, const time_t& from, const time_t& to, const bool* cameras, int length, bool usepassword, lpctstr password, bool includetextin = false, bool excludeplayer = false); the issue i'm having cameras argument; , i've had issue other const pointer arguments well. here's how i'm wrapping api: def search_exporttoclipcopy(self, hsearch, csearch, filename, tfrom, tto, cameras, length, usepassword, password, includetextin=true, excludeplayer=false): exporttoclipcopy = self.sdkdll.search_exporttoclipcopy exporttoclipcopy.argtypes = [c_int, c_int, c_wchar_p, c_long, c_long, pointer(c_bool), c_int, c_bool, c_wchar_p, c_bool, c_bool] exporttoclipcopy.restype = c_bool exporttoclipcopy(hsearch, csearch, filename, tfrom, tto, cameras, length, usepassword, pass
Read more