java - Calculate currency exchange using checkboxes -


i've started learning java in android studio , i'm doing simple currency exchange app. has checkboxes indicating different countries different currency values. have problem saying crashed when run emulator. (it crashes when implemented calculation inside case us). works fine displaying strings though.

java file:

public class mainactivity extends appcompatactivity { arraylist<string> selection = new arraylist<string>(); textview final_result; edittext medit;  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);     final_result = (textview)findviewbyid(r.id.result_text);     final_result.setenabled(false); }  public void selectcountry (view view) {     boolean checked = ((checkbox) view).ischecked();      switch (view.getid())     {         case r.id.us:             if(checked) {                 medit = (edittext)findviewbyid(r.id.edit_myr);                 double output = double.valueof(medit.gettext().tostring());                 double s;                 s=output*4.25;                 string output2=string.valueof(s);                 selection.add(output2);             }             else             {                 selection.remove("united states");             }             break;         case r.id.au:             if(checked) {                 selection.add("australia");             }             else             {                 selection.remove("australia");             }             break;         case r.id.uk:             if(checked) {                 selection.add("united kingdom");             }             else             {                 selection.remove("united kingdom");             }             break;         case r.id.jap:             if(checked) {                 selection.add("japan");             }             else             {                 selection.remove("japan");             }             break;         case r.id.ch:             if(checked) {                 selection.add("china");             }             else             {                 selection.remove("china");             }             break;         case r.id.sg:             if(checked) {                 selection.add("singapore");             }             else             {                 selection.remove("singapore");             }             break;         case r.id.in:             if(checked) {                 selection.add("india");             }             else             {                 selection.remove("india");             }             break;         case r.id.th:             if(checked) {                 selection.add("thailand");             }             else             {                 selection.remove("thailand");             }             break;     } } public void finalselection (view view) {     string final_selection = "";      for(string selections : selection)     {         final_selection = final_selection + selections + "\n";     }     final_result.settext(final_selection);     final_result.setenabled(true); }

xml:

    <edittext     android:id="@+id/edit_myr"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:layout_torightof="@+id/myr"     android:layout_marginright="40dp"     android:backgroundtint="@android:color/holo_red_light"/> </relativelayout>      <textview     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="@string/third"     android:textsize="20sp"     android:layout_margintop="15dp"     android:layout_marginbottom="8dp"     android:layout_marginleft="20dp"     android:textcolor="#000000"/> <button     android:id="@+id/button1"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="convert"     android:layout_gravity="center_horizontal"     android:onclick="finalselection"/>  <textview     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:id="@+id/result_text"     android:layout_gravity="center_horizontal"/>

my checkbox in xml is:

        <checkbox         android:id="@+id/us"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_weight="20"         android:onclick="selectcountry"           android:drawableleft="@drawable/united_states"/>


-

Comments

Post a Comment

Popular posts from this blog

c# - Binding a comma separated list to a List<int> in asp.net web api -

the default binder in web api expecst http://url.com/webapi/report/?pageids=3243&pageids=2365 to bind public ihttpactionresult report(list<int> pageids){ // exciting webapi code} i wish bind http://url.com/webapi/report/?pageids=3243,2365 as running out of space in url get . i have created class public class commaseparatedmodelbinder : system.web.http.modelbinding.imodelbinder { public bool bindmodel(httpactioncontext actioncontext, modelbindingcontext bindingcontext) { //binding in here } } and registered in webapiconfig.cs var provider = new simplemodelbinderprovider( typeof(list<int>), new commaseparatedmodelbinder()); config.services.insert(typeof(modelbinderprovider), 0, provider); i have altered method signature use model binder so public ihttpactionresult report( [modelbinder] list<int> pageids){ // exciting webapi code} however break point in binder not being
Read more

Delphi 7 and decode UTF-8 base64 -

in delphi 7, have widestring encoded base64(that received web service widestring result) : pd94bwwgdmvyc2lvbj0ims4wij8+dqo8c3ryaw5nptiq2lpyqjwvc3ryaw5npg== when decoded it, result not utf-8: <?xml version="1.0"?> <string>طھط³طھ</string> but when decoded base64decode.org, result true : <?xml version="1.0"?> <string>تست</string> i have use encddecd unit decodestring function. the problem have using decodestring . function, in delphi 7, treats decoded binary data being ansi encoded. , problem text utf-8 encoded. to continue encddecd unit have couple of options. can switch decodestream . instance, code produce utf-8 encoded text file data: {$apptype console} uses classes, encddecd; const data = 'pd94bwwgdmvyc2lvbj0ims4wij8+dqo8c3ryaw5nptiq2lpyqjwvc3ryaw5npg=='; var input: tstringstream; output: tfilestream; begin input := tstringstream.create(data); try output := tfilestream.
Read more

html - Is there any way to exclude a single element from the style? (Bootstrap) -

so, have img logo, overlaid on div styled background-image: url("...") , , both elements inside 2 div classes .to-color , .to-overlay respectively, black transparent overlay. is there way exclude logo style given these 2 classes? here's jsfiddle example: link html , css example: - html - <div class="to-color"> <div class="to-overlay"> <div class="respo"> <div class="row"> <div class="col-xs-4 col-xs-offset-4 text-center"> <img src="http://ansonalex.com/wp-content/uploads/2011/06/google-logo-768x260.png" alt="..." class="img-responsive"> </div> </div> </div> </div> </div> - css - .to-color { background-color: #000; } .to-overlay { opacity : 0.5; } .respo { background-image: url("https://source.unsplash.com/category/objects/1600x900"); background-position: center center;
Read more