android - What is making my widget's infinite loop stop working? -


my widget blank background switches between 2 colors 333ms delay between each switch. works fine @ first, after 158 switches, stops switching colors. thing is, don't rely on onupdate. everything's in infinite while-loop first called when put widget on home screen. causing stop switching after 158 switches? changing background color costly, , os disables widget?

colorswitchwidget.java:

public class colorswitchwidget extends appwidgetprovider {      static void updateappwidget(context context, appwidgetmanager appwidgetmanager, int appwidgetid) {          remoteviews views = new remoteviews(context.getpackagename(), r.layout.color_switch_widget);          boolean lighton = true;          while(true){             try{                 thread.sleep(333);             } catch(interruptedexception e){             }              if (lighton) {                 views.setint(r.id.relativelayout1, "setbackgroundcolor", color.argb(150, 255, 248, 231)); //color 1                 lighton = false;                 appwidgetmanager.updateappwidget(appwidgetid, views);             } else {                 views.setint(r.id.relativelayout1, "setbackgroundcolor", color.argb(220, 255, 248, 231)); //color 2                 lighton = true;                 appwidgetmanager.updateappwidget(appwidgetid, views);             }         }     }      @override     public void onupdate(context context, appwidgetmanager, appwidgetmanager, int[] appwidgetids) {         (int appwidgetid : appwidgetids) {             updateappwidget(context, appwidgetmanager, appwidgetid);         }     }      @override     public void onenabled(context context) {     }      @override     public void ondisabled(context context) {     } }

color_switch_widget_info.xml:

<?xml version="1.0" encoding="utf-8"?> <appwidget-provider  xmlns:android="http://schemas.android.com/apk/res/android"     android:initialkeyguardlayout="@layout/color_switch_widget"     android:initiallayout="@layout/color_switch_widget"     android:minheight="40dp"     android:minwidth="40dp"     android:previewimage="@drawable/widget_icon_blink"     android:resizemode="horizontal|vertical"     android:updateperiodmillis="1800000"     android:widgetcategory="home_screen"></appwidget-provider>

the widget works... not long. infinite loop poor choice?

edit: found workaround doesn't use thread.sleep(). i'm not sure if cause problems or memory issues, seems work now.

final handler myhandler = new handler(); final runnable blinkrunnable = new runnable(){     int lightoff = true;     public void run(){         if(lightoff){             lightoff = false;             views.setint(r.id.relativelayout1, "setbackgroundcolor", color.argb(220, 255, 248, 231)); //light "on"             appwidgetmanager.updateappwidget(appwidgetid, views);             myhandler.postdelayed(this, 333);         } else{             lightoff = true;             views.setint(r.id.relativelayout1, "setbackgroundcolor", color.argb(150, 255, 248, 231)); //light "off"             appwidgetmanager.updateappwidget(appwidgetid, views);             myhandler.postdelayed(this, 333);         }     } };  //start loop myhandler.post(blinkrunnable);

the problem here fact don't run on custom thread. method called main thread, , when pause main thread(thread.sleep()) android thinks application isn't responding.

use new thread instead creating new class , letting extend thread


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