android - StrictMode.ThreadPolicy.Builder Purpose and Advantages? -

i referred strictmode.threadpolicy.builder android document strictmode.threadpolicy.builder.

i have no clear idea strictmode.threadpolicy.builder.
when have use class strictmode.threadpolicy.builder.
what advantage , purpose of strictmode.threadpolicy.builder.
i want detailed explanation for

strictmode.threadpolicy policy = new strictmode.threadpolicy.builder()  .detectall()  .penaltylog()  .build(); strictmode.setthreadpolicy(policy); 

the advantages of defining stictmode policies within application force you, in development phase, make application more behaved within device running on: avoid running consuming operation on ui thread, avoids activity leakages, , one. when define these in code, make application crashes if defined strict polices has been compromised, makes fixes issues you've done (the not behaved approaches, network operations on ui thread).

i following first when start new project:

public class myapplication extends application {  private static final string tag = "myapplication";  @override public void oncreate() {     if (buildconfig.debug) {         log.w(tag, "======================================================");         log.w(tag, "======= application in strict mode - debugging =======");         log.w(tag, "======================================================");          /**          * doesn't enable on main thread related          * resource access.          */         strictmode.setthreadpolicy(new strictmode.threadpolicy.builder()                 .detectall()                 .penaltylog()                 .penaltyflashscreen()                 .penaltydeath()                 .build());          /**          * doesn't enable leakage of application's components.          */         final strictmode.vmpolicy.builder builder = new strictmode.vmpolicy.builder();          if (build.version.sdk_int >= build.version_codes.jelly_bean) {             builder.detectleakedregistrationobjects();         }         if (build.version.sdk_int >= build.version_codes.jelly_bean_mr2) {             builder.detectfileuriexposure();         }         builder.detectleakedclosableobjects()                .detectleakedsqlliteobjects()                .penaltylog()                .penaltydeath();         strictmode.setvmpolicy(builder.build());     }     super.oncreate(); } 

}

and setting androidmanifest.xml under application tag following:

android:debugable="true" 

the following i've shown forces strictmode polices on application when it's in debug mode (the flag in manifest must removed before published it).

hope helps.