Android Note--to determine if the program was first launched

1  Public classWelcomeextendsActivity {2     Private Final LongSplash_length = 2000;3Handler Handler =NewHandler ();4 5      Public voidonCreate (Bundle savedinstancestate) {6         Super. OnCreate (savedinstancestate);7 Setcontentview (r.layout.farst_img);8         9         //define a setting record app that is launched several times!!! TenSharedpreferences setting = Getsharedpreferences ("Com.example.hr_jie", 0); OneBoolean User_first = Setting.getboolean ("First",true); A         if(User_first) {//the first time jumps to the Welcome page -Setting.edit (). Putboolean ("First",false). commit (); - Tiaozhuanzhu (); the}Else{//If this is the second boot, jump directly to the main page . - Tiaozhuanfu (); -         } -     } +      -      Public voidTiaozhuanzhu () { +Handler.postdelayed (NewRunnable () {//use Handler's postdelayed to implement delay jumps A           at              Public voidrun () { -Intent Intent =NewIntent (Welcome. This, Welcome_four.class);  - startactivity (Intent);  - finish ();  -             }     -}, Splash_length);//2 seconds to go to application main interface mainactivity in } -      to      Public voidTiaozhuanfu () { +Handler.postdelayed (NewRunnable () {//use Handler's postdelayed to implement delay jumps -           the              Public voidrun () { *Intent Intent =NewIntent (Welcome. This, Mainactivity.class);  $ startactivity (Intent); Panax Notoginseng finish ();  -             }     the}, Splash_length);//Jump to App Welcome screen in 2 seconds + } A}

Android Note--to determine if the program was first launched