java - Android Splash Screen only opens if I install the app -

i teen programmer looking help.

i wrote simple splash screen thingy , works if uninstall , reinstall app.

please have , see if doing wrong.

thanks!

package ca._____.test;  import android.app.activity; import android.content.intent; import android.os.bundle; import android.util.log; import android.view.window; import android.view.windowmanager;  public class splash extends activity {   private static string tag = splash.class.getname();  private static long sleep_time = 5;    // sleep time   @override  protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);      this.requestwindowfeature(window.feature_no_title);    // removes title bar     this.getwindow().setflags(windowmanager.layoutparams.flag_fullscreen,     windowmanager.layoutparams.flag_fullscreen);    // removes notification bar    setcontentview(r.layout.spash_screen);    // start timer , launch main activity   intentlauncher launcher = new intentlauncher();   launcher.start();   }   private class intentlauncher extends thread {   @override   /**    * sleep time , start new activity.    */   public void run() {      try {         // sleeping         thread.sleep(sleep_time*1000);      } catch (exception e) {         log.e(tag, e.getmessage());      }       // start main activity      intent intent = new intent(splash.this, mainactivity.class);      splash.this.startactivity(intent);      splash.this.finish();   } } } 

try start intentlauncher thread in onresume(), time activity's onresume() called activity created , show screen.

second , best thing start mainactivity in onresume() in handler this

new handler().postdelayed(new runnable() {   public void run() {   intent intent = new intent(splash.this, mainactivity.class);   splash.this.startactivity(intent);   splash.this.finish();      } }, 5000); 

this best way.