Android 中按home键和跳转到主界面的实例代码

//home

intent intent= new intent(intent.action_main); 
intent.setflags(intent.flag_activity_new_task); //如果是服务里调用，必须加入new task标识 
intent.addcategory(intent.category_home); 
startactivity(intent); 

//主界面

intent intent = new intent(intent.action_main,null); 
ntent.addcategory(intent.category_home); 
startactivity(intent); 

//音量减

audiomanager maudiomanager = (audiomanager) getsystemservice(context.audio_service); 
maudiomanager.adjuststreamvolume(audiomanager.stream_music, audiomanager.adjust_lower, 
    audiomanager.fx_focus_navigation_up); 
maudiomanager.adjuststreamvolume(audiomanager.stream_music, audiomanager.adjust_lower, 
    audiomanager.fx_focus_navigation_up); 

以上所述是小编给大家介绍的android 中按home键和跳转到主界面的实例代码，希望对大家有所帮助