java - call method from non-Activity class android -
i have popup window (non-activity class) have buttons. 1 of them (btn_audio), play or pause sound , works charm. want call 2 method, play() , pause() in homeactivity , inside of onstop() method in of activity's. doesn't work, call play() , pause() in other activity's occur nullpointexeption! help...
public class popup_menu extends activity implements onclicklistener { button btn_audio; public static mediaplayer player; string play_or_pause; int num_ply, tim_pos; int [] resid;// audio sharedpreferences sp; void showpopup(final activity context) { this.context=context; linearlayout viewgroup = (linearlayout) context.findviewbyid(r.id.popup); layoutinflater layoutinflater = (layoutinflater) context.getsystemservice(context.layout_inflater_service); layout = layoutinflater.inflate(r.layout.popup_layout_menu, viewgroup); sp = context.getsharedpreferences("text", mode_private); btn_audio = (button) layout.findviewbyid(r.id.btn_audio); // audio layout.findviewbyid(r.id.btn_audio).setonclicklistener(this); @override public void onclick(view whichbuttonisclicked) { switch (whichbuttonisclicked.getid()) { case r.id.btn_audio: if (play_or_pause.equals("play")) { pause(); } else { play(context); } sp.edit().putstring("play_or_pause", play_or_pause).commit(); // save current stat } ////// close of showpopup() //define play , pause methods public void pause() { player.pause(); btn_audio.setbackgroundresource(r.drawable.icon_audio_pause); play_or_pause="pause"; // current state 'pause' } public void play(final context context) { if(num_ply==9){num_ply=0; } resid = new int []{ r.raw.tarane,r.raw.toofan,r.raw.shane,r.raw.kharazmi,r.raw.golhaye_khofte,r.raw.rang,r.raw.naghmeh,r.raw.dar_rahe_to,r.raw.emperor}; player=mediaplayer.create(context,resid[num_ply]); player.seekto(tim_pos); player.start(); btn_audio.setbackgroundresource(r.drawable.icon_audio_play); play_or_pause="play"; // current state 'play' player.setoncompletionlistener(new oncompletionlistener() { public void oncompletion(mediaplayer player) { tim_pos=0; num_ply++; play(context); } }); } } and homeactivity :
public class homeactivity extends activity implements onclicklistener { popup_menu ppp; @override protected void oncreate.............. ppp = new popup_menu(); sharedpreferences sp = getsharedpreferences("text", mode_private); if(sp.getstring("play_or_pause", "play").equals("pause")){ ppp.play(getapplicationcontext()); // error } // audio } /// close of oncreate @override public void onstop() { super.onstop(); if(play_or_pause.equals("play")){ ppp.tim_pos= ppp.player.getcurrentp ok, decided use service resolve problem , works play(). when playing, still can't call pause() method soundservice because player object null. think creating object, soundservice class, (ss in popup_menu class) , default constructor put player value null (when playing , player object wasn't null). , calling player.pause occur error. how please can pause one_week_friend!!!
public class soundservice extends service { mediaplayer player; int num_ply, tim_pos; int [] resid; public int onstartcommand(intent intent, int flags, int startid) { resid = new int []{ r.raw.tarane,r.raw.toofan,r.raw.shane,r.raw.kharazmi, r.raw.golhaye_khofte,r.raw.rang,r.raw.naghmeh,r.raw.dar_rahe_to,r.raw.emperor }; player=mediaplayer.create(this,resid[num_ply]); play(); return service.start_flag_redelivery; } public void play() { if(num_ply==9){num_ply=0; } player.seekto(tim_pos); player.start(); player.setoncompletionlistener(new oncompletionlistener() { public void oncompletion(mediaplayer player) { tim_pos=0; num_ply++; play(); } }); } public void resume(){ player.seekto(tim_pos); player.start(); } public void pause() { tim_pos= player.getcurrentposition(); ////// error player.pause(); ////// error num_ply++; } public ibinder onbind(intent arg0) { // todo auto-generated method stub return null; } } and popup_menu class:
@override public void onclick(view whichbuttonisclicked) { switch (whichbuttonisclicked.getid()) { case r.id.btn_audio: if (play_or_pause.equals("play")) { btn_audio.setbackgroundresource(r.drawable.icon_audio_pause); play_or_pause="pause"; // current state 'pause' soundservice ss = new soundservice(); ss.pause(); ////// error } else { btn_audio.setbackgroundresource(r.drawable.icon_audio_play); play_or_pause="play"; // current state 'play' intent sound_intent = new intent(context , soundservice.class); // start service context.startservice(sound_intent); } sp.edit().putstring("play_or_pause", play_or_pause).commit(); // save current state break; logcat:
08-05 01:03:31.440: e/androidruntime(25356): fatal exception: main 08-05 01:03:31.440: e/androidruntime(25356): java.lang.nullpointerexception 08-05 01:03:31.440: e/androidruntime(25356): @ com.codegostarniloo.negar.soundservice.pause(soundservice.java:47) 08-05 01:03:31.440: e/androidruntime(25356): @ com.codegostarniloo.negar.popup_menu.onclick(popup_menu.java:234) 08-05 01:03:31.440: e/androidruntime(25356): @ android.view.view.performclick(view.java:4209) 08-05 01:03:31.440: e/androidruntime(25356): @ android.view.view$performclick.run(view.java:17457) 08-05 01:03:31.440: e/androidruntime(25356): @ android.os.handler.handlecallback(handler.java:725) 08-05 01:03:31.440: e/androidruntime(25356): @ android.os.handler.dispatchmessage(handler.java:92) 08-05 01:03:31.440: e/androidruntime(25356): @ android.os.looper.loop(looper.java:153) 08-05 01:03:31.440: e/androidruntime(25356): @ android.app.activitythread.main(activitythread.java:5341) 08-05 01:03:31.440: e/androidruntime(25356): @ java.lang.reflect.method.invokenative(native method) 08-05 01:03:31.440: e/androidruntime(25356): @ java.lang.reflect.method.invoke(method.java:511) 08-05 01:03:31.440: e/androidruntime(25356): @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:929) 08-05 01:03:31.440: e/androidruntime(25356): @ com.android.internal.os.zygoteinit.main(zygoteinit.java:696) 08-05 01:03:31.440: e/androidruntime(25356): @ dalvik.system.nativestart.main(native method) 08-05 01:03:32.066: d/dalvikvm(25356): threadid=11: interp stack @ 0x5f1c9000 thank's lot...
first, off, don't extend activity if it's non activity, claim, passing context preferred on activity
secondly, there class called dialogfragment intended used popup dialog
i think looking following, though
public class popup_menu implements onclicklistener { button btn_audio; public mediaplayer player; string play_or_pause; int num_ply, tim_pos; int [] resid;// audio sharedpreferences sp; context context ; public popup_menu(final context context) { this.context= context; sp = this.context.getsharedpreferences("text", context.mode_private); // linearlayout viewgroup = (linearlayout) view.findviewbyid(r.id.popup); layoutinflater layoutinflater = layoutinflater.from(this.context); layout = layoutinflater.inflate(r.layout.popup_layout_menu, viewgroup); btn_audio = (button) layout.findviewbyid(r.id.btn_audio); // audio btn_audio.setonclicklistener(this); } you can create new popup_menu(homeactivity.this)
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