مشکل درModuleWebservice

من لیستم بعضی وقتا پر میشه و بعضی وقتا نمیشه ..
وقتی لیستم پر هست و وارد قسمت faviorite  میشم و لیست خالی هست و حتما باید دوبار برگردم ب صفحه ی قبل و دوباره برم توو همون صفحه تا اون آیتمی که Faviorite شده رو نشون بده ..
 این لیست اصلی بنده :

 public class ActivityMusicsList extends EnhancedActivity {

    private ListView                      list;
    private static AdapterMusic           adapter;
    private Button                        btn_music_back;
    private ImageView                     imgFAV;

    private static ArrayList<StructMusic> musics = new ArrayList<StructMusic>();


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_music_list);

        list = (ListView) findViewById(R.id.list);
        btn_music_back = (Button) findViewById(R.id.btn_music_back);
        imgFAV = (ImageView) findViewById(R.id.imgFAV);

        btn_music_back.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {

                Intent intent = new Intent(G.currentActivity, ActivityContent.class);
                G.currentActivity.startActivity(intent);
                G.currentActivity.finish();

            }
        });
        imgFAV.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {

                Intent intent = new Intent(G.currentActivity, ActivityFAV_Music.class);
                G.currentActivity.startActivity(intent);

            }
        });

        adapter = new AdapterMusic(musics);
        list.setAdapter(adapter);
        populateFromServer();
    }


    @Override
    protected void onResume() {
        super.onResume();
        adapter.notifyDataSetChanged();
    }


    public static void populateFromServer() {
        ModuleWebservice module = new ModuleWebservice();
        ModuleWebservice.Listener listener = new ModuleWebservice.Listener() {

            @Override
            public void onDataReceive(String data) {
                Log.i("LOG", "Webservice Data: " + data);
                if (data != null) {
                    try {

                        musics.clear();
                        JSONArray apps = new JSONArray(data);
                        for (int i = 0; i < apps.length(); i++) {
                            JSONObject object = apps.getJSONObject(i);
                            StructMusic music = new StructMusic();

                            music.id = object.getLong("music_id");
                            music.music_name = object.getString("music_name");
                            music.singer_name = object.getString("music_singer_name");

                            music.logoUrl = object.getString("music_logoUrl");
                            music.file = object.getString("music_file");

                            musics.add(music);
                            Log.i("LOG", "file = " + music.file + "music_id = " + music.id + "MusicName = " + music.music_name + "singerName= " + music.singer_name + "logoUrl=" + music.logoUrl);

                        }
                        adapter.notifyDataSetChanged();

                    }

                    catch (JSONException e) {
                        e.printStackTrace();
                    }
                }
            }


            @Override
            public void onFail(int statusCode) {
                switch (statusCode) {
                    case ModuleWebservice.IO_EXCEPTION:
                        Log.i("LOG", "IO Exception");
                        break;

                    case ModuleWebservice.PROTOCOL_EXCEPTION:
                        Log.i("LOG", "PROTOCOL Exception");
                        break;

                    case ModuleWebservice.UNKNOWN_EXCEPTION:
                        Log.i("LOG", "UNKNOWN Exception");
                        break;
                }
            }
        };

        ArrayList<NameValuePair> input = new ArrayList<NameValuePair>();

        module.url("http://169.254.72.1/Folkolor/services.php?action=read", null)
                .inputArguments(input)
                .listener(listener)
                .cacheDir(G.DIR_CACHE)
                .enableCache(true)
                .cacheExpireTime(3)
                .connectionTimeout(3000)
                .socketTimeout(5000)
                .read();

    }


    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {

            Intent intent = new Intent(G.currentActivity, ActivityContent.class);
            G.currentActivity.startActivity(intent);
            G.currentActivity.finish();
        }
        return true;
    }

}

و اینم لیست faviorite من که برا دفعه ی اول خالی هست .. (( درون log  اطلاعات به درستی دریافت میشه ))

 public class ActivityFAV_Music extends EnhancedActivity {

    private ListView                      list;
    private static AdapterMusic           adapter;
    private Button                        btn_music_back;

    private static ArrayList<StructMusic> musics = new ArrayList<StructMusic>();


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_fav_music);

        list = (ListView) findViewById(R.id.list);
        btn_music_back = (Button) findViewById(R.id.btn_music_back);

        btn_music_back.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {

                Intent intent = new Intent(G.currentActivity, ActivityMusicsList.class);
                G.currentActivity.startActivity(intent);
                //    G.currentActivity.finish();

            }
        });

        adapter = new AdapterMusic(musics);
        list.setAdapter(adapter);

        populateFromServer();
    }


    @Override
    protected void onResume() {
        super.onResume();
        adapter.notifyDataSetChanged();
    }


    public static void populateFromServer() {
        ModuleWebservice module = new ModuleWebservice();
        ModuleWebservice.Listener listener = new ModuleWebservice.Listener() {

            @Override
            public void onDataReceive(String data) {
                Log.i("LOG", "Webservice Data: " + data);
                if (data != null) {
                    try {

                        musics.clear();
                        JSONArray apps = new JSONArray(data);
                        for (int i = 0; i < apps.length(); i++) {
                            JSONObject object = apps.getJSONObject(i);
                            StructMusic music = new StructMusic();

                            music.id = object.getLong("music_id");
                            music.music_name = object.getString("music_name");
                            music.singer_name = object.getString("music_singer_name");

                            music.logoUrl = object.getString("music_logoUrl");
                            music.file = object.getString("music_file");

                            musics.add(music);
                            Log.i("LOG", "file = " + music.file + "music_id = " + music.id + "MusicName = " + music.music_name + "singerName= " + music.singer_name + "logoUrl=" + music.logoUrl);

                        }
                        adapter.notifyDataSetChanged();

                    }

                    catch (JSONException e) {
                        e.printStackTrace();
                    }
                }
            }


            @Override
            public void onFail(int statusCode) {
                switch (statusCode) {
                    case ModuleWebservice.IO_EXCEPTION:
                        Log.i("LOG", "IO Exception");
                        break;

                    case ModuleWebservice.PROTOCOL_EXCEPTION:
                        Log.i("LOG", "PROTOCOL Exception");
                        break;

                    case ModuleWebservice.UNKNOWN_EXCEPTION:
                        Log.i("LOG", "UNKNOWN Exception");
                        break;
                }
            }
        };

        String aid = G.android_id;
        ArrayList<NameValuePair> input = new ArrayList<NameValuePair>();
        input.add(new BasicNameValuePair("aid", aid));

        module.url("http://169.254.72.1/Folkolor/services.php?action=readfav", input)
                .inputArguments(input)
                .listener(listener)
                .cacheDir(G.DIR_CACHE)
                .enableCache(true)
                .cacheExpireTime(3)
                .connectionTimeout(3000)
                .socketTimeout(5000)
                .read();
    }
}