Question

这是我的片段类。每次“职员”改变时，

我尝试了几种方法。

触发重新创建整个活动。由于巨大的列表（为片段填充了200多个项目），这将导致几秒滞后。
我会使用findFragmentbyTag从主活动触发此片段上的displayList。
从mainActivity中删除所有childView并将其添加回来。

是否有任何其他解决方案（或上述解决方案中的哪一个），以便我可以“立即”以快速有效的方式“刷新”此列表（片段）使用多个linearlayout填充。

只是添加我在V4片段和使用PagerAdapter从主要活动动态生成的片段。非常感谢！

public class EncounterFragment extends Fragment {

    ListView list;
    TextView eid;
    TextView eclerkship;
    TextView ename;
    TextView etype;
    TextView erequiredattempts;


    // DATABASE ADAPTOR
    private eAndPDbAdapter encounterDB;
    private Context myContext = getActivity();

    //arrayAdapter
    ListAdapter adapter;
    CheckBox cBox = null; 

    //Button Btngetdata;
    ArrayList<HashMap<String, String>> encountersList = new ArrayList<HashMap<String, String>>();

    //various layout
    ListView encounterList;

    static String value;
    private EditText filterText = null;

    private  Cursor mCursor; 
    private Cursor cCursor; 

    String clerkShip = "null"; 



    //JSON Node Names 
    private static final String TAG_ENCOUNTERS = "encounters";
    private static final String TAG_E_ID = "e_id";
    private static final String TAG_E_CLERKSHIP = "clerkship";
    private static final String TAG_E_NAME = "encounter_name";  
    private static final String TAG_E_TYPE = "type";
    private static final String TAG_E_REQUIRED_ATTEMPTS = "required_attempts";

    //JSONArray android = null;


    private List<String> nameList = new ArrayList(); 
    private List<String> idList = new ArrayList(); 
    private List<String> typeList = new ArrayList(); 
    private List<String> countList = new ArrayList(); 
    public  List encounterSelected = new ArrayList();   


    public static final String ARG_SECTION_NUMBER = "section_number";

    public EncounterFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        myContext = getActivity();

        View rootView = inflater.inflate(R.layout.activity_encounter,
                container, false);

           encountersList = new ArrayList<HashMap<String, String>>();
            displayList();
            LinearLayout parentLayout = (LinearLayout) rootView.findViewById(R.id.encounterslist);


            for(int i = 0 ; i<nameList.size();i++)
            {
                View v = getLayoutInflater(savedInstanceState).inflate(R.layout.list_v, null);
                final LinearLayout single = (LinearLayout) v.findViewById(R.id.listV);
                single.setOnClickListener(new View.OnClickListener() {

                    @Override
                    public void onClick(View v) {
                        LinearLayout nestedLL  = (LinearLayout) single.getChildAt(1);
                        CheckBox cb = (CheckBox) nestedLL.getChildAt(0);
                        if(cb.isChecked())
                        {
                            cb.setChecked(false);
                            single.setBackgroundColor(Color.TRANSPARENT);
                        }
                        else
                        {
                            cb.setChecked(true);
                            single.setBackgroundColor(Color.rgb(255, 215, 0));;
                        }
                    }
                });
                TextView ID = (TextView) v.findViewById(R.id.eid);
                TextView name = (TextView) v.findViewById(R.id.ename);
                TextView count = (TextView) v.findViewById(R.id.eCount);

                String nameValue = nameList.get(i).toString();
                String IDValue = idList.get(i).toString();
                String typeValue = typeList.get(i).toString(); 
            String countValue = countList.get(i).toString();

                if (typeValue.equals("Must see"))
                {
                    nameValue = nameValue + "**";
                }
                else
                {
                    nameValue = nameValue + "*";
                }

                name.setText(nameValue);
                ID.setText(IDValue);
                count.setText(" (" + countValue + ")");
                parentLayout.addView(v);
            }



        return rootView;
    }

    public void displayList()
    {
          displaySharedPreferences();

        encounterDB = new eAndPDbAdapter(myContext);
        encounterDB.open();
        mCursor = encounterDB.retrieveAllEncounterCursor(clerkShip);
        if ((mCursor != null) && (mCursor.getCount() > 0)) {
            mCursor.moveToFirst();
            {
            do {
                String eID = mCursor.getString(1);
                String encounter_name = mCursor.getString(3);
                String encounter_type = mCursor.getString(4);
                this.idList.add(eID);
                this.nameList.add(encounter_name);
                this.typeList.add(encounter_type);
                //change to procedure if this is procedure 
                cCursor = encounterDB.retrieveEncounterCounterBasedOnID(eID);
                int count2 =cCursor.getCount();
                if ((cCursor != null) && (count2 > 0)) {
                    cCursor.moveToFirst();
                    String NumCount = cCursor.getString(3);
                    this.countList.add(NumCount);
                }
                else
                {
                    this.countList.add("0");
                }

            }

            // move to the next row
            while (mCursor.moveToNext());
    }
        }
        encounterDB.close(); 

    }



public void displaySharedPreferences() {
    SharedPreferences prefs = PreferenceManager
            .getDefaultSharedPreferences(myContext);

    String listPrefs = prefs.getString("listpref", "No Clerkship Selected");

    StringBuilder builder2 = new StringBuilder();
    builder2.append(listPrefs);
clerkShip = builder2.toString();
}   
}

LinearLayout片段列表刷新

0 个答案: