Wie kann ich den Status von CheckBox mit gemeinsamen Einstellungen speichern?

Question

Ich habe Registerkarten und Ansicht Pager mit ListView mit Kontrollkästchen, aber wenn ich ein Kontrollkästchen auswählen und ich Registerkarte wechseln und nachdem ich auf vorherige Registerkarte, das Kontrollkästchen zuvor ausgewählt wurde, ist jetzt nicht überprüft.warum?

FRAGMENT:

public class MyListFragment extends Fragment implements 
     android.widget.CompoundButton.OnCheckedChangeListener { 

    ListView lv; 
    ArrayList<Planet> planetList; 
    PlanetAdapter plAdapter; 
    BirraAdapter biAdapter; 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 
     // Inflate the layout for this fragment 
     SharedPreferences preferences = getContext().getSharedPreferences("PROJECT_NAME", android.content.Context.MODE_PRIVATE); 


boolean value = preferences.getBoolean("showActivity", true); 
     String value2 = preferences.getString("KEY", String.valueOf(true)); 
     ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.fragment_list2, container, false); 
     Button mButton = (Button) rootView.findViewById(R.id.button); 
     mButton.setOnClickListener(new View.OnClickListener() { 
      public void onClick(View v) { 
      showResult(v); 
      } 
     }); 
     //return inflater.inflate(R.layout.fragment_list2, container, false); 
     return rootView; 
    } 

    @Override 
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) { 
     super.onViewCreated(view, savedInstanceState); 

     lv = (ListView)getView().findViewById(R.id.listview); 
     displayPlanetList(); 
    } 

    private void displayPlanetList() { 

     planetList = new ArrayList<Planet>(); 
     planetList.add(new Planet("Margherita", 6, "€")); 
     planetList.add(new Planet("Diavola", 7,"€")); 
     planetList.add(new Planet("Bufalina", 5,"€")); 
     planetList.add(new Planet("Marinara", 5,"€")); 
     planetList.add(new Planet("Viennese", 4,"€")); 

     plAdapter = new PlanetAdapter(planetList, getContext()) { 
      @Override 
      public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { 
       int pos = lv.getPositionForView(buttonView); 
       if (pos != ListView.INVALID_POSITION) { 
        Planet p = planetList.get(pos); 
        p.setSelected(isChecked); 

      /*Toast.makeText(
       getActivity(), 
       "Clicked on Pizza: " + p.getName() + ". State: is " 
         + isChecked, Toast.LENGTH_SHORT).show();*/ 
       } 
      } 
     }; 
     lv.setAdapter(plAdapter); 
    } 

    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { 

     /*int pos = lv.getPositionForView(buttonView); 
     if (pos != ListView.INVALID_POSITION) { 
      Planet p = planetList.get(pos); 
      p.setSelected(isChecked); 

    } 
    public void showResult(View v) { 
     String result2 = "Selected Product are :"; 
     int totalAmount2=0; 

     String a=""; 
     for (Birra b : biAdapter.getBox()){ 

      if (b.selected){ 

       result2 += "\n" + b.name+" "+b.distance+"€"+"q.tà :"+b.getQuantità(); 
       int quantitaInt= Integer.parseInt(b.getQuantità()); 
       totalAmount2+=b.distance * quantitaInt; 
       //a=String.valueOf(totalAmount); 

      } 
     } 
    /* for (Planet p : plAdapter.getBox()) { 
      if (p.selected){ 

       result += "\n" + p.name+" "+p.distance+"€"+"q.tà :"+p.getQuantità(); 
       int quantitaInt= Integer.parseInt(p.getQuantità()); 
       totalAmount+=p.distance * quantitaInt; 
       //a=String.valueOf(totalAmount); 


      } 
     }*/ 
     //Toast.makeText(getActivity(), result + "\n" + "Total Amount:=" + totalAmount + "€", Toast.LENGTH_LONG).show(); 
     Toast.makeText(getActivity(), result2 + "\n" + "Total Amount:=" + totalAmount2 + "€", Toast.LENGTH_LONG).show(); 

     /*Bundle bun2 = new Bundle(); 
     bun2.putString("scelta", result); 
     TwoFragment fgsearch2 = new TwoFragment(); 
     fgsearch2.setArguments(bun2); 
     android.support.v4.app.FragmentTransaction transaction2 = getActivity().getSupportFragmentManager().beginTransaction(); 
     transaction2.replace(R.id.content_main, fgsearch2); 
     transaction2.commit(); 
     Bundle bun = new Bundle(); 
     bun.putString("totale", a); 
     TwoFragment fgsearch = new TwoFragment(); 
     fgsearch.setArguments(bun); 
     android.support.v4.app.FragmentTransaction transaction = getActivity().getSupportFragmentManager().beginTransaction(); 
     transaction.replace(R.id.content_main2, fgsearch); 
     transaction.commit(); 
*/ 
    } 
} 

ADAPTER:

public abstract class PlanetAdapter extends ArrayAdapter<Planet> implements CompoundButton.OnCheckedChangeListener 

{ 

    private List<Planet> planetList; 
    private Context context; 
    ArrayList<Birra> objects; 


    public PlanetAdapter(List<Planet> planetList, Context context) { 
     super(context, R.layout.single_listview_item, planetList); 
     this.planetList = planetList; 
     this.context = context; 
    } 
    public class PlanetHolder { 
     public TextView planetName; 
     public TextView distView; 
     public TextView valuta; 
     public CheckBox chkBox; 
     public EditText edit; 
     public String quantità; 
} 
    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 

     View row = convertView; 
     PlanetHolder holder = null; 
     if (row == null) { 
      LayoutInflater inflater = ((Activity) context).getLayoutInflater(); 
      row = inflater.inflate(R.layout.single_listview_item, parent, false); 
      holder = new PlanetHolder(); 
      holder.planetName = (TextView) row.findViewById(R.id.name); 
      holder.distView = (TextView) row.findViewById(R.id.dist); 
      holder.valuta = (TextView) row.findViewById(R.id.valuta); 
      holder.chkBox = (CheckBox) row.findViewById(R.id.chk_box); 
      holder.edit = (EditText) row.findViewById(R.id.editText); 
      holder.edit.setVisibility(View.GONE); 
      holder.edit.setEnabled(false); 
      row.setTag(holder); 
     } else { 
      holder = (PlanetHolder) row.getTag(); 
     } 
     final Planet p = planetList.get(position); 

     holder.chkBox.setOnCheckedChangeListener(PlanetAdapter.this); 
     final PlanetHolder finalHolder = holder; 
     holder.chkBox.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       if (finalHolder.chkBox.isChecked()) { 
        finalHolder.edit.setVisibility(View.VISIBLE); 
        finalHolder.edit.setEnabled(true); 
        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context); 
        SharedPreferences.Editor editor = sharedPreferences.edit(); 
        editor.putBoolean("showActivity", finalHolder.chkBox.isChecked()); 
        editor.commit(); 
        finalHolder.edit.addTextChangedListener(new TextWatcher() { 
         @Override 
         public void beforeTextChanged(CharSequence s, int start, int count, int after) { 
         } 

         @Override 
         public void onTextChanged(CharSequence s, int start, int before, int count) { 
         } 

         @Override 
         public void afterTextChanged(Editable s) { 
          p.setQuantità(finalHolder.edit.getText().toString().trim()); 
          SharedPreferences preferences = getContext().getSharedPreferences("PROJECT_NAME", android.content.Context.MODE_PRIVATE); 
          SharedPreferences.Editor editor = preferences.edit(); 
          editor.putString("KEY", finalHolder.edit.getText().toString()); 
          //editor.putBoolean("chkBox", true); 
          editor.commit(); 
          } 
        }); 
       } else { 
        finalHolder.edit.setVisibility(View.GONE); 
        finalHolder.edit.setEnabled(false); 
        finalHolder.edit.setText(null); 
       } 
      } 
     }); 
     holder.planetName.setText(p.getName()); 
     holder.distView.setText("" + p.getDistance()); 
     holder.valuta.setText(""+p.getValuta()); 
     holder.chkBox.setChecked(p.isSelected()); 
     holder.chkBox.setTag(p); 
     holder.edit.setEnabled(false); 

     return row; 
    } 

    ArrayList<Planet> getBox() { 
     ArrayList<Planet> box = new ArrayList<Planet>(); 
     for (Planet p : planetList) { 
      if (p.selected) 
       box.add(p); 
     } 
     return box; 
    } 


} 

Answer 1

Es ist, weil Ihr Checkbox ist nicht das Ergebnis des Klicks auf sie zu speichern. Einfache Verwendung von SharedPreference zum Speichern von Daten.

Like:

public class UserPreference { 


     SharedPreferences pref; 

    // Editor for Shared preferences 
    SharedPreferences.Editor editor; 

    // Context 
    Context _context; 

    // Shared pref mode 
    int PRIVATE_MODE = 0; 

    // Sharedpref file name 
    private static final String PREF_NAME = "user_preference"; 

    public static final String isSportsCheck = "isSportsChecked"; 
    public static final String isTechnologyCheck = "isTechnologyChecked"; 

    public UserPreference(Context context){ 
     this._context = context; 
     pref = _context.getSharedPreferences(PREF_NAME, PRIVATE_MODE); 
     editor = pref.edit(); 
    } 

    public void createWork(boolean sports, boolean tech){ 
     editor.putBoolean(isSportsCheck, sports); 
     editor.putBoolean(isTechnologyCheck, tech); 
     editor.commit(); 
    } 

    public HashMap<String, String> getWorkDetails(){ 
     HashMap<String, String> user = new HashMap<String, String>(); 
     user.put(isSportsCheck, pref.getBoolean(isSportsCheck, false)); 
     user.put(isTechnologyCheck, pref.getBoolean(isTechnologyCheck, false)); 

     return user; 
    } 

Hier können Sie Sport, Technik mit beliebigen Werten Sie wie Bufalina, Marinara wollen ändern. Verbrauch:

UserPreference u = new UserPreference(getContext()); 
u.createWork(true, true); 

Answer 2

Eine einfache und elegante Lösung ist eine sehr einfache Bibliothek TinyDB in Android zu verwenden, die nichts anderes als eine Abstraktion über die Gemeinschafts-Einstellungen ist.

Sie können es die onCreate in Ihrer Aktivität initialisieren() -Methode wie folgt aus:

TinyDB tinydb = new TinyDB(this); 
And then use it like this: 

tinydb.putString("userName", "john"); 
String currentUser = tinydb.getString("userName"); 

Hoffe, es hilft.