Kontrollkästchen aktiviert, wenn Listenansicht Element ausgewählt ist

Question

Also im Wesentlichen habe ich eine Listenansicht, die einen benutzerdefinierten Adapter enthält, der sich mit der Formatierung der Listenansicht befasst. Die benutzerdefinierte Ansicht, die von dem Adapter verwandt wird, enthält ein Kontrolle-Kästchen, das mit dem Scheck überprüft werden soll, der gesperrt wird, wenn das Listenansichtselement ausgewählt wird. Nach vielen Suchen und verschiedenen Versuchen, dies zu erreichen, war ich nicht erfolgreich. Irgendwelche Ideen, wie dies zu erreichen wäre, würden sehr geschätzt werden.

Hier ist der Code für meine Hauptklasse ist:

public class AbWorkout extends Activity { 

Button back; 
ListView workoutExerciseList; 
WorkoutTracker tracker; 

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


    /** 
    * The database used to pull all exercises for this workout routine 
    */ 
    final DatabaseHandler db = new DatabaseHandler(this); 
    final SQLiteDatabase database = db.getReadableDatabase(); 

    final Context context = this; 

    /** 
    * Get all exercises from Triceps and Chest workout and put in arraylist 
    */ 
    workoutExerciseList = (ListView)findViewById(R.id.listView10); 
    final List<String> arrayWorkoutExercises = new ArrayList<String>(); 
    final ArrayAdapter<String> exListAdapter = new ArrayAdapter<String>(this, 
      android.R.layout.simple_list_item_multiple_choice, arrayWorkoutExercises); 
    workoutExerciseList.setAdapter(exListAdapter); 


      //Holds all the available exercises 
    final List<WorkoutTracker> exerciseList = db.getRepetitionWorkoutRoutine(context, database, "Abs"); 

    /** 
    * Populates the listView with each exercise for this workout routine. This includes the 
    * each exercise name, the number of repetitions, the weight of the exercise, and any 
    * comments included. 
    */ 
    List<AbWorkout.RepListViewItem> repProgressList = new ArrayList<>(); 
    for(int i = 0; i<exerciseList.size(); i++) { 
     final int j = i; 
     repProgressList.add(new AbWorkout.RepListViewItem() 
     {{ 
       REPETITIONS = exerciseList.get(j).getReps(); 
       WEIGHT = exerciseList.get(j).getWeight(); 
       COMMENT = exerciseList.get(j).getComment(); 
       EXERCISE_NAME = exerciseList.get(j).getExerciseName(); 
      }}); 


    } 
    final AbViewAdapter adapter = new AbViewAdapter(this, repProgressList); 
    workoutExerciseList.setAdapter(adapter); 


    CheckBox checkBox = (CheckBox)findViewById(R.id.CheckBox); 

    workoutExerciseList.setItemChecked(ListView.CHOICE_MODE_MULTIPLE, true); 

    /* 
     Upon selection of an exercise, it is highlighted and its name, date, 
     and number of reps is stored in repetition progress table 
    */ 
    workoutExerciseList.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
     public void onItemClick(AdapterView<?> myAdapter, View myView, int myItemInt, long mylng) { 

      CheckBox check = (CheckBox) findViewById(R.id.CheckBox); 
      //check.setChecked(true); 

      Calendar calendar = Calendar.getInstance(); 
      SimpleDateFormat format = new SimpleDateFormat("MM/dd/yy"); 
      //Get today's date formatted like this: dd-MM-yy 
      String exDate = format.format(calendar.getTime()); 


      //When exercise is selected, change the color and make it unselectable. 
      myAdapter.getChildAt(myItemInt).setBackgroundColor(Color.MAGENTA); 
      myAdapter.getChildAt(myItemInt).setEnabled(false); 
      myAdapter.getChildAt(myItemInt).setClickable(false); 
      myView.setClickable(true); 


      tracker = exerciseList.get(myItemInt); 
      db.addNewRepProgress(new WorkoutTracker(tracker.getExerciseName(), tracker.getReps(), tracker.getWeight(), tracker.getComment(), exDate), context, database); 
      Toast.makeText(context.getApplicationContext(), "Workout Progress was successfully saved.", Toast.LENGTH_LONG).show(); 

     } 
    }); 


    back = (Button)findViewById(R.id.back); 
    back.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      finish(); 
     } 
    }); 
} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.menu_ab_workout, menu); 
    return true; 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    // Handle action bar item clicks here. The action bar will 
    // automatically handle clicks on the Home/Up button, so long 
    // as you specify a parent activity in AndroidManifest.xml. 
    int id = item.getItemId(); 

    //noinspection SimplifiableIfStatement 
    if (id == R.id.action_settings) { 
     return true; 
    } 

    return super.onOptionsItemSelected(item); 
} 


public class RepListViewItem 
{ 
    public int REPETITIONS; 
    public double WEIGHT; 
    public String COMMENT; 
    public String EXERCISE_NAME; 
    public String DATE; 
} 
} 

Und hier ist der Code für meine Adapterklasse:

public class AbViewAdapter extends BaseAdapter 
{ 

LayoutInflater inflater; 
List<AbWorkout.RepListViewItem> items; 
int pos = 0; 

public AbViewAdapter(Activity context, List<AbWorkout.RepListViewItem> items) { 
    super(); 

    this.items = items; 
    this.inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
} 

@Override 
public int getCount() { 
    // TODO Auto-generated method stub 
    return items.size(); 
} 

@Override 
public Object getItem(int position) { 
    // TODO Auto-generated method stub 
    return null; 
} 

@Override 
public long getItemId(int position) { 
    // TODO Auto-generated method stub 
    return 0; 
} 

@Override 
public View getView(final int position, View convertView, ViewGroup parent) { 
    // TODO Auto-generated method stub 

    AbWorkout.RepListViewItem item = items.get(position); 
    View vi=convertView; 

    if(convertView==null) 
     vi = inflater.inflate(R.layout.rep_item_row, null); 


    TextView exerciseName = (TextView)vi.findViewById(R.id.FullProgress); 
    TextView exerciseReps = (TextView)vi.findViewById(R.id.Time); 
    TextView exerciseComment = (TextView)vi.findViewById(R.id.Comment); 
    TextView exerciseWeight = (TextView)vi.findViewById(R.id.Distance); 
    CheckBox check = (CheckBox)vi.findViewById(R.id.CheckBox); 

    exerciseName.setText(item.EXERCISE_NAME); 
    exerciseReps.setText(String.valueOf(item.REPETITIONS)); 
    exerciseComment.setText(item.COMMENT); 
    exerciseWeight.setText(String.valueOf(item.WEIGHT)); 

    pos = position; 

    return vi; 
} 
} 

Answer 1

In Ihrem AbViewAdapter.getView() ein OnClickListener

Dann fügen, in der OnClickListener, schalten Sie die Checkbox Zustand mit: check.setChecked(!isChecked())

Voll Antwort hier: Android listview with check boxes?

Voll Tutorial hier: http://www.mysamplecode.com/2012/07/android-listview-checkbox-example.html

Answer 2

, weil, wenn Sie Ihre Listenansicht bewegen, wird das Element in A zerstört. Wenn Sie nach oben scrollen, wird das Objekt in A neu erstellt.

So ist die CheckBox ist neu erstellen zu müssen Sie Artikel speichern, wenn diese aktuellen Zustand wiederherzustellen, wenn Scroll-up. Lassen Sie sehen ViewHolder