Alles auswählen in Kartenansicht

Question

Ich möchte alle Zeilen auswählen.

CustomAdapter2

public class CustomAdapter2 extends RecyclerView.Adapter<CustomAdapter2.EmpDataViewHolder> { 

    public ArrayList<Employee> emp_arr, filterList; 
    private Context context; 
    public ArrayList<Employee> getEmpList; 

    public CustomAdapter2(Context context, ArrayList<Employee> emp_arr) { 
     this.emp_arr= emp_arr; 
     this.context = context; 
     this.filterList = new ArrayList<Employee>(); 
     this.filterList.addAll(this.emp_arr); 
    } 

    @Override 
    public CustomAdapter2.EmpDataViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     View v = LayoutInflater.from(context).inflate(R.layout.customcard1, parent, false); 
     EmpDataViewHolder edvh = new EmpDataViewHolder(v); 
     return edvh; 
    } 

    @Override 
    public void onBindViewHolder(final CustomAdapter2.EmpDataViewHolder holder, final int position) { 

     Employee employee = new Employee(); 
     employee = filterList.get(position); 
     int pos = position; 

     final String emp_ID = "" + employee.getEmpid(); 
     holder.txt_id.setText(emp_ID); 

     holder.txt_fname.setText(employee.getEmpfname()); 
     holder.txt_lname.setText(employee.getEmplname()); 

     holder.cb1.setChecked(employee.isSelected()); 
     holder.cb1.setTag(employee); 
     holder.cb1.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       CheckBox cb = (CheckBox) v; 
       Employee contact = (Employee) cb.getTag(); 

       contact.setSelected(cb.isChecked()); 
       emp_arr.get(position).setSelected(cb.isChecked()); 

       Toast.makeText(
         v.getContext(), 
         "Clicked on Checkbox: " + cb.getText() + " is " 
           + cb.isChecked(), Toast.LENGTH_LONG).show(); 
      } 
     }); 

     holder.cv.setTag(R.string.KeyForCV, position); 
     holder.cv.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       CardView cv = (CardView) v; 
       Employee emp = filterList.get(position); 
      } 
     });} 

    @Override 
    public int getItemCount() { 
     return filterList.size(); 
    } 

    static class EmpDataViewHolder extends RecyclerView.ViewHolder{ 

     CardView cv; 
     TextView txt_id; 
     TextView txt_fname; 
     TextView txt_lname; 
     CheckBox cb1; 
     CheckBox cb; 
     Boolean checked; 


     public EmpDataViewHolder(View itemView) { 
      super(itemView); 


      cv = (CardView) itemView.findViewById(R.id.cv1); 
      txt_id = (TextView) itemView.findViewById(R.id.id); 
      txt_fname = (TextView) itemView.findViewById(R.id.fname); 
      txt_lname = (TextView) itemView.findViewById(R.id.lname); 
      cb1 = (CheckBox) itemView.findViewById(R.id.c2); 

     } 
    } 
    private ArrayList<Employee> getStudentist() { 
     return emp_arr; 
    }} 

CardView2

public class Cardview2 extends AppCompatActivity { 

    CustomAdapter2 cu; 
    CheckBox selectall,c2; 

    private ArrayList<Employee> Emplist; 


    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_cardview2); 


     RecyclerView rv = (RecyclerView) findViewById(R.id.rv1); 
     rv.setHasFixedSize(true); 

     final ArrayList<Employee> arr = InitializeData(); 

     final LinearLayoutManager llm = new LinearLayoutManager(Cardview2.this); 
     rv.setLayoutManager(llm); 
     rv.setHasFixedSize(true); 

     cu = new CustomAdapter2(Cardview2.this, arr); 
     rv.setAdapter(cu); 

     registerForContextMenu(rv); 


     selectall= (CheckBox) findViewById(R.id.c1); 
     Emplist=new ArrayList<Employee>(); 

     for (int i = 1; i <=Emplist.size(); i++) { 
      Employee st = new Employee(); 

      Emplist.add(st); 
     } 

     selectall.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { 
      @Override 
      public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { 
       String data = ""; 
       ArrayList<Employee> stList = ((CustomAdapter2) cu) 
         .emp_arr; 

       CheckBox cb; 
       cb = (CheckBox) findViewById(R.id.c2); 
    try { for (int i = 0; i < stList.size(); i++) { 
     Employee employee = stList.get(i); 
     if (employee.isSelected() == false) { 
      cb.setChecked(selectall.isChecked()); 
     } 
    }}catch (Exception e){ 
    e.printStackTrace();}[enter image description here][1]} 

     }); 


    } 
     private ArrayList<Employee> InitializeData() { 
      ArrayList<Employee> arr_emp = new ArrayList<>(); 



      DAL dal = new DAL(Cardview2.this); 
      dal.OpenDB(); 
      arr_emp = dal.AllSelectQryForTabEmpData1(); 
      dal.CloseDB(); 
      return arr_emp;}} 

Ich möchte alle Zeilen überprüft werden, wenn SelectAll Checkbox aktiviert ist.

Answer 1

CheckBox cb; 
for (int i = 0; i < rv.getChildCount(); i++) { 
    cb = (CheckBox)rv.getChildAt(i).findViewById(R.id.c2); 
    cb.setChecked(selectall.isChecked()); 
} 

so ist es das, was ich hav die Antwort zu tun jetzt.

Answer 2

Versuchen

cb.setChecked(isChecked) 

statt:

Employee employee = stList.get(i); 
    if (employee.isSelected() == false) { 
     cb.setChecked(selectall.isChecked()); 
    }