Überprüfen Sie das Feld in der Recyler-Ansicht Android

Question

Ich muss jedes Feld in recylerview validieren. Ich habe den besten Ansatz für die Validierung nicht gefunden. Die jeweils EditText Bereich müssen Validierung, wenn der Wert empty.Show der Toast Nachricht auf jeden leeren Wert

Benutzerdefinierte XML-Datei

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:orientation="vertical"> 

    <android.support.v7.widget.CardView 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_margin="@dimen/carview_margin"> 

     <LinearLayout 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:orientation="vertical"> 


      <android.support.design.widget.TextInputLayout 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_weight="1"> 

       <EditText 
        android:id="@+id/ET_CT_foodeaten" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:hint="Food Eaten" 
        android:imeActionLabel="Food Eaten" 
        android:imeOptions="actionUnspecified" 
        android:maxLines="1" 
        android:singleLine="true" /> 
      </android.support.design.widget.TextInputLayout> 


      <RelativeLayout 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content"> 


       <RelativeLayout 
        android:id="@+id/rel_serving" 
        android:layout_width="wrap_content" 
        android:layout_alignParentLeft="true" 
        android:layout_height="wrap_content"> 

        <LinearLayout 
         android:id="@+id/linear_ser" 
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content" 
         android:orientation="vertical"> 

         <TextView 
          android:layout_width="wrap_content" 
          android:layout_height="wrap_content" 
          android:layout_gravity="center" 
          android:layout_margin="@dimen/carview_margin" 
          android:text="Servings Eaten" 
          android:textSize="18dp" /> 

         <LinearLayout 
          android:layout_width="wrap_content" 
          android:layout_height="wrap_content" 
          android:layout_gravity="center" 
          android:layout_marginTop="-10dp" 
          android:background="@drawable/linear_layout_radius_custom" 
          android:orientation="horizontal"> 

          <ImageView 
           android:layout_width="60sp" 
           android:id="@+id/minus_foodeaten" 
           android:layout_height="50sp" 
           android:padding="@dimen/carview_margin" 
           android:src="@drawable/minus" /> 

          <View 
           android:layout_width="1dp" 
           android:layout_height="35sp" 
           android:layout_gravity="center" 
           android:background="@color/TabHeaderColor" /> 

          <ImageView 
           android:layout_width="60sp" 
           android:layout_height="50sp" 
           android:id="@+id/add_foodeaten" 
           android:padding="@dimen/carview_margin" 
           android:src="@drawable/ic_add" /> 
         </LinearLayout> 


        </LinearLayout> 

        <LinearLayout 
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content" 
         android:gravity="center" 
         android:layout_centerVertical="true" 
         android:layout_toRightOf="@+id/linear_ser" 
         android:orientation="vertical"> 

         <ImageView 
          android:id="@+id/IMG_info" 
          android:layout_width="wrap_content" 
          android:layout_marginRight="15dp" 
          android:layout_height="wrap_content" 
          android:src="@drawable/info" /> 

         <TextView 
          android:id="@+id/value_serving" 
          android:layout_width="wrap_content" 
          android:layout_height="wrap_content" 
          android:layout_gravity="center" 
          android:layout_marginRight="15dp" 
          android:text="0" 
          android:textSize="18dp" /> 
        </LinearLayout> 


       </RelativeLayout> 

       <View 
        android:layout_width="1dp" 
        android:id="@+id/space_view" 
        android:layout_height="80sp" 
        android:layout_centerVertical="true" 
        android:layout_centerHorizontal="true" 
        android:background="@color/TabHeaderColor" /> 

       <RelativeLayout 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:layout_alignParentRight="true" 
        android:layout_toRightOf="@+id/rel_serving"> 

        <TextView 
         android:id="@+id/label_food" 
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content" 
         android:layout_alignParentRight="true" 
         android:layout_gravity="center" 
         android:layout_margin="@dimen/carview_margin" 
         android:text="Food Group" 
         android:textSize="18dp" /> 

        <Spinner 
         android:id="@+id/CS_food_group_spinner" 
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content" 
         android:layout_alignParentRight="true" 
         android:layout_below="@+id/label_food" 
         android:layout_margin="@dimen/carview_margin" 
         android:drawSelectorOnTop="true" 
         android:spinnerMode="dropdown" /> 
       </RelativeLayout> 
      </RelativeLayout> 
     </LinearLayout> 
    </android.support.v7.widget.CardView> 

</LinearLayout> 

Adapter Code

public class CustomDataAdapterRecylerview erstreckt RecyclerView.Adapter { private Listenwerte; private Aktivität Aktivität; AlertDialog alertDialogStores; Schnur [] foodLists; FoodList [] val_list; private statische final int MAX_ARRAY_SIZE = Integer.MAX_VALUE - 8; FoodList food_list_value;

public CustomDataAdapterRecylerview(List<String> values, Activity context) { 
    this.values = values; 
    this.activity = context; 
} 

@Override 
public CustomDataAdapterRecylerview.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) { 
    View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.edittext_twospinner, viewGroup, false); 
    return new ViewHolder(view); 
} 

@Override 
public void onBindViewHolder(ViewHolder viewHolder, int position) { 
    final ViewHolder holder = viewHolder; 
    final int pos = position; 
    viewHolder.info.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      showPopUp(); 
     } 
    }); 
    final ArrayAdapter<CharSequence> foodGroup_adapter = ArrayAdapter.createFromResource(activity, R.array.Food_Group, android.R.layout.simple_spinner_item); 
    foodGroup_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
    viewHolder.FoodGroup_spinner.setAdapter(foodGroup_adapter); 
    foodLists = new String[100]; 
    val_list = new FoodList[100]; 
    food_list_value = new FoodList(); 


    viewHolder.FoodGroup_spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 
     @Override 
     public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 
      food_list_value.setServingsEaten(parent.getItemAtPosition(position).toString()); 

      SingletonAddValueFoodTracker.getInstance().setList_values(val_list); 
     } 

     @Override 
     public void onNothingSelected(AdapterView<?> parent) { 

     } 
    }); 


    viewHolder.setClickListener(new RecyclerViewItemClickListener() { 
     @Override 
     public void onClick(View view, int position, boolean isLongClick) { 
      if (view.getId() == holder.Add_Food_Item.getId()) { 
       int val = Integer.parseInt(holder.valueserving.getText().toString()); 
       if (val < 15) { 
        val++; 
        food_list_value.setServingsEaten(String.valueOf(val)); 

        SingletonAddValueFoodTracker.getInstance().setList_values(val_list); 
       } 
       holder.valueserving.setText(String.valueOf(val)); 
      } else if (view.getId() == holder.Minus_Food_Item.getId()) { 
       int val = Integer.parseInt(holder.valueserving.getText().toString()); 
       if (val != 0) { 
        val--; 
        food_list_value.setServingsEaten(String.valueOf(val)); 

        SingletonAddValueFoodTracker.getInstance().setList_values(val_list); 
       } 
       holder.valueserving.setText(String.valueOf(val)); 
      } 
      { 
       //Toast.makeText(view.getContext(), "ROW PRESSED = " + String.valueOf(position), Toast.LENGTH_SHORT).show(); 
      } 
     } 
    }); 


    viewHolder.Food_Eaten.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) { 
       foodLists[pos] = String.valueOf(s); 
       food_list_value.setFoodEaten(foodLists[pos]); 
       val_list[pos] = food_list_value; 
       SingletonAddValueFoodTracker.getInstance().setList_values(val_list); 

     } 
    }); 


} 

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

public void addItem(String country) { 
    values.add(country); 
    notifyItemInserted(values.size()); 
} 

public void removeItem(int position) { 
    values.remove(position); 
    notifyItemRemoved(position); 
    notifyItemRangeChanged(position, values.size()); 
} 

private void showPopUp() { 

    // add your items, this can be done programatically 
    // your items can be from a database 
    List<FoodTrackerAlertDialogModel> ObjectItemData = new ArrayList<FoodTrackerAlertDialogModel>(); 
    ObjectItemData.add(new FoodTrackerAlertDialogModel("Fruit", "1 medium-sized piece of fruit", "1/2 cup berries", "3/4 cup fruit/veggie juice")); 
    ObjectItemData.add(new FoodTrackerAlertDialogModel("Vege\ntables", "1/2 cup raw not-leafy veggies", "1 cup raw leafy veggies", "1 small baked potato")); 
    ObjectItemData.add(new FoodTrackerAlertDialogModel("Dairy", "8 ounces milk", "1 cup yogurt", "1/2 ounces of cheese")); 
    ObjectItemData.add(new FoodTrackerAlertDialogModel("Grains", "1 slice bread", "1 ounce dry cereal", "1/2 cup cooked rice or pasta")); 
    ObjectItemData.add(new FoodTrackerAlertDialogModel("Lean\nMeat\nPoultry", "3 ounces cooked lean meat", "skinless poultry (about the size of a deck of cards)", "1 egg")); 
    ObjectItemData.add(new FoodTrackerAlertDialogModel("Fish", "", "2 to 3 oz. (about the size of the palm of a woman&apos;s hand)", "")); 
    ObjectItemData.add(new FoodTrackerAlertDialogModel("Snacks", "15 potato chips", "2 small cookies", "1/2 cup ice cream")); 
    ObjectItemData.add(new FoodTrackerAlertDialogModel("Fats\nOils", "2 tablespoons light salad dressing", "1 tablespoon low-fat margarine or mayonnaise", "1 teaspoon vegetable oil")); 

    // our adapter instance 
    ListViewArrayAdapter adapter = new ListViewArrayAdapter(activity, R.layout.listview_fourtextview, ObjectItemData); 

    // create a new ListView, set the adapter and item click listener 
    ListView listViewItems = new ListView(activity); 
    listViewItems.setAdapter(adapter); 
    //listViewItems.setOnItemClickListener(new OnItemClickListenerListViewItem()); 

    // put the ListView in the pop up 
    alertDialogStores = new AlertDialog.Builder(activity) 
      .setView(listViewItems) 
      .setTitle("Examples of what a serving\n").setPositiveButton("Back", new DialogInterface.OnClickListener() { 
       @Override 
       public void onClick(DialogInterface dialog, int which) { 
        alertDialogStores.dismiss(); 
       } 
      }) 
      .show(); 

} 


public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, View.OnLongClickListener { 
    EditText Food_Eaten; 
    ImageView info, Add_Food_Item, Minus_Food_Item; 
    Spinner FoodGroup_spinner; 
    TextView valueserving; 
    private RecyclerViewItemClickListener clickListener; 

    public ViewHolder(View view) { 
     super(view); 
     info = (ImageView) view.findViewById(R.id.IMG_info); 
     Food_Eaten = (EditText) view.findViewById(R.id.ET_CT_foodeaten); 
     FoodGroup_spinner = (Spinner) view.findViewById(R.id.CS_food_group_spinner); 
     valueserving = (TextView) view.findViewById(R.id.value_serving); 
     Add_Food_Item = (ImageView) view.findViewById(R.id.add_foodeaten); 
     Minus_Food_Item = (ImageView) view.findViewById(R.id.minus_foodeaten); 
     view.setOnClickListener(this); 
     view.setOnLongClickListener(this); 
     Add_Food_Item.setOnClickListener(this); 
     Minus_Food_Item.setOnClickListener(this); 
    } 

    public void setClickListener(RecyclerViewItemClickListener recyclerViewItemClickListener) { 
     this.clickListener = recyclerViewItemClickListener; 
    } 

    @Override 
    public void onClick(View v) { 
     clickListener.onClick(v, getPosition(), false); 
    } 

    @Override 
    public boolean onLongClick(View view) { 
     clickListener.onClick(view, getPosition(), true); 
     return true; 
    } 
} 

}

Bei Klick auf richtiges Symbol, wenn das Bearbeiten von Text einer Validierungsanforderung leer durchführt und einen Toast Meldung.

Answer 1

Sie müssen diese Überprüfung verwenden und Ihren Toast in else Teil und Ihre Implementierung in if Teil drucken -

if (edittext.getText().length() > 0) { 
    // perform action here 
} else { 
    // show toast here if edittext is empty 
} 

Hoffe, dass es Ihnen behilflich sein können.