recylerビューのフィールドを検証するandroid

Question

recylerviewの各フィールドを検証する必要があります。私は、検証を実行するための最良のアプローチを見つけられませんでした。各EDITTEXTフィールド値はempty.Showトーストメッセージである場合

<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> 

各空値

カスタムXMLファイルを検証する必要がアダプタコード

パブリッククラスCustomDataAdapterRecylerviewがRecyclerView.Adapter { を拡張

プライベートリストの値。 プライベートアクティビティアクティビティ。 AlertDialog alertDialogStores; String [] foodLists; FoodList [] val_list; プライベートstatic final int MAX_ARRAY_SIZE =整数.MAX_VALUE - 8; フードリストfood_list_value;正しいアイコンのクリックで

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; 
    } 
} 

}

エディットテキストが空の場合、検証のニーズが行うとトーストメッセージが表示されます。

あなたは、このチェックを使用して if一部に else部分であなたのトーストと実装を印刷する必要がある

Answer 1

-

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

は、それはあなたの助けになることも願っています。