android - 检查解析数组列是否包含某些值

Question

我正在尝试搜索我在解析中包含成分的数组列是否包含用户给定的成分，出于某种原因，没有查询对我有用，它总是返回 null。

有什么建议吗？

谢谢。

我的代码:

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import com.parse.FindCallback;
import com.parse.GetCallback;
import com.parse.ParseException;
import com.parse.ParseObject;
import com.parse.ParseQuery;

import android.app.Activity;
import android.app.DownloadManager.Query;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;

public class FridgeRecipe extends Activity 
{
    ListView ingsListView;
    EditText ingredientEt;
    TextView mainTitleTv, endTileTv;
    Button addingBtn, searchBtn, removeBtn;
    ArrayList<IngrdientView> ingredients;
    ArrayList<String>  recipeNameResults;
    final ArrayList<String> ingredientsToCheckInDB = new ArrayList<String>();
    final int idInList = 0;
    IngredientsListAdapter ila;
    AutoCompleteTextView actv;

    @Override
    protected void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_fridge_recipe);
        ingsListView = (ListView) findViewById(R.id.lIngredientsListView);
        mainTitleTv = (TextView) findViewById(R.id.fridgeRecipeTv);
        endTileTv = (TextView) findViewById(R.id.recipeFindTv);
        actv = (AutoCompleteTextView)findViewById(R.id.autoCompleteTextView1);
        addingBtn = (Button) findViewById(R.id.ingAddBtn);
        searchBtn = (Button) findViewById(R.id.recFindBtn);
        removeBtn = (Button) findViewById(R.id.removeButton);
        ingredients = new ArrayList<IngrdientView>();
        recipeNameResults = new ArrayList<String>();
        ila = new IngredientsListAdapter(this, ingredients, ingsListView);
        ingsListView.setAdapter(ila);
        addingBtn.setOnClickListener(new View.OnClickListener() 
        {

            @Override
            public void onClick(View v) 
            {
                ila.clear();
                String ingredient = actv.getText().toString().toLowerCase();
                ingredientsToCheckInDB.add(ingredient);
                ingredients.add(new IngrdientView(ingredient, idInList));
                actv.setText("");
                ila.notifyDataSetChanged();
            }
        });


        searchBtn.setOnClickListener(new View.OnClickListener() 
        {


            @SuppressWarnings("unchecked")
            @Override
            public void onClick(View v) 
            {
                for(int i = 0 ; i <ingredientsToCheckInDB.size(); i++)
                {
                    Log.i("item:   !!!", ""+ingredientsToCheckInDB.get(i).toString());
                }
                Log.i("-----------", ""+ingredientsToCheckInDB.size());

                ParseQuery<ParseObject> _query = ParseQuery.getQuery("RecipesNewDb");

                _query.whereContains("IngredientsForSearch", "water");
                _query.findInBackground(new FindCallback<ParseObject>() 
                        {

                    @Override
                    public void done(List<ParseObject> objects, ParseException e) 
                    {
                        if(e==null)
                        {
                            for(int  i = 0 ; i <objects.size() ; i ++)
                            {
                                Log.i("objs ---->","->");//""+objects.get(i).toString());
                            }
                        }
                        else
                        {
                            Log.i("eeeeeeeeee", ""+e);
                        }

                    }
                        });
                //              _query.whereEqualTo("RecipeName", "Lemon Ice Cream");
                //              _query.getFirstInBackground(new GetCallback<ParseObject>() 
                //                      {
                //                  public void done(ParseObject object, ParseException e) 
                //                  {
                //                      if (object == null) {
                //                          Log.d("score", "The getFirst request failed.");
                //                      } else {
                //                          Log.d("score", "Retrieved the object.");
                //                          Log.i("value: ", ""+object.getString("RecipeName"));
                //                      }
                //                  }
                //                      });




                ParseQuery<ParseObject> query = ParseQuery.getQuery("RecipesNewDb");
                query.whereContainsAll("IngredientsForSearch",  ingredientsToCheckInDB);
                query.findInBackground(new FindCallback<ParseObject>() 
                        {

                    @Override
                    public void done(List<ParseObject> objects, ParseException e) 
                    {
                        Log.i("objects:  ", "" +objects.size());
                        // recipeNameResults.add(objects.toString());
                        //if (e == null)
                        //{
                        for (int i = 0; i < objects.size(); i++) 
                        {
                            recipeNameResults.add(objects.get(i).get("RecipeName").toString());
                            Log.i("name:  ",objects.get(i).get("RecipeName") + "");
                        }
                        //}
                        //else {
                        Log.i("e________", "" + e);
                        //}
                    }
                        });
            }
        });

    }

}

Answer 1

我遇到了与您类似的问题，我试图获取一个字符串数组，该数组在解析中保存并放入 TextView 中(我还将用户用户名保存在单独的键中)，这是一个解决方案:

**

1. 存储数组

   public class names extends ActionBarActivity {
      List<String> list = new ArrayList<String>();
   
   @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_names);
   
      //the button to store the array of strings
     mInterests.setOnClickListener(new View.OnClickListener() {
       @Override
       public void onClick(View v) {
          // the empty string is added because of the querying method   
          //  i used in getting back the array.
          list.add("");
   
            // to get the user username and store in a String
           ParseUser parseUser = ParseUser.getCurrentUser();
           String userName = parseUser.getUsername();
   
         //save the String array
           ParseObject parseObject= new ParseObject("Names");
            // Your list can contain more than the empty String
           parseObject.put("StringArray", list);
           parseObject.put("name", userName);
          parseObject.saveInBackground();
       }
     }
   

**

1. 从解析中获取字符串数组并放入 textView

         public class MainActivity extends ActionBarActivity {
     @Override
      protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_Activity);
         tvInterests = (TextView)findViewById(R.id.userInterests);
   
           ParseUser parseUser = ParseUser.getCurrentUser();
        currentuserUsername = parseUser.getUsername();
   
   
         List list1 = new ArrayList();
        list1.add("");
   
        ParseQuery<ParseObject> query = ParseQuery.getQuery("Names");
        query.whereEqualTo("name", currentuserUsername);
        query.whereContainedIn("StringArray", list1);
   
       query.getFirstInBackground(new GetCallback<ParseObject>() {
       @Override
       public void done(ParseObject parseObject, ParseException e) {
           if(e == null){
               if(parseObject != null){  JSONArray userInterest=parseObject.getJSONArray("StringArray");
   
                   try {
                       String[] resultingArray = userInterest.join(",").split(",");
                      // tvInterest.setText(Arrays.toString(resultingArray));
                       tvInterest.setText(Arrays.toString(resultingArray).replaceAll("\\[|\\]", ""));
                   } catch (JSONException e1) {
                       e1.printStackTrace();
                       AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                       builder.setMessage(e1.getMessage());
                       builder.setTitle("Error changing json array");
                       builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                           @Override
                           public void onClick(DialogInterface dialog, int which) {
                               // remove the alert dialog
                               dialog.dismiss();
   
                           }
                       });
                       AlertDialog dialog = builder.create();
                       dialog.show();
   
                   }
   
   
   
               }else {
                   // there was an error
               }
           }else{
               //there was an error
           }
       }
   });
      }
   }
   

   真诚地希望它能有所帮助。