Parse.com onListItemClick詳細情報が表示されません

Question

私はこのコードを試しています。私はParse.comを使用してレストラン名を取得し、listViewに配置しています。 名前の1つをクリックすると、詳細ページに移動し、レストランに関する詳細情報を取得できます。 問題は、ListViewの名前をクリックすると詳細ページに移動しますが、何も表示されません。 私はアンドロイドの新機能であり、どのように動作するべきかを完全に理解していません。ここ

は、レストランの名前を表示すると仮定し、私のmainActivity

public class MainActivity extends Activity { 


private CustomAdapter urgentTodosAdapter; 
private ParseQueryAdapter<ParseObject> mainAdapter; 
private ListView listView; 
List<ParseObject> Name =new ArrayList<ParseObject>(); 

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

    mainAdapter = new ParseQueryAdapter<ParseObject>(this,"RestaurantDetail"); 
    urgentTodosAdapter = new CustomAdapter(this); 
    listView = (ListView) findViewById(R.id.listView1); 

    listView.setAdapter(urgentTodosAdapter); 
    urgentTodosAdapter.loadObjects(); 

// Binds the Adapter to the ListView 
listView.setAdapter(urgentTodosAdapter); 
// Capture button clicks on ListView items 
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
    @Override 
    public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { 

     // Send single item click data to SingleItemView Class 
     Intent random1 = new Intent(MainActivity.this, SingleItemView.class); 
     if (Name.size() > i) 

      // Pass data "name" followed by the position 
      random1.putExtra("Name", Name.get(i).getString("Name")); 

     // Open SingleItemView.java Activity 
     startActivity(random1); 

    } 
}); 
} 
} 

のコードと私のcustomAdapterクラス

public class CustomAdapter extends ParseQueryAdapter<ParseObject> { 

public CustomAdapter(Context context) { 

    super(context, new ParseQueryAdapter.QueryFactory<ParseObject>() { 

     public ParseQuery create() { 
      ParseQuery query = new ParseQuery("RestaurantDetail"); 

    /* query.whereEqualTo("Name", true);*/ 

      return query; 
     } 

    }); 

} 

@Override 
public View getItemView(ParseObject object, View v, ViewGroup parent) { 
    if (v == null) { 

     v = View.inflate(getContext(), R.layout.activity_main, null); 
    } 
    super.getItemView(object, v, parent); 

    ParseImageView todoImage = (ParseImageView) v.findViewById(R.id.icon); 
    ParseFile imageFile = object.getParseFile("Logo"); 
    if (imageFile != null) { 
     todoImage.setParseFile(imageFile); 
     todoImage.loadInBackground(); 
    } 

    TextView titleTextView = (TextView) v.findViewById(R.id.textView3); 
    titleTextView.setText(object.getString("Name")); 
    return v; 
} 
} 

とクラスであるなど

@ParseClassName("RestaurantDetail") 
public class SingleItemView extends Activity { 

// Declare Variables 
protected TextView txtname; 
String Name; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    // Get the view from SingleItemView.xml 
    setContentView(R.layout.single_item_view); 

    txtname = (TextView) findViewById(R.id.name); 

    // Retrieve data from MainActivity on item click event 
    Intent random1 = getIntent(); 
    // Get the name 
    Name = random1.getStringExtra("Name"); 

    // Locate the TextView in singleitemview.xml 

    // Load the text into the TextView 
    txtname.setText(Name); 

} 
} 

Answer 1

いくつかの文脈を得るためにOPのコメントセクションの私のコメントを見てください：

回答：

MainActivityでは、アダプタに追加するクエリを作成しませんでした。あなたのパースクラスを初期化し

public class CustomAdapter extends ArrayAdapter<RestaurantDetail> { 
private final Context mContext; 
private List<RestaurantDetail> restrauants; 

public CustomAdapter(Context context, List<RestaurantDetail> objects) { 
    super(context, R.layout.include_restaurants, objects); 
    this.mContext = context; 
    this.restrauants = objects; 
} 


public View getView(final int position, View convertView, final ViewGroup parent) { 
    if (convertView == null) { 
     LayoutInflater mLayoutInflater = LayoutInflater.from(mContext); 
     v = mLayoutInflater.inflate(R.layout.include_restaurants, null); 
    } 

    ParseImageView todoImage = (ParseImageView) v.findViewById(R.id.icon); 
    ParseFile imageFile = object.getParseFile("Logo"); 
    if (imageFile != null) { 
     todoImage.setParseFile(imageFile); 
     todoImage.loadInBackground(); 
    } 

    TextView titleTextView = (TextView) v.findViewById(R.id.textView3); 
    titleTextView.setText(object.getString("Name")); 

    //this is also where you can handle to onClick stuff 

    cardView.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 


     } 
    }); 


    return v; 
} 
} 

：あなたのゲッターを置くことができる場所でもある/以下を見て、自分のニーズにParseQueryを調整します

MainActivityクラス

public class MainActivity extends Activity { 


private CustomAdapter urgentTodosAdapter; 
private ParseQueryAdapter<ParseObject> mainAdapter; 
private ListView listView; 
List<ParseObject> Name =new ArrayList<ParseObject>(); 

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

    listView = (ListView) findViewById(R.id.listView1); 

    //I'm not sure how you initialized your custom adapter - i'll show you how i did it, but yours might work too 
    urgentTodosAdapter = new urgentTodosAdapter(MainActivity.this, new ArrayList<RestaurantDetail>()); 

    listView.setAdapter(urgentTodosAdapter); 

    //Here is where you forgot to add your ParseQuery for 'Restaurants' 

    ParseQuery<RestaurantDetail> query = ParseQuery.getQuery(RestaurantDetail.class); 
    query.findInBackground(new FindCallback<RestaurantDetail>() { 
     public void done(List<RestaurantDetail> resutarantList, ParseException e) { 
      if (e == null) { 

       if (resutarantList.size() > 0) { 
        for (int i = 0; i < resutarantList.size(); i++) { 
         //you forgot to do this - didn't add anything for the adapter to show. 
         urgentTodosAdapter.add(resutarantList.get(i)); 

        } 

       } else { 

        // do something if empty 

       } 
      } else { 

       // do something if null 
      } 
     } 
    }); 

    //This is fine here, but you can also do the same in your adapter class; I'll keep this here and show you where to put it 
    //in the adapter as well. 

    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
     @Override 
     public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { 

      // Send single item click data to SingleItemView Class 
      Intent random1 = new Intent(MainActivity.this, SingleItemView.class); 
      if (Name.size() > i) 

       // Pass data "name" followed by the position 
       random1.putExtra("Name", Name.get(i).getString("Name")); 

      // Open SingleItemView.java Activity 
      startActivity(random1); 

     } 
    }); 
} 
} 

CustomAdapterクラスセッター。

@ParseClassName("YourClassNameInYourDBHere") 
public class ResuaurantDetail(your class here) extends ParseObject 
{ 

}