CODEWITHSUNDEEP
androidlistviewcustom-adapter
MindDrip
MindDrip

Reputation: 201

Android Listview & CustomAdapter getView Issues

Currently working to develop a custom adapater, to display data on a list row as follows:

|TextView| |TextView| |TextView| |TextView|

Currently I am using this tutorial for reference.

http://www.ezzylearning.com/tutorial.aspx?tid=1763429

However, as mentioned, I encounter a problem with the customeradapter, specifically when creating an inflator and in also identifying the ID for Textview in the custom row xml.

Here are the two lines that throw up errors:

LayoutInflater inflater = ((Activity)context).getLayoutInflater();

&

holder.food = (TextView)row.findViewById(R.id.foodName);

Errors given are: LayoutInflater cannot be resolved to a type & R cannot be resolved to a variable.

Many thanks for any suggestions.

Imports

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;
import android.view.LayoutInflater;

My full implementation for the adapter:

public class CustomBaseAdapter extends ArrayAdapter<ReportSummary>{

    private Context             context; 
    private int                 layoutResourceId;    
    private List<ReportSummary> report = new ArrayList<ReportSummary>();

    public CustomBaseAdapter(Context context, int layoutResourceId, List<ReportSummary> report) {
        super(context, layoutResourceId, report);
        this.layoutResourceId = layoutResourceId;
        this.context = context;
        this.report = report;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View        row     = convertView;
        ViewHolder  holder  = null;

        if(row == null)
        {
            LayoutInflater inflater = ((Activity)context).getLayoutInflater();
            row = inflater.inflate(layoutResourceId, parent, false);

            holder = new ViewHolder();

            holder.food = (TextView)row.findViewById(R.id.foodName);

            row.setTag(holder);
        }
        else
        {
            holder = (ViewHolder)row.getTag();
        }

        holder.food.setText(report.get(0).getFoodName());
        holder.status.setText(report.get(0).getStatus());
        //holder.foodRDA.setText(report.get(0).getStatus());
        holder.userLvl.setText(report.get(0).getLevel());

        return row;
    }

    class ViewHolder  {
        TextView food;
        TextView status;
        TextView userLvl;
        TextView foodRDA;
        TextView difference;
    }
}

XML layouts

activity_diet_analysis

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".DietAnalysisActivity" >


    <ListView
        android:id="@+id/list"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content">
    </ListView>

</RelativeLayout>

row_diet_analysis

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >


 <TextView android:id="@+id/foodName"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="top"
    android:text="TTTT"
    />
 <TextView android:id="@+id/status"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/foodName"
    android:text="TJJDFDFDF"
    />
 <TextView android:id="@+id/foodRDA"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/status"
    android:text="TTTT"
    />
 <TextView android:id="@+id/userLvl"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/foodRDA"
    android:text="TTTT"
    />
 <TextView android:id="@+id/difference"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/userLvl"
    android:text="TTTT"
    />

</RelativeLayout>

Upvotes: 0

Views: 1831

Answers (1)

Tspoon
Tspoon

Reputation: 3800

Based on the errors you mentioned, you probably need to import LayoutInflator:

import android.view.LayoutInflater;

And import the generated R file for your app:

import com.example.app.R

Be sure you import the correct R file too, not android.R.

Also, if you're using an IDE such as Eclipse or Android Studio (which you probably should be), it will do this for you automatically.

Note that the R file will not be generated for your project if you have any errors in your resources files.

Upvotes: 1

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