Advanced Adapter in Android with Example

 Advanced Adapter in Android with Example

Here is source code of the Program to create an Adapter in an Application. The program is successfully compiled and run on a Windows system using Eclipse Ide. The program output is also shown below.

1. MainActivity.java:

import android.os.Bundle;

import android.app.Activity;

import android.app.ListActivity;

import android.view.Menu;

 

public class MainActivity extends ListActivity {

 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        // TODO Auto-generated method stub

        super.onCreate(savedInstanceState);

        String str[] = new String[] {"C","C++","Java","Andorid"};

                AdvancedAdapter adapter = new AdvancedAdapter(this, str);

                setListAdapter(adapter);

    }

}

2. AdvancedAdapter: 

 

import java.util.zip.Inflater;

 

import android.app.Activity;

import android.content.Context;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ArrayAdapter;

import android.widget.ImageView;

import android.widget.TextView;

 

public class AdvancedAdapter extends ArrayAdapter<String> {

 

    private final Context context;

    private final String[] lang;

 

    public AdvancedAdapter(Context context, String lang[]) {

        super(context, R.layout.rowlayout, lang);

        // TODO Auto-generated constructor stub

        this.context = context;

        this.lang = lang;

    }

 

    static class Holder {

        public TextView text;

        public ImageView img;

        }

 

        @Override

         public View getView(int position, View convertView, ViewGroup parent) {

               // TODO Auto-generated method stub

               View row;

                 if (convertView == null) {

                        LayoutInflater li = (LayoutInflater) context

                                         .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

                        row = li.inflate(R.layout.rowlayout, parent, false);

                        Holder holder = new Holder();

                        holder.text = (TextView) row.findViewById(R.id.label);

                        holder.img = (ImageView) row.findViewById(R.id.icon);

                        row.setTag(holder);

                  } else {

                     row = convertView;

        }

 

        Holder holder = (Holder) row.getTag();

                String str = lang[position];

                holder.text.setText(str);

 

        if (str.startsWith("C")) {

                     holder.img.setImageResource(R.drawable.c_pic);

        } else if (str.startsWith("Java")) {

                     holder.img.setImageResource(R.drawable.java);

        } else if (str.startsWith("Android")) {

                     holder.img.setImageResource(R.drawable.ic_launcher);

        } else {

            // c++

                    holder.img.setImageResource(R.drawable.c_prog);

        }

 

        return row;

    }

 

}

3. RowLayout.xml:

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content" >

 

    <ImageView

        android:id="@+id/icon"

        android:layout_width="100px"

        android:layout_height="100px"

        android:layout_marginLeft="4px"

        android:layout_marginRight="10px"

        android:layout_marginTop="4px"

        android:src="@drawable/ic_launcher" >

    </ImageView>

 

    <TextView

        android:id="@+id/label"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@+id/label"

        android:textSize="80px" >

        <extView>

 

</LinearLayout>