Android List View ( using EfficientAdapter)

In java file


package ListView.app;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class my_listview extends Activity {
ListView itemList = null;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.listview2);
// TODO Auto-generated method stub
itemList = (ListView) findViewById(R.id.itemList);
itemList.setAdapter(new EfficientAdapter(this));
}

String[] Qitems = {"Q1", "Q2", "Q3", "Q4", "Q5", "Q6", "Q7", "Q8", "Q9", "Q10", "Q11", "Q12", "Q13", "Q14", "Q15"};

String[] Aitems = { "Ans1", "Ans2", "Ans3", "Ans4", "Ans5", "Ans6", "Ans7", "Ans8", "Ans9", "Ans10", "Ans11", "Ans12", "Ans13", "Ans14", "Ans15" };

public class EfficientAdapter extends BaseAdapter {
private LayoutInflater mInflater;
public Context ctxt;

public EfficientAdapter(Context context) {
mInflater = LayoutInflater.from(context);
this.ctxt = context;
}

public int getCount() {
return Qitems.length;
}

public Object getItem(int position) {
return position;
}

public long getItemId(int position) {
return position;
}


public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;

if (convertView == null) {
convertView = mInflater.inflate(R.layout.custom_listview, null);
holder = new ViewHolder();
holder.titletxt = (TextView) convertView.findViewById(R.id.titletxt);
holder.ratingtxt = (TextView) convertView.findViewById(R.id.ratingtxt);

convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.ratingtxt.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), Aitems[position],Toast.LENGTH_LONG).show();
}
});

holder.titletxt.setText(Qitems[position]);
holder.ratingtxt.setText("Answer");

return convertView;
}

class ViewHolder {
TextView titletxt;
TextView ratingtxt;

}
}
}

In first xml file (.xml)

custom_listview.xml

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

<LinearLayout

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

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent">

<RelativeLayout

android:id="@+id/RelativeLayout1"

android:layout_height="wrap_content"

android:layout_width="wrap_content">

<TextView

android:id="@+id/titletxt"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginLeft="10px"

android:textColor="#ffffff"

android:textSize="18sp"

android:text="fasdsadsad"

android:textStyle="bold">

</TextView>

<TextView

android:id="@+id/ratingtxt"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginLeft="10px"

android:textColor="#ffffff"

android:text="123"

android:layout_below="@+id/titletxt"

android:textSize="10sp">

</TextView>

</RelativeLayout>

</LinearLayout>

In second xml file (.xml)

listview2

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

<RelativeLayout

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

android:layout_width="fill_parent"

android:layout_height="fill_parent">

<ImageView

android:id="@+id/ImageView1"

android:layout_width="fill_parent"

android:layout_height="100dp"

android:background="@drawable/icon">

</ImageView>

<ListView

android:layout_below="@+id/ImageView1"

android:id="@+id/itemList"

android:layout_height="fill_parent"

android:layout_width="wrap_content"

android:background="#20000000">

</ListView>

</RelativeLayout>

Note :- Question and Answers in String Qitem and Aitems are just for example.

Source Code