Friday 27 May 2011


The simple android custom listview can assist only a single string, where its not possible to use them on all application. This leads to create custom list view example tutorial .
Step 1:
Add a normal listview in the main.xml layout and make sure u set the layout width as fill parent.
Main.xml
[sourcecode language="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">
<TextView android:id="@+id/TextView01" android:layout_height="wrap_content" android:text="List of Country &amp; their denotation" android:textStyle="normal|bold" android:gravity="center_vertical|center_horizontal" android:layout_width="fill_parent"></TextView>
<ListView android:id="@+id/ListView01" android:layout_height="wrap_content"
android:layout_width="fill_parent">
</ListView>
</LinearLayout>
[/sourcecode]
Step 2 :
Add two textview(textview1&textview2) in listview.xml and add background image(bg.png) to textview1.
Listview.xml
[sourcecode language="xml"]
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content" android:gravity="left|center"
android:layout_width="wrap_content" android:paddingBottom="5px"
android:paddingTop="5px" android:paddingLeft="5px">
<TextView android:id="@+id/TextView01" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:gravity="center"
android:background="@drawable/bg" android:textColor="#FFFF00"
android:text="hi"></TextView>
<TextView android:text="@+id/TextView02" android:id="@+id/TextView02"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:layout_marginLeft="10px" android:textColor="#0099CC"></TextView>
</LinearLayout>
[/sourcecode]
Step 3 :
The class EfficientAdapter should extend BaseAdapter for basic listview.
Step 4:
Create a class Holder that contains two textview.
Step 5:
Create two separate variables for country list and denotation.
Step 6:
Set the content view to main and set the set the listview adapter to EfficientAdapter class.
This will load the listcontent in the listview.
[sourcecode language="java"]
import android.app.Activity;
import android.os.Bundle;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class customlistview extends Activity {
private static class EfficientAdapter extends BaseAdapter {
private LayoutInflater mInflater;
public EfficientAdapter(Context context) {
mInflater = LayoutInflater.from(context);
}
public int getCount() {
return country.length;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.listview, null);
holder = new ViewHolder();
holder.text = (TextView) convertView
.findViewById(R.id.TextView01);
holder.text2 = (TextView) convertView
.findViewById(R.id.TextView02);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.text.setText(curr[position]);
holder.text2.setText(country[position]);
return convertView;
}
static class ViewHolder {
TextView text;
TextView text2;
}
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ListView l1 = (ListView) findViewById(R.id.ListView01);
l1.setAdapter(new EfficientAdapter(this));
}
private static final String[] country = { "Iceland", "India", "Indonesia",
"Iran", "Iraq", "Ireland", "Israel", "Italy", "Laos", "Latvia",
"Lebanon", "Lesotho ", "Liberia", "Libya", "Lithuania",
"Luxembourg" };
private static final String[] curr = { "ISK", "INR", "IDR", "IRR", "IQD",
"EUR", "ILS", "EUR", "LAK", "LVL", "LBP", "LSL ", "LRD", "LYD",
"LTL ", "EUR"
};
}

[caption id="attachment_1195" align="alignnone" width="480" caption="custom list view in landscape"]