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Wednesday, 3 April 2013

Implement custom ArrayAdapter to display icon on ListFragment

13:21
It's extended version of the exercise "ListFragment", to implement custom ArrayAdapter to display icon on ListFragment.

Implement custom ArrayAdapter to display icon on ListFragment

Create /res/layout/row.xml to define the layout of each row, add a ImageView to display icon.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:id="@+id/icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView
android:id="@+id/month"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>


Modify MyListFragment1.java to implement custom ListFragment, MyListFragment1. Override the getView() method to prepare and custom the view of each row. And setListAdapter with it.
package com.exercise.AndroidListFragment;

import android.app.ListFragment;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class MyListFragment1 extends ListFragment {

public class MyListAdapter extends ArrayAdapter<String> {

Context myContext;

public MyListAdapter(Context context, int textViewResourceId,
String[] objects) {
super(context, textViewResourceId, objects);
myContext = context;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
//return super.getView(position, convertView, parent);

LayoutInflater inflater =
(LayoutInflater)myContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View row=inflater.inflate(R.layout.row, parent, false);
TextView label=(TextView)row.findViewById(R.id.month);
label.setText(month[position]);
ImageView icon=(ImageView)row.findViewById(R.id.icon);

//Customize your icon here
icon.setImageResource(R.drawable.ic_launcher);

return row;
}

}

String[] month ={
"January",
"February",
"March",
"April",
"May",
"June",
"July",
"August",
"September",
"October",
"November",
"December"
};

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

/*
ListAdapter myListAdapter = new ArrayAdapter<String>(
getActivity(),
android.R.layout.simple_list_item_1,
month);
setListAdapter(myListAdapter);
*/
MyListAdapter myListAdapter =
new MyListAdapter(getActivity(), R.layout.row, month);
setListAdapter(myListAdapter);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.listfragment1, container, false);
}

@Override
public void onListItemClick(ListView l, View v, int position, long id) {
Toast.makeText(
getActivity(),
getListView().getItemAtPosition(position).toString(),
Toast.LENGTH_LONG).show();
}

}



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