/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package #package_name#;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.ListActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;
import #ManifestPackageName#.R;
public class #class_name# extends ListActivity implements OnClickListener
{
private final String SELECTED_ITEM_KEY = "selected_items";
public final String TEXT_KEY_1 = "title";
public final String TEXT_KEY_2 = "description";
public final String ITEM_ID = "id";
public final String IMG_KEY = "img";
public final String RADIO_KEY = "radio";
private Integer selectedItem = -1;
private RadioButton selectedRadio;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.#layout_name#single_selection_img/listviewsingle.xml#);
// list data
List<Map<String, Object>> resourceNames =
new ArrayList<Map<String, Object>>();
generateData(resourceNames);
MySingleAdapter notes = new MySingleAdapter(
this,
resourceNames,
R.layout.#layout_name#single_selection_img/listrowsingle.xml#,
new String[] { TEXT_KEY_1,TEXT_KEY_2, IMG_KEY, RADIO_KEY, ITEM_ID },
new int[] { R.id.text1, R.id.text2, R.id.img1, R.id.radio});
setListAdapter(notes);
}
/*
* Populate list
*/
private void generateData(List<Map<String, Object>> resourceNames)
{
//TODO here you will fill resourceNames with your own data
HashMap<String, Object> data;
int NUM_ITEMS = 50;
for (int i = 0; i <= NUM_ITEMS; i++)
{
data = new HashMap<String, Object>();
data.put(ITEM_ID, i);
data.put(TEXT_KEY_1, getString(R.string.list_item) + " " + Integer.toString(i));
data.put(TEXT_KEY_2, getString(R.string.description));
data.put(IMG_KEY, R.drawable.#drawable_name#single_selection_img/listiconsingle.png#);
data.put(RADIO_KEY, false);
resourceNames.add(data);
}
}
/*
* Prints on screen the currently selected item
*/
public void printMessage()
{
//TODO execute your action here
StringBuilder strText = new StringBuilder();
if(!selectedItem.equals(-1))
{
strText.append(getString(R.string.selected) + " ");
strText.append(selectedItem.toString());
}
else
{
strText.append(getString(R.string.noselection));
}
Toast.makeText(getApplicationContext(), strText.toString(),
Toast.LENGTH_SHORT).show();
}
public void onClick(View v) {
//handles list item click
RadioButton radio = (RadioButton) v.findViewById(R.id.radio);
boolean checked = radio.isChecked();
//updates selected list
if(checked)
{
selectedRadio = null;
selectedItem = -1;
}
else
{
if(!selectedItem.equals(-1))
{
selectedRadio.setChecked(false);
}
selectedItem = v.getId();
selectedRadio = radio;
}
//update check box value
radio.setChecked(!checked);
printMessage();
}
public void setSelectedRadio(RadioButton selectedRadio)
{
this.selectedRadio = selectedRadio;
}
/*
* Restores list selection
*/
@Override
protected void onRestoreInstanceState(Bundle state) {
super.onRestoreInstanceState(state);
selectedItem = state.getInt(SELECTED_ITEM_KEY, -1);
}
/* when the device is rotated, this activity is killed
* this method is called when activity is about to be shut down and saves
* the current list selection
*/
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt(SELECTED_ITEM_KEY, selectedItem);
}
public Integer getSelectedItem()
{
return selectedItem;
}
class MySingleAdapter extends SimpleAdapter
{
List<? extends Map<String, ?>> resourceNames;
#class_name# context;
String[] strKeys;
public MySingleAdapter(#class_name# context, List<? extends Map<String, ?>> data,
int resource, String[] from, int[] to) {
super(context, data, resource, from, to);
this.context = context;
resourceNames = data;
strKeys = from;
}
/* Return a view to be added on the list
* When we scroll the list, some items leave the screen becoming invisible to the user.
* Since creating views is an expensive task, we'd rather recycle these not visible views,
* that are referenced by convertView, updating its fields values.*/
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// used to improve performance, since we call findViewById
// only once for each created, but not recycled, view
ViewHolder holder;
//view to be recycled
if(convertView == null)
{
holder = new ViewHolder();
convertView = LayoutInflater.from(parent.getContext()).inflate(
R.layout.#layout_name#single_selection_img/listrowsingle.xml#, null);
holder.textView1 = (TextView) convertView.findViewById(R.id.text1);
holder.textView2 = (TextView) convertView.findViewById(R.id.text2);
holder.imgView = (ImageView) convertView.findViewById(R.id.img1);
holder.radioButton = (RadioButton) convertView.findViewById(R.id.radio);
convertView.setTag(holder);
}
else
{
holder = (ViewHolder) convertView.getTag();
}
Map<String, ?> currentData = resourceNames.get(position);
//updates list items values
holder.textView1.setText(currentData.get(context.TEXT_KEY_1).toString());
holder.textView2.setText(currentData.get(context.TEXT_KEY_2).toString());
holder.imgView.setImageResource((Integer) currentData.get(context.IMG_KEY));
holder.radioButton.setChecked(context.getSelectedItem().equals(
(Integer) currentData.get(context.ITEM_ID)));
if(holder.radioButton.isChecked())
{
context.setSelectedRadio(holder.radioButton);
}
convertView.setId((Integer) currentData.get(context.ITEM_ID));
convertView.setOnClickListener(context);
return convertView;
}
}
/*
* Holds references to list items
*/
class ViewHolder
{
TextView textView1, textView2;
ImageView imgView;
RadioButton radioButton;
}
}