Hi guys,
Here is a sample activity that shows how to create a list of checkboxes:
import android.app.ListActivity;
import android.os.Bundle;
import android.widget.ListView;
import android.widget.ArrayAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.AdapterView;
import android.content.Context;
import android.util.SparseBooleanArray;
import android.view.View;
import android.view.ViewGroup;
/**
* This example shows how to create a list of checkboxes.
*/
public class List10 extends ListActivity implements
AdapterView.OnItemClickListener {
private CheckBoxAdapter mCheckBoxAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mCheckBoxAdapter = new CheckBoxAdapter(this,
R.layout.list_item_checkbox, GENRES);
setListAdapter(mCheckBoxAdapter);
final ListView listView = getListView();
listView.setItemsCanFocus(false);
listView.setTextFilterEnabled(true);
listView.setOnItemClickListener(this);
}
public void onItemClick(AdapterView parent, View view, int
position, long id) {
mCheckBoxAdapter.toggle(position);
}
private static class CheckBoxAdapter extends ArrayAdapter<String>
implements CompoundButton.OnCheckedChangeListener {
private SparseBooleanArray mCheckStates;
public CheckBoxAdapter(Context context, int resource, String[]
objects) {
super(context, resource, objects);
mCheckStates = new SparseBooleanArray(objects.length);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final CheckBox view = (CheckBox) super.getView(position,
convertView, parent);
view.setTag(position);
view.setChecked(mCheckStates.get(position, false));
view.setOnCheckedChangeListener(this);
return view;
}
public boolean isChecked(int position) {
return mCheckStates.get(position, false);
}
public void setChecked(int position, boolean isChecked) {
mCheckStates.put(position, isChecked);
notifyDataSetChanged();
}
public void toggle(int position) {
setChecked(position, !isChecked(position));
}
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
mCheckStates.put((Integer) buttonView.getTag(), isChecked);
}
}
private static final String[] GENRES = new String[] {
"Action", "Adventure", "Animation", "Children", "Comedy",
"Documentary", "Drama",
"Foreign", "History", "Independent", "Romance", "Sci-Fi",
"Television", "Thriller"
};
}
And the XML file for the checkboxes:
<?xml version="1.0" encoding="utf-8"?>
<CheckBox xmlns:android="http://schemas.android.com/apk/res/android";
android:id="@android:id/text1"
android:layout_width="fill_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:textAppearance="?android:attr/textAppearanceLarge"
/>
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