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/*
* Copyright (C) 2011 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 com.example.android.apis.accessibility;
import com.example.android.apis.R;
import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.accessibility.AccessibilityEvent;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.ListView;
import android.widget.TextView;
/** Acts as a go-between for all AccessibilityEvents sent from items in the ListView, providing the
* option of sending more context to an AccessibilityService by adding more AccessiblityRecords to
* an event.
*/
public class TaskListView extends ListView {
public TaskListView(Context context, AttributeSet attributeSet) {
super(context, attributeSet);
}
/**
* This method will fire whenever a child event wants to send an AccessibilityEvent. As a
* result, it's a great place to add more AccessibilityRecords, if you want. In this case,
* the code is grabbing the position of the item in the list, and assuming that to be the
* priority for the task.
*/
@Override
public boolean onRequestSendAccessibilityEvent(View child, AccessibilityEvent event) {
// Add a record for ourselves as well.
AccessibilityEvent record = AccessibilityEvent.obtain();
super.onInitializeAccessibilityEvent(record);
int priority = (Integer) child.getTag();
String priorityStr = "Priority: " + priority;
record.setContentDescription(priorityStr);
event.appendRecord(record);
return true;
}
}
/** Adds Accessibility information to individual child views of rows in the list. */
final class TaskAdapter extends BaseAdapter{
private String[] mLabels = null;
private boolean[] mCheckboxes = null;
private Context mContext = null;
public TaskAdapter(Context context, String[] labels, boolean[] checkboxes) {
super();
mContext = context;
mLabels = labels;
mCheckboxes = checkboxes;
}
@Override
public int getCount() {
return mLabels.length;
}
/** Expands the views for individual list entries, and sets content descriptions for use by the
* TaskBackAccessibilityService.
*/
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView == null) {
LayoutInflater inflater = LayoutInflater.from(mContext);
convertView = inflater.inflate(R.layout.tasklist_row, parent, false);
}
CheckBox checkbox = (CheckBox) convertView.findViewById(R.id.tasklist_finished);
checkbox.setChecked(mCheckboxes[position]);
TextView label = (TextView)(convertView.findViewById(R.id.tasklist_label));
label.setText(mLabels[position]);
String contentDescription = new StringBuilder()
.append(mContext.getString(R.string.task_name))
.append(' ')
.append(mLabels[position]).toString();
label.setContentDescription(contentDescription);
convertView.setTag(position);
return convertView;
}
@Override
public Object getItem(int position) {
return mLabels[position];
}
@Override
public long getItemId(int position) {
return position;
}
}
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