| /* |
| * Copyright (C) 2007 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.view; |
| |
| import android.app.ExpandableListActivity; |
| import android.os.Bundle; |
| import android.view.ContextMenu; |
| import android.view.Gravity; |
| import android.view.MenuItem; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.view.ContextMenu.ContextMenuInfo; |
| import android.widget.AbsListView; |
| import android.widget.BaseExpandableListAdapter; |
| import android.widget.ExpandableListAdapter; |
| import android.widget.ExpandableListView; |
| import android.widget.TextView; |
| import android.widget.Toast; |
| import android.widget.ExpandableListView.ExpandableListContextMenuInfo; |
| |
| import com.example.android.apis.R; |
| |
| /** |
| * Demonstrates expandable lists using a custom {@link ExpandableListAdapter} |
| * from {@link BaseExpandableListAdapter}. |
| */ |
| public class ExpandableList1 extends ExpandableListActivity { |
| |
| ExpandableListAdapter mAdapter; |
| |
| @Override |
| public void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| |
| // Set up our adapter |
| mAdapter = new MyExpandableListAdapter(); |
| setListAdapter(mAdapter); |
| registerForContextMenu(getExpandableListView()); |
| } |
| |
| @Override |
| public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { |
| menu.setHeaderTitle("Sample menu"); |
| menu.add(0, 0, 0, R.string.expandable_list_sample_action); |
| } |
| |
| @Override |
| public boolean onContextItemSelected(MenuItem item) { |
| ExpandableListContextMenuInfo info = (ExpandableListContextMenuInfo) item.getMenuInfo(); |
| |
| String title = ((TextView) info.targetView).getText().toString(); |
| |
| int type = ExpandableListView.getPackedPositionType(info.packedPosition); |
| if (type == ExpandableListView.PACKED_POSITION_TYPE_CHILD) { |
| int groupPos = ExpandableListView.getPackedPositionGroup(info.packedPosition); |
| int childPos = ExpandableListView.getPackedPositionChild(info.packedPosition); |
| Toast.makeText(this, title + ": Child " + childPos + " clicked in group " + groupPos, |
| Toast.LENGTH_SHORT).show(); |
| return true; |
| } else if (type == ExpandableListView.PACKED_POSITION_TYPE_GROUP) { |
| int groupPos = ExpandableListView.getPackedPositionGroup(info.packedPosition); |
| Toast.makeText(this, title + ": Group " + groupPos + " clicked", Toast.LENGTH_SHORT).show(); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /** |
| * A simple adapter which maintains an ArrayList of photo resource Ids. |
| * Each photo is displayed as an image. This adapter supports clearing the |
| * list of photos and adding a new photo. |
| * |
| */ |
| public class MyExpandableListAdapter extends BaseExpandableListAdapter { |
| // Sample data set. children[i] contains the children (String[]) for groups[i]. |
| private String[] groups = { "People Names", "Dog Names", "Cat Names", "Fish Names" }; |
| private String[][] children = { |
| { "Arnold", "Barry", "Chuck", "David" }, |
| { "Ace", "Bandit", "Cha-Cha", "Deuce" }, |
| { "Fluffy", "Snuggles" }, |
| { "Goldy", "Bubbles" } |
| }; |
| |
| public Object getChild(int groupPosition, int childPosition) { |
| return children[groupPosition][childPosition]; |
| } |
| |
| public long getChildId(int groupPosition, int childPosition) { |
| return childPosition; |
| } |
| |
| public int getChildrenCount(int groupPosition) { |
| return children[groupPosition].length; |
| } |
| |
| public TextView getGenericView() { |
| // Layout parameters for the ExpandableListView |
| AbsListView.LayoutParams lp = new AbsListView.LayoutParams( |
| ViewGroup.LayoutParams.MATCH_PARENT, 64); |
| |
| TextView textView = new TextView(ExpandableList1.this); |
| textView.setLayoutParams(lp); |
| // Center the text vertically |
| textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT); |
| // Set the text starting position |
| textView.setPaddingRelative(36, 0, 0, 0); |
| // Set the text alignment |
| textView.setTextAlignment(View.TEXT_ALIGNMENT_VIEW_START); |
| return textView; |
| } |
| |
| public View getChildView(int groupPosition, int childPosition, boolean isLastChild, |
| View convertView, ViewGroup parent) { |
| TextView textView = getGenericView(); |
| textView.setText(getChild(groupPosition, childPosition).toString()); |
| return textView; |
| } |
| |
| public Object getGroup(int groupPosition) { |
| return groups[groupPosition]; |
| } |
| |
| public int getGroupCount() { |
| return groups.length; |
| } |
| |
| public long getGroupId(int groupPosition) { |
| return groupPosition; |
| } |
| |
| public View getGroupView(int groupPosition, boolean isExpanded, View convertView, |
| ViewGroup parent) { |
| TextView textView = getGenericView(); |
| textView.setText(getGroup(groupPosition).toString()); |
| return textView; |
| } |
| |
| public boolean isChildSelectable(int groupPosition, int childPosition) { |
| return true; |
| } |
| |
| public boolean hasStableIds() { |
| return true; |
| } |
| |
| } |
| } |