/* * 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.view.ViewGroup.MarginLayoutParams;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.FILL_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.setPadding(36, 0, 0, 0);            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;        }    }}