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/*
* Copyright (C) 2013 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.expandingcells;
import android.app.Activity;
import android.os.Bundle;
import java.util.ArrayList;
import java.util.List;
/**
* This activity creates a listview whose items can be clicked to expand and show
* additional content.
*
* In this specific demo, each item in a listview displays an image and a corresponding
* title. These two items are centered in the default (collapsed) state of the listview's
* item. When the item is clicked, it expands to display text of some varying length.
* The item persists in this expanded state (even if the user scrolls away and then scrolls
* back to the same location) until it is clicked again, at which point the cell collapses
* back to its default state.
*/
public class ExpandingCells extends Activity {
private final int CELL_DEFAULT_HEIGHT = 200;
private final int NUM_OF_CELLS = 30;
private ExpandingListView mListView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ExpandableListItem[] values = new ExpandableListItem[] {
new ExpandableListItem("Chameleon", R.drawable.chameleon, CELL_DEFAULT_HEIGHT,
getResources().getString(R.string.short_lorem_ipsum)),
new ExpandableListItem("Rock", R.drawable.rock, CELL_DEFAULT_HEIGHT,
getResources().getString(R.string.medium_lorem_ipsum)),
new ExpandableListItem("Flower", R.drawable.flower, CELL_DEFAULT_HEIGHT,
getResources().getString(R.string.long_lorem_ipsum)),
};
List<ExpandableListItem> mData = new ArrayList<ExpandableListItem>();
for (int i = 0; i < NUM_OF_CELLS; i++) {
ExpandableListItem obj = values[i % values.length];
mData.add(new ExpandableListItem(obj.getTitle(), obj.getImgResource(),
obj.getCollapsedHeight(), obj.getText()));
}
CustomArrayAdapter adapter = new CustomArrayAdapter(this, R.layout.list_view_item, mData);
mListView = (ExpandingListView)findViewById(R.id.main_list_view);
mListView.setAdapter(adapter);
mListView.setDivider(null);
}
}
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