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本文实例讲述了Android基于BaseExpandableListAdapter实现的二级列表仿通话记录功能。分享给大家供大家参考，具体如下：
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android SDK中带有这样类似的例子，但是那个还是静态数据，没有实际应用价值，参考意义不大。
网上找了很多，还是那样的情况，几乎是同一篇文章，大家转来转去。况且，那篇例子也是静态的数据。
还是自己试试，自己写一个吧。程序读取手机系统的通话记录，按联系人分组，显示到列表。
开发工具：eclipse
运行环境：htc G9 android2.3.3
不多说，先看效果：
展开后的效果：
继续展开的效果：
main.xml：
<?xml version="1.0" encoding="utf-8"?>
lis_item.xml：
<?xml version="1.0" encoding="utf-8"?>
这里的也是采用继承BaseExpandableListAdapter来实现，具体请看代码。
主角Activity：
public class CollLogActivity extends Activity {
private ExpandableListView listView;
private MyAsyncQueryHandler queryHandler;
private MyExpandableListAdapter listAdapter;
private ArrayList group;
private ArrayList> child;
private static final Uri uri = Uri.parse("content://call_log/calls");
private static final String[] projection = { "_id", "number", "date",
"type", "new", "name" };
private static final int INCOMING_TYPE = 1;
private static final int OUTGOING_TYPE = 2;
private static final int MISSED_TYPE = 3;
private String currentNumber = "-1";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
listView = (ExpandableListView) findViewById(R.id.list);
queryHandler = new MyAsyncQueryHandler(getContentResolver());
group = new ArrayList();
child = new ArrayList>();
}
@Override
protected void onResume() {
super.onResume();
startQuery();
}
private class MyExpandableListAdapter extends BaseExpandableListAdapter {
private LayoutInflater inflater;
public MyExpandableListAdapter(Context context) {
this.inflater = LayoutInflater.from(context);
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return child.get(groupPosition).get(childPosition);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = inflater.inflate(R.layout.list_item, null);
holder = new ViewHolder();
holder.name = (TextView) convertView.findViewById(R.id.name);
holder.number = (TextView) convertView
.findViewById(R.id.number);
holder.date = (TextView) convertView.findViewById(R.id.date);
holder.count = (TextView) convertView.findViewById(R.id.count);
holder.type = (ImageView) convertView.findViewById(R.id.type);
holder.open = (ImageView) convertView.findViewById(R.id.open);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
convertView.setBackgroundColor(Color.rgb(54, 54, 54));
ContentValues cv = child.get(groupPosition).get(childPosition);
String name = cv.getAsString("name");
String number = cv.getAsString("number");
String date = cv.getAsString("date");
int type = cv.getAsInteger("type");
holder.name.setText(name);
holder.number.setText(number);
holder.date.setText(date);
holder.count.setVisibility(View.GONE);
setTypeImg(holder.type, type);
holder.open.setVisibility(View.GONE);
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return child.get(groupPosition).size();
}
@Override
public Object getGroup(int groupPosition) {
return group.get(groupPosition);
}
@Override
public int getGroupCount() {
return group.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = inflater.inflate(R.layout.list_item, null);
holder = new ViewHolder();
holder.name = (TextView) convertView.findViewById(R.id.name);
holder.number = (TextView) convertView
.findViewById(R.id.number);
holder.date = (TextView) convertView.findViewById(R.id.date);
holder.count = (TextView) convertView.findViewById(R.id.count);
holder.type = (ImageView) convertView.findViewById(R.id.type);
holder.open = (ImageView) convertView.findViewById(R.id.open);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
ContentValues cv = (ContentValues) getGroup(groupPosition);
String name = cv.getAsString("name");
String number = cv.getAsString("number");
String date = cv.getAsString("date");
holder.name.setText(name);
holder.number.setText(number);
holder.date.setText(date);
holder.type.setVisibility(View.GONE);
holder.count.setText("(" + getChildrenCount(groupPosition) + ")");
if (isExpanded) {
holder.open.setImageResource(R.drawable.min);
} else {
holder.open.setImageResource(R.drawable.max);
}
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
private class ViewHolder {
TextView name;
TextView number;
TextView date;
TextView count;
ImageView type;
ImageView open;
}
private void setTypeImg(ImageView imageView, int type) {
switch (type) {
case INCOMING_TYPE:
imageView.setImageResource(R.drawable.call_in);
break;
case OUTGOING_TYPE:
imageView.setImageResource(R.drawable.call_out);
break;
case MISSED_TYPE:
imageView.setImageResource(R.drawable.call_miss);
break;
}
}
private class MyAsyncQueryHandler extends AsyncQueryHandler {
public MyAsyncQueryHandler(ContentResolver cr) {
super(cr);
}
@Override
protected void onQueryComplete(int token, Object cookie, Cursor cursor) {
if (cursor != null && cursor.getCount() > 0) {
cursor.moveToFirst();
for (int i = 0; i < cursor.getCount(); i++) {
cursor.moveToPosition(i);
String name = cursor.getString(cursor
.getColumnIndex("name"));
String number = cursor.getString(cursor
.getColumnIndex("number"));
int type = cursor.getInt(cursor.getColumnIndex("type"));
long date = cursor.getLong(cursor.getColumnIndex("date"));
ContentValues cv = new ContentValues();
cv.put("name", name);
cv.put("number", number);
cv.put("type", type);
cv.put("date",
formatTimeStampString(CollLogActivity.this, date));
addGroupItem(cv);
}
}
if (group.size() > 0) {
setAdapter();
}
}
}
private void addGroupItem(ContentValues cv) {
String number = cv.getAsString("number");
if (!currentNumber.equals(number)) {
group.add(cv);
addChildItem(number);
currentNumber = number;
}
}
private void addChildItem(String number) {
ArrayList list = new ArrayList();
Cursor cursor = getContentResolver().query(uri, projection,
"number=" + number, null, null);
if (cursor != null && cursor.getCount() > 0) {
cursor.moveToFirst();
for (int i = 0; i < cursor.getCount(); i++) {
cursor.moveToPosition(i);
String name = cursor.getString(cursor.getColumnIndex("name"));
int type = cursor.getInt(cursor.getColumnIndex("type"));
long date = cursor.getLong(cursor.getColumnIndex("date"));
ContentValues cv = new ContentValues();
cv.put("name", name);
cv.put("number", number);
cv.put("type", type);
cv.put("date",
formatTimeStampString(CollLogActivity.this, date));
list.add(cv);
}
}
child.add(list);
}
private void setAdapter() {
listAdapter = new MyExpandableListAdapter(CollLogActivity.this);
listView.setAdapter(listAdapter);
}
private void startQuery() {
queryHandler.startQuery(1, null, uri, projection, null, null,
"date desc");
}
// 处理日期方法
private static String formatTimeStampString(Context context, long when) {
Time then = new Time();
then.set(when);
Time now = new Time();
now.setToNow();
int format_flags = DateUtils.FORMAT_NO_NOON_MIDNIGHT
| DateUtils.FORMAT_ABBREV_ALL | DateUtils.FORMAT_CAP_AMPM;
if (then.year != now.year) {
format_flags |= DateUtils.FORMAT_SHOW_YEAR
| DateUtils.FORMAT_SHOW_DATE;
} else if (then.yearDay != now.yearDay) {
format_flags |= DateUtils.FORMAT_SHOW_DATE;
} else {
format_flags |= DateUtils.FORMAT_SHOW_TIME;
}
return DateUtils.formatDateTime(context, when, format_flags);
}
}
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