加载ConversationListActivity以及延迟的使用
2013-07-17 13:45
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1. 加载会话列表分两步加载。
且第1步和第2步之间有些延迟,便于第1步的结果及时在ListView中显示出来。
mHandler.postDelayed(new LoadThreadsExtra(), 200);
第1步。从threads表中查找出数据,封装成TxrjThread,构建ConversationAdapter,在ListView中显示出来。
第2步。从sms, canonical_address, data等表中查找出hasDraftMsg, hasFailMsg, unreadCount, number, name等信息,调用notifyDataChanged()更新数据。
class LoadThreadsExtra implements Runnable {
List<Long> draftIds = null;
List<Long> failIds = null;
Map<Long, Integer> unreadMap = null;
Map<Integer, String> canonicalAddrMap = null;
Map<String, String> nameAddrMap = null;
@Override
public void run() {
draftIds = SmsDataManager.getThreadsWithDraftMsg(mContext);
failIds = SmsDataManager.getThreadsWithFailedMsg(mContext);
unreadMap = SmsDataManager.getThreadUnreadCountMap(mContext);
canonicalAddrMap = SmsDataManager.getCanonicalAddressMap(mContext);
nameAddrMap = SmsDataManager.getNameAddressMap(mContext);
int threadCount = mThreads.size();
for(int i=0;i<threadCount;i++){
TxrjThreads thread = mThreads.get(i);
long threadId = thread.getThreadId();
thread.setHasDraftMsg(draftIds.contains(threadId));
thread.setHasFailMsg(failIds.contains(threadId));
thread.setUnReadCount(unreadMap.containsKey(threadId) ? unreadMap.get(threadId) : 0);
setNameNumber(thread, thread.getRecipientId());
}
mHandler.sendEmptyMessage(TxrjConstant.WHAT_NOTIFY_DATA_CHANGED);
}
private void setNameNumber(TxrjThreads thread, String recipientIds) {
// 提取Number.
String[] ids = recipientIds.trim().split(" ");
StringBuffer sb = new StringBuffer();
for (int i = 0; i < ids.length; i++) {
sb.append(canonicalAddrMap.get(Integer.valueOf(ids[i])));
if (i != ids.length - 1) {
sb.append(",");
}
}
thread.setNumber(sb.toString());
sb = new StringBuffer();
// 提取Name.
String[] numbers = thread.getNumber().split(",");
for (int i = 0; i < numbers.length; i++) {
String name = nameAddrMap.get(numbers[i]);
sb.append(name == null ? numbers[i] : name);
if (i != numbers.length - 1) {
sb.append(",");
}
}
thread.setName(sb.toString());
}
}
2. 进入ConversationListActivity界面中,在加载数据之前也要延迟一点时间,便于Activity将UI及时显示出来,避免了UI显示慢的现象。
mHandler.postDelayed(new Runnable() {
public void run() {
new LoadThreadsTask().execute();
}
}, 200);
且第1步和第2步之间有些延迟,便于第1步的结果及时在ListView中显示出来。
mHandler.postDelayed(new LoadThreadsExtra(), 200);
第1步。从threads表中查找出数据,封装成TxrjThread,构建ConversationAdapter,在ListView中显示出来。
第2步。从sms, canonical_address, data等表中查找出hasDraftMsg, hasFailMsg, unreadCount, number, name等信息,调用notifyDataChanged()更新数据。
class LoadThreadsExtra implements Runnable {
List<Long> draftIds = null;
List<Long> failIds = null;
Map<Long, Integer> unreadMap = null;
Map<Integer, String> canonicalAddrMap = null;
Map<String, String> nameAddrMap = null;
@Override
public void run() {
draftIds = SmsDataManager.getThreadsWithDraftMsg(mContext);
failIds = SmsDataManager.getThreadsWithFailedMsg(mContext);
unreadMap = SmsDataManager.getThreadUnreadCountMap(mContext);
canonicalAddrMap = SmsDataManager.getCanonicalAddressMap(mContext);
nameAddrMap = SmsDataManager.getNameAddressMap(mContext);
int threadCount = mThreads.size();
for(int i=0;i<threadCount;i++){
TxrjThreads thread = mThreads.get(i);
long threadId = thread.getThreadId();
thread.setHasDraftMsg(draftIds.contains(threadId));
thread.setHasFailMsg(failIds.contains(threadId));
thread.setUnReadCount(unreadMap.containsKey(threadId) ? unreadMap.get(threadId) : 0);
setNameNumber(thread, thread.getRecipientId());
}
mHandler.sendEmptyMessage(TxrjConstant.WHAT_NOTIFY_DATA_CHANGED);
}
private void setNameNumber(TxrjThreads thread, String recipientIds) {
// 提取Number.
String[] ids = recipientIds.trim().split(" ");
StringBuffer sb = new StringBuffer();
for (int i = 0; i < ids.length; i++) {
sb.append(canonicalAddrMap.get(Integer.valueOf(ids[i])));
if (i != ids.length - 1) {
sb.append(",");
}
}
thread.setNumber(sb.toString());
sb = new StringBuffer();
// 提取Name.
String[] numbers = thread.getNumber().split(",");
for (int i = 0; i < numbers.length; i++) {
String name = nameAddrMap.get(numbers[i]);
sb.append(name == null ? numbers[i] : name);
if (i != numbers.length - 1) {
sb.append(",");
}
}
thread.setName(sb.toString());
}
}
2. 进入ConversationListActivity界面中,在加载数据之前也要延迟一点时间,便于Activity将UI及时显示出来,避免了UI显示慢的现象。
mHandler.postDelayed(new Runnable() {
public void run() {
new LoadThreadsTask().execute();
}
}, 200);
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