1
. ConversationList短息会话列表界面
1
. 开始进行加载
ConversationList:
protected void onStart(){
...
// 进行异步查询
startAsyncQuery();
}
private void startAsyncQuery() {
...
// 加载消息
mLoaderFragment.reLoadMessage(THREAD_LIST_QUERY_TOKEN,
// token: 1701
Conversation.sAllThreadsUri,
// 查询的Uri: content://mms-sms/conversations&simple=true
Conversation.ALL_THREADS_PROJECTION,
// 查询的字段
null,
null,
Conversations.DEFAULT_SORT_ORDER);
...
}
2
. 进入到MessageLoaderFragment, 进行加载
MessageLoaderFragment:
public void reLoadMessage(
int loadId, Uri uri, String[] projection,
String selection, String[] selectionArgs, String orderBy) {
...
// 进行异步加载
getLoaderManager().restartLoader(loadId,
null, mMessageLoaderListener);
}
3
. 进入到MmsSmsProvider中执行查询流程
MmsSmsProvider:
public Cursor query(Uri uri, String[] projection,
String selection, String[] selectionArgs, String sortOrder) {
...
switch(URI_MATCHER.match(uri)) {
...
case URI_CONVERSATIONS:
String simple = uri.getQueryParameter("simple"
);
if ((simple !=
null) && simple.equals("true"
)) {
String threadType = uri.getQueryParameter("thread_type");
// 获取会话类型
if (!
TextUtils.isEmpty(threadType)) {
selection = concatSelections(selection, Threads.TYPE + "=" +
threadType);
}
// 获取简单会话
cursor =
getSimpleConversations(projection, selection, selectionArgs, sortOrder);
} else {
cursor =
getConversations(projection, selection, sortOrder);
}
break;
...
}
...
return cursor;
}
private Cursor getSimpleConversations(String[] projection, String selection,
String[] selectionArgs, String sortOrder) {
// 到此处已完成会话的查询, 接下来看数据的填充
return mOpenHelper.getReadableDatabase().query(TABLE_THREADS,
// threads数据库
projection, selection,
selectionArgs, null,
null,
" date DESC"
);
}
4. 数据加载完成后回调到MessageLoaderFragment$LoaderManager.LoaderCallbacks<Cursor>
中
MessageLoaderFragment$LoaderManager.LoaderCallbacks<Cursor>
:
public void onLoadFinished(Loader<Cursor>
loader, Cursor data) {
...
// 数据加载完成回调到ConversationList中
mListener.onMessageLoaded(data, loader);
}
5
. 数据回调到ConversationList$MessageLoaderFragmentListener中
ConversationList$MessageLoaderFragmentListener:
public void onMessageLoaded(Cursor cursor, Loader<Cursor>
loader) {
// 更新UI
mListAdapter.changeCursor(cursor);
...
}
短信会话列表加载涉及到的数据库:
MmsSmsDatabaseHelper:
数据库名: MmsSmsProvider:
static final String TABLE_THREADS = "threads"
数据库的创建:
private void createCommonTables(SQLiteDatabase db) {
...
db.execSQL("CREATE TABLE threads (" +
Threads._ID + " INTEGER PRIMARY KEY AUTOINCREMENT," +
// id
Threads.DATE + " INTEGER DEFAULT 0," +
// 时间
Threads.MESSAGE_COUNT + " INTEGER DEFAULT 0," +
// 消息数量
Threads.RECIPIENT_IDS + " TEXT," +
// 接受者ID
Threads.SNIPPET + " TEXT," +
// 片段
Threads.SNIPPET_CHARSET + " INTEGER DEFAULT 0," +
// 片段编码
Threads.READ + " INTEGER DEFAULT 1," +
// 是否已读
Threads.TYPE + " INTEGER DEFAULT 0," +
// 类型
Threads.ERROR + " INTEGER DEFAULT 0," +
// 是否有错
Threads.HAS_ATTACHMENT + " INTEGER DEFAULT 0," +
// 是否有附件
Threads.RECIPIENT_ADDRESSES + " TEXT, " +
// 接受者地址
Threads.RECIPIENT_NAMES + " TEXT ); ");
// 接受者姓名
}
转载于:https://www.cnblogs.com/firmly-believe/p/10719261.html
