您好，我正在实现一个 SMS 应用程序，现在能够检索所有消息及其各自的联系信息，如显示名称、照片 uri.. 并将它们显示在自定义列表中，点击项目将带您进入相应的讨论。我的问题是同步所有这些消息所花费的时间，
- 这次我需要优化。
- 每次我在讨论 View 中发送新消息并返回到最近的聊天时，我只需要更新特定项目，而不是整个列表。
这是我的代码:
读取短信.java:
public class ReadSMS {
ArrayList<HashMap<Contact, ArrayList<OneComment>>> recentChats;
Application _context;
public ReadSMS(Application context) {
this._context = context;
this.recentChats = ((ChatApplication) _context).getChats();
}
public ArrayList<HashMap<Contact, ArrayList<OneComment>>> getSMS() {
// Init
ArrayList<SmsMsg> smsMsgs = new ArrayList<SmsMsg>();
TreeSet<Integer> threadIds = new TreeSet<Integer>();
Uri mSmsinboxQueryUri = Uri.parse("content://sms");
Cursor cursor = _context.getContentResolver().query(
mSmsinboxQueryUri,
new String[] { "_id", "thread_id", "address", "date", "body",
"type" }, null, null, null);
String[] columns = new String[] { "address", "thread_id", "date",
"body", "type" };
if (cursor.getCount() > 0) {
while (cursor.moveToNext()) {
SmsMsg smsMsg = new SmsMsg();
String address = null, displayName = null, date = null, msg = null, type = null, threadId = null;
Uri photoUri = null;
threadId = cursor.getString(cursor.getColumnIndex(columns[1]));
type = cursor.getString(cursor.getColumnIndex(columns[4]));
if (Integer.parseInt(type) == 1 || Integer.parseInt(type) == 2) {
address = cursor.getString(cursor
.getColumnIndex(columns[0]));
if (address.length() > 0) {
String[] contactData = getContactByNumber(address);
if (contactData != null) {
displayName = contactData[0];
if (contactData[1] != null)
photoUri = Uri.parse(contactData[1]);
}
} else
address = null;
date = cursor.getString(cursor.getColumnIndex(columns[2]));
msg = cursor.getString(cursor.getColumnIndex(columns[3]));
smsMsg.setDisplayName(displayName);
smsMsg.setThreadId(threadId);
smsMsg.setAddress(address);
smsMsg.setPhotoUri(photoUri);
smsMsg.setDate(date);
smsMsg.setMsg(msg);
smsMsg.setType(type);
// Log.e("SMS-inbox", "\n\nNAME: " + displayName
// + "\nTHREAD_ID: " + threadId + "\nNUMBER: "
// + address + "\nPHOTO_URI: " + photoUri + "\nTIME: "
// + date + "\nMESSAGE: " + msg + "\nTYPE: " + type);
smsMsgs.add(smsMsg);
// Add threadId to Tree
threadIds.add(Integer.parseInt(threadId));
}
}
for (int threadId : threadIds) {
HashMap<Contact, ArrayList<OneComment>> oneChat = new HashMap<Contact, ArrayList<OneComment>>();
Contact con = new Contact();
ArrayList<OneComment> oneDisc = new ArrayList<OneComment>();
for (SmsMsg smsMsg : smsMsgs) {
if (Integer.parseInt(smsMsg.getThreadId()) == threadId) {
con.setContactName(smsMsg.getDisplayName());
con.setContactNumber(smsMsg.getAddress());
con.setContactPhotoUri(smsMsg.getPhotoUri());
if (Integer.parseInt(smsMsg.getType()) == 1)
oneDisc.add(0, new OneComment(true,
smsMsg.getMsg(), smsMsg.getDisplayName(),
smsMsg.getDate(), false));
else if (Integer.parseInt(smsMsg.getType()) == 2)
oneDisc.add(0,
new OneComment(false, smsMsg.getMsg(),
"Me", smsMsg.getDate(), false));
}
}
oneChat.put(con, oneDisc);
// add at pos 0
recentChats.add(0, oneChat);
}
}
return recentChats;
}
public String[] getContactByNumber(final String number) {
String[] data = new String[2];
try {
Uri uri = Uri.withAppendedPath(PhoneLookup.CONTENT_FILTER_URI,
Uri.encode(number));
Cursor cur = _context.getContentResolver().query(uri,
new String[] { PhoneLookup.DISPLAY_NAME, PhoneLookup._ID },
null, null, null);
if (cur.moveToFirst()) {
int nameIdx = cur.getColumnIndex(PhoneLookup.DISPLAY_NAME);
data[0] = cur.getString(nameIdx);
String contactId = cur.getString(cur
.getColumnIndex(PhoneLookup._ID));
Uri photoUri = getContactPhotoUri(Long.parseLong(contactId));
if (photoUri != null)
data[1] = photoUri.toString();
else
data[1] = null;
cur.close();
return data;
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public Uri getContactPhotoUri(long contactId) {
Uri photoUri = ContentUris.withAppendedId(Contacts.CONTENT_URI,
contactId);
photoUri = Uri.withAppendedPath(photoUri,
Contacts.Photo.CONTENT_DIRECTORY);
return photoUri;
}
}
SmsMsg.java POJO:
public class SmsMsg {
private String address = null;
private String displayName = null;
private String threadId = null;
private String date = null;
private String msg = null;
private String type = null;
Uri photoUri = null;
public Uri getPhotoUri() {
return photoUri;
}
public void setPhotoUri(Uri photoUri) {
this.photoUri = photoUri;
}
public String getDisplayName() {
return displayName;
}
public void setDisplayName(String displayName) {
this.displayName = displayName;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getThreadId() {
return threadId;
}
public void setThreadId(String threadId) {
this.threadId = threadId;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
}
最佳答案
POJO 存储不是一个很好的方法，因为它们需要一直保留在内存中，否则重新加载会导致痛苦和缓慢。
在这种情况下，您应该创建一个更新 sqlite 数据库的服务，并将其显示为 ContentProvider . sqlite 数据库应仅包含 Android 未提供的结构，即您的 Contact/Threads 层次结构，以及您可能在列表中显示的任何数据，例如最新消息的文本。
This thread讨论了如何检测新的 SMS 消息到达/发送，无论是从您的应用程序还是其他应用程序，这可能是您真正想要的，而不是简单地检测用户从您自己的应用程序发布消息。 Service应该执行这个任务，UI Activity只需要观察ContentProvider。
旁白:我想知道用户如何向他们尚未向其发送消息的联系人发送消息，因为您的列表仅包含他们已向其发送消息的联系人。
关于Android 从收件箱中获取短信，优化了读取所有消息并将它们分组的方式，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/14545661/