联系方式ContentObserver所谓随机 [英] Contacts ContentObserver called randomly
问题描述
我使用的是ContentObserver侦听更改联系人数据库。现在我认识到的onChange()方法被随机调用,即使我还没有做出任何更改的联系人。我怀疑这是某种相关的自动联系人同步(即使没有真正的改变触点在这一点)。
有没有可能得到通知仅当有在接触真正的改变,用户所做的?
THX西门
公共类ContactsObserver扩展ContentObserver {
私人最终静态字符串变量= ContactsObserver.class.getSimpleName();
私人上下文CTX;
私人列表< ContactsChangeListener>听众=新的ArrayList< ContactsChangeListener>();
私人ContactsObserver(上下文CTX){
超级(新处理程序());
this.ctx = ctx.getApplicationContext();
ctx.getContentResolver()
.registerContentObserver(
ContactsContract.Contacts.CONTENT_URI,// URI
假的,// notifyForDescendents
本); //观察员
}
@覆盖
公共无效的onChange(布尔selfChange){
Log.i(TAG,针数变);
对于(ContactsChangeListener L:听众){
l.onContactsChange();
}
}
@覆盖
公共布尔deliverSelfNotifications(){
返回false; //设置为true,并不能改变什么?
}
公共静态ContactsObserver寄存器(上下文CTX){
Log.d(TAG,注册);
返回新ContactsObserver(CTX);
}
公共无效注销(){
Log.d(TAG,注销);
。ctx.getContentResolver()unregisterContentObserver(本);
}
公共无效addContactsChangeListener(ContactsChangeListener L){
listeners.add(升);
}
公共接口ContactsChangeListener {
无效onContactsChange();
}
}
确定,因为似乎没有人有这个问题的答案,这里是我做了什么:
创建观察者的时候,我加载所有接触到缓存中。然后,在每一个的onChange()事件,我再次加载的联系,把它们比作缓存的人,看看是否是有差别与否。
不是最完美的解决方案,但它至少...
i am using a ContentObserver to listen for changes in the contacts database. now i realized that the onChange() method gets randomly called, even if i have not made any changes to the contacts. i suspect this is somehow related to the automatic contact syncing (even though there are no real changes to the contacts at this point).
is there a possibility to get notified only if there are real changes in the contacts, made by the user?
thx simon
public class ContactsObserver extends ContentObserver {
private final static String TAG = ContactsObserver.class.getSimpleName();
private Context ctx;
private List<ContactsChangeListener> listeners = new ArrayList<ContactsChangeListener>();
private ContactsObserver(Context ctx) {
super(new Handler());
this.ctx = ctx.getApplicationContext();
ctx.getContentResolver()
.registerContentObserver(
ContactsContract.Contacts.CONTENT_URI, // uri
false, // notifyForDescendents
this); // observer
}
@Override
public void onChange(boolean selfChange) {
Log.i(TAG, "Contacs change");
for(ContactsChangeListener l : listeners){
l.onContactsChange();
}
}
@Override
public boolean deliverSelfNotifications() {
return false; // set to true does not change anything...
}
public static ContactsObserver register(Context ctx){
Log.d(TAG, "register");
return new ContactsObserver(ctx);
}
public void unregister(){
Log.d(TAG, "unregister");
ctx.getContentResolver().unregisterContentObserver(this);
}
public void addContactsChangeListener(ContactsChangeListener l){
listeners.add(l);
}
public interface ContactsChangeListener{
void onContactsChange();
}
}
ok, since no one seems to have an answer to this question, here is what i've done:
when creating the observer, i load all the contacts into a cache. then, on every onChange() event, i load the contacts again and compare them to the cached ones to see if there is a difference or not.
not the most elegant solution, but it works at least...
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