Android：是否可以使用ContentObserver监听插入和更新操作

Question

实际上，我有一个表，我正在使用ContentObserver列出更改，在OnChange（）中，我正在触发SyncCall。

我的要求是仅在插入或更新操作时进行SyncCall，如果操作是删除，我不想进行SyncCall。

为表格注册contentObserver。

ContentResolver mResolver = context.getContentResolver();
    // Construct a URI that points to the content provider data table
    Uri mUri = HistoryDetailsContract.HistoryEntries.CONTENT_URI;
    /*
     * Create a content observer object.
     * Its code does not mutate the provider, so set
     * selfChange to "false"
     */
    TableContnetObserver observer = new TableContnetObserver(null);
    /*
     * Register the observer for the data table. The table's path
     * and any of its sub paths trigger the observer.
     */
    mResolver.registerContentObserver(mUri, true, observer);

我的ContentObserver类。

public class TableContnetObserver extends ContentObserver {

public TableContnetObserver(Handler handler) {
    super(handler);
}

/*
 * Define a method that's called when data in the
 * observed content provider changes.
 */
@Override
public void onChange(boolean selfChange, Uri changeUri) {
    /*
     * Ask the framework to run your sync adapter.
     * To maintain backward compatibility, assume that
     * changeUri is null.
     */
    //ContentResolver.requestSync(GenericAccountService.GetAccount(), HistoryDetailsContract.AUTHORITY, new Bundle());   
    SyncUtils.TriggerRefresh();
}

有没有办法只使用ContentObserver监听插入和更新操作？

或者至少有一种方法可以让我知道在COntentObserver类中触发了onChange（）方法的操作类型（插入，更新或删除）？