Android: Is it possible to listen for only insert and update operations using ContentObserver

Question

Actually, I have a table for which I am listing for changes using ContentObserver, and in OnChange(), I am triggering a SyncCall.

My requirement is to make a SyncCall only on insert or update operation and if the operation is delete, I dont want to make a SyncCall.

Registering a contentObserver for a table.

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);

My ContentObserver Class.

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();
}

Is there a way to listen for only insert and update operations using ContentObserver?

Or At Least is there a way that I can know what type of operation(insert, update or delete) that triggered the onChange() method in COntentObserver Class?

score 1 · Answer 1 · answered Sep 09 '15 at 14:55

ContentObserver by itself cannot know what operation caused the change. If you are the one sending the change notification, then you can either

Append something to the URI to indicate what the change was, e.g. a query parameter or fragment
Notify a different URI for different operations and listen for those also/instead.

Android: Is it possible to listen for only insert and update operations using ContentObserver

1 Answers1