相关疑难解决方法(0)

我想观看系统设置,并在其值发生变化时收到通知.Cursor类有一个setNotificationUri方法听起来不错,但它不起作用,编码也觉得很奇怪...那就是我做的:

    // Create a content resolver and add a listener
    ContentResolver resolver = getContentResolver();
    resolver.addStatusChangeListener(ContentResolver.SYNC_OBSERVER_TYPE_SETTINGS | ContentResolver.SYNC_OBSERVER_TYPE_PENDING | ContentResolver.SYNC_OBSERVER_TYPE_ACTIVE, new MyObserver());

    // I somehow need to get an instance of Cursor to use setNotificationUri in the next step...
    Cursor cursor2 = resolver.query(Settings.System.CONTENT_URI, null, null, null, null);

    // For testing purposes monitor all system settings
    cursor2.setNotificationUri(resolver, Settings.System.CONTENT_URI);

听众:

public class MyObserver implements SyncStatusObserver {

public void onStatusChanged(int which) {
    Log.d("TEST", "status changed, which = " + which);

}
} …