How to implement a ContentObserver for call logs

Question

I\'d like to know if there is a way to know if the content provider of callings has changed. I mean, if I make a call, or I answer a call, it returns a \"flag\" that a new l

Answer 1

Simply create a new subclass of ContentObserver class and override it's onChange() method. The onChange() method will contain all the code that will be executed on content change.

public class MyObserver extends ContentObserver {
    public MyObserver(Handler handler) {
            super(handler);
        }

    @Override
    public void onChange(boolean selfChange) {
        this.onChange(selfChange,null);
    }

    @Override
    public void onChange(boolean selfChange, Uri uri) {
        //Write your code here      }
}

Then all you have to do is register your content provider to the URI.

getContentResolver().registerContentObserver(YourURI,true,myObserver);

Remember to unregister your content observer object or else it can lead to memory leak.

Source: Use Android's ContentObserver To React On Content Changes

Answer 2

Here is the answer. Dont forget to register the content observer with this method:

registerContentObserver (Uri uri, boolean notifyForDescendents, ContentObserver observer)

And then you can create it like this.

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.getApplicationContext()
    .getContentResolver()
    .registerContentObserver(
            android.provider.CallLog.Calls.CONTENT_URI, true,
            new MyContentObserver(handler)); 
}

class MyContentObserver extends ContentObserver {
    public MyContentObserver(Handler h) {
        super(h);
    }

    @Override
    public boolean deliverSelfNotifications() {
        return true;
    }

    @Override
    public void onChange(boolean selfChange) {
        Log.d(LOG_TAG, "MyContentObserver.onChange("+selfChange+")");
        super.onChange(selfChange);

        // here you call the method to fill the list
    }
}