안드로이드 전화 수발신 이력 발생에 따른 옵저버 처리

https://stackoverflow.com/questions/4422410/how-to-implement-a-contentobserver-for-call-logs

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
    }
}

shareimprove this answer

edited Feb 12 '14 at 11:13

answered Dec 14 '10 at 2:55

Roger Câmara

6,6402076124

• 5
  don't forget to unregister the provider in the onDestroy() method. – moonlightcheese Mar 11 '11 at 15:35
• 2
  in the line new RatedCallsContentObserver(handler)); where does the handler come from / why do I need this? thanks! – stefan.at.wpf May 31 '11 at 17:14 
• 3
  just passing in new Handler() instead of handler works. I am just not sure if it's the best way, have to read on it. – stefan.at.wpf May 31 '11 at 17:20
• 1
  this handler parameter is to run onChange(boolean) on. onChange() will happen on the provider Handler. See the docs developer.android.com/reference/android/database/… – Roger Câmara Jun 2 '11 at 13:48
• 2
  @BenH If you don't unregister a previously registered observer, it will stay in memory. You will get a memory leak because the object that you registered to keeps a reference to your activity. – Maarten Oct 22 '13 at 17:34