Issues with ACTION_HEADSET_PLUG broadcast in Android

Question

I've tried these phones: Motorolla Backflip 1.5, Nexus One 2.1

Basically I register BroadcastReceiver to get ACTION_HEADSET_PLUG broadcast and look on 3 extras that come in intent:

• state
• name
• microphone

Here is the description from API:

* state - 0 for unplugged, 1 for plugged.
* name - Headset type, human readable string
* microphone - 1 if headset has a microphone, 0 otherwise

Issue #1: Broadcast comes when activity is started (not expected), when screen rotation happens (not expected) and when headset/headphones plugged/unplugged (expected).

Issue #2: Backflip phone (1.5) sends null for state + microphone, 'No Device' as name when headset/headphones unplugged, and sends null for state + microphone, 'Stereo HeadSet'/'Stereo HeadPhones' as name when headset/headphones plugged.

UPDATE: T-Mobile G1 with 1.6 behaves the same as Backflip phone.

Nexus even worse, it always sends null for state + microphone, 'Headset' as name when headset/headphones plugged or unplugged.

Question: How it can be explained that API is broken so much on both 1.5 and 2.1 versions and different devices, manufactures?

UPDATE:

Code in onCreate of main Activity:

// Register receiver
    this.registerReceiver(new BroadcastsHandler(), new IntentFilter(Intent.ACTION_HEADSET_PLUG));

Now the code of BroadcastReceiver:

public class BroadcastsHandler extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {
    if (intent.getAction().equalsIgnoreCase(Intent.ACTION_HEADSET_PLUG)) {
        String data = intent.getDataString();
        Bundle extraData = intent.getExtras();

        String st = intent.getStringExtra("state");
        String nm = intent.getStringExtra("name");
        String mic = intent.getStringExtra("microphone");
        String all = String.format("st=%s, nm=%s, mic=%s", st, nm, mic);


        AlertDialog.Builder builder = new AlertDialog.Builder(context);
        builder.setTitle("Headset broadcast");
        builder.setMessage(all);
        builder.setPositiveButton("Okey-dokey", new DialogInterface.OnClickListener() {

            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
            }
        });
        builder.create().show();
    }
}

}

Answer 1

Silly me, the problem is slightly different - 'state' and 'name' are there without 'microphone'. Another thing - 'state' is 0 and 1 for headphones, and 0 and 3 for headset. Super weird...