public class BootReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {

    Intent i = new Intent(context, MeuServico.class);
    i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    context.startActivity(i);

}

public class BootReceiver extends BroadcastReceiver{

    @Override
    public void onReceive(Context context, Intent intent) {
        System.out.println(intent.getAction());
        if (intent.getAction().equals(Intent.ACTION_USER_PRESENT))
        {
            Intent i = new Intent(context,MeuServico.class);
            i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(i);
        }
    }

<receiver android:name=".BootReceiver">
            <intent-filter>
                <action android:name="android.intent.action.USER_PRESENT" />
            </intent-filter>
</receiver>