/* package */
void resumeWaitingOrHolding() throws CallStateException {
if (DBG) log("resumeWaitingOrHolding");
try {
if (mForegroundCall.getState().isAlive()) {
// resume foreground call after holding background call
// they were switched before holding
ImsCall imsCall = mForegroundCall.getImsCall();
if (imsCall != null) imsCall.resume();
} else if (mRingingCall.getState() == ImsPhoneCall.State.WAITING) {
// accept waiting call after holding background call
ImsCall imsCall = mRingingCall.getImsCall();
if (imsCall != null) imsCall.accept(ImsCallProfile.CALL_TYPE_VOICE);
} else {
// Just resume background call.
// To distinguish resuming call with swapping calls
// we do not switch calls.here
// ImsPhoneConnection.update will chnage the parent when completed
ImsCall imsCall = mBackgroundCall.getImsCall();
if (imsCall != null) imsCall.resume();
}
} catch (ImsException e) {
throw new CallStateException(e.getMessage());
}
}
