How to use

getCallCapablePhoneAccounts

method

in

android.telecom.TelecomManager

@Test
@Config(minSdk = M)
public void getCallCapablePhoneAccounts() {
 PhoneAccountHandle callCapableHandle = createHandle("id1");
 telecomService.registerPhoneAccount(PhoneAccount.builder(callCapableHandle, "enabled")
   .setIsEnabled(true)
   .build());
 PhoneAccountHandle notCallCapableHandler = createHandle("id2");
 telecomService.registerPhoneAccount(PhoneAccount.builder(notCallCapableHandler, "disabled")
   .setIsEnabled(false)
   .build());
 List<PhoneAccountHandle> callCapablePhoneAccounts = telecomService.getCallCapablePhoneAccounts();
 assertThat(callCapablePhoneAccounts).contains(callCapableHandle);
 assertThat(callCapablePhoneAccounts).doesNotContain(notCallCapableHandler);
}

/**
 * Returns a list of {@link PhoneAccountHandle}s which can be used to make and receive phone
 * calls. The returned list includes only those accounts which have been explicitly enabled
 * by the user.
 *
 * @param telecomManager the {@link TelecomManager} used for method calls, if possible.
 * @return A list of PhoneAccountHandle objects.
 */
public static List<PhoneAccountHandle> getCallCapablePhoneAccounts(
    @Nullable TelecomManager telecomManager) {
  if (telecomManager != null && (CompatUtils.isMarshmallowCompatible()
      || CompatUtils.isMethodAvailable(TELECOM_MANAGER_CLASS,
          "getCallCapablePhoneAccounts"))) {
    return telecomManager.getCallCapablePhoneAccounts();
  }
  return new ArrayList<>();
}

  /**
   * Determines if one of the call capable phone accounts defined supports calling with a subject
   * specified.
   *
   * @param context The context.
   * @return {@code true} if one of the call capable phone accounts supports calling with a
   *      subject specified, {@code false} otherwise.
   */
  public static boolean isCallWithSubjectSupported(Context context) {
    if (!PermissionsUtil.hasPermission(context, android.Manifest.permission.READ_PHONE_STATE)
        || !CompatUtils.isCallSubjectCompatible()) {
      return false;
    }
    TelecomManager telecommMgr = (TelecomManager)
        context.getSystemService(Context.TELECOM_SERVICE);
    if (telecommMgr == null) {
      return false;
    }

    List<PhoneAccountHandle> accountHandles = telecommMgr.getCallCapablePhoneAccounts();
    for (PhoneAccountHandle accountHandle : accountHandles) {
      PhoneAccount account = telecommMgr.getPhoneAccount(accountHandle);
      if (account != null && account.hasCapabilities(PhoneAccount.CAPABILITY_CALL_SUBJECT)) {
        return true;
      }
    }
    return false;
  }
}

List<PhoneAccountHandle> accountHandles = telecommMgr.getCallCapablePhoneAccounts();
for (PhoneAccountHandle accountHandle : accountHandles) {
  PhoneAccount account = telecommMgr.getPhoneAccount(accountHandle);