content: /*
   * Copyright (C) 2018 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package android.telephony.mbms;
  
  import android.annotation.IntDef;
  import android.annotation.IntRange;
  import android.annotation.Nullable;
  
  import java.lang.annotation.Retention;
  import java.lang.annotation.RetentionPolicy;
  
  /**
   * A callback class for use when the application is in a group call. The middleware
   * will provide updates on the status of the call via this callback.
   */
  public interface GroupCallCallback {
      /** @hide */
      @Retention(RetentionPolicy.SOURCE)
      @IntDef(value = {
              MbmsErrors.ERROR_NO_UNIQUE_MIDDLEWARE,
              MbmsErrors.ERROR_MIDDLEWARE_LOST,
              MbmsErrors.ERROR_MIDDLEWARE_NOT_BOUND,
              MbmsErrors.GeneralErrors.ERROR_MIDDLEWARE_NOT_YET_READY,
              MbmsErrors.GeneralErrors.ERROR_OUT_OF_MEMORY,
              MbmsErrors.GeneralErrors.ERROR_MIDDLEWARE_TEMPORARILY_UNAVAILABLE,
              MbmsErrors.GeneralErrors.ERROR_IN_E911,
              MbmsErrors.GeneralErrors.ERROR_NOT_CONNECTED_TO_HOME_CARRIER_LTE,
              MbmsErrors.GeneralErrors.ERROR_UNABLE_TO_READ_SIM,
              MbmsErrors.GeneralErrors.ERROR_CARRIER_CHANGE_NOT_ALLOWED}, prefix = { "ERROR_" })
      @interface GroupCallError{}
  
      /**
       * Indicates broadcast signal strength is not available for this call.
       *
       * This may be due to the call no longer being available due to geography
       * or timing (end of service)
       */
      int SIGNAL_STRENGTH_UNAVAILABLE = -1;
  
      /**
       * Called by the middleware when it has detected an error condition in this group call. The
       * possible error codes are listed in {@link MbmsErrors}.
       * @param errorCode The error code.
       * @param message A human-readable message generated by the middleware for debugging purposes.
       */
      default void onError(@GroupCallError int errorCode, @Nullable String message) {}
  
      /**
       * Called to indicate this call has changed state.
       *
       * See {@link GroupCall#STATE_STOPPED}, {@link GroupCall#STATE_STARTED}
       * and {@link GroupCall#STATE_STALLED}.
       */
      default void onGroupCallStateChanged(@GroupCall.GroupCallState int state,
              @GroupCall.GroupCallStateChangeReason int reason) {}
  
      /**
       * Broadcast Signal Strength updated.
       *
       * This signal strength is the BROADCAST signal strength which,
       * depending on technology in play and it's deployment, may be
       * stronger or weaker than the traditional UNICAST signal
       * strength.  It a simple int from 0-4 for valid levels or
       * {@link #SIGNAL_STRENGTH_UNAVAILABLE} if broadcast is not available
       * for this call due to timing, geography or popularity.
       */
      default void onBroadcastSignalStrengthUpdated(
              @IntRange(from = -1, to = 4) int signalStrength) {}
  }
  