| /* |
| * Copyright (C) 2021 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.ims; |
| |
| import android.annotation.CallbackExecutor; |
| import android.annotation.IntDef; |
| import android.annotation.NonNull; |
| import android.os.Binder; |
| |
| import com.android.internal.telephony.IImsStateCallback; |
| |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| import java.lang.ref.WeakReference; |
| import java.util.concurrent.Executor; |
| |
| /** |
| * A callback class used for monitoring changes in IMS service connection states |
| * for a specific subscription. |
| * <p> |
| * @see ImsMmTelManager#registerImsStateCallback(Executor, ImsStateCallback) |
| * @see ImsRcsManager#registerImsStateCallback(Executor, ImsStateCallback) |
| */ |
| public abstract class ImsStateCallback { |
| |
| /** @hide */ |
| @Retention(RetentionPolicy.SOURCE) |
| @IntDef(prefix = "REASON_", value = { |
| REASON_UNKNOWN_TEMPORARY_ERROR, |
| REASON_UNKNOWN_PERMANENT_ERROR, |
| REASON_IMS_SERVICE_DISCONNECTED, |
| REASON_NO_IMS_SERVICE_CONFIGURED, |
| REASON_SUBSCRIPTION_INACTIVE, |
| REASON_IMS_SERVICE_NOT_READY |
| }) |
| public @interface DisconnectedReason {} |
| |
| /** |
| * The underlying IMS service is temporarily unavailable for the |
| * associated subscription. |
| * {@link #onAvailable} will be called when the IMS service becomes |
| * available again. |
| */ |
| public static final int REASON_UNKNOWN_TEMPORARY_ERROR = 1; |
| |
| /** |
| * The underlying IMS service is permanently unavailable for the |
| * associated subscription and there will be no Manager available for |
| * this subscription. |
| */ |
| public static final int REASON_UNKNOWN_PERMANENT_ERROR = 2; |
| |
| /** |
| * The underlying IMS service has died, is reconfiguring, or has never |
| * come up yet and as a result is currently unavailable. |
| * {@link #onAvailable} will be called when the IMS service becomes |
| * available. All callbacks should be unregistered now and registered again |
| * if the IMS service moves back to available. |
| */ |
| public static final int REASON_IMS_SERVICE_DISCONNECTED = 3; |
| |
| /** |
| * There is no IMS service configured for the subscription ID specified. |
| * This is a permanent error and there will be no Manager available for |
| * this subscription. |
| */ |
| public static final int REASON_NO_IMS_SERVICE_CONFIGURED = 4; |
| |
| /** |
| * The subscription associated with this Manager has moved to an inactive |
| * state (e.g. SIM removed) and the IMS service has torn down the resources |
| * related to this subscription. This has caused this callback |
| * to be deregistered. The callback must be re-registered when this subscription |
| * becomes active in order to continue listening to the IMS service state. |
| */ |
| public static final int REASON_SUBSCRIPTION_INACTIVE = 5; |
| |
| /** |
| * The IMS service is connected, but in a NOT_READY state. Once the |
| * service moves to ready, {@link #onAvailable} will be called. |
| */ |
| public static final int REASON_IMS_SERVICE_NOT_READY = 6; |
| |
| private IImsStateCallbackStub mCallback; |
| |
| /** |
| * @hide |
| */ |
| public void init(@NonNull @CallbackExecutor Executor executor) { |
| if (executor == null) { |
| throw new IllegalArgumentException("ImsStateCallback Executor must be non-null"); |
| } |
| mCallback = new IImsStateCallbackStub(this, executor); |
| } |
| |
| /** |
| * Using a static class and weak reference here to avoid memory leak caused by the |
| * IImsStateCallback.Stub callback retaining references to the outside ImsStateCallback. |
| */ |
| private static class IImsStateCallbackStub extends IImsStateCallback.Stub { |
| private WeakReference<ImsStateCallback> mImsStateCallbackWeakRef; |
| private Executor mExecutor; |
| |
| IImsStateCallbackStub(ImsStateCallback imsStateCallback, Executor executor) { |
| mImsStateCallbackWeakRef = new WeakReference<ImsStateCallback>(imsStateCallback); |
| mExecutor = executor; |
| } |
| |
| Executor getExecutor() { |
| return mExecutor; |
| } |
| |
| public void onAvailable() { |
| ImsStateCallback callback = mImsStateCallbackWeakRef.get(); |
| if (callback == null) return; |
| |
| Binder.withCleanCallingIdentity( |
| () -> mExecutor.execute(() -> callback.onAvailable())); |
| } |
| |
| public void onUnavailable(int reason) { |
| ImsStateCallback callback = mImsStateCallbackWeakRef.get(); |
| if (callback == null) return; |
| |
| Binder.withCleanCallingIdentity( |
| () -> mExecutor.execute(() -> callback.onUnavailable(reason))); |
| } |
| } |
| |
| /** |
| * The IMS service has disconnected or is reporting NOT_READY and is no longer |
| * available to users. The user should clean up all related state and |
| * unregister callbacks. If it is a temporary error, {@link #onAvailable} will |
| * be called when the IMS service becomes available again. |
| * |
| * @param reason the specified reason |
| */ |
| public abstract void onUnavailable(@DisconnectedReason int reason); |
| |
| /** |
| * The IMS service is connected and is ready for communication over the |
| * provided Manager. |
| */ |
| public abstract void onAvailable(); |
| |
| /** |
| * An unexpected error has occurred and the Telephony process has crashed. This |
| * has caused this callback to be deregistered. The callback must be |
| * re-registered in order to continue listening to the IMS service state. |
| */ |
| public abstract void onError(); |
| |
| /** |
| * The callback to notify the death of telephony process |
| * @hide |
| */ |
| public final void binderDied() { |
| if (mCallback != null) { |
| mCallback.getExecutor().execute(() -> onError()); |
| } |
| } |
| |
| /** |
| * Return the callback binder |
| * @hide |
| */ |
| public IImsStateCallbackStub getCallbackBinder() { |
| return mCallback; |
| } |
| } |