[Settings] Changes for supporting replacing ImsManager

Wrap IMS related APIs in order to support replacing ImsManager.

Bug: 140542283
Test: build pass
Merged-In: I10aff50b6f3fc50b2f336ee320740f9f4a81e256
Change-Id: Ibc8c1c36fe031a3d845b99f878ef45ce5db7de28

src/com/android/settings/network/ims/BooleanConsumer.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2020 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 com.android.settings.network.ims;
+
+import java.util.concurrent.Semaphore;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.function.Consumer;
+
+class BooleanConsumer extends Semaphore implements Consumer<Boolean> {
+
+    private static final String TAG = "BooleanConsumer";
+
+    BooleanConsumer() {
+        super(0);
+        mValue = new AtomicBoolean();
+    }
+
+    private volatile AtomicBoolean mValue;
+
+    /**
+     * Get boolean value reported from callback
+     *
+     * @param timeout callback waiting time in milliseconds
+     * @return boolean value reported
+     * @throws InterruptedException when thread get interrupted
+     */
+    boolean get(long timeout) throws InterruptedException {
+        tryAcquire(timeout, TimeUnit.MILLISECONDS);
+        return mValue.get();
+    }
+
+    /**
+     * Implementation of {@link Consumer#accept(Boolean)}
+     *
+     * @param value boolean reported from {@link Consumer#accept(Boolean)}
+     */
+    public void accept(Boolean value) {
+        if (value != null) {
+            mValue.set(value.booleanValue());
+        }
+        release();
+    }
+}

src/com/android/settings/network/ims/ImsQuery.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2020 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 com.android.settings.network.ims;
+
+
+/**
+ * An interface for direct querying IMS, and return {@link boolean}
+ */
+public interface ImsQuery {
+
+    /**
+     * Interface for performing IMS status/configuration query through public APIs
+     *
+     * @return result of query in boolean
+     */
+    boolean query();
+
+}

src/com/android/settings/network/ims/ImsQueryController.java

@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2020 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 com.android.settings.network.ims;
+
+import android.telephony.AccessNetworkConstants;
+import android.telephony.SubscriptionManager;
+import android.telephony.ims.ImsException;
+import android.telephony.ims.ImsMmTelManager;
+import android.telephony.ims.feature.ImsFeature;
+import android.telephony.ims.feature.MmTelFeature;
+import android.telephony.ims.stub.ImsRegistrationImplBase;
+
+import androidx.annotation.VisibleForTesting;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+/**
+ * Controller class for querying IMS status
+ */
+abstract class ImsQueryController {
+
+    private static final long TIMEOUT_MILLIS = 2000;
+
+    private volatile int mCapability;
+    private volatile int mTech;
+    private volatile int mTransportType;
+
+    /**
+     * Constructor for query IMS status
+     *
+     * @param capability {@link MmTelFeature.MmTelCapabilities#MmTelCapability}
+     * @param tech {@link ImsRegistrationImplBase#ImsRegistrationTech}
+     * @param transportType {@link AccessNetworkConstants#TransportType}
+     */
+    ImsQueryController(
+            @MmTelFeature.MmTelCapabilities.MmTelCapability int capability,
+            @ImsRegistrationImplBase.ImsRegistrationTech int tech,
+            @AccessNetworkConstants.TransportType int transportType) {
+        mCapability = capability;
+        mTech = tech;
+        mTransportType = transportType;
+    }
+
+    abstract boolean isEnabledByUser(int subId);
+
+    @VisibleForTesting
+    boolean isTtyOnVolteEnabled(int subId) {
+        return (new ImsQueryTtyOnVolteStat(subId)).query();
+    }
+
+    @VisibleForTesting
+    boolean isEnabledByPlatform(int subId) throws InterruptedException, ImsException,
+            IllegalArgumentException {
+        if (!SubscriptionManager.isValidSubscriptionId(subId)) {
+            return false;
+        }
+
+        final ImsMmTelManager imsMmTelManager = ImsMmTelManager.createForSubscriptionId(subId);
+        // TODO: have a shared thread pool instead of create ExecutorService
+        //       everytime to improve performance.
+        final ExecutorService executor = Executors.newSingleThreadExecutor();
+        final BooleanConsumer booleanResult = new BooleanConsumer();
+        imsMmTelManager.isSupported(mCapability, mTransportType, executor, booleanResult);
+        // get() will be blocked until end of execution(isSupported()) within thread(executor)
+        // or timeout after TIMEOUT_MILLIS milliseconds
+        return booleanResult.get(TIMEOUT_MILLIS);
+    }
+
+    @VisibleForTesting
+    boolean isProvisionedOnDevice(int subId) {
+        if (!SubscriptionManager.isValidSubscriptionId(subId)) {
+            return false;
+        }
+        return (new ImsQueryProvisioningStat(subId, mCapability, mTech)).query();
+    }
+
+    @VisibleForTesting
+    boolean isServiceStateReady(int subId) throws InterruptedException, ImsException,
+            IllegalArgumentException {
+        if (!SubscriptionManager.isValidSubscriptionId(subId)) {
+            return false;
+        }
+
+        final ImsMmTelManager imsMmTelManager = ImsMmTelManager.createForSubscriptionId(subId);
+        // TODO: have a shared thread pool instead of create ExecutorService
+        //       everytime to improve performance.
+        final ExecutorService executor = Executors.newSingleThreadExecutor();
+        final IntegerConsumer intResult = new IntegerConsumer();
+        imsMmTelManager.getFeatureState(executor, intResult);
+        return (intResult.get(TIMEOUT_MILLIS) == ImsFeature.STATE_READY);
+    }
+}

src/com/android/settings/network/ims/ImsQueryEnhanced4gLteModeUserSetting.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2020 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 com.android.settings.network.ims;
+
+import android.telephony.ims.ImsMmTelManager;
+import android.util.Log;
+
+
+/**
+ * An {@link ImsQuery} for accessing IMS user setting for enhanced 4G LTE
+ */
+public class ImsQueryEnhanced4gLteModeUserSetting implements ImsQuery {
+
+    private static final String LOG_TAG = "QueryEnhanced4gLteModeUserSetting";
+    /**
+     * Constructor
+     * @param subId subscription id
+     */
+    public ImsQueryEnhanced4gLteModeUserSetting(int subId) {
+        mSubId = subId;
+    }
+
+    private volatile int mSubId;
+
+    /**
+     * Implementation of interface {@link ImsQuery#query()}
+     *
+     * @return result of query
+     */
+    public boolean query() {
+        try {
+            final ImsMmTelManager imsMmTelManager =
+                    ImsMmTelManager.createForSubscriptionId(mSubId);
+            return imsMmTelManager.isAdvancedCallingSettingEnabled();
+        } catch (IllegalArgumentException exception) {
+            Log.w(LOG_TAG, "fail to get VoLte settings. subId=" + mSubId, exception);
+        }
+        return false;
+    }
+}

src/com/android/settings/network/ims/ImsQueryProvisioningStat.java

@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2020 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 com.android.settings.network.ims;
+
+import android.telephony.ims.ProvisioningManager;
+import android.telephony.ims.feature.MmTelFeature;
+import android.telephony.ims.stub.ImsRegistrationImplBase;
+import android.util.Log;
+
+
+/**
+ * An {@link ImsQuery} for accessing IMS provision stat
+ */
+public class ImsQueryProvisioningStat implements ImsQuery {
+
+    private static final String LOG_TAG = "QueryPrivisioningStat";
+
+    private volatile int mSubId;
+    private volatile int mCapability;
+    private volatile int mTech;
+
+    /**
+     * Constructor
+     * @param subId subscription id
+     * @param capability {@link MmTelFeature.MmTelCapabilities#MmTelCapability}
+     * @param tech {@link ImsRegistrationImplBase#ImsRegistrationTech}
+     */
+    public ImsQueryProvisioningStat(int subId,
+            @MmTelFeature.MmTelCapabilities.MmTelCapability int capability,
+            @ImsRegistrationImplBase.ImsRegistrationTech int tech) {
+        mSubId = subId;
+        mCapability = capability;
+        mTech = tech;
+    }
+
+    /**
+     * Implementation of interface {@link ImsQuery#query()}
+     *
+     * @return result of query
+     */
+    public boolean query() {
+        try {
+            final ProvisioningManager privisionManager =
+                    ProvisioningManager.createForSubscriptionId(mSubId);
+            return privisionManager.getProvisioningStatusForCapability(mCapability, mTech);
+        } catch (IllegalArgumentException exception) {
+            Log.w(LOG_TAG, "fail to get Provisioning stat. subId=" + mSubId, exception);
+        }
+        return false;
+    }
+}

src/com/android/settings/network/ims/ImsQueryTtyOnVolteStat.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2020 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 com.android.settings.network.ims;
+
+import android.telephony.ims.ImsMmTelManager;
+import android.util.Log;
+
+
+/**
+ * An {@link ImsQuery} for accessing IMS tty on VoLte stat
+ */
+public class ImsQueryTtyOnVolteStat implements ImsQuery {
+
+    private static final String LOG_TAG = "QueryTtyOnVolteStat";
+
+    /**
+     * Constructor
+     * @param subId subscription id
+     */
+    public ImsQueryTtyOnVolteStat(int subId) {
+        mSubId = subId;
+    }
+
+    private volatile int mSubId;
+
+    /**
+     * Implementation of interface {@link ImsQuery#query()}
+     *
+     * @return result of query
+     */
+    public boolean query() {
+        try {
+            final ImsMmTelManager imsMmTelManager =
+                    ImsMmTelManager.createForSubscriptionId(mSubId);
+            return imsMmTelManager.isTtyOverVolteEnabled();
+        } catch (IllegalArgumentException exception) {
+            Log.w(LOG_TAG, "fail to get VoLte Tty Stat. subId=" + mSubId, exception);
+        }
+        return false;
+    }
+}

src/com/android/settings/network/ims/ImsQueryVtUserSetting.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2020 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 com.android.settings.network.ims;
+
+import android.telephony.ims.ImsMmTelManager;
+import android.util.Log;
+
+
+/**
+ * An {@link ImsQuery} for accessing IMS VT enabled settings from user
+ */
+public class ImsQueryVtUserSetting implements ImsQuery {
+
+    private static final String LOG_TAG = "QueryVtUserSetting";
+
+    /**
+     * Constructor
+     * @param subId subscription id
+     */
+    public ImsQueryVtUserSetting(int subId) {
+        mSubId = subId;
+    }
+
+    private volatile int mSubId;
+
+    /**
+     * Implementation of interface {@link ImsQuery#query()}
+     *
+     * @return result of query
+     */
+    public boolean query() {
+        try {
+            final ImsMmTelManager imsMmTelManager =
+                    ImsMmTelManager.createForSubscriptionId(mSubId);
+            return imsMmTelManager.isVtSettingEnabled();
+        } catch (IllegalArgumentException exception) {
+            Log.w(LOG_TAG, "fail to get VT settings. subId=" + mSubId, exception);
+        }
+        return false;
+    }
+}

src/com/android/settings/network/ims/ImsQueryWfcUserSetting.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2020 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 com.android.settings.network.ims;
+
+import android.telephony.ims.ImsMmTelManager;
+import android.util.Log;
+
+
+/**
+ * An {@link ImsQuery} for accessing IMS WFC enabled settings from user
+ */
+public class ImsQueryWfcUserSetting implements ImsQuery {
+
+    private static final String LOG_TAG = "QueryWfcUserSetting";
+
+    /**
+     * Constructor
+     * @param subId subscription id
+     */
+    public ImsQueryWfcUserSetting(int subId) {
+        mSubId = subId;
+    }
+
+    private volatile int mSubId;
+
+    /**
+     * Implementation of interface {@link ImsQuery#query()}
+     *
+     * @return result of query
+     */
+    public boolean query() {
+        try {
+            final ImsMmTelManager imsMmTelManager =
+                    ImsMmTelManager.createForSubscriptionId(mSubId);
+            return imsMmTelManager.isVoWiFiSettingEnabled();
+        } catch (IllegalArgumentException exception) {
+            Log.w(LOG_TAG, "fail to get Wfc settings. subId=" + mSubId, exception);
+        }
+        return false;
+    }
+}

src/com/android/settings/network/ims/IntegerConsumer.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2020 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 com.android.settings.network.ims;
+
+import java.util.concurrent.Semaphore;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.Consumer;
+
+class IntegerConsumer extends Semaphore implements Consumer<Integer> {
+
+    private static final String TAG = "IntegerConsumer";
+
+    IntegerConsumer() {
+        super(0);
+        mValue = new AtomicInteger();
+    }
+
+    private volatile AtomicInteger mValue;
+
+    /**
+     * Get boolean value reported from callback
+     *
+     * @param timeout callback waiting time in milliseconds
+     * @return int value reported
+     * @throws InterruptedException when thread get interrupted
+     */
+    int get(long timeout) throws InterruptedException {
+        tryAcquire(timeout, TimeUnit.MILLISECONDS);
+        return mValue.get();
+    }
+
+    /**
+     * Implementation of {@link Consumer#accept(Integer)}
+     *
+     * @param value int reported from {@link Consumer#accept(Integer)}
+     */
+    public void accept(Integer value) {
+        if (value != null) {
+            mValue.set(value.intValue());
+        }
+        release();
+    }
+}

src/com/android/settings/network/ims/VolteQueryImsState.java

@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) 2020 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 com.android.settings.network.ims;
+
+import android.content.Context;
+import android.telecom.TelecomManager;
+import android.telephony.AccessNetworkConstants;
+import android.telephony.SubscriptionManager;
+import android.telephony.ims.ImsException;
+import android.telephony.ims.feature.MmTelFeature;
+import android.telephony.ims.stub.ImsRegistrationImplBase;
+import android.util.Log;
+
+import androidx.annotation.VisibleForTesting;
+
+/**
+ * Controller class for querying Volte status
+ */
+public class VolteQueryImsState extends ImsQueryController {
+
+    private static final String LOG_TAG = "VolteQueryImsState";
+
+    private Context mContext;
+    private int mSubId;
+
+    /**
+     * Constructor
+     *
+     * @param context {@link Context}
+     * @param subId subscription's id
+     */
+    public VolteQueryImsState(Context context, int subId) {
+        super(MmTelFeature.MmTelCapabilities.CAPABILITY_TYPE_VOICE,
+                ImsRegistrationImplBase.REGISTRATION_TECH_LTE,
+                AccessNetworkConstants.TRANSPORT_TYPE_WWAN);
+        mContext = context;
+        mSubId = subId;
+    }
+
+    /**
+     * Implementation of ImsQueryController#isEnabledByUser(int subId)
+     */
+    @VisibleForTesting
+    boolean isEnabledByUser(int subId) {
+        if (!SubscriptionManager.isValidSubscriptionId(subId)) {
+            return false;
+        }
+        return (new ImsQueryEnhanced4gLteModeUserSetting(subId)).query();
+    }
+
+    /**
+     * Check whether VoLTE has been provisioned or not on this subscription
+     *
+     * @return true when VoLTE has been enabled, otherwise false
+     */
+    public boolean isVoLteProvisioned() {
+        if (!SubscriptionManager.isValidSubscriptionId(mSubId)) {
+            return false;
+        }
+        if (!isProvisionedOnDevice(mSubId)) {
+            return false;
+        }
+        try {
+            return isEnabledByPlatform(mSubId);
+        } catch (InterruptedException | IllegalArgumentException | ImsException exception) {
+            Log.w(LOG_TAG, "fail to get VoLte supporting status. subId=" + mSubId, exception);
+        }
+        return false;
+    }
+
+    /**
+     * Check whether VoLTE can be perform or not on this subscription
+     *
+     * @return true when VoLTE can be performed, otherwise false
+     */
+    public boolean isReadyToVoLte() {
+        if (!SubscriptionManager.isValidSubscriptionId(mSubId)) {
+            return false;
+        }
+        if (!isVoLteProvisioned()) {
+            return false;
+        }
+        try {
+            return isServiceStateReady(mSubId);
+        } catch (InterruptedException | IllegalArgumentException | ImsException exception) {
+            Log.w(LOG_TAG, "fail to get VoLte service status. subId=" + mSubId, exception);
+        }
+        return false;
+    }
+
+    /**
+     * Get allowance status for user to alter configuration
+     *
+     * @return true when changing configuration by user is allowed.
+     */
+    public boolean isAllowUserControl() {
+        if (!SubscriptionManager.isValidSubscriptionId(mSubId)) {
+            return false;
+        }
+
+        return ((!isTtyEnabled(mContext))
+                || (isTtyOnVolteEnabled(mSubId)));
+    }
+
+    @VisibleForTesting
+    boolean isTtyEnabled(Context context) {
+        final TelecomManager telecomManager = context.getSystemService(TelecomManager.class);
+        return (telecomManager.getCurrentTtyMode() != TelecomManager.TTY_MODE_OFF);
+    }
+
+    /**
+     * Get user's configuration
+     *
+     * @return true when user's configuration is ON otherwise false.
+     */
+    public boolean isEnabledByUser() {
+        if (!SubscriptionManager.isValidSubscriptionId(mSubId)) {
+            return false;
+        }
+        return isEnabledByUser(mSubId);
+    }
+}

src/com/android/settings/network/ims/VtQueryImsState.java

@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2020 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 com.android.settings.network.ims;
+
+import android.content.Context;
+import android.telecom.TelecomManager;
+import android.telephony.AccessNetworkConstants;
+import android.telephony.SubscriptionManager;
+import android.telephony.ims.ImsException;
+import android.telephony.ims.feature.MmTelFeature;
+import android.telephony.ims.stub.ImsRegistrationImplBase;
+import android.util.Log;
+
+import androidx.annotation.VisibleForTesting;
+
+/**
+ * Controller class for querying VT status
+ */
+public class VtQueryImsState extends ImsQueryController {
+
+    private static final String LOG_TAG = "VtQueryImsState";
+
+    private Context mContext;
+    private int mSubId;
+
+    /**
+     * Constructor
+     *
+     * @param context {@link Context}
+     * @param subId subscription's id
+     */
+    public VtQueryImsState(Context context, int subId) {
+        super(MmTelFeature.MmTelCapabilities.CAPABILITY_TYPE_VIDEO,
+                ImsRegistrationImplBase.REGISTRATION_TECH_LTE,
+                AccessNetworkConstants.TRANSPORT_TYPE_WWAN);
+        mContext = context;
+        mSubId = subId;
+    }
+
+    /**
+     * Implementation of ImsQueryController#isEnabledByUser(int subId)
+     */
+    @VisibleForTesting
+    boolean isEnabledByUser(int subId) {
+        if (!SubscriptionManager.isValidSubscriptionId(subId)) {
+            return false;
+        }
+        return (new ImsQueryVtUserSetting(subId)).query();
+    }
+
+    /**
+     * Check whether Video Call can be perform or not on this subscription
+     *
+     * @return true when Video Call can be performed, otherwise false
+     */
+    public boolean isReadyToVideoCall() {
+        if (!isProvisionedOnDevice(mSubId)) {
+            return false;
+        }
+
+        try {
+            return isEnabledByPlatform(mSubId) && isServiceStateReady(mSubId);
+        } catch (InterruptedException | IllegalArgumentException | ImsException exception) {
+            Log.w(LOG_TAG, "fail to get Vt ready. subId=" + mSubId, exception);
+        }
+        return false;
+    }
+
+    /**
+     * Get allowance status for user to alter configuration
+     *
+     * @return true when changing configuration by user is allowed.
+     */
+    public boolean isAllowUserControl() {
+        if (!SubscriptionManager.isValidSubscriptionId(mSubId)) {
+            return false;
+        }
+        return ((!isTtyEnabled(mContext))
+                || (isTtyOnVolteEnabled(mSubId)));
+    }
+
+    @VisibleForTesting
+    boolean isTtyEnabled(Context context) {
+        final TelecomManager telecomManager = context.getSystemService(TelecomManager.class);
+        return (telecomManager.getCurrentTtyMode() != TelecomManager.TTY_MODE_OFF);
+    }
+
+    /**
+     * Get user's configuration
+     *
+     * @return true when user's configuration is ON otherwise false.
+     */
+    public boolean isEnabledByUser() {
+        if (!SubscriptionManager.isValidSubscriptionId(mSubId)) {
+            return false;
+        }
+        return isEnabledByUser(mSubId);
+    }
+}

src/com/android/settings/network/ims/WifiCallingQueryImsState.java

@@ -0,0 +1,142 @@
+/*
+ * Copyright (C) 2020 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 com.android.settings.network.ims;
+
+import android.content.Context;
+import android.telecom.TelecomManager;
+import android.telephony.AccessNetworkConstants;
+import android.telephony.SubscriptionManager;
+import android.telephony.ims.ImsException;
+import android.telephony.ims.feature.MmTelFeature;
+import android.telephony.ims.stub.ImsRegistrationImplBase;
+import android.util.Log;
+
+import androidx.annotation.VisibleForTesting;
+
+/**
+ * Controller class for querying Wifi calling status
+ */
+public class WifiCallingQueryImsState extends ImsQueryController  {
+
+    private static final String LOG_TAG = "WifiCallingQueryImsState";
+
+    private Context mContext;
+    private int mSubId;
+
+    /**
+     * Constructor
+     *
+     * @param context {@link Context}
+     * @param subId subscription's id
+     */
+    public WifiCallingQueryImsState(Context context, int subId) {
+        super(MmTelFeature.MmTelCapabilities.CAPABILITY_TYPE_VOICE,
+                ImsRegistrationImplBase.REGISTRATION_TECH_IWLAN,
+                AccessNetworkConstants.TRANSPORT_TYPE_WLAN);
+        mContext = context;
+        mSubId = subId;
+    }
+
+    /**
+     * Implementation of ImsQueryController#isEnabledByUser(int subId)
+     */
+    @VisibleForTesting
+    boolean isEnabledByUser(int subId) {
+        if (!SubscriptionManager.isValidSubscriptionId(subId)) {
+            return false;
+        }
+        return (new ImsQueryWfcUserSetting(subId)).query();
+    }
+
+    /**
+     * Check whether Wifi Calling is a supported feature on this subscription
+     *
+     * @return true when Wifi Calling is a supported feature, otherwise false
+     */
+    public boolean isWifiCallingSupported() {
+        if (!SubscriptionManager.isValidSubscriptionId(mSubId)) {
+            return false;
+        }
+        try {
+            return isEnabledByPlatform(mSubId);
+        } catch (InterruptedException | IllegalArgumentException | ImsException exception) {
+            Log.w(LOG_TAG, "fail to get WFC supporting status. subId=" + mSubId, exception);
+        }
+        return false;
+    }
+
+    /**
+     * Check whether Wifi Calling has been provisioned or not on this subscription
+     *
+     * @return true when Wifi Calling has been enabled, otherwise false
+     */
+    public boolean isWifiCallingProvisioned() {
+        return isWifiCallingSupported() && isProvisionedOnDevice(mSubId);
+    }
+
+    /**
+     * Check whether Wifi Calling can be perform or not on this subscription
+     *
+     * @return true when Wifi Calling can be performed, otherwise false
+     */
+    public boolean isReadyToWifiCalling() {
+        if (!SubscriptionManager.isValidSubscriptionId(mSubId)) {
+            return false;
+        }
+        if (!isWifiCallingProvisioned()) {
+            return false;
+        }
+        try {
+            return isServiceStateReady(mSubId);
+        } catch (InterruptedException | IllegalArgumentException | ImsException exception) {
+            Log.w(LOG_TAG, "fail to get WFC service status. subId=" + mSubId, exception);
+        }
+        return false;
+    }
+
+    /**
+     * Get allowance status for user to alter configuration
+     *
+     * @return true when changing configuration by user is allowed.
+     */
+    public boolean isAllowUserControl() {
+        if (!SubscriptionManager.isValidSubscriptionId(mSubId)) {
+            return false;
+        }
+
+        return ((!isTtyEnabled(mContext))
+                || (isTtyOnVolteEnabled(mSubId)));
+    }
+
+    @VisibleForTesting
+    boolean isTtyEnabled(Context context) {
+        final TelecomManager telecomManager = context.getSystemService(TelecomManager.class);
+        return (telecomManager.getCurrentTtyMode() != TelecomManager.TTY_MODE_OFF);
+    }
+
+    /**
+     * Get user's configuration
+     *
+     * @return true when user's configuration is ON otherwise false.
+     */
+    public boolean isEnabledByUser() {
+        if (!SubscriptionManager.isValidSubscriptionId(mSubId)) {
+            return false;
+        }
+        return isEnabledByUser(mSubId);
+    }
+}

tests/robotests/src/com/android/settings/network/ims/MockVolteQueryImsState.java

@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2020 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 com.android.settings.network.ims;
+
+import android.content.Context;
+import android.telephony.ims.ImsException;
+
+/**
+ * Controller class for mock VoLte status
+ */
+public class MockVolteQueryImsState extends VolteQueryImsState {
+
+    private Boolean mIsTtyOnVolteEnabled;
+    private Boolean mIsSupported;
+    private Boolean mIsProvisionedOnDevice;
+    private Boolean mIsServiceStateReady;
+    private Boolean mIsEnabledByUser;
+
+    /**
+     * Constructor
+     *
+     * @param context {@link Context}
+     * @param subId subscription's id
+     */
+    public MockVolteQueryImsState(Context context, int subId) {
+        super(context, subId);
+    }
+
+    public void setIsTtyOnVolteEnabled(boolean enabled) {
+        mIsTtyOnVolteEnabled = enabled;
+    }
+
+    @Override
+    boolean isTtyOnVolteEnabled(int subId) {
+        if (mIsTtyOnVolteEnabled != null) {
+            return mIsTtyOnVolteEnabled;
+        }
+        return super.isTtyOnVolteEnabled(subId);
+    }
+
+    public void setEnabledByPlatform(boolean isSupported) {
+        mIsSupported = isSupported;
+    }
+
+    @Override
+    boolean isEnabledByPlatform(int subId) throws InterruptedException, ImsException,
+            IllegalArgumentException {
+        if (mIsSupported != null) {
+            return mIsSupported;
+        }
+        return super.isEnabledByPlatform(subId);
+    }
+
+    public void setIsProvisionedOnDevice(boolean isProvisioned) {
+        mIsProvisionedOnDevice = isProvisioned;
+    }
+
+    @Override
+    boolean isProvisionedOnDevice(int subId) {
+        if (mIsProvisionedOnDevice != null) {
+            return mIsProvisionedOnDevice;
+        }
+        return super.isProvisionedOnDevice(subId);
+    }
+
+    public void setServiceStateReady(boolean isReady) {
+        mIsServiceStateReady = isReady;
+    }
+
+    @Override
+    boolean isServiceStateReady(int subId) throws InterruptedException, ImsException,
+            IllegalArgumentException {
+        if (mIsServiceStateReady != null) {
+            return mIsServiceStateReady;
+        }
+        return super.isServiceStateReady(subId);
+    }
+
+    public void setIsEnabledByUser(boolean enabled) {
+        mIsEnabledByUser = enabled;
+    }
+
+    @Override
+    boolean isEnabledByUser(int subId) {
+        if (mIsEnabledByUser != null) {
+            return mIsEnabledByUser;
+        }
+        return super.isEnabledByUser(subId);
+    }
+
+}

tests/robotests/src/com/android/settings/network/ims/MockVtQueryImsState.java

@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2020 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 com.android.settings.network.ims;
+
+import android.content.Context;
+import android.telephony.ims.ImsException;
+
+/**
+ * Controller class for mock VT status
+ */
+public class MockVtQueryImsState extends VtQueryImsState {
+
+    private Boolean mIsTtyOnVolteEnabled;
+    private Boolean mIsEnabledOnPlatform;
+    private Boolean mIsProvisionedOnDevice;
+    private Boolean mIsEnabledByUser;
+    private Boolean mIsServiceStateReady;
+
+    /**
+     * Constructor
+     *
+     * @param context {@link Context}
+     * @param subId subscription's id
+     */
+    public MockVtQueryImsState(Context context, int subId) {
+        super(context, subId);
+    }
+
+    public void setIsTtyOnVolteEnabled(boolean enabled) {
+        mIsTtyOnVolteEnabled = enabled;
+    }
+
+    @Override
+    boolean isTtyOnVolteEnabled(int subId) {
+        if (mIsTtyOnVolteEnabled != null) {
+            return mIsTtyOnVolteEnabled;
+        }
+        return super.isTtyOnVolteEnabled(subId);
+    }
+
+    public void setIsEnabledByPlatform(boolean isEnabled) {
+        mIsEnabledOnPlatform = isEnabled;
+    }
+
+    @Override
+    boolean isEnabledByPlatform(int subId) throws InterruptedException, ImsException,
+            IllegalArgumentException {
+        if (mIsEnabledOnPlatform != null) {
+            return mIsEnabledOnPlatform;
+        }
+        return super.isEnabledByPlatform(subId);
+    }
+
+    public void setIsProvisionedOnDevice(boolean isProvisioned) {
+        mIsProvisionedOnDevice = isProvisioned;
+    }
+
+    @Override
+    boolean isProvisionedOnDevice(int subId) {
+        if (mIsProvisionedOnDevice != null) {
+            return mIsProvisionedOnDevice;
+        }
+        return super.isProvisionedOnDevice(subId);
+    }
+
+    public void setServiceStateReady(boolean isReady) {
+        mIsServiceStateReady = isReady;
+    }
+
+    @Override
+    boolean isServiceStateReady(int subId) throws InterruptedException, ImsException,
+            IllegalArgumentException {
+        if (mIsServiceStateReady != null) {
+            return mIsServiceStateReady;
+        }
+        return super.isServiceStateReady(subId);
+    }
+
+    public void setIsEnabledByUser(boolean enabled) {
+        mIsEnabledByUser = enabled;
+    }
+
+    @Override
+    boolean isEnabledByUser(int subId) {
+        if (mIsEnabledByUser != null) {
+            return mIsEnabledByUser;
+        }
+        return super.isEnabledByUser(subId);
+    }
+}

tests/robotests/src/com/android/settings/network/ims/MockWifiCallingQueryImsState.java

@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2020 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 com.android.settings.network.ims;
+
+import android.content.Context;
+import android.telephony.ims.ImsException;
+
+/**
+ * Controller class for mock Wifi calling status
+ */
+public class MockWifiCallingQueryImsState extends WifiCallingQueryImsState {
+
+    private Boolean mIsTtyOnVolteEnabled;
+    private Boolean mIsEnabledOnPlatform;
+    private Boolean mIsProvisionedOnDevice;
+    private Boolean mIsServiceStateReady;
+    private Boolean mIsEnabledByUser;
+
+    /**
+     * Constructor
+     *
+     * @param context {@code Context}
+     * @param subId subscription's id
+     */
+    public MockWifiCallingQueryImsState(Context context, int subId) {
+        super(context, subId);
+    }
+
+    public void setIsTtyOnVolteEnabled(boolean enabled) {
+        mIsTtyOnVolteEnabled = enabled;
+    }
+
+    @Override
+    boolean isTtyOnVolteEnabled(int subId) {
+        if (mIsTtyOnVolteEnabled != null) {
+            return mIsTtyOnVolteEnabled;
+        }
+        return super.isTtyOnVolteEnabled(subId);
+    }
+
+
+    public void setIsEnabledByPlatform(boolean isEnabled) {
+        mIsEnabledOnPlatform = isEnabled;
+    }
+
+    @Override
+    boolean isEnabledByPlatform(int subId) throws InterruptedException, ImsException,
+            IllegalArgumentException {
+        if (mIsEnabledOnPlatform != null) {
+            return mIsEnabledOnPlatform;
+        }
+        return super.isEnabledByPlatform(subId);
+    }
+
+    public void setIsProvisionedOnDevice(boolean isProvisioned) {
+        mIsProvisionedOnDevice = isProvisioned;
+    }
+
+    @Override
+    boolean isProvisionedOnDevice(int subId) {
+        if (mIsProvisionedOnDevice != null) {
+            return mIsProvisionedOnDevice;
+        }
+        return super.isProvisionedOnDevice(subId);
+    }
+
+    public void setServiceStateReady(boolean isReady) {
+        mIsServiceStateReady = isReady;
+    }
+
+    @Override
+    boolean isServiceStateReady(int subId) throws InterruptedException, ImsException,
+            IllegalArgumentException {
+        if (mIsServiceStateReady != null) {
+            return mIsServiceStateReady;
+        }
+        return super.isServiceStateReady(subId);
+    }
+
+    public void setIsEnabledByUser(boolean enabled) {
+        mIsEnabledByUser = enabled;
+    }
+
+    @Override
+    boolean isEnabledByUser(int subId) {
+        if (mIsEnabledByUser != null) {
+            return mIsEnabledByUser;
+        }
+        return super.isEnabledByUser(subId);
+    }
+
+}