[VoNR] VoNR settings

Allow user to enable or disable voice over NR.

Bug: 191203577
Test: atest
com.android.settings.network.telephony.NrAdvancedCallingPreferenceControllerTest

Change-Id: I9be4716d0cdac5d698c2058be65bfa541495d012

src/com/android/settings/network/telephony/MobileNetworkSettings.java

@@ -193,6 +193,7 @@ public class MobileNetworkSettings extends AbstractMobileNetworkSettings {
                 .addListener(videoCallingPreferenceController);
         use(ContactDiscoveryPreferenceController.class).init(getParentFragmentManager(), mSubId,
                 getLifecycle());
+        use(NrAdvancedCallingPreferenceController.class).init(mSubId);
     }
 
     @Override

src/com/android/settings/network/telephony/NrAdvancedCallingPreferenceController.java

@@ -0,0 +1,197 @@
+/*
+ * 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 com.android.settings.network.telephony;
+
+import android.content.Context;
+import android.os.PersistableBundle;
+import android.telephony.CarrierConfigManager;
+import android.telephony.SubscriptionManager;
+import android.telephony.TelephonyCallback;
+import android.telephony.TelephonyManager;
+import android.util.Log;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+import androidx.preference.SwitchPreference;
+
+import com.android.internal.telephony.util.ArrayUtils;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
+import com.android.settingslib.core.lifecycle.events.OnStart;
+import com.android.settingslib.core.lifecycle.events.OnStop;
+
+/**
+ * Preference controller for "Enhanced 4G LTE"
+ */
+public class NrAdvancedCallingPreferenceController extends TelephonyTogglePreferenceController
+        implements LifecycleObserver, OnStart, OnStop {
+
+    private static final String TAG = "VoNrSettings";
+
+    @VisibleForTesting
+    Preference mPreference;
+    private TelephonyManager mTelephonyManager;
+    private PhoneCallStateTelephonyCallback mTelephonyCallback;
+    private boolean mIsVonrVisibleFromCarrierConfig = false;
+    private boolean mIsNrEnableFromCarrierConfig = false;
+    private boolean mHas5gCapability = false;
+    private Integer mCallState;
+
+    public NrAdvancedCallingPreferenceController(Context context, String key) {
+        super(context, key);
+        mTelephonyManager = context.getSystemService(TelephonyManager.class);
+    }
+
+    /**
+     * Initial this PreferenceController.
+     * @param subId The subscription Id.
+     * @return This PreferenceController.
+     */
+    public NrAdvancedCallingPreferenceController init(int subId) {
+        Log.d(TAG, "init: ");
+        if (mTelephonyCallback == null) {
+            mTelephonyCallback = new PhoneCallStateTelephonyCallback();
+        }
+
+        mSubId = subId;
+
+        if (mTelephonyManager == null) {
+            mTelephonyManager = mContext.getSystemService(TelephonyManager.class);
+        }
+        if (SubscriptionManager.isValidSubscriptionId(subId)) {
+            mTelephonyManager = mTelephonyManager.createForSubscriptionId(subId);
+        }
+        long supportedRadioBitmask = mTelephonyManager.getSupportedRadioAccessFamily();
+        mHas5gCapability =
+                (supportedRadioBitmask & TelephonyManager.NETWORK_TYPE_BITMASK_NR) > 0;
+
+        PersistableBundle carrierConfig = getCarrierConfigForSubId(subId);
+        if (carrierConfig == null) {
+            return this;
+        }
+        mIsVonrVisibleFromCarrierConfig = carrierConfig.getBoolean(
+                CarrierConfigManager.KEY_VONR_SETTING_VISIBILITY_BOOL);
+
+        int[] nrAvailabilities = carrierConfig.getIntArray(
+                CarrierConfigManager.KEY_CARRIER_NR_AVAILABILITIES_INT_ARRAY);
+        mIsNrEnableFromCarrierConfig = !ArrayUtils.isEmpty(nrAvailabilities);
+
+        Log.d(TAG, "mHas5gCapability: " + mHas5gCapability
+                + ",mIsNrEnabledFromCarrierConfig: " + mIsNrEnableFromCarrierConfig
+                + ",mIsVonrVisibleFromCarrierConfig: " + mIsVonrVisibleFromCarrierConfig);
+        return this;
+    }
+
+    @Override
+    public int getAvailabilityStatus(int subId) {
+        init(subId);
+
+        if (mHas5gCapability && mIsNrEnableFromCarrierConfig && mIsVonrVisibleFromCarrierConfig) {
+            return AVAILABLE;
+        }
+        return CONDITIONALLY_UNAVAILABLE;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreference = screen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public void onStart() {
+        if (mTelephonyCallback == null) {
+            return;
+        }
+        mTelephonyCallback.register(mTelephonyManager);
+    }
+
+    @Override
+    public void onStop() {
+        if (mTelephonyCallback == null) {
+            return;
+        }
+        mTelephonyCallback.unregister();
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+        if (preference == null) {
+            return;
+        }
+        final SwitchPreference switchPreference = (SwitchPreference) preference;
+        switchPreference.setEnabled(isUserControlAllowed());
+    }
+
+    @Override
+    public boolean setChecked(boolean isChecked) {
+        if (!SubscriptionManager.isValidSubscriptionId(mSubId)) {
+            return false;
+        }
+        Log.d(TAG, "setChecked: " + isChecked);
+        int result = mTelephonyManager.setVoNrEnabled(isChecked);
+        if (result == TelephonyManager.ENABLE_VONR_SUCCESS) {
+            return true;
+        }
+        Log.d(TAG, "Fail to set VoNR result= " + result + ". subId=" + mSubId);
+        return false;
+    }
+
+    @Override
+    public boolean isChecked() {
+        return mTelephonyManager.isVoNrEnabled();
+    }
+
+    @VisibleForTesting
+    protected boolean isCallStateIdle() {
+        return (mCallState != null) && (mCallState == TelephonyManager.CALL_STATE_IDLE);
+    }
+
+    private boolean isUserControlAllowed() {
+        return isCallStateIdle();
+    }
+
+    private class PhoneCallStateTelephonyCallback extends TelephonyCallback implements
+            TelephonyCallback.CallStateListener {
+
+        private TelephonyManager mLocalTelephonyManager;
+
+        @Override
+        public void onCallStateChanged(int state) {
+            mCallState = state;
+            updateState(mPreference);
+        }
+
+        public void register(TelephonyManager telephonyManager) {
+            mLocalTelephonyManager = telephonyManager;
+
+            // assign current call state so that it helps to show correct preference state even
+            // before first onCallStateChanged() by initial registration.
+            mCallState = mLocalTelephonyManager.getCallState();
+            mLocalTelephonyManager.registerTelephonyCallback(
+                    mContext.getMainExecutor(), mTelephonyCallback);
+        }
+
+        public void unregister() {
+            mCallState = null;
+            if (mLocalTelephonyManager != null) {
+                mLocalTelephonyManager.unregisterTelephonyCallback(this);
+            }
+        }
+    }
+}