Add Secure NFC functionality (5bf4e1ec) · Commits · e / os / android_packages_apps_Settings

res/values/strings.xml

+6 −1

Original line number	Diff line number	Diff line
		@@ -1859,6 +1859,11 @@
		<!-- Dialog content for NFC disclaimer: telling user NFC can exchange data when device is nearby other devices (for example: payment terminals, badge reader etc). [CHAR_LIMIT=NONE]-->
		<string name="nfc_disclaimer_content">NFC exchanges data between this device and other nearby devices or targets, such as payment terminals, access readers, and interactive ads or tags.</string>

		<!-- Used in the settings screen to secure NFC [CHAR LIMIT=NONE] -->
		<string name="nfc_secure_settings_title">Secure NFC</string>
		<!-- Description of Secure NFC in the 1st level settings screen. [CHAR LIMIT=NONE] -->
		<string name="nfc_secure_toggle_summary" product="default">Allow NFC Payment and Transit use only when screen is unlocked</string>

		<!-- Used to enter the Android Beam sharing preferences screen. This phrase is a trademark. [CHAR LIMIT=32] -->
		<string name="android_beam_settings_title">Android Beam</string>
		<!-- Used to describe the on state of the Android Beam feature [CHAR LIMIT=NONE] -->
		@@ -1866,7 +1871,7 @@
		<!-- Used to describe the off state of the Android Beam feature [CHAR LIMIT=NONE] -->
		<string name="android_beam_off_summary">Off</string>
		<!-- Used to describe the enabled state of the Android Beam feature when NFC, which it relies on, is turned off [CHAR LIMIT=NONE] -->
		<string name="android_beam_disabled_summary">Unavailable because NFC is turned off</string>
		<string name="nfc_disabled_summary">Unavailable because NFC is turned off</string>
		<!-- Used in the Android Beam sharing preferences screen. This phrase is a trademark. [CHAR LIMIT=32] -->
		<string name="android_beam_label">Android Beam</string>
		<!-- Explanation of the Android Beam feature in the Android Beam settings panel. The use of "beam" here is as a verb and not considered trademarked. [CHAR LIMIT=NONE] -->

res/xml/connected_devices_advanced.xml

+8 −0

Original line number	Diff line number	Diff line
		@@ -44,6 +44,14 @@
		android:icon="@drawable/ic_android"
		android:order="-6"/>

		<SwitchPreference
		android:key="nfc_secure_settings"
		android:title="@string/nfc_secure_settings_title"
		settings:controller="com.android.settings.nfc.SecureNfcPreferenceController"
		android:icon="@drawable/ic_nfc"
		android:summary="@string/nfc_secure_toggle_summary"
		android:order="-7"/>

		<com.android.settingslib.RestrictedPreference
		android:key="connected_device_printing"
		android:title="@string/print_settings"

src/com/android/settings/nfc/AndroidBeamEnabler.java

+1 −1

Original line number	Diff line number	Diff line
		@@ -53,7 +53,7 @@ public class AndroidBeamEnabler extends BaseNfcEnabler {
		switch (newState) {
		case NfcAdapter.STATE_OFF:
		mPreference.setEnabled(false);
		mPreference.setSummary(R.string.android_beam_disabled_summary);
		mPreference.setSummary(R.string.nfc_disabled_summary);
		break;
		case NfcAdapter.STATE_ON:
		if (mBeamDisallowedBySystem) {

src/com/android/settings/nfc/SecureNfcEnabler.java

0 → 100644

+60 −0

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		/*
		* Copyright (C) 2019 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.nfc;

		import android.content.Context;
		import android.nfc.NfcAdapter;
		import android.provider.Settings;

		import androidx.annotation.VisibleForTesting;
		import androidx.preference.SwitchPreference;

		import com.android.settings.R;

		/**
		* SecureNfcEnabler is a helper to manage the Secure Nfc on/off checkbox preference
		* It turns on/off Secure NFC and ensures the summary of the preference reflects
		* the current state.
		*/
		public class SecureNfcEnabler extends BaseNfcEnabler {
		private final SwitchPreference mPreference;

		public SecureNfcEnabler(Context context, SwitchPreference preference) {
		super(context);
		mPreference = preference;
		}

		@Override
		protected void handleNfcStateChanged(int newState) {
		switch (newState) {
		case NfcAdapter.STATE_OFF:
		mPreference.setSummary(R.string.nfc_disabled_summary);
		mPreference.setEnabled(false);
		break;
		case NfcAdapter.STATE_ON:
		mPreference.setChecked(mPreference.isEnabled());
		mPreference.setEnabled(true);
		break;
		case NfcAdapter.STATE_TURNING_ON:
		mPreference.setEnabled(false);
		break;
		case NfcAdapter.STATE_TURNING_OFF:
		mPreference.setEnabled(false);
		break;
		}
		}
		}

src/com/android/settings/nfc/SecureNfcPreferenceController.java

0 → 100644

+99 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2019 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.nfc;

		import android.content.Context;
		import android.nfc.NfcAdapter;
		import android.os.SystemProperties;

		import androidx.preference.PreferenceScreen;
		import androidx.preference.SwitchPreference;

		import com.android.settings.core.TogglePreferenceController;
		import com.android.settingslib.core.lifecycle.LifecycleObserver;
		import com.android.settingslib.core.lifecycle.events.OnPause;
		import com.android.settingslib.core.lifecycle.events.OnResume;

		public class SecureNfcPreferenceController extends TogglePreferenceController
		implements LifecycleObserver, OnResume, OnPause {

		public static final String KEY_TOGGLE_NFC = "nfc_secure_setting";
		private final NfcAdapter mNfcAdapter;
		private SecureNfcEnabler mSecureNfcEnabler;

		public SecureNfcPreferenceController(Context context, String key) {
		super(context, key);
		mNfcAdapter = NfcAdapter.getDefaultAdapter(context);
		}

		@Override
		public void displayPreference(PreferenceScreen screen) {
		super.displayPreference(screen);
		if (!isAvailable()) {
		mSecureNfcEnabler = null;
		return;
		}

		final SwitchPreference switchPreference =
		(SwitchPreference) screen.findPreference(getPreferenceKey());

		mSecureNfcEnabler = new SecureNfcEnabler(mContext, switchPreference);
		}

		@Override
		public boolean isChecked() {
		return mNfcAdapter.isNfcSecureEnabled();
		}

		@Override
		public boolean setChecked(boolean isChecked) {
		return mNfcAdapter.setNfcSecure(isChecked);
		}

		@Override
		@AvailabilityStatus
		public int getAvailabilityStatus() {
		if (mNfcAdapter == null) {
		return UNSUPPORTED_ON_DEVICE;
		}
		return mNfcAdapter.deviceSupportsNfcSecure() ? AVAILABLE
		: UNSUPPORTED_ON_DEVICE;
		}

		@Override
		public boolean hasAsyncUpdate() {
		return true;
		}

		@Override
		public boolean isSliceable() {
		return true;
		}

		@Override
		public void onResume() {
		if (mSecureNfcEnabler != null) {
		mSecureNfcEnabler.resume();
		}
		}

		@Override
		public void onPause() {
		if (mSecureNfcEnabler != null) {
		mSecureNfcEnabler.pause();
		}
		}
		}