Adding Nfc Tag App Preference setting to special_access settings

In the settings app, allow users to change the preference of the Nfc Tag apps.

Bug: 244272155
Test: make RunSettingsRoboTests ROBOTEST_FILTER=NfcTagAppsPreferenceControllerTest
Change-Id: I28903fae8935613a0e8618da21ca44e98b8801d5

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

@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) 2023 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 static com.android.settingslib.applications.ApplicationsState.AppEntry;
+import static com.android.settingslib.applications.ApplicationsState.AppFilter;
+
+import android.app.ActivityManager;
+import android.content.Context;
+import android.nfc.NfcAdapter;
+import android.os.UserHandle;
+import android.os.UserManager;
+import android.util.Log;
+
+import com.android.settings.applications.AppStateBaseBridge;
+import com.android.settingslib.applications.ApplicationsState;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Filter to display only in the Tag preference listed Apps on Nfc Tag Apps page.
+ */
+public class AppStateNfcTagAppsBridge extends AppStateBaseBridge{
+
+    private static final String TAG = "AppStateNfcTagAppsBridge";
+
+    private final Context mContext;
+    private final NfcAdapter mNfcAdapter;
+    // preference list cache
+    private static Map<Integer, Map<String, Boolean>> sList = new HashMap<>();
+
+    public AppStateNfcTagAppsBridge(Context context, ApplicationsState appState,
+            Callback callback) {
+        super(appState, callback);
+        mContext = context;
+        mNfcAdapter = NfcAdapter.getDefaultAdapter(mContext);
+        if (mNfcAdapter != null && mNfcAdapter.isTagIntentAppPreferenceSupported()) {
+            UserManager um = mContext.createContextAsUser(
+                    UserHandle.of(ActivityManager.getCurrentUser()), 0)
+                    .getSystemService(UserManager.class);
+            List<UserHandle> luh = um.getEnabledProfiles();
+            for (UserHandle uh : luh) {
+                int userId = uh.getIdentifier();
+                sList.put(userId, mNfcAdapter.getTagIntentAppPreferenceForUser(userId));
+            }
+        }
+    }
+
+    /**
+     * Update the system and cached tag app preference lists.
+     */
+    public boolean updateApplist(int userId, String pkg, boolean allowed) {
+        if (mNfcAdapter.setTagIntentAppPreferenceForUser(
+                userId, pkg, allowed) == NfcAdapter.TAG_INTENT_APP_PREF_RESULT_SUCCESS) {
+            sList.put(userId, mNfcAdapter.getTagIntentAppPreferenceForUser(userId));
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    @Override
+    protected void loadAllExtraInfo() {
+        final List<ApplicationsState.AppEntry> allApps = mAppSession.getAllApps();
+        for (int i = 0; i < allApps.size(); i++) {
+            ApplicationsState.AppEntry app = allApps.get(i);
+            this.updateExtraInfo(app, app.info.packageName, app.info.uid);
+        }
+    }
+
+    @Override
+    protected void updateExtraInfo(AppEntry app, String pkg, int uid) {
+        // Display package if is in the app preference list.
+        int userId = UserHandle.getUserId(uid);
+        Map<String, Boolean> map = sList.getOrDefault(userId, new HashMap<>());
+        if (map.containsKey(pkg)) {
+            app.extraInfo = new NfcTagAppState(/* exist */ true, /* allowed */ map.get(pkg));
+        } else {
+            app.extraInfo = new NfcTagAppState(/* exist */ false, /* allowed */ false);
+        }
+    }
+
+    /**
+     * Class to denote the nfc tag app preference state of the AppEntry
+     */
+    public static class NfcTagAppState {
+        private boolean mIsExisted;
+        private boolean mIsAllowed;
+
+        public NfcTagAppState(boolean exist, boolean allowed) {
+            mIsExisted = exist;
+            mIsAllowed = allowed;
+        }
+
+        public boolean isExisted() {
+            return mIsExisted;
+        }
+
+        public boolean isAllowed() {
+            return mIsAllowed;
+        }
+    }
+
+    public static final AppFilter FILTER_APPS_NFC_TAG =
+            new AppFilter() {
+                @Override
+                public void init() {
+                }
+
+                @Override
+                public boolean filterApp(AppEntry entry) {
+                    if (entry.extraInfo == null) {
+                        Log.d(TAG, "[" + entry.info.packageName + "]" + " has No extra info.");
+                        return false;
+                    }
+                    NfcTagAppState state = (NfcTagAppState) entry.extraInfo;
+                    return state.isExisted();
+                }
+            };
+}

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

@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2023 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.app.settings.SettingsEnums;
+import android.content.Context;
+import android.os.Bundle;
+import android.util.Log;
+
+import androidx.appcompat.app.AlertDialog;
+import androidx.preference.Preference;
+import androidx.preference.Preference.OnPreferenceChangeListener;
+import androidx.preference.SwitchPreference;
+
+import com.android.settings.R;
+import com.android.settings.applications.AppInfoWithHeader;
+import com.android.settings.nfc.AppStateNfcTagAppsBridge.NfcTagAppState;
+import com.android.settingslib.applications.ApplicationsState.AppEntry;
+
+/**
+ * Class for displaying app info of the Nfc Tag App
+ */
+public class ChangeNfcTagAppsStateDetails extends AppInfoWithHeader
+        implements OnPreferenceChangeListener {
+
+    private static final String KEY_APP_OPS_SETTINGS_SWITCH = "app_ops_settings_switch";
+    private static final String LOG_TAG = "ChangeNfcTagAppsStateDetails";
+
+    private AppStateNfcTagAppsBridge mAppBridge;
+    private SwitchPreference mSwitchPref;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        final Context context = getActivity();
+        mAppBridge = new AppStateNfcTagAppsBridge(context, mState, null);
+
+        // find preferences
+        addPreferencesFromResource(R.xml.change_nfc_tag_apps_details);
+        mSwitchPref = (SwitchPreference) findPreference(KEY_APP_OPS_SETTINGS_SWITCH);
+
+        // set title/summary for all of them
+        mSwitchPref.setTitle(R.string.change_nfc_tag_apps_detail_switch);
+
+        // install event listeners
+        mSwitchPref.setOnPreferenceChangeListener(this);
+
+    }
+
+    @Override
+    protected AlertDialog createDialog(int id, int errorCode) {
+        return null;
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        return SettingsEnums.CONFIG_NFC_TAG_APP_PREF;
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        Boolean enable = (Boolean) newValue;
+        if (preference == mSwitchPref) {
+            if (mAppBridge != null && mAppBridge.updateApplist(mUserId, mPackageName, enable)) {
+                refreshUi();
+                return true;
+            } else {
+                Log.e(LOG_TAG, "Set [" + mPackageName + "]" + " failed.");
+                return false;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    protected boolean refreshUi() {
+        if (mPackageInfo == null || mPackageInfo.applicationInfo == null) {
+            return false;
+        }
+        retrieveAppEntry();
+        NfcTagAppState state;
+        if (mAppEntry.extraInfo instanceof NfcTagAppState) {
+            state = (NfcTagAppState) mAppEntry.extraInfo;
+        } else {
+            state = new NfcTagAppState(/* exist */ false, /* allowed */ false);
+        }
+        mSwitchPref.setChecked(state.isAllowed());
+        mSwitchPref.setEnabled(state.isExisted());
+        return true;
+    }
+
+    /** Returns the summary string for this setting preference. */
+    public static CharSequence getSummary(Context context, AppEntry entry) {
+        NfcTagAppState state;
+        if (entry.extraInfo instanceof NfcTagAppState) {
+            state = (NfcTagAppState) entry.extraInfo;
+        } else {
+            state = new NfcTagAppState(/* exist */ false, /* allowed */ false);
+        }
+        return context.getString(state.isAllowed()
+                ? R.string.app_permission_summary_allowed
+                : R.string.app_permission_summary_not_allowed);
+    }
+}

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

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2023 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 com.android.settings.core.BasePreferenceController;
+
+/**
+ * A PreferenceController handling the logic for the Nfc Tag App preference
+ */
+public class NfcTagAppsPreferenceController extends BasePreferenceController {
+    private NfcAdapter mNfcAdapter;
+
+    public NfcTagAppsPreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+        mNfcAdapter = NfcAdapter.getDefaultAdapter(context.getApplicationContext());
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        if (mNfcAdapter != null) {
+            return mNfcAdapter.isTagIntentAppPreferenceSupported()
+                    ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
+        }
+        return UNSUPPORTED_ON_DEVICE;
+    }
+}