1 files changed, 206 insertions, 0 deletions
diff --git a/src/com/android/settings/development/gup/GupPreferenceController.java b/src/com/android/settings/development/gup/GupPreferenceController.java
new file mode 100644
index 0000000000..762314474e
--- /dev/null
+++ b/src/com/android/settings/development/gup/GupPreferenceController.java
@@ -0,0 +1,206 @@
+/*
+ * Copyright 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.development.gup;
+
+import android.content.ContentResolver;
+import android.content.Context;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.content.res.Resources;
+import android.provider.Settings;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.preference.ListPreference;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceGroup;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.R;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settingslib.development.DevelopmentSettingsEnabler;
+
+import java.text.Collator;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+public class GupPreferenceController
+        extends BasePreferenceController implements Preference.OnPreferenceChangeListener {
+    private final CharSequence[] mEntryList;
+    private final String mPreferenceTitle;
+    private final String mPreferenceDefault;
+    private final String mPreferenceGup;
+    private final String mPreferenceNative;
+
+    private final List<AppInfo> mAppInfos;
+    private final Set<String> mDevOptInApps;
+    private final Set<String> mDevOptOutApps;
+
+    public GupPreferenceController(Context context, String key) {
+        super(context, key);
+
+        final Resources resources = context.getResources();
+        mEntryList = resources.getStringArray(R.array.gup_app_preference_values);
+        mPreferenceTitle = resources.getString(R.string.gup_app_preference_title);
+        mPreferenceDefault = resources.getString(R.string.gup_app_preference_default);
+        mPreferenceGup = resources.getString(R.string.gup_app_preference_gup);
+        mPreferenceNative = resources.getString(R.string.gup_app_preference_native);
+
+        // TODO: Move this task to background if there's potential ANR/Jank.
+        // Update the UI when all the app infos are ready.
+        mAppInfos = getAppInfos(context);
+
+        final ContentResolver contentResolver = context.getContentResolver();
+        mDevOptInApps =
+                getGlobalSettingsString(contentResolver, Settings.Global.GUP_DEV_OPT_IN_APPS);
+        mDevOptOutApps =
+                getGlobalSettingsString(contentResolver, Settings.Global.GUP_DEV_OPT_OUT_APPS);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return DevelopmentSettingsEnabler.isDevelopmentSettingsEnabled(mContext)
+                ? AVAILABLE
+                : DISABLED_DEPENDENT_SETTING;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        final PreferenceGroup preferenceGroup =
+                (PreferenceGroup) screen.findPreference(getPreferenceKey());
+        if (preferenceGroup == null) {
+            return;
+        }
+
+        for (AppInfo appInfo : mAppInfos) {
+            preferenceGroup.addPreference(
+                    createListPreference(appInfo.info.packageName, appInfo.label));
+        }
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        final ListPreference listPref = (ListPreference) preference;
+        final String value = newValue.toString();
+        final String packageName = preference.getKey();
+
+        // When user choose a new preference, update both Sets for
+        // opt-in and opt-out apps. Then set the new summary text.
+        if (value.equals(mPreferenceNative)) {
+            mDevOptInApps.remove(packageName);
+            mDevOptOutApps.add(packageName);
+            listPref.setSummary(mPreferenceNative);
+        } else if (value.equals(mPreferenceGup)) {
+            mDevOptInApps.add(packageName);
+            mDevOptOutApps.remove(packageName);
+            listPref.setSummary(mPreferenceGup);
+        } else {
+            mDevOptInApps.remove(packageName);
+            mDevOptOutApps.remove(packageName);
+            listPref.setSummary(mPreferenceDefault);
+        }
+
+        // Push the updated Sets for opt-in and opt-out apps to
+        // corresponding Settings.Global.GUP_DEV_OPT_(IN|OUT)_APPS
+        Settings.Global.putString(mContext.getContentResolver(),
+                Settings.Global.GUP_DEV_OPT_IN_APPS, String.join(",", mDevOptInApps));
+        Settings.Global.putString(mContext.getContentResolver(),
+                Settings.Global.GUP_DEV_OPT_OUT_APPS, String.join(",", mDevOptOutApps));
+
+        return true;
+    }
+
+    // AppInfo class to achieve loading the application label only once
+    class AppInfo {
+        AppInfo(PackageManager packageManager, ApplicationInfo applicationInfo) {
+            info = applicationInfo;
+            label = packageManager.getApplicationLabel(applicationInfo).toString();
+        }
+        final ApplicationInfo info;
+        final String label;
+    }
+
+    // List of non-system packages that are installed for the current user.
+    private List<AppInfo> getAppInfos(Context context) {
+        final PackageManager packageManager = context.getPackageManager();
+        final List<ApplicationInfo> applicationInfos =
+                packageManager.getInstalledApplications(0 /* flags */);
+
+        final List<AppInfo> appInfos = new ArrayList<>();
+        for (ApplicationInfo applicationInfo : applicationInfos) {
+            if ((applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) == 0) {
+                appInfos.add(new AppInfo(packageManager, applicationInfo));
+            }
+        }
+
+        Collections.sort(appInfos, appInfoComparator);
+
+        return appInfos;
+    }
+
+    // Parse the raw comma separated package names into a String Set
+    private Set<String> getGlobalSettingsString(ContentResolver contentResolver, String name) {
+        final String settingsValue = Settings.Global.getString(contentResolver, name);
+        if (settingsValue == null) {
+            return new HashSet<>();
+        }
+
+        final Set<String> valueSet = new HashSet<>(Arrays.asList(settingsValue.split(",")));
+        valueSet.remove("");
+
+        return valueSet;
+    }
+
+    private final Comparator<AppInfo> appInfoComparator = new Comparator<AppInfo>() {
+        public final int compare(AppInfo a, AppInfo b) {
+            return Collator.getInstance().compare(a.label, b.label);
+        }
+    };
+
+    @VisibleForTesting
+    protected ListPreference createListPreference(String packageName, String appName) {
+        final ListPreference listPreference = new ListPreference(mContext);
+
+        listPreference.setKey(packageName);
+        listPreference.setTitle(appName);
+        listPreference.setDialogTitle(mPreferenceTitle);
+        listPreference.setEntries(mEntryList);
+        listPreference.setEntryValues(mEntryList);
+
+        // Initialize preference default and summary with the opt in/out choices
+        // from Settings.Global.GUP_DEV_OPT_(IN|OUT)_APPS
+        if (mDevOptOutApps.contains(packageName)) {
+            listPreference.setValue(mPreferenceNative);
+            listPreference.setSummary(mPreferenceNative);
+        } else if (mDevOptInApps.contains(packageName)) {
+            listPreference.setValue(mPreferenceGup);
+            listPreference.setSummary(mPreferenceGup);
+        } else {
+            listPreference.setValue(mPreferenceDefault);
+            listPreference.setSummary(mPreferenceDefault);
+        }
+
+        listPreference.setOnPreferenceChangeListener(this);
+
+        return listPreference;
+    }
+}