Add permissions screen to advanced apps

Add a screen that shows a list of permissions and how many apps
have been granted them, link to PackageInstaller for control of
the permissions.

Depends on I68cdbe53177f742daf396f4eb53761fd5cda2636
Change-Id: I183848ea89ea41a17eaf663441dc4ef963be99bf

src/com/android/settings/applications/ManagePermissions.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2015 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.applications;
+
+import android.content.ActivityNotFoundException;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.preference.Preference;
+import android.preference.Preference.OnPreferenceClickListener;
+import android.preference.PreferenceScreen;
+import android.util.Log;
+
+import com.android.internal.logging.MetricsLogger;
+import com.android.settings.R;
+import com.android.settings.SettingsPreferenceFragment;
+import com.android.settings.applications.PermissionsInfo.PermissionGroup;
+
+import java.util.List;
+
+public class ManagePermissions extends SettingsPreferenceFragment
+        implements PermissionsInfo.Callback, OnPreferenceClickListener {
+
+    private static final String TAG = "ManagePermissions";
+
+    private boolean mLoadComplete;
+    private PermissionsInfo mPermissionsInfo;
+
+    @Override
+    public void onResume() {
+        super.onResume();
+
+        mPermissionsInfo = new PermissionsInfo(getActivity(), this);
+    }
+
+    private void refreshUi() {
+        PreferenceScreen screen = getPreferenceScreen();
+        if (screen == null) {
+            screen = getPreferenceManager().createPreferenceScreen(getActivity());
+            setPreferenceScreen(screen);
+        } else {
+            screen.removeAll();
+        }
+        final int count = screen.getPreferenceCount();
+        if (count == 0) {
+            List<PermissionGroup> groups = mPermissionsInfo.getGroups();
+            for (PermissionGroup group : groups) {
+                if (group.possibleApps.size() == 0) continue;
+                PermissionPreference pref = new PermissionPreference(getActivity(), group);
+                pref.refreshUi();
+                screen.addPreference(pref);
+            }
+        } else {
+            for (int i = 0; i < count; i++) {
+                ((PermissionPreference) screen.getPreference(i)).refreshUi();
+            }
+        }
+    }
+
+    @Override
+    public void onPermissionLoadComplete() {
+        refreshUi();
+    }
+
+    @Override
+    public boolean onPreferenceClick(Preference preference) {
+        return true;
+    }
+
+    @Override
+    protected int getMetricsCategory() {
+        return MetricsLogger.MANAGE_PERMISSIONS;
+    }
+
+    private class PermissionPreference extends Preference implements OnPreferenceClickListener {
+        private final PermissionGroup mGroup;
+
+        public PermissionPreference(Context context, PermissionGroup group) {
+            super(context);
+            setOnPreferenceClickListener(this);
+            mGroup = group;
+        }
+
+        public void refreshUi() {
+            setTitle(mGroup.label);
+            setIcon(mGroup.icon);
+            setSummary(getContext().getString(R.string.app_permissions_group_summary,
+                    mGroup.grantedApps.size(), mGroup.possibleApps.size()));
+        }
+
+        @Override
+        public boolean onPreferenceClick(Preference preference) {
+            Intent i = new Intent(Intent.ACTION_MANAGE_PERMISSION_APPS)
+                    .putExtra(Intent.EXTRA_PERMISSION_NAME, mGroup.name);
+            try {
+                getActivity().startActivity(i);
+            } catch (ActivityNotFoundException e) {
+                Log.w(TAG, "No app to handle " + i.getAction());
+            }
+            return true;
+        }
+    }
+
+}