Adding a warning button when notification access is not available

Bug: 63418030
Change-Id: I4c2c497d989902ac002314a3b8fb97083757958b

res/drawable/ic_warning.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2017 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.
+-->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0"
+        android:tint="?android:attr/textColorPrimary" >
+    <path
+        android:fillColor="#FFFFFFFF"
+        android:pathData="M1 21h22L12 2 1 21zm12-3h-2v-2h2v2zm0-4h-2v-4h2v4z"/>
+</vector>

res/layout/notification_pref_warning.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2017 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.
+-->
+<ImageView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="48dp"
+    android:layout_height="match_parent"
+    android:background="?android:attr/selectableItemBackgroundBorderless"
+    android:contentDescription="@string/title_missing_notification_access"
+    android:scaleType="center"
+    android:src="@drawable/ic_warning"
+    android:tint="?android:attr/textColorSecondary" />

res/values/strings.xml

@@ -178,6 +178,12 @@
     <string name="icon_badging_desc_on">On</string>
     <!-- Text to indicate that the system icon badging setting is off [CHAR LIMIT=100] -->
     <string name="icon_badging_desc_off">Off</string>
+    <!-- Title for the dialog shown when the app does not has notification access, explaining the requirement for notification access [CHAR LIMIT=50] -->
+    <string name="title_missing_notification_access">Notification access needed</string>
+    <!-- Message explaining to the user that the notification access is required by the app for showing 'Notification dots' [CHAR LIMIT=NONE] -->
+    <string name="msg_missing_notification_access">To show Notification Dots, turn on app notifications for <xliff:g id="name" example="My App">%1$s</xliff:g></string>
+    <!-- Button text in the confirmation dialog which would take the user to the system settings [CHAR LIMIT=50] -->
+    <string name="title_change_settings">Change settings</string>
 
     <!-- Label for the setting that allows the automatic placement of launcher shortcuts for applications and games installed on the device [CHAR LIMIT=40] -->
     <string name="auto_add_shortcuts_label">Add icon to Home screen</string>

res/xml/launcher_preferences.xml

@@ -16,17 +16,18 @@
 
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
 
-    <Preference
+    <com.android.launcher3.views.ButtonPreference
         android:key="pref_icon_badging"
         android:title="@string/icon_badging_title"
-        android:persistent="false">
+        android:persistent="false"
+        android:widgetLayout="@layout/notification_pref_warning" >
         <intent android:action="android.settings.NOTIFICATION_SETTINGS">
             <!-- This extra highlights the "Allow icon badges" field in Notification settings -->
             <extra
                 android:name=":settings:fragment_args_key"
                 android:value="notification_badging" />
         </intent>
-    </Preference>
+    </com.android.launcher3.views.ButtonPreference>
 
     <SwitchPreference
         android:key="pref_add_icon_to_home"

src/com/android/launcher3/SettingsActivity.java

@@ -17,7 +17,15 @@
 package com.android.launcher3;
 
 import android.app.Activity;
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.app.DialogFragment;
+import android.app.FragmentManager;
+import android.content.ComponentName;
 import android.content.ContentResolver;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
 import android.database.ContentObserver;
 import android.os.Bundle;
 import android.os.Handler;
@@ -26,8 +34,11 @@ import android.preference.Preference;
 import android.preference.PreferenceFragment;
 import android.provider.Settings;
 import android.provider.Settings.System;
+import android.view.View;
 
 import com.android.launcher3.graphics.IconShapeOverride;
+import com.android.launcher3.notification.NotificationListener;
+import com.android.launcher3.views.ButtonPreference;
 
 /**
  * Settings activity for Launcher. Currently implements the following setting: Allow rotation
@@ -37,6 +48,8 @@ public class SettingsActivity extends Activity {
     private static final String ICON_BADGING_PREFERENCE_KEY = "pref_icon_badging";
     // TODO: use Settings.Secure.NOTIFICATION_BADGING
     private static final String NOTIFICATION_BADGING = "notification_badging";
+    /** Hidden field Settings.Secure.ENABLED_NOTIFICATION_LISTENERS */
+    private static final String NOTIFICATION_ENABLED_LISTENERS = "enabled_notification_listeners";
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -85,17 +98,22 @@ public class SettingsActivity extends Activity {
                 rotationPref.setDefaultValue(Utilities.getAllowRotationDefaultValue(getActivity()));
             }
 
-            Preference iconBadgingPref = findPreference(ICON_BADGING_PREFERENCE_KEY);
+            ButtonPreference iconBadgingPref =
+                    (ButtonPreference) findPreference(ICON_BADGING_PREFERENCE_KEY);
             if (!Utilities.isAtLeastO()) {
                 getPreferenceScreen().removePreference(
                         findPreference(SessionCommitReceiver.ADD_ICON_PREFERENCE_KEY));
                 getPreferenceScreen().removePreference(iconBadgingPref);
             } else {
                 // Listen to system notification badge settings while this UI is active.
-                mIconBadgingObserver = new IconBadgingObserver(iconBadgingPref, resolver);
+                mIconBadgingObserver = new IconBadgingObserver(
+                        iconBadgingPref, resolver, getFragmentManager());
                 resolver.registerContentObserver(
                         Settings.Secure.getUriFor(NOTIFICATION_BADGING),
                         false, mIconBadgingObserver);
+                resolver.registerContentObserver(
+                        Settings.Secure.getUriFor(NOTIFICATION_ENABLED_LISTENERS),
+                        false, mIconBadgingObserver);
                 mIconBadgingObserver.onChange(true);
             }
 
@@ -153,24 +171,74 @@ public class SettingsActivity extends Activity {
      * Content observer which listens for system badging setting changes,
      * and updates the launcher badging setting subtext accordingly.
      */
-    private static class IconBadgingObserver extends ContentObserver {
+    private static class IconBadgingObserver extends ContentObserver
+            implements View.OnClickListener {
 
-        private final Preference mBadgingPref;
+        private final ButtonPreference mBadgingPref;
         private final ContentResolver mResolver;
+        private final FragmentManager mFragmentManager;
 
-        public IconBadgingObserver(Preference badgingPref, ContentResolver resolver) {
+        public IconBadgingObserver(ButtonPreference badgingPref, ContentResolver resolver,
+                FragmentManager fragmentManager) {
             super(new Handler());
             mBadgingPref = badgingPref;
             mResolver = resolver;
+            mFragmentManager = fragmentManager;
         }
 
         @Override
         public void onChange(boolean selfChange) {
             boolean enabled = Settings.Secure.getInt(mResolver, NOTIFICATION_BADGING, 1) == 1;
-            mBadgingPref.setSummary(enabled
+            int summary = enabled ? R.string.icon_badging_desc_on : R.string.icon_badging_desc_off;
-                    ? R.string.icon_badging_desc_on
+
-                    : R.string.icon_badging_desc_off);
+            boolean serviceEnabled = true;
+            if (enabled) {
+                // Check if the listener is enabled or not.
+                String enabledListeners =
+                        Settings.Secure.getString(mResolver, NOTIFICATION_ENABLED_LISTENERS);
+                ComponentName myListener =
+                        new ComponentName(mBadgingPref.getContext(), NotificationListener.class);
+                serviceEnabled = enabledListeners != null &&
+                        (enabledListeners.contains(myListener.flattenToString()) ||
+                                enabledListeners.contains(myListener.flattenToShortString()));
+                if (!serviceEnabled) {
+                    summary = R.string.title_missing_notification_access;
+                }
+            }
+            mBadgingPref.setButtonOnClickListener(serviceEnabled ? null : this);
+            mBadgingPref.setSummary(summary);
+
+        }
+
+        @Override
+        public void onClick(View view) {
+            new NotificationAccessConfirmation().show(mFragmentManager, "notification_access");
         }
     }
 
+    public static class NotificationAccessConfirmation
+            extends DialogFragment implements DialogInterface.OnClickListener {
+
+        @Override
+        public Dialog onCreateDialog(Bundle savedInstanceState) {
+            final Context context = getActivity();
+            String msg = context.getString(R.string.msg_missing_notification_access,
+                    context.getString(R.string.derived_app_name));
+            return new AlertDialog.Builder(context)
+                    .setTitle(R.string.title_missing_notification_access)
+                    .setMessage(msg)
+                    .setNegativeButton(android.R.string.cancel, null)
+                    .setPositiveButton(R.string.title_change_settings, this)
+                    .create();
+        }
+
+        @Override
+        public void onClick(DialogInterface dialogInterface, int i) {
+            ComponentName cn = new ComponentName(getActivity(), NotificationListener.class);
+            Intent intent = new Intent(Settings.ACTION_NOTIFICATION_LISTENER_SETTINGS)
+                    .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+                    .putExtra(":settings:fragment_args_key", cn.flattenToString());
+            getActivity().startActivity(intent);
+        }
+    }
 }

src/com/android/launcher3/views/ButtonPreference.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2017 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.launcher3.views;
+
+import android.content.Context;
+import android.preference.Preference;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.ViewGroup;
+
+/**
+ * Extension of {@link Preference} which makes the widget layout clickable.
+ *
+ * @see #setWidgetLayoutResource(int)
+ */
+public class ButtonPreference extends Preference {
+
+    private View.OnClickListener mClickListener;
+
+    public ButtonPreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+    public ButtonPreference(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    public ButtonPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public ButtonPreference(Context context) {
+        super(context);
+    }
+
+    public void setButtonOnClickListener(View.OnClickListener clickListener) {
+        if (mClickListener != clickListener) {
+            mClickListener = clickListener;
+            notifyChanged();
+        }
+    }
+
+    @Override
+    protected void onBindView(View view) {
+        super.onBindView(view);
+
+        ViewGroup widgetFrame = view.findViewById(android.R.id.widget_frame);
+        if (widgetFrame != null) {
+            View button = widgetFrame.getChildAt(0);
+            if (button != null) {
+                button.setOnClickListener(mClickListener);
+            }
+            widgetFrame.setVisibility(
+                    (mClickListener == null || button == null) ? View.GONE : View.VISIBLE);
+        }
+    }
+}