Rename "badges" to "dots" where appropriate

This will reduce confusion with the other "badging" concept we use for,
e.g. work profiles. It is also consistent with the external name
"notification dots".

Change-Id: I2a2c9d96dc0d6284eb0c48adc78a856271caad4d

src/com/android/launcher3/settings/NotificationDotsPreference.java

@@ -0,0 +1,140 @@
+/*
+ * 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.settings;
+
+import static com.android.launcher3.settings.SettingsActivity.EXTRA_FRAGMENT_ARG_KEY;
+import static com.android.launcher3.settings.SettingsActivity.EXTRA_SHOW_FRAGMENT_ARGS;
+
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.app.DialogFragment;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.os.Bundle;
+import android.provider.Settings;
+import android.util.AttributeSet;
+import android.view.View;
+
+import com.android.launcher3.R;
+import com.android.launcher3.notification.NotificationListener;
+import com.android.launcher3.util.SecureSettingsObserver;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceViewHolder;
+
+/**
+ * A {@link Preference} for indicating notification dots status.
+ * Also has utility methods for updating UI based on dots status changes.
+ */
+public class NotificationDotsPreference extends Preference
+        implements SecureSettingsObserver.OnChangeListener {
+
+    private boolean mWidgetFrameVisible = false;
+
+    /** Hidden field Settings.Secure.ENABLED_NOTIFICATION_LISTENERS */
+    private static final String NOTIFICATION_ENABLED_LISTENERS = "enabled_notification_listeners";
+
+    public NotificationDotsPreference(
+            Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+    public NotificationDotsPreference(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    public NotificationDotsPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public NotificationDotsPreference(Context context) {
+        super(context);
+    }
+
+    private void setWidgetFrameVisible(boolean isVisible) {
+        if (mWidgetFrameVisible != isVisible) {
+            mWidgetFrameVisible = isVisible;
+            notifyChanged();
+        }
+    }
+
+    @Override
+    public void onBindViewHolder(PreferenceViewHolder holder) {
+        super.onBindViewHolder(holder);
+
+        View widgetFrame = holder.findViewById(android.R.id.widget_frame);
+        if (widgetFrame != null) {
+            widgetFrame.setVisibility(mWidgetFrameVisible ? View.VISIBLE : View.GONE);
+        }
+    }
+
+    @Override
+    public void onSettingsChanged(boolean enabled) {
+        int summary = enabled
+                ? R.string.notification_dots_desc_on
+                : R.string.notification_dots_desc_off;
+
+        boolean serviceEnabled = true;
+        if (enabled) {
+            // Check if the listener is enabled or not.
+            String enabledListeners = Settings.Secure.getString(
+                    getContext().getContentResolver(), NOTIFICATION_ENABLED_LISTENERS);
+            ComponentName myListener =
+                    new ComponentName(getContext(), NotificationListener.class);
+            serviceEnabled = enabledListeners != null &&
+                    (enabledListeners.contains(myListener.flattenToString()) ||
+                            enabledListeners.contains(myListener.flattenToShortString()));
+            if (!serviceEnabled) {
+                summary = R.string.title_missing_notification_access;
+            }
+        }
+        setWidgetFrameVisible(!serviceEnabled);
+        setFragment(serviceEnabled ? null : NotificationAccessConfirmation.class.getName());
+        setSummary(summary);
+    }
+
+    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);
+            Bundle showFragmentArgs = new Bundle();
+            showFragmentArgs.putString(EXTRA_FRAGMENT_ARG_KEY, cn.flattenToString());
+
+            Intent intent = new Intent(Settings.ACTION_NOTIFICATION_LISTENER_SETTINGS)
+                    .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+                    .putExtra(EXTRA_FRAGMENT_ARG_KEY, cn.flattenToString())
+                    .putExtra(EXTRA_SHOW_FRAGMENT_ARGS, showFragmentArgs);
+            getActivity().startActivity(intent);
+        }
+    }
+}