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Commit be794c30 authored by Lifu Tang's avatar Lifu Tang
Browse files

Added links to scanning settings 

Bug: 19918721
Change-Id: Ifb1508807d34b675e9ea1522f86a9310ed6b663f
parent 8019aa6b

res/values/strings.xml

+12 −2
Original line number Diff line number Diff line
@@ -1241,6 +1241,12 @@ 
    <string name="bluetooth_advanced_titlebar">Advanced Bluetooth</string>

    <!-- Bluetooth settings. Text displayed when Bluetooth is off and device list is empty [CHAR LIMIT=50]-->

    <string name="bluetooth_empty_list_bluetooth_off">When Bluetooth is turned on, your device can communicate with other nearby Bluetooth devices.</string>

    <!-- Message to describe "BLE scan always available feature" when Bluetooth is off. The

      place-holders "LINK_BEGIN" and "LINK_END" must NOT be translated. They mark a link to bring

      the user to "scanning settings" screen. -->

    <string name="ble_scan_notify_text">To improve location accuracy, Google services will scan for

        Bluetooth devices, even when Bluetooth is off. You can change this in LINK_BEGINscanning

        settingsLINK_END.</string>





    <!-- Bluetooth settings.  The title of the screen to pick which profiles to connect to on the device.  For example, headphones may have both A2DP and headset, this allows the user to choose which one he wants to connect to. -->
@@ -1411,8 +1417,12 @@ 
    <string name="wifi_select_assistant_dialog_title">Choose assistant</string>

    <!-- Preference title for option to install certificates -->

    <string name="wifi_install_credentials">Install certificates</string>

    <string name="wifi_scan_notify_text_location_on">To improve location accuracy and for other purposes, Google and other apps may scan for nearby networks, even when Wi-Fi is off. If you don\'t want this to happen, go to Advanced &gt; Scanning always available.</string>

    <string name="wifi_scan_notify_text_location_off">Apps may scan for nearby networks, even when Wi-Fi is off. If you don\'t want this to happen, go to Advanced &gt; Scanning always available.</string>

    <!-- Message to describe "Wi-Fi scan always available feature" when Wi-Fi is off. The

      place-holders "LINK_BEGIN" and "LINK_END" must NOT be translated. They mark a link to bring

      the user to "scanning settings" screen. -->

    <string name="wifi_scan_notify_text">To improve location accuracy, Google services will scan for

        Wi\u2011Fi networks, even when Wi\u2011Fi is off. You can change this in LINK_BEGINscanning

        settingsLINK_END.</string>

    <!-- Wifi scan always mode checkbox text -->

    <string name="wifi_scan_notify_remember_choice">Don\'t show again</string>

    <!-- Setting title for setting the wifi sleep policy. Do we keep Wi-Fi active when the screen turns off? -->

src/com/android/settings/LinkifyUtils.java

0 → 100644
+84 −0
Original line number Diff line number Diff line 
/*

 * 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;



import android.text.Spannable;

import android.text.TextPaint;

import android.text.method.LinkMovementMethod;

import android.text.style.ClickableSpan;

import android.view.View;

import android.widget.TextView;

import android.widget.TextView.BufferType;



/**

 * Utility class to create clickable links inside {@link TextView TextViews}.

 */

public class LinkifyUtils {

    private static final String PLACE_HOLDER_LINK_BEGIN = "LINK_BEGIN";

    private static final String PLACE_HOLDER_LINK_END = "LINK_END";



    private LinkifyUtils() {

    }



    /** Interface that handles the click event of the link */

    public interface OnClickListener {

        void onClick();

    }



    /**

     * Applies the text into the {@link TextView} and part of it a clickable link.

     * The text surrounded with "LINK_BEGIN" and "LINK_END" will become a clickable link. Only

     * supports at most one link.

     * @return true if the link has been successfully applied, or false if the original text

     *         contains no link place holders.

     */

    public static boolean linkify(TextView textView, StringBuilder text,

            final OnClickListener listener) {

        // Remove place-holders from the string and record their positions

        final int beginIndex = text.indexOf(PLACE_HOLDER_LINK_BEGIN);

        if (beginIndex == -1) {

            textView.setText(text);

            return false;

        }

        text.delete(beginIndex, beginIndex + PLACE_HOLDER_LINK_BEGIN.length());

        final int endIndex = text.indexOf(PLACE_HOLDER_LINK_END);

        if (endIndex == -1) {

            textView.setText(text);

            return false;

        }

        text.delete(endIndex, endIndex + PLACE_HOLDER_LINK_END.length());



        textView.setText(text.toString(), BufferType.SPANNABLE);

        textView.setMovementMethod(LinkMovementMethod.getInstance());

        Spannable spannableContent = (Spannable) textView.getText();

        ClickableSpan spannableLink = new ClickableSpan() {

            @Override

            public void onClick(View widget) {

                listener.onClick();

            }



            @Override

            public void updateDrawState(TextPaint ds) {

                super.updateDrawState(ds);

                ds.setUnderlineText(false);

            }

        };

        spannableContent.setSpan(spannableLink, beginIndex, endIndex,

                Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

        return true;

    }

}

src/com/android/settings/bluetooth/BluetoothSettings.java

+35 −2
Original line number Diff line number Diff line
@@ -33,7 +33,10 @@ import android.preference.Preference; 
import android.preference.PreferenceCategory;

import android.preference.PreferenceGroup;

import android.preference.PreferenceScreen;

import android.text.Spannable;

import android.text.style.TextAppearanceSpan;

import android.util.Log;

import android.view.Gravity;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.MenuInflater;
@@ -45,8 +48,10 @@ import android.widget.EditText; 
import android.widget.TextView;



import com.android.internal.logging.MetricsLogger;

import com.android.settings.LinkifyUtils;

import com.android.settings.R;

import com.android.settings.SettingsActivity;

import com.android.settings.location.ScanningSettings;

import com.android.settings.search.BaseSearchIndexProvider;

import com.android.settings.search.Indexable;

import com.android.settings.search.SearchIndexableRaw;
@@ -136,6 +141,7 @@ public final class BluetoothSettings extends DeviceListPreferenceFragment implem 


        mEmptyView = (TextView) getView().findViewById(android.R.id.empty);

        getListView().setEmptyView(mEmptyView);

        mEmptyView.setGravity(Gravity.START | Gravity.CENTER_VERTICAL);



        final SettingsActivity activity = (SettingsActivity) getActivity();

        mSwitchBar = activity.getSwitchBar();
@@ -352,7 +358,7 @@ public final class BluetoothSettings extends DeviceListPreferenceFragment implem 
                break;



            case BluetoothAdapter.STATE_OFF:

                messageId = R.string.bluetooth_empty_list_bluetooth_off;

                setOffMessage();

                if (isUiRestricted()) {

                    messageId = R.string.bluetooth_empty_list_user_restricted;

                }
@@ -366,12 +372,39 @@ public final class BluetoothSettings extends DeviceListPreferenceFragment implem 


        setDeviceListGroup(preferenceScreen);

        removeAllDevices();

        if (messageId != 0) {

            mEmptyView.setText(messageId);

        }

        if (!isUiRestricted()) {

            getActivity().invalidateOptionsMenu();

        }

    }



    private void setOffMessage() {

        if (mEmptyView == null) {

            return;

        }

        final CharSequence briefText = getText(R.string.bluetooth_empty_list_bluetooth_off);

        final StringBuilder contentBuilder = new StringBuilder();

        contentBuilder.append(briefText);

        contentBuilder.append("\n\n");

        contentBuilder.append(getText(R.string.ble_scan_notify_text));

        getPreferenceScreen().removeAll();

        LinkifyUtils.linkify(mEmptyView, contentBuilder, new LinkifyUtils.OnClickListener() {

            @Override

            public void onClick() {

                final SettingsActivity activity =

                        (SettingsActivity) BluetoothSettings.this.getActivity();

                activity.startPreferencePanel(ScanningSettings.class.getName(), null,

                        R.string.location_scanning_screen_title, null, null, 0);

            }

        });

        Spannable boldSpan = (Spannable) mEmptyView.getText();

        boldSpan.setSpan(

                new TextAppearanceSpan(getActivity(), android.R.style.TextAppearance_Medium), 0,

                briefText.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

    }



    @Override

    public void onBluetoothStateChanged(int bluetoothState) {

        super.onBluetoothStateChanged(bluetoothState);

src/com/android/settings/wifi/WifiSettings.java

+36 −15
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ package com.android.settings.wifi; 


import static android.net.wifi.WifiConfiguration.INVALID_NETWORK_ID;

import static android.os.UserManager.DISALLOW_CONFIG_WIFI;



import android.app.Activity;

import android.app.Dialog;

import android.content.Context;
@@ -25,7 +26,7 @@ import android.content.DialogInterface; 
import android.content.Intent;

import android.content.res.Resources;

import android.content.res.TypedArray;

import android.location.LocationManager;

import android.graphics.drawable.Drawable;

import android.net.ConnectivityManager;

import android.net.NetworkInfo;

import android.net.NetworkInfo.State;
@@ -36,21 +37,27 @@ import android.nfc.NfcAdapter; 
import android.os.Bundle;

import android.preference.Preference;

import android.preference.PreferenceScreen;

import android.text.Spannable;

import android.text.style.TextAppearanceSpan;

import android.util.Log;

import android.view.ContextMenu;

import android.view.ContextMenu.ContextMenuInfo;

import android.view.Gravity;

import android.view.Menu;

import android.view.MenuInflater;

import android.view.MenuItem;

import android.view.View;

import android.widget.AdapterView.AdapterContextMenuInfo;

import android.widget.TextView;

import android.widget.TextView.BufferType;

import android.widget.Toast;



import com.android.internal.logging.MetricsLogger;

import com.android.settings.LinkifyUtils;

import com.android.settings.R;

import com.android.settings.RestrictedSettingsFragment;

import com.android.settings.SettingsActivity;

import com.android.settings.location.ScanningSettings;

import com.android.settings.search.BaseSearchIndexProvider;

import com.android.settings.search.Indexable;

import com.android.settings.search.SearchIndexableRaw;
@@ -608,27 +615,41 @@ public class WifiSettings extends RestrictedSettingsFragment 


    protected TextView initEmptyView() {

        TextView emptyView = (TextView) getActivity().findViewById(android.R.id.empty);

        emptyView.setGravity(Gravity.START | Gravity.CENTER_VERTICAL);

        getListView().setEmptyView(emptyView);

        return emptyView;

    }



    private void setOffMessage() {

        if (mEmptyView != null) {

            mEmptyView.setText(R.string.wifi_empty_list_wifi_off);

            if (android.provider.Settings.Global.getInt(getActivity().getContentResolver(),

                    android.provider.Settings.Global.WIFI_SCAN_ALWAYS_AVAILABLE, 0) == 1) {

                mEmptyView.append("\n\n");

                int resId;

                if (android.provider.Settings.Secure.isLocationProviderEnabled(

                        getActivity().getContentResolver(), LocationManager.NETWORK_PROVIDER)) {

                    resId = R.string.wifi_scan_notify_text_location_on;

                } else {

                    resId = R.string.wifi_scan_notify_text_location_off;

                }

                CharSequence charSeq = getText(resId);

                mEmptyView.append(charSeq);

            }

        if (mEmptyView == null) {

            return;

        }



        final CharSequence briefText = getText(R.string.wifi_empty_list_wifi_off);

        if (isUiRestricted()) {

            // Show only the brief text if the user is not allowed to configure scanning settings.

            mEmptyView.setText(briefText, BufferType.SPANNABLE);

        } else {

            // Append the description of scanning settings with link.

            final StringBuilder contentBuilder = new StringBuilder();

            contentBuilder.append(briefText);

            contentBuilder.append("\n\n");

            contentBuilder.append(getText(R.string.wifi_scan_notify_text));

            LinkifyUtils.linkify(mEmptyView, contentBuilder, new LinkifyUtils.OnClickListener() {

                @Override

                public void onClick() {

                    final SettingsActivity activity =

                            (SettingsActivity) WifiSettings.this.getActivity();

                    activity.startPreferencePanel(ScanningSettings.class.getName(), null,

                            R.string.location_scanning_screen_title, null, null, 0);

                }

            });

        }

        // Embolden and enlarge the brief description anyway.

        Spannable boldSpan = (Spannable) mEmptyView.getText();

        boldSpan.setSpan(

                new TextAppearanceSpan(getActivity(), android.R.style.TextAppearance_Medium), 0,

                briefText.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

        getPreferenceScreen().removeAll();

    }