1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.settings.location;
18
19import android.preference.PreferenceScreen;
20import android.provider.Settings;
21
22import com.android.internal.logging.MetricsLogger;
23import com.android.settings.R;
24
25/**
26 * A page with 3 radio buttons to choose the location mode.
27 *
28 * There are 3 location modes when location access is enabled:
29 *
30 * High accuracy: use both GPS and network location.
31 *
32 * Battery saving: use network location only to reduce the power consumption.
33 *
34 * Sensors only: use GPS location only.
35 */
36public class LocationMode extends LocationSettingsBase
37        implements RadioButtonPreference.OnClickListener {
38    private static final String KEY_HIGH_ACCURACY = "high_accuracy";
39    private RadioButtonPreference mHighAccuracy;
40    private static final String KEY_BATTERY_SAVING = "battery_saving";
41    private RadioButtonPreference mBatterySaving;
42    private static final String KEY_SENSORS_ONLY = "sensors_only";
43    private RadioButtonPreference mSensorsOnly;
44
45    @Override
46    protected int getMetricsCategory() {
47        return MetricsLogger.LOCATION_MODE;
48    }
49
50    @Override
51    public void onResume() {
52        super.onResume();
53        createPreferenceHierarchy();
54    }
55
56    @Override
57    public void onPause() {
58        super.onPause();
59    }
60
61    private PreferenceScreen createPreferenceHierarchy() {
62        PreferenceScreen root = getPreferenceScreen();
63        if (root != null) {
64            root.removeAll();
65        }
66        addPreferencesFromResource(R.xml.location_mode);
67        root = getPreferenceScreen();
68
69        mHighAccuracy = (RadioButtonPreference) root.findPreference(KEY_HIGH_ACCURACY);
70        mBatterySaving = (RadioButtonPreference) root.findPreference(KEY_BATTERY_SAVING);
71        mSensorsOnly = (RadioButtonPreference) root.findPreference(KEY_SENSORS_ONLY);
72        mHighAccuracy.setOnClickListener(this);
73        mBatterySaving.setOnClickListener(this);
74        mSensorsOnly.setOnClickListener(this);
75
76        refreshLocationMode();
77        return root;
78    }
79
80    private void updateRadioButtons(RadioButtonPreference activated) {
81        if (activated == null) {
82            mHighAccuracy.setChecked(false);
83            mBatterySaving.setChecked(false);
84            mSensorsOnly.setChecked(false);
85        } else if (activated == mHighAccuracy) {
86            mHighAccuracy.setChecked(true);
87            mBatterySaving.setChecked(false);
88            mSensorsOnly.setChecked(false);
89        } else if (activated == mBatterySaving) {
90            mHighAccuracy.setChecked(false);
91            mBatterySaving.setChecked(true);
92            mSensorsOnly.setChecked(false);
93        } else if (activated == mSensorsOnly) {
94            mHighAccuracy.setChecked(false);
95            mBatterySaving.setChecked(false);
96            mSensorsOnly.setChecked(true);
97        }
98    }
99
100    @Override
101    public void onRadioButtonClicked(RadioButtonPreference emiter) {
102        int mode = Settings.Secure.LOCATION_MODE_OFF;
103        if (emiter == mHighAccuracy) {
104            mode = Settings.Secure.LOCATION_MODE_HIGH_ACCURACY;
105        } else if (emiter == mBatterySaving) {
106            mode = Settings.Secure.LOCATION_MODE_BATTERY_SAVING;
107        } else if (emiter == mSensorsOnly) {
108            mode = Settings.Secure.LOCATION_MODE_SENSORS_ONLY;
109        }
110        setLocationMode(mode);
111    }
112
113    @Override
114    public void onModeChanged(int mode, boolean restricted) {
115        switch (mode) {
116            case Settings.Secure.LOCATION_MODE_OFF:
117                updateRadioButtons(null);
118                break;
119            case Settings.Secure.LOCATION_MODE_SENSORS_ONLY:
120                updateRadioButtons(mSensorsOnly);
121                break;
122            case Settings.Secure.LOCATION_MODE_BATTERY_SAVING:
123                updateRadioButtons(mBatterySaving);
124                break;
125            case Settings.Secure.LOCATION_MODE_HIGH_ACCURACY:
126                updateRadioButtons(mHighAccuracy);
127                break;
128            default:
129                break;
130        }
131
132        boolean enabled = (mode != Settings.Secure.LOCATION_MODE_OFF) && !restricted;
133        mHighAccuracy.setEnabled(enabled);
134        mBatterySaving.setEnabled(enabled);
135        mSensorsOnly.setEnabled(enabled);
136    }
137
138    @Override
139    public int getHelpResource() {
140        return R.string.help_url_location_access;
141    }
142}
143