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.settings.R;
23
24/**
25 * A page with 3 radio buttons to choose the location mode.
26 *
27 * There are 3 location modes when location access is enabled:
28 *
29 * High accuracy: use both GPS and network location.
30 *
31 * Battery saving: use network location only to reduce the power consumption.
32 *
33 * Sensors only: use GPS location only.
34 */
35public class LocationMode extends LocationSettingsBase
36        implements RadioButtonPreference.OnClickListener {
37    private static final String KEY_HIGH_ACCURACY = "high_accuracy";
38    private RadioButtonPreference mHighAccuracy;
39    private static final String KEY_BATTERY_SAVING = "battery_saving";
40    private RadioButtonPreference mBatterySaving;
41    private static final String KEY_SENSORS_ONLY = "sensors_only";
42    private RadioButtonPreference mSensorsOnly;
43
44    @Override
45    public void onResume() {
46        super.onResume();
47        createPreferenceHierarchy();
48    }
49
50    @Override
51    public void onPause() {
52        super.onPause();
53    }
54
55    private PreferenceScreen createPreferenceHierarchy() {
56        PreferenceScreen root = getPreferenceScreen();
57        if (root != null) {
58            root.removeAll();
59        }
60        addPreferencesFromResource(R.xml.location_mode);
61        root = getPreferenceScreen();
62
63        mHighAccuracy = (RadioButtonPreference) root.findPreference(KEY_HIGH_ACCURACY);
64        mBatterySaving = (RadioButtonPreference) root.findPreference(KEY_BATTERY_SAVING);
65        mSensorsOnly = (RadioButtonPreference) root.findPreference(KEY_SENSORS_ONLY);
66        mHighAccuracy.setOnClickListener(this);
67        mBatterySaving.setOnClickListener(this);
68        mSensorsOnly.setOnClickListener(this);
69
70        refreshLocationMode();
71        return root;
72    }
73
74    private void updateRadioButtons(RadioButtonPreference activated) {
75        if (activated == null) {
76            mHighAccuracy.setChecked(false);
77            mBatterySaving.setChecked(false);
78            mSensorsOnly.setChecked(false);
79        } else if (activated == mHighAccuracy) {
80            mHighAccuracy.setChecked(true);
81            mBatterySaving.setChecked(false);
82            mSensorsOnly.setChecked(false);
83        } else if (activated == mBatterySaving) {
84            mHighAccuracy.setChecked(false);
85            mBatterySaving.setChecked(true);
86            mSensorsOnly.setChecked(false);
87        } else if (activated == mSensorsOnly) {
88            mHighAccuracy.setChecked(false);
89            mBatterySaving.setChecked(false);
90            mSensorsOnly.setChecked(true);
91        }
92    }
93
94    @Override
95    public void onRadioButtonClicked(RadioButtonPreference emiter) {
96        int mode = Settings.Secure.LOCATION_MODE_OFF;
97        if (emiter == mHighAccuracy) {
98            mode = Settings.Secure.LOCATION_MODE_HIGH_ACCURACY;
99        } else if (emiter == mBatterySaving) {
100            mode = Settings.Secure.LOCATION_MODE_BATTERY_SAVING;
101        } else if (emiter == mSensorsOnly) {
102            mode = Settings.Secure.LOCATION_MODE_SENSORS_ONLY;
103        }
104        setLocationMode(mode);
105    }
106
107    @Override
108    public void onModeChanged(int mode, boolean restricted) {
109        switch (mode) {
110            case Settings.Secure.LOCATION_MODE_OFF:
111                updateRadioButtons(null);
112                break;
113            case Settings.Secure.LOCATION_MODE_SENSORS_ONLY:
114                updateRadioButtons(mSensorsOnly);
115                break;
116            case Settings.Secure.LOCATION_MODE_BATTERY_SAVING:
117                updateRadioButtons(mBatterySaving);
118                break;
119            case Settings.Secure.LOCATION_MODE_HIGH_ACCURACY:
120                updateRadioButtons(mHighAccuracy);
121                break;
122            default:
123                break;
124        }
125
126        boolean enabled = (mode != Settings.Secure.LOCATION_MODE_OFF) && !restricted;
127        mHighAccuracy.setEnabled(enabled);
128        mBatterySaving.setEnabled(enabled);
129        mSensorsOnly.setEnabled(enabled);
130    }
131
132    @Override
133    public int getHelpResource() {
134        return R.string.help_url_location_access;
135    }
136}
137