CameraSettings.java revision 723f84eadb3c1a79337ef20e4d0a014341537adb 
1package com.android.camera;
2
3import android.app.Activity;
4import android.content.Context;
5import android.content.SharedPreferences;
6import android.graphics.drawable.Drawable;
7import android.hardware.Camera.Parameters;
8import android.hardware.Camera.Size;
9import android.os.SystemProperties;
10import android.preference.ListPreference;
11import android.preference.Preference;
12import android.preference.PreferenceGroup;
13import android.preference.PreferenceManager;
14import android.preference.PreferenceScreen;
15
16import java.util.ArrayList;
17import java.util.List;
18
19public class CameraSettings {
20    private static final int FIRST_REQUEST_CODE = 100;
21    private static final int NOT_FOUND = -1;
22
23    public static final String KEY_VERSION = "pref_version_key";
24    public static final String KEY_RECORD_LOCATION =
25            "pref_camera_recordlocation_key";
26    public static final String KEY_VIDEO_QUALITY =
27            "pref_camera_videoquality_key";
28    public static final String KEY_VIDEO_DURATION =
29            "pref_camera_video_duration_key";
30    public static final String KEY_PICTURE_SIZE = "pref_camera_picturesize_key";
31    public static final String KEY_JPEG_QUALITY = "pref_camera_jpegquality_key";
32    public static final String KEY_FOCUS_MODE = "pref_camera_focusmode_key";
33    public static final String KEY_FLASH_MODE = "pref_camera_flashmode_key";
34    public static final String KEY_COLOR_EFFECT = "pref_camera_coloreffect_key";
35    public static final String KEY_WHITE_BALANCE =
36            "pref_camera_whitebalance_key";
37    public static final String KEY_SCENE_MODE = "pref_camera_scenemode_key";
38
39    public static final int CURRENT_VERSION = 1;
40
41    // max mms video duration in seconds.
42    public static final int MMS_VIDEO_DURATION =
43            SystemProperties.getInt("ro.media.enc.lprof.duration", 60);
44
45    public static final boolean DEFAULT_VIDEO_QUALITY_VALUE = true;
46
47    // MMS video length
48    public static final int DEFAULT_VIDEO_DURATION_VALUE = -1;
49
50    @SuppressWarnings("unused")
51    private static final String TAG = "CameraSettings";
52
53    private final Context mContext;
54    private final Parameters mParameters;
55    private final PreferenceManager mManager;
56
57    public CameraSettings(Activity activity, Parameters parameters) {
58        mContext = activity;
59        mParameters = parameters;
60        mManager = new PreferenceManager(activity, FIRST_REQUEST_CODE);
61    }
62
63    public PreferenceScreen getPreferenceScreen(int preferenceRes) {
64        PreferenceScreen screen = mManager.createPreferenceScreen(mContext);
65        mManager.inflateFromResource(mContext, preferenceRes, screen);
66        initPreference(screen);
67        return screen;
68    }
69
70    private void initPreference(PreferenceScreen screen) {
71        ListPreference videoDuration =
72                (ListPreference) screen.findPreference(KEY_VIDEO_DURATION);
73        ListPreference pictureSize =
74                (ListPreference) screen.findPreference(KEY_PICTURE_SIZE);
75        ListPreference whiteBalance =
76                (ListPreference) screen.findPreference(KEY_WHITE_BALANCE);
77        ListPreference colorEffect =
78                (ListPreference) screen.findPreference(KEY_COLOR_EFFECT);
79        ListPreference sceneMode =
80                (ListPreference) screen.findPreference(KEY_SCENE_MODE);
81        ListPreference flashMode =
82                (ListPreference) screen.findPreference(KEY_FLASH_MODE);
83
84        // Since the screen could be loaded from different resources, we need
85        // to check if the preference is available here
86        if (videoDuration != null) {
87            // Modify video duration settings.
88            // The first entry is for MMS video duration, and we need to fill
89            // in the device-dependent value (in seconds).
90            CharSequence[] entries = videoDuration.getEntries();
91            entries[0] = String.format(
92                    entries[0].toString(), MMS_VIDEO_DURATION);
93        }
94
95        // Filter out unsupported settings / options
96        if (pictureSize != null) {
97            filterUnsupportedOptions(screen, pictureSize, sizeListToStringList(
98                    mParameters.getSupportedPictureSizes()));
99        }
100        if (whiteBalance != null) {
101            filterUnsupportedOptions(screen,
102                    whiteBalance, mParameters.getSupportedWhiteBalance());
103        }
104        if (colorEffect != null) {
105            filterUnsupportedOptions(screen,
106                    colorEffect, mParameters.getSupportedColorEffects());
107        }
108        if (sceneMode != null) {
109            filterUnsupportedOptions(screen,
110                    sceneMode, mParameters.getSupportedSceneModes());
111        }
112        if (flashMode != null) {
113            filterUnsupportedOptions(screen,
114                    flashMode, mParameters.getSupportedFlashModes());
115        }
116    }
117
118    private boolean removePreference(PreferenceGroup group, Preference remove) {
119        if (group.removePreference(remove)) return true;
120
121        for (int i = 0; i < group.getPreferenceCount(); i++) {
122            final Preference child = group.getPreference(i);
123            if (child instanceof PreferenceGroup) {
124                if (removePreference((PreferenceGroup) child, remove)) {
125                    return true;
126                }
127            }
128        }
129        return false;
130    }
131
132    private void filterUnsupportedOptions(PreferenceScreen screen,
133            ListPreference pref, List<String> supported) {
134
135        // Remove the preference if the parameter is not supported.
136        if (supported == null) {
137            removePreference(screen, pref);
138            return;
139        }
140
141        // Prepare setting entries and entry values.
142        CharSequence[] allEntries = pref.getEntries();
143        CharSequence[] allEntryValues = pref.getEntryValues();
144        Drawable[] allIcons = (pref instanceof IconListPreference)
145                ? ((IconListPreference) pref).getIcons()
146                : null;
147        ArrayList<CharSequence> entries = new ArrayList<CharSequence>();
148        ArrayList<CharSequence> entryValues = new ArrayList<CharSequence>();
149        ArrayList<Drawable> icons =
150                allIcons == null ? null : new ArrayList<Drawable>();
151        for (int i = 0, len = allEntryValues.length; i < len; i++) {
152            if (supported.indexOf(allEntryValues[i].toString()) != NOT_FOUND) {
153                entries.add(allEntries[i]);
154                entryValues.add(allEntryValues[i]);
155                if (allIcons != null) icons.add(allIcons[i]);
156            }
157        }
158
159        // Set entries and entry values to list preference.
160        int size = entries.size();
161        pref.setEntries(entries.toArray(new CharSequence[size]));
162        pref.setEntryValues(entryValues.toArray(new CharSequence[size]));
163        if (allIcons != null) {
164            ((IconListPreference) pref)
165                    .setIcons(icons.toArray(new Drawable[size]));
166        }
167
168        // Set the value to the first entry if it is invalid.
169        String value = pref.getValue();
170        if (pref.findIndexOfValue(value) == NOT_FOUND) {
171            pref.setValueIndex(0);
172        }
173    }
174
175    private static List<String> sizeListToStringList(List<Size> sizes) {
176        ArrayList<String> list = new ArrayList<String>();
177        for (Size size : sizes) {
178            list.add(String.format("%dx%d", size.width, size.height));
179        }
180        return list;
181    }
182
183    public static void upgradePreferences(SharedPreferences pref) {
184        int version;
185        try {
186            version = pref.getInt(KEY_VERSION, 0);
187        } catch (Exception ex) {
188            version = 0;
189        }
190
191        if (version == 0) {
192            SharedPreferences.Editor editor = pref.edit();
193            // For old version, change 1 to -1 for video duration preference.
194            if (pref.getString(KEY_VIDEO_DURATION, "1").equals("1")) {
195                editor.putString(KEY_VIDEO_DURATION, "-1");
196            }
197            editor.putInt(KEY_VERSION, CURRENT_VERSION);
198            editor.commit();
199        }
200    }
201}
202