CameraSettings.java revision a8bbcd7ce25aada705561852ea9f356dc38c0f43 
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    public static void initialCameraPictureSize(
71            Context context, Parameters parameters) {
72        // When launching the camera app first time, we will set the picture
73        // size to the first one in the list defined in "arrays.xml" and is also
74        // supported by the driver.
75        List<Size> supported = parameters.getSupportedPictureSizes();
76        if (supported == null) return;
77        for (String candidate : context.getResources().getStringArray(
78                R.array.pref_camera_picturesize_entryvalues)) {
79            if (setCameraPictureSize(candidate, supported, parameters)) {
80                SharedPreferences.Editor editor = PreferenceManager
81                        .getDefaultSharedPreferences(context).edit();
82                editor.putString(KEY_PICTURE_SIZE, candidate);
83                editor.commit();
84                return;
85            }
86        }
87    }
88
89    public static boolean setCameraPictureSize(
90            String candidate, List<Size> supported, Parameters parameters) {
91        int index = candidate.indexOf('x');
92        if (index == NOT_FOUND) return false;
93        int width = Integer.parseInt(candidate.substring(0, index));
94        int height = Integer.parseInt(candidate.substring(index + 1));
95        for (Size size: supported) {
96            if (size.width == width && size.height == height) {
97                parameters.setPictureSize(width, height);
98                return true;
99            }
100        }
101        return false;
102    }
103
104    private void initPreference(PreferenceScreen screen) {
105        ListPreference videoDuration =
106                (ListPreference) screen.findPreference(KEY_VIDEO_DURATION);
107        ListPreference pictureSize =
108                (ListPreference) screen.findPreference(KEY_PICTURE_SIZE);
109        ListPreference whiteBalance =
110                (ListPreference) screen.findPreference(KEY_WHITE_BALANCE);
111        ListPreference colorEffect =
112                (ListPreference) screen.findPreference(KEY_COLOR_EFFECT);
113        ListPreference sceneMode =
114                (ListPreference) screen.findPreference(KEY_SCENE_MODE);
115        ListPreference flashMode =
116                (ListPreference) screen.findPreference(KEY_FLASH_MODE);
117
118        // Since the screen could be loaded from different resources, we need
119        // to check if the preference is available here
120        if (videoDuration != null) {
121            // Modify video duration settings.
122            // The first entry is for MMS video duration, and we need to fill
123            // in the device-dependent value (in seconds).
124            CharSequence[] entries = videoDuration.getEntries();
125            entries[0] = String.format(
126                    entries[0].toString(), MMS_VIDEO_DURATION);
127        }
128
129        // Filter out unsupported settings / options
130        if (pictureSize != null) {
131            filterUnsupportedOptions(screen, pictureSize, sizeListToStringList(
132                    mParameters.getSupportedPictureSizes()));
133        }
134        if (whiteBalance != null) {
135            filterUnsupportedOptions(screen,
136                    whiteBalance, mParameters.getSupportedWhiteBalance());
137        }
138        if (colorEffect != null) {
139            filterUnsupportedOptions(screen,
140                    colorEffect, mParameters.getSupportedColorEffects());
141        }
142        if (sceneMode != null) {
143            filterUnsupportedOptions(screen,
144                    sceneMode, mParameters.getSupportedSceneModes());
145        }
146        if (flashMode != null) {
147            filterUnsupportedOptions(screen,
148                    flashMode, mParameters.getSupportedFlashModes());
149        }
150    }
151
152    private boolean removePreference(PreferenceGroup group, Preference remove) {
153        if (group.removePreference(remove)) return true;
154
155        for (int i = 0; i < group.getPreferenceCount(); i++) {
156            final Preference child = group.getPreference(i);
157            if (child instanceof PreferenceGroup) {
158                if (removePreference((PreferenceGroup) child, remove)) {
159                    return true;
160                }
161            }
162        }
163        return false;
164    }
165
166    private void filterUnsupportedOptions(PreferenceScreen screen,
167            ListPreference pref, List<String> supported) {
168
169        // Remove the preference if the parameter is not supported.
170        if (supported == null) {
171            removePreference(screen, pref);
172            return;
173        }
174
175        // Prepare setting entries and entry values.
176        CharSequence[] allEntries = pref.getEntries();
177        CharSequence[] allEntryValues = pref.getEntryValues();
178        Drawable[] allIcons = (pref instanceof IconListPreference)
179                ? ((IconListPreference) pref).getIcons()
180                : null;
181        ArrayList<CharSequence> entries = new ArrayList<CharSequence>();
182        ArrayList<CharSequence> entryValues = new ArrayList<CharSequence>();
183        ArrayList<Drawable> icons =
184                allIcons == null ? null : new ArrayList<Drawable>();
185        for (int i = 0, len = allEntryValues.length; i < len; i++) {
186            if (supported.indexOf(allEntryValues[i].toString()) != NOT_FOUND) {
187                entries.add(allEntries[i]);
188                entryValues.add(allEntryValues[i]);
189                if (allIcons != null) icons.add(allIcons[i]);
190            }
191        }
192
193        // Set entries and entry values to list preference.
194        int size = entries.size();
195        pref.setEntries(entries.toArray(new CharSequence[size]));
196        pref.setEntryValues(entryValues.toArray(new CharSequence[size]));
197        if (allIcons != null) {
198            ((IconListPreference) pref)
199                    .setIcons(icons.toArray(new Drawable[size]));
200        }
201
202        // Set the value to the first entry if it is invalid.
203        String value = pref.getValue();
204        if (pref.findIndexOfValue(value) == NOT_FOUND) {
205            pref.setValueIndex(0);
206        }
207    }
208
209    private static List<String> sizeListToStringList(List<Size> sizes) {
210        ArrayList<String> list = new ArrayList<String>();
211        for (Size size : sizes) {
212            list.add(String.format("%dx%d", size.width, size.height));
213        }
214        return list;
215    }
216
217    public static void upgradePreferences(SharedPreferences pref) {
218        int version;
219        try {
220            version = pref.getInt(KEY_VERSION, 0);
221        } catch (Exception ex) {
222            version = 0;
223        }
224        if (version == CURRENT_VERSION) return;
225
226        SharedPreferences.Editor editor = pref.edit();
227        if (version == 0) {
228            // For old version, change 1 to -1 for video duration preference.
229            if (pref.getString(KEY_VIDEO_DURATION, "1").equals("1")) {
230                editor.putString(KEY_VIDEO_DURATION, "-1");
231            }
232        }
233        editor.putInt(KEY_VERSION, CURRENT_VERSION);
234        editor.commit();
235    }
236}
237