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package com.android.camera;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.graphics.drawable.Drawable;
import android.hardware.Camera.Parameters;
import android.hardware.Camera.Size;
import android.os.SystemProperties;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceGroup;
import android.preference.PreferenceManager;
import android.preference.PreferenceScreen;
import android.util.Log;
import java.util.ArrayList;
import java.util.List;
public class CameraSettings {
private static final int FIRST_REQUEST_CODE = 100;
private static final int NOT_FOUND = -1;
public static final String KEY_VERSION = "pref_version_key";
public static final String KEY_RECORD_LOCATION =
"pref_camera_recordlocation_key";
public static final String KEY_VIDEO_QUALITY =
"pref_camera_videoquality_key";
public static final String KEY_VIDEO_DURATION =
"pref_camera_video_duration_key";
public static final String KEY_PICTURE_SIZE = "pref_camera_picturesize_key";
public static final String KEY_JPEG_QUALITY = "pref_camera_jpegquality_key";
public static final String KEY_FOCUS_MODE = "pref_camera_focusmode_key";
public static final String KEY_FLASH_MODE = "pref_camera_flashmode_key";
public static final String KEY_COLOR_EFFECT = "pref_camera_coloreffect_key";
public static final String KEY_WHITE_BALANCE =
"pref_camera_whitebalance_key";
public static final String KEY_SCENE_MODE = "pref_camera_scenemode_key";
public static final int CURRENT_VERSION = 1;
// max mms video duration in seconds.
public static final int MMS_VIDEO_DURATION =
SystemProperties.getInt("ro.media.enc.lprof.duration", 60);
public static final boolean DEFAULT_VIDEO_QUALITY_VALUE = true;
// MMS video length
public static final int DEFAULT_VIDEO_DURATION_VALUE = -1;
@SuppressWarnings("unused")
private static final String TAG = "CameraSettings";
private final Context mContext;
private final Parameters mParameters;
private final PreferenceManager mManager;
public CameraSettings(Activity activity, Parameters parameters) {
mContext = activity;
mParameters = parameters;
mManager = new PreferenceManager(activity, FIRST_REQUEST_CODE);
}
public PreferenceScreen getPreferenceScreen(int preferenceRes) {
PreferenceScreen screen = mManager.createPreferenceScreen(mContext);
mManager.inflateFromResource(mContext, preferenceRes, screen);
initPreference(screen);
return screen;
}
public static void initialCameraPictureSize(
Context context, Parameters parameters) {
// When launching the camera app first time, we will set the picture
// size to the first one in the list defined in "arrays.xml" and is also
// supported by the driver.
List<Size> supported = parameters.getSupportedPictureSizes();
if (supported == null) return;
for (String candidate : context.getResources().getStringArray(
R.array.pref_camera_picturesize_entryvalues)) {
if (setCameraPictureSize(candidate, supported, parameters)) {
SharedPreferences.Editor editor = PreferenceManager
.getDefaultSharedPreferences(context).edit();
editor.putString(KEY_PICTURE_SIZE, candidate);
editor.commit();
return;
}
}
}
public static void removePreferenceFromScreen(
PreferenceScreen screen, String key) {
Preference pref = screen.findPreference(key);
if (pref == null) {
Log.i(TAG, "No preference found based the key : " + key);
throw new IllegalArgumentException();
} else {
removePreference(screen, pref);
}
}
public static boolean setCameraPictureSize(
String candidate, List<Size> supported, Parameters parameters) {
int index = candidate.indexOf('x');
if (index == NOT_FOUND) return false;
int width = Integer.parseInt(candidate.substring(0, index));
int height = Integer.parseInt(candidate.substring(index + 1));
for (Size size: supported) {
if (size.width == width && size.height == height) {
parameters.setPictureSize(width, height);
return true;
}
}
return false;
}
private void initPreference(PreferenceScreen screen) {
ListPreference videoDuration =
(ListPreference) screen.findPreference(KEY_VIDEO_DURATION);
ListPreference pictureSize =
(ListPreference) screen.findPreference(KEY_PICTURE_SIZE);
ListPreference whiteBalance =
(ListPreference) screen.findPreference(KEY_WHITE_BALANCE);
ListPreference colorEffect =
(ListPreference) screen.findPreference(KEY_COLOR_EFFECT);
ListPreference sceneMode =
(ListPreference) screen.findPreference(KEY_SCENE_MODE);
ListPreference flashMode =
(ListPreference) screen.findPreference(KEY_FLASH_MODE);
ListPreference focusMode =
(ListPreference) screen.findPreference(KEY_FOCUS_MODE);
// Since the screen could be loaded from different resources, we need
// to check if the preference is available here
if (videoDuration != null) {
// Modify video duration settings.
// The first entry is for MMS video duration, and we need to fill
// in the device-dependent value (in seconds).
CharSequence[] entries = videoDuration.getEntries();
entries[0] = String.format(
entries[0].toString(), MMS_VIDEO_DURATION);
}
// Filter out unsupported settings / options
if (pictureSize != null) {
filterUnsupportedOptions(screen, pictureSize, sizeListToStringList(
mParameters.getSupportedPictureSizes()));
}
if (whiteBalance != null) {
filterUnsupportedOptions(screen,
whiteBalance, mParameters.getSupportedWhiteBalance());
}
if (colorEffect != null) {
filterUnsupportedOptions(screen,
colorEffect, mParameters.getSupportedColorEffects());
}
if (sceneMode != null) {
filterUnsupportedOptions(screen,
sceneMode, mParameters.getSupportedSceneModes());
}
if (flashMode != null) {
filterUnsupportedOptions(screen,
flashMode, mParameters.getSupportedFlashModes());
}
if (focusMode != null) {
filterUnsupportedOptions(screen,
focusMode, mParameters.getSupportedFocusModes());
}
}
private static boolean removePreference(PreferenceGroup group,
Preference remove) {
if (group.removePreference(remove)) return true;
for (int i = 0; i < group.getPreferenceCount(); i++) {
final Preference child = group.getPreference(i);
if (child instanceof PreferenceGroup) {
if (removePreference((PreferenceGroup) child, remove)) {
return true;
}
}
}
return false;
}
private void filterUnsupportedOptions(PreferenceScreen screen,
ListPreference pref, List<String> supported) {
CharSequence[] allEntries = pref.getEntries();
// Remove the preference if the parameter is not supported or there is
// only one options for the settings.
if (supported == null || supported.size() <= 1) {
removePreference(screen, pref);
return;
}
CharSequence[] allEntryValues = pref.getEntryValues();
Drawable[] allIcons = (pref instanceof IconListPreference)
? ((IconListPreference) pref).getIcons()
: null;
ArrayList<CharSequence> entries = new ArrayList<CharSequence>();
ArrayList<CharSequence> entryValues = new ArrayList<CharSequence>();
ArrayList<Drawable> icons =
allIcons == null ? null : new ArrayList<Drawable>();
for (int i = 0, len = allEntryValues.length; i < len; i++) {
if (supported.indexOf(allEntryValues[i].toString()) != NOT_FOUND) {
entries.add(allEntries[i]);
entryValues.add(allEntryValues[i]);
if (allIcons != null) icons.add(allIcons[i]);
}
}
// Set entries and entry values to list preference.
int size = entries.size();
pref.setEntries(entries.toArray(new CharSequence[size]));
pref.setEntryValues(entryValues.toArray(new CharSequence[size]));
if (allIcons != null) {
((IconListPreference) pref)
.setIcons(icons.toArray(new Drawable[size]));
}
// Set the value to the first entry if it is invalid.
String value = pref.getValue();
if (pref.findIndexOfValue(value) == NOT_FOUND) {
pref.setValueIndex(0);
}
}
private static List<String> sizeListToStringList(List<Size> sizes) {
ArrayList<String> list = new ArrayList<String>();
for (Size size : sizes) {
list.add(String.format("%dx%d", size.width, size.height));
}
return list;
}
public static void upgradePreferences(SharedPreferences pref) {
int version;
try {
version = pref.getInt(KEY_VERSION, 0);
} catch (Exception ex) {
version = 0;
}
if (version == CURRENT_VERSION) return;
SharedPreferences.Editor editor = pref.edit();
if (version == 0) {
// For old version, change 1 to 10 for video duration preference.
if (pref.getString(KEY_VIDEO_DURATION, "1").equals("1")) {
editor.putString(KEY_VIDEO_DURATION, "10");
}
}
editor.putInt(KEY_VERSION, CURRENT_VERSION);
editor.commit();
}
}
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