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/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.camera;
import java.util.ArrayList;
import java.util.StringTokenizer;
import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.hardware.Camera.Parameters;
import android.os.Bundle;
import android.preference.ListPreference;
import android.preference.PreferenceActivity;
import android.util.Log;
/**
* CameraSettings
*/
public class CameraSettings extends PreferenceActivity implements
OnSharedPreferenceChangeListener {
public static final String KEY_VIDEO_QUALITY =
"pref_camera_videoquality_key";
public static final String KEY_WHITE_BALANCE =
"pref_camera_whitebalance_key";
public static final String KEY_EFFECT = "pref_camera_effect_key";
public static final boolean DEFAULT_VIDEO_QUALITY_VALUE = true;
private ListPreference mVideoQuality;
private ListPreference mWhiteBalance;
private ListPreference mEffect;
private Parameters mParameters;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
addPreferencesFromResource(R.xml.camera_preferences);
initUI();
}
@Override
protected void onResume() {
super.onResume();
updateVideoQualitySummary();
updateWhiteBalanceSummary();
updateEffectSummary();
}
private void initUI() {
mVideoQuality = (ListPreference) findPreference(KEY_VIDEO_QUALITY);
mWhiteBalance = (ListPreference) findPreference(KEY_WHITE_BALANCE);
mEffect = (ListPreference) findPreference(KEY_EFFECT);
getPreferenceScreen().getSharedPreferences().
registerOnSharedPreferenceChangeListener(this);
// Get parameters.
android.hardware.Camera device = android.hardware.Camera.open();
mParameters = device.getParameters();
device.release();
// Create white balance settings.
createSettings(mWhiteBalance, Camera.SUPPORTED_WHITE_BALANCE,
R.array.pref_camera_whitebalance_entries,
R.array.pref_camera_whitebalance_entryvalues);
// Create effect settings.
createSettings(mEffect, Camera.SUPPORTED_EFFECT,
R.array.pref_camera_effect_entries,
R.array.pref_camera_effect_entryvalues);
}
private void createSettings(
ListPreference pref, String paramName, int prefEntriesResId,
int prefEntryValuesResId) {
// Get the supported parameter settings.
String supportedParamStr = mParameters.get(paramName);
StringTokenizer tokenizer = new StringTokenizer(supportedParamStr, ",");
ArrayList<CharSequence> supportedParam = new ArrayList<CharSequence>();
while (tokenizer.hasMoreElements()) {
supportedParam.add(tokenizer.nextToken());
}
// Prepare setting entries and entry values.
String[] allEntries = getResources().getStringArray(prefEntriesResId);
String[] allEntryValues = getResources().getStringArray(
prefEntryValuesResId);
ArrayList<CharSequence> entries = new ArrayList<CharSequence>();
ArrayList<CharSequence> entryValues = new ArrayList<CharSequence>();
for (int i = 0, len = allEntryValues.length; i < len; i++) {
int found = supportedParam.indexOf(allEntryValues[i]);
if (found != -1) {
entries.add(allEntries[i]);
entryValues.add(allEntryValues[i]);
}
}
// Set entries and entry values to list preference.
pref.setEntries(entries.toArray(new CharSequence[entries.size()]));
pref.setEntryValues(entryValues.toArray(
new CharSequence[entryValues.size()]));
// Set the value to the first entry if it is invalid.
String value = pref.getValue();
int index = pref.findIndexOfValue(value);
if (index == -1) {
pref.setValueIndex(0);
}
}
private void updateVideoQualitySummary() {
mVideoQuality.setSummary(mVideoQuality.getEntry());
}
private void updateWhiteBalanceSummary() {
// Set preference summary.
mWhiteBalance.setSummary(mWhiteBalance.getEntry());
}
private void updateEffectSummary() {
// Set preference summary.
mEffect.setSummary(mEffect.getEntry());
}
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
String key) {
if (key.equals(KEY_VIDEO_QUALITY)) {
updateVideoQualitySummary();
} else if (key.equals(KEY_WHITE_BALANCE)) {
updateWhiteBalanceSummary();
} else if (key.equals(KEY_EFFECT)) {
updateEffectSummary();
}
}
}
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