CameraSettings.java revision 82ded2070a47fff16e1de1c78b516eb25888b91e 
1/*
2 * Copyright (C) 2007 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.camera;
18
19import android.content.SharedPreferences;
20import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
21import android.hardware.Camera.Parameters;
22import android.os.Bundle;
23import android.preference.ListPreference;
24import android.preference.PreferenceActivity;
25
26import java.util.ArrayList;
27import java.util.StringTokenizer;
28
29/**
30 *  CameraSettings
31 */
32public class CameraSettings extends PreferenceActivity implements
33        OnSharedPreferenceChangeListener {
34    public static final String KEY_VIDEO_QUALITY =
35            "pref_camera_videoquality_key";
36    public static final String KEY_VIDEO_DURATION =
37            "pref_camera_video_duration_key";
38    public static final String KEY_WHITE_BALANCE =
39            "pref_camera_whitebalance_key";
40    public static final String KEY_EFFECT = "pref_camera_effect_key";
41    public static final String KEY_BRIGHTNESS = "pref_camera_brightness_key";
42    public static final String KEY_PICTURE_SIZE = "pref_camera_picturesize_key";
43    public static final String KEY_JPEG_QUALITY = "pref_camera_jpegquality_key";
44    public static final String KEY_FOCUS_MODE = "pref_camera_focusmode_key";
45    public static final String KEY_ISO = "pref_camera_iso_key";
46    public static final boolean DEFAULT_VIDEO_QUALITY_VALUE = true;
47    public static final int DEFAULT_VIDEO_DURATION_VALUE = 1;  // 1 minute
48
49    private ListPreference mVideoQuality;
50    private ListPreference mVideoDuration;
51    private ListPreference mWhiteBalance;
52    private ListPreference mEffect;
53    private ListPreference mBrightness;
54    private ListPreference mPictureSize;
55    private ListPreference mJpegQuality;
56    private ListPreference mFocusMode;
57    private ListPreference mIso;
58    private Parameters mParameters;
59
60    @Override
61    public void onCreate(Bundle icicle) {
62        super.onCreate(icicle);
63        addPreferencesFromResource(R.xml.camera_preferences);
64
65        initUI();
66    }
67
68    @Override
69    protected void onResume() {
70        super.onResume();
71
72        updateVideoQualitySummary();
73        updateVideoDurationSummary();
74        updateWhiteBalanceSummary();
75        updateEffectSummary();
76        updateBrightnessSummary();
77        updatePictureSizeSummary();
78        updateJpegQualitySummary();
79        updateFocusModeSummary();
80        updateIsoSummary();
81    }
82
83    private void initUI() {
84        mVideoQuality = (ListPreference) findPreference(KEY_VIDEO_QUALITY);
85        mVideoDuration = (ListPreference) findPreference(KEY_VIDEO_DURATION);
86        mWhiteBalance = (ListPreference) findPreference(KEY_WHITE_BALANCE);
87        mEffect = (ListPreference) findPreference(KEY_EFFECT);
88        mBrightness = (ListPreference) findPreference(KEY_BRIGHTNESS);
89
90        mPictureSize = (ListPreference) findPreference(KEY_PICTURE_SIZE);
91        mJpegQuality = (ListPreference) findPreference(KEY_JPEG_QUALITY);
92        mFocusMode = (ListPreference) findPreference(KEY_FOCUS_MODE);
93        mIso = (ListPreference) findPreference(KEY_ISO);
94        getPreferenceScreen().getSharedPreferences().
95                registerOnSharedPreferenceChangeListener(this);
96
97        // Get parameters.
98        android.hardware.Camera device = android.hardware.Camera.open();
99        mParameters = device.getParameters();
100        device.release();
101
102        // Create white balance settings.
103        createSettings(mWhiteBalance, Camera.SUPPORTED_WHITE_BALANCE,
104                       R.array.pref_camera_whitebalance_entries,
105                       R.array.pref_camera_whitebalance_entryvalues);
106
107        // Create effect settings.
108        createSettings(mEffect, Camera.SUPPORTED_EFFECT,
109                       R.array.pref_camera_effect_entries,
110                       R.array.pref_camera_effect_entryvalues);
111
112        // Create brightness settings.
113        createSettings(mBrightness, Camera.SUPPORTED_BRIGHTNESS,
114                       R.array.pref_camera_brightness_entries,
115                       R.array.pref_camera_brightness_entryvalues);
116
117        // Create picture size settings.
118        createSettings(mPictureSize, Camera.SUPPORTED_PICTURE_SIZE,
119                       R.array.pref_camera_picturesize_entries,
120                       R.array.pref_camera_picturesize_entryvalues);
121
122        // Create iso settings.
123        createSettings(mIso, Camera.SUPPORTED_ISO,
124                       R.array.pref_camera_iso_entries,
125                       R.array.pref_camera_iso_entryvalues);
126
127        // Set default JPEG quality value if it is empty.
128        if (mJpegQuality.getValue() == null) {
129            mJpegQuality.setValue(getString(
130                R.string.pref_camera_jpegquality_default));
131        }
132
133        // Set default focus mode value if it is empty.
134        if (mFocusMode.getValue() == null) {
135            mFocusMode.setValue(getString(
136                R.string.pref_camera_focusmode_default));
137        }
138    }
139
140    private void createSettings(
141            ListPreference pref, String paramName, int prefEntriesResId,
142            int prefEntryValuesResId) {
143        // Disable the preference if the parameter is not supported.
144        String supportedParamStr = mParameters.get(paramName);
145        if (supportedParamStr == null) {
146            pref.setEnabled(false);
147            return;
148        }
149
150        // Get the supported parameter settings.
151        StringTokenizer tokenizer = new StringTokenizer(supportedParamStr, ",");
152        ArrayList<CharSequence> supportedParam = new ArrayList<CharSequence>();
153        while (tokenizer.hasMoreElements()) {
154            supportedParam.add(tokenizer.nextToken());
155        }
156
157        // Prepare setting entries and entry values.
158        String[] allEntries = getResources().getStringArray(prefEntriesResId);
159        String[] allEntryValues = getResources().getStringArray(
160                prefEntryValuesResId);
161        ArrayList<CharSequence> entries = new ArrayList<CharSequence>();
162        ArrayList<CharSequence> entryValues = new ArrayList<CharSequence>();
163        for (int i = 0, len = allEntryValues.length; i < len; i++) {
164            int found = supportedParam.indexOf(allEntryValues[i]);
165            if (found != -1) {
166                entries.add(allEntries[i]);
167                entryValues.add(allEntryValues[i]);
168            }
169        }
170
171        // Set entries and entry values to list preference.
172        pref.setEntries(entries.toArray(new CharSequence[entries.size()]));
173        pref.setEntryValues(entryValues.toArray(
174                new CharSequence[entryValues.size()]));
175
176        // Set the value to the first entry if it is invalid.
177        String value = pref.getValue();
178        int index = pref.findIndexOfValue(value);
179        if (index == -1) {
180            pref.setValueIndex(0);
181        }
182    }
183
184    private void updateVideoQualitySummary() {
185        mVideoQuality.setSummary(mVideoQuality.getEntry());
186    }
187
188    private void updateVideoDurationSummary() {
189        mVideoDuration.setSummary(mVideoDuration.getEntry());
190    }
191
192    private void updateWhiteBalanceSummary() {
193        mWhiteBalance.setSummary(mWhiteBalance.getEntry());
194    }
195
196    private void updateEffectSummary() {
197        mEffect.setSummary(mEffect.getEntry());
198    }
199
200    private void updateBrightnessSummary() {
201        mBrightness.setSummary(mBrightness.getEntry());
202    }
203
204    private void updatePictureSizeSummary() {
205        mPictureSize.setSummary(mPictureSize.getEntry());
206    }
207
208    private void updateJpegQualitySummary() {
209        mJpegQuality.setSummary(mJpegQuality.getEntry());
210    }
211
212    private void updateFocusModeSummary() {
213        mFocusMode.setSummary(mFocusMode.getEntry());
214    }
215
216    private void updateIsoSummary() {
217        mIso.setSummary(mIso.getEntry());
218    }
219
220    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
221            String key) {
222        if (key.equals(KEY_VIDEO_QUALITY)) {
223            updateVideoQualitySummary();
224        } else if (key.equals(KEY_VIDEO_DURATION)) {
225            updateVideoDurationSummary();
226        } else if (key.equals(KEY_WHITE_BALANCE)) {
227            updateWhiteBalanceSummary();
228        } else if (key.equals(KEY_EFFECT)) {
229            updateEffectSummary();
230        } else if (key.equals(KEY_PICTURE_SIZE)) {
231            updatePictureSizeSummary();
232        } else if (key.equals(KEY_JPEG_QUALITY)) {
233            updateJpegQualitySummary();
234        } else if (key.equals(KEY_FOCUS_MODE)) {
235            updateFocusModeSummary();
236        } else if (key.equals(KEY_BRIGHTNESS)) {
237            updateBrightnessSummary();
238        } else if (key.equals(KEY_ISO)) {
239            updateIsoSummary();
240        }
241    }
242}
243