今天给大家分享下关于修改MTK平台下系统首次开机的默认屏幕背光亮度，系统语言默认英语情况下修改日期格式，修改拍照属性，具体修改的地方不清楚或者没人告知的 话，请参照之前几篇博客的方法分享，现在直接进入主题 首先我们来修改第一次开机的屏幕亮度 ①修改首次开机的系统默认屏幕背光亮度，我是在该java下修改的------(把注释的地方都去掉，因为注释的地方都是修改了的) packages\apps\Settings\src\com.mediatek.settings\RestoreRotationReceiver.java ~~~ // private SharedPreferences mSharedPreferences; @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); Log.v("RestoreRotationReceiver_IPO", action); // mSharedPreferences = context.getSharedPreferences("walpad_first_run",Context.MODE_PRIVATE); if (action.equals(Intent.ACTION_BOOT_COMPLETED) || action.equals("android.intent.action.ACTION_BOOT_IPO")) { sRestoreRetore = Settings.System.getInt(context .getContentResolver(), Settings.System.ACCELEROMETER_ROTATION_RESTORE, 0) != 0; // Engineer-Jsp add Unknown sources and Usb debugging default true if (android.os.SystemProperties.isWalPadVersion() && !isFirstRunSettings(context)) { // reboot first default unkonwn sources check Settings.Global.putInt(context.getContentResolver(), Settings.Global.INSTALL_NON_MARKET_APPS,1); // reboot first default usb debugging check Settings.Global.putInt(context.getContentResolver(),Settings.Global.ADB_ENABLED, 1); // save first reboot falgs boolean // mSharedPreferences.edit().putString("isfirstrun", String.valueOf(true)).commit(); // firstrun defaulr birghtness value for 100% // setWalpadCFirstRunDefaultBrightness(context); } if (sRestoreRetore) { Settings.System.putInt(context.getContentResolver(), Settings.System.ACCELEROMETER_ROTATION, 1); Settings.System.putInt(context.getContentResolver(), Settings.System.ACCELEROMETER_ROTATION_RESTORE, 0); } } } /** * ***- MTK-6582-8382© -*** * isFirstRunSettings(Context context) * walpad c firstrun need default false * Engineer-Jsp add * */ public boolean isFirstRunSettings(Context context){ if (TextUtils.isEmpty(mSharedPreferences.getString("isfirstrun", ""))) { mSharedPreferences.edit() .putString("isfirstrun", String.valueOf(false)) .commit(); } return Boolean.valueOf(mSharedPreferences.getString("isfirstrun", "")); } /** * ***- MTK-6582-8382© -*** * setWalpadCFirstRunDefaultBrightness(Context context) * walpad c firstrun need default settings brightness value for 100% * Engineer-Jsp add * */ public void setWalpadCFirstRunDefaultBrightness(Context context){ try{ Uri uri = Settings.System.getUriFor(Settings.System.SCREEN_BRIGHTNESS); Settings.System.putInt(context.getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, 255); context.getContentResolver().notifyChange(uri, null); } catch (Exception localException){ localException.printStackTrace(); } } ~~~ 背光值最大 255 ，所以我们设置到最大就OK，意思是100%屏幕亮度，执行条件是我自己写的，分别是 android.os.SystemProperties.isWalPadVersion()，这个函数也是 我在系统代码里自己添加的，前面几篇博客也有提到，这里就不细说了，首次开机的记录，因为我们只需要第一次开机设置100%的屏幕亮度 ②日期格式修改 packages\apps\Settings\src\com\android\settings\DateTimeSettings.java ~~~ @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); addPreferencesFromResource(R.xml.date_time_prefs); initUI(); /// M: get plug in and move roaming time setting into date and time settings @{ mExt = UtilsExt.getDateTimeSettingsPlugin(getActivity()); mExt.customizePreferenceScreen(getActivity(), getPreferenceScreen()); /// @} } ~~~ 修改initUI之前的原始系统代码: ~~~ private void initUI() { boolean autoTimeEnabled = getAutoState(Settings.Global.AUTO_TIME); boolean autoTimeZoneEnabled = getAutoState(Settings.Global.AUTO_TIME_ZONE); ///M: MTK use ListPreference instead of google CheckboxPerference ...... String [] dateFormats = getResources().getStringArray(R.array.date_format_values); String [] formattedDates = new String[dateFormats.length]; String currentFormat = getDateFormat(); // Initialize if DATE_FORMAT is not set in the system settings // This can happen after a factory reset (or data wipe) if (currentFormat == null) { currentFormat = ""; } // Prevents duplicated values on date format selector. mDummyDate.set(mDummyDate.get(Calendar.YEAR), mDummyDate.DECEMBER, 31, 13, 0, 0); for (int i = 0; i < formattedDates.length; i++) { String formatted = DateFormat.getDateFormatForSetting(getActivity(), dateFormats[i]) .format(mDummyDate.getTime()); if (dateFormats[i].length() == 0) { formattedDates[i] = getResources(). getString(R.string.normal_date_format, formatted); } else { formattedDates[i] = formatted; } } mDateFormat.setEntries(formattedDates); mDateFormat.setEntryValues(R.array.date_format_values); mDateFormat.setValue(currentFormat); ...... } ~~~ 原始getDateFormat(): ~~~ private String getDateFormat() { return Settings.System.getString(getContentResolver(), Settings.System.DATE_FORMAT); } ~~~ 修改如下（修改为日期格式默认日月年）： initUI: ~~~ private void initUI() { boolean autoTimeEnabled = getAutoState(Settings.Global.AUTO_TIME); boolean autoTimeZoneEnabled = getAutoState(Settings.Global.AUTO_TIME_ZONE); ///M: MTK use ListPreference instead of google CheckboxPerference ...... String [] dateFormats = getResources().getStringArray(R.array.date_format_values); String [] formattedDates = new String[dateFormats.length]; String currentFormat = getDateFormat(dateFormats[2]); // Initialize if DATE_FORMAT is not set in the system settings // This can happen after a factory reset (or data wipe) if (currentFormat == null) { currentFormat = ""; } // Prevents duplicated values on date format selector. mDummyDate.set(mDummyDate.get(Calendar.YEAR), mDummyDate.DECEMBER, 31, 13, 0, 0); for (int i = 0; i < formattedDates.length; i++) { String formatted = DateFormat.getDateFormatForSetting(getActivity(), dateFormats[i]) .format(mDummyDate.getTime()); if (dateFormats[i].length() == 0) { formattedDates[i] = getResources(). getString(R.string.normal_date_format, formatted); } else { formattedDates[i] = formatted; } } mDateFormat.setEntries(formattedDates); mDateFormat.setEntryValues(R.array.date_format_values); mDateFormat.setValue(currentFormat); ...... } ~~~ 修改DateFormat(): ~~~ private String getDateFormat(String format) { // Engineer-Jsp add walpad c default date format if(android.os.SystemProperties.isWalPadVersion()){ Settings.System.putString(getContentResolver(), Settings.System.DATE_FORMAT, format); } return Settings.System.getString(getContentResolver(), Settings.System.DATE_FORMAT); } ~~~ R.array.date_format_values： ~~~ <string-array name="date_format_values" translatable="false"> <!-- The blank item means to use whatever the locale calls for. --> <item></item> <item>MM-dd-yyyy</item> <item>dd-MM-yyyy</item> <item>yyyy-MM-dd</item> <item>EE-MMM-d-yyyy</item> <item>EE-d-MMM-yyyy</item> <item>yyyy-MMM-d-EE</item> </string-array> ~~~ dateFormats[2] == <item>dd-MM-yyyy</item> ③picture makeer model ，修改 buildinfo.sh 文件，model\product 属性 修改之前：  修改之后：  第③是编译之后的效果图，前面两个的效果图就没有贴出来了

今天给大家分享MTK平台系统编程与修改的另一个部分，分别是输入法校准、自动校准默认关、首字母大写默认开、按键声音默认关、Voice Control 移除系统中文，默认 英文，下面一个一个的介绍给大家 ①Language & input> Android Keyboard>Auto Correction > Uncheck as Default(Off) 语言输入-安卓键盘-自动校准默认关 根据红色框关键词用命令行在settings下执行热词检索：  ~~~ .../mnt/disk3/jsp/xxx8382$ find packages/apps/Settings/ -name "*.xml" | xargs grep "Very aggressive" -l ~~~ 搜索无果，于是扩大搜索范围，键入如下命令行 ~~~ .../mnt/disk3/jsp/xxx8382$ find packages/ -name "*.xml" | xargs grep "Very aggressive" -l packages/inputmethods/LatinIME/java/res/values/strings.xml packages/inputmethods/LatinIME/java/res/values-en-rIN/strings.xml packages/inputmethods/LatinIME/java/res/values-en-rGB/strings.xml ~~~ 得到3条结果，进入查看得到热词 auto_correction_threshold_mode_very_aggressive 搜索热词 ~~~ android5@ubuntu2015:/mnt/disk3/jsp/xxx8382$ find packages/ -name "*.xml" | xargs grep "auto_correction_threshold_mode_very_aggressive" -l packages/inputmethods/LatinIME/java/res/values-es/strings.xml packages/inputmethods/LatinIME/java/res/values-ms-rMY/strings.xml packages/inputmethods/LatinIME/java/res/values-my/strings.xml packages/inputmethods/LatinIME/java/res/values-ky-rKG/strings.xml packages/inputmethods/LatinIME/java/res/values-hu/strings.xml packages/inputmethods/LatinIME/java/res/values-ne-rNP/strings.xml packages/inputmethods/LatinIME/java/res/values-pl/strings.xml packages/inputmethods/LatinIME/java/res/values-lo-rLA/strings.xml packages/inputmethods/LatinIME/java/res/values/strings.xml packages/inputmethods/LatinIME/java/res/values/config-auto-correction-thresholds.xml ~~~ 查看 config-auto-correction-thresholds.xml 文件 ，查找如下代码 ~~~ <!-- The index of the auto correction threshold values array. --> <string name="auto_correction_threshold_mode_index_off" translatable="false">0</string> <string name="auto_correction_threshold_mode_index_modest" translatable="false">1</string> <string name="auto_correction_threshold_mode_index_aggressive" translatable="false">2</string> <string name="auto_correction_threshold_mode_index_very_aggressive" translatable="false">3</string> <!-- The array of the auto correction threshold settings values. --> <string-array name="auto_correction_threshold_mode_indexes" translatable="false"> <item>@string/auto_correction_threshold_mode_index_off</item> <item>@string/auto_correction_threshold_mode_index_modest</item> <item>@string/auto_correction_threshold_mode_index_aggressive</item> <item>@string/auto_correction_threshold_mode_index_very_aggressive</item> </string-array> <!-- The array of the human readable auto correction threshold settings entries. --> <string-array name="auto_correction_threshold_modes" translatable="false"> <item>@string/auto_correction_threshold_mode_off</item> <item>@string/auto_correction_threshold_mode_modest</item> <item>@string/auto_correction_threshold_mode_aggressive</item> <item>@string/auto_correction_threshold_mode_very_aggressive</item> </string-array> ~~~ 继续热词搜索追踪 ~~~ jsp@ubuntu2015:/mnt/disk3/jsp/RMT8382$ find packages/ -name "*.xml" | xargs grep "auto_correction_threshold_modes" -l packages/inputmethods/LatinIME/java/res/values/config-auto-correction-thresholds.xml packages/inputmethods/LatinIME/java/res/xml/prefs_screen_correction.xml ~~~ 查看 prefs_screen_correction.xml 文件 修改如下，运用 Beyond Compare 工具直接copy ~~~ <ListPreference android:key="auto_correction_threshold" android:title="@string/auto_correction" android:summary="@string/auto_correction_summary" android:entryValues="@array/auto_correction_threshold_mode_indexes" android:entries="@array/auto_correction_threshold_modes" android:defaultValue="@string/auto_correction_threshold_mode_index_off" android:persistent="true" /> ~~~ 就可以重新修改默认值，重新编译工程，刷机即可看到效果 重新刷机第一次开机之后的效果图：  ②系统输入法自动大写默认开/输入法按键音效默认关/输入法拼写校准默认开-修改 热词检索命令 ~~~ android5@ubuntu2015:/mnt/disk3/jsp/RMT8382$ find packages/ -name "*.xml" | xargs grep "按键音效" -l packages/inputmethods/LatinIME/java/res/values-zh-rCN/strings.xml android5@ubuntu2015:/mnt/disk3/jsp/RMT8382$ find packages/ -name "*.xml" | xargs grep "sound_on_keypress" -l packages/inputmethods/LatinIME/java/res/values-es/strings.xml packages/inputmethods/LatinIME/java/res/values-ms-rMY/strings.xml packages/inputmethods/LatinIME/java/res/values-my/strings.xml packages/inputmethods/LatinIME/java/res/values-ky-rKG/strings.xml packages/inputmethods/LatinIME/java/res/values-hu/strings.xml packages/inputmethods/LatinIME/java/res/values-ne-rNP/strings.xml packages/inputmethods/LatinIME/java/res/values-pl/strings.xml packages/inputmethods/LatinIME/java/res/values-lo-rLA/strings.xml packages/inputmethods/LatinIME/java/res/values/strings.xml packages/inputmethods/LatinIME/java/res/values-es-rUS/strings.xml packages/inputmethods/LatinIME/java/res/values-bn/strings.xml packages/inputmethods/LatinIME/java/res/values-tl/strings.xml packages/inputmethods/LatinIME/java/res/xml/prefs_screen_preferences.xml ~~~ 查看 prefs_screen_preferences.xml 文件，检索热词 ~~~ jsp@ubuntu2015:/mnt/disk3/jsp/xxx8382$ find packages/ -name "*.xml" | xargs grep "config_default_sound_enabled" -l packages/inputmethods/LatinIME/java/res/values/config-per-form-factor.xml ~~~ 其实在prefs_screen_preferences.xml 可以直接修改，根据需求修改如下： ~~~ #首字母大写开 <CheckBoxPreference android:key="auto_cap" android:title="@string/auto_cap" android:summary="@string/auto_cap_summary" android:defaultValue="true" android:persistent="true" /> #输入法按键音效关 <CheckBoxPreference android:key="sound_on" android:title="@string/sound_on_keypress" android:defaultValue="false" android:persistent="true" /> #输入法拼写校准默认开 <CheckBoxPreference android:key="vibrate_on" android:title="@string/vibrate_on_keypress" android:defaultValue="@bool/config_default_vibration_enabled" android:persistent="true" /> ~~~ 刷机第一次启动的效果：  ③setting - voice control - language for voice control  -Keep only english 设置-声音控制-语言只留英语去掉中文 最初效果图，默认简体中文： 定位到settings下检索关键字 ~~~ jsp@ubuntu2015:/mnt/disk3/jsp/xxx8382$ find packages/apps/Settings/ -type f|xargs grep "繁體中文" -l ~~~ 搜索无果，扩大检索范围 ~~~ jsp@ubuntu2015:/mnt/disk3/jsp/xxx8382$ find ./ -type f|xargs grep "繁體中文" -l ~~~ 发现结果根本不是想要的，而且由于源码较大，所以这个果断放弃，采用另一个方案，使用Eclipse工具来检索，这是笔者介绍给大家的一个非常实用的方法，以后绝对会用 得着不管是检索资料还是反编译apk等，都很实用 连接USB打开debugging，打开Eclipse → 打开 DDMS 点击设备 如下界面操作：  检索包名 com.mediatek.voicecommand ~~~ android5@ubuntu2015:/mnt/disk3/jsp/RMT8382$ find -name "*.xml"|xargs grep "com.mediatek.voicecommand" -l ./vendor/mediatek/proprietary/packages/apps/VoiceCommand/tests/AndroidManifest.xml ./vendor/mediatek/proprietary/packages/apps/VoiceCommand/res/xml/voice_ui_available_preference.xml ./vendor/mediatek/proprietary/packages/apps/VoiceCommand/res/xml/voiceprocessinfo.xml ./vendor/mediatek/proprietary/packages/apps/VoiceCommand/AndroidManifest.xml ~~~ 得到如上结果，大大缩小我们要查找的范围，继续之前的检索 ~~~ android5@ubuntu2015:/mnt/disk3/jsp/RMT8382$ find vendor/mediatek/proprietary/packages/apps/VoiceCommand -type f|xargs grep "繁體中文" -l vendor/mediatek/proprietary/packages/apps/VoiceCommand/res/xml/voicelanguage.xml ~~~ 得到 voicelanguage.xml 资源文件，继续下一步检索 ~~~ android5@ubuntu2015:/mnt/disk3/jsp/RMT8382$ find -name "*.java"|xargs grep "voicelanguage" -l ./out/target/common/R/com/mediatek/voicecommand/R.java ./out/target/common/obj/APPS/VoiceCommand_intermediates/src/com/mediatek/voicecommand/R.java ~~~ 搜到的都不是想要的，继续检索，在当前目录下，看某个java文件调用了刚刚DDMS解析的 list 资源 id ~~~ android5@ubuntu2015:/mnt/disk3/jsp/RMT8382$ find vendor/mediatek/proprietary/packages/apps/VoiceCommand -name "*.java"|xargs grep "list" -l vendor/mediatek/proprietary/packages/apps/VoiceCommand/tests/src/com/mediatek/voicecommand/tests/VoiceCommandTest.java vendor/mediatek/proprietary/packages/apps/VoiceCommand/src/com/mediatek/voicecommand/ui/settings/VoiceUiSettings.java vendor/mediatek/proprietary/packages/apps/VoiceCommand/src/com/mediatek/voicecommand/mgr/ConfigurationManager.java vendor/mediatek/proprietary/packages/apps/VoiceCommand/src/com/mediatek/voicecommand/mgr/AppDataManager.java vendor/mediatek/proprietary/packages/apps/VoiceCommand/src/com/mediatek/voicecommand/business/VoiceContacts.java vendor/mediatek/proprietary/packages/apps/VoiceCommand/src/com/mediatek/voicecommand/business/VoiceWakeupMode.java vendor/mediatek/proprietary/packages/apps/VoiceCommand/src/com/mediatek/voicecommand/service/VoiceCommandManagerStub.java vendor/mediatek/proprietary/packages/apps/VoiceCommand/src/com/mediatek/voicecommand/cfg/ConfigurationXML.java ~~~ 打开 VoiceUiSettings.java 查看系统代码，检索到相关资源 ~~~ @Override public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) { if (KEY_VOICE_UI_LANGUAGE.equals(preference.getKey())) {// 这就是Preference 被点击之后跳转的选项，也就是Voice Control 选项 Intent intent = new Intent( "com.mediatek.voicecommand.VOICE_CONTROL_LANGUAGE"); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(intent); return true; } else if ...... } ~~~ 根据 Activity action 检索Acticity 名称 ~~~ jsp@ubuntu2015:/mnt/disk3/jsp/xxx8382$ find vendor/mediatek/proprietary/packages/apps/VoiceCommand -name "*.xml"|xargs grep "com.mediatek.voicecommand.VOICE_CONTROL_LANGUAGE" -l vendor/mediatek/proprietary/packages/apps/VoiceCommand/AndroidManifest.xml ~~~ 得到如下 Activity : ~~~ <activity android:name=".ui.settings.VoiceUiAvailableLanguageActivity" android:label="@string/voice_ui_language_title" android:taskAffinity="com.android.settings" android:configChanges="orientation|keyboardHidden|keyboard|navigation" android:parentActivityName=".ui.settings.VoiceUiSettings"> <intent-filter> <action android:name="com.mediatek.voicecommand.VOICE_CONTROL_LANGUAGE"/> <category android:name="android.intent.category.DEFAULT"/> </intent-filter> </activity> ~~~ 查看 VoiceUiAvailableLanguageActivity 代码 ~~~ @Override public void onCreate(Bundle savedInstanceState) { Xlog.d(TAG, "OnCreate VoiceUiAvailableLanguageFragment"); super.onCreate(savedInstanceState); addPreferencesFromResource(R.xml.voice_ui_available_langs); mVoiceConfigMgr = ConfigurationManager.getInstance(this); if (mVoiceConfigMgr == null) { Xlog.e(TAG, "ConfigurationManager is null"); return; } mAvailableLangs = mVoiceConfigMgr.getLanguageList(); // 继续查看 ConfigurationManager getLanguageList() 代码 // mDefaultLanguage = mVoiceConfigMgr.getCurrentLanguage();// 这里 mDefaultLanguage int 默认为 0 ...... } } ~~~ ConfigurationManager getLanguageList() 代码 ~~~ public String[] getLanguageList() { int size = mLanguageList.size(); if (size == 0) { return null; } String[] language = new String[size]; // Log.i(VoiceCommandManagerService.TAG, "mLanguageList = "+ size); for (int i = 0; i < size; i++) { language[i] = mLanguageList.get(i).mName; } return language; } ~~~ mLanguageList 变量赋值的地方： ~~~ /* * ConfigurationManager for control configuration * * @param context */ private ConfigurationManager(Context context) { ...... mCurrentLanguageIndex = mConfigurationXML .readVoiceLanguangeFromXml(mLanguageList);// 来自 ConfigurationXML 的 readVoiceLanguangeFromXml 函数 ...... } ~~~ 继续查看 ConfigurationXML 的 readVoiceLanguangeFromXml 函数 ~~~ /** * Read language info from res. * * @param languageList * language list instance */ public int readVoiceLanguangeFromXml( ...... XmlPullParser parser = mContext.getResources().getXml(// 这里就是加载语言选项 xml 的地方，下面贴上 xml 内容 R.xml.voicelanguage); if (parser == null) { Log.e(TAG, "readVoiceLanguangeFromXml Got execption"); return curIndex; } ...... } ~~~ voicelanguage.xml 内容： ~~~ <?xml version="1.0" encoding="UTF-8"?> <!-- Engineer-Jsp add remove 1 and 2 item default 0 --> <Languages> <Language TypeName="English" ID="0" Code="en-US" FileName="keyword/3.xml" /> <DefaultLanguage ID="0" /> </Languages> <!-- <Language TypeName="简体中文" ID="1" Code="zh-CN" FileName="keyword/1.xml" /> <Language TypeName="繁體中文" ID="2" Code="zh-TW" FileName="keyword/2.xml" /> --> ~~~ 这里已经是我改过的，需求是去掉所有中文只留英文选项，修改 TypeName="English" 的 ID 和 DefaultLanguage ID 都为 0 之后保存，继续修改java逻辑 回到我们的 VoiceUiAvailableLanguageActivity ，只需要注释掉几句代码就OK了 ~~~ @Override public void onCreate(Bundle savedInstanceState) { Xlog.d(TAG, "OnCreate VoiceUiAvailableLanguageFragment"); super.onCreate(savedInstanceState); addPreferencesFromResource(R.xml.voice_ui_available_langs); mVoiceConfigMgr = ConfigurationManager.getInstance(this); if (mVoiceConfigMgr == null) { Xlog.e(TAG, "ConfigurationManager is null"); return; } mAvailableLangs = mVoiceConfigMgr.getLanguageList(); // mDefaultLanguage = mVoiceConfigMgr.getCurrentLanguage();//注释此句代码，因为 mDefaultLanguage 默认为0，不再需要其他选项，自己默认为0 ...... } ~~~ ~~~ @Override public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) { if (preference instanceof RadioButtonPreference) { // selectLanguage((RadioButtonPreference) preference); // 注释掉此句，不过不注释也不影响，只是多做了一些操作而已，都是多余的 Xlog.d(TAG, "default language changed to " + mAvailableLangs[mDefaultLanguage]); finish(); } return true; } ~~~ selectLanguage 函数代码： ~~~ private void selectLanguage(RadioButtonPreference preference) { if (mLastSelectedPref != null) { if (mLastSelectedPref == preference) { return; } mLastSelectedPref.setChecked(false); } mDefaultLanguage = Integer.parseInt(preference.getKey().toString()); Xlog.d(TAG, "set default language to " + mAvailableLangs[mDefaultLanguage]); mVoiceConfigMgr.setCurrentLanguage(mDefaultLanguage); preference.setChecked(true); mLastSelectedPref = preference; } ~~~ 最后make自己的系统工程，重新烧录可看效果 效果图： 

MTK 版本蓝牙设置部分有很大修改，L版本去除了蓝牙可见性设置，只有当手机处于蓝牙设置界面（BluetoothSetting）时才会打开可见性，才能被其他手机搜索到，当退出蓝** 牙设置界面时，将关闭可见性。但是，当一直停留在蓝牙设置界面关闭蓝牙，再打开时，即使此时还在蓝牙设置界面，对外也是不可见。这是Google的bug。 如果希望当在蓝牙设置界面时，不管第几次打开蓝牙，蓝牙都能对外可见，修改方式如下： 在BluetoothSettings.java文件的onBluetoothStateChanged方法中，添加如下： ~~~ @Override public void onBluetoothStateChanged(int bluetoothState) { super.onBluetoothStateChanged(bluetoothState); //Engineer-Jsp add by mtk start if( bluetoothState==BluetoothAdapter.STATE_ON) { mInitiateDiscoverable=true; } //Engineer-Jsp add by mtk end updateContent(bluetoothState); } ~~~ 还有一个bug，MTK 版本中，蓝牙只有在蓝牙设置界面（Bluetooth Setting）可见性才会打开，离开此界面蓝牙将对外不可见。如果要修改为只要打开蓝牙，即使离开蓝牙 界面，蓝牙也一直可见，方法如下： packages\apps\settings\src\com\android\settings\bluetooth\BluetoothSettings.java ~~~ @Override public void onPause() { super.onPause(); if (mBluetoothEnabler != null) { mBluetoothEnabler.pause(); } // Engineer-Jsp add by mtk // mLocalAdapter.setScanMode(BluetoothAdapter.SCAN_MODE_CONNECTABLE); if (isUiRestricted()) { return; } getActivity().unregisterReceiver(mReceiver); } ~~~ 注释此句： ~~~ // mLocalAdapter.setScanMode(BluetoothAdapter.SCAN_MODE_CONNECTABLE); ~~~ 添加后使用mmm 的方式编译，编译完后通过snod的方式打包进system.img，然后download到手机中烧录固件测试即可

今天拿到一个客户新的订单需求，大概有40多个需求，今天先讲更改系统的蓝牙/wifi 热点/消息通知/sleep 添加 never选项，分别是： 蓝牙：连接显示名、系统界面显示名字，重命名前的默认名字 wifi 热点：连接名字，重命名前默认 Network name Notification popup ：系统 Notification popup 默认不勾选 休眠添加never选项，默认30s：添加永不休眠，默认30s 首先我们要知道系统默认的蓝牙名字 ANDROID BT Linux input ...> find 你的源码根目录/ -type f|xargs grep "ANDROID BT" -l 这句命令是找出源码下所有带有字符串 ANDROID BT 所在的文件，搜索无果，直接进入源码 packages\apps\Settings\src\com\android\settings\bluetooth\BluetoothSettins.java 跟踪源码找到如下代码 ~~~ @Override public void onResume() { ...... if (mLocalAdapter != null) { updateContent(mLocalAdapter.getBluetoothState()); } } ~~~ 跟踪updateContent函数，修改如下代码 ~~~ if (mMyDevicePreference == null) { mMyDevicePreference = new Preference(getActivity()); } // Engineer-Jsp add default bluetooth name if (android.os.SystemProperties.isWalPadVersion()) { mMyDevicePreference.setSummary(getResources().getString( R.string.bluetooth_is_visible_message, "Walpad C")); }else{ mMyDevicePreference.setSummary(getResources().getString( R.string.bluetooth_is_visible_message, mLocalAdapter.getName())); } mMyDevicePreference.setSelectable(false); ~~~ 其中 isWalpadVersion 函数是我在frameworks/base/core/java/android/os/SystemProperties.java中定义的 ~~~ public static boolean isWalPadVersion(){ return SystemProperties.get("ro.product.model").contains("Walpad"); } ~~~ 根据编译文件设置的客户平板型号定制产品而定，这样写有人可能会觉得多此一举，显的麻烦，但是作为一个系统，能把它做成兼容模式岂不是更好？ 因为下次再有系统定制订单需求，我们只需要修改配置文件和分支就够了，轻松方便，而不需要再去new 代码了 setSummary(...,...)函数就是蓝牙设置打开蓝牙之后在界面显示的效果 R.string.bluetooth.is.visible_message 内容： ~~~ <string name="bluetooth_is_visible_message"><xliff:g id="device_name">%1$s</xliff:g> is visible to nearby devices while Bluetooth Settings is open.</string> ~~~ device_name 即为我们替换的名字，即Walpad C,效果图：  接下来修改重名命选项的蓝牙设备名称，onOptionsItemSelected(MenuItem item) 根据 item 追踪重命名的 Dialog 找到如下逻辑： ~~~ @Override public Dialog onCreateDialog(Bundle savedInstanceState) { ...... mAlertDialog = new AlertDialog.Builder(getActivity()) .setTitle(R.string.bluetooth_rename_device) .setView(createDialogView(deviceName))// 继续追踪createDialogView(deviceName)方法 ...... return mAlertDialog; } ~~~ 根据逻辑，修改如下： ~~~ private View createDialogView(String deviceName) { ...... // Engineer-Jsp add default bluetooth name if (android.os.SystemProperties.isWalPadVersion()) {// 根据model显示名称 mDeviceNameView.setText("Walpad C"); }else{ mDeviceNameView.setText(deviceName); // set initial value before adding listener } ...... return view; } ~~~ 效果图：  连接显示名修改： ~~~ // Engineer-Jsp add default bluetooth name if (android.os.SystemProperties.isWalPadVersion()) { mMyDevicePreference.setSummary(getResources().getString( R.string.bluetooth_is_visible_message, "Walpad C")); mLocalAdapter.setName("Walpad C");//在之前讲到的修改除再添加此句 }else{ mMyDevicePreference.setSummary(getResources().getString( R.string.bluetooth_is_visible_message, mLocalAdapter.getName())); } ~~~ 效果：  修改wifi重命名前的名字，根据信息搜索到源码packages\apps\Settings\src\com\android\settings\wifi\WifiApDialog.java 根据逻辑，查找到如下代码： ~~~ @Override protected void onCreate(Bundle savedInstanceState) { Context context = getContext(); ...... if (mWifiConfig != null) { // Engineer-Jsp add default bluetooth name if (android.os.SystemProperties.isWalPadVersion()) { //根据型号显示ssid mSsid.setText("Walpad C"); }else{ mSsid.setText(mWifiConfig.SSID); } /// M: set selection mSecurity.setSelection(mExt.getSelection(mSecurityTypeIndex)); if (mSecurityTypeIndex == WPA2_INDEX) { mPassword.setText(mWifiConfig.preSharedKey); } ///M: get configured channel @{ mChannel = mWifiConfig.channel; mChannelWidth = mWifiConfig.channelWidth; /// @} } ...... } ~~~ 效果：  连接名字：  修改系统 Notification popup 默认不勾选 搜索关键字：源码目录...>find ./ -name ".xml" | xargs grep "Popup notification" 找到xml文件之后找到对应string name 名称，发现他被一个布局文件调用，packages\apps\Mms\res\xml\notificationpreferences.xml - pref_summary_popup_notification -  defaultValue="false" 把这个默认false，即可 效果：  修改休眠选项默认 30s 添加永不休眠选项： 默认休眠30s修改：frameworks\base\packages\SettingsProvider\res\values\defaults.xml ~~~ <integer name="def_screen_off_timeout">30000</integer> ~~~ 添加永不休眠选项： ~~~ private static final boolean sNeedScreenTimeoutNever = true; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); ...... if (sNeedScreenTimeoutNever && mScreenTimeoutPreference != null) { //rmt add Resources res = getResources(); final String[] entries = res.getStringArray(R.array.screen_timeout_entries); final String[] values = res.getStringArray(R.array.screen_timeout_values); int entriesLength = entries.length; final String[] newEntries = new String[entriesLength + 1]; for (int i = 0; i < entriesLength + 1; i++) { if (i != entriesLength) { newEntries[i] = entries[i]; } else { newEntries[i] = res.getString(R.string.zen_mode_when_never); } } int valuesLength = values.length; final String[] newValues = new String[valuesLength + 1]; for (int i = 0; i < valuesLength + 1; i++) { if (i != valuesLength) { newValues[i] = values[i]; } else { newValues[i] = "2147483647"; } } mScreenTimeoutPreference.setEntries(newEntries); mScreenTimeoutPreference.setEntryValues(newValues); ...... } private void updateTimeoutPreferenceDescription(long currentTimeout) { ...... } else if(currentTimeout == Integer.MAX_VALUE) { //Engineer-Jsp add summary = preference.getContext().getString(R.string.zen_mode_when_never); } ....... } ~~~ 效果： 

客户给了一个内置他们自己apk的需求，定制到Rom里，我们需要在编译系统源码的时候配置好相关的文件即可将apk一起打包到ROM里面，下面我们就来一起打包apk到系统 首先需要在 [device/mediatek/common/device.mk](http://192.168.180.196/gitweb/?p=c/rmt8735_6tb_s_l1.git;a=blob;f=device/mediatek/common/device.mk;h=a87faad6ee23bff8b3bf69820fa9b8d79058d3ec;hb=a87faad6ee23bff8b3bf69820fa9b8d79058d3ec) 配置如下语句 $(call inherit-product-if-exists, vendor/公司名/product/您的命名.mk) 在mk文件里面配置需要内置的apk label eg: ~~~ #apps PRODUCT_PACKAGES += \ BDDataPlan\ Facebook\ MultiLingBengaliPlugin\ Multilingkeyboard\ SHAREit\ Skype\ Viber\ WPSOffice\ WST_WAL_C ~~~ 配置好之后还需要导入 apk文件并且配置宏，就写一个例子吧，也在这个文件夹下写 路径：vendor\公司名\ThirdpartyApps\  配置如下mk文件，没有的自己创建 ~~~ LOCAL_PATH := $(call my-dir) # include $(CLEAR_VARS) LOCAL_MODULE := BDDataPlan LOCAL_MODULE_TAGS := optional LOCAL_MODULE_CLASS := APPS LOCAL_MODULE_PATH := $(TARGET_OUT)/vendor/operator/app #LOCAL_MODULE_PATH := $(TARGET_OUT)/vendor/thirdparty_apps LOCAL_SRC_FILES := $(LOCAL_MODULE).apk LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX) LOCAL_CERTIFICATE := PRESIGNED include $(BUILD_PREBUILT) # include $(CLEAR_VARS) LOCAL_MODULE := Facebook LOCAL_MODULE_TAGS := optional LOCAL_MODULE_CLASS := APPS LOCAL_MODULE_PATH := $(TARGET_OUT)/vendor/operator/app #LOCAL_MODULE_PATH := $(TARGET_OUT)/vendor/thirdparty_apps LOCAL_SRC_FILES := $(LOCAL_MODULE).apk LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX) LOCAL_CERTIFICATE := PRESIGNED include $(BUILD_PREBUILT) # include $(CLEAR_VARS) LOCAL_MODULE := MultiLingBengaliPlugin LOCAL_MODULE_TAGS := optional LOCAL_MODULE_CLASS := APPS LOCAL_MODULE_PATH := $(TARGET_OUT)/vendor/operator/app #LOCAL_MODULE_PATH := $(TARGET_OUT)/vendor/thirdparty_apps LOCAL_SRC_FILES := $(LOCAL_MODULE).apk LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX) LOCAL_CERTIFICATE := PRESIGNED include $(BUILD_PREBUILT) # include $(CLEAR_VARS) LOCAL_MODULE := Multilingkeyboard LOCAL_MODULE_TAGS := optional LOCAL_MODULE_CLASS := APPS #LOCAL_MODULE_PATH := $(TARGET_OUT)/vendor/operator/app LOCAL_MODULE_PATH := $(TARGET_OUT)/vendor/thirdparty_apps LOCAL_SRC_FILES := $(LOCAL_MODULE).apk LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX) LOCAL_CERTIFICATE := PRESIGNED include $(BUILD_PREBUILT) # include $(CLEAR_VARS) LOCAL_MODULE := SHAREit LOCAL_MODULE_TAGS := optional LOCAL_MODULE_CLASS := APPS LOCAL_MODULE_PATH := $(TARGET_OUT)/vendor/operator/app #LOCAL_MODULE_PATH := $(TARGET_OUT)/vendor/thirdparty_apps LOCAL_SRC_FILES := $(LOCAL_MODULE).apk LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX) LOCAL_CERTIFICATE := PRESIGNED include $(BUILD_PREBUILT) # include $(CLEAR_VARS) LOCAL_MODULE := Skype LOCAL_MODULE_TAGS := optional LOCAL_MODULE_CLASS := APPS LOCAL_MODULE_PATH := $(TARGET_OUT)/vendor/operator/app #LOCAL_MODULE_PATH := $(TARGET_OUT)/vendor/thirdparty_apps LOCAL_SRC_FILES := $(LOCAL_MODULE).apk LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX) LOCAL_CERTIFICATE := PRESIGNED include $(BUILD_PREBUILT) # include $(CLEAR_VARS) LOCAL_MODULE := Viber LOCAL_MODULE_TAGS := optional LOCAL_MODULE_CLASS := APPS LOCAL_MODULE_PATH := $(TARGET_OUT)/vendor/operator/app #LOCAL_MODULE_PATH := $(TARGET_OUT)/vendor/thirdparty_apps LOCAL_SRC_FILES := $(LOCAL_MODULE).apk LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX) LOCAL_CERTIFICATE := PRESIGNED include $(BUILD_PREBUILT) # include $(CLEAR_VARS) LOCAL_MODULE := WPSOffice LOCAL_MODULE_TAGS := optional LOCAL_MODULE_CLASS := APPS LOCAL_MODULE_PATH := $(TARGET_OUT)/vendor/operator/app #LOCAL_MODULE_PATH := $(TARGET_OUT)/vendor/thirdparty_apps LOCAL_SRC_FILES := $(LOCAL_MODULE).apk LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX) LOCAL_CERTIFICATE := PRESIGNED include $(BUILD_PREBUILT) # include $(CLEAR_VARS) LOCAL_MODULE := WST_WAL_C LOCAL_MODULE_TAGS := optional LOCAL_MODULE_CLASS := APPS LOCAL_MODULE_PATH := $(TARGET_OUT)/vendor/operator/app #LOCAL_MODULE_PATH := $(TARGET_OUT)/vendor/thirdparty_apps LOCAL_SRC_FILES := $(LOCAL_MODULE).apk LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX) LOCAL_CERTIFICATE := PRESIGNED include $(BUILD_PREBUILT) ~~~ 工作算是完成了一半，接下来还需要修改frameworks下的java文件，让内置的三分apk可卸载等操作 [/frameworks/base/services/core/java/com/android/server/pm/PackageManagerService.java](http://192.168.180.196/gitweb/?p=c/rmt8735_6tb_s_l1.git;a=blob;f=frameworks/base/services/core/java/com/android/server/pm/PackageManagerService.java;h=6791cfba6b4e12cb7b2569b5186d2a12aa303687;hb=6791cfba6b4e12cb7b2569b5186d2a12aa303687) 添加： +            final File thirdpartyAppDir = new File(Environment.getRootDirectory(), "/vendor/thirdparty_apps"); +            scanDirLI(thirdpartyAppDir, PackageParser.PARSE_IS_SYSTEM +                    | PackageParser.PARSE_IS_SYSTEM_DIR, scanFlags, 0); 添加： +    private static boolean isThirdpartyApp(int parseFlags) { +               return (parseFlags & PackageParser.PARSE_IS_THIRDPARTY_APP) != 0; +       } public static int PackageParser.PARSE_IS_THIRDPARTY_APP = 1<<11; 修改： +        if (isSystemApp(pkg) && !isUpdatedSystemApp(pkg) && !isThirdpartyApp(parseFlags)) { 不知道在那行的，可以搜索关键字，ctrl+L 索引行 修改完之后编译工程，发现以下异常： ~~~ No rule to make target `vendor/rmt/ThirdpartyApps/WST_WAL_C.apk', needed by `out/target/product/rmt8382_tb_l/obj/APPS/WST_WAL_C_intermediates/package.apk'. Stop ~~~ 检查了下配置文件，发现客户提供的apk文件跟我们的mk冲突了，于是修改 WST_WAL_C.APK 为 WST_WAL_C.apk 重新编译工程，完美运行 最终效果，内置9个apk，7个可见，2个后台 

在这一版本的平板系统定制中，客户需要定制系统默认语言，默认英语，可选语种分别是 |语言代码| |国家/地区| |--|--| |bn_BD|孟加拉语（孟加拉）| |en_US|英文| |ar|阿拉伯文 | |hi-IN|印地语 | |ur-PK|乌都语 | |fr|法语 | |ru-RU|俄语| |fa|波斯语| |es|西班牙语 | |pt|葡萄牙语| 需要修改的地方 device\公司名字\项目名字\full_项目名字.mk 修改变量： PRODUCT_LOCALES := en_US es_ES zh_CN zh_TW ru_RU pt_BR fr_FR de_DE tr_TR it_IT in_ID ms_MY vi_VN ar_EG hi_IN th_TH bn_IN pt_PT ur_PK fa_IR nl_NL el_GR hu_HU tl_PH ro_RO cs_CZ iw_IL my_MM km_KH ko_KR pl_PL es_US bg_BG hr_HR lv_LV lt_LT sk_SK uk_UA de_AT da_DK fi_FI nb_NO sv_SE en_GB ja_JP 把此段覆盖上面的语言代码 en_US es_ES ru_RU pt_BR fr_FR hi_IN ur_PK bn_IN ar_EG fa_IR 不过除了这个还有一个地方也可以修改系统默认语言 就是buildinfo.sh的ro.product.locale.language变量，修改默认的为自己的国家语言代码即可 修改完之后保存，make 工程，烧录固件 最终效果：  设置默认的时区也可以在buildinfo.sh里面设置，需要修改的变量分别是： o.product.locale.region=国家 persist.sys.timezone=地区 **eg:** ro.product.locale.region=BD persist.sys.timezone=Asia/Dhaka

原文地址：[http://blog.csdn.net/ouyang_peng/article/details/49815865](http://blog.csdn.net/ouyang_peng/article/details/49815865) 今天有个用户对【设置】有个特殊的要求，即： 1、开机的时候默认显示【开发者选项】并打开【USB调试】开关    （【Developer options】-->【USB debugging】） 2、开机的时候默认打开【安全】-->【未知来源】的开关    (【Security】--->【Unknown sources】) 1、首先解决【设置】界面默认显示【开发者选项】的问题 查看源代码：packages/apps/Settings/src/com/android/settings/SettingsActivity.java 在updateTilesList(List<DashboardCategory> target)方法中，可以找到【开发者选项】相关的代码： ~~~ else if (id == R.id.development_settings) { Log.d(LOG_TAG, "=================oyp K="+showDev); if (!showDev || um.hasUserRestriction( UserManager.DISALLOW_DEBUGGING_FEATURES)) { removeTile = true; } } ~~~ 其中showDev变量定义在该方法最开始处 ~~~ final boolean showDev = mDevelopmentPreferences.getBoolean(                  DevelopmentSettings.PREF_SHOW,                  android.os.Build.TYPE.equals("eng"));   ~~~ 因此要想特定客户直接显示【开发者选项】，则将showDev的值改变即可，代码如下： ~~~ //added by ouyang 2015-11-10 set DevelopmentSettings.PREF_SHOW=true if model is J5 if (android.os.SystemProperties.isJ5Version()) { SharedPreferences.Editor editor=mDevelopmentPreferences.edit(); editor.putBoolean(DevelopmentSettings.PREF_SHOW, true); editor.commit(); Log.d(LOG_TAG, "=================oyp set DevelopmentSettings.PREF_SHOW=true if model is J5 "); } //added by ouyang 2015-11-10 end final boolean showDev = mDevelopmentPreferences.getBoolean( DevelopmentSettings.PREF_SHOW, android.os.Build.TYPE.equals("eng")); ~~~ 即在初始化showDev变量之前，将DevelopmentSettings.PREF_SHOW的值设置为true，那么showDev也会是true。这样【开发者选项】就会默认打开。那个判断是J5客户的方法在/frameworks/base/core/java/android/os/SystemProperties.java中定义 ~~~ public static boolean isJ5Version(){       return SystemProperties.get("ro.product.model").contains("J5");   }   ~~~  2、解决【开发者选项】-->【USB调试】开关  首先查看packages/apps/Settings/src/com/android/settings/DevelopmentSettings.java 在updateAllOptions()方法中，有关于【USB调试】的逻辑处理。 ~~~ /// M: CR ALPS00244115. Lock and unlock screen, the "USB debugging" is unchecked. boolean isChecked = (mAdbDialog != null && mAdbDialog.isShowing()) ? true : (Settings.Global.getInt(cr, Settings.Global.ADB_ENABLED, 0) != 0); updateSwitchPreference(mEnableAdb, isChecked); /// M: update usb preference again mExt.customUSBPreference(mEnableAdb); ~~~ ~~~ void updateSwitchPreference(SwitchPreference switchPreference, boolean value) {       switchPreference.setChecked(value);       mHaveDebugSettings |= value;   }   ~~~ 其中mEnableAdb即【USB调试】开关控件。一开始我直接强制的把isChecked变量设置为true，如下代码所示 ~~~ /// M: CR ALPS00244115. Lock and unlock screen, the "USB debugging" is unchecked. boolean isChecked = (mAdbDialog != null && mAdbDialog.isShowing()) ? true : (Settings.Global.getInt(cr, Settings.Global.ADB_ENABLED, 0) != 0); - //added by ouyang 2015-11-10 set mEnableAdb=true if model is J5 - if (android.os.SystemProperties.isJ5Version()) { - isChecked=true; - } - //added by ouyang 2015-11-10 end updateSwitchPreference(mEnableAdb, isChecked); /// M: update usb preference again mExt.customUSBPreference(mEnableAdb); ~~~ 但是这样的话，直接刷机后开机的话还是不能直接连接USB调试，还要重新关闭该开关再打开该开关才能进行USB调试，因此该方案被放弃。 因为是否真正打开【USB调试】功能，是看Settings.Global.ADB_ENABLED这个属性的值是0还是1。因此真正的方法是在一个接受开机广播的广播接收者中将Settings.Global.ADB_ENABLED设置为1。 在下面和【未知来源】一起修改，在第4步骤中解决。 3、解决【安全】-->【未知来源】的开关 默认打开的问题 首先查看packages/apps/Settings/src/com/android/settings/SecuritySettings.java文件，在createPreferenceHierarchy()方法中找到【未知来源】的控件，403行附近 ~~~ mToggleAppInstallation = (SwitchPreference) findPreference(                  KEY_TOGGLE_INSTALL_APPLICATIONS);    mToggleAppInstallation.setChecked(isNonMarketAppsAllowed());  ~~~ 其中isNonMarketAppsAllowed()方法代码如下 ~~~ private boolean isNonMarketAppsAllowed() {         return Settings.Global.getInt(getContentResolver(),                                       Settings.Global.INSTALL_NON_MARKET_APPS, 0) > 0;     }   ~~~ setNonMarketAppsAllowed(boolean enabled)方法代码如下 ~~~ private void setNonMarketAppsAllowed(boolean enabled) { final UserManager um = (UserManager) getActivity().getSystemService(Context.USER_SERVICE); if (um.hasUserRestriction(UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES)) { return; } // Change the system setting Settings.Global.putInt(getContentResolver(), Settings.Global.INSTALL_NON_MARKET_APPS, enabled ? 1 : 0); } ~~~ 一开始我在判断isNonMarketAppsAllowed()方法之前，先调用setNonMarketAppsAllowed()方法，这样一进入这个界面的话，【未知来源】选项是被勾选的。 ~~~ mToggleAppInstallation = (SwitchPreference) findPreference( KEY_TOGGLE_INSTALL_APPLICATIONS); - - //added by ouyang 2015-11-10 setChecked(true) if the model is J5 - if (android.os.SystemProperties.isJ5Version()) { - setNonMarketAppsAllowed(true); - } mToggleAppInstallation.setChecked(isNonMarketAppsAllowed()); - //added by ouyang 2015-11-10 end ~~~ 但是，刷完机直接安装一个第三方的apk的话，还是会弹出窗口要我设置【未知来源】选项，如下所示，因此该方案被放弃。  点击【设置】按钮进入到界面是，【未知来源】按钮默认勾选了，这个时候退出去，继续安装apk的话就可以安装了，如下所示：  因为这个添加的代码是在SecuritySettings的createPreferenceHierarchy()方法中，也就是说要进入到该Activity才生效。这样明显没达到目的。 因此要和设置【USB调试】一样，在一个接收开机广播的广播接收者中将Settings.Global.INSTALL_NON_MARKET_APPS设置为1。 4、找Settings里面定义的一个接收开机广播的广播接收者，在AndroidManifest.xml中找到一个，当然你也可以自己定义一个这样的广播接收者。 ~~~ <!-- Restore Rotation Receiver --> <receiver android:name="com.mediatek.settings.RestoreRotationReceiver"> <intent-filter> <action android:name="android.intent.action.BOOT_COMPLETED" /> <action android:name="android.intent.action.ACTION_BOOT_IPO" /> </intent-filter> </receiver> ~~~ 因此在packages/apps/Settings/src/com/mediatek/settings/RestoreRotationReceiver.java的onReceive(Context context, Intent intent)方法中加入以下代码： ~~~ //added by ouyang 2015-11-13 if (android.os.SystemProperties.isJ5Version()) { // 开机启动时，默认设置 [未知来源] 勾选 Settings.Global.putInt(context.getContentResolver(), Settings.Global.INSTALL_NON_MARKET_APPS,1); // 开机启动时，默认设置 [USB调试] 勾选 Settings.Global.putInt(context.getContentResolver(),Settings.Global.ADB_ENABLED, 1); } //added by ouyang 2015-11-13 end ~~~ 而一开始添加的代码可以注释掉了。通过git diff可以看出来 ~~~ diff --git a/packages/apps/Settings/src/com/android/settings/DevelopmentSettings.java b/packages/apps/Settings/src/com/android/settings/Devel index 0a987df..503270a 100755 --- a/packages/apps/Settings/src/com/android/settings/DevelopmentSettings.java +++ b/packages/apps/Settings/src/com/android/settings/DevelopmentSettings.java @@ -508,15 +508,9 @@ public class DevelopmentSettings extends SettingsPreferenceFragment final Context context = getActivity(); final ContentResolver cr = context.getContentResolver(); mHaveDebugSettings = false; - /// M: CR ALPS00244115. Lock and unlock screen, the "USB debugging" is unchecked. boolean isChecked = (mAdbDialog != null && mAdbDialog.isShowing()) ? true : (Settings.Global.getInt(cr, Settings.Global.ADB_ENABLED, 0) != 0); - //added by ouyang 2015-11-10 set mEnableAdb=true if model is J5 - if (android.os.SystemProperties.isJ5Version()) { - isChecked=true; - } - //added by ouyang 2015-11-10 end updateSwitchPreference(mEnableAdb, isChecked); /// M: update usb preference again mExt.customUSBPreference(mEnableAdb); ~~~ ~~~ diff --git a/packages/apps/Settings/src/com/android/settings/SecuritySettings.java b/packages/apps/Settings/src/com/android/settings/Security index 4de173a..392e6ee 100755 --- a/packages/apps/Settings/src/com/android/settings/SecuritySettings.java +++ b/packages/apps/Settings/src/com/android/settings/SecuritySettings.java @@ -402,14 +402,7 @@ public class SecuritySettings extends SettingsPreferenceFragment root.findPreference(KEY_DEVICE_ADMIN_CATEGORY); mToggleAppInstallation = (SwitchPreference) findPreference( KEY_TOGGLE_INSTALL_APPLICATIONS); - - //added by ouyang 2015-11-10 setChecked(true) if the model is J5 - if (android.os.SystemProperties.isJ5Version()) { - setNonMarketAppsAllowed(true); - } mToggleAppInstallation.setChecked(isNonMarketAppsAllowed()); - //added by ouyang 2015-11-10 end - // Side loading of apps. // Disable for restricted profiles. For others, check if policy disallows it. mToggleAppInstallation.setEnabled(!um.getUserInfo(UserHandle.myUserId()).isRestricted()); ~~~ 这样改为后，编译，刷机后，插上USB数据线就可以开始进行adb调试了，而且可以直接安装未知来源的apk了。

很多订单项目都需要我们去修改开机logo和开机动画，今天说的也是关于这方面的修改，首先我们要知道MTK的工作原理，查看开发板的文档可知，我们需要降编译和打包 之后的文件编译到 system/media 下，下面我就一个一个的来说，先从开机logo开始说吧，这个修改我们只需要替换相关的图片，然后替换下名字就OK了，因为是替换了资 源文件，所以我们不需要再次编译源码，snod 一下就OK了，命令：make snod 开机logo的替换： 替换地址：bootable\bootloader\lk\dev\logo 此地址下分别是多个分辨率的资源，所以我们要根据自己设备的分辨率来替换 查看自己的分辨率： 找到目录：device\公司名字\项目名字\ProjectConfig.mk 搜索关键字：BOOT_LOGO 即可以查看当前设备logo的分辨率 然后在对应去 bootable\bootloader\lk\dev\logo 下进行替换 EG：分辨率是 WSVGA  图片所选分别是替换之后的第一页logo和第二页logo 开机动画： 屏蔽 build/core/main.mk 文件宏函数 ~~~ #$(call assert-product-vars, __STASHED) ~~~ 在自定义或者已存在的目录下配置mk降文件并将动画等资源文件拷贝到此，编译到 system/media 下 EG：自定义编译目录 vendor/media/ 配置宏： ~~~ LOCAL_PATH := $(call my-dir) # ==== Engineer-Jsp bootanimation ======== include $(CLEAR_VARS) TARGET_PATH:= system/media PRODUCT_COPY_FILES += \ $(call add-to-product-copy-files-if-exists, $(LOCAL_PATH)/bootanimation.zip:$(TARGET_PATH)/bootanimation.zip) # ===== Engineer-Jsp bootaudio =========== PRODUCT_COPY_FILES += \ $(call add-to-product-copy-files-if-exists, $(LOCAL_PATH)/bootaudio.mp3:$(TARGET_PATH)/bootaudio.mp3) ~~~ 之后编译源码，再次卡机可看到效果 替换壁纸： EG：没有文档或者其他提示的情况下 直接使用 find 命令，不知道可以查看下述博客说明 博客地址：[http://blog.csdn.net/jspping/article/details/50467616](http://blog.csdn.net/jspping/article/details/50467616) 不同设备，不同版型对应的目录也大不相同，博主的目录是在： device\mediatek\common\overlay\tablet\frameworks\base\core\res\res\drawable-sw600dp-nodpi 效果图(替换之后的)：  另外，开机铃声也在开机动画那里，已经配置好了，可以直接使用mk文件，准备好mp3文件即可，之后编译相关模块源码，如果文件之前已经编译并且存在，请直接替换掉 编译目标地址下的资源文件，然后 make snod 一下，烧录固件即可，再次开机可以看到效果 **本篇博客到此结束，谢谢观博！**

在android职业生涯，做了将近2年的application，于是我尝试接触系统，以便更深的了解android，在接到一个平板系统定制订单，需要对相关的原生设备信息进行更改，今天 我们就一起来修改原生代码，客制化我们自己的系统吧 修改上述相关信息需查看源码 buildinfo.sh 它所在的位置是：build\tools\ 或者定位到源码根目录下：find out -name "buidnifo.*" 可以查看buildinfo前缀的所有文件所在目录 **EG:** ~~~ android5@ubuntu2015:/mnt/disk3/jsp/RMT8382$ find ../RMT8382 out -name "buildinfo.*" ../RMT8382/build/tools/buildinfo.sh ../RMT8382/external/chromium_org/tools/sheriffing/buildinfo.js ../RMT8382/external/chromium_org/tools/grit/grit/tool/buildinfo.py ../RMT8382/external/chromium_org/tools/grit/grit/testdata/buildinfo.grd ../RMT8382/external/chromium_org/chrome/browser/resources/chromeos/chromevox/common/buildinfo.js android5@ubuntu2015:/mnt/disk3/jsp/RMT8382$ ~~~ 找到该文件后，查看内容并且修改我们需要的部分 ~~~ ro.build.display.id=版本号 ro.product.model=型号 ro.product.brand=品牌 ro.product.name=名称 ro.product.device=设备 ro.product.board=Board ro.product.manufacturer=制造商 ~~~ 效果图：  其他信息就不显示了，因为这个改起来不难 需要订做系统，专机1K以上可以联系合作，以下是平板原生launcher主界面  已经替换了默认壁纸，5.0系统，谢谢观博！

> 原文出处：[Android系统之路-初识MTK](http://blog.csdn.net/column/details/androidmtk.html) 作者：[jspping](http://blog.csdn.net/jspping) **本系列文章经作者授权在看云整理发布，未经作者允许，请勿转载！** # Android系统之路-初识MTK > 关于MTK平台 Android系统开发的一些系统定制常用处理