今天拿到一個客戶新的訂單需求，大概有40多個需求，今天先講更改系統的藍牙/wifi 熱點/消息通知/sleep 添加 never選項，分別是： 藍牙：連接顯示名、系統界面顯示名字，重命名前的默認名字 wifi 熱點：連接名字，重命名前默認 Network name Notification popup ：系統?Notification popup 默認不勾選 休眠添加never選項，默認30s：添加永不休眠，默認30s 首先我們要知道系統默認的藍牙名字 ANDROID BT Linux input ...> find 你的源碼根目錄/ -type f|xargs grep "ANDROID BT" -l 這句命令是找出源碼下所有帶有字符串 ANDROID BT 所在的文件，搜索無果，直接進入源碼 packages\apps\Settings\src\com\android\settings\bluetooth\BluetoothSettins.java 跟蹤源碼找到如下代碼 ~~~ @Override public void onResume() { ...... if (mLocalAdapter != null) { updateContent(mLocalAdapter.getBluetoothState()); } } ~~~ 跟蹤updateContent函數，修改如下代碼 ~~~ 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 函數是我在frameworks/base/core/java/android/os/SystemProperties.java中定義的 ~~~ public static boolean isWalPadVersion(){ return SystemProperties.get("ro.product.model").contains("Walpad"); } ~~~ 根據編譯文件設置的客戶平板型號定制產品而定，這樣寫有人可能會覺得多此一舉，顯的麻煩，但是作為一個系統，能把它做成兼容模式豈不是更好？ 因為下次再有系統定制訂單需求，我們只需要修改配置文件和分支就夠了，輕松方便，而不需要再去new 代碼了 setSummary(...,...)函數就是藍牙設置打開藍牙之后在界面顯示的效果 R.string.bluetooth.is.visible_message 內容： ~~~ <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 即為我們替換的名字，即Walpad C,效果圖：  接下來修改重名命選項的藍牙設備名稱，onOptionsItemSelected(MenuItem item) 根據 item 追蹤重命名的 Dialog 找到如下邏輯： ~~~ @Override public Dialog onCreateDialog(Bundle savedInstanceState) { ...... mAlertDialog = new AlertDialog.Builder(getActivity()) .setTitle(R.string.bluetooth_rename_device) .setView(createDialogView(deviceName))// 繼續追蹤createDialogView(deviceName)方法 ...... return mAlertDialog; } ~~~ 根據邏輯，修改如下： ~~~ private View createDialogView(String deviceName) { ...... // Engineer-Jsp add default bluetooth name if (android.os.SystemProperties.isWalPadVersion()) {// 根據model顯示名稱 mDeviceNameView.setText("Walpad C"); }else{ mDeviceNameView.setText(deviceName); // set initial value before adding listener } ...... return view; } ~~~ 效果圖：  連接顯示名修改： ~~~ // 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");//在之前講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，根據信息搜索到源碼packages\apps\Settings\src\com\android\settings\wifi\WifiApDialog.java 根據邏輯，查找到如下代碼： ~~~ @Override protected void onCreate(Bundle savedInstanceState) { Context context = getContext(); ...... if (mWifiConfig != null) { // Engineer-Jsp add default bluetooth name if (android.os.SystemProperties.isWalPadVersion()) { //根據型號顯示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：  連接名字：  修改系統?Notification popup 默認不勾選 搜索關鍵字：源碼目錄...>find ./ -name ".xml" | xargs grep "Popup notification" 找到xml文件之后找到對應string name 名稱，發現他被一個布局文件調用，packages\apps\Mms\res\xml\notificationpreferences.xml - pref_summary_popup_notification -? defaultValue="false" 把這個默認false，即可 效果：  修改休眠選項默認 30s 添加永不休眠選項： 默認休眠30s修改：frameworks\base\packages\SettingsProvider\res\values\defaults.xml ~~~ <integer name="def_screen_off_timeout">30000</integer> ~~~ 添加永不休眠選項： ~~~ 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：