BluetoothSettings.java BluetoothEnabler.java public void onCheckedChanged(CompoundButtonbuttonView, boolean isChecked)     ->mLocalAdapter.setBluetoothEnabled(isChecked);   LocalBluetoothAdapter.java public void setBluetoothEnabled(booleanenabled)          ->mAdapter.enable()   AdapterService.java public boolean enable()    ->service.enable()        ->booleanenable()     ->public synchronized boolean enable(booleanquietMode)      ->mAdapterStateMachine.obtainMessage(AdapterState.USER_TURN_ON);   AdapterState.java private AdapterState(AdapterService service,AdapterProperties adapterProperties)           ->private class OffState extends State        ->publicboolean processMessage(Message msg)     ->switch(msg.what)  case USER_TURN_ON:    ->adapterService.processStart();   AdapterService.java void processStart()   ->setProfileServiceState(supportedProfileServices,BluetoothAdapter.STATE_ON);   ->private void setProfileServiceState(Class[]services, int state)         AdapterState.java private class PendingCommandState extendsState      ->public boolean processMessage(Message msg)   ->switch(msg.what)  case STARTED:        ->boolean ret =adapterService.enableNative();   AdapterService.java /*package*/ native boolean enableNative();     com_android_bluetooth_btservice_AdapterService.cpp const bt_interface_t* getBluetoothInterface(){    return sBluetoothInterface; } staticconst bt_interface_t *sBluetoothInterface = NULL; static jboolean enableNative(JNIEnv* env,jobject obj)   ->      sBluetoothInterface->enable(); {"enableNative","()Z",  (void*) enableNative},   Bluetooth.h(hardware/libhardware/include/hardware/) bt_interface_t struct   Bluetooth.c const bt_interface_t*bluetooth__get_bluetooth_interface () {    return &bluetoothInterface; } static const bt_interface_t bluetoothInterface= {    sizeof(bluetoothInterface),    init,    enable,    disable,    cleanup,    get_adapter_properties,    get_adapter_property,    set_adapter_property,    get_remote_device_properties,    get_remote_device_property,    set_remote_device_property,    get_remote_service_record,    get_remote_services,    start_discovery,    cancel_discovery,    create_bond,    remove_bond,    cancel_bond,    pin_reply,    ssp_reply,    get_profile_interface,    dut_mode_configure,    dut_mode_send, #if BLE_INCLUDED == TRUE    le_test_mode, #else    NULL, #endif    config_hci_snoop_log }; static int enable( void )     ->btif_enable_bluetooth()   btif_api.h bt_status_t btif_enable_bluetooth(void);   btif_core.c bt_status_t btif_enable_bluetooth(void)         ->bte_main_enable()   bte_main.c void bte_main_enable()   ->bte_hci_enable()       ->staticvoid bte_hci_enable(void)       ->bt_hc_if->set_power(BT_HC_CHIP_PWR_ON) 备注：static bt_hc_interface_t*bt_hc_if=NULL;   bt_hci_lib.h bt_hc_interface_t struct   bt_hci_bdroid.c const bt_hc_interface_t*bt_hc_get_interface(void) {    return &bluetoothHCLibInterface; } static const bt_hc_interface_tbluetoothHCLibInterface = {    sizeof(bt_hc_interface_t),    init,    set_power,     lpm,    preload,    postload,    transmit_buf,    set_rxflow,    logging,    cleanup }; static void set_power(bt_hc_chip_power_state_tstate)       ->bt_vnd_if->op(BT_VND_OP_POWER_CTRL, &pwr_state); 备注：externbt_vendor_interface_t *bt_vnd_if;   Bt_vendor_lib.h bt_vendor_interface_t struct   Bt_vendor_brcm.c const bt_vendor_interface_tBLUETOOTH_VENDOR_LIB_INTERFACE = {    sizeof(bt_vendor_interface_t),    init,     op,    cleanup }; static int op(bt_vendor_opcode_t opcode, void*param)        ->case BT_VND_OP_POWER_CTRL:            ->upio_set_bluetooth_power(UPIO_BT_POWER_ON);   upio.h int upio_set_bluetooth_power(int on);   upio.c int upio_set_bluetooth_power(int on)    ->/sys/class/rfkill/rfkill%d/type