BT 常用调试命令（注：大部分指令需要root权限才行）

jimbo_lee

已于 2025-03-31 15:19:25 修改

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文章标签： android bt bluetooth

于 2025-03-31 13:42:44 首次发布

本文链接：https://blog.youkuaiyun.com/jimbo_lee/article/details/146815417

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记录一下个人本地蓝牙调试指令，留点足迹以备后面查询

打开和关闭蓝牙BT

打开bt
1、adb shell svc bluetooth enable

2、echo 1>/sys/class/rfkill/rfkill0/state

3、svc bluetooth enable

关闭bt

adb shell svc bluetooth disable

echo 0>/sys/class/rfkill/rfkill0/state

svc bluetooth disable

获取蓝牙状态：

   1、adb shell settings get global bluetooth_on                 1\0
   2、cat /sys/class/rfkill/rfkill0/state 1\0
   3、adb shell dumpsys bluetooth_manager (dumpsys -l )
       demo:
       Bluetooth Status
       enabled: true
       state: ON
       address: 22:22:CE:61:D6:21
       name: BTdevice-0104
       time since enabled: 01:16:24.119

setScanMode(AbstractionLayer.BT_SCAN_MODE_CONNECTABLE);/*可连接*/
setScanMode(AbstractionLayer.BT_SCAN_MODE_CONNECTABLE_DISCOVERABLE); /*可连接和可被发现*/

adb 指令设置蓝牙mode

允许蓝牙被发现：
adb shell am start -a android.bluetooth.adapter.action.REQUEST_DISCOVERABLE

蓝牙地址获取：

adb shell settings get secure bluetooth_address

蓝牙名称获取：

adb shell settings get secure bluetooth_name

获取已配对的设备：

if (mBluetoothAdapter == null) {
	mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
}

mBluetoothAdapter.getBondedDevices();

获取已连接设备：

packages/apps/Bluetooth/src/com/android/bluetooth/pan/PanService.java

    public List<BluetoothDevice> getConnectedDevices() {
        enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
        List<BluetoothDevice> devices =
                getDevicesMatchingConnectionStates(new int[]{BluetoothProfile.STATE_CONNECTED});
        return devices;
    }

    List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states) {
        enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
        List<BluetoothDevice> panDevices = new ArrayList<BluetoothDevice>();

        for (BluetoothDevice device : mPanDevices.keySet()) {
            int panDeviceState = getConnectionState(device);
            for (int state : states) {
                if (state == panDeviceState) {
                    panDevices.add(device);
                    break;
                }
            }
        }
        return panDevices;
    }

蓝牙配置保存为位置

/data/misc/bluedroid

dumpsys 蓝牙信息：

adb shell dumpsys bluetooth_manager

蓝牙耳机状态切换：

AudioManager 提供的下列方法可以用来查询当前Audio输出的状态：
   isBluetoothA2dpOn()：检查A2DPAudio音频输出是否通过蓝牙耳机；
   isSpeakerphoneOn()：检查扬声器是否打开；
   isWiredHeadsetOn()：检查线控耳机是否连着；注意这个方法只是用来判断耳机是否是插入状态，并不能用它的结果来判定当前的Audio是通过耳机输出的，这还依赖于其他条件
   setSpeakerphoneOn(boolean on)：直接选择外放扬声器发声；
   setBluetoothScoOn(boolean on)：要求使用蓝牙SCO耳机进行通讯；
       A2DP：是一种单向的高品质音频数据传输链路，通常用于播放立体声音乐；
       SCO：则是一种双向的音频数据的传输链路，该链路只支持8K及16K单声道的音频数据，只能用于普通语音的传输，若用于播放音乐那就只能呵呵了。
       两者的主要区别是：A2DP只能播放，默认是打开的，而SCO既能录音也能播放，默认是关闭的。如果要录音肯定要打开sco啦，因此调用上面的setBluetoothScoOn(boolean on)就可以通过蓝牙耳机录音、播放音频了，录完、播放完记得要关闭。

AudioManager.setMode()方法来管理播放模式。在setMode()方法中有以下几种对应不同的播放模式:
   MODE_NORMAL : 普通模式，既不是铃声模式也不是通话模式
   MODE_RINGTONE : 铃声模式
   MODE_IN_CALL : 通话模式
   MODE_IN_COMMUNICATION : 通信模式，包括音/视频,VoIP通话.(3.0加入的，与通话模式类似)
   /**
   * 切换到外放
   */
   public void changeToSpeaker(){
       //注意此处，蓝牙未断开时使用MODE_IN_COMMUNICATION而不是MODE_NORMAL
       mAudioManager.setMode(bluetoothIsConnected ? AudioManager.MODE_IN_COMMUNICATION : AudioManager.MODE_NORMAL);
       mAudioManager.stopBluetoothSco();
       mAudioManager.setBluetoothScoOn(false);
       mAudioManager.setSpeakerphoneOn(true);
   }
   /**
   * 切换到蓝牙
   */
   public void changeToHeadset(){
       mAudioManager.setMode(AudioManager.MODE_IN_COMMUNICATION);
       mAudioManager.startBluetoothSco();
       mAudioManager.setBluetoothScoOn(true);
       mAudioManager.setSpeakerphoneOn(false);
   }

   /**
   * 切换到耳机模式
   */
   public void changeToHeadset(){
       mAudioManager.setMode(AudioManager.MODE_IN_COMMUNICATION);
       mAudioManager.stopBluetoothSco();
       mAudioManager.setBluetoothScoOn(false);
       mAudioManager.setSpeakerphoneOn(false);
   }

   /**
   * 切换到听筒
   */
   public void changeToReceiver(){
       audioManager.setSpeakerphoneOn(false);
       if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB){
           audioManager.setMode(AudioManager.MODE_IN_COMMUNICATION);
       } else {
           audioManager.setMode(AudioManager.MODE_IN_CALL);
       }
   }

蓝牙音频切换 key log：

02-21 05:17:19.079 825 825 I Telecom : WiredHeadsetManager: ACTION_HEADSET_PLUG event, plugged in: true, : WHC.oADA@AEg
02-21 05:17:19.127 509 559 D audio_hw_primary: adev_set_parameters: enter: BT_SCO=off
02-21 05:17:19.147 825 2812 I Telecom : CallAudioRouteStateMachine: Message received: SWITCH_HEADSET=1003, arg1=0: WHC.oADA->CARSM.pM_CONNECT_WIRED_HEADSET->CARSM.pM_SWITCH_HEADSET@AEg
02-21 05:17:19.148 825 2812 I Telecom : QuiescentEarpieceRoute: Processing message SWITCH_HEADSET: WHC.oADA->CARSM.pM_CONNECT_WIRED_HEADSET->CARSM.pM_SWITCH_HEADSET@AEg
02-21 05:17:19.151 825 2812 I Telecom : Logging.Events: Non-call EVENT: AUDIO_ROUTE, Entering state QuiescentHeadsetRoute: WHC.oADA->CARSM.pM_CONNECT_WIRED_HEADSET->CARSM.pM_SWITCH_HEADSET@AEg
02-21 05:17:19.292 509 3249 I msm8916_platform: xxx-audio: check devices: { headphones } -> { headphones-pmln8191 }
02-21 05:17:19.292 509 3249 D audio_hw_primary: select_devices: out_snd_device(10: headphones-pmln8191) in_snd_device(0: )

heaset->speaker-> bt
02-21 05:20:53.339 2338 2338 V MediaRouter: Audio routes updated: AudioRoutesInfo{ type=HEADSET }, a2dp=false
02-21 05:20:53.380 2338 2338 V MediaRouter: Audio routes updated: AudioRoutesInfo{ type=SPEAKER }, a2dp=false

02-21 05:20:53.577 825 825 I Telecom : WiredHeadsetManager: ACTION_HEADSET_PLUG event, plugged in: false, : WHC.oADR@AJo
02-21 05:20:53.577 825 2812 I Telecom : QuiescentHeadsetRoute: Processing message DISCONNECT_WIRED_HEADSET: WHC.oADR->CARSM.pM_DISCONNECT_WIRED_HEADSET@AJo
02-21 05:20:53.577 6786 6922 D HeadsetStateMachine: moveTempStackToStateStack: X mStateStackTop=0,startingIndex=0,Top=Connected
02-21 05:20:53.577 825 2812 I Telecom : Logging.Events: Non-call EVENT: AUDIO_ROUTE, Wired headset disconnected: WHC.oADR->CARSM.pM_DISCONNECT_WIRED_HEADSET@AJo
02-21 05:20:53.578 6786 6922 D HeadsetStateMachine: Connected: currentDevice=4C:CC:34:AC:B1:8B, msg=audio state changed: 4C:CC:34:AC:B1:8B: AudioDisconnecting -> Connected
02-21 05:20:53.578 6786 6922 D HeadsetStateMachine: Connected: currentDevice=4C:CC:34:AC:B1:8B, msg=broadcastAudioState: 4C:CC:34:AC:B1:8B: 12->10
02-21 05:20:53.578 6786 6922 W HeadsetService: onAudioStateChangedFromStateMachine: 12->10
02-21 05:20:53.593 6786 6922 D HeadsetA2dpSync: releaseA2DP mA2dpSuspendTriggered 0 by device 4C:CC:34:AC:B1:8B
02-21 05:20:53.596 2868 2868 I [DEBUG][com.xxx.yyy.launcher][yyyAudioManager]: onReceive: ACTION_AUDIO_STATE_CHANGED. audioState: 10
02-21 05:20:53.597 2868 2868 I [DEBUG][com.xxx.yyy.launcher][VolumeKeyHelper]: onReceive: ACTION_AUDIO_STATE_CHANGED. BTState: 10
...
02-21 05:20:53.814 509 509 D hardware_info: hw_info_append_hw_type : device_name = speaker
02-21 05:20:53.814 509 509 D audio_hw_primary: disable_snd_device: snd_device(2: speaker)
02-21 05:20:53.828 825 2235 W system_server: Long monitor contention with owner Binder:825_5 (2471) at void com.android.server.audio.AudioDeviceBroker.setBluetoothScoOn(boolean, java.lang.String)(AudioDeviceBroker.java:352) waiters=1 in boolean com.android.server.audio.AudioDeviceBroker.isAvrcpAbsoluteVolumeSupported() for 236ms
02-21 05:20:53.832 2868 8386 I [DEBUG][com.xxx.yyy.launcher][yyyAudioManager]: ACTION_HEADSET_PLUG switchAudioPath2
02-21 05:20:53.832 2868 8386 I [DEBUG][com.xxx.yyy.launcher][yyyAudioManager]: switchAudioPath: To BT