Android 9.0 蓝牙电话BluetoothHeadsetClient

BluetoothHeadsetClient
主要实现HFP协议，主要实现拨打、接听、挂断电话（AG侧、HF侧）、切换声道功能。

AG（Audio Gate）音频网关—音频设备输入输出网关。
HF（Hands Free）免提—该设备作为音频网关的远程音频输入/输出机制，并可提供若干遥控功能。
在车载蓝牙中，手机侧是AG，车载蓝牙侧是HF，在android源代码中，将AG侧称为HFP/AG，将HF侧称为HFPClient/HF。
BluetoothHeadsetClient初始化

/*** 连接服务*/
private void getProfileProxy() {mAdapter.getProfileProxy(mContext, new ProxyServiceListener(), BluetoothProfile.HEADSET_CLIENT);
}
private final class ProxyServiceListener implements BluetoothProfile.ServiceListener {@Overridepublic void onServiceConnected(int profile, BluetoothProfile proxy) {Log.d(TAG,"Bluetooth service connected profile == "+profile);if (profile == BluetoothProfile.HEADSET_CLIENT) {isHeadSetProfileReady = true;mHeadsetClient = (BluetoothHeadsetClient)proxy;} }@Overridepublic void onServiceDisconnected(int profile) {if (profile == BluetoothProfile.HEADSET_CLIENT) {isHeadSetProfileReady = false;mHeadsetClient = null;}}
}
BluetoothHeadsetClient连接设备
//获取连接状态
public int getConnectionState() {if (mHeadsetClient != null) {List<BluetoothDevice> deviceList = mHeadsetClient.getConnectedDevices();if (deviceList.isEmpty()) {return BluetoothProfile.STATE_DISCONNECTED;} else {return mHeadsetClient.getConnectionState(deviceList.remove(0));}}return BluetoothProfile.STATE_DISCONNECTED;
}
//连接远程设备
public boolean connect(BluetoothDevice device) {if (null != mHeadsetClient) {return mHeadsetClient.connect(device);}Log.i(TAG,"connect mHeadsetClient == "+mHeadsetClient);return false;
}
//断开连接
public boolean disconnect(BluetoothDevice device) {if (null != mHeadsetClient) {return mHeadsetClient.disconnect(device);}Log.i(TAG, "disconnect mHeadsetClient == "+mHeadsetClient);return false;
}

BluetoothHeadsetClient控制声音通道

// Initiates a connection of audio channel.
public boolean connectAudio() {Log.d(TAG, "hangup clicked isHeadsetReady:" + isHeadSetProfileReady + ", mHeadset:" + mHeadsetClient);if (isHeadSetProfileReady && mHeadsetClient != null) {List<BluetoothDevice> deviceList = mHeadsetClient.getConnectedDevices();if (deviceList.isEmpty()) {return false;} else {setSpeakerPhoneOn(true);BluetoothDevice mDevice = deviceList.remove(0);return mHeadsetClient.connectAudio(mDevice);}} return false;
}
// Disconnects audio channel.
public boolean disconnectAudio() {Log.d(TAG, "hangup clicked isHeadsetReady:" + isHeadSetProfileReady + ", mHeadset:" + mHeadsetClient);if (isHeadSetProfileReady && mHeadsetClient != null) {List<BluetoothDevice> deviceList = mHeadsetClient.getConnectedDevices();if (deviceList.isEmpty()) {return false;} else {setSpeakerPhoneOn(false);BluetoothDevice mDevice = deviceList.remove(0);return mHeadsetClient.disconnectAudio(mDevice);}} return false;
}

BluetoothHeadsetClient电话

// 拨号
public void dial(String number) {Log.d(TAG, "dial clicked mIsProfileReady:" + isHeadSetProfileReady + ", mHeadsetClient:" + mHeadsetClient);if (!mAdapter.isEnabled() || mHeadsetClient == null) {ToastUtil.showToast(mContext, mContext.getResources().getString(R.string.bt_disable));return;}if (isHeadSetProfileReady && mHeadsetClient != null) {List<BluetoothDevice> deviceList = mHeadsetClient.getConnectedDevices();if (deviceList.isEmpty()) {ToastUtil.showToast(mContext, mContext.getResources().getString(R.string.text_tips_disconnected));}else {BluetoothDevice mDevice = deviceList.remove(0);setSpeakerPhoneOn(true);mHeadsetClient.dial(mDevice, number);}}
}
// 挂断所有电话
public void terminateCall(int callNumber) {Log.d(TAG, "terminate clicked isHeadsetReady:" + isHeadSetProfileReady + ", mHeadset:" + mHeadsetClient);if (isHeadSetProfileReady && mHeadsetClient != null) {List<BluetoothDevice> deviceList = mHeadsetClient.getConnectedDevices();if (deviceList.isEmpty()) {ToastUtil.showToast(mContext, mContext.getResources().getString(R.string.text_tips_disconnected));} else {setSpeakerPhoneOn(false);BluetoothDevice mDevice = deviceList.remove(0);List<BluetoothHeadsetClientCall> calls = mHeadsetClient.getCurrentCalls(mDevice);if (!calls.isEmpty()) {BluetoothHeadsetClientCall call = calls.remove(callNumber);mHeadsetClient.terminateCall(mDevice,call);}}}}
//接听来电
public void acceptCall(int flag) {Log.d(TAG, "hangup clicked isHeadsetReady:" + isHeadSetProfileReady + ", mHeadset:" + mHeadsetClient);if (isHeadSetProfileReady && mHeadsetClient != null) {List<BluetoothDevice> deviceList = mHeadsetClient.getConnectedDevices();if (deviceList.isEmpty()) {ToastUtil.showToast(mContext, mContext.getResources().getString(R.string.text_tips_disconnected));} else {setSpeakerPhoneOn(true);BluetoothDevice mDevice = deviceList.remove(0);mHeadsetClient.acceptCall(mDevice,flag);}}
}
//挂断来电
public void hangup() {Log.d(TAG, "hangup clicked isHeadsetReady:" + isHeadSetProfileReady + ", mHeadset:" + mHeadsetClient);if (isHeadSetProfileReady && mHeadsetClient != null) {List<BluetoothDevice> deviceList = mHeadsetClient.getConnectedDevices();if (deviceList.isEmpty()) {ToastUtil.showToast(mContext, mContext.getResources().getString(R.string.text_tips_disconnected));} else {setSpeakerPhoneOn(false);BluetoothDevice mDevice = deviceList.remove(0);mHeadsetClient.rejectCall(mDevice);}}
}
//发送DTMF
public void sendDTMF(byte code) {if (!mAdapter.isEnabled() || mHeadsetClient == null) {ToastUtil.showToast(mContext, mContext.getResources().getString(R.string.bt_disable));return;}Log.d(TAG, "sendDTMF() Enter. with" + code);List<BluetoothDevice> deviceList = mHeadsetClient.getConnectedDevices();if (deviceList.isEmpty()) {ToastUtil.showToast(mContext, mContext.getResources().getString(R.string.text_tips_disconnected));} else {BluetoothDevice mDevice = deviceList.remove(0);Log.d(TAG, "mConnStat is " + mConnStat);if (mConnStat == BluetoothHeadsetClientCall.CALL_STATE_ACTIVE) {mHeadsetClient.sendDTMF(mDevice, code);} else {Log.d(TAG, "mConnStat is not CALL_STATE_ACTIVE");}}
}
//三方ANSWER_AND_HOLD
bluetoothHeadsetClient.acceptCall(BluetoothDevice,BluetoothHeadsetClient.CALL_ACCEPT_HOLD);
//三方ANSWER_AND_TERMINATE
bluetoothHeadsetClient.acceptCall(BluetoothDevice,BluetoothHeadsetClient.CALL_ACCEPT_TERMINATE);
//获取信号强度
Bundle bundle = bluetoothHeadsetClient.getCurrentAgEvents(BluetoothDevice);
if (bundle != null && bundle.containsKey(BluetoothHeadsetClient.EXTRA_NETWORK_SIGNAL_STRENGTH))
{return bundle.getInt(BluetoothHeadsetClient.EXTRA_NETWORK_SIGNAL_STRENGTH);
}

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