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蓝牙开启流程

2016-12-20 10:41:51   0  举报

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蓝牙开启流程如下：首先，打开设备的设置菜单。然后，找到并点击“蓝牙”选项。在蓝牙设置页面，确保蓝牙开关处于关闭状态。接着，点击开关以启用蓝牙功能。设备将开始搜索附近的蓝牙设备。一旦找到要连接的蓝牙设备，点击该设备名称进行配对。可能需要输入一个配对码，这通常可以在设备的用户手册中找到。成功配对后，设备之间将建立蓝牙连接。现在，您可以通过蓝牙传输文件、音频、视频等内容，或者使用蓝牙耳机、键盘等外设与设备进行交互。

作者其他创作

大纲/内容

setDeviceConnectionState

onAudioPortListUpdate

AudioManager

setParameters(AUDIO_PARAMETER_DEVICE_CONNECT)

checkOutputForAllStrategies

setParameters(\"A2dpSuspended=false\")

openOutputStream

findSuitableHwDev_l

openOutput

broadcastConnectionState

setForceUseInt_SyncDevices

到/vendor/lib64/hw和/system/lib64/hw目录下找lib库

updateDevicesAndOutputs

adev-device.common.tag = HARDWARE_DEVICE_TAG; adev-device.common.version = AUDIO_DEVICE_API_VERSION_2_0; adev-device.common.module = (struct hw_module_t *) module; adev-device.common.close = adev_close; adev-device.init_check = adev_init_check; adev-device.set_voice_volume = adev_set_voice_volume; adev-device.set_master_volume = adev_set_master_volume; adev-device.set_mode = adev_set_mode; adev-device.set_mic_mute = adev_set_mic_mute; adev-device.get_mic_mute = adev_get_mic_mute; adev-device.set_parameters = adev_set_parameters; adev-device.get_parameters = adev_get_parameters; adev-device.get_input_buffer_size = adev_get_input_buffer_size; adev-device.open_output_stream = adev_open_output_stream; adev-device.close_output_stream = adev_close_output_stream; adev-device.open_input_stream = adev_open_input_stream; adev-device.close_input_stream = adev_close_input_stream; adev-device.dump = adev_dump; adev-output = NULL;

MixerThread

AudioFlinger

HwModule

AudioHwDevice

attach

DeviceDescriptor

checkA2dpSuspend

setBluetoothA2dpDeviceConnectionState

AudioStreamOut

open=adev_open

audio.h

openOutput_l

getModuleForDevice

AudioService

checkOutputsForDevice

out-stream.common.get_sample_rate = out_get_sample_rate; out-stream.common.set_sample_rate = out_set_sample_rate; out-stream.common.get_buffer_size = out_get_buffer_size; out-stream.common.get_channels = out_get_channels; out-stream.common.get_format = out_get_format; out-stream.common.set_format = out_set_format; out-stream.common.standby = out_standby; out-stream.common.dump = out_dump; out-stream.common.set_parameters = out_set_parameters; out-stream.common.get_parameters = out_get_parameters; out-stream.common.add_audio_effect = out_add_audio_effect; out-stream.common.remove_audio_effect = out_remove_audio_effect; out-stream.get_latency = out_get_latency; out-stream.set_volume = out_set_volume; out-stream.write = out_write; out-stream.get_render_position = out_get_render_position; out-stream.get_presentation_position = out_get_presentation_position;

audio_a2dp_hw.c

audio_hw_device_open

MSG_SET_A2DP_SINK_CONNECTION_STATE

hardware.c

onSetA2dpSinkConnectionState

load_audio_interface

AudioPolicyManager

setBluetoothA2dpOnInt

processMessage

loadHwModule_l

setDeviceConnectionStateInt

setForceUse