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我在Nexus 5上使用6.0.1測試了我的Camera2實施。這個問題似乎與切換閃光模式有關。相當不可預測，改變閃光燈，並採取在AF的圖片效果不是鎖定和以下日誌中出現：Android Camera2放棄自動對焦鎖定
01-13 11:02:53.184 214 7175 I mm-camera: af_exhaustive_search: AEC not settled. Returning!
01-13 11:02:53.217 214 7175 I mm-camera: af_exhaustive_search: AEC not settled. Returning!
01-13 11:02:53.251 214 7175 I mm-camera: af_exhaustive_search: AEC not settled. Returning!
01-13 11:02:53.284 214 7175 I mm-camera: af_exhaustive_search: AEC not settled. Returning!
01-13 11:02:53.318 214 7175 I mm-camera: af_exhaustive_search: AEC not settled. Returning!
01-13 11:02:53.351 214 7175 I mm-camera: af_exhaustive_search: AEC not settled. Returning!
01-13 11:02:53.385 214 7175 I mm-camera: af_exhaustive_search: AEC not settled. Returning!
01-13 11:02:53.419 214 7175 I mm-camera: af_exhaustive_search: AEC not settled. Returning!
01-13 11:02:53.452 214 7175 I mm-camera: af_exhaustive_search: AEC not settled. Returning!
01-13 11:02:53.485 214 7175 I mm-camera: af_exhaustive_search: AEC not settled. Returning!
01-13 11:02:53.519 214 7175 I mm-camera: af_exhaustive_search: AEC not settled. Returning!
01-13 11:02:53.552 214 7175 I mm-camera: af_exhaustive_search: AEC not settled. Returning!
01-13 11:02:53.586 214 7175 I mm-camera: af_exhaustive_search: AEC not settled. Returning!
01-13 11:02:53.619 214 7175 I mm-camera: af_exhaustive_search: AEC not settled. Returning!
01-13 11:02:53.653 214 7175 I mm-camera: af_exhaustive_search: AEC not settled. Returning!
01-13 11:02:54.031 214 7174 I mm-camera-sensor: port_sensor_process_aec_est:686 AEC EST DONE
01-13 11:02:54.031 214 7174 I mm-camera-sensor: port_sensor_process_aec_est:686 AEC EST DONE
01-13 11:02:54.031 214 7174 I mm-camera-sensor: port_sensor_process_aec_est:688 regular_led_trigger 1
01-13 11:02:54.648 804 1488 D NetlinkSocketObserver: NeighborEvent{elapsedMs=947757, 10.12.0.254, [000D483417C9], RTM_NEWNEIGH, NUD_PROBE}
01-13 11:02:56.000 197 791 D audio_hw_primary: disable_audio_route: reset and update mixer path: low-latency-playback
01-13 11:02:56.001 197 791 D audio_hw_primary: disable_snd_device: snd_device(2: speaker)
01-13 11:02:57.048 214 7192 E mm-camera-sensor: port_sensor_handle_upstream_module_event:1444 Reset previously set LED state!
01-13 11:02:57.048 214 7192 I AEC_PORT: aec_port_proc_downstream_event: Received LED state timeout. Reset LED state!
01-13 11:02:59.918 214 7175 E mm-camera: af_process_parse_stats: Invalid FV data!
01-13 11:02:59.918 214 7175 E mm-camera: af_process: Error processing AF stats!
01-13 11:02:59.952 214 7175 E mm-camera: af_process_parse_stats: Invalid FV data!
01-13 11:02:59.952 214 7175 E mm-camera: af_process: Error processing AF stats!
如果我繼續拍照，而無需切換閃光燈模式，它工作正常（即使閃光燈總是）。只有當我切換閃光燈模式時，纔會發生這種情況，並且哪種模式處於活動狀態似乎並不重要（因此從閃光燈開啓到閃光燈自動或閃光燈自動閃光燈關閉均可導致此錯誤）。
這是我改變閃光模式代碼：
private void setFlashMode(String mode) {
if (mode.equals(CAMERA_FLASH_OFF)) {
mPreviewRequestBuilder
.set(CaptureRequest.CONTROL_AE_MODE, CameraMetadata.CONTROL_AE_MODE_ON);
mPreviewRequestBuilder.set(CaptureRequest.FLASH_MODE, CameraMetadata.FLASH_MODE_OFF);
}
else if(mode.equals(CAMERA_FLASH_AUTO)) {
mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CameraMetadata.CONTROL_AE_MODE_ON_AUTO_FLASH);
mPreviewRequestBuilder.set(CaptureRequest.FLASH_MODE, CameraMetadata.FLASH_MODE_OFF);
}
else if(mode.equals(CAMERA_FLASH_ON)) {
mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CameraMetadata.CONTROL_AE_MODE_ON_ALWAYS_FLASH);
mPreviewRequestBuilder.set(CaptureRequest.FLASH_MODE, CameraMetadata.FLASH_MODE_OFF);
}
else if(mode.equals(CAMERA_FLASH_TORCH)) {
mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CameraMetadata.CONTROL_AE_MODE_ON);
mPreviewRequestBuilder.set(CaptureRequest.FLASH_MODE, CameraMetadata.FLASH_MODE_TORCH);
}
try {
mCaptureSession.setRepeatingRequest(mPreviewRequestBuilder.build(), null,
mBackgroundHandler);
if (getOnCameraParametersSetListener() != null) {
getOnCameraParametersSetListener().onCameraParametersSet();
}
} catch (CameraAccessException e) {
Log.e(TAG,
".setFlashMode() - Exception caught while setting the capture session request",
e);
}
}
任何幫助，非常感謝。