如何访问Android心率传感器RAW DATA？(反射光,而不是心跳)

Question

心率传感器上的android sdk只返回我没兴趣的计算bpm.

我需要访问android心率传感器RAW数据,例如在反射值的强度方面会很棒.(因为基本上心率传感器使用led并随时间测量反射率)

如果可能,访问由任何图像传感器收集的原始图像将更大.谢谢.

相关问题: 从Android Wear心率传感器读取基础颜色/光数据？

Answer 1

如果Google Fit是一个选项,您可以使用Google Fit的传感器API获取原始心跳数据.有关详情,请参阅Google健身指南.

private void trackHeartRate() {
    SensorsApi.findDataSources(mClient, new DataSourcesRequest.Builder()
            .setDataTypes(DataType.TYPE_HEART_RATE_BPM)
            // Can specify whether data type is raw or derived.
            .setDataSourceTypes(DataSource.TYPE_RAW)
            .build())
            .setResultCallback(new ResultCallback<DataSourcesResult>() {
                @Override
                public void onResult(DataSourcesResult dataSourcesResult) {
                    Log.i(TAG, "Result: " + dataSourcesResult.getStatus().toString());
                    for (DataSource dataSource : dataSourcesResult.getDataSources()) {
                        Log.i(TAG, "Data source found: " + dataSource.toString());
                        Log.i(TAG, "Data Source type: " + dataSource.getDataType().getName());

                        if (dataSource.getDataType().equals(DataType.TYPE_HEART_RATE_BPM)
                                && mListener == null) {
                            Log.i(TAG, "Data source for heart rate found!  Registering.");
                            registerFitnessDataListener(dataSource,
                                    DataType.TYPE_HEART_RATE_BPM);
                        }
                    }
                }
            });
    mListener = new OnDataPointListener() {
        @Override
        public void onDataPoint(DataPoint dataPoint) {
            for (Field field : dataPoint.getDataType().getFields()) {
                Value val = dataPoint.getValue(field);
                Log.i(TAG, "Detected DataPoint field: " + field.getName());
                Log.i(TAG, "Detected DataPoint value: " + val);
            }
        }
    };
}

private void registerFitnessDataListener(DataSource dataSource, DataType dataType) {
    Fitness.SensorsApi.add(
            mClient,
            new SensorRequest.Builder()
                    .setDataSource(dataSource) // Optional but recommended for custom data sets.
                    .setDataType(dataType) // Can't be omitted.
                    .setSamplingRate(10, TimeUnit.SECONDS)
                    .build(),
            mListener)
            .setResultCallback(new ResultCallback<Status>() {
                @Override
                public void onResult(Status status) {
                    if (status.isSuccess()) {
                        Log.i(TAG, "Listener registered!");
                    } else {
                        Log.i(TAG, "Listener not registered.");
                    }
                }
            });
}

希望这可以帮助.