无线电概述

The Qt Multimedia API provides a number of radio related classes for control over the radio tuner of the system, and gives access to Radio Data System (RDS) information for radio stations that broadcasts it.

无线电特征

The Radio API consists of two separate components. The radio tuner, QRadioTuner Radio QML type, which handles control of the radio hardware as well as tuning. The other is the radio data component, either QRadioData RadioData QML type, which gives access to RDS information.

无线电实现细节

The actual level of support depends on the underlying system support. It should be noted that only analog radio is supported, and the properties of the radio data component will only be populated if the system radio tuner supports RDS.

范例

There are two examples showing the usage of the Radio API. One shows how to use the QRadioTuner class from C++. The other shows how to implement a similar application using QML and Radio .

无线电范例

This image shows the example using the QRadioTuner API.

The example reads the frequency from the radio tuner, and sets the "Got Signal" text based on the signal strength. The buttons allow the user to tune and scan up and down the frequency band, while the slider to the side allows volume adjustments.

Only the FM frequency band is used in this example.

Declarative Radio Example

This example has the same functionality of the regular radio example mentioned above, but it includes a nice horizontal dial showing the position of the current frequency inside the band.

参考文档编制

C++ 类

QRadioData

Interfaces to the RDS functionality of the system radio

QRadioTuner

Interface to the systems analog radio device

QML 类型

Radio

Access radio functionality from a QML application

RadioData

Access RDS data from a QML application