harmony 鸿蒙Obtaining Current Cellular Network Signal Information
Obtaining Current Cellular Network Signal Information
Use Cases
Applications always need to obtain signal information of the registered cellular network to obtain the network quality. You can use this service to obtain the network signal information for the specified SIM card.
Available APIs
The radio module provides you with APIs to obtain network signal information. The observer module provides APIs to register or unregister the observer for cellular network status changes. The following table describes the related APIs.
| Category | API | Description | Required Permission |
|---|---|---|---|
| Obtaining a SignalInformation object | radio.getSignalInformation() | Obtains the signal strength of the currently registered cellular network. | N/A |
| Registering the observer for signal information changes | observer.on(‘signalInfoChange’) | Registers the observer for signal information changes. | N/A |
| Unregistering the observer for signal information changes | observer.off(‘signalInfoChange’) | Unregisters the observer for signal information changes. | N/A |
How to Develop
Import required modules.
Call the getSignalInformation() API to obtain the SignalInformation list.
Traverse the SignalInformation list to obtain the signal strength for each radio access technology (RAT) indicated by signalType.
(Optional) Register the observer for signal information changes.
import radio from '@ohos.telephony.radio'
import observer from '@ohos.telephony.observer';
// Obtain the signal strength of the specified SIM card, for example, card 1.
let slotId = 0;
radio.getSignalInformation(slotId, (err, data) => {
if (!err) {
console.log("get signal information success.");
// Traverse the signal information list to obtain the signal strength for each RAT.
for (let j = 0; j < data.length; j++) {
console.log("type:" + data[j].signalType + ", level:" + data[j].signalLevel);
}
} else {
console.log("get signal information fail, err is:" + JSON.stringify(err));
}
});
// (Optional) Register the observer for signal information changes.
observer.on("signalInfoChange", (data) => {
console.log("signal info change, data is:" + JSON.stringify(data));
});
你可能感兴趣的鸿蒙文章
0
赞
- 所属分类： 后端技术
- 本文标签：
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
8、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦