问题现象
使用video组件加载网络视频，发现使用蓝牙网络时视频加载较慢，而WiFi网络较快，需要优先使用WiFi网络。
解决措施
{
"module": {
// ...
"requestPermissions":[
{
"name": "ohos.permission.INTERNET",
"reason": "$string:internet_reason",
"usedScene": {
"abilities": [
"EntryAbility"
],
"when": "inuse"
}
},
{
"name" : "ohos.permission.GET_NETWORK_INFO",
"reason": "$string:internet_reason",
"usedScene": {
"abilities": [
"EntryAbility"
],
"when":"inuse"
}
},
]
}
} // WifiManager.ets
import { BusinessError } from '@kit.BasicServicesKit';
import { connection } from '@kit.NetworkKit';
export class WifiManager {
private static instance?: WifiManager;
/**
* Get singleton
*
* @returns Singleton object
*/
public static getInstance(): WifiManager {
if (!WifiManager.instance) {
WifiManager.instance = new WifiManager();
}
return WifiManager.instance;
}
/**
* Start listening for network changes (Wi-Fi network / Bluetooth network / cellular data)
*/
public startListenNetChange(): void {
console.info("registerNetListener");
let netConnectionWifi = connection.createNetConnection({
netCapabilities: {
bearerTypes: [connection.NetBearType.BEARER_WIFI]
}
});
netConnectionWifi.register((error: BusinessError) => {
if (error) {
console.error(`register error: ${error.code}`);
}
});
netConnectionWifi.on('netAvailable', () => {
console.info("netConnectionWifi netAvailable");
this.bindWifiWhenConnected();
});
netConnectionWifi.on('netLost', () => {
console.info("Wifi netLost");
this.bindWifiWhenConnected();
});
let netConnectionBluetooth = connection.createNetConnection({
netCapabilities: {
bearerTypes: [connection.NetBearType.BEARER_BLUETOOTH]
}
});
netConnectionBluetooth.register((error: BusinessError) => {
if (error) {
console.error(`register error: ${error.code}`);
}
});
netConnectionBluetooth.on('netAvailable', () => {
console.info('netConnectionBluetooth netAvailable');
this.bindWifiWhenConnected();
});
netConnectionBluetooth.on('netLost', () => {
console.info('Bluetooth netLost');
this.bindWifiWhenConnected();
});
let netConnectionCellular = connection.createNetConnection({
netCapabilities: {
bearerTypes: [connection.NetBearType.BEARER_CELLULAR]
}
});
netConnectionCellular.register((error: BusinessError) => {
if (error) {
console.error(`register error: ${error.message}`);
}
});
netConnectionCellular.on('netAvailable', () => {
console.info('netConnectionCellular netAvailable');
this.bindWifiWhenConnected();
});
netConnectionCellular.on('netLost', () => {
console.info('Cellular netLost');
this.bindWifiWhenConnected();
});
}
/**
* Connect the App to the Wi-Fi network asynchronously
*/
private async bindWifiWhenConnected(): Promise<void> {
await connection.setAppNet(connection.getDefaultNetSync()).then(() => {
console.info('setAppNet default success')
});
connection.getAllNets().then((data: connection.NetHandle[]) => {
data.forEach(net => {
connection.getNetCapabilities(net).then((data: connection.NetCapabilities) => {
if (data.bearerTypes.length > 0 && data.bearerTypes[0] === connection.NetBearType.BEARER_WIFI) {
connection.setAppNet(net).then(() => {
console.info('setAppNet wifi success');
return;
}).catch((error: Error) => {
console.error(`setAppNet wifi failed, error = ${error.message}`);
})
}
}).catch((error: Error) => {
console.error(`getNetCapabilities error = ${error.message}`);
});
})
}).catch((error: Error) => {
console.error(`getAllNets error = ${error.message}`);
});
}
} import { WifiManager } from './WifiManager'
// Register for change monitoring
WifiManager.getInstance().startListenNetChange(); 参考链接