Android 获取实时网速实现详解
目录
- 正文
- TrafficStats简介
- 实现获取网速
- 实时网速
正文
最近接到个需求,需要计算WebView
加载网页时的网速。查询了一下,Android没有提供直接获取网速的Api,但是提供了获取流量的类TrafficStats
。本文介绍如何使用Trafficstats
来实现获取网速功能。
TrafficStats简介
TrafficStats
提供了一些获取设备从本次开机到目前为止传输/接收的流量的接口,如下:
方法 | 参数 | 说明 |
---|---|---|
getTotalTxBytes | - | 获取设备本次开机到目前为止,WI-FI、流量下传输的字节总数。 |
getTotalRxBytes | - | 获取设备本次开机到目前为止,WI-FI、流量下接收的字节总数。 |
getMobileTxBytes | - | 获取设备本次开机到目前为止,流量下传输的字节总数。 |
getMobileRxBytes | - | 获取设备本次开机到目前为止,流量下接收的字节总数。 |
getUidTxBytes | uid | 获取应用从本次开机到目前为止,WI-FI、流量下传输的字节总数。 |
getUidRxBytes | uid | 获取应用从本次开机到目前为止,WI-FI、流量下接收的字节总数。 |
上述接口可以满足实现计算网速的需求,TrafficStats
类其他接口可以查看官方文档。
实现获取网速
可以通过一段时间内传输的流量除去时间计算出上行网速,通过一段时间内接收的流量除去时间计算出下行网速。
TrafficStats
类的接口获取的网速是从开机时就开始计算的,因此,要计算一段时间内的流量需要在开始时获取一次流量数据,结束时获取一次流量数据,相减得出一段时间的实际流量。
实时网速
本文用getUidTxBytes
和getUidRxBytes
来演示,其他方法也是类似的,如下:
object NetSpeedUtils { var netSpeedCallback: NetSpeedCallback? = null private var timer: Timer? = null private var timerTask: TimerTask? = null private var lastTotalReceiveBytes: Long = 0 private var lastTotalTransferBytes: Long = 0 /** * 根据应用uid获取设备启动以来,该应用接收到的总字节数 * * @param uid 应用的uid */ fun getTotalReceiveBytes(): Long { var receiveBytes: Long = TrafficStats.UNSUPPORTED.toLong() ExampleApplication.exampleContext?.run { receiveBytes = TrafficStats.getUidRxBytes(applicationInfo.uid) } // 当获取不到时,会返回TrafficStats.UNSUPPORTED return if (receiveBytes == TrafficStats.UNSUPPORTED.toLong()) 0 else receiveBytes / 1024 } /** * 根据应用uid获取设备启动以来,该应用传输的总字节数 * * @param uid 应用的uid */ fun getTotalTransferBytes(): Long { var transferBytes: Long = TrafficStats.UNSUPPORTED.toLong() ExampleApplication.exampleContext?.run { transferBytes = TrafficStats.getUidTxBytes(applicationInfo.uid) } // 当获取不到时,会返回TrafficStats.UNSUPPORTED return if (transferBytes == TrafficStats.UNSUPPORTED.toLong()) 0 else transferBytes / 1024 } // 通过Timer每隔1秒计算网速 private fun calculateNetSpeed() { ExampleApplication.exampleContext?.run { val nowTotalReceiveBytes = getTotalReceiveBytes() val nowTotalTransferBytes = getTotalTransferBytes() val downloadSpeed = nowTotalReceiveBytes - lastTotalReceiveBytes val uploadSpeed = nowTotalTransferBytes - lastTotalTransferBytes lastTotalReceiveBytes = nowTotalReceiveBytes lastTotalTransferBytes = nowTotalTransferBytes netSpeedCallback?.onNetSpeedChange("$downloadSpeed kb/s", "$uploadSpeed kb/s") } } fun startMeasuringNetSpeed() { if (timer == null && timerTask == null) { timer = Timer() timerTask = object : TimerTask() { override fun run() { calculateNetSpeed() } } timer?.run { timerTask?.let { schedule(it, 0L, 1000L) } } } } fun stopMeasuringNetSpeed() { timerTask?.cancel() timerTask = null timer?.cancel() timer = null } interface NetSpeedCallback { fun onNetSpeedChange(downloadSpeed: String, uploadSpeed: String) } } // 示例类 class TrafficStatsActivity : BaseGestureDetectorActivity() { private lateinit var binding: LayoutTrafficStatsActivityBinding @SuppressLint("SetTextI18n") override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) binding = DataBindingUtil.setContentView(this, R.layout.layout_traffic_stats_activity) binding.includeTitle.tvTitle.text = "TrafficStatsExample" NetSpeedUtils.netSpeedCallback = object : NetSpeedUtils.NetSpeedCallback { override fun onNetSpeedChange(downloadSpeed: String, uploadSpeed: String) { binding.tvNetSpeed.run { post { text = "downloadSpeed:$downloadSpeed , uploadSpeed:$uploadSpeed" } } } } binding.btnStartMeasureNetSpeed.setOnClickListener { NetSpeedUtils.startMeasuringNetSpeed() } binding.btnStopMeasureNetSpeed.setOnClickListener { NetSpeedUtils.stopMeasuringNetSpeed() } initWebViewSetting(binding.webView) binding.webView.loadUrl("https://go.minigame.vip/") } @SuppressLint("JavascriptInterface", "SetJavaScriptEnabled") private fun initWebViewSetting(webView: WebView?) { webView?.run { settings.cacheMode = WebSettings.LOAD_DEFAULT settings.domStorageEnabled = true settings.allowContentAccess = true settings.allowFileAccess = true settings.useWideViewPort = true settings.loadWithOverviewMode = true settings.mixedContentMode = WebSettings.MIXED_CONTENT_ALWAYS_ALLOW settings.javaScriptEnabled = true settings.javaScriptCanOpenWindowsAutomatically = true settings.setSupportMultipleWindows(true) } } override fun onDestroy() { super.onDestroy() binding.webView.clearHistory() binding.webView.loadDataWithBaseURL(null, "", "text/html", "utf-8", null) binding.root.run { if (this is ViewGroup) { this.removeView(binding.webView) } } binding.webView.destroy() } }
效果如图:
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