如何获得的WiFi接入点的连接强度？ [英] How to get the connection strength of Wifi access points?

问题描述

我建立一个应用程序读取每个可用的WiFi接入点的信号强度。

I am building an application reading the signal strength of each available Wifi access point.

我已经写了code这样的：

I've written code like:

    wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);

    // Get WiFi status
    WifiInfo info = wifi.getConnectionInfo();
    textStatus.append("\n\nWiFi Status: " + info.toString());

    // List available networks
    List<WifiConfiguration> configs = wifi.getConfiguredNetworks();

不过，我有两个问题：

However, I have two problems:

1. 在调试时，的configs 只包含一个连接。不过，我可以看到，有系统的WiFi设置几个可用的接入点。即的configs 是一个不完整的清单。

1. In debugging, configs only contains one connection. However, I can see that there are several APs available in the system's wifi setting. I.e. configs is an incomplete list.

我不知道如何获得的信号强度在 WifiConfiguration 。

I don't know how to get the signal strength in WifiConfiguration.

顺便说一句，我使用的HTC Hero和Android 1.5。

btw, I am using HTC Hero and Android 1.5.

推荐答案

根据Android的API文档<一href="http://developer.android.com/reference/android/net/wifi/WifiManager.html#getConfiguredNetworks%28%29">WifiManager.getConfiguredNetworks()不填写的信号强度paramters。此数据仅重presents记住的接入点设置，不可见的。

According to the Android API documentation WifiManager.getConfiguredNetworks() does not fill the signal strength paramters. This data only represents the remembered access point settings, not the visible ones.

要获得实际可见的网络，你必须调用<一href="http://developer.android.com/reference/android/net/wifi/WifiManager.html#startScan%28%29">WifiManager.startScan()启动WiFi无线电扫描和<一href="http://developer.android.com/reference/android/net/wifi/WifiManager.html#getScanResults%28%29">WifiManager.getScanResults()一段时间后获得的扫描效果。

To get actually visible networks you must call WifiManager.startScan() to initiate WiFi radio scanning and WifiManager.getScanResults() after a while to get the scanning results.

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