[Android] 我如何来重构WLAN测试程序？

最新推荐文章于 2025-03-25 11:17:13 发布

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本文阐述了重构WLAN测试程序的原因，包括改进UI设计、直观呈现测试流程，并提供了开启、搜索、连接和关闭WLAN的具体步骤。同时，介绍了如何设计友好的用户界面布局，以提升用户体验。

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我如何来重构WLAN测试程序？

Preface

”我为什么要重构WLAN测试程序？“

（1）UI设计很烂

（2）测试流程不能直观地呈现

1. WLAN

2. 打开WLAN

你需要使用到WifiManager服务, 参考mWifiManager = (WifiManager)getSystemService(Context.WIFI_SERVICE)

然后你调用mWifiManger.setWifiEnable(true)开启wifi。

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

mWifiManager.setWifiEnable(true);

3. 搜索WLAN

在你发送搜寻请求之前，需要确认WiFi成功被开启。那怎样获得wifi开启或者是关闭的状态呢？获得Wifi状态

最好的方式是注册侦听wifi事件，你可以参看如下来自于SDK的详细描述：

String WIFI_STATE_CHANGED_ACTION Broadcast intent action indicating that Wi-Fi has been enabled, disabled, enabling, disabling, or unknown.

你在注册Broadcast receiver时回用到Intent以及Intent Extra字段，它保存了wifi的状态信息。如下来自SDK的描述：

public static final String EXTRA_WIFI_STATE

Added in API level 1

The lookup key for an int that indicates whether Wi-Fi is enabled, disabled, enabling, disabling, or unknown. Retrieve it with getIntExtra(String, int).

public boolean startScan ()

Added in API level 1

Request a scan for access points. Returns immediately. The availability of the results is made known later by means of an asynchronous event sent on completion of the scan.

Returns

true if the operation succeeded, i.e., the scan was initiated

再次提醒，你需要明白它是一次异步调用，它并不会立即返回结果。搜寻结果会在一小段时间后由Wifi service发送给你。

那你怎么知道Wifi service已经为你准备OK？通过捕获来自wifi service的广播事件，会是一种不错的放松。

“哦！我要的结果已经被准备好，我这就去拿出来！”

public static final String SCAN_RESULTS_AVAILABLE_ACTION

Added in API level 1

An access point scan has completed, and results are available from the supplicant. CallgetScanResults() to obtain the results.

可能你也看到了，通过调用getScanResult()来得到搜需结果，函数的描述信息如下：

public List<ScanResult> getScanResults ()

Added in API level 1

Return the results of the latest access point scan.

Returns

the list of access points found in the most recent scan.

可以看到的是搜需结果(scan results)被保存进一串列表(list)，列表存放了由ScanResult类封装的数据。

Fields
public String	BSSID	The address of the access point.
public String	SSID	The network name.
public String	capabilities	Describes the authentication, key management, and encryption schemes supported by the access point.
public int	frequency	The frequency in MHz of the channel over which the client is communicating with the access point.
public int	level	The detected signal level in dBm.
public long	timestamp	Time Synchronization Function (tsf) timestamp in microseconds when this result was last seen.