如何检测WiFi或GPRS信号强度是强还是弱 [英] How to detect Wifi or GPRS signal strength is strong or weak
问题描述
我开发一个Android应用程序中，我称之为web服务。我的问题是，如果我拨打电话到互联网服务和无线或GPRS强度较弱，那么我的应用程序强制关闭。我如何可以检测如果WiFi或GPRS信号强度是强还是弱？
I am developing an android application in which I call a webservices. My problem is that if I make a call to the webservice and the wifi or GPRS strength is weak, then my application force close. How can I detect if the wifi or GPRS signal strength is strong or weak?
推荐答案
首先，确保你有＆LT;使用许可权＆GT;对于ACCESS_WIFI_STATE 在你的清单。
First, make sure you have <uses-permission> for ACCESS_WIFI_STATE in your manifest.
二，我不知道有关通知的单个连接，但把一切无线电是看到通知，就可以开始扫描：
Second, I'm not sure about notifications for a single connection, but to get notifications of everything the radio is seeing, you can start a scan:
wifi.startScan();
接下来，当我收到了成功的结果，我在IntentFilter的使用 WifiManager.SCAN_RESULTS_AVAILABLE_ACTION 。
然后，在接收器，我使用 getScanResults（）从WifiManager对象，其中也包含了信号的强度。
Then, in the receiver, I use getScanResults() from the WifiManager object, which also contains the signal strength.
有关停止这种方式，您只需致电unregisterRecever（）（所以你要围绕保持它引用）。我没有测试过自己，看看我的扫描code可以修改为只检查当前的连接，但我知道我有很多的结果 - Wi-Fi信号频繁和迅速改变。我想监视单个连接，您也可以只过滤扫描结果，寻找一个设备当前连接。
For stopping it this way, you simply call to unregisterRecever() (so you'll want to keep it around for referencing). I haven't tested myself to see if my scanning code can be modified to just check the current connection, but I do know I got plenty of results -- Wi-Fi signals change frequently and quickly. I suppose for monitoring a single connection, you can also just filter the scan results and look for the one the device is currently connected to.
我希望这有助于一点。
<一个href=\"http://stackoverflow.com/questions/1206891/android-how-to-monitor-wifi-signal-strength\">Android:如何监视WiFi信号强度
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