Android 判断是否能真正上网的实例详解
检测网络是否连接
实现代码：
代码语言：javascript复制/**
*
检测网络是否连接
*
*
@return
*/
private
boolean
isNetworkAvailable() {
//
得到网络连接信息
ConnectivityManager
manager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
//
去进行判断网络是否连接
if
(manager.getActiveNetworkInfo() != null)
{
return
manager.getActiveNetworkInfo().isAvailable();
}
return
false;
}ping的状态
代码语言：javascript复制public static final boolean ping() {
String result = null;
try {
String ip = "www.baidu.com";// ping 的地址，可以换成任何一种可靠的外网
Process p = Runtime.getRuntime().exec("ping -c 3 -w 100 " ip);// ping网址3次
// 读取ping的内容，可以不加
InputStream input = p.getInputStream();
BufferedReader in = new BufferedReader(new InputStreamReader(input));
StringBuffer stringBuffer = new StringBuffer();
String content = "";
while ((content = in.readLine()) != null) {
stringBuffer.append(content);
}
Log.d("------ping-----", "result content : " stringBuffer.toString());
// ping的状态
int status = p.waitFor();
if (status == 0) {
result = "success";
return true;
} else {
result = "failed";
}
} catch (IOException e) {
result = "IOException";
} catch (InterruptedException e) {
result = "InterruptedException";
} finally {
Log.d("----result---", "result = " result);
}
return false;
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