判斷網路的情況中，有個比較麻煩的情況就是連上了某個網路，但是那個網路無法上網 ，，， = =
想到了用ping指令來判斷，經測試，可行~ ~ ~
private static final boolean ping() {
String result = null;
try {
String ip = "www.baidu.com";// 除非百度掛了，否則用這個應該沒問題~
Process p = Runtime.getRuntime().exec("ping -c 3 -w 100 " + ip);//ping3次
// 讀取ping的內容，可不加。
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.i("TTT", "result content : " + stringBuffer.toString());
// PING的狀態
int status = p.waitFor();
if (status == 0) {
result = "successful~";
return true;
} else {
result = "failed~ cannot reach the IP address";
}
} catch (IOException e) {
result = "failed~ IOException";
} catch (InterruptedException e) {
result = "failed~ InterruptedException";
} finally {
Log.i("TTT", "result = " + result);
}
return false;
}