Android TV判断网线拔插状态

//在java代码中执行adb命令
public String execCommand(String command) {
Runtime runtime;
Process proc = null;
StringBuffer stringBuffer = null;
try {
runtime = Runtime.getRuntime();
proc = runtime.exec(command);
stringBuffer = new StringBuffer();
if (proc.waitFor() != 0) {
System.err.println("exit value = " + proc.exitValue());
}
BufferedReader in = new BufferedReader(new InputStreamReader(
proc.getInputStream()));

String line = null;
while ((line = in.readLine()) != null) {
stringBuffer.append(line + " ");
}

} catch (Exception e) {
System.err.println(e);
} finally {
try {
proc.destroy();
} catch (Exception e2) {
}
}
return stringBuffer.toString();
}
//判断网线拔插状态
//通过命令cat /sys/class/net/eth0/carrier，如果插有网线的话，读取到的值是1，否则为0
public boolean isWirePluggedIn(){
String state= execCommand("cat /sys/class/net/eth0/carrier");
if(state.trim().equals("1")){  //有网线插入时返回1，拔出时返回0
return true;
}
return false;
}