如何在android中停止run.exec()启动的进程

概述如何阻止“ping”？以下代码是我尝试的方式,但它失败了. private class pingWifi implements Runnable { Process p = null; @Override public void run() { // TODO Auto-generated method stub /* 如何阻止“Ping”？以下代码是我尝试的方式,但它失败了.

private class PingWifi implements Runnable {           Process p = null;    @OverrIDe    public voID run() {        // Todo auto-generated method stub        /*         * WifiInfo info=mWifiManager.getConnectionInfo(); int         * ip=info.getIpAddress(); String ips=Formatter.formatIpAddress(ip);         */        System.out.println("PingWifi runnable");        String[] shell = new String[] { "/system/bin/sh","-c"," " };        Runtime run = Runtime.getRuntime();        shell[2] = "Ping " + ipAddress;        try {            p = run.exec(shell);            if (p.waitFor() != 0) {                if (p.exitValue() == 1) {                    byte[] buff = new byte[1024];                    inputStream is = p.getErrorStream();                    int c;                    c = is.read(buff,1024);                    System.out.println("Ping error: " + new String(buff));                }            } else {                byte[] buff = new byte[1024];                inputStream is = p.getinputStream();                int c;                c = is.read(buff,1024);                System.out.println("Ping result: " + new String(buff));                // wait for harDWare            }        } catch (Exception e) {            // Todo: handle exception            e.printstacktrace();        }    }voID stopProcess() {        if (p != null) {            p.destroy();        }else{            System.out.println("stopProcess: p==null");        }    }    }private PingWifi mPingWifi = new PingWifi();    Thread wifiThread = new Thread(mPingWifi);            wifiThread.start();

在onPause中我调用了mPingWifi.stopProcess(),结果是“stopProcess：p == null”.我仍然可以在“ps”列表中找到Ping进程.

我也想用“pkill Ping”命令.但是AndroID shell中不支持“pkill”命令.我的目标是Ping不是“停止”,直到“主页或后退”键事件发生.谢谢！

解决方法 尝试覆盖后退按钮并在其中调用Process.destroy().

例：

public voID onBackpressed() {p.destroy();}

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