android 读取系统文件 wpa_supplicant

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1,需要权限

<uses-permission android:name="android.permission.ACCESS_SUPERUSER" />

2，下载 RootTools.jar包。

3，两个关键方法。主要是获取shell,并执行命令行。

方法如下：

  private static boolean waitForCommand(Command cmd) {        while (!cmd.isFinished()) {            synchronized (cmd) {                try {                    if (!cmd.isFinished()) {                        cmd.wait(2000);                    }                } catch (InterruptedException e) {                    e.printStackTrace();                }            }            if (!cmd.isExecuting() && !cmd.isFinished()) {                //         Logger.errorST("Error: Command is not executing and is not finished!");                return false;            }        }        //Logger.debug("Command Finished!");        return true;    }    public static ArrayList<String> runAndWait1(String cmd, final boolean root) {        final ArrayList<String> output = new ArrayList<String>();        Command cc = new Command(1, cmd) {            @Override            public void commandOutput(int i, String s) {                output.add(s);//        System.out.println("output "+root+s);            }            @Override            public void commandTerminated(int i, String s) {                System.out.println("error" + root + s);            }            @Override            public void commandCompleted(int i, int i2) {            }        };        try {            RootTools.getShell(root).add(cc);        } catch (Exception e) {            //       Logger.errorST("Exception when trying to run shell command", e);            e.printStackTrace();            return null;        }        if (!waitForCommand(cc)) {            return null;        }        return output;    }

4，接下来就是简单的调用了。

final  File f=new File("/data/misc/wifi/wpa_supplicant.conf"); new Thread(){     @Override     public void run() {         super.run();         ArrayList<String> list=new ArrayList<String>();       //  String cpath = getCommandLineString(f.getPath());         String s="cat " + f.getPath();         list = runAndWait1(s, true);         for (int i = 0; i < list.size(); i++) {             Log.e("content",list.get(i));         }     } }.start();

输出结果如下：

2 0