提权代码

public static boolean upgradeRootPermission(String pkgCodePath) {
    Process process = null;
    DataOutputStream os = null;
    try {
        String cmd = "chmod 777 " + pkgCodePath;
        process = Runtime.getRuntime().exec("su"); //切换到root帐号
        os = new DataOutputStream(process.getOutputStream());
        os.writeBytes(cmd + "\n");
        os.writeBytes("exit\n");
        os.flush();
        process.waitFor();
    } catch (Exception e) {
        return false;
    } finally {
        try {
            if (os != null) {
                os.close();
            }
            process.destroy();
        } catch (Exception e) {
        }
    }
    try {
        return process.waitFor() == 0;
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    return false;
}