Question

我正在尝试执行以下方法：

public void runAsRoot(String[] cmds) throws Exception {
        Process p = Runtime.getRuntime().exec("su");
        DataOutputStream os = new DataOutputStream(p.getOutputStream());
        InputStream is = p.getInputStream();
        for (String tmpCmd : cmds) {
            os.writeBytes(tmpCmd+"\n");
            int readed = 0;
            byte[] buff = new byte[4096];

            // if cmd requires an output
            // due to the blocking behaviour of read(...)
            boolean cmdRequiresAnOutput = true;
            if (cmdRequiresAnOutput) {
                while( is.available() <= 0) {
                    try { Thread.sleep(200); } catch(Exception ex) {}
                }

                while( is.available() > 0) {
                    readed = is.read(buff);
                    if ( readed <= 0 ) break;
                    String seg = new String(buff,0,readed);
                    Log.i("#>", seg);
                }
            }
        }        
        os.writeBytes("exit\n");
        os.flush();
    }

我使用以下输入调用此方法：

String[] cmds = {"/system/bin/sendevent /dev/input/event0 1 107 0 \n", "sleep 1", "/system/bin/sendevent /dev/input/event0 1 107 1 \n"};
                try {
                    runAsRoot(cmds);
                } catch (Exception e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

但在logcat中我收到以下错误：

07-06 15:19:27.007: E/su(6547): sudb - Opening database
07-06 15:19:27.007: E/(6547): Couldn't open database: unable to open database file
07-06 15:19:27.017: E/su(6547): sudb - Could not open database, prompt user
07-06 15:19:47.082: E/su(6547): select failed with 2: No such file or directory
07-06 15:19:47.082: W/su(6547): request rejected (10060->0 /system/bin/sh)

任何想法是什么问题？

Answer 1

看起来su二进制文件有问题，而不是你的应用程序。检查您是否可以从'adb shell'成功运行root的shell。如果'adb shell'从开始给你一个root的shell，运行'su 1000'以失去root权限，然后运行'su'以尝试再次进入root的shell。如果失败，su就无法正常工作。

哦，并且在相关的说明中：确保在另一个线程中运行su，可能通过Handler或AsyncTask，因此它不会阻止您的UI线程。

从android活动执行su命令

1 个答案: