Question

I m new android app developer
I want to know how to run a bash script from my android activity

我是这样说的。

public void RunAsRoot(String[] cmds) {
    Process p = Runtime.getRuntime().exec("su");
    DataOutputStream os = new DataOutputStream(p.getOutputStream());            
    for (String tmpCmd : cmds) {
       os.writeBytes(tmpCmd+"
");
    }           
    os.writeBytes("exit
");  
    os.flush();
}

但现在我有许多错误:

“https://i.stack.imgur.com/4N4KC.png”</p

Answer 1

我认为,你刚刚需要用“try/ submissions栏号,即“Java”规则,来绕过这部法规:

public void RunAsRoot(String[] cmds) {
    Process p = null;
    try {
        p = Runtime.getRuntime().exec("su");
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    DataOutputStream os = new DataOutputStream(p.getOutputStream());            
    for (String tmpCmd : cmds) {
       try {
        os.writeBytes(tmpCmd+"
");
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    }           
    try {
         os.writeBytes("exit
");
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }  
    try {
        os.flush();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

Second, manually execute su, then the command id to see if can become a root, just in case.

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