如何将进程的标准输出绑定到 TextView

发布于 2024-10-18 09:19:40 字数 621 浏览 0 评论 0原文

我正在开发我的第一个 Android 应用程序。我需要以 root 用户身份在 shell 中执行命令，因此我在我的应用程序中引入了以下代码：

process = Runtime.getRuntime().exec("su");

然后我获得进程的输出流并使用它来执行命令：

os = new DataOutputStream(process.getOutputStream());

os.writeBytes("tcpdump\n");

然后我获得一个输入流想要用于显示过程的结果：

is = new DataInputStream(process.getInputStream());

我想将获得的 DataInputStream 绑定到布局中的 TextView，以便它显示的文本随着过程继续显示结果而实时更新。

我一直在搜索 android 的 java.io API，但找不到一个简单的方法来做到这一点。我一直在考虑运行一个带有循环的线程，该循环不断检查输入流中是否有新数据，然后将其复制到 TextView，但这似乎是一个蹩脚的解决方案。

如果有人知道如何做到这一点，我会感谢你。

原文

I'm developping my first Android App. I need to execute a command in a shell as the root user so I've introduced this code in my App:

process = Runtime.getRuntime().exec("su");

Then I obtain an output stream to the process and I use it to execute the command:

os = new DataOutputStream(process.getOutputStream());

os.writeBytes("tcpdump\n");

Then I obtain an input stream which I want to use for displaying the results of the process:

is = new DataInputStream(process.getInputStream());

I would like to bind the obtained DataInputStream to a TextView in the layout so the text that it displays gets updated in real time as the process goes on showing results.

I've been searching trought the java.io API for android and I can't find an easy way to do this. I've been thinking in running a thread with a loop which continously checks if there is new data in the input stream and then copy it to the TextView but this seems a crappy solution.

I would thank you if anyone knows a way to do this.

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谢绝鈎搭 2024-10-25 09:19:40

Channel channel = session.openChannel("shell");

OutputStream os = new OutputStream() {

    @Override
    public void write(int oneByte) throws IOException {
        TextView textView1 = (TextView) findViewById(R.id.textView1);
        char ch = new Character((char) oneByte);
        textView1.setText(textView1.getText() + String.valueOf(ch));
        System.out.write(oneByte);
    }
};

// channel.setOutputStream(System.out);
channel.setOutputStream(os, true);

Channel channel = session.openChannel("shell");

OutputStream os = new OutputStream() {

    @Override
    public void write(int oneByte) throws IOException {
        TextView textView1 = (TextView) findViewById(R.id.textView1);
        char ch = new Character((char) oneByte);
        textView1.setText(textView1.getText() + String.valueOf(ch));
        System.out.write(oneByte);
    }
};

// channel.setOutputStream(System.out);
channel.setOutputStream(os, true);

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