Question

有没有办法在我的应用程序上运行终端命令然后访问我的UI上的数据？具体来说是top。

Answer 1

以Log Collector为例。这是relevant file。

关键在于：

ArrayList<String> commandLine = new ArrayList<String>();
commandLine.add("logcat");//$NON-NLS-1$
[...]

Process process = Runtime.getRuntime().exec(commandLine);
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));

Answer 2

好的，这对我来说恰好对我有用，以防将来有人需要它...... :)

环绕尝试并抓住

try {
    Process process = Runtime.getRuntime().exec("top -n 1 -d 1");
    BufferedReader in = new BufferedReader(new InputStreamReader(process.getInputStream()));
} catch (InterruptedException e) {
    e.printStackTrace();
}

Answer 3

我们可以按照以下方式执行命令，我这样做是成功的....尝试这样，这里我们需要指定完整的命令路径。获取完整的命令路径，在你的终端（android）类型

* $ ls

/系统/ bin中*

try {

    // Executes the command.

    Process process = Runtime.getRuntime().exec("/system/bin/ls /sdcard");

    // Reads stdout.
    // NOTE: You can write to stdin of the command using
    //       process.getOutputStream().
    BufferedReader reader = new BufferedReader(
            new InputStreamReader(process.getInputStream()));
    int read;
    char[] buffer = new char[4096];
    StringBuffer output = new StringBuffer();
    while ((read = reader.read(buffer)) > 0) {
        output.append(buffer, 0, read);
    }
    reader.close();

    // Waits for the command to finish.
    process.waitFor();

    return output.toString();
} catch (IOException e) {

    throw new RuntimeException(e);

} catch (InterruptedException e) {

    throw new RuntimeException(e);
}

Answer 4

它还取决于您在终端中运行的内容...如果您在文件上运行“cat”，您也可以这样做。

final private String MEM_FILE = "/proc/meminfo";

public Long readMem() {
    String[] segs;
    FileReader fstream;
    try {
        fstream = new FileReader(MEM_FILE);
    } catch (FileNotFoundException e) {
        Log.e("readMem", "Could not read " + MEM_FILE);
        return false;
    }
    BufferedReader in = new BufferedReader(fstream, 500);
    String line;
    try {
        while ((line = in.readLine()) != null) {
            if (line.indexOf("MemTotal:") > 0) {
                Log.e("MemTotal", line);
                segs = line.trim().split("[ ]+");
                memTotal = Long.parseLong(segs[1]);
            }
            if (line.indexOf("MemFree:") > 0) {
                Log.e("MemFree", line);
                segs = line.trim().split("[ ]+");
                memFree = Long.parseLong(segs[1]);
            }
        }
        updateMem(); //call function to update textviews or whatever
        return true;
    } catch (IOException e) {
        Log.e("readMem", e.toString());
    }
    return false;
}

编辑：在一个名为netmeter的android实验室项目中有一个很好的例子。有一个名为Top.java的类实际上正是您想要的，它在TaskList.java中用于显示。 http://code.google.com/p/android-labs/source/browse/#svn/trunk/NetMeter/src/com/google/android/netmeter

Answer 5

对于 Kotlin 爱好者，可以使用以下方法

fun executeShell() {
    val command: String = "top -n 1"
    try {
        val process: Process = Runtime.getRuntime().exec(command)
        // Read the lines using BufferedReader
        BufferedReader(InputStreamReader(process.inputStream)).forEachLine {
            // Do something on each line read
            Log.d(this::class.java.canonicalName, "$it")
        }
    } catch (e: InterruptedException) {
        Log.w(this::class.java.canonicalName, "Cannot execute command [$command].", e)
    } catch (e: Exception) {
        Log.e(this::class.java.canonicalName, "Cannot execute command [$command].", e)
    }
}

您甚至不需要关闭缓冲区，因为 forEachLine 扩展函数会处理它。

有什么办法以编程方式在android上运行shell命令吗？

5 个答案: