Any Way to Run Shell Commands on Android Programmatically

Any way to run shell commands on android programmatically?

Check out Log Collector as an example. Here is the relevant file.

The key is here:

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()));

executing shell commands programmatically in Android

exec in Java starts a new process. So the first line makes a new su process, which is going to simply sit there and wait for your input. The second line starts a new dhcpcd process, which won't be privileged and so won't produce useful output.

What you want is to run dhcpcd using su, typically like this:

exec("su -c dhcpcd eth0")

Execute shell commands and get output in a TextView

You can run command and display command output into text as below :

public class MainActivity extends Activity {

    TextView tv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tv=(TextView)findViewById(R.id.cmdOp);
        tv.setText("Output :"+"\n"+runAsRoot());
    }

    public String runAsRoot() {

        try {
            // Executes the command.
            Process process = Runtime.getRuntime().exec("ls -l");

            // 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);
        }
    }
}

Note : The "su" command does only run if the device is rooted. Otherwise it throws an exception.

How to run cmd/shell commands from android studio programmatically?

You can't execute ADB directly from an android device.

You'll need to write a desktop application which executes the command and can be called by the android application, or (easier) use an automation software to call remote commands from your phone.

Run shell commands from android program

You can't simply run 'su' on the emulator, there's no root access by default. You'll need to install the 'su' program as well as the SuperUser.apk, and you'll have to do this each time you start the emulator unless using snapshots.

More information and links to the files you need can be found here on SO as well as this blog post by Russell Davis

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