How to use

newInstance

method

in

com.topjohnwu.superuser.Shell

/**
 * Get {@code Shell} via {@link #getCachedShell()} or create new if required.
 * If {@link #getCachedShell()} returns null, it will call {@link #newInstance()} to construct
 * a new {@code Shell}.
 * @see #newInstance()
 * @return a {@code Shell} instance
 */
@NonNull
public synchronized static Shell getShell() {
  Shell shell = getCachedShell();
  if (shell == null) {
    isInitGlobal = true;
    shell = newInstance();
    isInitGlobal = false;
  }
  return shell;
}

  shell = newInstance("su", "--mount-master");
  if (shell.getStatus() != ROOT_MOUNT_MASTER)
    shell = null;
  shell = newInstance("su");
  if (shell.getStatus() != ROOT_SHELL)
    shell = null;
shell = newInstance("sh");

public synchronized static boolean available() {
  if (!Shell.rootAccess()) {
    try {
      Shell.getShell().close();
    } catch (IOException e) {
      e.printStackTrace();
    }
    Shell.newInstance();
    Shell.Sync.su("echo test");
  }
  return Shell.rootAccess();
}