Executes the command and its arguments in a native process. - Android Android OS

Android examples for Android OS:Process

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Description

Executes the command and its arguments in a native process.

Demo Code


import java.io.InputStream;
import java.util.Scanner;

public class Main {
  private static boolean DEBUG = System.getProperty("cts.vm-tests.debug") != null;

  /**//ww  w. j a  va2s.  c  o m
   * Executes the command and its arguments in a native process.
   * 
   * @param commandAndArgs
   *          a string array to be passed containing the executable and its
   *          arguments
   * @param okIndicator
   *          if not null, this String must occur in the stdout of the executable
   *          (since only checking for the return code is not sufficient e.g. for
   *          adb shell cmd)
   * @throws Exception
   *           thrown by the underlying command in case of an error.
   */
  public static void digestCommand(String[] commandAndArgs, String okIndicator) {
    RuntimeException re = null;
    try {
      String c = "";
      for (int i = 0; i < commandAndArgs.length; i++) {
        c += commandAndArgs[i] + " ";
      }
      if (DEBUG)
        System.out.print("com: " + c);
      StringBuilder sb = new StringBuilder();
      ProcessBuilder pb = new ProcessBuilder(commandAndArgs).redirectErrorStream(true);
      Process p = pb.start();

      InputStream is = p.getInputStream();
      Scanner scanner = new Scanner(is);
      int retCode = p.waitFor();
      while (scanner.hasNextLine()) {
        sb.append(scanner.nextLine());
      }
      scanner.close();
      if (retCode != 0 || (okIndicator != null && !sb.toString().contains(okIndicator))) {
        String msg = sb.toString() + "\nreturn code: " + retCode;
        re = new RuntimeException(msg);
        if (DEBUG)
          System.out.println("-> error! msg:" + msg);
      } else {
        if (DEBUG)
          System.out.println(" -> " + retCode);
      }
    } catch (Exception e) {
      throw new RuntimeException("Exception occurred: " + e.getClass().getName() + ", msg:" + e.getMessage());
    } finally {
      if (re != null) {
        throw re;
      }
    }
  }
}

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