JAVA代码执行shell命令 并解析

     在Android可能有的系统信息没有直接提供API接口来访问，为了获取系统信息时我们就要在用shell指令来获取信息，这时我们可以在代码中来执行命令 ，这里主要用到ProcessBuilder 这个类.

代码部分  ：

 package com.yin.system_analysis;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import android.app.Activity;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;
 import android.widget.TextView;
 public class MainActivity extends Activity {
     private final static String[] ARGS = {"ls","-l"};
     private final static String TAG = "com.yin.system";
     Button mButton;
     TextView myTextView;
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);
         mButton = (Button) findViewById(R.id.myButton);
         myTextView = (TextView) findViewById(R.id.textView);

         mButton.setOnClickListener(new OnClickListener() {

             public void onClick(View v) {

                 myTextView.setText(getResult());
             }
         });
     }
     public String getResult(){
          ShellExecute cmdexe = new ShellExecute ( );
          String result="";
          try {
             result = cmdexe.execute(ARGS, "/");
         } catch (IOException e) {
             Log.e(TAG, "IOException");
             e.printStackTrace();
         }
         return result;
     }
     private class ShellExecute {
         /*
          * args[0] : shell 命令  如"ls" 或"ls -1";
          * args[1] : 命令执行路径  如"/" ;
          */
         public String execute ( String [] cmmand,String directory)
         throws IOException {
         String result = "" ;
         try {
         ProcessBuilder builder = new ProcessBuilder(cmmand);

         if ( directory != null )
         builder.directory ( new File ( directory ) ) ;
         builder.redirectErrorStream (true) ;
         Process process = builder.start ( ) ;

         //得到命令执行后的结果
         InputStream is = process.getInputStream ( ) ;
         byte[] buffer = new byte[1024] ;
         while ( is.read(buffer) != -1 ) {
         result = result + new String (buffer) ;
         }
         is.close ( ) ;
         } catch ( Exception e ) {
             e.printStackTrace ( ) ;
         }
         return result ;
         }
     }
 }