Android中級篇之用JAVA代碼執行shell命令

代碼部分 ：

1. package com.yin.system_analysis;
2. import java.io.File;
3. import java.io.IOException;
4. import java.io.InputStream;
5. import android.app.Activity;
6. import android.os.Bundle;
7. import android.util.Log;
8. import android.view.View;
9. import android.view.View.OnClickListener;
10. import android.widget.Button;
11. import android.widget.TextView;
12. public class MainActivity extends Activity {
13. private final static String[] ARGS = {"ls","-l"};
14. private final static String TAG = "com.yin.system";
15. Button mButton;
16. TextView myTextView;
17. public void onCreate(Bundle savedInstanceState) {
18. super.onCreate(savedInstanceState);
19. setContentView(R.layout.main);
20. mButton = (Button) findViewById(R.id.myButton);
21. myTextView = (TextView) findViewById(R.id.textView);
23. mButton.setOnClickListener(new OnClickListener() {
25. public void onClick(View v) {
27. myTextView.setText(getResult());
28. }
29. });
30. }
31. public String getResult(){
32. ShellExecute cmdexe = new ShellExecute ( );
33. String result="";
34. try {
35. result = cmdexe.execute(ARGS, "/");
36. } catch (IOException e) {
37. Log.e(TAG, "IOException");
38. e.printStackTrace();
39. }
40. return result;
41. }
42. private class ShellExecute {
43. /*
44. * args[0] : shell 命令 如"ls" 或"ls -1";
45. * args[1] : 命令執行路徑 如"/" ;
46. */
47. public String execute ( String [] cmmand,String directory)
48. throws IOException {
49. String result = "" ;
50. try {
51. ProcessBuilder builder = new ProcessBuilder(cmmand);
53. if ( directory != null )
54. builder.directory ( new File ( directory ) ) ;
55. builder.redirectErrorStream (true) ;
56. Process process = builder.start ( ) ;
58. //得到命令執行後的結果
59. InputStream is = process.getInputStream ( ) ;
60. byte[] buffer = new byte[1024] ;
61. while ( is.read(buffer) != -1 ) {
62. result = result + new String (buffer) ;
63. }
64. is.close ( ) ;
65. } catch ( Exception e ) {
66. e.printStackTrace ( ) ;
67. }
68. return result ;
69. }
70. }
71. }

布局文件很簡單就不列出了