Android: 通过Runtime.getRuntime().exec调用底层Linux下的程序或脚本

Posted 2020-07-22 Rosepotato

Android Runtime使得直接调用底层Linux下的可执行程序或脚本成为可能

比如Linux下写个测试工具，直接编译后apk中通过Runtime来调用

或者写个脚本，apk中直接调用，省去中间层或者JNI

这个至少效率应该比较高吧

 

 

代码:

[java] view plaincopy

 

1.  1 public class test extends Activity {  
    2     TextView text;  
    3       
    4     /** Called when the activity is first created. */  
    5     @Override  
    6     public void onCreate(Bundle savedInstanceState) {  
    7         super.onCreate(savedInstanceState);  
    8         setContentView(R.layout.main);  
    9           
   10         text = (TextView) findViewById(R.id.text);  
   11           
   12         Button btn_ls = (Button) findViewById(R.id.btn_ls);  
   13         btn_ls.setOnClickListener(new OnClickListener() {  
   14             public void onClick(View v) {                 
   15                 do_exec("ls /mnt/sdcard");  
   16             }             
   17         });  
   18         Button btn_cat = (Button) findViewById(R.id.btn_cat);  
   19         btn_cat.setOnClickListener(new OnClickListener() {  
   20             public void onClick(View v) {                 
   21                 do_exec("cat /proc/version");  
   22             }             
   23         });          
   24         Button btn_rm = (Button) findViewById(R.id.btn_rm);  
   25         btn_rm.setOnClickListener(new OnClickListener() {  
   26             public void onClick(View v) {                 
   27                 do_exec("rm /mnt/sdcard/1.jpg");  
   28             }             
   29         });      
   30         Button btn_sh = (Button) findViewById(R.id.btn_sh);  
   31         btn_sh.setOnClickListener(new OnClickListener() {  
   32             public void onClick(View v) {                 
   33                 do_exec("/system/bin/sh /mnt/sdcard/test.sh 123");  
   34             }             
   35         });           
   36     }  
   37       
   38     String do_exec(String cmd) {  
   39         String s = "/n";  
   40         try {  
   41             Process p = Runtime.getRuntime().exec(cmd);  
   42             BufferedReader in = new BufferedReader(  
   43                                 new InputStreamReader(p.getInputStream()));  
   44             String line = null;  
   45             while ((line = in.readLine()) != null) {  
   46                 s += line + "/n";                 
   47             }  
   48         } catch (IOException e) {  
   49             // TODO Auto-generated catch block  
   50             e.printStackTrace();  
   51         }  
   52         text.setText(s);  
   53         return cmd;       
   54     }  
   55 }  
   56  

    

    

test.sh:

echo test.sh
echo $1

 

需要注意:

1. exec不等于console命令

2. exec的输入输出流需要自己处理

3. exec执行时阻塞、非阻塞，返回结果问题

4. 注意权限问题 

 

有个文章讲的比较深入，贴出来研究:

http://blog.csdn.net/zmyde2010/archive/2011/01/12/6130895.aspx

http://kuangbaoxu.javaeye.com/blog/210291