android执行shell命令和拷贝文件夹

最新推荐文章于 2024-08-04 03:25:52 发布

转载最新推荐文章于 2024-08-04 03:25:52 发布 · 3.6k 阅读

文章标签：

#shell #android #string #buffer #byte #file

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本文介绍了一个用于执行Shell命令的Java类，并提供了一个方法用于从应用资源中复制文件到指定路径。通过ProcessBuilder实现了命令的执行并获取其输出结果。

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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 ;  
        }  

    } 

private boolean copyAssetFile(String assetsFileName,String filePath){
          try {
           InputStream is = getResources().getAssets().open(assetsFileName);
           
                    File outFile = new File(filePath, assetsFileName);      
                    if(outFile.exists())   
                        outFile.delete();         
                    OutputStream out = new FileOutputStream(outFile);      
                
                    byte[] buf = new byte[1024];      
                    int len;      
                    while ((len = is.read(buf)) > 0)      
                    {      
                        out.write(buf, 0, len);      
                    }    
              
                    is.close();      
                    out.close();
           
          } catch (IOException e) {
           System.out.println("copy file error");
           e.printStackTrace();
          }
          return true;
         }