Android调用系统自带的文件管理器进行文件选择

http://blog.csdn.net/zqchn/article/details/8770913的补充

FileUtils文件

public  class  FileUtils {
    public  static  String getPath(Context context, Uri uri) {

        if  ( "content" .equalsIgnoreCase(uri.getScheme())) {
            String[] projection = { "_data"  };
            Cursor cursor = null ;

            try  {
                cursor = context.getContentResolver().query(uri, projection, null , null , null );
                int  column_index = cursor.getColumnIndexOrThrow( "_data" );
                if  (cursor.moveToFirst()) {
                    return  cursor.getString(column_index);
                }
            } catch  (Exception e) {
                // Eat it
            }
        }

        else  if  ( "file" .equalsIgnoreCase(uri.getScheme())) {
            return  uri.getPath();
        }

        return  null ;
    }
}