安卓调用应用打开文件

应用中如何调用系统所装的软件打开一个文件，这是我们经常碰到的问题，下面是我所用到的一种方法，和大家一起分享一下！

这个是打开文件的一个方法：

 

Java代码  



  

private void openFile(File file){  

      

    Intent intent = new Intent();  

    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);  

    //设置intent的Action属性  

    intent.setAction(Intent.ACTION_VIEW);  

    //获取文件file的MIME类型  

    String type = getMIMEType(file);  

    //设置intent的data和Type属性。  

    intent.setDataAndType(Uri.fromFile(file), type);  

    //跳转  

    startActivity(intent);    

      

}  

  

  

private String getMIMEType(File file) {  

      

    String type="*  

    String end=fName.substring(dotIndex,fName.length()).toLowerCase();  

    if(end=="")return type;  

    //在MIME和文件类型的匹配表中找到对应的MIME类型。  

    for(int i=0;i//MIME_MapTable??在这里你一定有疑问，这个MIME_MapTable是什么？  

        if(end.equals(MIME_MapTable[i][0]))  

            type = MIME_MapTable[i][1];  

    }         

    return type;  

}  

 

 

 

 

 MIME_MapTable是所有文件的后缀名所对应的MIME类型的一个String数组：

Java代码  



"white-space: pre;">    private final String[][] MIME_MapTable={  

            //{后缀名， MIME类型}  

            {".3gp",    "video/3gpp"},  

            {".apk",    "application/vnd.android.package-archive"},  

            {".asf",    "video/x-ms-asf"},  

            {".avi",    "video/x-msvideo"},  

            {".bin",    "application/octet-stream"},  

            {".bmp",    "image/bmp"},  

            {".c",  "text/plain"},  

            {".class",  "application/octet-stream"},  

            {".conf",   "text/plain"},  

            {".cpp",    "text/plain"},  

            {".doc",    "application/msword"},  

            {".docx",   "application/vnd.openxmlformats-officedocument.wordprocessingml.document"},  

            {".xls",    "application/vnd.ms-excel"},   

            {".xlsx",   "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"},  

            {".exe",    "application/octet-stream"},  

            {".gif",    "image/gif"},  

            {".gtar",   "application/x-gtar"},  

            {".gz", "application/x-gzip"},  

            {".h",  "text/plain"},  

            {".htm",    "text/html"},  

            {".html",   "text/html"},  

            {".jar",    "application/java-archive"},  

            {".java",   "text/plain"},  

            {".jpeg",   "image/jpeg"},  

            {".jpg",    "image/jpeg"},  

            {".js", "application/x-javascript"},  

            {".log",    "text/plain"},  

            {".m3u",    "audio/x-mpegurl"},  

            {".m4a",    "audio/mp4a-latm"},  

            {".m4b",    "audio/mp4a-latm"},  

            {".m4p",    "audio/mp4a-latm"},  

            {".m4u",    "video/vnd.mpegurl"},  

            {".m4v",    "video/x-m4v"},   

            {".mov",    "video/quicktime"},  

            {".mp2",    "audio/x-mpeg"},  

            {".mp3",    "audio/x-mpeg"},  

            {".mp4",    "video/mp4"},  

            {".mpc",    "application/vnd.mpohun.certificate"},        

            {".mpe",    "video/mpeg"},    

            {".mpeg",   "video/mpeg"},    

            {".mpg",    "video/mpeg"},    

            {".mpg4",   "video/mp4"},     

            {".mpga",   ""},  

            {".msg",    "application/vnd.ms-outlook"},  

            {".ogg",    "audio/ogg"},  

            {".pdf",    "application/pdf"},  

            {".png",    "image/png"},  

            {".pps",    "application/vnd.ms-powerpoint"},  

            {".ppt",    "application/vnd.ms-powerpoint"},  

            {".pptx",   "application/vnd.openxmlformats-officedocument.presentationml.presentation"},  

            {".prop",   "text/plain"},  

            {".rc", "text/plain"},  

            {".rmvb",   "audio/x-pn-realaudio"},  

            {".rtf",    "application/rtf"},  

            {".sh", "text/plain"},  

            {".tar",    "application/x-tar"},     

            {".tgz",    "application/x-compressed"},   

            {".txt",    "text/plain"},  

            {".wav",    "audio/x-wav"},  

            {".wma",    "audio/x-ms-wma"},  

            {".wmv",    "audio/x-ms-wmv"},  

            {".wps",    "application/vnd.ms-works"},  

            {".xml",    "text/plain"},  

            {".z",  "application/x-compress"},  

            {".zip",    "application/x-zip-compressed"},  

            {"",        "*/*"}    

        };