Android中调用系统所装的软件打开文件

在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：

/** 
 * 打开文件 
 * @param file 
 */  
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*/Uri.fromFile(file), type);  
    //跳转  
    startActivity(intent);    
      
}  
  
/** 
 * 根据文件后缀名获得对应的MIME类型。 
 * @param file 
 */  
private String getMIMEType(File file) {  
      
    String type="*/*";  
    String fName = file.getName();  
    //获取后缀名前的分隔符"."在fName中的位置。  
    int dotIndex = fName.lastIndexOf(".");  
    if(dotIndex < 0){  
        return type;  
    }  
    /* 获取文件的后缀名 */  
    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.length;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：

<span style="white-space: pre;">    </span>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",   "audio/mpeg"},  
            {".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"},  
            {"",        "*/*"}    
        };