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：

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"},{"","*/*"}};

这个MIME类型可能不够完整，你有要补充的吗？

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