Android中調用系統所裝的軟件打開文件

<p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(54, 46, 43); font-size: 14px; font-family: Helvetica, Tahoma, Arial, sans-serif; line-height: 25.200000762939453px; ">應用中如何調用系統所裝的軟件打開一個文件，這是我們經常碰到的問題，下面是我所用到的一種方法，和大家一起分享一下！</p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(54, 46, 43); font-size: 14px; font-family: Helvetica, Tahoma, Arial, sans-serif; line-height: 25.200000762939453px; ">這個是打開文件的一個方法：</p>

	/**
	 * 打開文件
	 * @param file
	 */
	private void openFile(File file){
		
		Intent intent = new Intent();
		intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
		//設置intent的Action屬性
		intent.setAction(Intent.ACTION_VIEW);
		//獲取文件file的MIME類型
		String type = getMIMEType(file);
		//設置intent的data和Type屬性。
		intent.setDataAndType(/*uri*/Uri.fromFile(file), type);
		//跳轉
		startActivity(intent);	
		
	}

	/**
	 * 根據文件後綴名獲得對應的MIME類型。
	 * @param file
	 */
	private String getMIMEType(File file) {
		
		String type="*/*";
		String fName = file.getName();
		//獲取後綴名前的分隔符"."在fName中的位置。
		int dotIndex = fName.lastIndexOf(".");
		if(dotIndex < 0){
			return type;
		}
		/* 獲取文件的後綴名 */
		String end=fName.substring(dotIndex,fName.length()).toLowerCase();
		if(end=="")return type;
		//在MIME和文件類型的匹配表中找到對應的MIME類型。
		for(int i=0;i<MIME_MapTable.length;i++){ //MIME_MapTable??在這裏你一定有疑問，這個MIME_MapTable是什麼？
			if(end.equals(MIME_MapTable[i][0]))
				type = MIME_MapTable[i][1];
		}		
		return type;
	}

MIME_MapTable是所有文件的後綴名所對應的MIME類型的一個String數組：

<span style="white-space: pre;">	</span>private final String[][] MIME_MapTable={
			//{後綴名，	MIME類型}
			{".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"},
			{"",		"*/*"}	
		};