安卓调用手机上的应用打开不同类型的文件

public interface FileNameMap {
/**
* Returns the MIME type (such as "text/plain") for the given filename, or null.
*/
public String getContentTypeFor(String filename);
}

/**
* Return the MIME type for the given extension.
* @param extension A file extension without the leading '.'
* @return The MIME type for the given extension or null iff there is none.
*/
public String getMimeTypeFromExtension(String extension) {
return MimeUtils.guessMimeTypeFromExtension(extension);
}

try {
FileNameMap fileNameMap = URLConnection.getFileNameMap();
String path = "/mnt/test/TB_DRAWING.xls";
File file = new File(path);
String type = fileNameMap.getContentTypeFor(path);
//                  解决部分三星手机无法获取到类型的问题
if (TextUtils.isEmpty(type)) {
String extension = MimeTypeMap.getFileExtensionFromUrl(path);
type = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
}
if(TextUtils.isEmpty(type)){
Toast.makeText(context, "无法正确读取文件类型，请尝试在文件夹中直接打开！", Toast.LENGTH_SHORT).show();
return;
}

Intent intent = new Intent(Intent.ACTION_VIEW);
intent.addCategory(Intent.CATEGORY_DEFAULT);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
Uri uri = Uri.fromFile(file);
intent.setDataAndType(uri, type);
startActivity(intent);
} catch (Exception e) {
Toast.makeText(context, "手机上未安装能打开该文件的程序！", Toast.LENGTH_SHORT).show();
}