/*** 根據文件類型打開 ****/
public static void openFile(Context context, File file) {
// 跳转
try {
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);
context.startActivity(intent);
} catch (Exception e) {
Toast.makeText(context, "找不到打开此文件的应用!", Toast.LENGTH_SHORT).show();
}
}
/*** 根据文件后缀回去MIME类型 ****/
private static String getMIMEType(File file) {
try {
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;
} catch (Exception e) {
return null;
}
}
private static 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" }, { "", "*/*" } };
}