文件管理器中打开录音文件修改为音乐播放器播放

在文件系统中播放录音文件（.3gp或者.ogg）时，默认是用video player播放，如何修改使其可以选择音乐播放器播放？

解决方法如下：

1. vendor/mediatek/proprietary/packages/apps/FileManager/src/com/mediatek/filemanager/service/FileManagerService.java

恢复FileManagerService.java中被注释掉的函数及其函数体

public String update3gppMimetype(FileInfo fileInfo) {
LogUtils.d(TAG, "update3gppMimetype...");
String mimeType = FileInfo.MIMETYPE_3GPP_VIDEO;
ContentResolver resolver = getContentResolver();
if (resolver != null && fileInfo != null) {
// fileInfo.setFileMimeType(FileInfo.MIMETYPE_3GPP_VIDEO);
final Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
final String[] projection = new String[] { MediaStore.MediaColumns.MIME_TYPE };
final String selection = MediaStore.MediaColumns.DATA + "=?";
final String[] selectionArgs = new String[] { fileInfo
.getFileAbsolutePath() };
Cursor cursor = null;
try {
cursor = resolver.query(uri, projection, selection,
selectionArgs, null);
LogUtils.d(TAG, "update3gppMimetype,file:" + fileInfo.getFileAbsolutePath());
if (cursor != null && cursor.moveToFirst()) {
mimeType = cursor.getString(cursor
.getColumnIndex(MediaStore.MediaColumns.MIME_TYPE));
LogUtils.d(TAG, "update3gppMimetype mimeType: " + mimeType);
} else {
mimeType = fileInfo.getFileOriginMimeType();
LogUtils.d(TAG, "update3gppMimetype, not find from media,origin mimeType: " + mimeType);
if (mimeType == null) {
mimeType = FileInfo.MIMETYPE_3GPP_VIDEO;
}
}
} finally {
if (cursor != null) {
cursor.close();
}
}
}

return mimeType;
}
2.vendor/mediatek/proprietary/packages/apps/FileManager/src/com/mediatek/filemanager/FileInfo.java

恢复其中的部分代码：

1.恢复被注释掉的代码///M:@#3gp#@{the follow code is to handle the 3gp file.not do special handle now
private static HashMap<String, String> sMimeType3GPPMap = new HashMap<String, String>();
///M:@{the top code is to handle the 3gp file.not do special handle now

2.恢复被注释掉的代码
public String getFileMimeType(FileManagerService service) {
LogUtils.d(TAG, "getFileMimeType,service.");
String mimeType = null;

if (!isDirectory()) {
if (!isDrmFile()) {
mimeType = getMimeType(mFile);
LogUtils.d(TAG, "getFileMimeType, mimetype is : " + mimeType);
} else {
mimeType = DrmManager.getInstance().getOriginalMimeType(mAbsolutePath);
LogUtils.d(TAG, "getFileMimeType, is drm file,mimetype is: " + mimeType);
}

///M:@#3gp#@{the follow code is to handle the 3gp file.not do special handle now
if (mimeType.equalsIgnoreCase(FileInfo.MIMETYPE_3GPP_UNKONW)) {
mimeType = service.update3gppMimetype(this);
}

if (mimeType.equalsIgnoreCase(FileInfo.MIMETYPE_3GPP_AUDIO)
|| mimeType.equalsIgnoreCase(FileInfo.MIMETYPE_3GPP_VIDEO)
|| mimeType.equalsIgnoreCase(FileInfo.MIMETYPE_3GPP2_VIDEO)) {
String name = null;
int sepIndex = mName.lastIndexOf("(");
if (sepIndex > 0) {
name = mName.substring(0, sepIndex);
} else {
name = mName.substring(0, mName.indexOf("."));
}
LogUtils.d(TAG, "getFileMimeType ,record the mimetype: " + mimeType + ",name = "
+ name + ",mName = " + mName);

sMimeType3GPPMap.put(name, mimeType);
}
///@the top code is to handle the 3gp file.not do special handle now}
}

return mimeType;
}

3.恢复被注释掉的代码
private String getMimeType(File file) {
String fileName = getFileName();
String extension = FileUtils.getFileExtension(fileName);
LogUtils.d(TAG, "getMimeType fileName=" + fileName + ",extension = " + extension);

if (extension == null) {
return FileInfo.MIMETYPE_EXTENSION_NULL;
}

String mimeType = MediaFile.getMimeTypeForFile(fileName);
LogUtils.d(TAG, "getMimeType mimeType =" + mimeType);
if (mimeType == null) {
return FileInfo.MIMETYPE_EXTENSION_UNKONW;
}
///M:#3gp#@{the follow code is to handle the 3gp file.not do special handle now
// sp ecial solution for checking 3gpp original mimetype
// 3gpp extension could be video/3gpp or audio/3gpp
if (mimeType.equalsIgnoreCase(FileInfo.MIMETYPE_3GPP_VIDEO)
|| mimeType.equalsIgnoreCase(FileInfo.MIMETYPE_3GPP2_VIDEO)) {
LogUtils.d(TAG, "getMimeType, a 3gpp or 3g2 file,mimeType=" + mimeType);
return FileInfo.MIMETYPE_3GPP_UNKONW;
}
///M:@{the top code is to handle the 3gp file.not do special handle now
return mimeType;
}

4.全部恢复
///M:@#3gp#{the follow code is to handle the 3gp file.not do special handle now
public String getFileOriginMimeType() {
String key = null;
LogUtils.d(TAG, "getFileOriginMimeType, mName =" + mName);
int sepIndex = mName.lastIndexOf("(");
if (sepIndex > 0) {
key = mName.substring(0, sepIndex);
} else {
key = mName.substring(0, mName.indexOf("."));
}
LogUtils.d(TAG, "getFileOriginMimeType,key is:" + key);
String orginalMimeType = sMimeType3GPPMap.get(key);
LogUtils.d(TAG, "getFileOriginMimeType, OrginalMimeType=" + orginalMimeType);
if (orginalMimeType != null) {
sMimeType3GPPMap.remove(key);
}
return orginalMimeType;

}
///M:@{the top code is to handle the 3gp file.not do special handle now

修改完这两支文件后可单编验证，希望对大家有所帮助。