解决：信息中插入avi格式的视频时，提示“unsupported video format”

【测试步骤】：新建信息，添加AVI格式的视频

【测试结果】：添加时弹出提示“unsupported video format”

该问题主要提现在手机彩信视频附件不支持该AVI格式的视频，因此我们通过操作流程对代码进行追踪，查找“unsupported video format”产生的位置。

我们从添加附件界面ComposeMessageActivity类的onActivityResult（）方法开始。

--》onActivityResult（）调用代码如下：

case REQUEST_CODE_ATTACH_VIDEO:

                if (data != null) {

                    mAttachFileUri = data.getData();

                    addVideoAsync(mAttachFileUri, false);

                }

                break;

--》addVideo（）--》setAttachment（）<WorkingMessage.java> 调用代码如下：

result = append ? appendMedia(type, dataUri, slideShowEditor)

                : changeMedia(type, dataUri, slideShowEditor);

--》changeMedia（）--》internalChangeMedia（）--》changeVideo（）<SlideshowEditor.java>

--》new VideoModel（）<TAG 1-1>

public VideoModel(Context context, Uri uri, RegionModel region)

            throws MmsException {

        this(context, null, null, uri, region);

        initModelFromUri(uri);

        checkContentRestriction();

    }

--》initModelFromUri（）<VideoModel.java> 调用代码如下：

private void initModelFromUri(Uri uri) throws MmsException {

        String scheme = uri.getScheme();

        if (scheme.equals("content")) {

            initFromContentUri(uri);

        } else if (uri.getScheme().equals("file")) {

            initFromFile(uri);

        }

        initMediaDuration();

    }

上述代码通过添加Log进行输出，这里的scheme的值为“file”；

--》initFromFile（）

private void initFromFile(Uri uri) throws MmsException {

        String path = uri.getPath();

        mSrc = path.substring(path.lastIndexOf('/') + 1);

        MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();

        String extension = MimeTypeMap.getFileExtensionFromUrl(mSrc);

        if (TextUtils.isEmpty(extension)) {

            // getMimeTypeFromExtension() doesn't handle spaces in filenames nor can it handle

            // urlEncoded strings. Let's try one last time at finding the extension.

            int dotPos = mSrc.lastIndexOf('.');

            if (0 <= dotPos) {

                extension = mSrc.substring(dotPos + 1);

            }

        }

        mContentType = mimeTypeMap.getMimeTypeFromExtension(extension.toLowerCase());

        // It's ok if mContentType is null. Eventually we'll show a toast telling the

        // user the video couldn't be attached.

        if (TextUtils.isEmpty(mContentType)) {

            throw new MmsException("Type of media is unknown.");

        }



        if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) {

            Log.v(TAG, "New VideoModel initFromFile created:"

                    + " mSrc=" + mSrc

                    + " mContentType=" + mContentType

                    + " mUri=" + uri);

        }

    }

上述代码中对mContentType进行赋值,这里我们通过Log输出，mContentType的值为“video/x-msvideo”；

接下来接着进行构造函数<TAG1-1>中的方法checkContentRestriction()；

protected void checkContentRestriction() throws ContentRestrictionException {

        ContentRestriction cr = ContentRestrictionFactory.getContentRestriction();

        cr.checkVideoContentType(mContentType);

    }



--》checkVideoContentType（）<CarrierContentRestriction.java>

public void checkAudioContentType(String contentType)

            throws ContentRestrictionException {

        if (null == contentType) {

            throw new ContentRestrictionException("Null content type to be check");

        }



        if (!sSupportedAudioTypes.contains(contentType)) {

            throw new UnsupportContentTypeException("Unsupported audio content type : "

                    + contentType);

        }

    }

上述代码中加粗标识的代码就是测试描述的问题，我们接着分析本类中静态语句快中的代码；

sSupportedVideoTypes = ContentType.getVideoTypes();

最终我们最终到ContentType.java类，并且发现该类中没有添加对该视频格式的支持。因此添加以下代码进行支持。

......

public static final String VIDEO_UNSPECIFIED = "video/*";

    public static final String VIDEO_3GPP        = "video/3gpp";

    public static final String VIDEO_3G2         = "video/3gpp2";

    public static final String VIDEO_H263        = "video/h263";

    public static final String VIDEO_MP4         = "video/mp4";

    public static final String VIDEO_X_MSVIDEO         = "video/x-msvideo";

......

// add supported video types

   sSupportedVideoTypes.add(VIDEO_X_MSVIDEO);

   sSupportedVideoTypes.add(VIDEO_3GPP);

   sSupportedVideoTypes.add(VIDEO_3G2);

   sSupportedVideoTypes.add(VIDEO_H263);

   sSupportedVideoTypes.add(VIDEO_MP4);

......

OK！