MMs 到 MediaModel . 彩信的各种mediaModel

彩信的媒体大概是这样： 
WorkingMessage里有个SlideshowModel 
SlideshowModel里一队列SlideModel 
SlideModel 是一个队列的MediaModel 
MediaModel，可以衍生出AudioModel，RegionMediaModel。 
RegionMediaModel包含TextModel，ImageModel，VideoModel这三个分类。 

创建MediaModel的构造函数 

public MediaModel(Context context, String tag, String contentType,   
        String src, Uri uri) throws MmsException {   
    mContext = context;   
    mTag = tag;   
    mContentType = contentType;   
    mSrc = src;   
    mUri = uri;   
    initMediaSize();   
    mMediaActions = new ArrayList<MediaAction>();   
}   
  
  
public MediaModel(Context context, String tag, String contentType,   
        String src, byte[] data) {   
    if (data == null) {   
        throw new IllegalArgumentException("data may not be null.");   
    }   
  
    mContext = context;   
    mTag = tag;   
    mContentType = contentType;   
    mSrc = src;   
    mData = data;   
    mSize = data.length;   
    mMediaActions = new ArrayList<MediaAction>();   
}   
  
  
public MediaModel(Context context, String tag, String contentType,   
        String src, DrmWrapper wrapper) throws IOException {   
    mContext = context;   
    mTag = tag;   
    mContentType = contentType;   
    mSrc = src;   
    mDrmObjectWrapper = wrapper;   
    mUri = DrmUtils.insert(context, wrapper);   
    mSize = wrapper.getOriginalData().length;   
    mMediaActions = new ArrayList<MediaAction>();   
}

mediaModel里面比较重要的的几个成员： 

protected String mTag;   
protected String mSrc;   
protected String mContentType;   
private Uri mUri;   
private byte[] mData;   
protected int mSize;

mSrc 文件名 
mContentType在frameworks/base/core/java/com/google/android/mms/ContentType里定义，比如 
public static final String TEXT_PLAIN        = "text/plain"; 
    public static final String TEXT_HTML         = "text/html"; 
public static final String IMAGE_JPEG        = "image/jpeg"; 
    public static final String IMAGE_JPMMs. uri 到 MediaModel . 彩信的各种mediaModelG         = "image/jpg"; 
public static final String VIDEO_UNSPECIFIED = "video/*"; 
    public static final String VIDEO_3GPP        = "video/3gpp"; 
等 
uri不说了。 
data 是byte[] 的数据 
size是文件长度。 
。 

彩信的单个附件的uri， 
从onActivityResult得到。 


像拍照片的uri来的最容易，是Uri uri = Uri.fromFile(file);