使用 QuickBlox 聊天 SDK 发送图像 - Android
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【中文标题】使用 QuickBlox 聊天 SDK 发送图像 - Android【英文标题】：Send Image Using QuickBlox Chat SDK - Android 【发布时间】：2016-01-04 13:27:40 【问题描述】：我正在开发一个聊天应用程序。为此，我使用 Quickblox SDk 。到目前为止，我已经完成了文字聊天。现在我正在尝试在聊天中发送图像。为此，首先我从 SD 卡中选择图像，然后在图像选择时成功上传到 quickblox 服务器，然后使用 QBFile 引用我获取图像 ID 并尝试在聊天窗口中显示它。
这是参考代码。
private void sendChatMessage(String messageText, InputStream imageStream)
final QBChatMessage chatMessage = new QBChatMessage();
//Send Image
if(imageStream != null)
File file = FileHelper.getFileInputStream(imageStream, "sample_file.png", "myFile");
Boolean fileIsPublic = true;
QBContent.uploadFileTask(file, fileIsPublic, messageText, new QBEntityCallbackImpl<QBFile>()
@Override
public void onSuccess(QBFile qbFile, Bundle params)
String publicUrl = qbFile.getPublicUrl();
Toast.makeText(getApplicationContext(), "Image uploaded success", Toast.LENGTH_SHORT).show();
id = qbFile.getId();
Toast.makeText(getApplicationContext(),"Public URl: "+ publicUrl, Toast.LENGTH_SHORT).show();
Toast.makeText(getApplicationContext(),"ID: "+ id + "", Toast.LENGTH_SHORT).show();
//
QBAttachment attach = new QBAttachment("image");
attach.setId(id + "");
ArrayList<QBAttachment> arryattach = new ArrayList<QBAttachment>();
arryattach.add(attach);
chatMessage.setProperty(PROPERTY_SAVE_TO_HISTORY, "1");
chatMessage.setDateSent(new Date().getTime() / 1000);
chatMessage.setBody("");
chatMessage.setAttachments(arryattach);
//chatMessage.setId(id+"");
try
chat.sendMessage(chatMessage);
catch (XMPPException e)
Log.e(TAG, "failed to send a message", e);
catch (SmackException sme)
Log.e(TAG, "failed to send a message", sme);
if (dialog.getType() == QBDialogType.PRIVATE)
showMessage(chatMessage);
@Override
public void onError(List<String> errors)
System.out.println("==========image uploaded Errors++++++++" + errors.toString());
, new QBProgressCallback()
@Override
public void onProgressUpdate(int progress)
);
else
//Send Text Body.
chatMessage.setBody(messageText);
chatMessage.setProperty(PROPERTY_SAVE_TO_HISTORY, "1");
chatMessage.setDateSent(new Date().getTime() / 1000);
try
chat.sendMessage(chatMessage);
catch (XMPPException e)
Log.e(TAG, "failed to send a message", e);
catch (SmackException sme)
Log.e(TAG, "failed to send a message", sme);
messageEditText.setText("");
if (dialog.getType() == QBDialogType.PRIVATE)
showMessage(chatMessage);
getView()
@Override
public View getView(int position, View convertView, ViewGroup parent)
final ViewHolder holder;
QBChatMessage chatMessage = getItem(position);
LayoutInflater vi = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
int type = getItemViewType(position) ;
if (convertView == null)
if (type == ChatItemType.Sticker.ordinal())
convertView = vi.inflate(R.layout.list_item_sticker, parent, false);
else if (type == ChatItemType.Message.ordinal())
convertView = vi.inflate(R.layout.list_item_message, parent, false);
else
convertView = vi.inflate(R.layout.list_item_image, parent, false);
holder = createViewHolder(convertView);
convertView.setTag(holder);
else
holder = (ViewHolder) convertView.getTag();
QBUser currentUser = ChatService.getInstance().getCurrentUser();
boolean isOutgoing = chatMessage.getSenderId() == null || chatMessage.getSenderId().equals(currentUser.getId());
setAlignment(holder, isOutgoing);
Collection<QBAttachment> attachments = chatMessage.getAttachments();
//attachments.
if ( attachments != null && attachments.size() > 0)
String imageid="" ;
for(QBAttachment attachment :attachments)
imageid = attachment.getId();
new BackgroundOperation(holder ,imageid).execute();
else if (StickersManager.isSticker(chatMessage.getBody()))
StickersManager.with(convertView.getContext())
.loadSticker(chatMessage.getBody())
.setPlaceholderColorFilterRes(android.R.color.darker_gray)
.into(holder.stickerView);
else if (holder.txtMessage != null)
holder.txtMessage.setText(chatMessage.getBody());
if (chatMessage.getSenderId() != null)
holder.txtInfo.setText(chatMessage.getSenderId() + ": " + getTimeText(chatMessage));
else
holder.txtInfo.setText(getTimeText(chatMessage));
return convertView;
class BackgroundOperation extends AsyncTask<InputStream , Void , InputStream>
ViewHolder holder ;
int imageid ;
InputStream inputStream;
BackgroundOperation(ViewHolder holder , String imageid)
this.holder = holder ;
this.imageid = Integer.parseInt(imageid);
@Override
protected void onPreExecute()
super.onPreExecute();
@Override
protected InputStream doInBackground(InputStream... params)
Handler mHandler = new Handler(Looper.getMainLooper());
mHandler.post(new Runnable()
public void run()
QBContent.downloadFileTask(imageid, new QBEntityCallbackImpl<InputStream>()
@Override
public void onSuccess(InputStream inputS, Bundle params)
inputStream = inputS ;
//ImageView img = holder.image_attachment ; //.setImageDrawable(d);
//Toast.makeText(context, "Image download Sucess", Toast.LENGTH_SHORT).show();
@Override
public void onError(List<String> errors)
Log.d("Image Download Error : ", errors.toString());
//Toast.makeText(context, "Image Download Error ", Toast.LENGTH_SHORT).show();
, new QBProgressCallback()
@Override
public void onProgressUpdate(int progress)
//Toast.makeText(context, "Image Download Progress ", Toast.LENGTH_SHORT).show();
);
);
return inputStream;
@Override
protected void onPostExecute(InputStream s)
super.onPostExecute(s);
if(s != null)
Log.d("InputStream Value :", "******"+s.toString()+"******************");
Bitmap bmp = BitmapFactory.decodeStream(s);
Drawable d = new BitmapDrawable(context.getResources(), bmp);
if(holder.image_attachment != null)
holder.image_attachment.setImageDrawable(d);
这里我在 getView() 中调用 new BackgroundOperation(holder ,imageid).execute();，这里我传递当前持有者和 imageid 以从 quickblox 服务器下载图像。这里发生了什么，当 new BackgroundOperation(holder ,imageid).execute() 运行（图像上传后），然后 doInBackground() 的返回语句不执行，即使图像正在下载，我在 QBContent.downloadFileTask() 的 onSuccess() 中得到相应的 InputStream 。这里我很困惑为什么 doInBackground() 没有返回。
【问题讨论】：
@andriod 开发者。我正在尝试为我的学校项目实现与您相同的聊天 api，我也想知道如何发送附件。我尝试在他们的网站上关注 quickblox 的 tut，但这并不是很有帮助。你能帮帮我吗？ 【参考方案1】：试试这个代码：
在 sendChatMessage 内
替换
id = qbFile.getId();
有
id = qbFile.getUid();
ChatAdapter.java 的 getView() 内部
替换
new BackgroundOperation(holder ,imageid).execute();
有
String url =prefixofimagePublicurl +imageid ;
Picasso.with(context).load(url).into(imageView);
从 ChatAdapter.java 中移除 BackgroundOperation。
注意：改变imageid int ot String的数据类型
【讨论】：
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