首先，我们先定义一个自定义消息的类型
public interface CustomAttachmentType { // 多端统一 int Guess = 1; int SnapChat = 2; int Sticker = 3; int RTS = 4; int SHARE = 5;//自定义 } 第二步，我们先定义一个自定义消息附件的基类，负责解析你的自定义消息的公用字段，比如类型等 注意: 实现 MsgAttachment 接口的成员都要实现 Serializable。（这个类demo里面有的，猜拳用的）
public abstract class CustomAttachment implements MsgAttachment { protected int type; CustomAttachment(int type) { this.type = type; } public void fromJson(JSONObject data) { if (data != null) { parseData(data); } } @Override public String toJson(boolean send) { return CustomAttachParser.packData(type, packData()); } public int getType() { return type; } protected abstract void parseData(JSONObject data); protected abstract JSONObject packData();}
第三步，继承这个基类，实现“分享”的附件类型。注意，成员变量都要实现 Serializable
public class fghGuessAttachment extends CustomAttachment { private String url = "http://img0.imgtn.bdimg.com/it/u=1737766921,271555379&fm=21&gp=0.jpg";//这个图片没使用，在布局里面放张默认图片 private String content = "内容xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"; private String title="标题xxxx"; protected int type; public fghGuessAttachment() { super(CustomAttachmentType.SHARE); } public fghGuessAttachment(String str) { this(); } @Override protected void parseData(JSONObject data) { title=data.getString("title"); content=data.getString("content"); url=data.getString("url"); } @Override public JSONObject packData() { JSONObject data = new JSONObject(); data.put("title",title); data.put("content",content); data.put("url",url); return data; } public String getUrl() { return url; } public void setUrl(String url) { this.url = url; } public String getContent() { return content; } public void setContent(String content) { this.content = content; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } } 第四步，实现自定义消息的附件解析器。 public class CustomAttachParser implements MsgAttachmentParser {//类里面 case CustomAttachmentType.SHARE: attachment = new fghGuessAttachment(); break;
第五步，将自定义消息展示UI上
viewholder包名下
/** * UIKit自定义消息界面用法展示类 */ public class fghSessionHelper extends MsgViewHolderBase{ private fghGuessAttachment attachment; private ImageView image; private TextView tvTitle; private TextView tvContent; @Override protected int getContentResId() { return R.layout.aaaaaaaa; } @Override protected void inflateContentView() { image = (ImageView) findViewById(R.id.image); tvTitle = (TextView) findViewById(R.id.tv_title); tvContent = (TextView) findViewById(R.id.tv_content); } @Override protected void bindContentView() { attachment = (fghGuessAttachment)message.getAttachment(); tvTitle.setText(attachment.getTitle()); tvContent.setText(attachment.getContent()); } //若是要自己修改气泡背景 // 当是发送出去的消息时，内容区域背景的drawable id @Override protected int rightBackground() { return com.netease.nim.uikit.R.drawable.nim_message_item_right_selector2; } }
第六步，发送自定义消息
public class fghGuessAction extends BaseAction { public fghGuessAction() { super(R.drawable.message_plus_guess_selector, R.string.input_panel_share); } @Override public void onClick() { fghGuessAttachment attachment = new fghGuessAttachment(); IMMessage message; if (getContainer() != null && getContainer().sessionType == SessionTypeEnum.ChatRoom) { message = ChatRoomMessageBuilder.createChatRoomCustomMessage(getAccount(), attachment); } else { message = MessageBuilder.createCustomMessage(getAccount(), getSessionType(), attachment); } sendMessage(message); } }
第七步，将该附件解析器注册到 SDK 中。为了保证生成历史消息时能够正确解析自定义附件，注册一般应放在 Application 的 onCreate 中完成
NIMClient.getService(MsgService.class).registerCustomAttachmentParser(new CustomAttachParser()); // 监听的注册，必须在主进程中。
第八步，注册扩展消息类型的显示ViewHolder，由于这里使用我们UIKIT，所以也需要注册到Application的onCreate中
public class SessionHelper {//这个类里面 //fgh NimUIKit.registerMsgItemViewHolder(fghGuessAttachment.class,fghSessionHelper.class);
第九步，在加号里面增加一个选项 ，Demo是在SessionHelper.java里面，定制的单聊界面。
/** * UIKit自定义消息界面用法展示类 */ public class SessionHelper { // 定制加号点开后可以包含的操作， 默认已经有图片，视频等消息了 ArrayListactions = new ArrayList<>(); actions.add(new fghGuessAction());