一、背景

在uni-app开发过程中，有时候会遇到uni-app插件或者提供的api对硬件操作不太友好，需要使用原生Android开发对应模块，为了使得双方通信方便，特意封装了一个接口，可实现Android与Uni-app互相通讯。

二、内容

做完以下第一、第二部分，即可实现Android与uni-app 互相通信，当然双方通信有不同方式，具体情况具体分析，我的采用的方案是写Android原生插件,在uni-app中集成Android原生插件方式实现。

1、原生Android部分

Android原生涉及到的几个类，MyEvent.java（传递消息的ben类）,MyEventManager.java类作用（事件管理器用来处理事件与通知监听器），MyListener.java类，作用接口回调（监听器接口）。由于采用的是uni-app插件方式，故先去uni-app官网下载插件sdk进行开发。详情见最后的代码连接，以下只是例举用的类。

代码

public class MyEvent { //数据 private Object data; //事件来源 字符串 private String source; //触发对象 private Object trigger; private int state; public MyEvent() { } public MyEvent(Object data) { this.data = data; } public Object getTrigger() { return trigger; } public void setTrigger(Object trigger) { this.trigger = trigger; } public MyEvent(Object data, String source) { this.data = data; this.source = source; } public Object getData() { return data; } public void setData(Object data) { this.data = data; } public String getSource() { return source; } public void setSource(String source) { this.source = source; } public int getState() { return state; } public void setState(int state) { this.state = state; } @Override public String toString() { return "MyEvent{" + "data=" + data + ", source='" + source + ''' + ", trigger=" + trigger + ", state=" + state + '}'; }}

MyEventManager.java

public class MyEventManager { private static MyEventManager myEventManager; private Map> listeners; private MyEventManager() { this.listeners = new HashMap>(); } public int getSize() { int size = 0; for (String str : listeners.keySet()) { size = size + listeners.get(str).size(); } return size; } public Map> getListeners() { return listeners; } public static MyEventManager getMyEventManager() { if (myEventManager == null) { synchronized (MyEventManager.class) { if (myEventManager == null) { myEventManager = new MyEventManager(); } } } return myEventManager; } public MyListener addListener(MyListener listener, String source) { if (listener != null && source != null) { Collection myListeners = listeners.get(source); if (myListeners == null) { myListeners = new HashSet(); listeners.put(source, myListeners); } myListeners.add(listener); } return listener; } public MyListener addListener(String source, MyListener listener) { return addListener(listener, source); } public void removeListener(MyListener listener) { if (listeners == null || listener == null) { return; } //变量所有 找出相同的 删除 for (String str : listeners.keySet()) { Collection collection = listeners.get(str); Iterator iter = collection.iterator(); while (iter.hasNext()) { MyListener next = (MyListener) iter.next(); if (next == listener) { collection.remove(next); return; } } } } public static MyEvent postMsg(Object data, String source) { MyEventManager myEventManager = MyEventManager.getMyEventManager(); MyEvent myEvent = new MyEvent(data); myEvent.setSource(source); if (myEventManager.listeners == null) return myEvent; myEventManager.notifyListeners(myEvent, myEvent.getSource()); return myEvent; } private void notifyListeners(MyEvent event, String source) { //取出 key为source 的 监听器集合 Collection collection = listeners.get(source);// Log.i(MyEventManager.class.getName(), source + "--->" + event.getData()); if (collection == null) { return; } //遍历监听器集合 Iterator iter = collection.iterator(); while (iter.hasNext()) { MyListener next = iter.next(); //通知回调 next.onChange(event); } //销毁事件对象 event = null; }}

MyListener.java类

public interface MyListener extends EventListener { void onChange(MyEvent myEvent);}

BluetoothAndWifi.java类继承UniModule实现插件

public class BluetoothAndWifi extends UniModule { public static int REQUEST_CODE = 1000;//请求码 public static int REQUEST_BLUETOOTH_CODE = 1001;//请求码 @UniJSMethod(uiThread = false) public void sendMsgToUni() { MyEventManager.postMsg("==大宝==Android发送给==Uni-app====", "formAndroid"); } @UniJSMethod(uiThread = false) public void initAndroidEventListner() { Ted(); } @UniJSMethod(uiThread = true) public void Ted() { Toast.makeText(mWXSDKInstance.getContext(), "==初始化监听AndroidEventListner==", Toast.LENGTH_SHORT).show(); MyEventManager.getMyEventManager().addListener(new MyListener() { @Override public void onChange(MyEvent myEvent) { if (myEvent.getSource().trim().equals("fromUni-app") ) {//判断过滤 //从uniapp 或者原生传过来的数据 Object data = myEvent.getData(); Toast.makeText(mWXSDKInstance.getContext(), "==Uni传过来的数据====" + data, Toast.LENGTH_SHORT).show(); } } }, "fromUni-app"); } @UniJSMethod(uiThread = false) public void addMathNumber(int a, int b, UniJSCallback callback) { callback.invoke(a + b + 9); } @UniJSMethod(uiThread = false) public void showToast(String msg, UniJSCallback callback) { Toast.makeText(mWXSDKInstance.getContext(), msg, Toast.LENGTH_SHORT).show(); callback.invoke(msg); } @UniJSMethod(uiThread = false) public void aShowToastOK(String msg, UniJSCallback callback) { Toast.makeText(mWXSDKInstance.getContext(), msg, Toast.LENGTH_SHORT).show(); callback.invoke(msg); } @UniJSMethod(uiThread = false) public void gotoWifiPage() { if (mUniSDKInstance != null && mUniSDKInstance.getContext() instanceof Activity) { Intent intent = new Intent(mUniSDKInstance.getContext(), WiFiActivity.class); ((Activity) mUniSDKInstance.getContext()).startActivityForResult(intent, REQUEST_CODE); } } @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == REQUEST_CODE && data.hasExtra("respond")) {// Log.e("TestModule", "原生页面返回----"+data.getStringExtra("respond")); } else { super.onActivityResult(requestCode, resultCode, data); } }

怎么使用

Android原生部分 //发送消息 MyEventManager.postMsg("==大宝==Android发送给==Uni-app====", "formAndroid");//发消息 //初始化监听 MyEventManager.getMyEventManager().addListener(new MyListener() { @Override public void onChange(MyEvent myEvent) { if (myEvent.getSource().trim().equals("fromUni-app") ) {//判断过滤 //从uniapp 或者原生传过来的数据 Object data = myEvent.getData(); Toast.makeText(mWXSDKInstance.getContext(), "==Uni传过来的数据====" + data, Toast.LENGTH_SHORT).show(); } } }, "fromUni-app");//"fromUni-app" 标记 必须与发送消息的标记一样uni-app部分的代码//获取java类 let myEventManager = plus.android.importClass("com.xiaoya.mylibrary.business.msg.MyEventManager");let eventManager = myEventManager.getMyEventManager();let myListener = plus.android.implements("com.xiaoya.mylibrary.business.msg.MyListener", { onChange: function(event) { plus.android.importClass(event); console.log("==日志输出33333==" + event.getData()); if (event.getSource() == 'formAndroid') { andoridModule.showToast(event.getData()); } //导入类 //获取数据 // console.log); //获取来源 // console.log(event.getSource(); } }) // //添加监听器 eventManager.addListener("formAndroid", myListener);

msg部分

2、uni-app调用部分

a、代码

uni-app工程截图

3、最终效果

4、代码地址

代码还包含其他功能，例如uni-app调用

Android原生代码

https://download.csdn.net/download/shi450561200/87383612

uni-app代码

https://download.csdn.net/download/shi450561200/87383617

https://ask.dcloud.net.cn/article/id-36187