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<String, Collection> listeners;
private MyEventManager() {
this.listeners = new HashMap<String, Collection>();
}
public int getSize() {
int size = 0;
for (String str : listeners.keySet()) {
size = size + listeners.get(str).size();
}
return size;
}
public Map<String, Collection> 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
.content {
padding-top: 200rpx;
}
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
