Android JsBridge 就是用来在 Android app的原生 java 代码与 javascript 代码中架设通信（调用）桥梁的辅助工具。
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allprojects {
repositories {
...
maven { url 'https://jitpack.io' }
}
}dependencies {
...
compile 'com.github.xesam:JsBridge:0.1'
}请在对应的 html 页面中引入
<script src="js-bridge.js"></script>js-bridge.js 地址参见:https://github.com/xesam/JsBridge/blob/master/js-bridge/src/main/assets/js-bridge.js
初始化 JsBridge:
jsBridge = new JsBridge(vWebView);加入 url 监控：
vWebView.setWebViewClient(new WebViewClient() {
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
Log.e("onPageFinished", url);
jsBridge.monitor(url);
}
});Java 注册处理方法：
jsBridge.register(new SimpleServerHandler("showPackageName") {
@Override
public void handle(String param, ServerCallback serverCallback) {
new Handler(Looper.getMainLooper()).post(new Runnable() {
@Override
public void run() {
String packageName = getPackageName();
Tip.showTip(getApplicationContext(), "showPackageName:" + packageName);
}
});
}
});Java 在处理方法中回调 Javascript：
@Override
public void handle(final String param, final ServerCallback serverCallback) {
new Handler(Looper.getMainLooper()).post(new Runnable() {
@Override
public void run() {
User user = getUser();
Map<String, String> map = new Gson().fromJson(param, Map.class);
String prefix = map.get("name_prefix");
Tip.showTip(mContext, "user.getName():" + prefix + "/" + user.getName());
if ("standard_error".equals(prefix)) {
Map<String, String> map1 = new HashMap<>();
map1.put("msg", "get user failed");
String userMarshalling = new Gson().toJson(map1);
serverCallback.invoke("fail", new MarshallableObject(userMarshalling));
} else {
String userMarshalling = new Gson().toJson(user);
serverCallback.invoke("success", new MarshallableObject(userMarshalling));
}
}
});
}Java 执行 Js 函数：
jsBridge.invoke("jsFn4", new MarshallableString("yellow"), new ClientCallback<String>() {
@Override
public void onReceiveResult(String invokeName, final String invokeParam) {
if ("success".equals(invokeName)) {
new Handler(Looper.getMainLooper()).post(new Runnable() {
@Override
public void run() {
Tip.showTip(getApplicationContext(), invokeParam);
}
});
}
}
@Override
public String getResult(String param) {
return param;
}
});销毁 JsBridge
@Override
protected void onDestroy() {
super.onDestroy();
jsBridge.destroy();
}Javascript 的灵活性比较高，所以要简单一些：
Javascript 注册处理函数：
window.JavaBridge.serverRegister('jsFn4', function (transactInfo, color) {
log("jsFn4:" + color);
title.style.background = color;
log("jsFn4:callback");
transactInfo.triggerCallback('success', 'background change to ' + color);
});Javascript 执行 Java 方法：
var sdk = {
getUser: function (params) {
var _invokeName = 'getUser';
var _invokeParam = params;
var _clientCallback = params;
window.JavaBridge.invoke(_invokeName, _invokeParam, _clientCallback);
}
};
sdk.getUser({
"name_prefix": "standard_error",
"success": function (user) {
log('sdk.getUser,success:' + user.name);
},
"fail": function (error) {
log('sdk.getUser,fail:' + error.msg);
}
})详细 Demo 请参见 js-bridge-demo 工程