Android js_第2页-阿里云

Android:WebView与js交互方式

一、通过WebView的addJavascriptInterface（）进行对象映射 1、将JS代码javascript.html格式放到src/main/assets文件夹里 javascript.html<!DOCTYPE html> <html> &...

浅谈android和js的交互问题

现在很多app里面很多功能都用html5实现，也就是用webview加载html显示一些图文信息。这么做的好处就是减少开发成本，一套html在android ，ios及web都可以跑。节省了很多开发成本。但是这个也就带来相应的一些问题。最大问题就是交互问题。所以下面给大家说一下and...

开源Android容器化框架Atlas开发者指南

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React Native之Android原生通过DeviceEventEmitter发送消息给js

1 问题Android原生向js发消息,并且可以携带数据2 实现原理Android原生可以使用RCTEventEmitter来注册事件,然后这里需要指定事件的名字,然后在js那端进行监听同样事件的名字监听,就可以收到消息得到数据reactContext.getJSModule(DeviceEvent...

React Native之js同步调用安卓原生方法@ReactMethod(isBlockingSynchronousMethod = true)

1 问题之前的代码js调用安卓原生都是用的异步方法,比如callback, promiss,异步的话,我们一般是在安卓原生有耗时操作,才用异步,如果我要离开返回,就需要js调用安卓同步方法利用callback实现js调用原生可以参考我的这篇博客React Native实现js调用安卓原生代码Reac...

React Native之js调用Android原生使用Callback传递结果给js

1 问题上面的文章只是调用安卓原生显示Toast,但是我们一般会需要调用安卓的代码然后去拿回结果给js,但是我们知道在android层js调用的这个函数返回值必须的void,所以我们需要用到Callback,这里先说Callback1. @ReactMethod 2. public void met...

React Native实现js调用安卓原生代码

1 问题实现js调用安卓原始代码,直接上代码,简单粗暴2 代码实现 1) 实现一个继承ReactContextBaseJavaModule的类,MyToastModule.java文件如下public class MyToastModule exte...

根据js来判断手机是操作系安卓还是ios

平常开发很常见的功能，在移动端需要根据javaScript来判断手机是安卓还是ios进行应用市场跳转。通过js提供的Navigator 可以来判断手机是安卓还是ios系统，代码如下1.js判断是否为IOS设备function IsAppleStore() { va...

js之判断用户设备是网页(谷歌,UC,火狐)还是客户端(IOS还是Android)

var userAgent = window.navigator.userAgent export default { isFromAndroid: /android/gi.test(userAgent), /* 安卓*/ isFromIOs: /iphone|ipod|ios/gi.test(us...

html5 video在安卓手机微信上全屏播放的问题，video.js在安卓手机上无法全屏播放的问题

html5 video在安卓手机微信上全屏播放的问题，video.js在安卓手机上无法全屏播放的问题在video上写了webkit-playsinline这个属性，安卓现在也是不支持的，但苹果手机支持。 video.js 也调用全屏方法requestFullscreen()安卓手机无法全屏播放，I...

JS 如何判断是否安装某个 Android APP？

作者：UC 国际研发何惧在实际工作场景中，我们经常会遇到这种需求：需要提示用户下载 App，而如果用户已经安装，我们希望是直接打开 App。实际上，JS 是没有判断 App 是否安装的方法的，那么我们只能想办法来解决这个问题了。首先，我们需要有 call 起 App 的 schema 以及下...

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