When mixed record it in front of a very important development java and js intermodulation method for data exchange.
This mixed-use development will need to control the webview
This is metaphysics, ha ha ha
This article can look https://www.jianshu.com/p/3d9a93c9fea2
The first to set about webview. WebSettings configured to manage the state WebView
public static Boolean WebViewSetting (the Activity Activity, the WebView Webview) {
Final the WebSettings WebSettings = webview.getSettings ();
webSettings.setDomStorageEnabled ( to true ); // main sentence
webSettings.setJavaScriptEnabled ( to true ); // enable JS
webSettings.setBlockNetworkImage ( false ); // solve the picture does not appear
webSettings.setSavePassword ( false );
webSettings.setDefaultTextEncodingName ( "UTF-8"); // set the encoding format
webSettings.getSettings () setBuiltInZoomControls ().;// set whether to support the scaling
webSettings.addJavascriptInterface (obj, str); // inject java object to a html page
webSettings.setUseWideViewPort ( to true ); // set this property, can be arbitrary scaling
webSettings.setLoadWithOverviewMode ( to true ); // page support zoom:
webSettings.setJavaScriptEnabled ( to true );
webSettings.setBuiltInZoomControls ( to true );
webUrl.requestFocusFromTouch (); // if user webView need to manually enter a user name, password, or other, you must set the webview support for gestures focus.
webSettings.setJavaScriptEnabled ( to true ); // support js
webSettings.setUseWideViewPort ( false ); // will adjust the picture size to fit webview
webSettings.setSupportZoom ( to true ); // support scaling webSettings.setLayoutAlgorithm (LayoutAlgorithm.SINGLE_COLUMN); // support content re-layout
webSettings.supportMultipleWindows (); / / multi-window
webSettings.setCacheMode (WebSettings.LOAD_CACHE_ELSE_NETWORK); // close webview cache
webSettings.setAllowFileAccess ( to true ); // set can access files
webSettings.setNeedInitialFocus ( to true ); // when webview webview call requestFocus to set the node
webSettings.setJavaScriptCanOpenWindowsAutomatically ( to true ); // support open a new window by JS
webSettings.setLoadWithOverviewMode ( to true ); // scaled to the size of the screen
webSettings.setLoadsImagesAutomatically ( to true ); // support Load images automatically
// allow JavaScript can automatically open windows JS settings allow pop
webSettings.setJavaScriptCanOpenWindowsAutomatically ( to true );
// set the cache
webSettings.setAppCacheEnabled ( false );
// set the cache mode, a total of four modes
// webSettings.setCacheMode (WebSettings.LOAD_CACHE_ELSE_NETWORK);
// set the cache path
webSettings.setAppCachePath ( "" );
// support scaling (to fit the current screen)
webSettings.setSupportZoom ( to true );
// will adjust the picture to the appropriate size
webSettings .setUseWideViewPort ( to true );
// support content re-layout, a total of four ways
// default is NARROW_COLUMNS
webSettings.setLayoutAlgorithm (WebSettings.LayoutAlgorithm.SINGLE_COLUMN);
// set the default font size
webSettings.setDefaultFontSize (12 );
// support zoom
webSettings.setSupportZoom ( to false );
// set two support means zoom gesture
webSettings.setBuiltInZoomControls ( to false );
return to true ;
}
The following important here
addJavascriptInterface native WebKit the API is, belongs to the public methods WebView object, for exposing a java object to js, js such methods can be called directly.
Because it is not secure, after 4.2 added @JavascriptInterface comment
There is a framework: https: //github.com/lzyzsd/JsBridge --- This project between Java and JavaScript bridge the gap.
Now to begin loading the page a webview.loadUrl ( "https://www.baidu.com/");
@SuppressLint("JavascriptInterface")
private void initMixedPage() {
//封装webview
NativeWebViewUtil nativeWebViewUtil = new NativeWebViewUtil();
nativeWebViewUtil.WebViewSetting(this,webview);
//添加Javascript的映射
webview.addJavascriptInterface(this,"android");
webview.loadUrl("https://www.baidu.com");
webview.setWebViewClient(new WebViewClient(){
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
// 加载页面
}
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
// 加载结束
webview.evaluateJavascript("javascript:get_android_base("aaa")", new ValueCallback<String>() {
@Override
public void onReceiveValue(String value) {
//此处为 js 返回的结果
Log.v("Native",value);
}
});
}
});
}
没有回掉可以写null.
第一、Android调用js
有两个很重要的方法setWebChromeClient和setWebClient
setWebChromeClient主要处理解析，渲染网页等浏览器做的事情
WebChromeClient是辅助WebView处理Javascript的对话框等
要调用js就要等webview加载完成后再调用js方法
webview.setWebViewClient(new WebViewClient(){
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
// 加载页面
}
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
// 加载结束js 方法 get_android_base
webview.evaluateJavascript("javascript:get_android_base("aaa")", new ValueCallback<String>() {
@Override
public void onReceiveValue(String value) {
//此处为 js 返回的结果
Log.v("Native",value);
}
});
}
});
javascript代码
接收android发来的数据
function get_android_base(base){
alert(base);
}
第二、js调用Android
javascrip代码
js的一个方法 get_data()
window.android.get_data("mcontrol");
Android代码
@JavascriptInterface
public void get_data(String base){
Log.d(TAG,base);
}
到这里，简单的互调就完成了。
互调就很玄学，总是有各种各样的问题哈哈哈。
后面再记录下腾讯的webview