根据 Tamicer/JsWebView 修改定制
Android基于JsBridge封装的高效带加载进度的WebView
可用作简单应用内置浏览器，帮你快速开发Hybrid APP
主要功能：
Gradle:
root：
repositories {
maven { url "https://jitpack.io" }
jcenter()
}
Module:
dependencies {
.....
compile 'com.tamic:browse:1.0.0'
}
**XMl**
<com.rjs.mywebview.view.ProgressBarWebView
android:id="@+id/login_progress_webview"
style="@style/NumberProgressBar_Default"
android:layout_width="match_parent"
android:layout_height="match_parent" />
建议：代码中动态生成(防止重复打开导致的内容泄露)
“`java
mProgressBarWebView = new ProgressBarWebView(MainActivity.this);
root_layout.addView(mProgressBarWebView);
**初始化**
**XMl**
ProgressBarWebView mProgressBarWebView = (ProgressBarWebView) findViewById(R.id.login_progress_webview);
**设置WebViewClient**
mProgressBarWebView.setWebViewClient(new CustomWebViewClient(mProgressBarWebView.getWebView()) {
@Override
public String onPageError(String url) {
//指定网络加载失败时的错误页面
return "file:///android_asset/error.html";
}
@Override
public Map<String, String> onPageHeaders(String url) {
// 可以加入header
return null;
}
});
// 打开页面，也可以支持网络url
mProgressBarWebView.loadUrl("file:///android_asset/demo.html");
**回调js的方法**
// 添加hander方法名
mHandlers.add("login");
// 订阅此方法key
mProgressBarWebView.registerHandlers(mHandlers, new JsHandler() {
@Override
public void OnHandler(String handlerName, String responseData, CallBackFunction function) {
String resquestData = "this native data"
// 返回数据给js
function.onCallBack(resquestData);
}
});
**调用js**
mProgressBarWebView.callHandler("callNative", "hello H5, 我是java", new JavaCallHandler() {
@Override
public void OnHandler(String handlerName, String jsResponseData) {
Toast.makeText(MainActivity.this, "h5返回的数据：" + jsResponseData, Toast.LENGTH_SHORT).show();
}
});
**发送消息给js**
mProgressBarWebView.send("hello world!", new CallBackFunction() {
@Override
public void onCallBack(String data) {
// data 为js回传数据
Toast.makeText(MainActivity.this, data, Toast.LENGTH_SHORT).show();
}
});
**属性配置**
```java
webView.loadUrl("www.baidu.com");//WebView加载的网页使用loadUrl
WebSettings webSettings = webView.getSettings();//获得WebView的设置
webSettings.setUseWideViewPort(true);// 设置此属性，可任意比例缩放
webSettings.setLoadWithOverviewMode(true);//适配
webSettings.setJavaScriptEnabled(true); //支持js
webSettings.setCacheMode(WebSettings.LOAD_DEFAULT); //设置 缓存模式
webSettings.setDomStorageEnabled(true);// 开启 DOM storage API 功能
webSettings.setDatabaseEnabled(true);//开启 database storage API 功能
webSettings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);//HTTPS，注意这个是在LOLLIPOP以上才调用的
webSettings.setAppCacheEnabled(true);//开启 Application Caches 功能
webSettings.setBlockNetworkImage(true);//关闭加载网络图片，在一开始加载的时候可以设置为true，当加载完网页的时候再设置为false
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WebChromeClient和WebViewClient
webView.setWebChromeClient(new WebChromeClient() {
@Override
public void onProgressChanged(WebView view, int newProgress) {
//加载的进度
}
@Override
public void onReceivedTitle(WebView view, String title) {
//获取WebView的标题
}
@Override
public boolean onJsAlert(WebView view, String url, String message, final JsResult result) {
return super.onJsAlert(view, url, message, result);
//Js 弹框
}
@Override
public boolean onJsConfirm(WebView view, String url, String message, final JsResult result) {
AlertDialog.Builder b = new AlertDialog.Builder(IllegalQueryActivity.this);
b.setTitle("删除");
b.setMessage(message);
b.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
result.confirm();
}
});
b.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
result.cancel();
}
});
b.create().show();
return true;
}
});
webView.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
//需要设置在当前WebView中显示网页，才不会跳到默认的浏览器进行显示
return true;
}
@Override
public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
super.onReceivedError(view, request, error);
//加载出错了
}
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
//加载完成
}
});
webView.setDownloadListener(new DownLoadListener());//下载监听
private class DownLoadListener implements DownloadListener {
@Override
public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
}
}
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然后就是WebView跟JS的交互了
webView.addJavascriptInterface(new WebAppInterface(this), "WebJs");
public class WebAppInterface {
Context mContext;
public WebAppInterface(Context c) {
mContext = c;
}
@JavascriptInterface
public void method() {
}
}
webView.loadUrl("javascript:jsMethod()");//这是WebView最简单的调用JS的方法
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当activity执行生命周期的时候，这里需要注意的是在onDestroy的时候，需要销毁WebView，不然也会出现内存泄漏的
@Overrideprotected void onPause() {
super.onPause();
if (webView != null) {
webView.onPause();
}
}
@Override
protected void onResume() {
super.onResume();
if (webView != null) {
webView.onResume();
}
}
@Override
protected void onDestroy() {
if (webView != null) {
webView.clearCache(true); //清空缓存
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
if (webViewLayout != null) {
webViewLayout.removeView(webView);
}
webView.removeAllViews();
webView.destroy();
}else {
webView.removeAllViews();
webView.destroy();
if (webViewLayout != null) {
webViewLayout.removeView(webView);
}
}
webView = null;
}
}