package com.hhzt.iptv.adservice; import .Activity; import android.graphics.Bitmap; import android.os.Build; import android.os.Bundle; import android.util.Log; import android.view.KeyEvent; import android.view.ViewGroup; import android.webkit.ConsoleMessage; import android.webkit.ValueCallback; import android.webkit.WebChromeClient; import android.webkit.WebResourceError; import android.webkit.WebResourceRequest; import android.webkit.WebSettings; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.TextView; /** * Created by Administrator on 2019-04-16. */ public class AdActivity extends Activity { private WebView mWebView; private WebSettings mWebSetting; TextView beginLoading,endLoading,loading,mtitle; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(); mWebView = (WebView)findViewById(.webView1); beginLoading = (TextView) findViewById(.text_beginLoading); endLoading = (TextView) findViewById(.text_endLoading); loading = (TextView) findViewById(.text_Loading); mtitle = (TextView) findViewById(.title); mWebSetting = mWebView.getSettings(); mWebSetting.setJavaScriptEnabled(true); /** * 传一个Android对象给JS,JS拿到对象以后就可以调用你传递的对象里面的方法 */ mWebView.addJavascriptInterface(new MyWeb(),"test");//AndroidtoJS类对象映射到js的test对象 mWebView.loadUrl("file:///android_asset/index.html"); /** * （2）　WebViewClient类（主要作用是：处理各种通知 & 请求事件） */ mWebView.setWebViewClient(new WebViewClient(){ @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { //使得打开网页时不调用系统浏览器， 而是在本WebView中显示 view.loadUrl(url); return super.shouldOverrideUrlLoading(view, url); } @Override public void onPageStarted(WebView view, String url, Bitmap favicon) { //设定加载开始的操作 // super.onPageStarted(view, url, favicon); System.out.println("开始加载了"); beginLoading.setText("开始加载了"); } @Override public void onPageFinished(WebView view, String url) { //设定加载结束的操作 // super.onPageFinished(view, url); endLoading.setText("结束加载了"); // Android版本变量 final int version = Build.VERSION.SDK_INT; /** * 因为该方法在 Android 4.4 版本才可使用，所以使用时需进行版本判断 * android 调用JS代码。需要在webview也没加载完成时调用，否则无效 */ if (version < 18) { mWebView.loadUrl("javascript:callAndroid()"); } else { mWebView.evaluateJavascript("javascript:callAndroid()", new ValueCallback<String>() { @Override public void onReceiveValue(String value) { //此处为 js 返回的结果 Log.i("TAG","onReceiveValue:"+value); } }); } } @Override public void onLoadResource(WebView view, String url) { //设定加载资源的操作 super.onLoadResource(view, url); } @Override public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) { } @Override public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) { //该方法传回了错误码，根据错误类型可以进行不同的错误分类处理 Log.i("TAG","onReceivedError:"+errorCode); super.onReceivedError(view, errorCode, description, failingUrl); } }); /** * （3）　WebChromeClient类( 作用：辅助 WebView 处理 Javascript 的对话框,网站图标,网站标题等等。) */ mWebView.setWebChromeClient(new WebChromeClient(){ @Override public void onProgressChanged(WebView view, int newProgress) { Log.i("TAG","onProgressChanged:"+newProgress); if (newProgress < 100) { String progress = newProgress + "%"; loading.setText(progress); } else if (newProgress == 100) { String progress = newProgress + "%"; loading.setText(progress); } } //获取网站标题 @Override public void onReceivedTitle(WebView view, String title) { // super.onReceivedTitle(view, title); System.out.println("标题在这里"); mtitle.setText(title); } //获取网站logo @Override public void onReceivedIcon(WebView view, Bitmap icon) { super.onReceivedIcon(view, icon); } @Override public boolean onConsoleMessage(ConsoleMessage consoleMessage) { Log.i("TAG","onConsoleMessage:"+consoleMessage.message()+ "-- from line "+consoleMessage.lineNumber()+" of "+consoleMessage.sourceId()); //这个方法返回Webview加载JS时的日志信息 return super.onConsoleMessage(consoleMessage); } }); } @Override protected void onResume() { super.onResume(); } //销毁Webview @Override protected void onDestroy() { if (mWebView != null) { // mWebView.loadDataWithBaseURL(null, "", "text/html", "utf-8", null); mWebView.clearHistory(); ((ViewGroup) mWebView.getParent()).removeView(mWebView); mWebView.destroy(); mWebView = null; } super.onDestroy(); } //点击返回上一页面而不是退出浏览器 @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK && mWebView.canGoBack()) { mWebView.goBack(); return true; } return super.onKeyDown(keyCode, event); } } index.hdml界面<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Carson</title> </head> <body> //点击按钮则调用callAndroid函数 <button onclick="callAndroid()"></button> </body> <script> function callAndroid(){ // 由于对象映射，所以调用test对象等于调用Android映射的对象,注意此处不能定义test，如果定义的那就是一个新的对象，将会提示无法找到hello方法 test.hello("js调用了android中的hello方法"); } </script> </html>友情提示：修改index.html文件时，记得clean project一下，因为你运行时间AS编译器不会去编译assets里面的文件，或者在项目的build.gradle加上sourceSets { main { manifest.srcFile 'src/main/AndroidManifest.xml' java.srcDirs = ['src/main/java', 'src/main/aidl'] resources.srcDirs = ['src/main/java', 'src/main/aidl'] aidl.srcDirs = ['src/main/aidl'] res.srcDirs = ['src/main/res'] assets.srcDirs = ['src/main/assets'] } }

Android 为TV端助力