日期:2014-05-16 浏览次数:20517 次
Android 中可以通过webview来实现和js的交互,在程序中调用js代码,只需要将webview控件的支持js的属性设置为true
Android(Java)与JavaScript(HTML)交互有四种情况:
1) Android(Java)调用HTML中js代码
2) Android(Java)调用HTML中js代码(带参数)
3) HTML中js调用Android(Java)代码
4) HTML中js调用Android(Java)代码(带参数)
下面示例总结这四种情况,直接上干货:
1) Android(Java)
private void showWebView(){ // webView与js交互代码 try { mWebView = new WebView(this); setContentView(mWebView); mWebView.requestFocus(); mWebView.setWebChromeClient(new WebChromeClient(){ @Override public void onProgressChanged(WebView view, int progress){ JSAndroidActivity.this.setTitle("Loading..."); JSAndroidActivity.this.setProgress(progress); if(progress >= 80) { JSAndroidActivity.this.setTitle("JsAndroid Test"); } } }); mWebView.setOnKeyListener(new View.OnKeyListener() { // webview can go back @Override public boolean onKey(View v, int keyCode, KeyEvent event) { if(keyCode == KeyEvent.KEYCODE_BACK && mWebView.canGoBack()) { mWebView.goBack(); return true; } return false; } }); WebSettings webSettings = mWebView.getSettings(); webSettings.setJavaScriptEnabled(true); webSettings.setDefaultTextEncodingName("utf-8"); mWebView.addJavascriptInterface(getHtmlObject(), "jsObj"); mWebView.loadUrl("http://192.168.1.121:8080/jsandroid/index.html"); } catch (Exception e) { e.printStackTrace(); } } private Object getHtmlObject(){ Object insertObj = new Object(){ public String HtmlcallJava(){ return "Html call Java"; } public String HtmlcallJava2(final String param){ return "Html call Java : " + param; } public void JavacallHtml(){ runOnUiThread(new Runnable() { @Override public void run() { mWebView.loadUrl("javascript: showFromHtml()"); Toast.makeText(JSAndroidActivity.this, "clickBtn", Toast.LENGTH_SHORT).show(); } }); } public void JavacallHtml2(){ runOnUiThread(new Runnable() { @Override public void run() { mWebView.loadUrl("javascript: showFromHtml2('IT-homer blog')"); Toast.makeText(JSAndroidActivity.this, "clickBtn2", Toast.LENGTH_SHORT).show(); } }); } }; return insertObj; }
2) js(HTML)
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <!-- saved from url=(0032)http://localhost:8080/jsandroid/ --> <html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <meta http-equiv="Expires" content="0"> <meta http-equiv="Pragma" content="no-cache"> <meta http-equiv="Cache-Control" content="no-store,no-cache"> <meta name="Handheldfriendly" content="true"> <meta name="viewport" content="width=100%; initial-scale=1.0; user-scalable=yes"> <meta name="robots" content="all"> <meta name="keywords" contect="doodle, mobile, doodlemobile, game, games"> <meta name="description" content="Make People's Mobile Life More Connected Through Games."> <title>jsandroid_test</title> <script type="text/javascript" language="javascript"> function showHtmlcallJava(){ var s