原文地址：http://droidyue.com/blog/2014/09/20/interaction-between-java-and-javascript-in-android/
Activiy
public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); final WebView myWebView = (WebView) findViewById(R.id.myWebView); WebSettings settings = myWebView.getSettings(); settings.setJavaScriptEnabled(true); myWebView.addJavascriptInterface(new JsInteration(), "control"); myWebView.setWebChromeClient(new WebChromeClient() { }); myWebView.setWebViewClient(new WebViewClient() { @Override public void onPageFinished(WebView view, String url) { super.onPageFinished(view, url); testMethod(myWebView); } }); myWebView.loadUrl("file:///android_asset/js_java_interaction.html"); } private void testMethod(WebView webView) { String call = "javascript:sayHello()"; //call = "javascript:alertMessage("" + "content" + "")"; call = "javascript:toastMessage("" + "content" + "")"; //call = "javascript:sumToJava(1,2)"; webView.loadUrl(call); } public class JsInteration { @JavascriptInterface public void toastMessage(String message) { Toast.makeText(getApplicationContext(), message, Toast.LENGTH_LONG) .show(); } @JavascriptInterface public void onSumResult(int result) { //Log.i(LOGTAG, "onSumResult result=" + result); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } }
Html代码
<html> <script type="text/javascript"> function sayHello() { alert("Hello") } function alertMessage(message) { alert(message) } function toastMessage(message) { window.control.toastMessage(message) } function sumToJava(number1, number2){ window.control.onSumResult(number1 + number2) } </script> Java-Javascript Interaction In Android </html>