JS调JAVA代码

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>

 

posted on 2015-03-02 17:07  a0000  阅读(248)  评论(0)  编辑  收藏  举报

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