Question

我不知道为什么以下代码在模拟器中工作正常并且在Android手机中失败。

package com.mycompany.myapp;

import com.codename1.components.WebBrowser;
import com.codename1.ui.Display;
import com.codename1.ui.Form;
import com.codename1.ui.Dialog;
import com.codename1.ui.Label;
import com.codename1.ui.plaf.UIManager;
import com.codename1.ui.util.Resources;
import com.codename1.io.Log;
import com.codename1.javascript.JSFunction;
import com.codename1.javascript.JSObject;
import com.codename1.javascript.JavascriptContext;
import com.codename1.ui.BrowserComponent;
import com.codename1.ui.Toolbar;
import com.codename1.ui.layouts.BorderLayout;
import java.io.IOException;


public class MyApplication {

    private Form current;
    private Resources theme;

    public void init(Object context) {
        theme = UIManager.initFirstTheme("/theme");

        // Enable Toolbar on all Forms by default
        Toolbar.setGlobalToolbar(true);

        // Pro only feature, uncomment if you have a pro subscription
        // Log.bindCrashProtection(true);
    }

    public void start() {
        if(current != null){
            current.show();
            return;
        }
      Form hi = new Form("Hi World");
final WebBrowser b = new WebBrowser(){
    @Override
    public void onLoad(String url) {
        // Placed on onLoad because we need to wait for page 
        // to load to interact with it.

        BrowserComponent c = (BrowserComponent)this.getInternal();

        // Create a Javascript context for this BrowserComponent
        JavascriptContext ctx = new JavascriptContext(c);

        // Now use the context to interact with Javascript environment....



          JSObject window = (JSObject)ctx.get("window");
     window.set("addAsync", new JSFunction(){

            public void apply(JSObject self, final Object[] args) {
                Double a = (Double)args[0];
                Double b = (Double)args[1];
                JSObject callback = (JSObject)args[2];

                double result = a.doubleValue() + b.doubleValue();
                Dialog.show("testing",result +"", "ok","");
                callback.call(new Object[]{new Double(result)});

            }

        });




    //    Dialog.show("Content", pageContent, "OK", "Cancel");
    } 
};
// b.setURL("jar:///mydata.html");



b.setPage("<html><body>"
        + ""+

"    <head>\n" +
"        <title>Addition Example</title>\n" +
"    </head>\n" +
"    <body>\n" +
"        <div>Addition Example</div>\n" +
"        <p><input type=\"text\" size=\"4\" id=\"input1\"/> +\n" +
"            <input type=\"text\" size=\"4\" id=\"input2\"/> =\n" +
"            <span id=\"result\"></span>\n" +
"        </p>\n" +
"        <p><button id=\"calculate\">Calculate</button></p>\n" +
"        <script>\n" +
"            \n" +
"       document\n" +
"    .getElementById('calculate')\n" +
"    .addEventListener('click', function(){\n" +
"        var aField = document.getElementById('input1');\n" +
"        var bField = document.getElementById('input2');\n" +
"        var a = parseFloat(aField.value);\n" +
"        var b = parseFloat(bField.value);\n" +
"        window.addAsync(a, b, function(result){\n" +
"           document.getElementById('result').innerHTML = result;\n" +
"        });\n" +
"    }, true);\n" +
"     \n" +
  "            \n" +
"        </script>\n" 


        + ""
        + " </body></html>", null);



hi.setLayout(new BorderLayout());
hi.addComponent(BorderLayout.CENTER, b);
hi.show();
    }

    public void stop() {
        current = Display.getInstance().getCurrent();
        if(current instanceof Dialog) {
            ((Dialog)current).dispose();
            current = Display.getInstance().getCurrent();
        }
    }

    public void destroy() {
    }

}

我在我的模拟器上使用了代码来测试它的功能，它运行正常。当我在我的Android手机上构建并安装它时，令我惊讶的是，它没有按预期工作。我不知道我需要添加什么来让我在手机上工作。请帮助我。感谢

模拟器上的屏幕短视

当我点击手机上的计算按钮时，它没有收到任何消息，也没有进行任何计算。请问我只是用它来测试运行。我对这个项目走得很远。谢谢你的帮助

Answer 1

这是Javascript网桥中的一个错误，它影响了某些版本的Android（并非所有版本）。我修复了它here，以便您的代码在星期五的下一次服务器更新后工作。

如果您将“setPage（）”的第二个参数更改为某个虚拟网址（例如http://www.codenameone.com），那么它也应该同时解决此问题。

为什么传递Javascript Callback到Callback在Android手机上不起作用，并且在CN1上的模拟器上运行

1 个答案: