Question

我尝试运行documentation中捕获类中提供的演示代码来点击照片，但它给了我以下错误： -

java.io.UTFDataFormatException: malformed input around byte 64
    at java.io.DataInputStream.readUTF(Unknown Source)
    at java.io.DataInputStream.readUTF(Unknown Source)
    at com.codename1.ui.util.Resources.loadTheme(Resources.java:1270)
    at com.codename1.ui.util.Resources.openFileImpl(Resources.java:303)
    at com.codename1.ui.util.Resources.openFile(Resources.java:269)
    at com.codename1.ui.util.Resources.<init>(Resources.java:189)
    at com.codename1.ui.util.Resources.open(Resources.java:768)
    at com.codename1.ui.util.Resources.open(Resources.java:688)
    at com.codename1.impl.javase.JavaSEPort$4.run(JavaSEPort.java:1556)
    at com.codename1.ui.Display.processSerialCalls(Display.java:1152)
    at com.codename1.ui.Display.mainEDTLoop(Display.java:969)
    at com.codename1.ui.RunnableWrapper.run(RunnableWrapper.java:120)
    at com.codename1.impl.CodenameOneThread.run(CodenameOneThread.java:176)
java.lang.IllegalStateException: Layout doesn't support adding with arguments: com.codename1.ui.layouts.FlowLayout
    at com.codename1.ui.layouts.Layout.addLayoutComponent(Layout.java:64)
    at com.codename1.ui.Container.addComponent(Container.java:557)
    at com.codename1.ui.Form.addComponent(Form.java:1214)
    at com.codename1.ui.Container.add(Container.java:198)
    at com.mycompany.myapp.MyApplication.start(MyApplication.java:165)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.codename1.impl.javase.Executor$1$1.run(Executor.java:123)
    at com.codename1.ui.Display.processSerialCalls(Display.java:1152)
    at com.codename1.ui.Display.mainEDTLoop(Display.java:969)
    at com.codename1.ui.RunnableWrapper.run(RunnableWrapper.java:120)
    at com.codename1.impl.CodenameOneThread.run(CodenameOneThread.java:176)

UTFDataFormatException总是出现在一个新的hello world程序中，并且没有影响到目前为止我编写过的任何代码的运行。但是IllegalStateException在模拟器中崩溃了应用程序。它也没有指向在我的代码中引发此异常的行。

Answer 1

您安装Codename One似乎存在严重问题。这种例外永远不会发生，并表明某些重大事件已被打破。

Answer 2

随着一些代码的玩法，我能够成功启动相机。以下是可能遇到类似问题的其他人的好处的运行代码： -

package com.mycompany.myapp;


import com.codename1.ui.Display;
import com.codename1.ui.FontImage;
import com.codename1.ui.Form;
import com.codename1.ui.Graphics;
import com.codename1.ui.Image;
import com.codename1.ui.Dialog;
import com.codename1.ui.Label;
import com.codename1.ui.plaf.Style;
import com.codename1.ui.plaf.UIManager;
import com.codename1.ui.util.Resources;
import com.codename1.capture.Capture;
import com.codename1.io.Log;
import com.codename1.ui.Toolbar;
import com.codename1.ui.layouts.BorderLayout;

import java.io.IOException;

/**
 * This file was generated by <a href="https://www.codenameone.com/">Codename One</a> for the purpose 
 * of building native mobile applications using Java.
 */
public class Camera {

    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("Rounder", new BorderLayout());
//        Label picture = new Label("", "Container");
//        hi.add(BorderLayout.CENTER, picture);
//        hi.getUnselectedStyle().setBgColor(0xff0000);
//        hi.getUnselectedStyle().setBgTransparency(255);
//        Style s = UIManager.getInstance().getComponentStyle("TitleCommand");
//        Image camera = FontImage.createMaterial(FontImage.MATERIAL_CAMERA, s);
//        hi.getToolbar().addCommandToRightBar("", camera, (ev) -> {
//            try {
//                int width = Display.getInstance().getDisplayWidth();
//                Image capturedImage = Image.createImage(Capture.capturePhoto(width, -1));
//                Image roundMask = Image.createImage(width, capturedImage.getHeight(), 0xff000000);
//                Graphics gr = roundMask.getGraphics();
//                gr.setColor(0xffffff);
//                gr.fillArc(0, 0, width, width, 0, 360);
//                Object mask = roundMask.createMask();
//                capturedImage = capturedImage.applyMask(mask);
//                picture.setIcon(capturedImage);
//                hi.revalidate();
//            } catch(IOException err) {
//                Log.e(err);
//            }
//        });
        Form hi = new Form("Camera", new BorderLayout());
        Label picture = new Label("", "Container");
        hi.add(BorderLayout.CENTER,picture);
        Style s = UIManager.getInstance().getComponentStyle("TitleCommand");
        Image camera = FontImage.createMaterial(FontImage.MATERIAL_CAMERA, s);
        hi.getToolbar().addCommandToRightBar("", camera, ev -> {
            try {
                Image image = Image.createImage(Capture.capturePhoto());
                picture.setIcon(image);
                hi.revalidate();
            } catch (IOException e) {
                // TODO: handle exception
                Log.e(e);
            }
        });
        hi.show();
    }

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

    public void destroy() {
    }

}

无法运行Camera Codename One

2 个答案: