Unable to run Camera Codename One - codenameone

Question

I tried to run the demo code provided in the capture class in the documentation to click a photo but it gives me the following error:-
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)
The UTFDataFormatException is always there in a new hello world program too and hasn't affected the running of any code I've written until now. But the IllegalStateException crashes the app in the simulator. It also doesn't point to the line which raises this exception in my code.

Answer 1

There seems to be something seriously wrong with your installation of Codename One. That exception should never happen and indicates that something major is broken.

Answer 2

With a few playing around with the code, I was able to launch the camera successfully. The following is the running code for the benefits of others who may experience a similar problem:-
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 Codename One 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() {
}
}