Saving data to persistent store bug in BlackBerry 6 - blackberry

Question

I am trying to save a path to an image in the persistent store to show the image when a user chooses a specific product from a history list(one image per product, taken by the user). Now the problem I am having is that when I load the app to the phone for the first time and try adding an entry to the persistent store, it throws an error a bit after and the app freezes. However when I come back, and add an image again, it works just fine and the images always load when I choose each specific product.
This is leading me to believe that the culprit is the first store8.commit() that I'm doing, for some reason it throws an exception : No Stack Trace, when debugging. Here is my code:
public class Storage extends Application {
private static final long PERSISTENT_KEY8 = 0x2c4c45c139ee9728L;
static PersistentObject store8 = PersistentStore.getPersistentObject(PERSISTENT_KEY8);
private static Vector pics;
/**
* Picture Section ***********************************************************
*/
public static void savePicture(){
store8.setContents(new Vector());
store8.commit();
if(pics == null){
pics = new Vector();
}
synchronized(store8) {
store8.setContents(pics);
store8.commit();
}
}
public static String getPicture(String productName){
if(pics.size()==0){
return "";
}else{
for(int i = 0; i < pics.size(); i++){
Pics product = (Pics)pics.elementAt(i);
if(product.getProductName().equals(productName)){
return product.getPic();
}
}
return "";
}
}
public static void removePicture(String productName){
if(pics.size()==0){
return;
}else{
for(int i = 0; i < pics.size(); i++){
Pics product = (Pics)pics.elementAt(i);
if(product.getProductName().equals(productName)){
pics.removeElementAt(i);
}
}
}
}
public static void loadPicture(){
pics = (Vector)store8.getContents();
if(pics == null){
pics = new Vector();
}
}
public static void setPicture(Pics pro){
if(pics.size()!=0){
for(int j = 0; j< pics.size() ; j++){
Pics product = (Pics)pics.elementAt(j);
if(pro.getProductName().equals(product.getProductName())){
pics.removeElementAt(j);
}
}
}
pics.addElement(pro);
}
}
So that is the class that contains my methods to save the image. Now for the other class where I am manipulating it:
public class ProductImage extends MainScreen implements FieldChangeListener, AppLaunchResource {
private ImageButtonField logo;
private ButtonField newImage, chooseExisting;
public static BitmapField takenPicture;
//public static String picPath ="";
private String currentPicture = "";
private String currentProduct ="";
public ProductImage(String productName){
super(VERTICAL_SCROLL|VERTICAL_SCROLLBAR);
currentProduct = productName;
createGUI();
}
public void createGUI(){
deleteAll();
this.setTitle(new LabelField("Add An Image", Field.FIELD_HCENTER));
if(ToolbarManager.isToolbarSupported())
{
Toolbar tb = new Toolbar();
setToolbar(tb.createToolBar());
}
else{
Toolbar tb = new Toolbar();
add(tb.createNavBar());
}
try{
Storage.loadPicture();
}catch(NullPointerException e){
e.printStackTrace();
}
newImage = new ButtonField("Take Photo", ButtonField.CONSUME_CLICK){
public int getPreferredWidth() {
return (int) (net.rim.device.api.system.Display.getWidth());
}
};
chooseExisting= new ButtonField("Change Image", ButtonField.CONSUME_CLICK){
public int getPreferredWidth() {
return (int) (net.rim.device.api.system.Display.getWidth());
}
};
newImage.setChangeListener(this);
chooseExisting.setChangeListener(this);
EncodedImage enc = EncodedImage.getEncodedImageResource("camera.png");
EncodedImage sizeEnc = ImageResizer.sizeImage(enc, Display.getHeight(), Display.getHeight());
takenPicture = new BitmapField(enc.getBitmap());
VerticalFieldManager vfMain = new VerticalFieldManager();
vfMain.add(new SeparatorField());
vfMain.add(newImage);
vfMain.add(chooseExisting);
vfMain.add(takenPicture);
add(vfMain);
currentPicture = Storage.getPicture(currentProduct);
showPicture();
}
public void choosePicture(){
String imageExtensions[] = {"jpg", "jpeg",
"bmp", "png", "gif"};
FileSelectorPopupScreen fps = new FileSelectorPopupScreen(null, imageExtensions);
fps.pickFile();
String theFile = fps.getFile();
UiApplication.getUiApplication().pushScreen(fps);
if (theFile == null)
{
Dialog.alert("Screen was dismissed. No file was selected.");
}
else
{
try{
String path= "file:///" + theFile;
byte[] data = getData(path);
//Encode and Resize image
EncodedImage eImage = EncodedImage.createEncodedImage(data,0,data.length);
if(Display.getHeight()>Display.getWidth()){
int scaleFactorX = Fixed32.div(Fixed32.toFP(eImage.getWidth()),
Fixed32.toFP(Display.getWidth()));
int scaleFactorY = Fixed32.div(Fixed32.toFP(eImage.getHeight()),
Fixed32.toFP((Display.getWidth()*Display.getWidth())/Display.getHeight()));
eImage=eImage.scaleImage32(scaleFactorX, scaleFactorY);
}
else{
int scaleFactorX = Fixed32.div(Fixed32.toFP(eImage.getWidth()),
Fixed32.toFP(Display.getWidth()));
int scaleFactorY = Fixed32.div(Fixed32.toFP(eImage.getHeight()),
Fixed32.toFP(Display.getHeight()));
eImage=eImage.scaleImage32(scaleFactorX, scaleFactorY);
}
UiApplication.getUiApplication().popScreen(fps);
takenPicture.setBitmap(eImage.getBitmap());
Storage.setPicture(new Pics(currentProduct, path));
try{
Storage.savePicture();
}catch(Exception e){
e.printStackTrace();
}
}
catch(Exception e){
}
Dialog.alert("Picture Saved");
}
}
public void showPicture(){
if(currentPicture != ""){
try{
String path= currentPicture;
byte[] data = getData(path);
//Encode and Resize image
EncodedImage eImage = EncodedImage.createEncodedImage(data,0,data.length);
if(Display.getHeight()>Display.getWidth()){
int scaleFactorX = Fixed32.div(Fixed32.toFP(eImage.getWidth()),
Fixed32.toFP(Display.getWidth()));
int scaleFactorY = Fixed32.div(Fixed32.toFP(eImage.getHeight()),
Fixed32.toFP((Display.getWidth()*Display.getWidth())/Display.getHeight()));
eImage=eImage.scaleImage32(scaleFactorX, scaleFactorY);
}
else{
int scaleFactorX = Fixed32.div(Fixed32.toFP(eImage.getWidth()),
Fixed32.toFP(Display.getWidth()));
int scaleFactorY = Fixed32.div(Fixed32.toFP(eImage.getHeight()),
Fixed32.toFP(Display.getHeight()));
eImage=eImage.scaleImage32(scaleFactorX, scaleFactorY);
}
takenPicture.setBitmap(eImage.getBitmap());
}
catch(Exception e){
}
}
}
public void fieldChanged(Field field, int context) {
if(field == logo){
}
else if(field == newImage){
takePicture();
}
else if(field == chooseExisting){
choosePicture();
}
}
}
I removed many parts of this class, sorry if it is long, there are basically 4 Storage method calls in this code and I believe they are all in the right place.. but again im having the problem on first load, not afterwards.
Can anyone see what Im doing wrong here? I have had this problem for a week
Thanks for any help provided!

Answer 1

Try something like this:
public class Storage extends Application{
private static final long PERSISTENT_KEY8 = 0x2c4c45c139ee9728L;
static PersistentObject store8 = null;
private static Vector pics = null;
static{
store8 = PersistentStore.getPersistentObject(PERSISTENT_KEY8)
pics = (Vector)store8.getContents();
if(pics == null){
pics = new Vector();
store8.setContents(pics);
store8.commit();
}
}
public static void savePicture(){
try{
synchronized(store8){
store8.setContents(pics);
store8.commit();
}
}
catch(Exception e){
e.printStackTrace();
}
}
public static int findPicture(String productName){
for(int i = 0; i < pics.size(); i++){
Pics product = (Pics)pics.elementAt(i);
if(product.getProductName().equals(productName)){
return i;
}
}
return -1;
}
public static String getPicture(String productName){
int idx = findPicture(productName);
if(idx != -1){
return ((Pics)pics.elementAt(idx)).getPic();
}
return "";
}
public static void removePicture(String productName){
int idx = findPicture(productName);
if(idx != -1){
pics.removeElementAt(idx);
}
}
public static void setPicture(Pics pro){
removePicture(pro.getProductName());
pics.addElement(pro);
}
}
.
public class ProductImage extends MainScreen implements FieldChangeListener, AppLaunchResource {
private ImageButtonField logo;
private ButtonField newImage, chooseExisting;
public static BitmapField takenPicture;
//public static String picPath ="";
private String currentPicture = "";
private String currentProduct = "";
public ProductImage(String productName){
super(VERTICAL_SCROLL|VERTICAL_SCROLLBAR);
currentProduct = productName;
createGUI();
}
public void createGUI(){
deleteAll();
setTitle(new LabelField("Add An Image", Field.FIELD_HCENTER));
Toolbar tb = new Toolbar();
if(ToolbarManager.isToolbarSupported()){
setToolbar(tb.createToolBar());
}
else{
add(tb.createNavBar());
}
newImage = new ButtonField("Take Photo", ButtonField.CONSUME_CLICK){
public int getPreferredWidth() {
return (int) Display.getWidth();
}
};
chooseExisting = new ButtonField("Change Image", ButtonField.CONSUME_CLICK){
public int getPreferredWidth() {
return (int) Display.getWidth();
}
};
newImage.setChangeListener(this);
chooseExisting.setChangeListener(this);
EncodedImage enc = EncodedImage.getEncodedImageResource("camera.png");
EncodedImage sizeEnc = ImageResizer.sizeImage(enc, Display.getHeight(), Display.getHeight());
takenPicture = new BitmapField(enc.getBitmap());
VerticalFieldManager vfMain = new VerticalFieldManager();
vfMain.add(new SeparatorField());
vfMain.add(newImage);
vfMain.add(chooseExisting);
vfMain.add(takenPicture);
add(vfMain);
currentPicture = Storage.getPicture(currentProduct);
showPicture();
}
public void choosePicture(){
String imageExtensions[] = {"jpg", "jpeg", "bmp", "png", "gif"};
FileSelectorPopupScreen fps = new FileSelectorPopupScreen(null, imageExtensions);
fps.pickFile();
String theFile = fps.getFile();
if (theFile == null){
Dialog.alert("Screen was dismissed. No file was selected.");
return;
}
EncodedImage eImage = loadImage("file:///" + theFile);
if(eImage != null){
takenPicture.setBitmap(eImage.getBitmap());
Storage.setPicture(new Pics(currentProduct, path));
Storage.savePicture();
Dialog.alert("Picture Saved");
}
}
private EncodedImage loadImage(String path){
try{
byte[] data = getData(path);
//Encode and Resize image
EncodedImage eImage = EncodedImage.createEncodedImage(data,0,data.length);
int scaleFactorX, scaleFactorY;
if(Display.getHeight()>Display.getWidth()){
scaleFactorX = Fixed32.div(Fixed32.toFP(eImage.getWidth()), Fixed32.toFP(Display.getWidth()));
scaleFactorY = Fixed32.div(Fixed32.toFP(eImage.getHeight()), Fixed32.toFP((Display.getWidth()*Display.getWidth())/Display.getHeight()));
}
else{
scaleFactorX = Fixed32.div(Fixed32.toFP(eImage.getWidth()), Fixed32.toFP(Display.getWidth()));
scaleFactorY = Fixed32.div(Fixed32.toFP(eImage.getHeight()), Fixed32.toFP(Display.getHeight()));
}
return eImage.scaleImage32(scaleFactorX, scaleFactorY);
}
catch (Exception e){
return null;
}
}
public void showPicture(){
if(currentPicture != ""){
EncodedImage eImage = loadImage(currentPicture);
if (eImage != null){
takenPicture.setBitmap(eImage.getBitmap());
}
}
}
public void fieldChanged(Field field, int context){
if(field == logo){
}
else if(field == newImage){
takePicture();
}
else if(field == chooseExisting){
choosePicture();
}
}
}