I'm trying to make an app that displays images continuosly (4 or 5 times per second) so i need to update an image held inside a ImageView object, it works if i trigger the functions from a button press, every time i press the button the next image gets displayed:
int i = 0;
public void buttonPressed(View view) {
ImageView image = (ImageView) findViewById(R.id.imageView5);
String path = String.format("/storage/emulated/0/Download/%d.bmp", i);
File imgFile = new File(path);
bMap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
image.setImageBitmap(bMap);
i++;
}
But if i try to call the same functions more than once in the same parent function or i try to run them in a loop the first images are not loaded at all and only the last is finally displayed after loopFunc() completed:
public void loopFunc() {
ImageView image = (ImageView) findViewById(R.id.imageView5);
for (i = 1; i < 3; i++) {
String path = String.format("/storage/emulated/0/Download/%d.bmp", i);
File imgFile = new File(path);
bMap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
image.setImageBitmap(bMap);
//wait some time or do other things...
}
}
In few words i need to be able to execute image.setImageBitmap(bMap); from code and not from buttons anyone knows how? thanks
The problem lies in the time you used to compute other things. Is there some kind of delay function code you wrote in it.
Try this. Just make a function and call it onCreate method with some Thread or Handler.
public void imgViwer()
{
Thread thread=new Thread(new Runnable() {
#Override
public void run() {
try {
for (i = 1; i < 3; i++) {
String path = String.format("/storage/emulated/0/Download/%d.bmp", i);
File imgFile = new File(path);
bMap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
image.setImageBitmap(bMap);
}
Thread.sleep(200);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
});
}
After every 200ms your loop works.
Root cause
Because the loop is run too quickly in a short time, that why you see the first image is not displayed at all, and only the last is finally displayed after loopFunc() completed.
Solution
To display a sequence of images continuously per second, then you should use Handler.
public void loopFunc() {
Handler mainHandler = new Handler(Looper.getMainLooper());
int totalImage = 3;
for (int i = 1; i < totalImage; i++) {
int imageIndex = i;
mainHandler.postDelayed(new Runnable() {
#Override
public void run() {
String path = String.format("/storage/emulated/0/Download/%d.bmp", imageIndex);
File imgFile = new File(path);
bMap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
image.setImageBitmap(bMap);
}
}, 1000 / totalImage * imageIndex);
}
}
OK, so I had an issue where my images weren't showing when the .jar file was run.
Fixed that by using a fix from robberman I think his tag was.
Anyways once I fixed that by getting the images from getResourceAsStream etc it worked fine. So when creating the background image, a JLabel with an image, and JButtons with images as new components, this works great!
Problem I keep running into now is I have 3 buttons that need to change their icons in certain situations. I've tested this and it works without the NullPointerException in my test class, but when I try this in my projects class I get a NullPointerException each time it tries to setIcon.
Here's the method I setup to change the Icon. (I've tried this many different ways, and thought this would be easiest to see since it happens no matter what I do. ) Here's the constructor, the createGUI and the method to change the icons. Please help me out figuring what I'm doing wrong.
public class Addons {
// Setup any variables needed for this class to run
private JPanel addonsList;
private JLabel patchNotes;
private JProgressBar progressBar;
private JTable addonsTable;
private SaveSettings sav;
private Updater util;
private JButton instructions;
private JButton installButton;
private JButton finishedButton;
private boolean finishedAll;
private boolean upAvail;
private Task task;
// Setup the tables for use in the listings
/**
* Default constructor
*
*/
public Addons(Updater util) {
// Load up the saved settings.
sav = new SaveSettings();
sav.loadSave();
this.util = util;
finishedAll = false;
upAvail = false;
createAddonsGUI();
}
/**
* This method will create the gui for use in the constructor
*
*/
private void createAddonsGUI() {
// create base panel
addonsList = new JPanel();
addonsList.setPreferredSize(new Dimension(800,435));
addonsList.setOpaque(false);
SpringLayout addonsListLO = new SpringLayout();
addonsList.setLayout(addonsListLO);
// Create and place scroll frame with patch notes panel in it.
JScrollPane patchNotesPanel = createPatchNotesPanel();
patchNotesPanel.setPreferredSize(new Dimension(370,300));
addonsList.add(patchNotesPanel);
// create and place progress bar
//JLabel progressBarBackground = new JLabel(new ImageIcon(util.PROGBACK_IMAGE_PATH));
JLabel progressBarBackground = new JLabel();
try {
Image mypBarPic = ImageIO.read(getClass().getClassLoader().getResourceAsStream("com/dynastyaddons/updater/ProgressBackground.png"));
progressBarBackground = new JLabel(new ImageIcon(mypBarPic));
} catch (IOException ignore) {
System.out.println("Error: " + ignore.getMessage());
}
addonsList.add(progressBarBackground);
SpringLayout pBarLO = new SpringLayout();
progressBarBackground.setLayout(pBarLO);
progressBarBackground.setOpaque(false);
progressBar = new JProgressBar(0, 100);
progressBar.setValue(0);
progressBar.setStringPainted(true);
progressBarBackground.add(progressBar);
pBarLO.putConstraint(SpringLayout.WEST, progressBar, 21, SpringLayout.WEST, progressBarBackground);
pBarLO.putConstraint(SpringLayout.NORTH, progressBar, 15, SpringLayout.NORTH, progressBarBackground);
pBarLO.putConstraint(SpringLayout.EAST, progressBar, -21, SpringLayout.EAST, progressBarBackground);
pBarLO.putConstraint(SpringLayout.SOUTH, progressBar, -45, SpringLayout.SOUTH, progressBarBackground);
// Create and place Finish button
//finishedButton = new JButton(new ImageIcon(util.FINOFF_IMAGE_PATH));
//public static final String FINOFF_IMAGE_PATH = "F:\\Java Programs\\Updater\\src\\com\\dynastyaddons\\updater\\images\\FinishedOff.png";
JButton finishedButton = new JButton();
try {
Image myfinishedButtonPic = ImageIO.read(getClass().getClassLoader().getResourceAsStream("com/dynastyaddons/updater/FinishedOff.png"));
finishedButton = new JButton(new ImageIcon(myfinishedButtonPic));
} catch (IOException ignore) {
System.out.println("Error: " + ignore.getMessage());
}
finishedButton.setBorderPainted(false);
finishedButton.setContentAreaFilled(false);
finishedButton.setFocusPainted(false);
finishedButton.setOpaque(false);
finishedButton.setToolTipText("<html><font size=6>When button glows blue, you're all done and you can press this to close the udpater.</font></html>");
finishedButton.addMouseListener(new MouseAdapter() {
#Override
public void mouseClicked(MouseEvent e) { if(finishedAll) {System.exit(0);} }
});
addonsList.add(finishedButton);
// Create and place Install Addons Button
//installButton = new JButton(new ImageIcon(util.INSTOFF_IMAGE_PATH));
//public static final String INSTOFF_IMAGE_PATH = "F:\\Java Programs\\Updater\\src\\com\\dynastyaddons\\updater\\images\\InstallUpdatesOFF.png";
JButton installButton = new JButton();
try {
Image myinstallButtonPic = ImageIO.read(getClass().getClassLoader().getResourceAsStream("com/dynastyaddons/updater/InstallUpdatesOFF.png"));
installButton = new JButton(new ImageIcon(myinstallButtonPic));
} catch (IOException ignore) {
System.out.println("Error: " + ignore.getMessage());
}
installButton.setBorderPainted(false);
installButton.setContentAreaFilled(false);
installButton.setFocusPainted(false);
installButton.setOpaque(false);
installButton.setToolTipText("<html><center><font size=6>When arrows to the left of this button glow blue, you have updates to install.<br /> <br />Press this button to get the updated versions of your addons.</font></center></html>");
installButton.addMouseListener(new MouseAdapter() {
#Override
public void mouseClicked(MouseEvent e) {
// This will handle installing needed updates
if(upAvail) {
JFrame root = util.getRootFrame();
root.setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
task = new Task();
task.execute();
root.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
}
}
});
addonsList.add(installButton);
// Create and place scroll frame with the addons list table in it.
JPanel addonListPanel = new JPanel();
addonListPanel.setPreferredSize(new Dimension(388,245));
addonsTable = new JTable(new DynastyTableModel());
JTableHeader header = addonsTable.getTableHeader();
ColumnHeaderToolTips tips = new ColumnHeaderToolTips();
header.addMouseMotionListener(tips);
addonListPanel.setLayout(new BorderLayout());
addonListPanel.add(addonsTable.getTableHeader(), BorderLayout.PAGE_START);
addonListPanel.add(new JScrollPane(addonsTable), BorderLayout.CENTER);
// setup table settings
addonsTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
addonsTable.setRowSelectionAllowed(true);
addonsTable.setColumnSelectionAllowed(false);
addonsTable.setBackground(Color.BLACK);
addonsTable.setForeground(Color.WHITE);
//addonsTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
addonsTable.setFillsViewportHeight(true);
addonsTable.setPreferredScrollableViewportSize(addonListPanel.getPreferredSize());
addonsTable.setRowHeight(31);
// setup column width and editing
fitToContentWidth(addonsTable, 0);
fitToContentWidth(addonsTable, 1);
fitToContentWidth(addonsTable, 2);
fitToContentWidth(addonsTable, 3);
fitToContentWidth(addonsTable, 4);
// properly align text in cells
DefaultTableCellRenderer centerRenderer = new DefaultTableCellRenderer();
centerRenderer.setHorizontalAlignment(DefaultTableCellRenderer.CENTER);
addonsTable.getColumn("Version").setCellRenderer( centerRenderer );
//addonsTable.getColumn("Purchase").setCellRenderer( centerRenderer );
addonsTable.getColumn("Size").setCellRenderer( centerRenderer );
//addonsTable.getColumn("Update").setCellRenderer( centerRenderer );
addonsTable.getColumn("Name").setCellRenderer( centerRenderer );
// setup list selector
ListSelectionModel listSelectionModel = addonsTable.getSelectionModel();
listSelectionModel.addListSelectionListener(new SharedListSelectionHandler());
addonsTable.setSelectionModel(listSelectionModel);
addonListPanel.setOpaque(false);
addonsList.add(addonListPanel);
// Create and place the view instructions button.
//instructions = new JButton(new ImageIcon(util.INSTRUCTIONS_BUTTON));
//public static final String INSTRUCTIONS_BUTTON = "F:\\Java Programs\\Updater\\src\\com\\dynastyaddons\\updater\\images\\instructions.png";
JButton instructions = new JButton();
try {
Image myinstructionsPic = ImageIO.read(getClass().getClassLoader().getResourceAsStream("com/dynastyaddons/updater/instructions.png"));
instructions = new JButton(new ImageIcon(myinstructionsPic));
} catch (IOException ignore) {
System.out.println("Error: " + ignore.getMessage());
}
instructions.setBorderPainted(false);
instructions.setContentAreaFilled(false);
instructions.setFocusPainted(false);
instructions.setOpaque(false);
instructions.setToolTipText("<html><center><font size=6>When this button shows purchase you can click it to go purchase the selected addon.<br /><br /> When it's showing Instructions you can click it to go see the manual for the selected addon.</font></center></html>");
// Deal with nothing selected when clciking this.
instructions.addMouseListener(new MouseAdapter() {
#Override
public void mouseClicked(MouseEvent e) {
int row = addonsTable.getSelectedRow();
String ad = "";
DynastyTableModel tm = (DynastyTableModel) addonsTable.getModel();
if ( row == -1 ) { return; }
if ( row == 1 || row == 0 || row == 2 ) { ad = "Booster"; }
else {
ad = (String) tm.getValueAt(row,1);
ad = ad.replaceAll("\\s+", "");
}
boolean purchased = (Boolean) tm.getValueAt(row,3);
if (purchased) {
sendTo(ad, 1);
} else {
sendTo(ad,0);
}
}
});
addonsList.add(instructions);
// Constrain all items to the base panel
addonsListLO.putConstraint(SpringLayout.EAST, patchNotesPanel, -18, SpringLayout.EAST, addonsList);
addonsListLO.putConstraint(SpringLayout.NORTH, patchNotesPanel, 0, SpringLayout.NORTH, addonsList);
addonsListLO.putConstraint(SpringLayout.SOUTH, progressBarBackground, -20, SpringLayout.SOUTH, addonsList);
addonsListLO.putConstraint(SpringLayout.WEST, progressBarBackground, 100, SpringLayout.WEST, addonsList);
addonsListLO.putConstraint(SpringLayout.EAST, finishedButton, 0, SpringLayout.EAST, addonsList);
addonsListLO.putConstraint(SpringLayout.SOUTH, finishedButton, -20, SpringLayout.SOUTH, addonsList);
addonsListLO.putConstraint(SpringLayout.SOUTH, installButton, -10, SpringLayout.NORTH, progressBarBackground);
addonsListLO.putConstraint(SpringLayout.WEST, installButton, 190, SpringLayout.WEST, addonsList);
addonsListLO.putConstraint(SpringLayout.WEST, addonListPanel, 18, SpringLayout.WEST, addonsList);
addonsListLO.putConstraint(SpringLayout.NORTH, addonListPanel, 0, SpringLayout.NORTH, addonsList);
addonsListLO.putConstraint(SpringLayout.NORTH, instructions, -180, SpringLayout.SOUTH, addonsList);
addonsListLO.putConstraint(SpringLayout.WEST, instructions, 20, SpringLayout.WEST, addonsList);
}
/**
* This will update the table with info from the users database entry.
*
*/
public void updateTable() {
String totalIn = "";
String s = "";
String aName = "";
String aVersion = "";
String aFileSize = "";
String aInfo = "";
DynastyTableModel tm = (DynastyTableModel) addonsTable.getModel();
sav.loadSave();
try {
URL serverURL = new URL(Updater.URL_CONNECT + "action=get_addons&email=" + sav.getSetting("UserName") + "&PHPSESSID=" + util.getPHPSessionID());
HttpURLConnection serverConnection = (HttpURLConnection) serverURL.openConnection();
serverConnection.setRequestMethod("GET");
BufferedReader in = new BufferedReader(new InputStreamReader(serverConnection.getInputStream()));
while (( totalIn = in.readLine()) != null) {
s += totalIn;
}
String[] splitOne = s.split("\\|-\\|");
for ( int a = 0; a < splitOne.length; a++) {
String[] splitTwo = splitOne[a].split("\\|");
String addonName = splitTwo[0];
for ( int b = 0; b < tm.getRowCount(); b++) {
if ( addonName.equals( (String) tm.getValueAt(b,1) ) ) { // b is the correct place to place the table info into addons[][]
tm.setValueAt(splitTwo[1],b,2);
tm.setValueAt(true,b,3);
double byteSize = Double.parseDouble(splitTwo[2]);
double kbyteSize = (byteSize/1024.0);
DecimalFormat dec = new DecimalFormat("00.00");
tm.setValueAt(dec.format(kbyteSize),b,4);
pNotes[b][0] = splitTwo[3];
}
}
}
} catch (MalformedURLException e) {
JOptionPane.showMessageDialog(null, "Please send this entire error to support#dyanstyaddons.com. Also you can close the updater and re-open it and that sometimes removes this issue.\n Error # 22", "Attention!",JOptionPane.ERROR_MESSAGE);
} catch (IOException e) {
JOptionPane.showMessageDialog(null, "Please send this entire error to support#dynastyaddons.com. Also you can close the updater and re-open it and that sometimes removes this issue.\n Error # 23" + e.getMessage(), "Attention!",JOptionPane.ERROR_MESSAGE);
}
checkLocalAddons();
}
/**
* This method checks the version numbers to see what what needs updating
* then updates the table to reflect this.
*
*/
private void needsUpdate() {
DynastyTableModel tm = (DynastyTableModel)addonsTable.getModel();
for ( int a = 0; a < tm.getRowCount(); a++) {
String ver = (String) tm.getValueAt(a,2).toString();
if(!ver.equals(localVersion[a][0])) {
boolean purch = (boolean) tm.getValueAt(a,3);
System.out.println("Set value at " + a + " 0 to: " + purch);
if(purch) {tm.setValueAt(true,a,0);}
}else{
tm.setValueAt(false,a,0);
}
}
checkUpdatesAvail();
}
/**
* This method will check if any of the udpate boxes are checked, and update the install button.
*
*
*/
private void checkUpdatesAvail() {
DynastyTableModel tm = (DynastyTableModel) addonsTable.getModel();
boolean update = false;
for ( int a = 0; a < tm.getRowCount(); a++) {
boolean u = (Boolean) tm.getValueAt(a,0);
if (u) { update = u; }
}
if (update) {
setImageOnButton("instOn");
upAvail = true;
} else { finishedEverything(); }
}
/**
* This method handles what happens when you click the Install Updates button.
*
*/
private void updateNeededAddons() {
DynastyTableModel tm = (DynastyTableModel) addonsTable.getModel();
boolean[] addUp = {false,false,false,false,false,false,false};
for (int a = 0; a < tm.getRowCount(); a++) {
boolean update = (Boolean) tm.getValueAt(a,0);
int getResult = 2;
if (update) {
addUp[a] = true;
try {
URL dlAddon = new URL(util.URL_CONNECT + "action=download&addon=" + tm.getValueAt(a,1) + "&email=" + sav.getSetting("UserName") + "&PHPSESSID=" + util.getPHPSessionID());
String fileName = tm.getValueAt(a,1) + ".zip";
String fileS = (String) tm.getValueAt(a,4);
double fileSize = Double.parseDouble(fileS);
getResult = getAddons(dlAddon, fileName, fileSize);
} catch(MalformedURLException e) {
JOptionPane.showMessageDialog(null, "We tried to create a query to download your addons, but got a malformedURLException. Please send this entire error to support#dyanstyaddons.com. Also you can close the updater and re-open it and that sometimes removes this issue.\n Error # 31", "Attention!",JOptionPane.ERROR_MESSAGE);
}
if(getResult == 1) {
installAddon((String)tm.getValueAt(a,1));
}
}
}
}
/**
* This method will update the patch notes panel,
* it only allows updating from within this class.
*
* #param txt The new txt for the patch notes panel.
*
*/
private void setPatchNotes(String txt) {
patchNotes.setText(txt);
int prefSize = 370;
boolean width = true;
View view = (View) patchNotes.getClientProperty(javax.swing.plaf.basic.BasicHTML.propertyKey);
view.setSize(width ? prefSize : 0, width ? 0 : prefSize);
float w = view.getPreferredSpan(View.X_AXIS);
float h = view.getPreferredSpan(View.Y_AXIS);
patchNotes.setPreferredSize(new Dimension((int) Math.ceil(w) - 17, (int) Math.ceil(h) + 100));
}
/**
* This will query the server for the updates to the addons
* that are needed and download them as needed.
*
*/
private int getAddons(URL url, String localFilename, double len) {
InputStream is = null;
FileOutputStream fos = null;
try {
URLConnection urlConn = url.openConnection();
HttpURLConnection resp = (HttpURLConnection) urlConn;
int responseCode = resp.getResponseCode();
is = urlConn.getInputStream();
fos = new FileOutputStream(System.getenv("SystemDrive") + "\\DynastyAddons\\" + localFilename);
byte[] buffer = new byte[4096];
int leng = (int) len;
while ((leng = is.read(buffer)) > 0) {
fos.write(buffer,0,leng);
}
is.close();
fos.close();
return 1;
} catch (MalformedURLException e) {
JOptionPane.showMessageDialog(null, "We tried to download your addons, but got a malformedURLException. Please send this entire error to support#dyanstyaddons.com. Also you can close the updater and re-open it and that sometimes removes this issue.\n Error # 32", "Attention!",JOptionPane.ERROR_MESSAGE);
return 2;
} catch (IOException e) {
JOptionPane.showMessageDialog(null, "We tried to download your addons, but got an IOException. Please send this entire error to support#dynastyaddons.com. Also you can close the updater and re-open it and that sometimes removes this issue.\n Error # 33" + e, "Attention!",JOptionPane.ERROR_MESSAGE);
return 2;
}
}
/**
* This will update the finished button once all is done.
*
*/
private void finishedEverything() {
setImageOnButton("instOff");
setImageOnButton("finOn");
upAvail = false;
finishedAll = true;
}
public void setImageOnButton(String buttonName){
ImageIcon icon;
switch(buttonName) {
case "purchase": try {
System.out.println("Trying to setIcon on Instructions Button. File: com/dynastyaddons/updater/Purchase.png exists? " + new File("com/dynastyaddons/updater/Purchase.png").exists());
Image pic1 = ImageIO.read(Addons.class.getClassLoader().getResourceAsStream("com/dynastyaddons/updater/Purchase.png"));
icon = new ImageIcon(pic1);
instructions.setIcon(icon);
} catch (IOException e) { System.out.println("IO Exception setting icon to instructions: " + e.getMessage()); }
break;
case "instructions":try {
System.out.println("Trying to setIcon on Instructions Button. File: com/dynastyaddons/updater/instructions.png exists? " + new File("com/dynastyaddons/updater/instructions.png").exists());
Image pic2 = ImageIO.read(Addons.class.getClassLoader().getResourceAsStream("com/dynastyaddons/updater/instructions.png"));
icon = new ImageIcon(pic2);
instructions.setIcon(icon);
} catch (IOException e) { System.out.println("IO Exception setting icon to instructions2: " + e.getMessage()); }
break;
case "finOn": try {
System.out.println("Trying to setIcon on Instructions Button. File: com/dynastyaddons/updater/FinishedOn.png exists? " + new File("com/dynastyaddons/updater/FinishedOn.png").exists());
Image pic3 = ImageIO.read(Addons.class.getClassLoader().getResourceAsStream("com/dynastyaddons/updater/FinishedOn.png"));
icon = new ImageIcon(pic3);
finishedButton.setIcon(icon);
} catch (IOException e) { System.out.println("IO Exception setting icon to finished: " + e.getMessage()); }
break;
case "finOff": try {
System.out.println("Trying to setIcon on Instructions Button. File: com/dynastyaddons/updater/FinishedOff.png exists? " + new File("com/dynastyaddons/updater/FinishedOff.png").exists());
Image pic4 = ImageIO.read(Addons.class.getClassLoader().getResourceAsStream("com/dynastyaddons/updater/FinishedOff.png"));
icon = new ImageIcon(pic4);
finishedButton.setIcon(icon);
} catch (IOException e) { System.out.println("IO Exception setting icon to finished2: " + e.getMessage()); }
break;
case "instOn": try {
System.out.println("Trying to setIcon on Instructions Button. File: com/dynastyaddons/updater/InstallUpdatesON.png exists? " + new File("com/dynastyaddons/updater/InstallUpdatesON.png").exists());
Image pic5 = ImageIO.read(Addons.class.getClassLoader().getResourceAsStream("com/dynastyaddons/updater/InstallUpdatesON.png"));
icon = new ImageIcon(pic5);
installButton.setIcon(icon);
} catch (IOException e) { System.out.println("IO Exception setting icon to install: " + e.getMessage()); }
break;
case "instOff": try {
System.out.println("Trying to setIcon on Instructions Button. File: com/dynastyaddons/updater/InstallUpdatesOFF.png exists? " + new File("com/dynastyaddons/updater/InstallUpdatesOFF.png").exists());
Image pic6 = ImageIO.read(Addons.class.getClassLoader().getResourceAsStream("com/dynastyaddons/updater/InstallUpdatesOFF.png"));
icon = new ImageIcon(pic6);
installButton.setIcon(icon);
} catch (IOException e) { System.out.println("IO Exception setting icon to install2: " + e.getMessage()); }
break;
}
}
// This internal class will handle the modle for the table used to show the addon list.
class DynastyTableModel extends AbstractTableModel {
private String[] columnNames = {"Update",
"Name",
"Version",
"Purchase",
"Size"};
private Object[][] initialData = {
{new Boolean(false), "Booster", new Double(1.0), new Boolean(false), new Double(0)},
{new Boolean(false), "BoosterAlliance", new Double(1.0), new Boolean(false), new Double(0)},
{new Boolean(false), "BoosterHorde", new Double(1.0), new Boolean(false), new Double(0)},
{new Boolean(false), "Edge", new Double(1.0), new Boolean(false), new Double(0)},
{new Boolean(false), "Impulse", new Double(1.0), new Boolean(false), new Double(0)},
{new Boolean(false), "Tycoon", new Double(1.0), new Boolean(false), new Double(0)},
{new Boolean(false), "DynastyCore", new Double(1.0), new Boolean(false), new Double(0)},
};
public int getColumnCount() { return columnNames.length; }
public int getRowCount() { return initialData.length; }
public String getColumnName(int col) { return columnNames[col]; }
public Object getValueAt(int row, int col) { return initialData[row][col]; }
public Class getColumnClass(int c) { return getValueAt(0,c).getClass(); }
#Override
public void setValueAt(Object value, int row, int col) {
initialData[row][col] = value;
fireTableCellUpdated(row, col);
}
}
// This internal class will help handle when a row is selected in the table.
class SharedListSelectionHandler implements ListSelectionListener {
public void valueChanged(ListSelectionEvent e) {
if ( !e.getValueIsAdjusting() ) {
ListSelectionModel lsm = (ListSelectionModel)e.getSource();
int selected = lsm.getMinSelectionIndex();
// if purchased addon display patch notes
DynastyTableModel tm = (DynastyTableModel) addonsTable.getModel();
boolean selectedValue = (Boolean) tm.getValueAt(selected,3);
if ( selectedValue ) {
setPatchNotes(pNotes[selected][0]);
setImageOnButton("instructions");
}
else { // Otherwise update Install Instructions button to show Purchase instead.
// save currently selected addon name for use in the purchase button?
String p = "";
if (selected == 1 || selected == 2) {
p = "Booster";
} else { p = (String) tm.getValueAt(selected,1); }
setPatchNotes("<HTML>You have not purchased this addon, please go to http://dynastyaddons.com/" + p + " or click the Purchase button below the list of addons here to open the purchase page.</HTML>");
setImageOnButton("purchase");
}
}
}
}
}
As you see from the above code, the createGUI where I create the buttons using getResource() etc works fine, it's the setImagesOnButton() method at the bottom that's giving me fits.
I tried also to include the places where the method is called to make it more clear. Also the println's in the setImagesOnButton all print out that the file is found and exists, then in the next line a NullPointerException comes up saying it doesn't exist? Confusing to me.
OK, I figured out what was going on. Three things to fix this. First of all, I realized that the null problem was not the icon I was trying to put on the button, it was a misplaced JButton call at the top in the CreateGUI method. I removed that (since I had it already created in the constructor) and that went away. Second I got rid of the stupd method cause it kept confusing me. (the setImageOnButton) and finally I found that if I put the images directory in the root of the package, then called for the images using new ImageIcon(Image.read(getClass().getClassLoader().getResourceAsStream("images/imagename.png"))); I could find it since I was relating it to the package rather than the class, it worked like a charm! I compiled, jarred it up and tested on my wifes' computer and it worked perfect! Thank you all for the help, Couldn't have done it without all the great info! and to say the least, I completely understand resources and how to put them in an application and use them now. :)
I'm trying to update a button's font at regular intervals, and this is how I implement it.
Font font = buttons.getFont();
FontData[] fontData = font.getFontData();
for(int j = 0; j < fontData.length; ++j) {
fontData.setStyle(SWT.ITALIC | SWT.BOLD);
}
font = new Font(display, fontData);
buttons.setFont(font);
but doing this make the program crashed after some time with the exception
org.eclipse.swt.SWTError: No more handles
at org.eclipse.swt.SWT.error(SWT.java:4387)
at org.eclipse.swt.SWT.error(SWT.java:4276)
at org.eclipse.swt.SWT.error(SWT.java:4247)
at org.eclipse.swt.widgets.Display.error(Display.java:1258)
at org.eclipse.swt.widgets.Display.internal_new_GC(Display.java:2673)
at org.eclipse.swt.graphics.Device.computePoints(Device.java:241)
at org.eclipse.swt.graphics.Font.getFontData(Font.java:188)
My guess is that I've created many font objects without disposing them in time. but I have no idea how to dispose them correctly, can anyone help me with it? if my guess is wrong, pls tell me what's the true reason of the no handle exception?
try using getFont().dispose() and setFont() on button as,
final Font arialFont = new Font(Display.getCurrent(), "Arial", 40,
SWT.NORMAL);
final Font courierFont = new Font(Display.getCurrent(), "Courier New",
8, SWT.NORMAL);
final Button btn = new Button(parent, SWT.NONE);
btn.setText("New Text");
btn.setSize(100, 30);
btn.setFont(arialFont);
Button changeBtn = new Button(parent, SWT.NONE);
changeBtn.setText("Change Font");
changeBtn.setSize(100, 30);
changeBtn.addSelectionListener(new SelectionListener() {
#Override
public void widgetSelected(SelectionEvent arg0) {
count = count + 1;
if (count % 2 == 0) {
btn.getFont().dispose();
btn.setFont(arialFont);
} else {
btn.getFont().dispose();
btn.setFont(courierFont);
}
}
#Override
public void widgetDefaultSelected(SelectionEvent arg0) {
// TODO Auto-generated method stub
}
});
I have an application to show a image of the user's data. Where each user has more than 1 image data.
When I select the user in the JTable, my image data show in JPanel. The picture actually also JPanel with background image.
My question is, memory consumption always increases, and not reduce. Sometimes the application hangs.
How to register the picture(JPanel) to garbage collection. And if it possible, when i must to register them?
I am new in performance issue in Java.
This is my code :
public void getStreamData(final PanelEntry view, final String data) {
String files = null;
String path = null;
if(isImages()) {
path = "data/"+data+"/images";
} else {
path = "data/"+data+"/videos/thumbs";
}
File folder = new File(path);
// Always remove previous image label when new data selected
view.getPanelStream().removeAll();
if (!folder.exists()) {
JLabel label = new JLabel("No Stream Data");
label.setForeground(Color.red);
label.setVisible(true);
// Adding to panelGallery
view.getPanelStream().add(label);
view.getPanelStream().revalidate();
view.getPanelStream().repaint();
} else {
File [] listOfFiles = folder.listFiles();
int maxFiles = listOfFiles.length;
int maxView = 15;
// Loop for get image from file
for (int i = listOfFiles.length; i > 0 ; i--) {
if(listOfFiles[i].isFile()) {
files = listOfFiles[i].getName();
final String videoFiles = files;
if(files.endsWith(".jpg") || files.endsWith(".JPG") ||
files.endsWith(".jpeg") || files.endsWith(".JPEG") ||
files.endsWith(".png") || files.endsWith(".PNG")) {
final String newPath = path+"/"+files;
try {
File showFile = new File(newPath);
ImageIcon imgSource = new ImageIcon(newPath);
JPanel labelGallery = new BackgroundImageRounded(showFile);
labelGallery.setLayout(null);
labelGallery.setPreferredSize(new Dimension(160, 120));
labelGallery.setVisible(true);
JLabel labelName = new JLabel(files);
labelName.setSize(150,15);
labelName.setLocation(8, 8);
labelName.setVisible(true);
labelName.setForeground(Color.ORANGE);
labelGallery.add(labelName);
String videoPath = "data/"+data+"/videos/";
String video = videoFiles.replace(".jpg", ".wmv");
String videoFile = video.replace("thumb_", "video_");
final String videoPlayer = videoPath+videoFile;
if (isImages()) {
labelGallery.setToolTipText("View Image");
} else {
labelGallery.setToolTipText("Play Video");
JLabel iconPlayer = new JLabel();
iconPlayer.setIcon(new ImageIcon(getClass().getResource("/com/ikbiz/gastroscope/resources/player.png")));
iconPlayer.setSize(61,42);
iconPlayer.setVisible(true);
iconPlayer.setLocation(50, 35);
labelGallery.add(iconPlayer);
}
labelGallery.addMouseListener(new MouseAdapter() {
#Override
public void mouseClicked(MouseEvent e) {
if(isImages()) {
ImageViewer viewer = new ImageViewer(newPath);
viewer.setVisible(true);
} else {
VideoViewer videoViewer = new VideoViewer();
videoViewer.setViewer(videoPlayer);
videoViewer.setLocationRelativeTo(null);
videoViewer.pack();
videoViewer.setVisible(true);
}
}
});
// Adding to panelGallery
view.getPanelStream().add(labelGallery);
view.getPanelStream().revalidate();
view.getPanelStream().repaint();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
}
}
Please help,
Thank you.
You should use a memory profiler to find out what is going on.
Here, you talk about registering the JPanel, but how are you 100% sure that this is the kind of objects that consume memory ?
I think you should :
Profile your heap utilization
Find out the objects that consume a lot of memory
Find where they are instantiated
Find out why they are not reclaimed by the GC (what are the GC roots that links to them)
Without more information, you are just guessing that some portion of your code must be the culprit, but you do not have a clue.
I want to build a user interface similar to the sketch below:
When the user fills out the form on the right and clicks the 'Plot!' button, a new closeable tab opens on the left with a chart.
I am new to RCP and have been following this tutorial. I am able to bring up tabs with charts triggered from a menu item. How do I go about:
creating the tab (view?) with the form
open a new chart tab when the user clicks the button
Edit
Here is my current code. It satisfies the basic requirements outlined in this question, but I am not sure if that is the best approach. I would be delighted if someone here can guide me in the right direction.
A view with the form; the button's listener invokes a command.
public class FormView extends ViewPart {
public static final String ID =
FormView.class.getPackage().getName() + ".Form";
private FormToolkit toolkit;
private Form form;
public Text text;
#Override
public void createPartControl(Composite parent) {
toolkit = new FormToolkit(parent.getDisplay());
form = toolkit.createForm(parent);
form.setText("Pie Chucker");
GridLayout layout = new GridLayout();
form.getBody().setLayout(layout);
layout.numColumns = 2;
GridData gd = new GridData();
gd.horizontalSpan = 2;
Label label = new Label(form.getBody(), SWT.NULL);
label.setText("Chart Title:");
text = new Text(form.getBody(), SWT.BORDER);
text.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
Button button = new Button(form.getBody(), SWT.PUSH);
button.setText("Plot");
gd = new GridData();
gd.horizontalSpan = 2;
button.setLayoutData(gd);
button.addMouseListener(new MouseAdapter() {
#Override
public void mouseDown(MouseEvent e) {
IHandlerService handlerService = (IHandlerService) getSite()
.getService(IHandlerService.class);
try {
handlerService.executeCommand(ShowChartHandler.ID, null);
} catch (Exception ex) {
throw new RuntimeException(ShowChartHandler.ID +
" not found");
}
}
});
}
#Override
public void setFocus() {
}
}
The command invoked by the button from the form. This opens a new view with a chart.
public class ShowChartHandler extends AbstractHandler implements IHandler {
public static final String ID =
ShowChartHandler.class.getPackage().getName() + ".ShowChart";
private int count = 0;
#Override
public Object execute(ExecutionEvent event) throws ExecutionException {
IWorkbenchWindow window = HandlerUtil.getActiveWorkbenchWindow(event);
try {
window.getActivePage().showView(ChartView.ID,
String.valueOf(++count), IWorkbenchPage.VIEW_ACTIVATE);
} catch (PartInitException e) {
e.printStackTrace();
}
return null;
}
}
The view with the chart. It looks up the form view and reads a value from a text field in the form (?!):
public class ChartView extends ViewPart {
public static final String ID =
ChartView.class.getPackage().getName() + ".Chart";
private static final Random random = new Random();
public ChartView() {
// TODO Auto-generated constructor stub
}
#Override
public void createPartControl(Composite parent) {
FormView form =
(FormView) Workbench.getInstance()
.getActiveWorkbenchWindow()
.getActivePage()
.findView(FormView.ID);
String title = form == null? null : form.text.getText();
if (title == null || title.trim().length() == 0) {
title = "Pie Chart";
}
setPartName(title);
JFreeChart chart = createChart(createDataset(), title);
new ChartComposite(parent, SWT.NONE, chart, true);
}
#Override
public void setFocus() {
// TODO Auto-generated method stub
}
/**
* Creates the Dataset for the Pie chart
*/
private PieDataset createDataset() {
Double[] nums = getRandomNumbers();
DefaultPieDataset dataset = new DefaultPieDataset();
dataset.setValue("One", nums[0]);
dataset.setValue("Two", nums[1]);
dataset.setValue("Three", nums[2]);
dataset.setValue("Four", nums[3]);
dataset.setValue("Five", nums[4]);
dataset.setValue("Six", nums[5]);
return dataset;
}
private Double[] getRandomNumbers() {
Double[] nums = new Double[6];
int sum = 0;
for (int i = 0; i < 5; i++) {
int r = random.nextInt(20);
nums[i] = new Double(r);
sum += r;
}
nums[5] = new Double(100 - sum);
return nums;
}
/**
* Creates the Chart based on a dataset
*/
private JFreeChart createChart(PieDataset dataset, String title) {
JFreeChart chart = ChartFactory.createPieChart(title, // chart title
dataset, // data
true, // include legend
true, false);
PiePlot plot = (PiePlot) chart.getPlot();
plot.setSectionOutlinesVisible(false);
plot.setLabelFont(new Font("SansSerif", Font.PLAIN, 12));
plot.setNoDataMessage("No data available");
plot.setCircular(false);
plot.setLabelGap(0.02);
return chart;
}
}
The perspective that ties it all together:
public class Perspective implements IPerspectiveFactory {
public void createInitialLayout(IPageLayout layout) {
layout.setEditorAreaVisible(false);
layout.addStandaloneView(FormView.ID, false,
IPageLayout.RIGHT, 0.3f,
IPageLayout.ID_EDITOR_AREA);
IFolderLayout charts = layout.createFolder("Charts",
IPageLayout.LEFT, 0.7f, FormView.ID);
charts.addPlaceholder(ChartView.ID + ":*");
}
}
I would recommend a different aproach. Eclipse has viewparts (views) and editors. It is easy to open multiple editors. Views are not so much for open multiple ones.
So my suggestion is, that you implement the part you call "FormView" as a StandAloneView and implement the "ChartView" as an editor.
I would also recommend to use a different listener for the button, so also the code will be executed when using the keyboard to click the button.
My proposal:
public class FormView extends ViewPart {
...
button.addSelectionListener(new SelectionAdapter() {
#Override
public void widgetSelected(SelectionEvent e) {
// this below can also be called by a command but you need to take care about the data, which the user put into the fields in different way.
Shell shell = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell();
IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
IWorkbenchPage page = window.getActivePage();
ChartEditorInput input = new ChartEditorInput(text.getText(),...<other data you need to pass>);
try {
page.openEditor(input, ChartEditor.ID);
} catch (PartInitException e) {
e.printStackTrace();
}
}
});
ChartView needs to be changed to ChartEditor. See here http://www.vogella.de/articles/RichClientPlatform/article.html#editor_editorinput how that is done.
ChartEditorInput hereby is a class you need to implement aside the editor class, which holds the data.
In your perspective you call:
public void createInitialLayout(IPageLayout layout) {
String editorArea = layout.getEditorArea();
layout.setFixed(false);
layout.setEditorAreaVisible(true);
layout.addStandaloneView("your.domain.and.FormView", true,IPageLayout.RIGHT, 0.15f, editorArea);
Hope this helps!