I'm drawing a Bitmap as a background for a custom field but it doesn't draw the bitmap in the entire field's area. I've resized the image too but it always leaves out some space to the right and bottom. This is what it looks like:
Here's some code for painting:
public int getPreferredWidth(){
return phoneWidth;
}
public int getPreferredHeight(){
return cellHeight;
}
protected void paint(Graphics g) {
Bitmap img = Bitmap.getBitmapResource("cell_bg.png");
img.scaleInto(new Bitmap(phoneWidth, cellHeight), Bitmap.SCALE_TO_FIT);//or other scaling methods
g.drawBitmap(0, 0, phoneWidth, cellHeight, img, 0, 0);//draw background
//other steps
}
It works fine if I set the Background as follows-
Background bg = BackgroundFactory.createBitmapBackground(Bitmap.getBitmapResource("cell_bg.png"),0,0,Background.REPEAT_SCALE_TO_FIT);
this.setBackground(bg);
but this way, the background image is not visible onFocus.
What am I doing wrong here?
The problem here is you've used scaleInto() incorrectly.
Try it like this:
Bitmap img = Bitmap.getBitmapResource("cell_bg.png");
Bitmap scaled = new Bitmap(phoneWidth, cellHeight);
img.scaleInto(scaled, Bitmap.SCALE_TO_FIT);//or other scaling methods
g.drawBitmap(0, 0, phoneWidth, cellHeight, scaled, 0, 0);// here draw the scaled image(You here draw the old one)
the scaled bitmap image is given as output, NOT the original image .
create an encoded image then pass this encoded image to function scaleImage()
EncodedImage ei = EncodedImage.getEncodedImageResource("res/helpscreen.png");
EncodedImage ei1= scaleImage(ei,Graphics.getScreenWidth(),Graphics.getScreenHeight());
public EncodedImage scaleImage(EncodedImage source, int requiredWidth, int requiredHeight)
{
int currentWidthFixed32 = Fixed32.toFP(source.getWidth());
int requiredWidthFixed32 = Fixed32.toFP(requiredWidth);
int scaleXFixed32 = Fixed32.div(currentWidthFixed32, requiredWidthFixed32);
int currentHeightFixed32 = Fixed32.toFP(source.getHeight());
int requiredHeightFixed32 = Fixed32.toFP(requiredHeight);
int scaleYFixed32 = Fixed32.div(currentHeightFixed32, requiredHeightFixed32);
return source.scaleImage32(scaleXFixed32, scaleYFixed32);
}
then get this bitmap
BitmapField logoBitmap = new BitmapField(ei1.getBitmap());
Use this method to scale the image in your code:
private Bitmap getScaledBitmap(String imageName, int width, int height)
{
try {
EncodedImage image = EncodedImage.getEncodedImageResource(imageName);
int currentWidthFixed32 = Fixed32.toFP(image.getWidth());
int currentHeightFixed32 = Fixed32.toFP(image.getHeight());
int requiredWidthFixed32 = Fixed32.toFP(width);
int requiredHeightFixed32 = Fixed32.toFP(height);
int scaleXFixed32 = Fixed32.div(currentWidthFixed32, requiredWidthFixed32);
int scaleYFixed32 = Fixed32.div(currentHeightFixed32, requiredHeightFixed32);
image = image.scaleImage32(scaleXFixed32, scaleYFixed32);
return image.getBitmap();
} catch(Exception e) {
return null; // unable to resize the image
}
}
Related
I am developing an application which requires me to create a progress bar moving from right to left.
I tried using GaugeField by filling startVal as 100 and then on decrementing it but I couldn't achieve it.
Is there any way in BlackBerry say paint() method or drawRect() using timer where we can fill it from right to left?
Check following code for an implementation of Custom GaugeField.
Output
Implementation of CustomGaugeField
class CustomGaugeField extends GaugeField {
// Default constructor, need improvement
public CustomGaugeField() {
super("", 0, 100, 0, GaugeField.PERCENT);
}
// Colors
private static final int BG_COLOR = 0xd6d7d6;
private static final int BAR_COLOR = 0x63cb52;
private static final int FONT_COLOR = 0x5a55c6;
protected void paint(Graphics graphics) {
int xProgress = (int) ((getWidth() / 100.0) * getValue());
int xProgressInv = getWidth() - xProgress;
// draw background
graphics.setBackgroundColor(BG_COLOR);
graphics.clear();
// draw progress bar
graphics.setColor(BAR_COLOR);
graphics.fillRect(xProgressInv, 0, xProgress, getHeight());
// draw progress indicator text
String text = getValue() + "%";
Font font = graphics.getFont();
int xText = (getWidth() - font.getAdvance(text)) / 2;
int yText = (getHeight() - font.getHeight()) / 2;
graphics.setColor(FONT_COLOR);
graphics.drawText(text, xText, yText);
}
}
How to use
class MyScreen extends MainScreen {
public MyScreen() {
setTitle("Custom GaugeField Demo");
GaugeField gField;
for (int i = 0; i < 6; i++) {
gField = new CustomGaugeField();
gField.setMargin(10, 10, 10, 10);
add(gField);
}
startProgressTimer();
}
private void startProgressTimer() {
TimerTask ttask = new TimerTask() {
public void run() {
Field f;
for (int i = 0; i < getFieldCount(); i++) {
f = getField(i);
if (f instanceof CustomGaugeField) {
final CustomGaugeField gField = (CustomGaugeField) f;
final int increment = (i + 1) * 2;
UiApplication.getUiApplication().invokeLater(
new Runnable() {
public void run() {
gField.setValue((gField.getValue() + increment) % 101);
}
}
);
}
}
}
};
Timer ttimer = new Timer();
ttimer.schedule(ttask, 1000, 300);
}
}
Here is what I recommend you do. Download the BlackBerry Advanced UI Samples ... select the Download as Zip button.
Take a look at some screenshots of what the samples have here. The one you need to use is the Bitmap Gauge Field:
What you can do is modify the BitmapGaugeField class that they have in the sample folder, under Advanced UI -> src/com/samples/toolkit/ui/component
In BitmapGaugeField.java, you will only need to change the drawHorizontalPill() method:
private void drawHorizontalPill( Graphics g, Bitmap baseImage, Bitmap centerTile, int clipLeft, int clipRight, int width )
{
int yPosition = ( _height - baseImage.getHeight() ) >> 1;
width = Math.max( width, clipLeft + clipRight );
// ORIGINAL IMPLEMENTATION COMMENTED OUT HERE:
// Left
//g.drawBitmap( 0, yPosition, clipLeft, baseImage.getHeight(), baseImage, 0, 0);
// Middle
//g.tileRop( _rop, clipLeft, yPosition, Math.max( 0, width - clipLeft - clipRight ), centerTile.getHeight(), centerTile, 0, 0);
// Right
//g.drawBitmap( width - clipRight, yPosition, clipRight, baseImage.getHeight(), baseImage, baseImage.getWidth() - clipRight, 0);
int offset = _width - width;
// Left
g.drawBitmap( 0 + offset, yPosition, clipLeft, baseImage.getHeight(), baseImage, 0, 0);
// Middle
g.tileRop( _rop, clipLeft + offset, yPosition, Math.max( 0, width - clipLeft - clipRight ), centerTile.getHeight(), centerTile, 0, 0);
// Right
g.drawBitmap( width - clipRight + offset, yPosition, clipRight, baseImage.getHeight(), baseImage, baseImage.getWidth() - clipRight, 0);
}
The way you use this class is to pass in values for the background, and foreground (fill) stretchable bitmaps, the range of values, initial value, and some clipping margins.
public BitmapGaugeField(
Bitmap background, /** bitmap to draw for gauge background */
Bitmap progress, /** bitmap to draw for gauge foreground */
int numValues, /** this is the discrete range, not including 0 */
int initialValue,
int leadingBackgroundClip,
int trailingBackgroundClip,
int leadingProgressClip,
int trailingProgressClip,
boolean horizontal ) /** it looks like you could even do vertical! */
An example, if you want this gauge to go from 0 to 100, and have an initial value of 30 (this code goes in a Manager class):
Bitmap gaugeBack3 = Bitmap.getBitmapResource( "gauge_back_3.png" );
Bitmap gaugeProgress3 = Bitmap.getBitmapResource( "gauge_progress_3.png" );
BitmapGaugeField bitGauge3 = new BitmapGaugeField( gaugeBack3, gaugeProgress3,
100, 30,
14, 14, 14, 14,
true );
bitGauge3.setPadding(15,5,15,5);
add(bitGauge3);
bitGauge3.setValue(80); // change the initial value from 30 to 80
You'll find in the project some PNG images, like gauge_back_3.png and gauge_progress_3.png. If you don't like the colors or shapes, you can swap those images out for ones you draw yourself (in Photoshop, or another drawing program).
Good luck!
I just want to know how can I change ListField's item background color. I have two items in my ListField like this one.
|First One|Second One.................|
I need to change first one's background color.
My drawListRow(..) method looks like this
public void drawListRow(ListField listField, Graphics graphics,
int index, int y, int width) {
int oldColor = 0;
try {
oldColor = graphics.getColor();
String txt = (vector.elementAt(index)).toString();
int xPos = 15;
int yPos = 5 + y;
//graphics.clear();
graphics.setColor(Color.GREEN);
graphics.fillRect(0, y, (Display.getWidth()*10/100), yPos);
graphics.drawText(txt, xPos, yPos);
//graphics.fillRect(0,(index*Display.getHeight()/10),Display.getWidth(),Display.getHeight()/10);
} finally {
graphics.setColor(oldColor);
}
}
But this is not working.
Though you have attached an image, I am still confused. The image didn't answer some question, for example, how it will look on a row get focused (I didn't understand actually).
But you can check following output and code. I think you can customize the look as you wish if you check the code.
Generated Output
How to use
public class MyScreen extends MainScreen {
private Vector listElements;
public MyScreen() {
setTitle("Custom ListField Demo");
// data for the ListField
listElements = new Vector();
for (int i = 0; i < 4; i++) {
listElements.addElement("Some text for row " + i);
}
ListField taskList = new ListField() {
// disable default focus drawing
protected void drawFocus(Graphics graphics, boolean on) {
};
};
taskList.setCallback(new ListCallback(listElements));
taskList.setSize(listElements.size());
taskList.setRowHeight(40);
add(taskList);
}
}
ListCallback implementation
class ListCallback implements ListFieldCallback {
final int COLOR_INDEX_NORMAL_BG = 0x1D6789;
final int COLOR_INDEX_FOCUSED_BG = 0x0E8CB3;
final int COLOR_NORMAL_BG = 0x2A2A2A;
final int COLOR_FOCUSED_BG = 0x1F1F1F;
private Vector listElements;
public ListCallback(Vector listElements) {
this.listElements = listElements;
}
public void drawListRow(ListField list, Graphics graphics, int index, int y,
int width) {
int rowHeight = list.getRowHeight(index);
boolean isSelectedRow = (list.getSelectedIndex() == index);
int indexBgColor = isSelectedRow ? COLOR_INDEX_FOCUSED_BG : COLOR_INDEX_NORMAL_BG;
int rowBgColor = isSelectedRow ? COLOR_FOCUSED_BG : COLOR_NORMAL_BG;
final int indexWidth = width / 10;
// draw row background
fillRectangle(graphics, rowBgColor, 0, y, width, rowHeight);
// draw index background
fillRectangle(graphics, indexBgColor, 0, y, indexWidth, rowHeight);
// set text color, draw text
Font font = list.getFont();
graphics.setColor(Color.WHITE );
graphics.setFont(font);
String indexText = "" + (index + 1);
String textToDraw = "";
try {
textToDraw = (String) listElements.elementAt(index);
} catch (Exception exc) {
}
int xText = (indexWidth - font.getAdvance(indexText)) / 2;
int yText = (rowHeight - font.getHeight()) / 2;
graphics.drawText(indexText, xText, y + yText, 0, indexWidth);
final int margin = 5;
int availableWidth = (width - indexWidth) - 2 * margin;
xText = indexWidth + margin;
yText = (rowHeight - font.getHeight()) / 2;
graphics.drawText(textToDraw, xText, y + yText, DrawStyle.ELLIPSIS, availableWidth);
}
private void fillRectangle(Graphics graphics, int color, int x, int y, int width, int height) {
graphics.setColor(color);
graphics.fillRect(x, y, width, height);
}
public Object get(ListField list, int index) {
// not implemented
return "";
}
public int indexOfList(ListField list, String prefix, int string) {
// not implemented
return 0;
}
public int getPreferredWidth(ListField list) {
return Display.getWidth();
}
}
If you need to change onFocus Background color than add drwFocus method on your ListField.
protected void drawFocus(Graphics graphics, boolean on) {
//get the focus rect area
XYRect focusRect = new XYRect();
getFocusRect(focusRect);
boolean oldDrawStyleFocus = graphics.isDrawingStyleSet(Graphics.DRAWSTYLE_FOCUS);
try {
if (on) {
//set the style so the fields in the row will update its color accordingly
graphics.setDrawingStyle(Graphics.DRAWSTYLE_FOCUS, true);
int oldColour = graphics.getColor();
try {
graphics.setColor(0xc8d3db); //set the color and draw the color
graphics.fillRect(focusRect.x, focusRect.y,
focusRect.width, focusRect.height);
} finally {
graphics.setColor(oldColour);
}
//to draw the row again
drawListRow(this, graphics, getSelectedIndex(),
focusRect.y, focusRect.width);
// drawRow(graphics, focusRect.x,focusRect.y, focusRect.width,focusRect.height);
}
} finally {
graphics.setDrawingStyle(Graphics.DRAWSTYLE_FOCUS, oldDrawStyleFocus);
}
}
Check the edited answer,
protected void drawFocus(Graphics graphics, boolean on) {
XYRect focusRect = new XYRect();
getFocusRect(focusRect);
boolean oldDrawStyleFocus = graphics.isDrawingStyleSet(Graphics.DRAWSTYLE_FOCUS);
try {
if (on) {
graphics.setDrawingStyle(Graphics.DRAWSTYLE_FOCUS, true);
int oldColour = Color.BLACK;
try {
graphics.fillRect(focusRect.x, focusRect.y,
focusRect.width, focusRect.height);
} finally {
graphics.setColor(oldColour);
}
//to draw the row again
drawListRow(this, graphics, getSelectedIndex(),
focusRect.y, focusRect.width);
}
} finally {
graphics.setDrawingStyle(Graphics.DRAWSTYLE_FOCUS, oldDrawStyleFocus);
}
}
I want to show a image from the SD card in a BitmapField. How to do that? Can anyone give me some sample code for that?
This may be Help full.
public Bitmap getImage(){
Bitmap bitmapImage=null;
try{
InputStream input;
FileConnection fconn = (FileConnection) Connector.open("file:///store/home/user/dirname/imgname.png", Connector.READ_WRITE);
input = fconn.openInputStream();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int j = 0;
while((j=input.read()) != -1) {
baos.write(j);
}
byte[] byteArray = baos.toByteArray();
bitmapImage = Bitmap.createBitmapFromBytes(byteArray,0,byteArray.length,1);
}catch(Exception ioe){
System.out.println(ioe);
}
return bitmapImage;
}
Enjoy..
Hi Guys above code is useful for BB OS >= 5.0
I'm using a code which can used for OS 4.2 or higher.
private Bitmap resizeBitmap(Bitmap image, int width, int height)
{
int rgb[] = new int[image.getWidth()*image.getHeight()];
image.getARGB(rgb, 0, image.getWidth(), 0, 0, image.getWidth(), image.getHeight());
int rgb2[] = rescaleArray(rgb, image.getWidth(), image.getHeight(), width, height);
Bitmap temp2 = new Bitmap(width, height);
temp2.setARGB(rgb2, 0, width, 0, 0, width, height);
return temp2;
}
private int[] rescaleArray(int[] ini, int x, int y, int x2, int y2)
{
int out[] = new int[x2*y2];
for (int yy = 0; yy < y2; yy++)
{
int dy = yy * y / y2;
for (int xx = 0; xx < x2; xx++)
{
int dx = xx * x / x2;
out[(x2 * yy) + xx] = ini[(x * dy) + dx];
}
}
return out;
}
Try this sample code:
public class LoadingScreen extends MainScreen implements FieldChangeListener
{
private VerticalFieldManager ver;
private ButtonField showImage;
private BitmapField bitmapField;
public LoadingScreen()
{
ver=new VerticalFieldManager(USE_ALL_WIDTH);
showImage=new ButtonField("Show Image",Field.FIELD_HCENTER);
showImage.setChangeListener(this);
ver.add(showImage);
bitmapField=new BitmapField(null,Field.FIELD_HCENTER);
bitmapField.setPadding(10, 0, 10, 0);
ver.add(bitmapField);
add(ver);
}
public void fieldChanged(Field field, int context)
{
if(field==showImage)
{
selectImageFromSDCARD();
}
}
private void selectImageFromSDCARD()
{
String PATH="";
if(SDCardTest.isSDCardAvailable())//sdcard available then
PATH = System.getProperty("fileconn.dir.memorycard.photos");//The default stored Images Path;
else
PATH = System.getProperty("fileconn.dir.photos");//The default stored Images Path;
FilePicker filePicker=FilePicker.getInstance();
filePicker.setPath(PATH);
filePicker.setListener(new Listener()
{
public void selectionDone(String url)
{
System.out.println("======================URL: "+url);
try
{
FileConnection file = (FileConnection)Connector.open(url);
if(file.exists())
{
InputStream inputStream = file.openInputStream();
byte[] data=new byte[inputStream.available()];
data=IOUtilities.streamToBytes(inputStream);
Bitmap bitmap=Bitmap.createBitmapFromBytes(data, 0, data.length,1);//Here we get the Image;
Bitmap scaleBitmap=new Bitmap(400, 300);//Now we are scaling that image;
bitmap.scaleInto(scaleBitmap, Bitmap.FILTER_LANCZOS);
bitmapField.setBitmap(scaleBitmap);
}
else
{
bitmapField.setBitmap(Bitmap.getBitmapResource("icon.png"));
}
}
catch (IOException e)
{
bitmapField.setBitmap(Bitmap.getBitmapResource("icon.png"));
}
}
});
filePicker.show();
}
protected boolean onSavePrompt() //It doesn't show the "Save","Discard","Cancel" POPUP;
{
return true;
}
public boolean onMenu(int instance) //It doesn't show the Menu;
{
return true;
}
}
If you have any doubts refer this Blog: Get Image From SDcard
i want to set background image in Vertical field manager. i had try but it not fill with height you can see that in my screen. and Following in my code what i am doing mistake please help me.
vfmCenter = new VerticalFieldManager(FIELD_HCENTER)
{
public void paint(Graphics graphics)
{
graphics.clear();
graphics.drawBitmap(0, 0,deviceWidth,deviceHeight,newimg,0,0);
super.paint(graphics);
}
protected void sublayout( int maxWidth, int maxHeight)
{
int width = Display.getWidth();
int height = Display.getHeight();
super.sublayout( width, height);
setExtent( width, height);
}
};
vfmMain.add(vfmCenter);
this.add(vfmMain);
I was also facing the same issue earlier.. I solved my problem with this..
class MyClass extends MainScreen
{
// function for scaling your image to fit the screen
public EncodedImage scaleImage(EncodedImage source, int requiredWidth, int requiredHeight)
{
int currentWidthFixed32 = Fixed32.toFP(source.getWidth());
int requiredWidthFixed32 = Fixed32.toFP(requiredWidth);
int scaleXFixed32 = Fixed32.div(currentWidthFixed32, requiredWidthFixed32);
int currentHeightFixed32 = Fixed32.toFP(source.getHeight());
int requiredHeightFixed32 = Fixed32.toFP(requiredHeight);
int scaleYFixed32 = Fixed32.div(currentHeightFixed32, requiredHeightFixed32);
return source.scaleImage32(scaleXFixed32, scaleYFixed32);
}
public MyClass
{
ei = EncodedImage.getEncodedImageResource("res/background_image");
ei1= scaleImage(ei,requires_width,required_height);
vfm= new VerticalFieldManager(VerticalFieldManager.USE_ALL_HEIGHT|VerticalFieldManager.USE_ALL_WIDTH);
vfm.setBackground(BackgroundFactory.createBitmapBackground(ei1.getBitmap()));
vfm.add(new LabelField("hello notice the background behind me");
add(vfm);
}
}
Try this. I think it will work for you!!
Try like this:
VerticalFieldManager vertical=new VerticalFieldManager()
{
protected void paint(Graphics g)
{
g.drawBitmap(0, 0,Display.getWidth(), Display.getHeight(), bitmap, 0, 0);
super.paint(g);
}
protected void sublayout(int maxWidth, int maxHeight)
{
super.sublayout(Display.getWidth(),Display.getHeight());
setExtent(Display.getWidth(),Display.getHeight());
}
};
add(vertical);
you can get.
This is the simple using getMainManager but whole background not a particular Field Manager
getMainManager().setBackground(BackgroundFactory.createBitmapBackground(Bitmap.getBitmapResource("sample.png")));
How can I re-size the image stored in resource folder using code according to the display width and height of blackberry screen?
Firstly create a encoded image like this
EncodedImage ei = EncodedImage.getEncodedImageResource("res/helpscreen.png");
then pass this encoded image to the below function
EncodedImage ei1= scaleImage(ei,reqWidth,requiredHeight);
public EncodedImage scaleImage(EncodedImage source, int requiredWidth, int requiredHeight)
{
int currentWidthFixed32 = Fixed32.toFP(source.getWidth());
int requiredWidthFixed32 = Fixed32.toFP(requiredWidth);
int scaleXFixed32 = Fixed32.div(currentWidthFixed32, requiredWidthFixed32);
int currentHeightFixed32 = Fixed32.toFP(source.getHeight());
int requiredHeightFixed32 = Fixed32.toFP(requiredHeight);
int scaleYFixed32 = Fixed32.div(currentHeightFixed32, requiredHeightFixed32);
return source.scaleImage32(scaleXFixed32, scaleYFixed32);
}
this will give you a encoded image. then convert it to Bitmap using
BitmapField logoBitmap = new BitmapField(ei1.getBitmap());
To scale a Bitmap image try Bitmap.scaleInto(...). API Link.
Bitmap targetBm = new Bitmap(Display.getWidth(), Display.getHeight());
srcBitmap.scaleInto(targetBm, Bitmap.FILTER_BILINEAR, Bitmap.SCALE_STRETCH);