[android-developers] Re: weird drawing on bitmap to canvas
Try using the following:
Rect bounds = new Rect();
mFontPaint.getTextBounds(mText, 0, mText.length(), bounds);
mCanvasBitmap.drawText(mText, 0, bounds.height(), mFontPaint);
On Jun 25, 1:20 am, sleith wrote:
> thx for reply
> did u mean font's paint?
> i believe it's not that the font is cannot be drawn.
> i think it's the position of the position 0,0 of the bitmap is not
> really 0,0 (it's out of bounds)
> because when i move the position of bitmap (bitmap.translate) with
> some x and y, i could see the text and text background is drawn.
>
> On Jun 24, 11:22 pm, MrChaz wrote:
>
>
>
> > setTextSize() and setStyle() need to be called on the Paint object I
> > think.
>
> > On Jun 23, 4:37 pm, sleith wrote:
>
> > > hi, i'm trying to draw bitmap in canvas.
> > > the bitmap is used to draw text and background using canvas (named
> > > canvasBitmap)
> > > but the text or background that are drown to bitmap is not displayed,
> > > as if it's out of bounds.
> > > i have to translate the canvasBitmap at some points to make it draw at
> > > right position.
> > > The problem is i don't know how many pixel i should translate to.
>
> > > here's the code example:
>
> > > public OnDraw(Canvas c){
>
> > > Paint mBackgroundPaint = new Paint();
> > > mBackgroundPaint.setColor(Color.RED);
>
> > > String mText = "Testing";
>
> > > Paint mFontPaint = new Paint();
> > > mFontPaint.setColor(Color.WHITE);
>
> > > //setting rect
> > > Rect mBackgroundRect = new Rect();
> > > mFontPaint.getTextBounds(mText, 0, mText.length(), mBackgroundRect);
>
> > > //the bitmap to be drawn a text and backgroundRect
> > > Bitmap mBitmap = Bitmap.createBitmap(mBackgroundRect.width(),
> > > mBackgroundRect.height(),
> > > Bitmap.Config.ARGB_);
> > > Canvas mCanvasBitmap = new Canvas(mBitmap);
>
> > > //draw text and background to bitmap
> > > mCanvasBitmap.drawColor(Color.CYAN);
> > > mCanvasBitmap.drawRect(mBackgroundRect, mBackgroundPaint);
> > > mCanvasBitmap.drawText(mText, 0, 0, mFontPaint);
>
> > > //draw bitmap to canvas
> > > c.drawBitmap(mBitmap, 0, 0, null);
>
> > > }
>
> > > this will only drawn Cyan color, the text and red background is not
> > > displayed
> > > i have to translate for example :
> > > mCanvasBitmap.translate(0, mBackgroundRect.height())
>
> > > to make it displayed (but not 100% correctly position)
> > > please help >.<
> > > thx
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[android-developers] Re: weird drawing on bitmap to canvas
thx for reply
did u mean font's paint?
i believe it's not that the font is cannot be drawn.
i think it's the position of the position 0,0 of the bitmap is not
really 0,0 (it's out of bounds)
because when i move the position of bitmap (bitmap.translate) with
some x and y, i could see the text and text background is drawn.
On Jun 24, 11:22 pm, MrChaz wrote:
> setTextSize() and setStyle() need to be called on the Paint object I
> think.
>
> On Jun 23, 4:37 pm, sleith wrote:
>
> > hi, i'm trying to draw bitmap in canvas.
> > the bitmap is used to draw text and background using canvas (named
> > canvasBitmap)
> > but the text or background that are drown to bitmap is not displayed,
> > as if it's out of bounds.
> > i have to translate the canvasBitmap at some points to make it draw at
> > right position.
> > The problem is i don't know how many pixel i should translate to.
>
> > here's the code example:
>
> > public OnDraw(Canvas c){
>
> > Paint mBackgroundPaint = new Paint();
> > mBackgroundPaint.setColor(Color.RED);
>
> > String mText = "Testing";
>
> > Paint mFontPaint = new Paint();
> > mFontPaint.setColor(Color.WHITE);
>
> > //setting rect
> > Rect mBackgroundRect = new Rect();
> > mFontPaint.getTextBounds(mText, 0, mText.length(), mBackgroundRect);
>
> > //the bitmap to be drawn a text and backgroundRect
> > Bitmap mBitmap = Bitmap.createBitmap(mBackgroundRect.width(),
> > mBackgroundRect.height(),
> > Bitmap.Config.ARGB_);
> > Canvas mCanvasBitmap = new Canvas(mBitmap);
>
> > //draw text and background to bitmap
> > mCanvasBitmap.drawColor(Color.CYAN);
> > mCanvasBitmap.drawRect(mBackgroundRect, mBackgroundPaint);
> > mCanvasBitmap.drawText(mText, 0, 0, mFontPaint);
>
> > //draw bitmap to canvas
> > c.drawBitmap(mBitmap, 0, 0, null);
>
> > }
>
> > this will only drawn Cyan color, the text and red background is not
> > displayed
> > i have to translate for example :
> > mCanvasBitmap.translate(0, mBackgroundRect.height())
>
> > to make it displayed (but not 100% correctly position)
> > please help >.<
> > thx
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[android-developers] Re: weird drawing on bitmap to canvas
setTextSize() and setStyle() need to be called on the Paint object I
think.
On Jun 23, 4:37 pm, sleith wrote:
> hi, i'm trying to draw bitmap in canvas.
> the bitmap is used to draw text and background using canvas (named
> canvasBitmap)
> but the text or background that are drown to bitmap is not displayed,
> as if it's out of bounds.
> i have to translate the canvasBitmap at some points to make it draw at
> right position.
> The problem is i don't know how many pixel i should translate to.
>
> here's the code example:
>
> public OnDraw(Canvas c){
>
> Paint mBackgroundPaint = new Paint();
> mBackgroundPaint.setColor(Color.RED);
>
> String mText = "Testing";
>
> Paint mFontPaint = new Paint();
> mFontPaint.setColor(Color.WHITE);
>
> //setting rect
> Rect mBackgroundRect = new Rect();
> mFontPaint.getTextBounds(mText, 0, mText.length(), mBackgroundRect);
>
> //the bitmap to be drawn a text and backgroundRect
> Bitmap mBitmap = Bitmap.createBitmap(mBackgroundRect.width(),
> mBackgroundRect.height(),
> Bitmap.Config.ARGB_);
> Canvas mCanvasBitmap = new Canvas(mBitmap);
>
> //draw text and background to bitmap
> mCanvasBitmap.drawColor(Color.CYAN);
> mCanvasBitmap.drawRect(mBackgroundRect, mBackgroundPaint);
> mCanvasBitmap.drawText(mText, 0, 0, mFontPaint);
>
> //draw bitmap to canvas
> c.drawBitmap(mBitmap, 0, 0, null);
>
> }
>
> this will only drawn Cyan color, the text and red background is not
> displayed
> i have to translate for example :
> mCanvasBitmap.translate(0, mBackgroundRect.height())
>
> to make it displayed (but not 100% correctly position)
> please help >.<
> thx
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[android-developers] Re: weird drawing on bitmap to canvas
hello...could anyone help?
thx
On Jun 23, 10:37 pm, sleith wrote:
> hi, i'm trying to draw bitmap in canvas.
> the bitmap is used to draw text and background using canvas (named
> canvasBitmap)
> but the text or background that are drown to bitmap is not displayed,
> as if it's out of bounds.
> i have to translate the canvasBitmap at some points to make it draw at
> right position.
> The problem is i don't know how many pixel i should translate to.
>
> here's the code example:
>
> public OnDraw(Canvas c){
>
> Paint mBackgroundPaint = new Paint();
> mBackgroundPaint.setColor(Color.RED);
>
> String mText = "Testing";
>
> Paint mFontPaint = new Paint();
> mFontPaint.setColor(Color.WHITE);
>
> //setting rect
> Rect mBackgroundRect = new Rect();
> mFontPaint.getTextBounds(mText, 0, mText.length(), mBackgroundRect);
>
> //the bitmap to be drawn a text and backgroundRect
> Bitmap mBitmap = Bitmap.createBitmap(mBackgroundRect.width(),
> mBackgroundRect.height(),
> Bitmap.Config.ARGB_);
> Canvas mCanvasBitmap = new Canvas(mBitmap);
>
> //draw text and background to bitmap
> mCanvasBitmap.drawColor(Color.CYAN);
> mCanvasBitmap.drawRect(mBackgroundRect, mBackgroundPaint);
> mCanvasBitmap.drawText(mText, 0, 0, mFontPaint);
>
> //draw bitmap to canvas
> c.drawBitmap(mBitmap, 0, 0, null);
>
> }
>
> this will only drawn Cyan color, the text and red background is not
> displayed
> i have to translate for example :
> mCanvasBitmap.translate(0, mBackgroundRect.height())
>
> to make it displayed (but not 100% correctly position)
> please help >.<
> thx
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