How can I draw text on a bitmap? I made this:
float width = Converter.convertDpToPixel(250, context);
float height = Converter.convertDpToPixel(40, context);
Bitmap myBitmap = Bitmap.createBitmap((int)width + 1, (int)height+1, Bitmap.Config.ARGB_8888);
Canvas myCanvas = new Canvas(myBitmap);
Paint paint = new Paint();
Typeface tanger = Typeface.createFromAsset(context.getAssets(),"fonts/Tangerine_Bold.ttf");
paint.setAntiAlias(true);
paint.setSubpixelText(true);
paint.setTypeface(tanger);
paint.setStyle(Paint.Style.FILL);
paint.setColor(Color.BLACK);
paint.setTextSize(55);
paint.setTextAlign(Align.CENTER);
myCanvas.drawText(quote, 16, 60, paint);
return myBitmap;
but only display a part of the text and I don´t know why.
Thank you
Your Bitmap is 40px in height, while your text is drawn starting from 60px below the top of your bitmap. Since your textSize is 55 part of it is still visible. You'll probably want to increase the height of your Bitmap.
Related
I have a question regarding a circular ImageView. When I try to set the background color of my ImageView, it actually ends up being a square and not a circle when in reality I would want the ImageView to be a simple circular ImageView with some text as the image. Here was my attempt.
ImageView imageView = postViewHolder.fourthCommenter;
Bitmap b=Bitmap.createBitmap(30, 30, Bitmap.Config.ARGB_8888);
BitmapShader shader = new BitmapShader(b, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
Paint paint = new Paint();
paint.setShader(shader);
paint.setAntiAlias(true);
Canvas c = new Canvas(b);
c.drawCircle(b.getWidth()/2, b.getHeight()/2, b.getWidth()/2, paint);
c.drawText("+10",30,30,paint);
imageView.setBackgroundColor(ContextCompat.getColor(context, R.color.material_color_grey_200));
imageView.setImageBitmap(b);
All I want is to have the image show a grey circular Imageview with the word "+10" in it. What shows up is a simple square Imageview with no text in it. I can't see what I am doing wrong.
Any help would be apprecaited.
Thanks!
EDIT: Here is an example of what I would want. I want to have an image that looks exactly like the +16 image shown on this photo:
All I want is to have the image show a grey circular Imageview
Try this code
Bitmap picture = BitmapFactory.decodeResource(getResources(), R.mipmap.add_image);
ImageView imageView = (ImageView) findViewById(R.id.imgProfilePicture);
imageView.setImageBitmap(getRoundedBitmap(picture));
public Bitmap getRoundedBitmap(Bitmap bitmap){
Bitmap circleBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
BitmapShader shader = new BitmapShader(bitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
Paint paint = new Paint();
paint.setShader(shader);
paint.setAntiAlias(true);
Canvas c = new Canvas(circleBitmap);
c.drawCircle(bitmap.getWidth() / 2, bitmap.getHeight() / 2, bitmap.getWidth() / 2, paint);
return circleBitmap;
}
Your xml file
<de.hdodenhof.circleimageview.CircleImageView
android:id="#+id/imgProfilePicture"
android:layout_width="110dp"
android:layout_height="110dp"
android:layout_marginBottom="20dp"
app:civ_border_width="3dp"
app:civ_border_color="#color/light_gray" />
and add this in build.gradle
compile 'de.hdodenhof:circleimageview:2.1.0'
Cirular ImageView Done !
Not sure if it's the proper way to do it , but it should work for your case :
First use this to create the bitmap with the required circle shape :
public Bitmap getCircledBmp(Context mContext,Bitmap bmp){
Canvas canvas = new Canvas(bmp);
int color = ContextCompat.getColor(mContext, R.color.material_color_grey_200);
Paint paint = new Paint();
Rect rect = new Rect(0, 0, bmp.getWidth(), bmp.getHeight());
RectF rectFloat = new RectF(rect);
paint.setAntiAlias(true);
paint.setColor(color);
canvas.drawARGB(0, 0, 0, 0);
canvas.drawOval(rectFloat, paint);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
canvas.drawBitmap(bmp, rect, rect, paint);
return bmp;
}
Then add the text that you want :
public Bitmap drawText(String text, Bitmap bmp, int textSize) {
//text dimensions
TextPaint textPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
textPaint.setTextSize(textSize);
textPaint.setColor(Color.BLACK);
textPaint.setTextAlign(Paint.Align.CENTER);
StaticLayout mTextLayout = new StaticLayout(text, textPaint,
bmp.getWidth(), Layout.Alignment.ALIGN_NORMAL, 1.0f, 0.0f, false);
Canvas canvas = new Canvas(bmp);
//draw text
canvas.save();
canvas.translate((canvas.getWidth() / 2), (canvas.getHeight() / 2) -
((mTextLayout.getHeight() / 2)));
mTextLayout.draw(canvas);
canvas.restore();
return bmp;
}
In the end you should get your desired image like this :
Bitmap bmp = Bitmap.createBitmap(100,100,Bitmap.Config.ARGB_8888); //change the values whatever you like
ImageView imageView = postViewHolder.fourthCommenter;
imageview.setImageBitmap(drawText("+10",getCircledBmp(this,bmp),30));
I have a problem with set up the right position of the text as a paint in canvas object,
which I use as thumb in customise SeekBar.
public BitmapDrawable writeOnDrawable(int drawableId, String text)
{
Bitmap bm = BitmapFactory.decodeResource(getResources(),drawableId).copy(Bitmap.Config.ARGB_8888, true);
bm.setDensity(165);
Paint paint = new Paint();
paint.setStyle(Style.FILL);
paint.setColor(Color.WHITE);
paint.setTextSize(size);
paint.setTypeface(my.b1);
paint.setTextAlign(Paint.Align.CENTER);
Canvas canvas = new Canvas(bm);
canvas.setDensity(165);
canvas.drawText(text, 0, bm.getHeight()/2, paint);
return new BitmapDrawable(bm);
}
There is a circle with current progress. So the text is
dynamic cause can be from 2 characters ("0-9%") to
4 characters ("100%"). Also the problem is not only with position,
but also with the size of the text.
In my application I used canvas to draw the text. now I want to set the width of the draw text. I can set only x , y position. I can't set width and height.
My problem
update
for example "India is my Country" or if any length text it goes outside of canvas that is outside of the background image.
i want to print "India is
my country" if i set width mean i think it goes to next line
#Override
protected void onDraw(Canvas canvas1)
{
Paint paint = new Paint();
Bitmap myBitmap = BitmapFactory.decodeResource(getResources(),R.drawable.ban_background);
Bitmap resizeImage1=Bitmap.createScaledBitmap(myBitmap,590,350,false);
canvas1.drawColor(Color.BLACK);
canvas1.drawBitmap(resizeImage1,10,5, null);
paint.setStyle(Paint.Style.FILL);
paint.setAntiAlias(true);
paint.setTextSize(25);
paint.setColor(Color.BLUE);
paint.setFakeBoldText(true);
paint.setTextSize(20);
paint.setStyle(Paint.Style.FILL_AND_STROKE);
canvas1.drawText(CameraText, 100,175, paint);
}
}
i have used to create a bitmap as follows and iam able to set the width and height
Bitmap finalImage = Bitmap.createBitmap(IMAGE_WIDTH, IMAGE_HEIGHT,
Bitmap.Config.RGB_565);
Bitmap tempImage = Bitmap.createBitmap(IMAGE_WIDTH / 2, IMAGE_HEIGHT,
Bitmap.Config.RGB_565);
Canvas g = new Canvas(finalImage);
Canvas gtemp = new Canvas(tempImage);
g.drawColor(Color.WHITE);
gtemp.drawColor(Color.WHITE);
Paint pnt = new Paint();
pnt.setColor(Color.BLACK);
pnt.setTextAlign(Paint.Align.CENTER);
pnt.setTextSize(40);
pnt.setTypeface(font1);
g.drawText(input, IMAGE_WIDTH / 2, 40, pnt);
Rect grct = new Rect(0, 0, IMAGE_WIDTH, IMAGE_HEIGHT);
Rect grctTemp = new Rect(0, 0, IMAGE_WIDTH / 2, IMAGE_HEIGHT);
gtemp.drawBitmap(finalImage, grct, grctTemp, pnt);
`
i am not sure what you mean but you can try the setStrokeWidth(2.0f)
i hope this helps :D
I am using the following code snippet to create a bitmap with text.
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
paint.setStyle(Style.FILL);
paint.setColor(fontColor);
paint.setTextSize(fontSize);
canvas.drawText("My Text", x, y, paint);
Here's the catch. How do I determine the size of the Bitmap to use in the canvas beforehand? For instance if I want a bitmap with "Hello World!" on it, I want to find the width and height of it even before I draw the text on the canvas.
You can tyr this:
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
Rect bounds = new Rect();
paint.setStyle(Style.FILL);
paint.setColor(fontColor);
paint.setTextSize(fontSize);
paint.getTextBounds("My Text", 0, "My Text".length(), bounds);
int width = bounds.width();
int height = bounds.height();
canvas.drawText("My Text", x, y, paint);
Try this, it loads the bitmap, then gets the heigth and width, then you just have to draw it. Replace bitmap with your image name
bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.bitmap);
bitmapHeigth = bitmap.getHeigth();
bitmapWidth = bitmap.getWidth();
I have the following code to draw text.
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
Paint paint = new Paint();
paint.setTextSize(400);
paint.setColor(Color.WHITE);
paint.setAntiAlias(true);
paint.setTextAlign(Align.LEFT);
paint.setStyle(Style.FILL);
String text = "698";
Rect bounds = new Rect();
paint.getTextBounds(text, 0, text.length(), bounds);
int textWidth = bounds.width();
int textHeight = bounds.height();
Bitmap originalBitmap = Bitmap.createBitmap(textWidth,
textHeight, Bitmap.Config.ARGB_8888);
Canvas singleUseCanvas = new Canvas(originalBitmap);
singleUseCanvas.drawColor(Color.BLUE);
singleUseCanvas.drawText(text, 0, textHeight, paint);
canvas.drawBitmap(originalBitmap, 0, 0, null);
}
I am getting undesired outcome, which its right and bottom sides are being cropped.
I avoid right side cropping, by using
float textWidth = paint.measureText(text);
Bitmap originalBitmap = Bitmap.createBitmap((int)(textWidth + 0.5),
textHeight, Bitmap.Config.ARGB_8888);
I am getting the following improvement
Yet. My bottom still being cropped. May I know what is the correct way to obtained rendered text height, which is analogy to rendered text width using paint.measureText?
I think i would be helpful to have a look at this post:
Android Paint: .measureText() vs .getTextBounds()
It have a good survey about sizing of rendered text and also text height which is your concern.