I have this function that animate the image canvas from resource drawable with text on the front.
I want to rotate the a green "star" only so the text stay intact
The idea is to rotate only the image canvas but no the text.
How do I do that?
This code is for Android Java
private Bitmap writeTextOnDrawable(int drawableId, String text, ImageView imv_promo,boolean isAnim) {
Bitmap bm = BitmapFactory.decodeResource(ctx.getResources(), drawableId).copy(Bitmap.Config.ARGB_8888, true);
Typeface tf = Typeface.createFromAsset(ctx.getAssets(), "RobotoCondensed-Italic.ttf");
Paint paint = new Paint();
paint.setStyle(Paint.Style.FILL);
paint.setColor(ctx.getResources().getColor(R.color.white));
paint.setTypeface(tf);
paint.setTextAlign(Paint.Align.CENTER);
paint.setTextSize(convertToPixels(mContext, 17));
Rect textRect = new Rect();
paint.getTextBounds(text, 0, text.length(), textRect);
Canvas canvas = new Canvas(bm);
//If the text is bigger than the canvas , reduce the font size
if (textRect.width() >= (canvas.getWidth() - 4)) //the padding on either sides is considered as 4, so as to appropriately fit in the text
paint.setTextSize(convertToPixels(mContext, 7)); //Scaling needs to be used for different dpi's
//Calculate the positions
int xPos = (canvas.getWidth() / 2) - 6; //-2 is for regulating the x position offset
int yPos = (int) ((canvas.getHeight() / 2) - ((paint.descent() + paint.ascent()) / 2));
canvas.save();
canvas.rotate((float) 25, xPos, yPos);
canvas.drawText(text, xPos, yPos, paint);
canvas.restore();
Animation animation;
if(isAnim) {
animation = new RotateAnimation(0, 360, canvas.getWidth() / 2, canvas.getHeight() / 2);
animation.setRepeatMode(Animation.RESTART);
animation.setRepeatCount(Animation.INFINITE);
animation.setDuration(20000L);
imv_promo.startAnimation(animation);
}
return bm;
}
Related
I'm trying to draw some text on bitmap with a fixed position (Bottom left corner) no matter how bitmap size different.
Code below works but, the Text is drawn on the center of the bitmap
public Bitmap drawTextToBitmap(Context gContext,
Bitmap bitmap,
String gText) {
Resources resources = gContext.getResources();
float scale = resources.getDisplayMetrics().density;
android.graphics.Bitmap.Config bitmapConfig =
bitmap.getConfig();
if (bitmapConfig == null) {
bitmapConfig = android.graphics.Bitmap.Config.ARGB_8888;
}
bitmap = bitmap.copy(bitmapConfig, true);
Canvas canvas = new Canvas(bitmap);
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
paint.setColor(getResources().getColor(R.color.fujiColor));
paint.setTypeface(Typeface.createFromAsset(getAssets(), "fonts/DS-DIGI.TTF"));
paint.setTextSize((int) (14 * scale));
paint.setShadowLayer(1f, 0f, 1f, getResources().getColor(R.color.fujiShadowColor));
Rect bounds = new Rect();
paint.getTextBounds(gText, 0, gText.length(), bounds);
int x = (bitmap.getWidth() - bounds.width()) / 2;
int y = (bitmap.getHeight() + bounds.height()) / 2;
canvas.drawText(gText, x, y, paint);
return bitmap;
}
What I need is something similar to this :
Thank you.
As mentioned in the official docs, the text is drawn taking the (x,y) values as origin. Change the x,y values. Something along the following lines should work.
int horizontalSpacing = 24;
int verticalSpacing = 36;
int x = horizontalSpacing;//(bitmap.getWidth() - bounds.width()) / 2;
int y = bitmap.getHeight()-verticalSpacing;//(bitmap.getHeight() + bounds.height()) / 2;
I'm trying to create a bitmap to put in a notification's LargeIcon, I set the text but I can't get to set a rounded background color.
public Bitmap textAsBitmap(String text, float textSize, int textColor) {
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
paint.setTextSize(textSize);
paint.setColor(textColor);
paint.setTextAlign(Paint.Align.LEFT);
float baseline = -paint.ascent(); // ascent() is negative
int width = (int) (paint.measureText(text) + 0.5f); // round
int height = (int) (baseline + paint.descent() + 0.5f);
Bitmap image = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(image);
canvas.drawText(text, 0, baseline, paint);
return image;
}
A diffrent aproach to the same result is welcome
I'm making a circle canvas and I want to add a border to it .
final int color = 0xffa19774;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, sbmp.getWidth(), sbmp.getHeight());
paint.setAntiAlias(true);
paint.setFilterBitmap(true);
paint.setDither(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(Color.parseColor("#BAB399"));
canvas.drawCircle(sbmp.getWidth() / 2+0.7f, sbmp.getHeight() / 2+0.7f,
sbmp.getWidth() / 2+0.1f, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(sbmp, rect, rect, paint);
How can I add a border around this canvas ?
You can draw a border using Paint.STYLE.STROKE. You need to do two separate calls to drawCircle():
paint.setStyle(Paint.Style.FILL);
paint.setColor(Color.parseColor("#BAB399")); // set fill color
canvas.drawCircle(sbmp.getWidth() / 2+0.7f, sbmp.getHeight() / 2+0.7f,
sbmp.getWidth() / 2+0.1f, paint);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(10); // set stroke width
paint.setColor(Color.parseColor("#ffffff")); // set stroke color
canvas.drawCircle(sbmp.getWidth() / 2+0.7f, sbmp.getHeight() / 2+0.7f,
sbmp.getWidth() / 2+0.1f, paint);
To draw a border around a circle, you only need to draw two circles on to your canvas. Both circles have the same dimension however the circle below should have a stroke.
Also, to draw an image border, the circle below should be given a bigger radius than the one above.
public static Bitmap getRoundedCroppedBitmap(Bitmap bitmap, int radius) {
Bitmap finalBitmap;
if (bitmap.getWidth() != radius || bitmap.getHeight() != radius)
finalBitmap = Bitmap.createScaledBitmap(bitmap, radius, radius,
false);
else
finalBitmap = bitmap;
Bitmap output = Bitmap.createBitmap(finalBitmap.getWidth(),
finalBitmap.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, finalBitmap.getWidth(),
finalBitmap.getHeight());
paint.setAntiAlias(true);
paint.setFilterBitmap(true);
paint.setDither(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(Color.parseColor("#BAB399"));
canvas.drawCircle(finalBitmap.getWidth() / 2 + 0.7f, finalBitmap.getHeight() / 2 + 0.7f, finalBitmap.getWidth() / 2 + 0.1f, paint);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
canvas.drawBitmap(finalBitmap, rect, rect, paint);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(20); // set stroke width
paint.setColor(Color.parseColor("#00ff00")); // set stroke color
canvas.drawCircle(finalBitmap.getWidth() / 2 + 0.7f, finalBitmap.getHeight() / 2 + 0.7f, finalBitmap.getWidth() / 2 + 0.1f, paint);
return output;
}
The example above returns a bitmap circle image with a border.
This is the code to draw the stroke
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(20); // set stroke width
paint.setColor(Color.parseColor("#00ff00")); // set stroke color
canvas.drawCircle(finalBitmap.getWidth() / 2 + 0.7f, finalBitmap.getHeight() / 2 + 0.7f, finalBitmap.getWidth() / 2 + 0.1f, paint);
Im trying to create a round frame around my bitmap!
With this code im able to make my bitmap round:
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap) {
Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap
.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final int color = 0xff4242DB;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
final RectF rectF = new RectF(rect);
final float roundPx = bitmap.getWidth()/2;
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
//canvas.drawCircle(0, 0, bitmap.getWidth(), paint);
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
}
What i've tried is to draw a circle(the outcommented line) with canvas, but It had no result.
Does anyone know how I can add a circular border around it?
EDIT
When I use the line:
canvas.drawCircle(0, 0, bitmap.getWidth(), paint);
The effect is, that 3 corners get rounded but the upper left stays the same(90 degrees)
But I can't see any line or circle!
Update
There now is RoundedBitmapDrawable and a corresponding factory in the Support library I recommend to use that, unless more flexibility is required.
Original Answer
You have to draw the circle after the bitmap. This is what did the trick for me.
int w = bitmap.getWidth();
int h = bitmap.getHeight();
int radius = Math.min(h / 2, w / 2);
Bitmap output = Bitmap.createBitmap(w + 8, h + 8, Config.ARGB_8888);
Paint p = new Paint();
p.setAntiAlias(true);
Canvas c = new Canvas(output);
c.drawARGB(0, 0, 0, 0);
p.setStyle(Style.FILL);
c.drawCircle((w / 2) + 4, (h / 2) + 4, radius, p);
p.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
c.drawBitmap(bitmap, 4, 4, p);
p.setXfermode(null);
p.setStyle(Style.STROKE);
p.setColor(Color.WHITE);
p.setStrokeWidth(3);
c.drawCircle((w / 2) + 4, (h / 2) + 4, radius, p);
return output;
This does of course not include the fancy shadow of your example.
You might want to play around a little bit with the additional pixels.
I need to draw a text using
canvas.drawText("1",x,y, paint);
But the problem is that the "text's center" doesn't match with the position I have given,Is there any way I can do the latter.I have done quite a lot of search on the topic,culdn't find any answer.Please help.
Thank You in advance
You'll want to set the alignment on your paint instance:
paint.setTextAlign(Paint.Align.CENTER);
prior to drawing.
See: http://developer.android.com/reference/android/graphics/Paint.html#setTextAlign(android.graphics.Paint.Align)
Edit:
Per your indication that you'd also like it centered vertically, I'd go with an approach similar to this:
paint.setColor(Color.WHITE);
paint.setTextAlign(Align.LEFT);
String text = "Hello";
Rect bounds = new Rect();
float x = 100, y = 100;
paint.getTextBounds(text, 0, text.length(), bounds); // Measure the text
canvas.drawLine(0, y, canvas.getWidth(), y, paint); // Included to show vertical alignment
canvas.drawLine(x, 0, x, canvas.getHeight(), paint); // Included to show horizsontal alignment
canvas.drawText(text, x - bounds.width() * 0.5f, y + bounds.height() * 0.5f, paint); // Draw the text
or, using the center align on the paint:
paint.setColor(Color.WHITE);
paint.setTextAlign(Align.CENTER);
String text = "Hello";
Rect bounds = new Rect();
float x = 100, y = 100;
paint.getTextBounds(text, 0, text.length(), bounds); // Measure the text
canvas.drawLine(0, y, canvas.getWidth(), y, paint); // Included to show vertical alignment
canvas.drawLine(x, 0, x, canvas.getHeight(), paint); // Included to show horizsontal alignment
canvas.drawText(text, x, y + bounds.height() * 0.5f, paint); // Draw the text