I want to define the contentArea of a Frame/Linear/Relative layout so that when I do layout.addView(view); it only added within the boundries and the rest of the view is clipped away. Like the picture of shirt, if I want to define the boundries of shirt to be the area of content...how can I do that. Any suggestions/help?
Thanks
PS: cannot do that in 9-patch (right and bottom) as it only defines in rectangular shape, in this case shape can be anything like that of a shirt. Want to omit the white/transparent part from the contentArea.
try the below code :-
Just in case someone is trying to solve same problem, there is a better solution: Bitmap.createBitmap(Bitmap, int x, int y, int width, int height). For example, if you need to crop 10 pixels from each side of a bitmap then use this:
Bitmap croppedBitmap = Bitmap.createBitmap(originalBitmap, 10, 10, originalBitmap.get
That's not really something you can do.
From what i understand you can't use PorterDuff because you need to add views to this clipped container.
I would suggest an easy trick that might be useful for u. Just add an imageview on top of your Frame/RelativeLayout that has as content an image with a full transparency on the part you want to be visible and it's opaque in the area u want to clip.
Graphically speaking that way you should achieve exactly what u need.
Related
In my application I have a requirement to animate an image (this image view has an arrow set as source).
I am unable to figure this out how I can achieve this.To solve this i got x and y coordinates of second view that is rectangle after getting coordintes i am setting
scaleX() of image view that is purple line but I am not geeting desire out put because it stretches to the whole screen along x-axis
here is the code what i tried is
int x = (int) imageView.getX();
imageView2.setScaleX(x);
here imageview is rectangular box and imageview 2 is the purple line
Why you dont try with scenes? It's exactly what you need.
http://developer.android.com/training/transitions/scenes.html
I think you are getting the correct output when using the above code. Scale is defined against initial dimensions. And you would need to use something like this
dist = box.getX() - circle.getX()
and your scale would be
imageView2.setScale(dist/distInitial)
where distInitial you compute it at creation time using the dist formula.
You might need to change the position because it is scaled around the center of it (i.e. a smaller scale shrink margins to center of image)
You might want to perform this operations using a Canvas. It might be more efficient.
I have a transparent layout in android, and behind the layout there is an image. how to make the linear blur ? I found examples to make the image itself blur but I don't want to make whole image blue, just only the part that is behind the linear layout.
Set a semitransparent Blur image to the linear layout or simplest set a color to linear layout and set it to semitransparent by defining alpha
edited solution
do this...
1.) create a blur copy of the image u have on background.
2.) clip the image by using
Bitmap croppedBmp = Bitmap.createBitmap(originalBmp, startX, startY, widthLayout , heightOfLayout);
3.) set this image in the Linear Layout using an image-view with height and width attribute as fill-parent.
I have pretty complex solution, so there won't be any code. So, here is idea, step by step:
Let's assume that your layout have just single custom LinearLayout. No ImageView as a background.
What we going to do, is draw background drawable of LinearLayout by our own, so it will first draw full image and then draw blurred square from the same image on top. Content of LinearLayout might be moved to desired position using paddings.
So, create something like MyLinearLayout and put it to your layout resource. Provide required constructors.
Override onAttachedToWindow() and onDetachedFromWindow() methods. Inside them we should load our background Bitmap and recycle it accordingly. Let's name it mBackground
Override draw() method. Inside it we're going to first draw our mBackground.
Then, you can use Canvas#clipRect() method to crop drawing area of Canvas to some specified rectangle. In your case, this rectangle should be the area below your content. You can figure it out using View#getPadding*() methods. Don't forget to call canvas#save() before clipping drawing area.
Now you can draw your bitmap once again with blur (I don't know which method exactly you're using, so let's assume that you know how to do it... but you still can share it with us :) ). Cool thing is that you can just draw the same Bitmap once again in full scale - since we had called clipRect before, it will be drawn only within this area. Don't forget to call canvas#restore() after drawing background.
Call super.draw() to draw rest of the stuff, that your LinearLayout contains.
How to change TRANSPARENT part of image set in imageview with another image?
Below is the main image, there is TRANSPARENT portion(here looks white), i want to set another image withing that portion of image.
any idea how to do it?
Question:
How to find TRANSPARENT portion starting point LEFT(x,y), RIGHT (x,y), BOTTOM LEFT (x,y), BOTTOM RIGHT(x,y) ? for image replacement.
How to process bitmap in runtime to add another image to make changes in imageview?
I've tried this to find transparent part of image.
You have a bitmap (B1) and there is only one rectangle transparent zone somewhere. And you want to place another bitmap (B2) inside it.
use monte-carlo method to find any transparent pixel on B1. You know
it's coordinates now.
go [left/right/top/bottom] from transparent pixel and find
first solid pixel. Now you know transparent rectangle coorditates.
There are several ways to put something inside transparent area. You can:
place second imageview (with B2) under the first one (with B1). Set B2 padding inside imageview accordingly transparent zone coordinates.
create new image from B1 and B2 and set it to imageview.
do it some other way...
try this example in this crop image with transparent part it will use full for you.
https://github.com/ketanpatel25/Image-Cropping-In-Transparent-Area
I have been trying to make a circular TextView. Its a circle in which I want to accomodate whole space above a circular bubble as shown in image below.
Kindly see attached image.
In this image, we have a circular bubble with circular text in it.
I have already tried setting oval shape .xml as background of TextView but still no luck.
Edit:
As text length increase. It must reduces in size to fit inside the circle. This is the hardest part to think about.
You need to create a custom view, extending from TextView probably, setting the circle as background image, and calculate the text width / break the lines manually according to the width of the text.
To calculate the width of a string, see How to calculate string font width in pixels?
Some math and calculations is required of course to measure the available space per line; but I think that's the only way, as there's no standard component out there to do it.
To place the text onto the view, use drawText of the Canvas class.
Is there a way to tell precisely where an image is placed on the parent?
ImageView layout returns some frame around the actual image.
One can see the difference when working with images that are very different from the screen proportions. For example a square image on a long screen.
Worse: devices like Edge have their bottom bar that consumes parts of the screen and affect the layouting calculations. In that case it's hard to do reverse calculations.
I can't test this now, but try something like the following, I believe this should do what you need:
ImageView iv = (ImageView)findViewById(R.id.image_view);
Rect rect = iv.getDrawable().getRect();
int xOffset = rect.left;
int yOffset = rect.top;
That should give you the exact pixel location of the top left corner. I'm pretty sure that the top-left is considered the origin...test this and see if it gives you the expected results, though.