I want to create this type of slider
I don't want the code but the directions. what is the best thing todo this?
is there any similar library project available?
is there any similar view already available natively.
is this more easy to create in jetpack compose UI.
Thank you so much for your help.
Since you refer to the view you want as a "slider", I assume that you are thinking about using something from the Material Design library. My personal experience with the Material Design views are that they primarily enforce the MD guideline and are not very flexible although they may work for you in this case.
is there any similar library project available?
As for libraries, it looks like the other answers point to some that may be capable of what you are looking for.
is there any similar view already available natively.
I suggest that you take a look at using a SeekBar not because I think that it is necessarily better, but I believe that you can get the result you want with a little effort that would not have external dependencies other than the standard libararies.
Here is another answer of mine that explains how to build a SeekBar similar in structure that you are looking for. Your background would be the rounded rectangle with gradient shading. The background colors can be defined as explained here. Your seek bar can be built using a LayerList. The layer list can be defined in XML and modified in code. You can also forgo the layer list and draw that seek bar programmatically or fit everything into one drawable. Which you do will depends on your design constraints.
The thumb can easily be a custom thumb.
You will likely wind up with mostly XML but some code but not much. I would consider placing the code in a custom view that extends from a standard SeekBar.
You can edit the following resources.
https://github.com/divyanshub024/ColorSeekBar
custom scroll able multi color seek bar
I built something similar with Jetpack Compose, instead of using different colors with intervals it creates gradients from colors, but what you ask is a little work on current build and it can display anything as thumb. You can check source code and implement drawing over track section. If it's much work i can add similar features when i'm available.
The easiest way of doing this in Compose Canvas, for View it's a custom View that draws inside onDraw.
You basically draw a line with width and rounded cap or a rounded rectangle and draw border with a stroke around it. Do some interpolation for changing from your value range to pixels on screen and get the current value based on users touch position and interpolate it to range defined.
Let's say your Slider is 1000px wide. And your range is between 0f and 1f, you translate touch on 600px to 0.6 value and vice versa. For different colors you can pass a List<Pair<Color,Float> to divide slider between color based on float based stops.
For drawing lines you set 3 types of heights and use modulus to assign each height in every 1, 5 and 20 value. I have something similar for building Compass with View here
https://github.com/SmartToolFactory/Compose-Colorful-Sliders
Related
I am trying to use the Tap Target View library from GitHub in an android app.
https://github.com/KeepSafe/TapTargetView
I was wondering if anyone knows if we can use this library to highlight a rectangular shape or if it is primarily for targets that can be surrounded by a circle. I like to highlight an entire row in a list view.
Thanks
This library when reviewing the codes you find out there is no arc or circle in this customView and is a Rect...
So how is this circle like? It cause the radius number it gets. so if you know you can change the code very easily and remove or make the radius to 0.
But my question is why? really is going to make a bad mess for rectangular things...
I'm tackling the task of an overlaying drawable over a view that animates the drawing of a checkmark as in the following video https://vid.me/MsQj
I don't have a preferred method for doing this but it's just not coming out the way I wanted it to, I tried:
Two views, each with on side of the checkmark to be revealed with an animation, however I'm stuck at the "revealed with an animation" since I can't use the circular reveal on -21
Frame by frame animation, this is the easiest but I'd hate to have 60 images for this stupid animation if it can be done programmatically
Drawing on a custom view canvas
My question would be, is there anything that can make this easier on me, or do I have to tackle it head first and just get on with it
You could create a custom View class which contains two lines defined by ShapeDrawables, one for each leg of the tick. Expose the lengths of these two lines as properties of the class, and then use Property Animation to animate the lengths of the lines.
Property Animation is flexible enough to handle pretty complex timing and sequencing of various properties. In this particular case you would probably want to use an AnimatorSet to sequence the two line animations so the second starts once the first has finished.
I ended up developing a custom View thanks to #SoundConception suggestion and finding out about ObjectAnimator which are very powerful in Android. In essence what goes on is we set a width for the first and second line that make the checkmark and using the animator change the value of those properties from 0 to the desired one.
On the setter for the property, we invalidate the View to redraw it with the new value and with a little tweaking I made a nice View that while its currently only working for my specific layout (ie it needs some more work on the offset calculation) it's able to draw an animated checkmark with some stuff that is customizable.
Precisely, you can set the line width, the color, the length and the animation time. And touching the java file, you can change the interpolator and all the rest of the stuff.
Hopefully the code, while not really commented serves as a basis for someone trying something similar.
For example the following code would generate something like this video, although not really because I was testing opacity and thinner lines, but you get my drift.
<coop.devtopia.CheckmarkView
android:layout_width="250dp"
android:layout_height="250dp"
android:layout_centerInParent="true"
android:id="#+id/view"
app:first_leg_length="50"
app:second_leg_length="100"
app:total_duration="1500"
app:stroke_width="20"
app:stroke_color="#22000000"/>
Repository
Update 4/2/15
I've played with this a little further and added dynamic offset calculation (fancy way of saying centering) to the tick, meaning we can generate big checkmarks, small checkmarks, skinny or thick, reversed or straight and they will be centered in the view. Can't guarantee the same for checkmarks bigger than the container, they will likely be cropped.
Here are a few of the checkmarks generated for this demonstration, of course the animate as if drawn and the effect can be very pleasing and resource friendly. This turn out to be a pretty interesting subject after all.
Does anybody have any idea on how to approach custom UI for an app?
I mean, there are several amazing looking apps out there, that DO NOT look like they were made using the layouts and views offered by Android.
Such as: PIE UI,
Color in the Dark, or look at this collection Collection
I basically want to know how to draw custom shapes and arrange them while making them clickable.
I know how to draw regular custom shapes, but how do I arrange them how do I make really custom shapes like parts of a circle or an ellipsis or even irregular shapes?
I know a little Photoshop, so there I can draw whatever my imagination lets me, but how do I integrate yhe images/shapes drawn there in the UI since I cannot place a shape by it's coordinates? Not all shapes can be placed inside a rectangle, because some parts might overlap. So how are they doing it?
Follows up to Custom points on graph using AndroidPlot
We are trying to make the points on a graph (A SimpleXYPlot from AndroidPlot) larger so that the graph can be read more easily. It doesn't seem like there's a simple setting for this, and the answer in the question above involves making a custom renderer, which seems like overkill.
Is there an easier way to do this?
You can control the size by setting the stroke width of your LineAndPointFormatter's vertex paint.
Programmatically:
formatter.getVertexPaint().setStrokeWidth(PixelUtils.dpToPix(20));
via XML (using Configurator):
vertexPaint.strokeWidth="20dp"
I am working on a project that involves painting on images.
To delete the unwanted lines or curves i have to draw a border and X button to delete it.
I have a relative layout where i have the freehand drawing canvas. on edit mode i should make them as u see in the pic, where i have to create button on a varying x,y positions.
i am confused how to achieve this.
Thanks in advance.
Jana.
I suggest doing this manually rather than using the Button widget. Override the onTouchEvent on the view holding your painting and use MotionEvent.getX and MotionEvent.getY in combination with MotionEvent.getAction to determine behaviour when the user touches the 'button'. Skipping widget creation will improve performance and open up doors to other types of functionality.
You could use the deprecated AbsoluteLayout container for this or keep the RelativeLayout and use layoutMargins to set the location of the buttons. The former is the route you should take despite the container being deprecated as the later breaks the layout paradigm by misusing margins...
You should keep in mind that there are a variety of devices with different screen sizes and setting explicit, pixel based locations is going to be awkward.