Android Simple Drawing on Canvas by finger Example Tutorial - Android Examples

 

android canvas draw line tutorial

Can anybody tell how to draw a line in Android, perhaps with an example? android. There are two main ways you can draw a line, by using a Canvas or by using a View. Drawing a Line with Canvas. From the documentation we see that we need to use the following method: drawLine (float startX, float startY, float stopX, float stopY, Paint paint). Update - Nov 21, Created a series over this topic over at Drawing with Canvas Series, more articles would appear in the future:) Update - Nov 13, There is a renewed/enchanced version of this tutorial though i still recommend to read this article if you're completely new to Android or Canvas in Android, for we reference back to this article. Nov 10,  · draw Curved Bottom Navigation View in Android Tutorial Online using Android Studio for Beginners. Learn android app development step by step and download. draw Curved Bottom Navigation View in Android Tutorial Online using Android Studio for Beginners. Learn android app development step by step and download Add the below line in.


How to draw a line in android - Stack Overflow


By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service, android canvas draw line tutorial. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. If you want to have a simple Line in your Layout to separate two views you can use a generic View with the height and width you want the line to have and a set background color.

With this approach you don't need to override a View or use a Canvas yourself just simple and clean add the line in xml. The example code I provided will generate a line that fills the screen in width and has a height of one dp. If you have problems with the drawing of the line on small screens consider to change the height of the line to px.

The problem is that on a ldpi screen the line will be 0, android canvas draw line tutorial. Sometimes this may result in a rounding that makes the line vanish. If this is a problem for your layout define the width of the line a ressource file android canvas draw line tutorial create a separate ressource file for small screens that sets the value to 1px instead of 1dp.

This approach is only usable if you want horizontal or vertical lines that are used to divide layout elements. If you want to achieve something like a cross that is drawn into an image my approach will not work.

There are two main ways you can draw a line, by using a Canvas or by using a View, android canvas draw line tutorial. From the documentation we see that we need to use the following method:. The Paint object just tells Canvas what color to paint the line, how wide it should be, and so on. If you only need a straight horizontal or vertical line, then the easiest way may be to just use a View in your xml layout file. You would do something like this:, android canvas draw line tutorial.

Here is a picture with two lines one horizontal and one vertical to show what it would look like:. You can draw multiple straight lines on view using Finger paint example which is in Developer android. Just comment: mPath. If you're working with ConstraintLayout you need to define at least 2 constraints for the line to show up.

Like this:. Learn more. First 10 Free. How to draw a line in android Ask Question. Asked 9 years ago. Active 1 year ago. Viewed k times. Can anybody tell how to draw a line in Android, perhaps with an example? Do you want to draw a line into something or do you want to draw a simple line in the layout?

This one draws 2 lines which form a cross on the top left of the screen: DrawView. Context; import android. Canvas; import android. Color; import android. Paint; import android. Activity; import android. Pehlaj 7, 8 8 gold badges 30 30 silver badges 46 46 bronze badges, android canvas draw line tutorial.

DonGru DonGru I want to draw a straight line how can i give the value startx start y stopx stopy? I draw line on the background using this method. I android canvas draw line tutorial to erase a drawn line. Any android canvas draw line tutorial for me. Can you suggest me? Janusz Janusz k gold badges silver badges bronze badges. How can add the same view at runtime that's dynamically? Lakshmanan, give it an id, and set its visibility to View. Drawing a Line with Canvas From the documentation we see that we need to use the following method: drawLine float startX, float startY, float stopX, float stopY, Paint paint Here is a picture: The Paint object just tells Canvas what color to paint the line, how wide it should be, and so on.

BLACK ; paint. Suragch Suragch k gold badges silver badges bronze badges. I have been trying to figure out how they get the android canvas draw line tutorial while drawing a view using paint Is there any online tool to simulate such graph so i use it while coding?

Im trying to draw two different lines. Once if the first line has been drawn, i have to draw the second It will redraw the view without the line. Bitmap; import android. Path; import android. Point; import android. Bundle; import android.

MotionEvent; import android. View; import android. OnTouchListener; import android. Hema Hema 4 4 silver badges 10 10 bronze badges. Can Someone help me how can i see my xml elements on my view which are on relative layout??

How u solved android canvas draw line tutorial your issue. Hussain 4, 3 3 gold badges 34 34 silver badges 49 49 bronze badges. Mohanraj Mohanraj 5 5 silver badges 4 4 bronze badges.

Burhan ARAS-they are not same as width and height are changed in two views. Reno Another approach to draw a line programatically using ImageView import android. Typeface; import android. Android canvas draw line tutorial ; paint. LayoutParams LinearLayout. Prajwal Udupa Prajwal Udupa 4 4 silver badges 26 26 bronze badges. Kashif Kashif 5 5 silver badges 9 9 bronze badges.

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Canvas | Android Developers

 

android canvas draw line tutorial

 

Update - Nov 21, Created a series over this topic over at Drawing with Canvas Series, more articles would appear in the future:) Update - Nov 13, There is a renewed/enchanced version of this tutorial though i still recommend to read this article if you're completely new to Android or Canvas in Android, for we reference back to this article. AlarmClock; BlockedNumberContract; bouarrets.gadNumbers; Browser; CalendarContract; bouarrets.gaees; bouarrets.gaarAlerts. Sep 24,  · How to create sketch android application with clear screen button using Paint, Bitmap and Path class. In this tutorial we are going to create an android application with the use of Paint, Bitmap, Canvas and Path classes to make an android app with drawing feature, like a real sketch board but there is only one difference that our drawing board is completely dynamic and soft board.