android draw line over textview

Your email address will not be published. You can crossed out a text when you want to show the current and discount price or while you are editing some text in a notepad. Using StaticLayout is quite simple. A Small Surprise – 6. Note: StaticLayout.Builder was added in API Level 23. In Android SDK we can use a lot of useful predefined and ready-to-go views like TextView, Button, CheckBox, ProgressBar and many others. A TextView displays text to the user and optionally allows them to edit it.A TextView is a complete text editor, however the basic class is configured to not allow editing.. Otherwise, Android uses an internal class TextLine to handle complex text … If we had to draw text ourselves, that would be super-tricky. In this tutorial we are creating a View between two textview and separate them using Separator line. Thankfully, we have several nice options: 12. drawText. Let’s take a look at the some of the options we have: The alignment of the text, similar to gravity. Preview of Android Textview border. Be sure to handle backwards compatibility appropriately. In order to draw the line, we use canvas.drawRect(…). 5- Next we need to add a Button. We can use these properties along with a basic Canvas translation to position the text. In this tutorial we are creating an straight line just above the canvas using canvas.drawLine() method. Note: If you happen to be utilising this in the onDraw function of a custom View, be sure to instantiate the StaticLayout separately to avoid object allocation during drawing (in a constructor or Kotlin init block, for example). Using Line shape we can create Underline below TextView Just like this. In short, you use it exactly as you would Paint and don’t have to worry about the extra data it includes (for the purpose of what we are doing). How do I load an ImageView by URL on Android? So let’s make an extension function for Canvas! It makes use of the handy Canvas.withTranslation function found in the Android KTX library: There may be multiple places in an app in which we need to implement multiline text drawing. Options to justify the text (stretch spaces so that the lines appear “square”). You could have a look at these three xml properties of the TextView: If the text you're putting in the [code ]TextView[/code] is short, it will not automatically expand to four lines. The same is true for StaticLayout; additional parameters can be appended to the StaticLayout.Builder. 10- Inside the Button onClick method is where we are going to strikethrough text for both TextView and Button. This extension function includes most (not all) of the StaticLayout properties, and provides default values for those that may not be used as commonly. Create Drawing Objects. Greetings! After over an hour of reading Android-related blogs and forums posts, I came across this little gem on the official Android issue tracker: Issue 29944: DashPathEffect/drawLine not … Considering that we are trying to draw some static (multiline) text to Canvas, StaticLayout is just what we need! We have recently published 100+ articles on android tutorials with kotlin and java. The framework divides drawing into two areas: What to draw, handled by Canvas; How to draw, handled by Paint. 2- Open up activity_main.xml file, here we will add a TextView and 2 Buttons. First, we should care about the warning. If you need, you may visit Android Tutorial for beginners page. In this tutorial we will be using the following: 1- Open up Android Studio and create a new project and give it a name, in our case we’ve named it (StrikethroughText), choose API 16 as the minimum SDK, then choose a blank activity, click “Finish” and wait for Android Studio to build your project. This example demonstrates how do I make a dotted/dashed line in Android. You can't draw a Textview directly, but you can put it in a layout and draw the layout. Check the StaticLayout and StaticLayout.Builder documentation for what’s available. Questions: I would like to draw a line right in the middle of a layout and use it as a separator of other items like TextView. Here is how we can use that flag on TextView to strikethrough text: 11- Here is how you can remove the Android strikethrough text: 12- If you want to check whether the TextView text is crossed out or not you do it like this: 13- Here is the full code for file: 14- Compile and run the app, tap on (Strikethrough text) Button to strikethrough text in the TextView and the Button. A resultant height property becomes available once the StaticLayout has been instantiated. 7- Here is the full code for activity_main.xml file. In this blog you will know how to increase the spacing between two lines of TextView. Here, a horizontal line was drawn by making a rectangle of very small height and the desired width such that it becomes a horizontal line. You can also check Kotlin Tutorial for beginners.Also, if you are interested in content writing, you can mail us at i did exactly as you have done. (Large preview). This example demonstrates how do I draw text on imagein android. Hi and welcome to another tutorial from Codingdemos, in this tutorial you will learn how to use Android strikethrough text to crossed out the text in the TextView and the Button. Using StaticLayout.toString() comes to mind, but this means we would need to instantiate it first, which we don’t want to do if there’s a cached version. I hope this post has provided some insight into StaticLayout and how it can be used for multiline text drawing on Canvas. Draw Lines for different measurements around a TextView in Android - ... GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together. To do this, we declare a StaticLayout extension function. So let’s first make the Button clickable by calling setOnClickListener. Prior to this, you need to use the StaticLayout constructors. On the line drawing time android app developer can easily manage the line length. Canvas has existing functions that allow you to draw text, the simplest of which can be seen below: A single line of text is drawn at a given (x, y) origin, taking into account the properties of the Paint (to describe the colors and styles for the drawing eg. A great explanation can be found here. It forms the basis of how classes like TextView fit text within given layout parameters. 6- Now we add the final Button, this Button will be used to strikethrough text in the TextView and Button. Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project. Phew! Unfortunately you can’t just include \n characters in your text, as all whitespace characters are interpreted and drawn as spaces within the single line. The source code for this tutorial is available on GitHub, I hope you find this tutorial helpful and if you have any question please post them in the comment below. Instantiating a StaticLayout in every place would lead to unnecessary bloat. To add to this, the constructors have been deprecated in API Level 28. How to add a line break in an android textView? 9- When you tap on mStrikeText Button we want to cross out the text on both the TextView and the Button. how to fix this. We can now draw multiline text to Canvas in a way that feels very familiar to the existing text drawing functions: Our new drawMultilineText extension function is great to use, but it’s doing something it shouldn’t: it instantiates a new StaticLayout every time it is called. You may even consider an existing algorithm such as the Knuth-Plass Line Wrapping Algorithm. ... paint — the paint which we’re using to draw the line. ). Here you specify the shape you want to draw as Rectangle, then you specify the thickness of Android border and color by using Stroke. Is there a good widget for this. 8- Now we are done with adding those views inside activity_main.xml file, next let’s open file and initialize our views. The major drawback (as mentioned above) is that the text is drawn on a single line. A common use of Canvas is to draw text to a given region of a custom View, Drawable, Bitmap, etc. So how should we go about implementing this? Paint includes handy measureText and breakText functions for splitting up text which you could use. Here android:width and android:color are defines underline stroke and color just like layerlist drawable. Add the line below:-TextView tv=(TextView) v.findViewById(; tv.setPaintFlags(tv.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG); use your reference instead … Other variants of this function exist that allow for specification of start and end positions within the text, drawing along a Path, etc. Following is the example of using multiple EditText controls with different input types like password, phone, etc. Just we need to add an attribute with your TextView that give the spacing with lines. Before we progress, there’s one thing that needs to be discussed… What is TextPaint? Step 2 − Add the following code to res/layout/activity_main.xml. In Android TextView is a widget that allows you to display text. How to add space around table border in HTML? How to dynamically generate line on canvas at application run time on activity screen on button click. Next, we are going to try to draw a line across the center of the TextView. How to add a line break in an Android TextView using Kotlin? While almost all Canvas functions require a Paint parameter, StaticLayout requires a TextPaint. Posted by: admin February 23, 2018 Leave a comment. A single line of text is drawn at a given (x, y) origin, taking into account the properties of the Paint (to describe the colors and styles for the drawing eg. Text Drawing. Using Kotlin extension functions, named parameters and operator overloading has greatly reduced the amount of code and made the end result easier to use. To cross out the text we use Android setPaintFlags method, this method accept flag as a parameter and the flag that we want is called Paint.STRIKE_THRU_TEXT_FLAG . Given that the parameters of the drawMultilineText function essentially describe the uniqueness of a StaticLayout for our purposes, we can create our own key like so: The final implementation provides us with an idiomatic (and, hopefully, performant) way of drawing multiline text to Canvas, which feels at home amongst other Canvas functions. Pass the Canvas object to the draw() method of ShapeDrawable. The first four are pretty obvious and the last one we’ll cover in a minute. Create a new android application using android studio and give names as EditTextExample.In case if you are not aware of creating an app in android studio check this article Android Hello World App. color , textSize , etc. 4- Let’s make some changes to the TextView by giving it a label, some padding, change the text size and lastly make it center. Thankfully, the Android framework provides us with a class that handles all of the complexity for us: Layout (in the android.text package), described as “a base class that manages text layout in visual elements on the screen”. Consider a basic text editor: you usually have options to change the alignment, margins, line spacing, text size and more. It is important to note that some parameters (like color) do not belong directly to StaticLayout, but rather belong to theTextPaint. On Android, we normally use TextView … To achieve this goal, first you need to create a … Find an example for the same at Android Game Example. in LinearLayout to build an android application.. Firstly, instantiate one by obtaining and using a StaticLayout.Builder: A few parameters are required when obtaining the builder: These parameters allow StaticLayout to layout the text appropriately within the bounding width. One approach is to implement a basic LruCache to store/retrieve StaticLayouts for drawing (again making use of the Android KTX library for the lruCache extension function): Now, we only instantiate a StaticLayout on first use of the drawMultilineText function (and put it in the cache), otherwise we get one from the cache: The final piece of the puzzle is deciding what to use as the cacheKey. This is the file that you will use it later to draw Android Textview border. This quickly becomes a complex problem. The spacing between lines of text (includes spacingMult and spacingAdd). Contribute to bravoborja/ReadMoreTextView development by creating an account on GitHub. Separator line is used to separate two views inside android activity with the use of divider line it will make views individually so app user can easily understand both views. We will give it a label, position it in the center of the screen and add some margin-top, so that there is a space between the TextView and the Button. There’s most likely a variety of ways to solve the aforementioned issue. For instance, Canvas provides a method to draw a line, while Paint provides methods to define that line's color. Your email address will not be published. I don’t really want to use an image as it would be hard to match the other components to it. For text that will be edited, use a DynamicLayout, which will be updated as the text changes. When you tap on the button, the text inside the TextView and the Button will have strikethrough text, when you tap again for the second time Android strikethrough text will be removed. Long text will usually need to be drawn on multiple lines, and you may have wanted “paragraph” style text in the first place. Selected Reading color, textSize, etc.). Step 1 - Create a new project in Android Studio, go to File ⇒ New … How to add border on Android TextView. The existing Canvas text drawing functions are simple and powerful but aren’t without their limitations. It also includes full backwards compatibility and all of the available StaticLayout properties. By the end of this article, we will have an app that looks like this. Other properties include ellipsize, maxLines, indents and more. Many other parameters can be appended to the builder to adjust the end appearance, but we’ll get to those later. However, there are a lot of parameters that you can provide to change the appearance of the end result. Android Ratingbar Example – Adding Rating Stars in Your App, Android Profile Page Design in XML Tutorial, Android Firebase UI – How to Use Firebase Phone Auth, Android Developer Options – Must Know Options For Devs, Android Loading View – Add Spinner And Dot Loading Animation, Android Toast Message – Custom Toast With Icon And Color.

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