Is it possible to set TextView's text size to be the same as TextView height, when TextView height isn't predefined(WRAP_CONTENT or FILL_PARENT)?
solution : Auto Scale TextView Text to Fit within Bounds
i also wanted to do something like this and the closest you can seem to get is to say android:textSize=20dp (or whatever size you think is appropriate) for either your style or each element that is displaying text. since dp is device independent pixels, if it appears to be taking up the whole screen on your device, then it is supposed to appear that way on all other devices too. you might want to check on this as you might have to choose a different dp value for each of the different size/density combinations possible (depending on what kind of devices you are aimed at, also whether you are allowing the use to change the orientation) this has all that info.
I've found the library that do exactly what I want : SizeAdjustingTextView
Related
So I have read possibly everything about the difference between sp and dp. I can say that I do understand why sp is better than dp regarding text size. One thing I don't understand and want some help with is how do I make the text look the same with every possible font size the user has selected for their phone? Is it that bad to use dp for text size? (I know that the app won't take the user's phone font size into consideration but at least it will look the same across the board.) Any advice would be appreciated.
To make the text look the same irrespective of the users' choice, use dp. To change the text size according to users' choice use sp. So, if you have a constraint that the text size should remain the same use dp.
Is not bad at all to use DP as text size. It just won't follow the users preferences regarding text size. We have to use the tools we have, to best fit our needs. I always use DP in elements wich i need to maintain the layout. If you don't want the text size to change, use DP. Some times i use textAutosizing When the text changes. And often i use sp, when dealing with "content" text, wich can grow and scroll, shrink and fit.
I have read all about supporting different screens and I understand the concept of Density Pixels (DP). However one thing I am not sure about. Lets say I have an image file which is 200 by 200 pixels and I loaded it using xml with wrap_content attributes at the top left of the screen (0,0). Now let's say I want to place a textview programmatically beside it.
If I put the text view at coordinates (250,0). Does that mean that the text view will never overlap the image and will always be to the right no matter what the device density/screen size is.
I understand the distance ( gap) will be different but I am hoping my theory of not overlapping will hold.
I tried it on 2 device and no issues but I am not sure if this is coincendence
Thanks
If you are using px unit it will always remain the same. But if you are using dp unit instead of pixel you cannot definitely be sure.
By the way you should use toRightOf property instead of this approach if you only want this.
Ok I know that there are already many questions that ask the same thing as what I am asking, however the problem is that none of those solutions have worked for me or are what I want. My problem is that when I use the setTextSize method of the Paint class, the text appears to be too big on smaller screens, and smaller on bigger screens. What I want is for me to be able to change it to the size I want on my device, and then on any other device the size should change accordingly (scale down, scale up) and it should appear the same way (NOT the same size) on other devices. And I have already tried multiplying the density by the dp I want and all that other stuff but it doesn't work.
First off, any size you use should be based off of sp- scaled pixels. Units in sp scale with respect to the user defined default size. This is to people who are hard of seeing can choose a larger text size, and all text will scale relative to this choice. You should not be designing text in either dp or in px, as neither of those will scale with the system font size. When you call getTextSize/setTextSize it should be treated as sp.
As for it looking the exact same on all screens- you're not going to get that, because different OEMs use different default heights and different default fonts, not to mention the user can override either of those. Pixel perfect should not be your goal. Which is good, because it isn't actually possible.
I am writing an app about eye test. It is necessary to set the standard text size. I used the following code but it showed what I did not expect.
Typeface type=Typeface.createFromAsset(getAssets(),"Optotypes.ttf");
textView2.setTypeface(type);
textView2.setTextSize(TypedValue.COMPLEX_UNIT_MM,25);
textView2.setText(randomLetter);
I expected the textview show a 2.5cm letter but it is not the exact length/height still.
This situation appear also on different device.
The next problem is that the size is different between the original font and ttf I added. (the original font didn't show the text with 2.5cm also.
Is my code wrong or anything else i missed ? Thanks guys . it is important to me.
I think you're missing how Android handles text sizes.
In Android, you should specify text size in SP units, so Android can scale it accordingly to the user's font size preferences. Never specify hardcoded pixels or centimeters.
Check this references for documentation on the subject:
http://developer.android.com/guide/topics/resources/more-resources.html#Dimension
http://developer.android.com/reference/android/widget/TextView.html#attr_android:textSize
What is the difference between "px", "dp", "dip" and "sp" on Android?
If you want to set the text size in SP programatically, you can do this
// same as android:textSize="15sp" in XML
textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, 15);
-- EDIT
Keep in mind that by just setting a certain text size it doesn't mean that every letter will be of that size. Remember that there are multiple letters with multiple sizes. For instance, with a size of 20mm, this is what you get
Because Android needs to accommodate every possible character in a textview with the size you provided. That being said, textSize is not 100% accurate to what you provide to it.
If this is not enough for you, please provide more details of the problem you have at hands.
I'm developing an Android app targeting Android 2.3 (API9).
I want to resize the height of a simple EditText but when I set android:layout_height="10pt" the border of the EditText becomes dislocated.
The problem is shown here
I tried layout_height, height, textsize.. pt, px, sp... but the same problem.
I haven't tried the application on real device yet.
What layout contains the EdiText? You should never use exact pixel sizes when configuring items in Android, since your layout needs to work properly at many different screen sizes and densities. (See supporting multiple screens for details).
If you really want a specific size, us dp for density independent pixels. It should work to set the layout_height="10dp" However, that won't increase the size of the text within the EditText. You need to use textSize for that. You are probably better off setting textSize and setting the layout_height="wrap_content".
See this similar question about the extra line. It looks like setting a background color might fix that.
I have been having the same sort of problem (and it's a real pain). With some experimentation I have found that if you use "dp" and apply this rule of thumb, it should work for EditText fields.
textSize x 3= layout_height
I say rule of thumb because the minimum height before the field "breaks" again is about 29dp. So, for example if you have textSize="10dp", then layout_height="30dp", or textSize="12dp", then layout_height="36dp". You can have smaller textSizes, but it becomes illegible lower than 9dp. I found this works well in relative_layouts with default fonts. Good luck!