Develop Reference

90º rotated textview gets size to display text as the horizontal space

I have a textview where I want to show text in vertical (just like rotated 90º). With android:rotation="-90" you can get this.
If the text would have no rotation, and you would like to fit a sentence, you would first look at the width of the textview, since text will try to be in 1 line. Since I rotate the text, here I expect to see the height of the object. However, Android is still considering the width. I need to fix the size of the width, but this causes me a problem for the text: Although the textview has a big vertical dimension and text would fit, Android thinks it needs to use the width to calculate the available space. At the end this causes me overflow of the text, appearing for example, just one word as multiple lines of 1 char.
How can I make android to understand that the space for the lenght to fit the text is now the vertical, instead of the horizontal?

How to show large text without "Font size too large to fit in cache" and not broken shared-element transition

I have shared element transition for TextView with some text. Text size changes from 25sp to 200sp.
If text contains colored Emoji (☺) I get "Font size too large to fit in cache".
As I know there is android property "ro.hwui.text_large_cache_height" which determine max height of gliph texture, but it is not equal textSize, so I don't know how I can use it.
When I set textview.setLayerType(View.LAYER_TYPE_SOFTWARE, null) - this solve the problem with showing text, but broke the transition - text appears only at the end.
How could it be fixed? Thanks.

Android: Can't make small fontsize on programmatic textviews

I'm using the following method which programatically creates a linearlayout and populates it with two textviews, adds text and then turns it into a drawable that I later use a layer above a shape. However, I've noticed that I can't create a small fontsize - it seems stuck at a minimum size which is relatively.. large, and anything that I specify below that value just seems to make it look increasingly blurry (but still the same size). What could be the reason for this?
This behavior occurs whether or not I used TypedValue.COMPLEX_UNIT_SP.
Edit: This size stays the same even if I specify something ridiculous like:
.setTextSize(TypedValue.COMPLEX_UNIT_SP, 60);
it doesn't get any bigger - it just gets "sharper".
Edit 2: If I specify the top textview as having a very large size, then the smaller I set the second textview, the smaller it becomes - as a ratio (for example, if I set the top at 100 and the bottom at 50 it looks exactly the same as the top at 10 and the bottom at 5). However, in no way can I reduce the size of the top textview.
Edit 3: If I remove one of the textviews, and leave only the other one as a single textview in the layout - I can't change the size at all. I can only make it more or less blurry depending how low I set the number but it will always appear the exact same size on screen.
private Drawable createTextLayer() {
LinearLayout newLinearLayout = new LinearLayout(getContext());
newLinearLayout.setOrientation(LinearLayout.VERTICAL);
newLinearLayout.setGravity(Gravity.CENTER);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT);
newLinearLayout.setBackgroundColor(getColor(R.color.somecolor));
newLinearLayout.setLayoutParams(layoutParams);
TextView headlinetv = new TextView(getContext());
TextView bodytv = new TextView(getContext());
headlinetv.setText(headlineText);
headlinetv.setTextSize(7);
headlinetv.setGravity(Gravity.CENTER);
bodytv.setText(bodyText);
bodytv.setTextSize(6);
bodytv.setGravity(Gravity.CENTER);
newLinearLayout.addView(headlinetv);
newLinearLayout.addView(bodytv);
newLinearLayout.setDrawingCacheEnabled(true);
newLinearLayout.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED),
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
newLinearLayout.layout(0, 0, newLinearLayout.getMeasuredWidth(), newLinearLayout.getMeasuredHeight());
newLinearLayout.buildDrawingCache(true);
Bitmap b = Bitmap.createBitmap(newLinearLayout.getDrawingCache());
newLinearLayout.setDrawingCacheEnabled(false);
return new BitmapDrawable(getResources(), b);
}

Change your code to:
textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, 7);
Change the font size of 7 to any font size as you wish.

This turned out to be quite tricky and took me several hours to solve, but I'm posting the answer for anyone else who ends up in a similar situation.
The cause:
The entire drawable layer was the uppermost layer above a shape, and was therefore stretched to the size of the shape no matter what. In order to stretch it to the size of the shape, the largest view was stretched (essentially, the longest textview) and therefore couldn't be enlarged or reduced in size.
The solution:
I defined two more textviews, gave them the longest string by 1 character, and made the textcolor transparent. I would have preferred to give them blank space as content but android refused to measure a textview containing whitespace, so it had to be actual text. I put one textview at the top and one at the bottom and thus the visible text appears perfectly centered and in the correct font size.
Edit:
There turns out to be a better way of doing this. Define the textview as the same size as the shape on which it sits as a layer and define padding around the textview (play around with it to find the minimal amount of padding needed). If you have several textviews, divide the size of the shape by the number of textviews and give each one a fraction.

Check if a TextView is completely visible

I have a ListView with an adapter attached. The data behind it is a couple of articles. The articles have a title and a subtitle, the length of both varies.
Sometimes the text of either one is so long that the TextView doesn't fit the View created by the adapter which has a fixed height.
Is there a possibility to find out if both TextViews are completely visible within the View?
I know I would have to wait for the layout to be drawn, would do it with getViewTreeObserver().addOnGlobalLayoutListener(...)

It seems like you can only completely fit two lines per title and subtitle. If I were you, I'd measure the length of the text with the paint that's used to draw it and see if it's less than (width of line) * (number of lines).
For example, consider the following:
boolean doesTitleFitBounds = titleTextView.getPaint().measureText(titleText) < (TITLE_LINE_WIDTH * TITLE_NUM_ROWS);
where TITLE_LINE_WIDTH is the available width for your text in pixels (accounting for paddings/margins etc) and TITLE_NUM_ROWS is the number of rows you have per title.
Similarly, you can do a check for the subtitle to see if it fits its own bounds.

how do I automatically adjust textSize in android?

I am writing an app, in which part of it displays a line of text. there are certain scenarios where that line of text will take up more than one line. the problem is that I only want it to take up one line, and when I set it up either in java or in xml to only take up one line, the text is cut off. how would I make it so that it automatically adjusts the font size of the text so that it will only take up one line without being cut off?

Use proportions along with Paint.measureText():
(text size / measureText width) = (perfectSize / screenWidth)
Solving for the perfect text size:
perfectSize = (text size / measureText width) * screenWidth;
You can find the screen width with getWindowManager().getDefaultDisplay().getWidth() from the Display class.
Turned it into a math problem!

This isn't too hard to do if you use Paint#measureText.
Basically you would start with a font height smaller than the height of your TextView and then iterate (or do a binary search) through fonts of varying sizes until you find one that measures to smaller than the width of your TextView.
It requires some implementation, as there is no "automatic" way provided by the framework.