Develop Reference

Find text size for TextView

I'm using a (horizontal) PagerView which shows 1 page on the screen, the user can switch pages by swiping left or right.
Every page holds several views in a RelativeLayout, one of them is a description text in a TextView (its size is calculated with weight).
I want the description text to be in the same font size for all pages.
This needs to be according to the longest description (the TextViews in all the pages are in the same height).
I have an array of all the descriptions in advance but I don't have rendered TextViews since they are in different pages and android won't draw it until scrolled to the page.
Any idea how the correct font size could be calculated?

Found the solution so just sharing.
This is easily implemented using StaticLayout. When creating StaticLayout you assign its width and can check its height (it will automatically start the text in a new line if it's too long).
Just iterate over your "texts array", for every line of text create a StaticLayout with your desired width and make sure it's height fits inside your TextView height, if not, decrease the font size and recheck. You'll eventually get the largest font size that fits the TextView size.

Get the 1st textview text size & typeface. Then set that size and typeface to other textviews. Or you can get height & width of the textview & set that to others.
float size = textView1.getTextSize(); //get the size of the textview text
textView2.setTextSize(size) //set the size for other textview's texts
//if you want look in same size, all text must have same TypeFace(Font). To do that use.
textView1.getTypeFace();
textView2.setTypeFace();
//or you can get hight & width of the textview.
textView.setText("GetHeight");
textView.measure(0, 0); //must call measure!
textView.getMeasuredHeight(); //get height
textView.getMeasuredWidth(); //get width
//set textview height & width
LayoutParams params = (LayoutParams) textView.getLayoutParams();
params.height = 70;
params.width = 100;
textView.setLayoutParams(params);

Text width in a textview android

I am new to Android.. I have a textview with size 250dp.. I am trying to calculate the text width inside it.. But I could not find any API that returns the actual content width.. Can someone help how it can be done.
Thanks in advance.

You can use the Paint object held by the TextView to measure the width of the text contents:
CharSequence text = textView.getText();
float width = textView.getPaint().measureText(text, 0, text.length());
There is also a version that measures the full bounds (left/right/top/bottom) of the text contents:
Rect bounds = new Rect();
CharSequence text = textView.getText();
textView.getPaint().getTextBounds(text, 0, text.length(), bounds);
//bounds now contains the rect of the actual text string
int width = bounds.getWidth();

The Devunwired answer is completely right.
However, it's useful the reader to know that the text width measure in pixels don't need to be linked with any real content of a TextView or EditText and isn't restricted to the view widht, so one can simulate if a determinated text fits well in the view before set the view with a text.
Besides, if one uses the whole string you don't need to specify a initial index and a final index (exclusive).
So one can write
float width = textView.getPaint().measureText("my favorite fruit is a banana");
It works smoothly

There is no API for this.first you have to find the text size and find lenth of string.finally multipl both you will get width of text in textview.

Get size of UI before actually creating one?

I am working on an Android app that is largely driven by code, not xml.
The Adapter for a ListView wants to know the height of the item. But this in turn could depend on the size of UI elements within the item. For example, if the item contains a checkbox, the size of the checkbox could influence the layout of the list item, which in turn could change the height, depending on whether or not a line wrap became necessary.
Question -- is there a way to get the size of an Android UI element without actually creating it? Similar to the way one can use a Paint or TextPaint object to get the size of text before it is drawn.

Without creating it? No, but you could use the MeasureSpec class and measure the View manually after you create it. Why do you need to know the exact size? Can't you just set the LayoutParams to MATCH_PARENT (width) and WRAP_CONTENT (height) for your case?
That said, if you do need to know, you could use the width of your ListView for the width MeasureSpec, and then UNSPECIFIED for the height MeasureSpec:
// Tell the View it should be exactly as wide as the ListView...
int widthSpec = MeasureSpec.makeMeasureSpec(listViewWidth, MeasureSpec.EXACTLY);
// ... and as tall as it wants to be ...
int heightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
// ... measure it with these constraints ...
item.measure(widthSpec, heightSpec);
// ... and retrieve the measured height.
int itemHeight = item.getMeasuredHeight();

Android multiline TextView , check if text fits , or check is TextView is full

I have an Android application layout which contains a multiline TextView. When the screen is in portrait orientation, the TextView can display a different length of text to when running in landscape mode. Also when running on a small screen, the TextView can display a different length of text to when running on a larger screen.
Is there any way I can check if the text fits or will be truncated? Or is there any way I can check if the TextView if full?
The problem is the TextView can potentially contain a different number of lines, depending on whether it is landscape, portrait, small screen, large screen, etc.
Thank you for your advice,
Best regards,
James

These answers didn't work very well for me. Here's what I ended up doing
Paint measurePaint = new Paint(myTextView.getPaint());
float pWidth = measurePaint.measureText("This is my big long line of text. Will it fit in here?");
float labelWidth = myTextView.getWidth();
int maxLines = myTextView.getMaxLines();
while (labelWidth > 0 && pWidth/maxLines > labelWidth-20) {
float textSize = measurePaint.getTextSize();
measurePaint.setTextSize(textSize-1);
pWidth = measurePaint.measureText("This is my big long line of text. Will it fit in here?");
if (textSize < TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_SP, 7,
getContext().getResources().getDisplayMetrics())) break;
}
myTextView.setTextSize(TypedValue.COMPLEX_UNIT_PX, measurePaint.getTextSize());
I'm not saying this will work for every situation as I'm certainly cutting corners here, but the general idea is to measure the text with the textview's paint and keep shrinking it until it will fit inside the textview.

I have found a "cheeky" solution to the problem of measuring the height of the text in a MULTILINE TextView :-
//Calculate the height of the text in the MULTILINE TextView
int textHeight = textView.getLineCount() * textView.getLineHeight();
if (textHeight > textViewHeight) {
//Text is truncated because text height is taller than TextView height
} else {
//Text not truncated because text height not taller than TextView height
}
However this solution has some caveats :-
Firstly regarding getLineHeight() , markup within the text can cause individual lines to be taller or shorter than this height, and the layout may contain additional first- or last-line padding. See http://developer.android.com/reference/android/widget/TextView.html#getLineHeight()
Secondly , the application needs to calculate the actual height of the TextView in pixels , and (in the case of my layout) it might not be as simple as textView.getHeight() , and calculation may vary from one layout to another layout.
I would recommend avoiding LinearLayout because the actual pixel height of the TextView can vary depending on text content. I am using a RelativeLayout (see http://pastebin.com/KPzw5LYd).
Using this RelativeLayout, I can calculate my TextView height as follows :-
//Calculate the height of the TextView for layout "http://pastebin.com/KPzw5LYd"
int textViewHeight = layout1.getHeight() - button1.getHeight() - button2.getHeight();
Hope that helps,
Regards,
James

Basically, you need to calculate the size of your textview and the size of your text when the orientation mode changed. Try ViewTreeObserver.OnGlobalLayoutListener to do so.
Inside the change orientation method:
main_view.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
main_view.getViewTreeObserver().removeGlobalOnLayoutListener(this);
//Calculation goes here
int text_size = getTextSize(text_view.getText().toString());
int text_view_size = text_view.getLayoutParams().width;
//Compare your text_size and text_view_size and do whatever you want here.
}
});
Here is the code of calculate the text_size:
private int getTextSize(String your_text){
Paint p = new Paint();
//Calculate the text size in pixel
return p.measureText(your_text);
}
Hope this help.

For checking whether a multiline (or not) TextView is going to be truncated, check this post.
Or, have you looked into using a scrolling textview? (marquee).. where the text will scroll by (horizontally, animated) if it is too long for a given width?
Here is an example TextView in a layout file, that has some of these characteristics:
<TextView
android:id="#+id/sometextview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ellipsize="marquee"
android:marqueeRepeatLimit="marquee_forever"
android:singleLine="true"
android:scrollHorizontally="true"
android:focusable="true"
android:focusableInTouchMode="true"
android:freezesText="true"
android:textColor="#808080"
android:textSize="14sp"
android:text="This is a long scrolling line of text.. (etc)"/>

This extension function in Kotlin worked for me, just make sure to call it when the view is already laied out, e.g. view.post() is a good place for me;
/**
* Make sure to call this method only when view layout is finished, e.g. view.post() is a good place to check this
*/
fun TextView.isTruncated() = (lineCount * lineHeight) > height
Usage
textView.post {
if(isTruncated()) {
// Do something
}
}

Just check textView.getLineCount(), if line count > 1 then your text is multiline

Get the size of a text in TextView

I have a problem placing a textView at specified center's x and y coordinates.
Firstly, I tried to set the text in the textView, and to move the view with the width and the height of the view
from this link.
But it doesn't work, and I'd like to try something else.
I'd like to know if there is a method to get the size which a specified text will take in my textView?
I mean, I know the text and the textSize, how can I get the width and the height my textView will take?
Something like the method (NSString)sizeWithFont; for those who know iPhone dev.

Rect bounds = new Rect();
textView.getPaint().getTextBounds(textView.getText().toString(), 0, textView.getText().length(), bounds);
bounds.width() will give you the accurate width of the text in the Text View.

If your textview is called tv
tv.setText("bla");
tv.measure(0, 0); //must call measure!
tv.getMeasuredHeight(); //get height
tv.getMeasuredWidth(); //get width
More on this (updated): How to get width/height of a View

For some reason the solution of Midverse Engineer does not give me always correct results (at least on some Android versions). The solution of Sherif elKhatib works, but has the side effect of changing MeasuredWidth and Height. This could lead to incorrect positioning of the textView.
My solution:
width = textView.getPaint().measureText(text);
metrics = textView.getPaint().getFontMetrics();
height = metrics.bottom - metrics.top;

Using the TextView inner Paing class is not so hot when you have multiple lines of text and different paddings. So stop trying to reinvent the wheel. Use getMeasuredHeight and getMeasuredWidth methods after calling measure(UNSPECIFIED, UNSPECIFIED). Just don't forget to get the new values inside the post, otherwise mostly you'll get a wrong result.
tv.setText(state.s);
tv.measure(UNSPECIFIED,UNSPECIFIED);
tv.post(new Runnable() {
#Override
public void run() {
Log.d("tv","Height = "+tv.getMeasuredHeight());
Log.d("tv","Width = "+tv.getMeasuredWidth());
}
});