How do I tell if my textview has been ellipsized?

Question

I have a multi-line TextView that has android:ellipsize="end" set. I would like to know, however, if the string I place in there is actually too long (so that I may make sure the full string is shown elsewhere on the page).

I could use TextView.length() and find about what the approximate length of string will fit, but since it's multiple lines, the TextView handles when to wrap, so this won't always work.

Any ideas?

Answer 1

You can get the layout of the TextView and check the ellipsis count per line. For an end ellipsis, it is sufficient to check the last line, like this:

Layout l = textview.getLayout();
if (l != null) {
    int lines = l.getLineCount();
    if (lines > 0)
        if (l.getEllipsisCount(lines-1) > 0)
            Log.d(TAG, "Text is ellipsized");
}

This only works after the layout phase, otherwise the returned layout will be null, so call this at an appropriate place in your code.

Answer 2

textView.getLayout is the way to go but the problem with that is that it returns null if layout is not prepared. Use the below solution.

 ViewTreeObserver vto = textview.getViewTreeObserver();
    vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
           Layout l = textview.getLayout();
           if ( l != null){
              int lines = l.getLineCount();
              if ( lines > 0)
                  if ( l.getEllipsisCount(lines-1) > 0)
                    Log.d(TAG, "Text is ellipsized");
           }  
        }
    });

Answer 3

I think the easiest solution to this question is the following code:

String text = "some looooong text";
textView.setText(text);
boolean isEllipsize = !((textView.getLayout().getText().toString()).equalsIgnoreCase(text));

This code assumes that in your XML the TextView set a maxLineCount :)

Answer 4

This worked to me:

textView.post(new Runnable() {
                        @Override
                        public void run() {
                            if (textView.getLineCount() > 1) {
                                //do something
                            }
                        }
                    });

Answer 5

public int getEllipsisCount (int line):

Returns the number of characters to be ellipsized away, or 0 if no ellipsis is to take place.

So, simply call :

int lineCount = textview1.getLineCount();

if(textview1.getLayout().getEllipsisCount(lineCount) > 0) {
   // Do anything here..
}

Since the getLayout() cant be called before the layout is set, use this:

ViewTreeObserver vto = textview.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
    @Override
    public void onGlobalLayout() {
       Layout l = textview.getLayout();
       if ( l != null){
          int lines = l.getLineCount();
          if ( lines > 0)
              if ( l.getEllipsisCount(lines-1) > 0)
                Log.d(TAG, "Text is ellipsized");
       }  
    }
});

And finally do not forget to remove removeOnGlobalLayoutListener when you need it nomore.

Answer 6

lateinit var toggleMoreButton: Runnable
toggleMoreButton = Runnable {
  if(reviewTextView.layout == null) { // wait while layout become available
       reviewTextView.post(toggleMoreButton) 
       return@Runnable
  }
  readMoreButton.visibility = if(reviewTextView.layout.text.toString() != comment) View.VISIBLE else View.GONE
}
reviewTextView.post(toggleMoreButton)

It is some typical case:

1. comment in 'reviewTextView'
2. comment can collapsed by some criteria
3. if comment collapsed you show button 'readMoreButton'

Answer 7

it is working for me

if (l != null) {
    int lines = l.getLineCount();
     if (lines > 0) {
     for (int i = 0; i < lines; i++) {
     if (l.getEllipsisCount(i) > 0) {
      ellipsize = true;
      break;
     }
    }
   }
  }

Answer 8

Really work so, for example, to pass full data to dialog from item of RecyclerView:

holder.subInfo.post(new Runnable() {
                @Override
                public void run() {
                    Layout l = holder.subInfo.getLayout();
                    if (l != null) {
                        final int count = l.getLineCount();
                        if (count >= 3) {
                            holder.subInfo.setOnClickListener(new View.OnClickListener() {
                                @Override
                                public void onClick(View view) {
                                    final int c = holder.subInfo.getLineCount();
                                    if (c >= 3) {
                                        onClickToShowInfoDialog.showDialog(holder.title.getText().toString(), holder.subInfo.getText().toString());
                                    }
                                }
                            });
                        }
                    }
                }
            });

Answer 9

The Kotlin way:

textView.post {
   if (textView.lineCount > MAX_LINES_COLLAPSED) {
   // text is not fully displayed
   }
}

Actually View.post() is executed after the view has been rendered and will run the function provided

Answer 10

Using getEllipsisCount won't work with text that has empty lines within it. I used the following code to make it work :

message.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
        @Override
        public boolean onPreDraw() {

            if(m.isEllipsized == -1) {
                Layout l = message.getLayout();
                if (message.getLineCount() > 5) {
                    m.isEllipsized = 1;
                    message.setMaxLines(5);
                    return false;
                } else {
                    m.isEllipsized = 0;
                }
            }
            return true;
        }
    });

Make sure not to set a maxLineCount in your XML. Then you can check for the lineCount in your code and if it is greater than a certain number, you can return false to cancel the drawing of the TextView and set the line count as well as a flag to save whether the text view is too long or not. The text view will draw again with the correct line count and you will know whether its ellipsized or not with the flag.

You can then use the isEllipsized flag to do whatever you require.

Answer 11

create a method inside your TextViewUtils class

public static boolean isEllipsized(String newValue, String oldValue) {
    return !((newValue).equals(oldValue));
}

call this method when it's required eg:

        if (TextViewUtils.isEllipsized(textviewDescription.getLayout().getText().toString(), yourModelObject.getDescription()))
            holder.viewMore.setVisibility(View.VISIBLE);//show view more option
        else
            holder.viewMore.setVisibility(View.GONE);//hide 

but textView.getLayout() can't call before the view(layout) set.