Set Text View ellipsize and add view more at end

Question

I am trying to set ellipsize of text view. using the following code. I want to add \"view more\" at the end of truncated string after 3 dots. If this would be possible with

Answer 1

In the above solution, Expanded text (see more/less) showing, if the length of the text is less than max lines. In this class, I remove this error. You just need to put this class into your code and use it in XML. You can easily modify it according to your requirements (color of expanded text, font style, etc.)

      public class ExpandableTextView extends AppCompatTextView {

    private static Context context;
    private TextView textView;
    private int maxLine = 3;
    private boolean isViewMore = true;

    public ExpandableTextView(Context context) {
        super(context);
        ExpandableTextView.context = context;
        textView = this;
        initViews();
    }

    public ExpandableTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        ExpandableTextView.context = context;
        textView = this;
        initViews();
    }

    public ExpandableTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        ExpandableTextView.context = context;
        textView = this;
        initViews();
    }

    public void initViews() {
        if (textView.getText().toString().isEmpty()) {
            return;
        }
        if (textView.getTag() == null) {
            textView.setTag(textView.getText());
        }
        textView.setTypeface(Typeface.createFromAsset(context.getAssets(), "GothamBook.ttf"));
        ViewTreeObserver vto = textView.getViewTreeObserver();
        vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @SuppressWarnings("deprecation")
            @Override
            public void onGlobalLayout() {
                String text, expandText = "See ";
                int lineEndIndex;
                ViewTreeObserver obs = textView.getViewTreeObserver();
                obs.removeGlobalOnLayoutListener(this);
                int lineCount = textView.getLayout().getLineCount();

                expandText += isViewMore ? "More" : "Less";
                if (lineCount <= maxLine) {
                    lineEndIndex = textView.getLayout().getLineEnd(textView.getLayout().getLineCount() - 1);
                    text = textView.getText().subSequence(0, lineEndIndex).toString();
                } else if (isViewMore && maxLine > 0 && textView.getLineCount() >= maxLine) {
                    lineEndIndex = textView.getLayout().getLineEnd(maxLine - 1);
                    text = textView.getText().subSequence(0, lineEndIndex - expandText.length() + 1) + " " + expandText;
                } else {
                    lineEndIndex = textView.getLayout().getLineEnd(textView.getLayout().getLineCount() - 1);
                    text = textView.getText().subSequence(0, lineEndIndex) + " " + expandText;
                }
                textView.setText(text);
                textView.setMovementMethod(LinkMovementMethod.getInstance());
                if (lineCount > maxLine)
                    textView.setText(addClickablePartTextViewResizable(expandText),
                            BufferType.SPANNABLE);
                textView.setSelected(true);
            }
        });
    }

    private SpannableStringBuilder addClickablePartTextViewResizable(final String expandText) {
        String string = textView.getText().toString();
        SpannableStringBuilder expandedStringBuilder = new SpannableStringBuilder(string);
        if (string.contains(expandText)) {
            expandedStringBuilder.setSpan(new ClickableSpan() {
                @Override
                public void onClick(View widget) {
                    textView.setLayoutParams(textView.getLayoutParams());
                    textView.setText(textView.getTag().toString(), BufferType.SPANNABLE);
                    textView.invalidate();
                    maxLine = isViewMore ? -1 : 3;
                    isViewMore = !isViewMore;
                    initViews();
                }

                @Override
                public void updateDrawState(@NonNull TextPaint ds) {
                    ds.setUnderlineText(true);
                    ds.setColor(context.getResources().getColor(R.color.red));
                    ds.setTypeface(Typeface.createFromAsset(context.getAssets(), "GothamMedium.ttf"));
                }
            }, string.indexOf(expandText), string.length(), 0);
        }
        return expandedStringBuilder;
    }
}

If you set dynamic data you need to call initViews() after setting the text into the text view.

tvDescription.setText(sessionModel.getDescription());
tvDescription.initViews();