How to set Text Alignment Justified for the text ? #30

Activity

1. aci9evil commented on Mar 20, 2021

   

   aci9evil

   on Mar 20, 2021

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   private static void justify(final TextView textView) {

       final AtomicBoolean isJustify = new AtomicBoolean(false);
   
       final String textString = textView.getText().toString();
   
       final TextPaint textPaint = textView.getPaint();
   
       final SpannableStringBuilder builder = new SpannableStringBuilder();
   
       textView.post(() -> {
   
           if (!isJustify.get()) {
   
               final int lineCount = textView.getLineCount();
               final int textViewWidth = textView.getWidth() - 1;
   
               for (int i = 0; i < lineCount; i++) {
   
                   int lineStart = textView.getLayout().getLineStart(i);
                   int lineEnd = textView.getLayout().getLineEnd(i);
   
                   String lineString = textString.substring(lineStart, lineEnd);
   
                   if (i == lineCount - 1) {
                       builder.append(new SpannableString(lineString));
                       break;
                   }
   
                   String trimSpaceText = lineString.trim();
                   String removeSpaceText = lineString.replaceAll(" ", "");
   
                   float removeSpaceWidth = textPaint.measureText(removeSpaceText);
                   float spaceCount = trimSpaceText.length() - removeSpaceText.length();
   
                   float eachSpaceWidth = (textViewWidth - removeSpaceWidth) / spaceCount;
   
                   SpannableString spannableString = new SpannableString(lineString);
                   for (int j = 0; j < trimSpaceText.length(); j++) {
                       char c = trimSpaceText.charAt(j);
                       if (c == ' ') {
                           Drawable drawable = new ColorDrawable(0x00ffffff);
                           drawable.setBounds(0, 0, (int) eachSpaceWidth, 0);
                           ImageSpan span = new ImageSpan(drawable);
                           spannableString.setSpan(span, j, j + 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
                       }
                   }
   
                   builder.append(spannableString);
               }
   
               textView.setText(builder);
               isJustify.set(true);
           }
       });
   }