justify TextView - Android User Interface

Android examples for User Interface:TextView

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Description

justify TextView

Demo Code


//package com.java2s;
import android.graphics.Paint;
import android.text.TextUtils;
import android.widget.TextView;
import java.util.ArrayList;

public class Main {
    public static String justify(TextView textView, float contentWidth) {
        String text = textView.getText().toString();
        String tempText;//from   w w w .ja  va 2 s.  co m
        String resultText = "";
        Paint paint = textView.getPaint();

        ArrayList<String> paraList = new ArrayList<String>();
        paraList = paraBreak(text);
        for (int i = 0; i < paraList.size(); i++) {
            ArrayList<String> lineList = lineBreak(paraList.get(i).trim(),
                    paint, contentWidth);
            tempText = TextUtils.join(" ", lineList).replaceFirst("\\s*",
                    "");
            resultText += tempText.replaceFirst("\\s*", "") + "\n";
        }

        return resultText;
    }

    public static ArrayList<String> paraBreak(String text) {
        ArrayList<String> paraList = new ArrayList<String>();
        String[] paraArray = text.split("\\n+");
        for (String para : paraArray) {
            paraList.add(para);
        }
        return paraList;
    }

    private static ArrayList<String> lineBreak(String text, Paint paint,
            float contentWidth) {
        String[] wordArray = text.split("\\s");
        ArrayList<String> lineList = new ArrayList<String>();
        String myText = "";

        for (String word : wordArray) {
            if (paint.measureText(myText + " " + word) <= contentWidth)
                myText = myText + " " + word;
            else {
                int totalSpacesToInsert = (int) ((contentWidth - paint
                        .measureText(myText)) / paint.measureText(" "));
                lineList.add(justifyLine(myText, totalSpacesToInsert));
                myText = word;
            }
        }
        lineList.add(myText);
        return lineList;
    }

    private static String justifyLine(String text, int totalSpacesToInsert) {
        String[] wordArray = text.split("\\s");
        String toAppend = " ";

        while ((totalSpacesToInsert) >= (wordArray.length - 1)) {
            toAppend = toAppend + " ";
            totalSpacesToInsert = totalSpacesToInsert
                    - (wordArray.length - 1);
        }
        int i = 0;
        String justifiedText = "";
        for (String word : wordArray) {
            if (i < totalSpacesToInsert)
                justifiedText = justifiedText + word + " " + toAppend;

            else
                justifiedText = justifiedText + word + toAppend;

            i++;
        }

        return justifiedText;
    }
}

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