Justifying text in Android

Question

I need to justify some text (RTL), which is a string (S1) from the server. But a TextView can\'t justify text, so I have to use a WebView

Answer 1

i made simple class.
this can be used just like TextView

import android.content.Context;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.widget.TextView;

/**
 * text justifying
 * you can just use like TextView
 * @author hyunsikkim
 *
 */
public class JustifiedTextView extends TextView {

public JustifiedTextView(Context context) {
    super(context);
}

public JustifiedTextView(Context context, AttributeSet attrs) {
    super(context, attrs);
}

private void setBreakText(String text) {
    if(text == null) return;

    String breakText = breakText(getPaint(), text, 
            getWidth()-this.getPaddingLeft()-this.getPaddingRight());

    if(breakText.equals(getText()) == false) {
        setText(breakText);
    }
}

public String breakText(Paint textPaint, String strText, int breakWidth) { 
    StringBuilder sb = new StringBuilder(); 
    int endValue = 0; 
    final String NEW_LINE = "\n";
    do{ 
        endValue = textPaint.breakText(strText, true, breakWidth, null); 
        if(endValue > 0) {
            /**
             * handle if text contains NEW_LINE
             */
            final int index = strText.indexOf(NEW_LINE);
            if(0<=index && index <= endValue) {
                endValue = index + NEW_LINE.length();
            }
            final String sub = strText.substring(0, endValue);
            sb.append(sub);
            /**
             * handle breaked text endWidth NEW_LINE
             */
            if(sub.endsWith(NEW_LINE) == false) {
                if(strText.length() != endValue) {
                    sb.append(NEW_LINE);
                }
            }

            strText = strText.substring(endValue); 
        } 
    } while(endValue > 0);
    return sb.toString();
} 

public String breakText(Paint textPaint, int id, int breakWidth) {
    String strText = getResources().getString(id);
    return breakText(textPaint, strText, breakWidth);
}

@Override
protected void onTextChanged(CharSequence text, int start,
        int lengthBefore, int lengthAfter) {
    super.onTextChanged(text, start, lengthBefore, lengthAfter);
    /**
     * this control changes from setText(Charsequence text)
     */
    if(getWidth() != 0) {
        setBreakText(text.toString());
    }
}

@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
    super.onSizeChanged(w, h, oldw, oldh);
    /**
     * this help to break initial text.
     */
    if(w != oldw) {
        setBreakText(getText().toString());
    }
}


}