LineTextView.java

package com.tempos21.bluekiwi.ui.view;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.Gravity;
import android.widget.TextView;

/**
 * Created by Bernat Borrás Paronella on 14/08/2014.
 */
public class LineTextView extends TextView {
    private Paint mPaint;
    private Rect mRect;

    public LineTextView(Context context) {
        super(context);
        init();
    }

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

    public LineTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }

    private void init() {
        isInEditMode();
        setGravity(Gravity.CENTER);
        mPaint = new Paint();
        mPaint.setAntiAlias(true);
        mPaint.setStyle(Paint.Style.FILL_AND_STROKE);
        mPaint.setStrokeWidth(1f);

        mRect = new Rect();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        mPaint.setColor(getCurrentTextColor());

        canvas.getClipBounds(mRect);

        float centerX = mRect.centerX();
        float centerY = mRect.centerY();

        float measuredText = mPaint.measureText(getText().toString());

        canvas.drawLine(mRect.left, centerY, centerX - measuredText - 30, centerY, mPaint);
        canvas.drawLine(centerX + measuredText + 30, centerY, mRect.right, centerY, mPaint);

    }

    @Override
    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
        super.onTextChanged(text, start, lengthBefore, lengthAfter);
        invalidate();
    }

    @Override
    public void setText(CharSequence text, BufferType type) {
        super.setText(text, type);
        invalidate();
    }
}