UnderlineTextView

UnderLineTextView.java

package jp.mediaid.nge.library.categories.ui;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.DashPathEffect;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Rect;
import android.os.Build;
import android.util.AttributeSet;
import android.widget.TextView;

import static android.graphics.Paint.ANTI_ALIAS_FLAG;


//
// TextviewUnderlineFill - UnderlineFillTextView
//
// Created by Vin on 6/5/17.
// Copyright (c) 2017 Ominext. All rights reserved.
//

public class UnderlineFillTextView extends TextView {

    private Path path;
    private int colorLine = Color.GRAY;
    private Rect bound;
    private Paint paint;
    float density;

    public UnderlineFillTextView(Context context) {
        super(context);
        initViews();
    }

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

    public UnderlineFillTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initViews();
    }

    private void initViews() {
        density = getResources().getDisplayMetrics().density;
        path = new Path();
        paint = new Paint(ANTI_ALIAS_FLAG);
        paint.setStrokeWidth(1f * density);
        paint.setARGB(255, 0, 0, 0);
        paint.setStyle(Paint.Style.STROKE);
        colorLine = getHintTextColors().getDefaultColor();
        paint.setColor(colorLine);
        paint.setPathEffect(new DashPathEffect(new float[]{15, 10}, 0));
        paint.setTextSize(getTextSize());
        paint.setTypeface(getTypeface());
        paint.setAlpha(120);
        setLineSpacing(getLineHeight() / 3f, 1);
        bound = new Rect();
    }

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

    @Override
    protected void onDraw(Canvas canvas) {
        int lines = getLineCount();
        int paddingTop = getPaddingTop();
        int width = getMeasuredWidth();
        int lineHeight = getLineHeight();
        float lineSpecExtra = 0f;
        if (getText().toString().length() > 0) {
            paint.getTextBounds(getText().toString(), 0, getText().toString().length(), bound);
            lineSpecExtra = lineHeight - bound.height();
        }
        float spec = 0f;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
            spec = getLineSpacingExtra();
        }
        for (int i = 1; i < lines  + 1; i++) {
            Path path = new Path();
            path.moveTo(0, lineHeight * i + paddingTop - lineSpecExtra / (lines == i ? 2f : 2f) +  spec / 3f);
            path.lineTo(width, lineHeight * i + paddingTop - lineSpecExtra / (lines == i ? 2f : 2f) + spec / 3f);
            canvas.drawPath(path, paint);
            path.reset();
        }
        setHeight((int) (lineHeight * (lines) + paddingTop - lineSpecExtra/2f + 1f * density + 0.5f + spec / 3f));
        super.onDraw(canvas);
    }
}
//
package jp.mediaid.nge.library.categories.ui;

import android.graphics.Canvas;
import android.graphics.DashPathEffect;
import android.graphics.Paint;
import android.graphics.Path;
import android.text.Layout;
import android.text.style.LineBackgroundSpan;
import android.text.style.LineHeightSpan;
import android.widget.TextView;

import jp.mediaid.nge.R;
import jp.mediaid.nge.application.App;

public class DashedUnderlineSpan implements LineBackgroundSpan, LineHeightSpan {

    private Paint paint;
    private TextView textView;
    private float offsetY;
    private float spacingExtra;

    public DashedUnderlineSpan(TextView textView, int color, float thickness, float dashPath,
        float offsetY, float spacingExtra) {
        this.paint = new Paint();
        this.paint.setColor(color);
        this.paint.setStyle(Paint.Style.STROKE);
        this.paint.setPathEffect(new DashPathEffect(new float[] { dashPath, dashPath }, 0));
        this.paint.setStrokeWidth(thickness);
        this.textView = textView;
        this.offsetY = offsetY;
        this.spacingExtra = spacingExtra;
    }

    public DashedUnderlineSpan(TextView textView, int offsetY) {
        this.paint = new Paint();
        this.paint.setColor(App.get().getResources().getColor(R.color.grayLine));
        this.paint.setStyle(Paint.Style.STROKE);
        this.paint.setPathEffect(new DashPathEffect(new float[] { App.get().getResources().getDimension(R.dimen.dimen5dp), App.get().getResources().getDimension(R.dimen.dimen5dp) }, 0));
        this.paint.setStrokeWidth(App.get().getResources().getDimension(R.dimen.dimen1dp));
        this.textView = textView;
        this.offsetY = offsetY;
        this.spacingExtra = App.get().getResources().getDimension(R.dimen.dimen2dp);
    }

    @Override
    public void chooseHeight(CharSequence text, int start, int end, int spanstartv, int v,
        Paint.FontMetricsInt fm) {
        fm.ascent -= spacingExtra;
        fm.top -= spacingExtra;
        fm.descent += spacingExtra;
        fm.bottom += spacingExtra;
    }

    @Override
    public void drawBackground(Canvas canvas, Paint p, int left, int right, int top, int baseline,
        int bottom, CharSequence text, int start, int end, int lnum) {
        int lineNum = textView.getLineCount();
        for (int i = 0; i < lineNum; i++) {
            Layout layout = textView.getLayout();
            Path path = new Path();
            path.moveTo(left, layout.getLineBottom(i) - spacingExtra + offsetY);
            path.lineTo(right, layout.getLineBottom(i) - spacingExtra + offsetY);
            canvas.drawPath(path, this.paint);
        }
    }
}