Example usage for android.graphics Canvas drawText

Introduction

In this page you can find the example usage for android.graphics Canvas drawText.

Prototype

public void drawText(@NonNull CharSequence text, int start, int end, float x, float y, @NonNull Paint paint) 

Source Link

Document

Draw the specified range of text, specified by start/end, with its origin at (x,y), in the specified Paint.

Usage

From source file:Main.java

/**
 * Draw text on canvas. Shade if text too long to fit.
 *
 * @param canvas The canvas to draw in./*from w ww .j a v  a 2s . c  om*/
 * @param text The text to draw.
 * @param x The x coordinate.
 * @param y The y coordinate.
 * @param textPaint The paint to draw with.
 * @param availableWidth The available width for the text
 */
public static void drawText(Canvas canvas, String text, float x, float y, TextPaint textPaint,
        int availableWidth) {
    text = text.replaceAll("\\r?\\n", " ");
    final TextPaint localTextPaint = new TextPaint(textPaint);
    final float pixelsToShade = 1.5F * localTextPaint.getTextSize();
    int characters = text.length();

    if (localTextPaint.measureText(text) > availableWidth) {
        Paint.Align align = localTextPaint.getTextAlign();
        float shaderStopX;
        characters = localTextPaint.breakText(text, true, availableWidth, null);
        if (align == Paint.Align.LEFT) {
            shaderStopX = x + availableWidth;
        } else if (align == Paint.Align.CENTER) {
            float[] measuredWidth = new float[1];
            characters = localTextPaint.breakText(text, true, availableWidth, measuredWidth);
            shaderStopX = x + (measuredWidth[0] / 2);
        } else { // align == Paint.Align.RIGHT
            shaderStopX = x;
        }
        // Hex 0x60000000 = first two bytes is alpha, gives semitransparent
        localTextPaint.setShader(new LinearGradient(shaderStopX - pixelsToShade, 0, shaderStopX, 0,
                localTextPaint.getColor(), localTextPaint.getColor() + 0x60000000, Shader.TileMode.CLAMP));
    }
    canvas.drawText(text, 0, characters, x, y, localTextPaint);
}

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From source file:io.github.hidroh.materialistic.widget.AsteriskSpan.java

@Override
public void draw(@NonNull Canvas canvas, CharSequence text, int start, int end, float x, int top, int y,
        int bottom, @NonNull Paint paint) {
    float radius = mPadding;
    float centerX = x + radius + mPadding;
    float centerY = top + radius + mPadding;
    paint.setColor(mBackgroundColor);/*  w w  w. j  av a2  s.c  om*/
    canvas.drawCircle(centerX, centerY, radius, paint);
    paint.setColor(mTextColor);
    canvas.drawText(text, start, end, x + mPadding * 2, y, paint);
}

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From source file:com.madgag.android.lazydrawables.samples.DemoListActivity.java

private ImageResourceDownloader<String, Bitmap> slowImageMaker() {
    return new ImageResourceDownloader<String, Bitmap>() {
        public Bitmap get(String key) {
            Log.d(TAG, "Asked to download " + key);
            try {
                Thread.sleep(4000L);
            } catch (InterruptedException e) {
            }/* w  ww. j  ava  2 s  .co  m*/
            Bitmap bitmap = Bitmap.createBitmap(80, 80, Bitmap.Config.ARGB_8888);
            Canvas c = new Canvas(bitmap);
            Paint paint = new Paint();
            paint.setColor(0xff0000ff);
            c.drawCircle(0, 0, 50, paint);

            paint.setColor(0xffff007f);
            paint.setStyle(Paint.Style.FILL);
            paint.setAntiAlias(true);
            paint.setTextSize(30);
            c.drawText(key, 0, 3, 0, 60, paint);
            Log.d(TAG, "Done drawing... " + key);
            return bitmap;
        }
    };
}

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From source file:com.lamcreations.scaffold.common.utils.CollapsingTextHelper.java

private void ensureExpandedTexture() {
    if (this.mExpandedTitleTexture == null && !this.mExpandedBounds.isEmpty()
            && !TextUtils.isEmpty(this.mTextToDraw)) {
        this.mTextPaint.setTextSize(this.mExpandedTextSize);
        this.mTextPaint.setColor(this.mExpandedTextColor);
        int w = Math.round(this.mTextPaint.measureText(this.mTextToDraw, 0, this.mTextToDraw.length()));
        int h = Math.round(this.mTextPaint.descent() - this.mTextPaint.ascent());
        this.mTextWidth = (float) w;
        if (w > 0 || h > 0) {
            this.mExpandedTitleTexture = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
            Canvas c = new Canvas(this.mExpandedTitleTexture);
            c.drawText(this.mTextToDraw, 0, this.mTextToDraw.length(), 0.0F,
                    (float) h - this.mTextPaint.descent(), this.mTextPaint);
            if (this.mTexturePaint == null) {
                this.mTexturePaint = new Paint();
                this.mTexturePaint.setAntiAlias(true);
                this.mTexturePaint.setFilterBitmap(true);
            }//from  ww w .j a va 2 s .  c o  m

        }
    }
}

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From source file:com.amitupadhyay.aboutexample.util.CollapsingTextHelper.java

private void ensureExpandedTexture() {
    if (mExpandedTitleTexture != null || mExpandedBounds.isEmpty() || TextUtils.isEmpty(mTextToDraw)) {
        return;/*from  w  w  w . j a  v a2s  .co m*/
    }
    mTextPaint.setTextSize(mExpandedTextSize);
    mTextPaint.setColor(mExpandedTextColor);
    mTextureAscent = mTextPaint.ascent();
    mTextureDescent = mTextPaint.descent();
    final int w = Math.round(mTextPaint.measureText(mTextToDraw, 0, mTextToDraw.length()));
    final int h = Math.round(mTextureDescent - mTextureAscent);
    if (w <= 0 && h <= 0) {
        return; // If the width or height are 0, return
    }
    mExpandedTitleTexture = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
    Canvas c = new Canvas(mExpandedTitleTexture);
    c.drawText(mTextToDraw, 0, mTextToDraw.length(), 0, h - mTextPaint.descent(), mTextPaint);
    if (mTexturePaint == null) {
        // Make sure we have a paint
        mTexturePaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG);
    }
}

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From source file:xyz.berial.textinputlayout.CollapsingTextHelper.java

private void ensureExpandedTexture() {
    if (mExpandedTitleTexture != null || mExpandedBounds.isEmpty() || TextUtils.isEmpty(mTextToDraw)) {
        return;/*from  w ww  .ja va2  s .co m*/
    }

    mTextPaint.setTextSize(mExpandedTextSize);
    mTextPaint.setColor(mExpandedTextColor);
    mTextureAscent = mTextPaint.ascent();
    mTextureDescent = mTextPaint.descent();

    final int w = Math.round(mTextPaint.measureText(mTextToDraw, 0, mTextToDraw.length()));
    final int h = Math.round(mTextureDescent - mTextureAscent);

    if (w <= 0 && h <= 0) {
        return; // If the width or height are 0, return
    }

    mExpandedTitleTexture = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);

    Canvas c = new Canvas(mExpandedTitleTexture);
    c.drawText(mTextToDraw, 0, mTextToDraw.length(), 0, h - mTextPaint.descent(), mTextPaint);

    if (mTexturePaint == null) {
        // Make sure we have a paint
        mTexturePaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG);
    }
}

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From source file:org.buffer.android.buffertextinputlayout.util.CollapsingTextHelper.java

private void ensureExpandedTexture() {
    if (mExpandedTitleTexture != null || mExpandedBounds.isEmpty() || TextUtils.isEmpty(mTextToDraw)) {
        return;//from   w w w  .  ja  v a 2  s . c o  m
    }
    calculateOffsets(0f);
    mTextureAscent = mTextPaint.ascent();
    mTextureDescent = mTextPaint.descent();
    final int w = Math.round(mTextPaint.measureText(mTextToDraw, 0, mTextToDraw.length()));
    final int h = Math.round(mTextureDescent - mTextureAscent);
    if (w <= 0 || h <= 0) {
        return; // If the width or height are 0, return
    }
    mExpandedTitleTexture = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
    Canvas c = new Canvas(mExpandedTitleTexture);
    c.drawText(mTextToDraw, 0, mTextToDraw.length(), 0, h - mTextPaint.descent(), mTextPaint);
    if (mTexturePaint == null) {
        // Make sure we have a paint
        mTexturePaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG);
    }
}

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From source file:com.tr4android.support.extension.widget.CollapsingTextHelper.java

private void ensureExpandedTexture() {
    if (mExpandedTitleTexture != null || mExpandedBounds.isEmpty() || TextUtils.isEmpty(mTextToDraw)) {
        return;//from w w w.  j  ava 2s  . c  o m
    }

    calculateOffsets(0f);
    mTextureAscent = mTextPaint.ascent();
    mTextureDescent = mTextPaint.descent();

    final int w = Math.round(mTextPaint.measureText(mTextToDraw, 0, mTextToDraw.length()));
    final int h = Math.round(mTextureDescent - mTextureAscent);

    if (w <= 0 && h <= 0) {
        return; // If the width or height are 0, return
    }

    mExpandedTitleTexture = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);

    Canvas c = new Canvas(mExpandedTitleTexture);
    c.drawText(mTextToDraw, 0, mTextToDraw.length(), 0, h - mTextPaint.descent(), mTextPaint);

    if (mTexturePaint == null) {
        // Make sure we have a paint
        mTexturePaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG);
    }
}

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From source file:android.support.design.widget.CollapsingTextHelper.java

private void ensureExpandedTexture() {
    if (mExpandedTitleTexture != null || mExpandedBounds.isEmpty() || TextUtils.isEmpty(mTextToDraw)) {
        return;//from   w  w w .  j a  v a2  s . c  o m
    }

    calculateOffsets(0f);
    mTextureAscent = mTextPaint.ascent();
    mTextureDescent = mTextPaint.descent();

    final int w = Math.round(mTextPaint.measureText(mTextToDraw, 0, mTextToDraw.length()));
    final int h = Math.round(mTextureDescent - mTextureAscent);

    if (w <= 0 || h <= 0) {
        return; // If the width or height are 0, return
    }

    mExpandedTitleTexture = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);

    Canvas c = new Canvas(mExpandedTitleTexture);
    c.drawText(mTextToDraw, 0, mTextToDraw.length(), 0, h - mTextPaint.descent(), mTextPaint);

    if (mTexturePaint == null) {
        // Make sure we have a paint
        mTexturePaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG);
    }
}

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From source file:com.android.mail.browse.ConversationItemView.java

private static void drawText(Canvas canvas, CharSequence s, int x, int y, TextPaint paint) {
    canvas.drawText(s, 0, s.length(), x, y, paint);
}

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