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:com.chibatching.imgindicatortab.ImgIndicatorTab.java

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

    if (mViewPager == null) {
        return;/*w w w  .  j ava 2s  .c om*/
    }

    int tabCount = mViewPager.getAdapter().getCount();
    if (tabCount == 0) {
        return;
    }

    if (mCurrentPage >= tabCount) {
        setCurrentItem(tabCount - 1);
    }

    float tabWidth = (float) (getWidth() - getPaddingLeft() - getPaddingRight()) / tabCount;
    float centerY = getPaddingTop() + (float) (getHeight() - getPaddingTop() - getPaddingBottom()) / 2;

    for (int i = 0; i < tabCount; i++) {
        float tabCenterX = (tabWidth * i) + getPaddingLeft() + tabWidth / 2;
        CharSequence text = mViewPager.getAdapter().getPageTitle(i);

        Paint textPaint;
        if (mTextCurrentPage == i) {
            textPaint = mSelectedTextPaint;
        } else {
            textPaint = mDeselectedTextPaint;
        }

        Paint.FontMetrics metrics = textPaint.getFontMetrics();
        float textWidth = textPaint.measureText(text, 0, text.length());
        float textX = tabCenterX - textWidth / 2;
        float textY = centerY - (metrics.ascent + metrics.descent) / 2;

        canvas.drawText(text, 0, text.length(), textX, textY, textPaint);
    }

    if (mIndicator == null) {
        return;
    }

    Bitmap indicatorBitmap = ((BitmapDrawable) mIndicator).getBitmap();
    int bitmapWidth = indicatorBitmap.getWidth();
    int bitmapHeight = indicatorBitmap.getHeight();

    float scale = 1f;
    if (mFitIndicator || bitmapWidth > tabWidth) {
        scale = tabWidth / bitmapWidth;
    }
    if (bitmapHeight * scale > getHeight()) {
        scale = getHeight() / bitmapHeight;
    }

    float tabCenterX = tabWidth * (mCurrentPage + mPositionOffset) + getPaddingLeft() + tabWidth / 2;
    float bitmapX = tabCenterX - (bitmapWidth * scale) / 2;
    float bitmapY = getHeight() - bitmapHeight * scale;

    // Set matrix for bitmap
    mMatrix.reset();
    mMatrix.postScale(scale, scale);
    mMatrix.postTranslate(bitmapX, bitmapY);

    canvas.drawBitmap(indicatorBitmap, mMatrix, mIndicatorPaint);
}

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From source file:com.halloon.android.util.UnderLinePageIndicator.java

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

    if (mViewPager == null) {
        return;//from   www .j a  va  2 s .c o m
    }
    final int count = mViewPager.getAdapter().getCount();
    if (count == 0) {
        return;
    }

    if (mCurrentPage >= count) {
        setCurrentItem(count - 1);
        return;
    }

    final int paddingLeft = getPaddingLeft();
    final float pageWidth = (getWidth() - paddingLeft - getPaddingRight()) / (1f * count);
    final float exScale = pageWidth * scale;
    final float left = paddingLeft + pageWidth * (mCurrentPage + mPositionOffset) + exScale;
    final float right = left + pageWidth - (exScale * 2);
    final float bottom = getHeight() - getPaddingBottom();
    final float exTop = bottom - lineHeight;
    canvas.drawRect(left, exTop, right, bottom, mPaint);

    mPaintText.setColor(0xFFFFFFFF);
    mPaintText.setTextSize((float) (getHeight() / 2.4F));
    for (int i = 0; i < count; i++) {
        String til = (String) getTitle(i);
        mPaintText.getTextBounds(til, 0, til.length(), bounds);
        canvas.drawText(til, 0, til.length(),
                paddingLeft + (pageWidth * i) + ((pageWidth - bounds.width()) / 2),
                exTop / 2 + (bounds.height() / 2), mPaintText);
    }
}

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From source file:com.alimuzaffar.lib.pin.PinEntryEditText.java

@Override
protected void onDraw(Canvas canvas) {
    //super.onDraw(canvas);
    CharSequence text = getFullText();
    int textLength = text.length();
    float[] textWidths = new float[textLength];
    getPaint().getTextWidths(text, 0, textLength, textWidths);

    float hintWidth = 0;
    if (mSingleCharHint != null) {
        float[] hintWidths = new float[mSingleCharHint.length()];
        getPaint().getTextWidths(mSingleCharHint, hintWidths);
        for (float i : hintWidths) {
            hintWidth += i;/*  w  w  w.  j a  va2 s . co m*/
        }
    }
    for (int i = 0; i < mNumChars; i++) {
        //If a background for the pin characters is specified, it should be behind the characters.
        if (mPinBackground != null) {
            updateDrawableState(i < textLength, i == textLength);
            mPinBackground.setBounds((int) mLineCoords[i].left, (int) mLineCoords[i].top,
                    (int) mLineCoords[i].right, (int) mLineCoords[i].bottom);
            mPinBackground.draw(canvas);
        }
        float middle = mLineCoords[i].left + mCharSize / 2;
        if (textLength > i) {
            if (!mAnimate || i != textLength - 1) {
                canvas.drawText(text, i, i + 1, middle - textWidths[i] / 2, mCharBottom[i], mCharPaint);
            } else {
                canvas.drawText(text, i, i + 1, middle - textWidths[i] / 2, mCharBottom[i], mLastCharPaint);
            }
        } else if (mSingleCharHint != null) {
            canvas.drawText(mSingleCharHint, middle - hintWidth / 2, mCharBottom[i], mSingleCharPaint);
        }
        //The lines should be in front of the text (because that's how I want it).
        if (mPinBackground == null) {
            updateColorForLines(i <= textLength);
            canvas.drawLine(mLineCoords[i].left, mLineCoords[i].top, mLineCoords[i].right,
                    mLineCoords[i].bottom, mLinesPaint);
        }
    }
}

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

public void draw(Canvas canvas) {
    final int saveCount = canvas.save();
    if (mTextToDraw != null && mDrawTitle) {
        float x = mCurrentDrawX;
        float y = mCurrentDrawY;
        final boolean drawTexture = mUseTexture && mExpandedTitleTexture != null;
        final float ascent;
        final float descent;
        if (drawTexture) {
            ascent = mTextureAscent * mScale;
            descent = mTextureDescent * mScale;
        } else {//from  w w w . j a va  2 s. co m
            ascent = mTextPaint.ascent() * mScale;
            descent = mTextPaint.descent() * mScale;
        }
        if (DEBUG_DRAW) {
            // Just a debug tool, which drawn a magenta rect in the text bounds
            canvas.drawRect(mCurrentBounds.left, y + ascent, mCurrentBounds.right, y + descent,
                    DEBUG_DRAW_PAINT);
        }
        if (drawTexture) {
            y += ascent;
        }
        if (mScale != 1f) {
            canvas.scale(mScale, mScale, x, y);
        }
        if (drawTexture) {
            // If we should use a texture, draw it instead of text
            canvas.drawBitmap(mExpandedTitleTexture, x, y, mTexturePaint);
        } else {
            canvas.drawText(mTextToDraw, 0, mTextToDraw.length(), x, y, mTextPaint);
        }
    }
    canvas.restoreToCount(saveCount);
}

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

public void draw(Canvas canvas) {
    final int saveCount = canvas.save();

    if (mTextToDraw != null && mDrawTitle) {
        float x = mCurrentDrawX;
        float y = mCurrentDrawY;

        final boolean drawTexture = mUseTexture && mExpandedTitleTexture != null;

        final float ascent;
        final float descent;
        if (drawTexture) {
            ascent = mTextureAscent * mScale;
            descent = mTextureDescent * mScale;
        } else {//from ww w  .j a va  2  s  .com
            ascent = mTextPaint.ascent() * mScale;
            descent = mTextPaint.descent() * mScale;
        }

        if (DEBUG_DRAW) {
            // Just a debug tool, which drawn a Magneta rect in the text bounds
            canvas.drawRect(mCurrentBounds.left, y + ascent, mCurrentBounds.right, y + descent,
                    DEBUG_DRAW_PAINT);
        }

        if (drawTexture) {
            y += ascent;
        }

        if (mScale != 1f) {
            canvas.scale(mScale, mScale, x, y);
        }

        if (drawTexture) {
            // If we should use a texture, draw it instead of text
            canvas.drawBitmap(mExpandedTitleTexture, x, y, mTexturePaint);
        } else {
            canvas.drawText(mTextToDraw, 0, mTextToDraw.length(), x, y, mTextPaint);
        }
    }

    canvas.restoreToCount(saveCount);
}

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

public void draw(Canvas canvas) {
    final int saveCount = canvas.save();
    if (mTextToDraw != null && mDrawTitle) {
        float x = mCurrentDrawX;
        float y = mCurrentDrawY;
        final boolean drawTexture = mUseTexture && mExpandedTitleTexture != null;
        final float ascent;
        final float descent;
        // Update the TextPaint to the current text size
        mTextPaint.setTextSize(mCurrentTextSize);
        if (drawTexture) {
            ascent = mTextureAscent * mScale;
            descent = mTextureDescent * mScale;
        } else {//from w w  w.  j  a  v  a 2 s  . c om
            ascent = mTextPaint.ascent() * mScale;
            descent = mTextPaint.descent() * mScale;
        }
        if (DEBUG_DRAW) {
            // Just a debug tool, which drawn a Magneta rect in the text bounds
            canvas.drawRect(mCurrentBounds.left, y + ascent, mCurrentBounds.right, y + descent,
                    DEBUG_DRAW_PAINT);
        }
        if (drawTexture) {
            y += ascent;
        }
        if (mScale != 1f) {
            canvas.scale(mScale, mScale, x, y);
        }
        if (drawTexture) {
            // If we should use a texture, draw it instead of text
            canvas.drawBitmap(mExpandedTitleTexture, x, y, mTexturePaint);
        } else {
            canvas.drawText(mTextToDraw, 0, mTextToDraw.length(), x, y, mTextPaint);
        }
    }
    canvas.restoreToCount(saveCount);
}

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

public void draw(Canvas canvas) {
    final int saveCount = canvas.save();

    if (mTextToDraw != null && mDrawTitle) {
        float x = mCurrentDrawX;
        float y = mCurrentDrawY;

        final boolean drawTexture = mUseTexture && mExpandedTitleTexture != null;

        final float ascent;
        final float descent;
        if (drawTexture) {
            ascent = mTextureAscent * mScale;
            descent = mTextureDescent * mScale;
        } else {/*w  w  w  .  ja  v  a2  s . c o m*/
            ascent = mTextPaint.ascent() * mScale;
            descent = mTextPaint.descent() * mScale;
        }

        if (DEBUG_DRAW) {
            // Just a debug tool, which drawn a magenta rect in the text bounds
            canvas.drawRect(mCurrentBounds.left, y + ascent, mCurrentBounds.right, y + descent,
                    DEBUG_DRAW_PAINT);
        }

        if (drawTexture) {
            y += ascent;
        }

        if (mScale != 1f) {
            canvas.scale(mScale, mScale, x, y);
        }

        if (drawTexture) {
            // If we should use a texture, draw it instead of text
            canvas.drawBitmap(mExpandedTitleTexture, x, y, mTexturePaint);
        } else {
            canvas.drawText(mTextToDraw, 0, mTextToDraw.length(), x, y, mTextPaint);
        }
    }

    canvas.restoreToCount(saveCount);
}

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From source file:com.android.contacts.common.list.ShortcutIntentBuilder.java

/**
 * Generates a phone number shortcut icon. Adds an overlay describing the type of the phone
 * number, and if there is a photo also adds the call action icon.
 *///from   w  w w .j  a  v  a2 s  . c om
private Bitmap generatePhoneNumberIcon(Drawable photo, int phoneType, String phoneLabel, int actionResId) {
    final Resources r = mContext.getResources();
    final float density = r.getDisplayMetrics().density;

    Bitmap phoneIcon = ((BitmapDrawable) r.getDrawableForDensity(actionResId, mIconDensity)).getBitmap();

    Bitmap icon = generateQuickContactIcon(photo);
    Canvas canvas = new Canvas(icon);

    // Copy in the photo
    Paint photoPaint = new Paint();
    photoPaint.setDither(true);
    photoPaint.setFilterBitmap(true);
    Rect dst = new Rect(0, 0, mIconSize, mIconSize);

    // Create an overlay for the phone number type
    CharSequence overlay = Phone.getTypeLabel(r, phoneType, phoneLabel);

    if (overlay != null) {
        TextPaint textPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG);
        textPaint.setTextSize(r.getDimension(R.dimen.shortcut_overlay_text_size));
        textPaint.setColor(r.getColor(R.color.textColorIconOverlay));
        textPaint.setShadowLayer(4f, 0, 2f, r.getColor(R.color.textColorIconOverlayShadow));

        final FontMetricsInt fmi = textPaint.getFontMetricsInt();

        // First fill in a darker background around the text to be drawn
        final Paint workPaint = new Paint();
        workPaint.setColor(mOverlayTextBackgroundColor);
        workPaint.setStyle(Paint.Style.FILL);
        final int textPadding = r.getDimensionPixelOffset(R.dimen.shortcut_overlay_text_background_padding);
        final int textBandHeight = (fmi.descent - fmi.ascent) + textPadding * 2;
        dst.set(0, mIconSize - textBandHeight, mIconSize, mIconSize);
        canvas.drawRect(dst, workPaint);

        overlay = TextUtils.ellipsize(overlay, textPaint, mIconSize, TruncateAt.END);
        final float textWidth = textPaint.measureText(overlay, 0, overlay.length());
        canvas.drawText(overlay, 0, overlay.length(), (mIconSize - textWidth) / 2,
                mIconSize - fmi.descent - textPadding, textPaint);
    }

    // Draw the phone action icon as an overlay
    Rect src = new Rect(0, 0, phoneIcon.getWidth(), phoneIcon.getHeight());
    int iconWidth = icon.getWidth();
    dst.set(iconWidth - ((int) (20 * density)), -1, iconWidth, ((int) (19 * density)));
    canvas.drawBitmap(phoneIcon, src, dst, photoPaint);

    canvas.setBitmap(null);

    return icon;
}

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From source file:org.connectbot.TerminalView.java

@Override
public void onDraw(Canvas canvas) {
    if (bridge.bitmap != null) {
        // draw the bitmap
        bridge.onDraw();//from   w w w .  j  a v  a 2s  . c  o  m

        // draw the bridge bitmap if it exists
        canvas.drawBitmap(bridge.bitmap, 0, 0, paint);

        // also draw cursor if visible
        if (bridge.buffer.isCursorVisible()) {
            int cursorColumn = bridge.buffer.getCursorColumn();
            final int cursorRow = bridge.buffer.getCursorRow();

            final int columns = bridge.buffer.getColumns();

            if (cursorColumn == columns)
                cursorColumn = columns - 1;

            if (cursorColumn < 0 || cursorRow < 0)
                return;

            int currentAttribute = bridge.buffer.getAttributes(cursorColumn, cursorRow);
            boolean onWideCharacter = (currentAttribute & VDUBuffer.FULLWIDTH) != 0;

            int x = cursorColumn * bridge.charWidth;
            int y = (bridge.buffer.getCursorRow() + bridge.buffer.screenBase - bridge.buffer.windowBase)
                    * bridge.charHeight;

            // Save the current clip and translation
            canvas.save();

            canvas.translate(x, y);
            canvas.clipRect(0, 0, bridge.charWidth * (onWideCharacter ? 2 : 1), bridge.charHeight);
            canvas.drawPaint(cursorPaint);

            final int deadKey = bridge.getKeyHandler().getDeadKey();
            if (deadKey != 0) {
                canvas.drawText(new char[] { (char) deadKey }, 0, 1, 0, 0, cursorStrokePaint);
            }

            // Make sure we scale our decorations to the correct size.
            canvas.concat(scaleMatrix);

            int metaState = bridge.getKeyHandler().getMetaState();

            if ((metaState & TerminalKeyListener.OUR_SHIFT_ON) != 0)
                canvas.drawPath(shiftCursor, cursorStrokePaint);
            else if ((metaState & TerminalKeyListener.OUR_SHIFT_LOCK) != 0)
                canvas.drawPath(shiftCursor, cursorPaint);

            if ((metaState & TerminalKeyListener.OUR_ALT_ON) != 0)
                canvas.drawPath(altCursor, cursorStrokePaint);
            else if ((metaState & TerminalKeyListener.OUR_ALT_LOCK) != 0)
                canvas.drawPath(altCursor, cursorPaint);

            if ((metaState & TerminalKeyListener.OUR_CTRL_ON) != 0)
                canvas.drawPath(ctrlCursor, cursorStrokePaint);
            else if ((metaState & TerminalKeyListener.OUR_CTRL_LOCK) != 0)
                canvas.drawPath(ctrlCursor, cursorPaint);

            // Restore previous clip region
            canvas.restore();
        }

        // draw any highlighted area
        if (bridge.isSelectingForCopy()) {
            SelectionArea area = bridge.getSelectionArea();
            canvas.save(Canvas.CLIP_SAVE_FLAG);
            canvas.clipRect(area.getLeft() * bridge.charWidth, area.getTop() * bridge.charHeight,
                    (area.getRight() + 1) * bridge.charWidth, (area.getBottom() + 1) * bridge.charHeight);
            canvas.drawPaint(cursorPaint);
            canvas.restore();
        }
    }
}

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From source file:com.silentcircle.contacts.list.ShortcutIntentBuilder.java

/**
 * Generates a phone number shortcut icon. Adds an overlay describing the type of the phone
 * number, and if there is a photo also adds the call action icon.
 *//* w w w.  j  a va 2  s .c  om*/
private Bitmap generatePhoneNumberIcon(Drawable photo, int phoneType, String phoneLabel, int actionResId) {
    final Resources r = mContext.getResources();
    final float density = r.getDisplayMetrics().density;

    Bitmap phoneIcon = ((BitmapDrawable) r.getDrawableForDensity(actionResId, mIconDensity)).getBitmap();

    Bitmap icon = generateQuickContactIcon(photo);
    Canvas canvas = new Canvas(icon);

    // Copy in the photo
    Paint photoPaint = new Paint();
    photoPaint.setDither(true);
    photoPaint.setFilterBitmap(true);
    Rect dst = new Rect(0, 0, mIconSize, mIconSize);

    // Create an overlay for the phone number type
    CharSequence overlay = Phone.getTypeLabel(r, phoneType, phoneLabel);

    if (overlay != null) {
        TextPaint textPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG);
        textPaint.setTextSize(r.getDimension(R.dimen.shortcut_overlay_text_size));
        textPaint.setColor(ContextCompat.getColor(mContext, R.color.textColorIconOverlay));
        textPaint.setShadowLayer(4f, 0, 2f,
                ContextCompat.getColor(mContext, R.color.textColorIconOverlayShadow));

        final FontMetricsInt fmi = textPaint.getFontMetricsInt();

        // First fill in a darker background around the text to be drawn
        final Paint workPaint = new Paint();
        workPaint.setColor(mOverlayTextBackgroundColor);
        workPaint.setStyle(Paint.Style.FILL);
        final int textPadding = r.getDimensionPixelOffset(R.dimen.shortcut_overlay_text_background_padding);
        final int textBandHeight = (fmi.descent - fmi.ascent) + textPadding * 2;
        dst.set(0, mIconSize - textBandHeight, mIconSize, mIconSize);
        canvas.drawRect(dst, workPaint);

        overlay = TextUtils.ellipsize(overlay, textPaint, mIconSize, TruncateAt.END);
        final float textWidth = textPaint.measureText(overlay, 0, overlay.length());
        canvas.drawText(overlay, 0, overlay.length(), (mIconSize - textWidth) / 2,
                mIconSize - fmi.descent - textPadding, textPaint);
    }

    // Draw the phone action icon as an overlay
    Rect src = new Rect(0, 0, phoneIcon.getWidth(), phoneIcon.getHeight());
    int iconWidth = icon.getWidth();
    dst.set(iconWidth - ((int) (20 * density)), -1, iconWidth, ((int) (19 * density)));
    canvas.drawBitmap(phoneIcon, src, dst, photoPaint);

    canvas.setBitmap(null);

    return icon;
}

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