Java Code Examples for android.graphics.Paint#ascent()

/**
 * @since 6.0.3
 */
public void setTextIcon(final String pText) {
	final Paint background = new Paint();
	background.setColor(mTextLabelBackgroundColor);
	final Paint p = new Paint();
	p.setTextSize(mTextLabelFontSize);
	p.setColor(mTextLabelForegroundColor);
	p.setAntiAlias(true);
	p.setTypeface(Typeface.DEFAULT_BOLD);
	p.setTextAlign(Paint.Align.LEFT);
	final int width = (int) (p.measureText(pText) + 0.5f);
	final float baseline = (int) (-p.ascent() + 0.5f);
	final int height = (int) (baseline + p.descent() + 0.5f);
	final Bitmap image = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
	final Canvas c = new Canvas(image);
	c.drawPaint(background);
	c.drawText(pText, 0, baseline, p);
	mIcon = new BitmapDrawable(mResources, image);
	setAnchor(ANCHOR_CENTER, ANCHOR_CENTER);
}
 

/**
 * 绘制右侧索引条文本
 * 
 * @param canvas
 */
private void onDrawRightIndexText(Canvas canvas) {
	L.d(LOGTAG, "onDrawRightIndexText");
	// 绘画右侧索引条的字母
	Paint indexPaint = new Paint();
	indexPaint.setColor(Color.parseColor(COLOR_RIGHT_TEXT));
	// indexPaint.setAlpha((int) (255 * mAlphaRate));
	indexPaint.setAntiAlias(true);
	indexPaint.setTextSize(14 * mScaledDensity);

	float sectionHeight = (mIndexbarRect.height() - 2 * mIndexbarMargin)
			/ mSections.length;
	float paddingTop = (sectionHeight - (indexPaint.descent() - indexPaint
			.ascent())) / 2;
	for (int i = 0; i < mSections.length; i++) {
		float paddingLeft = (mIndexbarWidth - indexPaint
				.measureText(mSections[i])) / 2;
		canvas.drawText(mSections[i], mIndexbarRect.left + paddingLeft,
				mIndexbarRect.top + mIndexbarMargin + sectionHeight * i
						+ paddingTop - indexPaint.ascent(), indexPaint);
	}
}
 

private Bitmap getIconFromMinutes(Times t) {
    int left = new Period(LocalDateTime.now(), t.getTime(LocalDate.now(), t.getNextTime()), PeriodType.minutes()).getMinutes();
    Resources r = getContext().getResources();

    int size = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 24, r.getDisplayMetrics());
    Bitmap b = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
    Canvas c = new Canvas(b);
    Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
    paint.setColor(0xFFFFFFFF);
    paint.setTextAlign(Paint.Align.CENTER);
    paint.setTextSize(size);
    paint.setTextSize(size * size / paint.measureText((left < 10 ? left * 10 : left) + ""));
    float yPos = c.getHeight() / 2f - (paint.descent() + paint.ascent()) / 2;
    c.drawText(left + "", size / 2f, yPos, paint);
    return b;
}
 

private Bitmap getFontBitmap() {

		Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
		paint.setColor(iconColor);

		if (awesomeIconTypeFace != null && !isInEditMode()) {
			paint.setTypeface(awesomeIconTypeFace);
			paint.setTextSize(iconSize);
		} else {
			fontIcon = "o";
			paint.setTextSize(iconSize - 15);
		}

		paint.setTextAlign(Paint.Align.LEFT);
		float baseline = -paint.ascent(); // ascent() is negative
		int width = (int) (paint.measureText(fontIcon) + 0.5f); // round
		int height = (int) (baseline + paint.descent() + 0.5f);
		Bitmap image = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
		Canvas canvas = new Canvas(image);
		canvas.drawText(fontIcon, 0, baseline, paint);
		return image;
	}
 

private void drawLanguageOnSpacebar(final Key key, final Canvas canvas, final Paint paint) {
    final Keyboard keyboard = getKeyboard();
    if (keyboard == null) {
        return;
    }
    final int width = key.getWidth();
    final int height = key.getHeight();
    paint.setTextAlign(Align.CENTER);
    paint.setTypeface(Typeface.DEFAULT);
    paint.setTextSize(mLanguageOnSpacebarTextSize);
    final String language = layoutLanguageOnSpacebar(paint, keyboard.mId.mSubtype, width);
    // Draw language text with shadow
    final float descent = paint.descent();
    final float textHeight = -paint.ascent() + descent;
    final float baseline = height / 2 + textHeight / 2;
    paint.setColor(mLanguageOnSpacebarTextColor);
    paint.setAlpha(mLanguageOnSpacebarAnimAlpha);
    canvas.drawText(language, width / 2, baseline - descent, paint);
    paint.clearShadowLayer();
    paint.setTextScaleX(1.0f);
}
 

private Bitmap getIconFromMinutes(Times t) {
    int left = new Period(LocalDateTime.now(), t.getTime(LocalDate.now(), t.getNextTime()), PeriodType.minutes()).getMinutes();
    Resources r = getContext().getResources();

    int size = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 24, r.getDisplayMetrics());
    Bitmap b = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
    Canvas c = new Canvas(b);
    Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
    paint.setColor(0xFFFFFFFF);
    paint.setTextAlign(Paint.Align.CENTER);
    paint.setTextSize(size);
    paint.setTextSize(size * size / paint.measureText((left < 10 ? left * 10 : left) + ""));
    float yPos = c.getHeight() / 2f - (paint.descent() + paint.ascent()) / 2;
    c.drawText(left + "", size / 2f, yPos, paint);
    return b;
}
 

/**
 * Calculate the bounds for a view's title
 *
 * @param index
 * @param paint
 * @return
 */
private Rect calcBounds(int index, Paint paint) {
    //Calculate the text bounds
    Rect bounds = new Rect();
    CharSequence title = getTitle(index);
    bounds.right = (int) paint.measureText(title, 0, title.length());
    bounds.bottom = (int) (paint.descent() - paint.ascent());
    return bounds;
}
 

/**
 * Calculate the bounds for a view's title
 *
 * @param index
 * @param paint
 * @return
 */
private Rect calcBounds(int index, Paint paint) {
    //Calculate the text bounds
    Rect bounds = new Rect();
    CharSequence title = getTitle(index);
    bounds.right = (int) paint.measureText(title, 0, title.length());
    bounds.bottom = (int) (paint.descent() - paint.ascent());
    return bounds;
}
 

@Override
public void draw(Canvas canvas, RectF rectF, float x, float y,float strokeWidth,int progress) {
    Paint textPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    textPaint.setStrokeWidth(35);
    textPaint.setTextSize(textSize);
    textPaint.setColor(textColor);
    String progressStr = String.valueOf(progress);
    float textX = x-(textPaint.measureText(progressStr)/2);
    float textY = y-((textPaint.descent()+textPaint.ascent())/2);
    canvas.drawText(progressStr,textX,textY,textPaint);
}
 

/**
 * Calculate the bounds for a view's title
 *
 * @param index
 * @param paint
 * @return
 */
private Rect calcBounds(int index, Paint paint) {
    //Calculate the text bounds
    Rect bounds = new Rect();
    CharSequence title = getTitle(index);
    bounds.right = (int) paint.measureText(title, 0, title.length());
    bounds.bottom = (int) (paint.descent() - paint.ascent());
    return bounds;
}
 

/**
 * 绘制中间预览view
 * 
 * @param canvas
 */
private void onDrawMiddlePreview(Canvas canvas) {
	L.d(LOGTAG, "onDrawMiddlePreview");
	Paint previewPaint = new Paint(); // 用来绘画预览文本背景的画笔
	previewPaint.setColor(Color.parseColor(COLOR_MIDDLE_BACKGROUND));// 设置画笔颜色为黑色
	previewPaint.setAlpha(96); // 设置透明度
	previewPaint.setAntiAlias(true);// 设置抗锯齿
	previewPaint.setShadowLayer(3, 0, 0, Color.argb(64, 0, 0, 0)); // 设置阴影层

	Paint previewTextPaint = new Paint(); // 用来绘画预览字母的画笔
	previewTextPaint.setColor(Color.parseColor(COLOR_MIDDLE_TEXT)); // 设置画笔为白色
	previewTextPaint.setAntiAlias(true); // 设置抗锯齿
	previewTextPaint.setTextSize(60 * mScaledDensity); // 设置字体大小

	// 单个文本的宽度
	float previewTextWidth = previewTextPaint
			.measureText(mSections[mCurrentSection]);

	float previewSize = 2 * mPreviewPadding + previewTextPaint.descent()
			- previewTextPaint.ascent();

	RectF previewRect = new RectF((mListViewWidth - previewSize) / 2,
			(mListViewHeight - previewSize) / 2,
			(mListViewWidth - previewSize) / 2 + previewSize,
			(mListViewHeight - previewSize) / 2 + previewSize);

	// 中间索引的那个框
	canvas.drawRoundRect(previewRect, 5 * mDensity, 5 * mDensity,
			previewPaint);

	// 绘画索引字母
	canvas.drawText(mSections[mCurrentSection], previewRect.left
			+ (previewSize - previewTextWidth) / 2 - 1, previewRect.top
			+ mPreviewPadding - previewTextPaint.ascent() + 1,
			previewTextPaint);
}
 

/**
 * Calculate the bounds for a view's title
 *
 * @param index
 * @param paint
 * @return
 */
private Rect calcBounds(int index, Paint paint) {
    //Calculate the text bounds
    Rect bounds = new Rect();
    CharSequence title = getTitle(index);
    bounds.right = (int) paint.measureText(title, 0, title.length());
    bounds.bottom = (int) (paint.descent() - paint.ascent());
    return bounds;
}
 

/**
 * Calculate the bounds for a view's title
 *
 * @param index
 * @param paint
 * @return
 */
private Rect calcBounds(int index, Paint paint) {
    //Calculate the text bounds
    Rect bounds = new Rect();
    CharSequence title = getTitle(index);
    bounds.right = (int) paint.measureText(title, 0, title.length());
    bounds.bottom = (int) (paint.descent() - paint.ascent());
    return bounds;
}
 

/**
 * Calculate the bounds for a view's title
 *
 * @param index
 * @param paint
 * @return
 */
private Rect calcBounds(int index, Paint paint) {
    //Calculate the text bounds
    Rect bounds = new Rect();
    CharSequence title = getTitle(index);
    bounds.right = (int) paint.measureText(title, 0, title.length());
    bounds.bottom = (int) (paint.descent() - paint.ascent());
    return bounds;
}
 

private Bitmap writeTextOnDrawable(int drawableId, String text) 
{
	Bitmap bm = BitmapFactory.decodeResource(getResources(), drawableId).copy(Bitmap.Config.ARGB_8888, true);

	Typeface tf = Typeface.create("Helvetica", Typeface.BOLD);

	Paint paint = new Paint();
	paint.setStyle(Style.FILL);
	paint.setColor(Color.WHITE);
	paint.setTypeface(tf);
	paint.setTextAlign(Align.CENTER);
	paint.setTextSize(convertToPixels(getBaseContext(), 14));

	Rect textRect = new Rect();
	paint.getTextBounds(text, 0, text.length(), textRect);

	Canvas canvas = new Canvas(bm);

	//If the text is bigger than the canvas , reduce the font size
	if(textRect.width() >= (canvas.getWidth() - 4))     //the padding on either sides is considered as 4, so as to appropriately fit in the text
		paint.setTextSize(convertToPixels(getBaseContext(), 7));        //Scaling needs to be used for different dpi's

	//Calculate the positions
	int xPos = (canvas.getWidth() / 2) - 2;     //-2 is for regulating the x position offset

	//"- ((paint.descent() + paint.ascent()) / 2)" is the distance from the baseline to the center.
	int yPos = (int) ((canvas.getHeight() / 2) - ((paint.descent() + paint.ascent()) / 2) - 10) ;  

	canvas.drawText(text, xPos, yPos, paint);

	return  bm;
}
 

/**
 * Creates a rounded square of a certain color with
 * a character imprinted in white on it.
 *
 * @param character the character to write on the image.
 * @param width     the width of the final image.
 * @param height    the height of the final image.
 * @param color     the background color of the rounded square.
 * @return a valid bitmap of a rounded square with a character on it.
 */
@NonNull
public static Bitmap getRoundedLetterImage(@NonNull Character character, int width, int height, int color) {
    Bitmap image = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(image);
    Paint paint = new Paint();
    paint.setColor(color);
    Typeface boldText = Typeface.create(Typeface.SANS_SERIF, Typeface.BOLD);
    paint.setTypeface(boldText);
    paint.setTextSize(Utils.dpToPx(14));
    paint.setAntiAlias(true);
    paint.setTextAlign(Paint.Align.CENTER);
    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_OVER));

    int radius = Utils.dpToPx(2);

    RectF outer = new RectF(0, 0, canvas.getWidth(), canvas.getHeight());
    canvas.drawRoundRect(outer, radius, radius, paint);

    int xPos = (canvas.getWidth() / 2);
    int yPos = (int) ((canvas.getHeight() / 2) - ((paint.descent() + paint.ascent()) / 2));

    paint.setColor(Color.WHITE);
    canvas.drawText(character.toString(), xPos, yPos, paint);

    return image;
}
 

/**
 * Using the trigonometric Unit Circle, calculate the positions that the text will need to be
 * drawn at based on the specified circle radius. Place the values in the textGridHeights and
 * textGridWidths parameters.
 */
private static void calculatePositions(Paint paint, float radius, float xCenter, float yCenter,
        float textSize, float[] x, float[] y) {
    // Adjust yCenter to account for the text's baseline.
    paint.setTextSize(textSize);
    yCenter -= (paint.descent() + paint.ascent()) / 2;

    for (int i = 0; i < NUM_POSITIONS; i++) {
        x[i] = xCenter - radius * COS_30[i];
        y[i] = yCenter - radius * SIN_30[i];
    }
}
 

public static void updateEntityWidget(Context context, Widget widget) {
    Log.d("YouQi", "Widget updateEntityWidget: " + CommonUtil.deflate(widget));
    AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);

    String iconText = widget.getMdiIcon(); //MDIFont.getIcon("mdi:weather-hail");
    int iconColor = ResourcesCompat.getColor(context.getResources(), (widget.isToggleable() && !widget.isCurrentStateActive()) ? R.color.md_grey_500 : R.color.xiaomiPrimaryTextSelected, null);

    Bitmap myBitmap = Bitmap.createBitmap(160, 160, Bitmap.Config.ARGB_8888);
    myBitmap.eraseColor(Color.TRANSPARENT);

    Typeface typeface = ResourcesCompat.getFont(context, R.font.mdi);
    Paint paint = new Paint();
    paint.setFlags(Paint.ANTI_ALIAS_FLAG);
    paint.setAntiAlias(true);
    paint.setTypeface(typeface);
    paint.setColor(iconColor);
    paint.setTextSize(160);
    //paint.setStrokeWidth(24); // Text Size
    //setTextSizeForWidth(paint, 48, iconText);
    //paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_OVER)); // Text Overlapping Pattern

    Canvas canvas = new Canvas(myBitmap);
    int yPos = (int) ((canvas.getHeight() / 2) - ((paint.descent() + paint.ascent()) / 2));
    int xPos = (canvas.getWidth() - yPos) / 2;//(canvas.getWidth() / 2);
    canvas.drawText(iconText, 0, yPos, paint);

    RemoteViews remoteViews = new RemoteViews("com.axzae.homeassistant", R.layout.widget_entity);
    remoteViews.setImageViewBitmap(R.id.image_icon, myBitmap);
    remoteViews.setTextViewText(R.id.text_state, widget.getFriendlyStateRow());
    remoteViews.setTextColor(R.id.text_state, iconColor);
    remoteViews.setTextViewText(R.id.text_group, widget.getFriendlyName());

    //https://stackoverflow.com/questions/21311917/onreceive-will-always-receive-the-last-appwidgetid-even-different-instance-widg
    Intent newIntent = new Intent(context, EntityWidgetProvider.class);
    newIntent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
    newIntent.putExtra("appWidgetId", widget.appWidgetId);
    newIntent.putExtra("widget", CommonUtil.deflate(widget));
    PendingIntent pendingIntent = PendingIntent.getBroadcast(context, widget.appWidgetId, newIntent, PendingIntent.FLAG_UPDATE_CURRENT);
    remoteViews.setOnClickPendingIntent(R.id.item, pendingIntent);
    appWidgetManager.updateAppWidget(widget.appWidgetId, remoteViews);
    Log.d("YouQi", "appWidgetManager updating (" + widget.appWidgetId + "): " + widget.getFriendlyState());
}
 

private void drawTextCentered(String text, float x, float y, Paint paint, Canvas canvas) {
    float xPos = x - (paint.measureText(text) / 2);
    float yPos = (y - ((paint.descent() + paint.ascent()) / 2));

    canvas.drawText(text, xPos, yPos, paint);
}
 

@NonNull
public static Bitmap getRoundedNumberImage(int number, int width, int height, int color, int thickness) {
    String text;

    if (number > 99) {
        text = "\u221E";
    } else {
        text = String.valueOf(number);
    }

    Bitmap image = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(image);
    Paint paint = new Paint();
    paint.setColor(color);
    Typeface boldText = Typeface.create(Typeface.SANS_SERIF, Typeface.BOLD);
    paint.setTypeface(boldText);
    paint.setTextSize(Utils.dpToPx(14));
    paint.setAntiAlias(true);
    paint.setTextAlign(Paint.Align.CENTER);
    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_OVER));

    int radius = Utils.dpToPx(2);

    RectF outer = new RectF(0, 0, canvas.getWidth(), canvas.getHeight());
    canvas.drawRoundRect(outer, radius, radius, paint);

    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));

    radius--;
    RectF inner = new RectF(thickness, thickness, canvas.getWidth() - thickness, canvas.getHeight() - thickness);
    canvas.drawRoundRect(inner, radius, radius, paint);

    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_OVER));

    int xPos = (canvas.getWidth() / 2);
    int yPos = (int) ((canvas.getHeight() / 2) - ((paint.descent() + paint.ascent()) / 2));

    canvas.drawText(String.valueOf(text), xPos, yPos, paint);

    return image;
}