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本文部分圖文摘錄自這篇文章

自定義View的時(shí)候有時(shí)要在View里面繪制文字，就會(huì)調(diào)用Canvas的drawText系列方法，其中值得注意的就是drawText方法中的x和y這兩個(gè)參數(shù)。按照Android的習(xí)慣，一般都會(huì)認(rèn)為點(diǎn)(x,y)代表著文字所在的矩形的左上角的點(diǎn)，但實(shí)際上并不是！先來看看官方文檔的解釋：

@param x The x-coordinate of the origin of the text being drawn.The origin is interpreted based on the Align setting in the paint
@param y The y-coordinate of the baseline of the text being drawn

也就是說：
參數(shù)x代表文字開始被繪制的源點(diǎn)的橫坐標(biāo)，而文字從這個(gè)源點(diǎn)開始會(huì)如何被繪制則由Paint.Align這個(gè)枚舉類型來決定（文章后面有效果圖）。
Paint.Align有三個(gè)取值：
Paint.Align.LEFT 從源點(diǎn)開始向右繪制文字，即源點(diǎn)在整串文字的最左邊；
Paint.Align.CENTER 從源點(diǎn)開始向左右兩邊繪制文字，即源點(diǎn)在整串文字的中間；
Paint.Align.RIGHT 從源點(diǎn)開始向左繪制文字，即源點(diǎn)在整串文字的最右邊。
參數(shù)y代表文字的baseline的縱坐標(biāo)，關(guān)于baseline的含義看下圖：

除了基線以外，如上圖所示，另外還有四條線，分別是ascent,descent,top,bottom，他們的意義分別是：

ascent: 系統(tǒng)建議的，繪制單個(gè)字符時(shí)，字符應(yīng)當(dāng)?shù)淖罡吒叨人诰€
descent:系統(tǒng)建議的，繪制單個(gè)字符時(shí)，字符應(yīng)當(dāng)?shù)淖畹透叨人诰€
top: 可繪制的最高高度所在線
bottom: 可繪制的最低高度所在線

一般來說，文字都會(huì)落在ascent和descent這兩條線之間，這也是系統(tǒng)建議的。一些特殊字符例外，但也不會(huì)超出top和bottom這兩條線。由這幾條線的值（可以由textPaint.getFontMetrics().bottom這樣的方式得到，下面會(huì)提到）就可以比較精準(zhǔn)的計(jì)算出文字區(qū)域的高度了。
所以，當(dāng)文字的size和typeface（這個(gè)一般不用管，默認(rèn)就行了）和繪制源點(diǎn)(x, y)都決定了之后，文字的位置也就決定了。
一般在繪制文字的時(shí)候，需求都是“在某個(gè)地方的中間繪制一串文字”，更通用的情況就是給定一個(gè)已知的點(diǎn)(originX, originY)，將這個(gè)點(diǎn)作為將要繪制的字符串所在的矩形的四個(gè)頂點(diǎn)或中心繪制文字，這時(shí)就需要對文字的寬高進(jìn)行測量。

網(wǎng)上搜集了一下測量文字的寬高主要有以下方法
測量文字寬度

private void measureTextWidth() {
        TextPaint textPaint = new TextPaint();
        textPaint.setTextSize(10);
        String str = "，";

        //方法一：利用textPaint的getTextBounds方法，可以得到文字所在的最小矩形的寬高
        Rect rect = new Rect();
        textPaint.getTextBounds(str, 0, str.length(), rect);
        Log.i("tag", "text's width by getTextBounds is: " + rect.width());

        //方法二：利用textPaint的measureText方法
        Log.i("tag", "text's width by measureText is: " + textPaint.measureText(str));

        //方法三：利用textPaint的getTextWidths方法，逐個(gè)計(jì)算出文字的寬，然后求和
        float[] widths = new float[str.length()];
        textPaint.getTextWidths(str, widths);
        float totalWidth = 0;
        for (float width : widths) {
            totalWidth += width;
        }
        Log.i("tag", "text's width by getTextWidths is: " + totalWidth);

    }

基本上方法二和方法三輸出的結(jié)果是一樣的，方法一的結(jié)果則不會(huì)大于方法二和方法三的結(jié)果。

測量文字的高度

private void measureTextHeight() {
        TextPaint textPaint = new TextPaint();
        textPaint.setTextSize(10);
        String str = "，";

        //方法一：利用textPaint的getTextBounds方法，可以得到文字所在的最小矩形的寬高
        Rect rect = new Rect();
        textPaint.getTextBounds(str, 0, str.length(), rect);
        Log.i("tag", "text's height by getTextBounds is: " + rect.height());

        //方法二：利用Paint.FontMetrics。
        Paint.FontMetrics fontMetrics = textPaint.getFontMetrics();
        Log.i("tag", "text's height by getFontMetrics is: " + (fontMetrics.descent - fontMetrics.ascent));
        Log.i("tag", "text's height by getFontMetrics is: " + (fontMetrics.bottom - fontMetrics.top));
    }

以上方法中提到的文字所在的最小矩形就是下圖的紅色區(qū)域，綠色區(qū)域就是由top、bottom和x(Align.LEFT)以及textPaint.measureText(str)畫出來的：

所以我一般是使用方法一來測量文字的寬高，畢竟是我們眼睛能看到的區(qū)域。

有了文字的寬高和已知的定點(diǎn)(x,y)就能比較準(zhǔn)確的在想要的位置繪制文字了。來試一下以指定點(diǎn)(x,y)為中心繪制文字，代碼如下：

public class DrawTextView extends View{

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

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

    public DrawTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private TextPaint textPaint;
    private String text = "g";
    private Rect minRect;
    private int textWidth;
    private int textHeight;

    private Paint rectPaint;
    private RectF rectF;

    private Paint pointPaint;
    private void init() {
        textPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
        textPaint.setTextSize(200);
        textPaint.setTypeface(Typeface.DEFAULT);
        textPaint.setColor(Color.RED);
        minRect = new Rect();
        textPaint.getTextBounds(text, 0, text.length(), minRect);
        textWidth = minRect.width();
        textHeight = minRect.height();

        pointPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        pointPaint.setStrokeWidth(10);
        pointPaint.setColor(Color.BLACK);

        rectPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        rectPaint.setStyle(Paint.Style.FILL);
        rectPaint.setColor(Color.GREEN);
        rectF = new RectF();
    }

    private int originX;
    private int originY;
    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        originX = getMeasuredWidth() / 2;
        originY = getMeasuredHeight() / 2;


        /**
         *      _ _ _ _ _
         *     |         |
         *     |  (x,y)  |
         *     |----·    |height
         *     |    |    |
         *     |    |    |
         *     ·- - · - -·
         *        width
         *
         *  以指定點(diǎn)(x,y)為中心繪制文字，方框?yàn)榇L制文字所在的最小矩形，則矩形的各頂點(diǎn)均可以通過簡單的邏輯換算得到。
         *  下面分別以Paint.Align.LEFT，Paint.Align.RIGHT和Paint.Align.CENTER三種方式繪制文字，
         *  其繪制源點(diǎn)分別為矩形底邊的左右中三點(diǎn)
         */

        //Paint.Align.LEFT
        textPaint.setTextAlign(Paint.Align.LEFT);
        originY = 200;
        rectF.set(originX - textWidth / 2, originY - textHeight / 2, originX + textWidth / 2, originY + textHeight / 2);
        canvas.drawRect(rectF, rectPaint);
        canvas.drawText(text, originX - textWidth / 2, originY + textHeight / 2,  textPaint);
        canvas.drawPoint(originX, originY, pointPaint);

        //Paint.Align.RIGHT
        textPaint.setTextAlign(Paint.Align.RIGHT);
        originY = 500;
        rectF.set(originX - textWidth / 2, originY - textHeight / 2, originX + textWidth / 2, originY + textHeight / 2);
        canvas.drawRect(rectF, rectPaint);
        canvas.drawText(text, originX + textWidth / 2, originY + textHeight / 2,  textPaint);
        canvas.drawPoint(originX, originY, pointPaint);

        //Paint.Align.CENTER
        textPaint.setTextAlign(Paint.Align.CENTER);
        originY = 800;
        rectF.set(originX - textWidth / 2, originY - textHeight / 2, originX + textWidth / 2, originY + textHeight / 2);
        canvas.drawRect(rectF, rectPaint);
        canvas.drawText(text, originX, originY + textHeight / 2,  textPaint);
        canvas.drawPoint(originX, originY, pointPaint);

    }
}

運(yùn)行效果如下：

發(fā)現(xiàn)繪制的字母“g”在Align.LEFT時(shí)偏右了；而在Align.RIGHT時(shí)偏左了；只有Align.CENTER時(shí)是正常的，雖然“g”并沒有完全落到綠色的最小矩形里面，但是因?yàn)榫匦蔚牡走吺撬腷aseline所以這樣顯示是正常的，下圖有助于理解這一說法。

那為什么在Align.LEFT和Align.RIGHT時(shí)繪制文字會(huì)出現(xiàn)了一點(diǎn)偏移呢？原因我不太清楚，但是在查找原因的過程中我無意的將利用textPaint獲得的文字所在的最小矩形minRect的位置信息的值打印了出來：

Log.i("tag",minRect.left + "");
Log.i("tag",minRect.top + "");
Log.i("tag",minRect.right + "");
Log.i("tag",minRect.bottom + "");

輸出為：

11-09 22:08:17.047 22634-22634/com.eichinn.androidheroes I/tag: 9
11-09 22:08:17.047 22634-22634/com.eichinn.androidheroes I/tag: -108
11-09 22:08:17.047 22634-22634/com.eichinn.androidheroes I/tag: 99
11-09 22:08:17.047 22634-22634/com.eichinn.androidheroes I/tag: 42

這些數(shù)字很奇怪，如果將這個(gè)矩形在屏幕上畫出來的話，會(huì)發(fā)現(xiàn)這個(gè)矩形的左下角非常接近(0,0)，而且如果以(0,0)為源點(diǎn)繪制文字的話，則文字會(huì)完全落入到這個(gè)最小矩形里面。而textPaint的getTextBounds方法說明貌似也證實(shí)了這一點(diǎn)：

Return in bounds (allocated by the caller) the smallest rectangle that encloses all of the characters, with an implied origin at (0,0).

畫出來看看：

public class DrawTextView extends View{

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

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

    public DrawTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private TextPaint textPaint;
    private String text = "g";
    private Rect minRect;
    private int textWidth;
    private int textHeight;

    private Paint rectPaint;
    private RectF rectF;

    private Paint pointPaint;
    private void init() {
        textPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
        textPaint.setTextSize(200);
        textPaint.setTypeface(Typeface.DEFAULT);
        textPaint.setColor(Color.RED);
        minRect = new Rect();
        textPaint.getTextBounds(text, 0, text.length(), minRect);
        textWidth = minRect.width();
        textHeight = minRect.height();
        Log.i("tag", minRect.left + "");
        Log.i("tag", minRect.top + "");
        Log.i("tag", minRect.right + "");
        Log.i("tag", minRect.bottom + "");

        pointPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        pointPaint.setStrokeWidth(10);
        pointPaint.setColor(Color.BLACK);

        rectPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        rectPaint.setStyle(Paint.Style.FILL);
        rectPaint.setColor(Color.GREEN);
        rectF = new RectF();
    }

    private int originX;
    private int originY;
    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        //以(0,0)為源點(diǎn)繪制文字的話，文字則會(huì)完全落入到這個(gè)最小矩形里面。
        textPaint.setTextAlign(Paint.Align.LEFT);
        originX = 0;
        originY = 0;
        canvas.drawRect(minRect, rectPaint);
        canvas.drawText(text, originX, originY,  textPaint);
        canvas.drawPoint(originX, originY, pointPaint);

        /**
         *      _ _ _ _ _
         *     |         |
         *     |  (x,y)  |
         *     |----·    |height
         *     |    |    |
         *     |    |    |
         *     ·- - · - -·
         *        width
         *
         *  以指定點(diǎn)(x,y)為中心繪制文字，方框?yàn)榇L制文字所在的最小矩形，則矩形的各頂點(diǎn)均可以通過簡單的邏輯換算得到。
         *  下面分別以Paint.Align.LEFT，Paint.Align.RIGHT和Paint.Align.CENTER三種方式繪制文字，
         *  其繪制源點(diǎn)分別為矩形底邊的左右中三點(diǎn)
         */

        originX = getMeasuredWidth() / 2;
        //Paint.Align.LEFT
        textPaint.setTextAlign(Paint.Align.LEFT);
        originY = 200;
        rectF.set(originX - textWidth / 2, originY - textHeight / 2, originX + textWidth / 2, originY + textHeight / 2);
        canvas.drawRect(rectF, rectPaint);
        canvas.drawText(text, originX - textWidth / 2, originY + textHeight / 2,  textPaint);
        canvas.drawPoint(originX, originY, pointPaint);

        //Paint.Align.RIGHT
        textPaint.setTextAlign(Paint.Align.RIGHT);
        originY = 500;
        rectF.set(originX - textWidth / 2, originY - textHeight / 2, originX + textWidth / 2, originY + textHeight / 2);
        canvas.drawRect(rectF, rectPaint);
        canvas.drawText(text, originX + textWidth / 2, originY + textHeight / 2,  textPaint);
        canvas.drawPoint(originX, originY, pointPaint);

        //Paint.Align.CENTER
        textPaint.setTextAlign(Paint.Align.CENTER);
        originY = 800;
        rectF.set(originX - textWidth / 2, originY - textHeight / 2, originX + textWidth / 2, originY + textHeight / 2);
        canvas.drawRect(rectF, rectPaint);
        canvas.drawText(text, originX, originY + textHeight / 2,  textPaint);
        canvas.drawPoint(originX, originY, pointPaint);

    }
}

效果圖：

于是，對于在Align.LEFT和Align.RIGHT時(shí)繪制文字會(huì)出現(xiàn)一點(diǎn)偏移這個(gè)問題，我做出了如下猜想：
當(dāng)textPaint的Align方式為LEFT或RIGHT時(shí)，系統(tǒng)不會(huì)在x處就開始往右或往左繪制文字，而是會(huì)留出一定的空間再開始繪制，目的應(yīng)該就是當(dāng)x為0或者為屏幕寬度時(shí)繪制的文字不會(huì)緊貼著屏幕邊緣，那樣會(huì)顯得不美觀。
那這個(gè)空間到底是多大呢?就是minRect.left的值。所以想要文字在x處就開始繪制的話，當(dāng)Align為LEFT時(shí)，x的值要減去minRect.left，而當(dāng)Align為RIGHT時(shí)，x的值要加上minRect.left。
修改的程序：

public class DrawTextView extends View{

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

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

    public DrawTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private TextPaint textPaint;
    private String text = "g";
    private Rect minRect;
    private int textWidth;
    private int textHeight;

    private Paint rectPaint;
    private RectF rectF;

    private Paint pointPaint;
    private void init() {
        textPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
        textPaint.setTextSize(200);
        textPaint.setTypeface(Typeface.DEFAULT);
        textPaint.setColor(Color.RED);
        minRect = new Rect();
        textPaint.getTextBounds(text, 0, text.length(), minRect);
        textWidth = minRect.width();
        textHeight = minRect.height();
        Log.i("tag", minRect.left + "");
        Log.i("tag", minRect.top + "");
        Log.i("tag", minRect.right + "");
        Log.i("tag", minRect.bottom + "");

        pointPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        pointPaint.setStrokeWidth(10);
        pointPaint.setColor(Color.BLACK);

        rectPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        rectPaint.setStyle(Paint.Style.FILL);
        rectPaint.setColor(Color.GREEN);
        rectF = new RectF();
    }

    private int originX;
    private int originY;
    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        //以(0,0)為源點(diǎn)繪制文字的話，文字則會(huì)完全落入到這個(gè)最小矩形里面。
        textPaint.setTextAlign(Paint.Align.LEFT);
        originX = 0;
        originY = 0;
        canvas.drawRect(minRect, rectPaint);
        canvas.drawText(text, originX, originY,  textPaint);
        canvas.drawPoint(originX, originY, pointPaint);

        /**
         *      _ _ _ _ _
         *     |         |
         *     |  (x,y)  |
         *     |----·    |height
         *     |    |    |
         *     |    |    |
         *     ·- - · - -·
         *        width
         *
         *  以指定點(diǎn)(x,y)為中心繪制文字，方框?yàn)榇L制文字所在的最小矩形，則矩形的各頂點(diǎn)均可以通過簡單的邏輯換算得到。
         *  下面分別以Paint.Align.LEFT，Paint.Align.RIGHT和Paint.Align.CENTER三種方式繪制文字，
         *  其繪制源點(diǎn)分別為矩形底邊的左右中三點(diǎn)
         */

        originX = getMeasuredWidth() / 2;
        //Paint.Align.LEFT
        textPaint.setTextAlign(Paint.Align.LEFT);
        originY = 200;
        rectF.set(originX - textWidth / 2, originY - textHeight / 2, originX + textWidth / 2, originY + textHeight / 2);
        canvas.drawRect(rectF, rectPaint);
        canvas.drawText(text, originX - textWidth / 2 - minRect.left, originY + textHeight / 2,  textPaint);
        canvas.drawPoint(originX, originY, pointPaint);

        //Paint.Align.RIGHT
        textPaint.setTextAlign(Paint.Align.RIGHT);
        originY = 500;
        rectF.set(originX - textWidth / 2, originY - textHeight / 2, originX + textWidth / 2, originY + textHeight / 2);
        canvas.drawRect(rectF, rectPaint);
        canvas.drawText(text, originX + textWidth / 2 + minRect.left, originY + textHeight / 2,  textPaint);
        canvas.drawPoint(originX, originY, pointPaint);

        //Paint.Align.CENTER
        textPaint.setTextAlign(Paint.Align.CENTER);
        originY = 800;
        rectF.set(originX - textWidth / 2, originY - textHeight / 2, originX + textWidth / 2, originY + textHeight / 2);
        canvas.drawRect(rectF, rectPaint);
        canvas.drawText(text, originX, originY + textHeight / 2,  textPaint);
        canvas.drawPoint(originX, originY, pointPaint);

    }
}

修改后的效果：

這就正常了?？赡苡腥藭?huì)發(fā)現(xiàn)在Paint.Align.RIGHT和Paint.Align.CENTER時(shí)其實(shí)文字還是有點(diǎn)偏左，沒錯(cuò)，但是只要繪制另外的文字，比如說繪制字母“y”就完全沒問題了，猜想可能是字母“g”這個(gè)字本身的特點(diǎn)，再者這點(diǎn)偏差也是在接受范圍內(nèi)的，特別是在沒有那綠色區(qū)域可比較的時(shí)候就更不明顯了。

然而事情并沒有結(jié)束，雖然說“g”的尾巴在baseline的下面是正常的，但是由于需求的原因，還是希望“g”能整體落在最小矩形里面，畢竟需求是“以指定點(diǎn)(x,y)為中心繪制文字”嘛，有了上面的經(jīng)驗(yàn)，馬上就能想到了minRect.bottom，因?yàn)樵谝?0,0)為源點(diǎn)繪制“g”的時(shí)候，“g”在baseline以下的部分剛好出現(xiàn)在了屏幕里面。

這樣的話是不是只要將繪制的源點(diǎn)往上移動(dòng)minRect.bottom，即y - minRect.bottom就行了呢？試一試：

public class DrawTextView extends View{

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

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

    public DrawTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private TextPaint textPaint;
    private String text = "g";
    private Rect minRect;
    private int textWidth;
    private int textHeight;

    private Paint rectPaint;
    private RectF rectF;

    private Paint pointPaint;
    private void init() {
        textPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
        textPaint.setTextSize(200);
        textPaint.setTypeface(Typeface.DEFAULT);
        textPaint.setColor(Color.RED);
        minRect = new Rect();
        textPaint.getTextBounds(text, 0, text.length(), minRect);
        textWidth = minRect.width();
        textHeight = minRect.height();
        Log.i("tag", minRect.left + "");
        Log.i("tag", minRect.top + "");
        Log.i("tag", minRect.right + "");
        Log.i("tag", minRect.bottom + "");

        pointPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        pointPaint.setStrokeWidth(10);
        pointPaint.setColor(Color.BLACK);

        rectPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        rectPaint.setStyle(Paint.Style.FILL);
        rectPaint.setColor(Color.GREEN);
        rectF = new RectF();
    }

    private int originX;
    private int originY;
    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        //以(0,0)為源點(diǎn)繪制文字的話，文字則會(huì)完全落入到這個(gè)最小矩形里面。
        textPaint.setTextAlign(Paint.Align.LEFT);
        originX = 0;
        originY = 0;
        canvas.drawRect(minRect, rectPaint);
        canvas.drawText(text, originX, originY,  textPaint);
        canvas.drawPoint(originX, originY, pointPaint);

        /**
         *      _ _ _ _ _
         *     |         |
         *     |  (x,y)  |
         *     |----·    |height
         *     |    |    |
         *     |    |    |
         *     ·- - · - -·
         *        width
         *
         *  以指定點(diǎn)(x,y)為中心繪制文字，方框?yàn)榇L制文字所在的最小矩形，則矩形的各頂點(diǎn)均可以通過簡單的邏輯換算得到。
         *  下面分別以Paint.Align.LEFT，Paint.Align.RIGHT和Paint.Align.CENTER三種方式繪制文字，
         *  其繪制源點(diǎn)分別為矩形底邊的左右中三點(diǎn)
         */

        originX = getMeasuredWidth() / 2;
        //Paint.Align.LEFT
        textPaint.setTextAlign(Paint.Align.LEFT);
        originY = 200;
        rectF.set(originX - textWidth / 2, originY - textHeight / 2, originX + textWidth / 2, originY + textHeight / 2);
        canvas.drawRect(rectF, rectPaint);
        canvas.drawText(text, originX - textWidth / 2 - minRect.left, originY + textHeight / 2 - minRect.bottom,  textPaint);
        canvas.drawPoint(originX, originY, pointPaint);

        //Paint.Align.RIGHT
        textPaint.setTextAlign(Paint.Align.RIGHT);
        originY = 500;
        rectF.set(originX - textWidth / 2, originY - textHeight / 2, originX + textWidth / 2, originY + textHeight / 2);
        canvas.drawRect(rectF, rectPaint);
        canvas.drawText(text, originX + textWidth / 2 + minRect.left, originY + textHeight / 2 - minRect.bottom,  textPaint);
        canvas.drawPoint(originX, originY, pointPaint);

        //Paint.Align.CENTER
        textPaint.setTextAlign(Paint.Align.CENTER);
        originY = 800;
        rectF.set(originX - textWidth / 2, originY - textHeight / 2, originX + textWidth / 2, originY + textHeight / 2);
        canvas.drawRect(rectF, rectPaint);
        canvas.drawText(text, originX, originY + textHeight / 2 - minRect.bottom,  textPaint);
        canvas.drawPoint(originX, originY, pointPaint);

    }
}

運(yùn)行一下：

Good！?。≡僭囋?yán)L制其它文字：

沒問題，OK，那么到此為止，“以指定點(diǎn)(x,y)為中心繪制文字”這個(gè)需求就算完成了。

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以指定點(diǎn)(x,y)為中心繪制文字

以指定點(diǎn)(x,y)為中心繪制文字

相關(guān)閱讀更多精彩內(nèi)容

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色偷偷精品伊人,欧洲久久精品,欧美综合婷婷骚逼,国产AV主播,国产最新探花在线,九色在线视频一区,伊人大交九 欧美,1769亚洲,黄色成人av

以指定點(diǎn)(x,y)為中心繪制文字

相關(guān)閱讀更多精彩內(nèi)容

友情鏈接更多精彩內(nèi)容

色偷偷精品伊人,欧洲久久精品,欧美综合婷婷骚逼,国产AV主播,国产最新探花在线,九色在线视频一区,伊人大交九欧美,1769亚洲,黄色成人av