2012-01-30 65 views
1

我有以下代碼來繪製文本。獲取渲染文本的高度,這相當於使用paint.measureText渲染的文本寬度

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

    Paint paint = new Paint(); 
    paint.setTextSize(400); 
    paint.setColor(Color.WHITE); 
    paint.setAntiAlias(true); 
    paint.setTextAlign(Align.LEFT); 
    paint.setStyle(Style.FILL); 
    String text = "698"; 
    Rect bounds = new Rect(); 
    paint.getTextBounds(text, 0, text.length(), bounds); 

    int textWidth = bounds.width();   
    int textHeight = bounds.height(); 

    Bitmap originalBitmap = Bitmap.createBitmap(textWidth, 
      textHeight, Bitmap.Config.ARGB_8888); 
    Canvas singleUseCanvas = new Canvas(originalBitmap); 
    singleUseCanvas.drawColor(Color.BLUE); 
    singleUseCanvas.drawText(text, 0, textHeight, paint); 
    canvas.drawBitmap(originalBitmap, 0, 0, null); 
} 

我越來越不期望的結果,其右側和底部被裁剪。

enter image description here

我避開右側裁剪,通過使用

float textWidth = paint.measureText(text); 
Bitmap originalBitmap = Bitmap.createBitmap((int)(textWidth + 0.5), 
       textHeight, Bitmap.Config.ARGB_8888); 

我得到了以下改進

enter image description here

呢。我的底部仍在裁剪。我可以知道獲取渲染文本高度的正確方法是什麼,這與使用paint.measureText渲染文本寬度類比嗎?

回答