android中canvas.drawText參數的介紹以及繪製一個文本置中的案例

標籤：就是   paint   ima   class   android中   images   text   分享圖片   length   

float baseline = height/2 + mPaint.getTextSize()/2 - mPaint.getFontMetrics().descent;文字尺寸就是

protected void onDraw(Canvas canvas) {      String testString = "測試：gafaeh:1234";      Paint mPaint = new Paint();      mPaint.setStrokeWidth(3);      mPaint.setTextSize(40);      mPaint.setColor(Color.RED);      mPaint.setTextAlign(Align.LEFT);      Rect bounds = new Rect();      mPaint.getTextBounds(testString, 0, testString.length(), bounds);      FontMetricsInt fontMetrics = mPaint.getFontMetricsInt();      int baseline = (getMeasuredHeight() + mPaint.getTextSize) / 2 - fontMetrics.descent;      canvas.drawText(testString,getMeasuredWidth() / 2 - bounds.width() / 2, baseline, mPaint);  }  

　　

android中canvas.drawText參數的介紹以及繪製一個文本置中的案例