Android 关于自定义TextView的测量

String mText = "测试";
int mTextSize = 30;
//使用画笔
Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
//设置文本大小
mPaint.setTextSize(mTextSize);
private Rect mTextBound = new Rect();
mPaint.getTextBounds(mText, 0, mText.length(), mTextBound);
//得到文本宽度
int mTextWidth = (int) mPaint.measureText(mText);

private int measureHeight(int measureSpec)  {
int mode = MeasureSpec.getMode(measureSpec);
int val = MeasureSpec.getSize(measureSpec);
int height= 0;
switch (mode)   {
case MeasureSpec.EXACTLY:
height= val;
break;
case MeasureSpec.AT_MOST:
case MeasureSpec.UNSPECIFIED:
height= mTextBound.height();
break;
}
height= mode == MeasureSpec.AT_MOST ? Math.min(result, val) : result;
return height+ getPaddingTop() + getPaddingBottom();
}

3.如何测量文本的高度

private int measureWidth(int measureSpec)  {
int mode = MeasureSpec.getMode(measureSpec);
int val = MeasureSpec.getSize(measureSpec);
int width= 0;
switch (mode)  {
case MeasureSpec.EXACTLY:
width= val;
break;
case MeasureSpec.AT_MOST:
case MeasureSpec.UNSPECIFIED:
width= mTextWidth;
break;
}
width= mode == MeasureSpec.AT_MOST ? Math.min(width, val) : width;
return width + getPaddingLeft() + getPaddingRight();
}