根据宽度自动调节大小的textview

public classAutoFitTextViewextendsTextView {

privatePaintmTextPaint;

private floatmTextSize;

publicAutoFitTextView(Context context) {

super(context);

}

publicAutoFitTextView(Context context,AttributeSet attrs) {

super(context,attrs);

}

@Override

protected voidonDraw(Canvas canvas) {

super.onDraw(canvas);

refitText(this.getText().toString(), this.getWidth());

}

private voidrefitText(String text, inttextViewWidth) {

if(text ==null|| textViewWidth <=0)

return;

mTextPaint=newPaint();

mTextPaint.set(this.getPaint());

intavailableTextViewWidth = getWidth() - getPaddingLeft() - getPaddingRight();

float[] charsWidthArr =new float[text.length()];

Rect boundsRect =newRect();

mTextPaint.getTextBounds(text,0,text.length(),boundsRect);

inttextWidth = boundsRect.width();

mTextSize= getTextSize();

while(textWidth > availableTextViewWidth) {

mTextSize-=1;

mTextPaint.setTextSize(mTextSize);

textWidth =mTextPaint.getTextWidths(text,charsWidthArr);

}

this.setTextSize(TypedValue.COMPLEX_UNIT_PX,mTextSize);

}

}