Android自定义控件RatingBar调整字体大小的方法

package cc.rome753.demo.view;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.util.AttributeSet;import android.util.Log;import android.view.MotionEvent;import android.view.View;public class TextRatingBar extends View{ //paddingLeft private int mLeft; //paddingTop private int mTop; //当前rating private int mRating; //总raring数 private int mCount; //rating文字 private String[] texts = {"小","中","大","超大"}; //相邻raring的距离 private int mUnitSize; //bar到底部的距离 private int mYOffset; //小竖条的一半长度 private int mMarkSize; Paint paint = new Paint(); public TextRatingBar(Context context) { this(context, null); } public TextRatingBar(Context context, AttributeSet attrs) { this(context, attrs, 0); } public TextRatingBar(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); mCount = 4; mRating = 0; mMarkSize = 3; } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); Log.i("test", getMeasuredWidth() + " " + getMeasuredHeight()); mLeft = (getPaddingLeft()+getPaddingRight())/2; mTop = getPaddingTop(); int barWidth = getMeasuredWidth() - 2 * mLeft; mUnitSize = barWidth/(mCount - 1); mYOffset = getMeasuredHeight() - getPaddingBottom(); } @Override protected void onDraw(Canvas canvas) { paint.setStrokeWidth(2); paint.setColor(Color.RED); canvas.drawLine(mLeft,mYOffset,mLeft+mRating*mUnitSize,mYOffset,paint); for(int i=0;i<mCount;i++){  paint.setColor(Color.RED);  canvas.drawLine(mLeft+i*mUnitSize,mYOffset-mMarkSize,mLeft+i*mUnitSize,mYOffset+mMarkSize,paint);  paint.setColor(mRating == i &#63; Color.RED : Color.BLACK);  paint.setTextSize(30);  paint.setTextAlign(Paint.Align.CENTER);  canvas.drawText(texts[i],mLeft+i*mUnitSize,mTop,paint); } paint.setColor(Color.GRAY); canvas.drawLine(mLeft+mRating*mUnitSize,mYOffset,mLeft+(mCount-1)*mUnitSize,mYOffset,paint); canvas.drawCircle(mLeft+mRating*mUnitSize,mYOffset,10,paint); } @Override public boolean onTouchEvent(MotionEvent event) { if(event.getAction() == MotionEvent.ACTION_DOWN || event.getAction() == MotionEvent.ACTION_MOVE){  float x = event.getX();  for(int i=0;i<mCount;i++){  float distance = mLeft+i*mUnitSize - x;  if(Math.abs(distance) < 100){   setRating(i);   if(onRatingListener != null){   onRatingListener.onRating(mRating);   }   break;  }  } } return true; } public void setRating(int rating) { mRating = rating; invalidate(); } private OnRatingListener onRatingListener; public void setOnRatingListener(OnRatingListener onRatingListener) { this.onRatingListener = onRatingListener; } interface OnRatingListener{ void onRating(int rating); }}