Android 自定义任意进度的好评星星(感觉有点怪怪的)
```
public class MyStarView extends View {
private Context mContext;
private Paint mPaint;
private Bitmap bgStar;
private Bitmap star;
private Rect mSrcRect, mDestRect;
private int starWidth, starHeight;
private int interval;
private int redStarCount = 0;
private float redStarCount2 = 0;
private int totalStarWith = 0;
public MyStarView(Context context) {
this(context, null);
}
public MyStarView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public MyStarView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
this.mContext = context;
totalStarWith = convertDIP2PX(55);
starWidth = convertDIP2PX(11);
starHeight = convertDIP2PX(10);
interval = convertDIP2PX(5);
mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
bgStar = ((BitmapDrawable) ContextCompat.getDrawable(mContext, R.drawable.img_star_grey)).getBitmap();
star = ((BitmapDrawable) ContextCompat.getDrawable(mContext, R.drawable.img_star_red)).getBitmap();
mSrcRect = new Rect(0, 0, starWidth, starHeight);
mDestRect = new Rect(0, 0, starWidth, starHeight);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
setMeasuredDimension(MeasureSpec.makeMeasureSpec(totalStarWith + 4 * interval, MeasureSpec.EXACTLY),
MeasureSpec.makeMeasureSpec(starHeight, MeasureSpec.EXACTLY));
}
@Override
protected void onDraw(Canvas canvas) {
mSrcRect.set(0, 0, starWidth, starHeight);
for (int i = 0; i < 5; i++) {
mDestRect.set((interval + starWidth) * i, 0, (interval + starWidth) * i + starWidth, starHeight);
canvas.drawBitmap(bgStar, mSrcRect, mDestRect, mPaint);
}
for (int j = 0; j < redStarCount; j++) {
mDestRect.set((interval + starWidth) * j, 0, (interval + starWidth) * j + starWidth, starHeight);
canvas.drawBitmap(star, mSrcRect, mDestRect, mPaint);
}
if(redStarCount2 != 0) {
mSrcRect.set(0, 0, (int)(redStarCount2 * starWidth), starHeight);
mDestRect.set((interval + starWidth) * redStarCount, 0, (interval + starWidth) * redStarCount + (int)(redStarCount2 * starWidth), starHeight);
canvas.drawBitmap(star, mSrcRect, mDestRect, mPaint);
}
}
public void setStar(float star) {
float w = star / 100 * totalStarWith;
float starW = w / starWidth;
redStarCount = (int)starW; // 整数个星星
redStarCount2 = starW - redStarCount; // 不完整的星星
requestLayout();
// invalidate();
}
//转换dip为px
public int convertDIP2PX(int dip) {
float scale = mContext.getResources().getDisplayMetrics().density;
return (int)(dip*scale + 0.5f*(dip>=0?1:-1));
}
}
```
先贴代码，等有时间了再来详细的说一下然后配图。