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我正在创建一个自定义视图，其中45％的弧线围绕圆形图像旋转。 我已经实现了这一点，但动画减慢作为动画收益和某个时候停止后，任何人可以帮助我什么是具有相同的问题，画布动画放慢
下面的代码
public class GlowCircle extends ImageView {
private Context context;
private Paint paintBitmap,paintRing;
private Bitmap imageBitmap;
private Path path;
private int width,height;
private float radius;
private RectF oval,dst;
private String tag="GlowCircle";
private int i=0;
private float strokeWith;
private float strokeMultiplier=1/10f;
// Constructors
public GlowCircle(Context context) {
super(context);
initView(context);
}
public GlowCircle(Context context, AttributeSet attrs) {
super(context, attrs);
initView(context);
}
public GlowCircle(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
initView(context);
}
// Overriden Methods
@Override
public void setImageResource(int resId) {
super.setImageResource(resId);
initView(context);
}
@Override
public void setImageBitmap(Bitmap bm) {
super.setImageBitmap(bm);
initView(context);
}
@Override
public void setImageURI(Uri uri) {
super.setImageURI(uri);
initView(context);
}
@Override
protected void onLayout(boolean changed, int left, int top, int right,
int bottom) {
super.onLayout(changed, left, top, right, bottom);
width=getMeasuredWidth();
height=getMeasuredHeight();
if (width<height){ //radius is smallest measurement with 1px padding
strokeWith=strokeMultiplier*width;
radius=(width/2f)-strokeWith;
}else{
strokeWith=strokeMultiplier*height;
radius=(height/2f)-strokeWith;
}
paintRing.setStrokeWidth(strokeWith);
Log.v(tag, "width: "+width+"str: "+strokeWith+"ra: "+radius);
}
@Override
protected void onDraw(Canvas canvas) {
if (imageBitmap==null){
Log.v(tag, "bitmap null");
return;
}
dst.set(strokeWith, strokeWith, width-strokeWith, height-strokeWith);
oval.set(strokeWith/2, strokeWith/2, width-strokeWith/2, height-strokeWith/2);
canvas.save();
path.addCircle(width/2, height/2, radius, Direction.CCW);
canvas.clipPath(path);
canvas.drawBitmap(imageBitmap, null ,dst, paintBitmap);
canvas.restore();
if (i>360){
i=0;
}
canvas.drawArc(oval, i++, 45,false, paintRing);
invalidate();
}
// Class Functions
private void initView(Context context){
this.context=context;
paintBitmap=new Paint();
paintRing=new Paint();
paintRing.setStyle(Style.STROKE);
paintBitmap.setAntiAlias(true);
paintRing.setAntiAlias(true);
paintBitmap.setFilterBitmap(true);
paintBitmap.setDither(true);// May slow try to remove but this may crash on lower devices
paintRing.setColor(Color.RED);
BitmapDrawable bitmapDrawable=(BitmapDrawable) getDrawable(); // this enables you to get the image;
imageBitmap=bitmapDrawable.getBitmap();
path=new Path();
dst=new RectF();
oval=new RectF();
}
}