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private static class HalfCircleView extends View {
private static final float SWEEP_INC = 2;
private boolean isAlive = false;
private float width ;
private float height ;
private Paint mPaint;
private RectF mHalfCircle;
// 시작위치
private float startPoint = 180;
private float endPoint = 180;
// 시간
private float mSweep ;
//선 굵기
private int strokeWidth = 10;
//색
private int[] colors = {Color.RED, Color.YELLOW, Color.GREEN, Color.CYAN, Color.BLUE,Color.MAGENTA, Color.RED};
//색 범위
float[] colorPos = {0.0f, 0.17f, 0.34f, 0.51f, 0.68f, 0.85f, 1.0f};
public float[] getColorPos() {
return colorPos;
}
public int[] getColors() {
return colors;
}
public int getStrokeWidth() {
return strokeWidth;
}
public void setStrokeWidth(int strokeWidth) {
this.strokeWidth = strokeWidth;
}
public float getStartPoint() {
return startPoint;
}
public float getEndPoint() {
return endPoint;
}
public void setEndPoint(float endPoint) {
this.endPoint = endPoint;
}
public HalfCircleView(Context context , float width , float height) {
super(context);
this.width = width;
this.height = height;
//반원 좌표
mHalfCircle = new RectF((float)(width * 0.1), (float)(height *0.2), (float)(width * 0.9), (float)(height * 1.6));
}
/**
* Draw 시작
*/
public void startDraw(){
initData();
isAlive = true;
invalidate();
}
/**
* 데이터 초기화
*/
private void initData(){
startPoint = getStartPoint();
endPoint = getEndPoint();
//페인트
mPaint = new Paint();
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeWidth(getStrokeWidth());
int[] colors = getColors();
float[] color_pos = getColorPos();
LinearGradient shader = new LinearGradient(0, 0, width, height, colors, color_pos,Shader.TileMode.CLAMP);
mPaint.setShader(shader);
}
/**
* draw 원
* @param canvas
* @param oval
* @param useCenter
* @param startPoint
* @param paint
*/
private void drawArcs(Canvas canvas, RectF oval, boolean useCenter,float startPoint ,Paint paint) {
canvas.drawArc(oval, startPoint, mSweep, useCenter, paint);
}
@Override protected void onDraw(Canvas canvas) {
//배경색
canvas.drawColor(Color.WHITE);
//선
drawArcs(canvas, mHalfCircle, false, getStartPoint(), mPaint);
//반원만
mSweep += SWEEP_INC;
if (mSweep > 180) {
isAlive = false;
}
if (mSweep > endPoint) {
isAlive = false;
}
if(isAlive){
invalidate();
}
}
}
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