我在圆的外环上显示点时遇到问题。当一个点放置在圆的边缘之一时,该点被截去一半。截图:https ://drive.google.com/file/d/0B9BaYaKRY3v3Y2hXYkpSOE1nY28/edit?usp=sharing
我只是想让圆的半径稍微小一点,以便在它周围有一些空间,外部点有一些空间。当然,圆圈必须仍然停留在视图的中间。非常感谢有关如何执行此操作的提示。
工作代码打击完全可以接受,因为点被切断了。(感谢@Sherif elKhatib 帮助创建 2 色圈)
public class PercentView extends View {
public PercentView(Context context) {
super(context);
init();
}
public PercentView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public PercentView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
private void init() {
paint = new Paint();
paint.setColor(Color.parseColor("#3498db"));
paint.setAntiAlias(true);
paint.setStyle(Paint.Style.FILL);
bgpaint = new Paint();
bgpaint.setColor(Color.parseColor("#2980b9"));
bgpaint.setAntiAlias(true);
bgpaint.setStyle(Paint.Style.FILL);
rect = new RectF();
circlePaint = new Paint();
}
Paint paint;
Paint bgpaint;
RectF rect;
float percentage = 5;
Paint circlePaint;
float[] dots = new float[1000];
int dotsNum = -1;
String[] colorCode = new String[1000];
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
// draw background circle anyway
canvas.drawArc(rect, -90, 360, true, bgpaint);
if (percentage != 0) {
int left = 0;
int width = getWidth();
int top = 0;
rect.set(left, top, left + width, top + width);
canvas.drawArc(rect, -90, (float) (3.6 * percentage), true, paint);
for (int i = 0; i <= dotsNum; i++) {
circlePaint.setAntiAlias(true);
circlePaint.setColor(Color.parseColor(colorCode[i]));
circlePaint.setStyle(Paint.Style.FILL);
float dotX = (float) (this.getWidth() / 2 + this.getWidth() / 2
* Math.cos((dots[i] * 3.6 - 90) * Math.PI / 180));
float dotY = (float) (this.getHeight() / 2 + this.getWidth()
/ 2 * Math.sin((dots[i] * 3.6 - 90) * Math.PI / 180));
canvas.drawCircle(dotX, dotY, 30, circlePaint);
}
}
}
public void setPercentage(float inpercentage) {
this.percentage = inpercentage;
invalidate();
}
public void setDot(int type) {
dotsNum++;
switch (type) {
case 0:
colorCode[dotsNum] = "#27ae60";
break;
case 1:
colorCode[dotsNum] = "#f1c40f";
break;
case 2:
colorCode[dotsNum] = "#e74c3c";
break;
case 3:
colorCode[dotsNum] = "#34495e";
break;
}
dots[dotsNum] = percentage;
invalidate();
}
}