我要开发应用程序，我想创建像 Catch notes App 这样的菜单
屏幕截图
任何知道我如何实现此功能或是否有可用的库的人。请告诉我。
谢谢
最佳答案
我最近创建了这个圆形菜单以添加到我最近的项目中。看起来像
您需要创建一个新 View 并绘制此 View ，检查用户输入(他正在触摸的位置)，设计一个反馈机制，例如，在我看来，如果用户触摸了 5 个弧中的任何一个，背景颜色变为天蓝色。这是我的 View 类代码。
[编辑]:这次我发布了我所有的 View 代码。希望对你有帮助。
public class SmallCircleView extends View{
private Paint smallCircleCore;
private Paint lineCore;
private Paint bigArc;
private Paint bigArcDraw;
private Paint pencil;
private Paint middleCircleBody;
private Paint arcTouchedBack;
private Paint circlePaint;
private int initial, midInitial;
private int finalangle;
private int middleCircleRadius;
private int i =0;
private int centerCircleradius;
int[] colors = new int[]{0xFF33B5E5,
0xFFAA66CC,
0xFF99CC00,
0xFFFFBB33,
0xFFFF4444,
0xFF0099CC,
0xFFAA66CC,
0xFF669900,
0xFFFF8800,
0xFFCC0000};
private RectF oval = new RectF();
private RectF middleOval = new RectF();
private RectF finalOVal = new RectF();
private Context context;
private int px, py;
private boolean isClicked = true;
private boolean[] arcTouched= new boolean[]{false, false, false, false, false};
EmbossMaskFilter emboss;
EmbossMaskFilter forBig;
private ArrayList<Bitmap> bitmap = new ArrayList<Bitmap>();
public SmallCircleView(Context context) {
super(context);
this.context = context;
initSmallCircle();
// TODO Auto-generated constructor stub
}
public SmallCircleView(Context context, AttributeSet attri)
{
super(context, attri);
this.context = context;
initSmallCircle();
}
public SmallCircleView(Context context, AttributeSet attri, int defaultStyle)
{
super(context, attri, defaultStyle);
this.context = context;
initSmallCircle();
}
private void initSmallCircle()
{
setFocusable(true);
smallCircleCore = new Paint(Paint.ANTI_ALIAS_FLAG);
lineCore = new Paint(Paint.ANTI_ALIAS_FLAG);
bigArc = new Paint(Paint.ANTI_ALIAS_FLAG);
pencil = new Paint(Paint.ANTI_ALIAS_FLAG);
lineCore.setColor(0xFFFFFFFF);
lineCore.setStyle(Paint.Style.FILL);
lineCore.setStrokeWidth(4);
//bigCircleCore.setStrokeWidth(5);
smallCircleCore.setStyle(Paint.Style.FILL);
smallCircleCore.setColor(0xFFFFFFFF);
bigArc.setColor(0xFF424242);
bigArc.setStyle(Paint.Style.FILL);
bigArcDraw = new Paint(smallCircleCore);
bigArcDraw.setStrokeWidth(4);
bigArcDraw.setColor(0xFF000000);
pencil.setStrokeWidth(0.5f);
pencil.setColor(0x80444444);
pencil.setStyle(Paint.Style.STROKE);
middleCircleBody = new Paint(bigArc);
middleCircleBody.setColor(0xFFE6E6E6);
arcTouchedBack = new Paint(Paint.ANTI_ALIAS_FLAG);
arcTouchedBack.setColor(0xFF81DAF5);
arcTouchedBack.setStyle(Paint.Style.FILL);
circlePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
circlePaint.setStyle(Paint.Style.STROKE);
circlePaint.setStrokeWidth(10);
float[] direection = new float[]{1,1,1};
float light = 0.4f;
float specualr = 6;
float blur = 3.5f;
emboss = new EmbossMaskFilter(direection, light, specualr, blur);
forBig = new EmbossMaskFilter(direection, 1f, 4, 2.5f);
bitmap.clear();
bitmap.add(BitmapFactory.decodeResource(getResources(), R.drawable.tasks));
bitmap.add(BitmapFactory.decodeResource(getResources(), R.drawable.file_manager));
bitmap.add(BitmapFactory.decodeResource(getResources(), R.drawable.home));
bitmap.add(BitmapFactory.decodeResource(getResources(), R.drawable.contacts));
bitmap.add(BitmapFactory.decodeResource(getResources(), R.drawable.reminder));
middleCircleBody.setMaskFilter(forBig);
bigArc.setMaskFilter(forBig);
String log="";
Log.d(log, "Value of px & py " + getMeasuredWidth() + " " + getMeasuredHeight());
}
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
int measuredWidth = measure(widthMeasureSpec);
int measuredHeight = measure(heightMeasureSpec);
int d = Math.min(measuredWidth, measuredHeight);
setMeasuredDimension(d,d);
}
private int measure(int measureSpec)
{
int result = 0;
int specMode = MeasureSpec.getMode(measureSpec);
int specSize = MeasureSpec.getSize(measureSpec);
if(specMode == MeasureSpec.UNSPECIFIED)
{
result = 200;
}
else
{
result = specSize;
}
return result;
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
px = getMeasuredWidth()/2;
py = getMeasuredHeight();
initial = 144;
finalangle = 252;
centerCircleradius = 30;
middleCircleRadius = 140;
int init, fina;
init = 160;
fina = 360;
finalOVal.set(px-middleCircleRadius-4, py-middleCircleRadius-4, px+middleCircleRadius+4, py+middleCircleRadius+4);
middleOval.set(px-middleCircleRadius, py-middleCircleRadius, px+middleCircleRadius, py+middleCircleRadius);
while(init<fina)
{
circlePaint.setColor(colors[i]);
canvas.drawArc(finalOVal,init,10,false, circlePaint);
i++;
if(i>=colors.length)
{
i=0;
}
init = init + 10;
}
//Setting Mask Filter
canvas.drawArc(middleOval, 180, 180, false, pencil);
midInitial = 180;
i=0;
//Creating the first Arc
if(arcTouched[0])
{
canvas.drawArc(middleOval, midInitial, 36, true, arcTouchedBack);
canvas.drawArc(middleOval, midInitial, 36, true, pencil);
}
else
{
canvas.drawArc(middleOval, midInitial, 36, true, middleCircleBody);
canvas.drawArc(middleOval, midInitial, 36, true, pencil);
}
canvas.drawBitmap(bitmap.get(0), null, (putBitmapTo(midInitial, 36, 140, px, py)), null);
midInitial+=36;
if(arcTouched[1])
{
canvas.drawArc(middleOval, midInitial, 36, true, arcTouchedBack);
canvas.drawArc(middleOval, midInitial, 36, true, pencil);
}
else
{
canvas.drawArc(middleOval, midInitial, 36, true, middleCircleBody);
canvas.drawArc(middleOval, midInitial, 36, true, pencil);
}
canvas.drawBitmap(bitmap.get(1), null, (putBitmapTo(midInitial, 36, 140, px, py)), null);
midInitial+=36;
if(arcTouched[2])
{
canvas.drawArc(middleOval, midInitial, 36, true, arcTouchedBack);
canvas.drawArc(middleOval, midInitial, 36, true, pencil);
}
else
{
canvas.drawArc(middleOval, midInitial, 36, true, middleCircleBody);
canvas.drawArc(middleOval, midInitial, 36, true, pencil);
}
canvas.drawBitmap(bitmap.get(2), null, (putBitmapTo(midInitial, 36, 140, px, py)), null);
midInitial+=36;
//Creatring the second Arc
if(arcTouched[3])
{
canvas.drawArc(middleOval, midInitial, 36, true, arcTouchedBack);
canvas.drawArc(middleOval, midInitial, 36, true, pencil);
}
else
{
canvas.drawArc(middleOval, midInitial, 36, true, middleCircleBody);
canvas.drawArc(middleOval, midInitial, 36, true, pencil);
}
canvas.drawBitmap(bitmap.get(3), null, (putBitmapTo(midInitial, 36, 140, px, py)), null);
midInitial+=36;
if(arcTouched[4])
{
canvas.drawArc(middleOval, midInitial, 36, true, arcTouchedBack);
canvas.drawArc(middleOval, midInitial, 36, true, pencil);
}
else
{
canvas.drawArc(middleOval, midInitial, 36, true, middleCircleBody);
canvas.drawArc(middleOval, midInitial, 36, true, pencil);
}
canvas.drawBitmap(bitmap.get(4), null, (putBitmapTo(midInitial, 36, 140, px, py)), null);
canvas.drawCircle(px, py-10, 40, pencil);
canvas.drawCircle(px, py-10, 39, smallCircleCore);
canvas.drawCircle(px, py-10, 35, bigArc);
canvas.drawCircle(px, py-10, 20, smallCircleCore);
canvas.drawCircle(px, py-10, 15, bigArc);
canvas.drawLine(px-8, py-10, px+8, py-10, lineCore);
canvas.save();
}
@Override
public boolean onTouchEvent(MotionEvent event) {
// TODO Auto-generated method stub
float centerX = px;
float centerY = (py-centerCircleradius+(centerCircleradius/4));
switch(event.getAction())
{
case MotionEvent.ACTION_DOWN:
{
if(isInSideCenterCircle(centerX, centerY, centerCircleradius, event.getX(), event.getY()))
{
return super.onTouchEvent(event);
}
if(isInArc(180, 36, middleCircleRadius, px, py, event.getX(), event.getY()))
{
makeAllFalse();
arcTouched[0] = true;
invalidate();
return true;
}
if(isInArc(216, 36, middleCircleRadius, px, py, event.getX(), event.getY()))
{
makeAllFalse();
arcTouched[1] = true;
invalidate();
return true;
}
if(isInArc(252, 36, middleCircleRadius, px, py, event.getX(), event.getY()))
{
makeAllFalse();
arcTouched[2] = true;
invalidate();
return true;
}
if(isInArc(288,36, middleCircleRadius, px, py, event.getX(), event.getY()))
{
makeAllFalse();
arcTouched[3] = true;
invalidate();
return true;
}
if(isInArc(324, 36, middleCircleRadius, px, py, event.getX(), event.getY()))
{
makeAllFalse();
arcTouched[4] = true;
invalidate();
return true;
}
}
case MotionEvent.ACTION_UP:
{
if(isInSideCenterCircle(centerX, centerY, centerCircleradius, event.getX(), event.getY()))
{
return super.onTouchEvent(event);
}
if(isInArc(180, 36, middleCircleRadius, px, py, event.getX(), event.getY()))
{
Toast.makeText(getContext(), "In the first Arc !!!", Toast.LENGTH_SHORT).show();
makeAllFalse();
invalidate();
return false;
}
if(isInArc(216, 36, middleCircleRadius, px, py, event.getX(), event.getY()))
{
Toast.makeText(getContext(), "In Second Arc", Toast.LENGTH_SHORT).show();
makeAllFalse();
invalidate();
return false;
}
if(isInArc(252, 36, middleCircleRadius, px, py, event.getX(), event.getY()))
{
Toast.makeText(getContext(), "In Third Arc", Toast.LENGTH_SHORT).show();
makeAllFalse();
invalidate();
return false;
}
if(isInArc(288,36, middleCircleRadius, px, py, event.getX(), event.getY()))
{
Toast.makeText(getContext(), "In fourth Arc", Toast.LENGTH_SHORT).show();
makeAllFalse();
invalidate();
return false;
}
if(isInArc(324, 36, middleCircleRadius, px, py, event.getX(), event.getY()))
{
Toast.makeText(getContext(), "In Fifth Arc", Toast.LENGTH_SHORT).show();
makeAllFalse();
invalidate();
return false;
}
else
{
makeAllFalse();
invalidate();
return super.onTouchEvent(event);
}
}
case MotionEvent.ACTION_MOVE:
{
if(isInSideCenterCircle(centerX, centerY, centerCircleradius, event.getX(), event.getY()))
{
makeAllFalse();
invalidate();
return super.onTouchEvent(event);
}
if(isInArc(180, 36, middleCircleRadius, px, py, event.getX(), event.getY()))
{
makeAllFalse();
arcTouched[0] = true;
invalidate();
return false;
}
if(isInArc(216, 36, middleCircleRadius, px, py, event.getX(), event.getY()))
{
makeAllFalse();
arcTouched[1] = true;
invalidate();
return false;
}
if(isInArc(252, 36, middleCircleRadius, px, py, event.getX(), event.getY()))
{
makeAllFalse();
arcTouched[2] = true;
invalidate();
return false;
}
if(isInArc(288,36, middleCircleRadius, px, py, event.getX(), event.getY()))
{
makeAllFalse();
arcTouched[3] = true;
invalidate();
return false;
}
if(isInArc(324, 36, middleCircleRadius, px, py, event.getX(), event.getY()))
{
makeAllFalse();
arcTouched[4] = true;
invalidate();
return false;
}
else
{
makeAllFalse();
invalidate();
return super.onTouchEvent(event);
}
}
}
return super.onTouchEvent(event);
}
private boolean isInSideCenterCircle(float centerX, float centerY, float radius, float co_ordinateX, float co_ordinateY)
{
return ((Math.pow((centerX-co_ordinateX),2))+(Math.pow((centerY-co_ordinateY),2))-Math.pow(radius, 2))<=0;
}
private void changeIsClicked()
{
isClicked =(isClicked?(false):(true));
}
private RectF putBitmapTo(int startAngle, int SweepAngle, float radius, float centerX, float centerY)
{
float locx = (float) (centerX +((radius/17*11)*Math.cos(Math.toRadians(
(startAngle+SweepAngle+startAngle)/2
))
));
float locy = (float) (centerY + ((radius/17*11)*Math.sin(Math.toRadians(
(startAngle+SweepAngle+startAngle)/2
))
));
return new RectF(locx-20, locy-20, locx+20, locy+20);
}
private boolean isInArc(int startAngle, int SweepAngle, float radius, float centerX, float centerY, float toCheckX, float toCheckY)
{
double degree;
if(
(Math.pow(centerX - toCheckX, 2) +
Math.pow(centerY - toCheckY, 2) -
Math.pow(radius, 2))<=0)
{
double radian = Math.atan((centerY-toCheckY)/(centerX-toCheckX));
if(radian<0)
{
degree = Math.toDegrees(radian);
degree = 360+ degree;
}
else
{
degree = Math.toDegrees(radian);
degree = 180 + degree;
}
if(degree>=startAngle)
{
if(degree<=(startAngle+SweepAngle))
{
return true;
}
}
}
else
{
return false;
}
return false;
}
private void makeAllFalse()
{
for(int i=0;i<arcTouched.length;i++)
{
arcTouched[i] = false;
}
}
}
我知道这不是最好的方法，也不专业。我根据需要创建了这个菜单。在您更改角度计算之前，它无法以某种方式缩放。
关于Android Catch Notes 应用程序，如圆形菜单，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/12579224/
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