/**
* 画X，Y轴和边框
*
* @param canvas
*/
private void drawAxesLine(Canvas canvas) {
XYpaint = new Paint();
XYpaint.setColor(axesLineColor);
XYpaint.setAntiAlias(true);
XYpaint.setStyle(Style.FILL_AND_STROKE);
XYpaint.setStrokeWidth(chartFrameLineSize);
// 左侧Y轴
canvas.drawLine(
leftPadding + yTextWidth,
topPadding + topTextHeight,
leftPadding + yTextWidth,
height - bottomPadding - xTextHeight,
XYpaint);
// 三角箭头
Path yTriangle = new Path();
yTriangle.moveTo(leftPadding + yTextWidth - 10, topPadding + topTextHeight);
yTriangle.lineTo(leftPadding + yTextWidth, topPadding + topTextHeight - 20);
yTriangle.lineTo(leftPadding + yTextWidth + 10, topPadding + topTextHeight);
yTriangle.close();
canvas.drawPath(yTriangle, XYpaint);
// 下方X轴
canvas.drawLine(
leftPadding + yTextWidth,
height - bottomPadding - xTextHeight,
width - rightPadding,
height - bottomPadding - xTextHeight,
XYpaint);
// 三角箭头
Path xTriangle = new Path();
xTriangle.moveTo(width - rightPadding, height - bottomPadding - xTextHeight + 10);
xTriangle.lineTo(width - rightPadding + 15, height - bottomPadding - xTextHeight);
xTriangle.lineTo(width - rightPadding, height - bottomPadding - xTextHeight - 10);
xTriangle.close();
canvas.drawPath(xTriangle, XYpaint);
// 上方封顶
// canvas.drawLine(leftPadding + xTextHeight, topPadding + topTextHeight, width - rightPadding,
// topPadding + topTextHeight, XYpaint);
// 右侧封边
// canvas.drawLine(width - rightPadding, topPadding + topTextHeight, width - rightPadding,
// height - bottomPadding - xTextHeight, XYpaint);
}
/**
* 背景画网格的横线
*
* @param canvas
*/
private void drawGridLine(Canvas canvas) {
Paint paint = new Paint();
paint.setColor(gridLineColor);
paint.setAntiAlias(true);
paint.setStyle(Style.STROKE);
paint.setStrokeWidth(gridLineSize);
paint.setPathEffect(new DashPathEffect(new float[] {10, 20}, 0));
for (int i = 1; i <= yNum; i++) {
// 画网格的横线
canvas.drawLine(
leftPadding + yTextWidth,
height - bottomPadding - xTextHeight - (spaceYLength * i),
width - rightPadding,
height - bottomPadding - xTextHeight - (spaceYLength * i),
paint);
}
}
/**
* 画折线图，网格竖线，X坐标值
*
* @param canvas
*/
private void drawChartLine(Canvas canvas) {
Paint paintChart = new Paint();
paintChart.setColor(chartLineColor);
paintChart.setAntiAlias(true);
paintChart.setStyle(Style.STROKE);
paintChart.setStrokeWidth(chartLineSize);
Paint paintGrid = new Paint();
paintGrid.setColor(gridLineColor);
paintGrid.setAntiAlias(true);
paintGrid.setStyle(Style.STROKE);
paintGrid.setStrokeWidth(gridLineSize);
Paint paintTopText = new Paint();
paintTopText.setColor(axesLineColor);
paintTopText.setAntiAlias(true);
paintTopText.setSubpixelText(true);
paintTopText.setTypeface(Typeface.MONOSPACE);
paintTopText.setTextSize(topTextSize);
paintTopText.setTextAlign(Align.CENTER);
Paint paintBottomText = new Paint();
paintBottomText.setColor(axesLineColor);
paintBottomText.setAntiAlias(true);
paintBottomText.setSubpixelText(true);
paintBottomText.setTypeface(Typeface.MONOSPACE);
paintBottomText.setTextSize(bottomTextSize);
paintBottomText.setTextAlign(Align.CENTER);
Paint paintPoint = new Paint();
paintPoint.setColor(pointColor);
paintPoint.setAntiAlias(true);
paintPoint.setStyle(Style.FILL);
pressedPaint = new Paint();
pressedPaint.setColor(pressedColor);
pressedPaint.setAntiAlias(true);
pressedPaint.setStyle(Style.FILL);
Paint paintShape = new Paint();
paintShape.setStyle(Style.FILL);
paintShape.setColor(shapeColor);
paintShape.setAlpha(shapeAlpha);
if (axesData.size() > 0) {
for (int i = 0; i < axesData.size(); i++) {
if (i < axesData.size() - 1) {
// 画折线
canvas.drawLine(
axesData.get(i).X,
axesData.get(i).Y,
axesData.get(i + 1).X,
axesData.get(i + 1).Y,
paintChart);
if (isShapeShow) {
// 画阴影
Path path = new Path();
path.moveTo(axesData.get(i).X, height - bottomPadding - xTextHeight);
path.lineTo(axesData.get(i).X, axesData.get(i).Y + chartLineSize / 2);
path.lineTo(axesData.get(i + 1).X, axesData.get(i + 1).Y + chartLineSize / 2);
path.lineTo(axesData.get(i + 1).X, height - bottomPadding - xTextHeight);
canvas.drawPath(path, paintShape);
}
}
// 画网格竖线
// canvas.drawLine(axesData.get(i).X, height - bottomPadding - xTextHeight,
// axesData.get(i).X, topPadding + topTextHeight, paintGrid);
// 写X轴坐标的刻度值
if (!TextUtils.isEmpty(axesData.get(i).getxText())) {
setTextSizeForWidth(
paintBottomText, spaceXLength - 10, axesData.get(i).getxText()); // 10为相邻日期文字间隔
canvas.drawText(
axesData.get(i).getxText(),
axesData.get(i).X,
height - bottomPadding - xTextHeight / 2,
paintBottomText);
}
// 写顶部的刻度值
if (!TextUtils.isEmpty(axesData.get(i).getTopText())) {
// 取消了顶部隔年显示的数据
// canvas.drawText(axesData.get(i).getTopText(), axesData.get(i).X, topPadding,
// paintTopText);
}
// 画数据点
if (pointBitmap == null) {
canvas.drawCircle(axesData.get(i).X, axesData.get(i).Y, pointSize + 1, paintChart);
canvas.drawCircle(axesData.get(i).X, axesData.get(i).Y, pointSize, paintPoint);
} else {
Matrix matrix = new Matrix();
canvas.drawBitmap(pointBitmap, matrix, paintPoint);
}
}
// 画最后一个数据的网格竖线
// canvas.drawLine(axesData.get(axesData.size() - 1).X, height - bottomPadding - xTextHeight,
// axesData.get(axesData.size() - 1).X,
// topPadding + topTextHeight, paintGrid);
// 写X轴坐标的最后一个值的刻度值
/*
* canvas.drawText(axesData.get(axesData.size() - 1).X + "",
* axesData.get(axesData.size() - 1).X, height - bottomPadding -
* xTextHeight / 2, paintBottomText);
*/
// 写顶部的最后一个刻度值
// canvas.drawText("2014", axesData.get(axesData.size() - 1).X,
// topPadding, paintTopText);
// 画数最后一个据点
if (pointBitmap == null) {
// canvas.drawCircle(axesData.get(axesData.size() - 1).X,
// axesData.get(axesData.size() - 1).Y, pointSize + 1,
// paintChart);
// canvas.drawCircle(axesData.get(axesData.size() - 1).X,
// axesData.get(axesData.size() - 1).Y, pointSize, paintPoint);
} else {
Matrix matrix = new Matrix();
canvas.drawBitmap(pointBitmap, matrix, paintPoint);
}
}
if (currentPressedPoint != null) {
// canvas.drawCircle(currentPressedPoint.X, currentPressedPoint.Y, pointSize, pressedPaint);
}
}
@Override
protected void onDraw(Canvas canvas) {
float ringWidth = textHeight + 4;
int height = getMeasuredHeight();
int width = getMeasuredWidth();
int px = width / 2;
int py = height / 2;
Point center = new Point(px, py);
int radius = Math.min(px, py) - 2;
RectF boundingBox =
new RectF(center.x - radius, center.y - radius, center.x + radius, center.y + radius);
RectF innerBoundingBox =
new RectF(
center.x - radius + ringWidth,
center.y - radius + ringWidth,
center.x + radius - ringWidth,
center.y + radius - ringWidth);
float innerRadius = innerBoundingBox.height() / 2;
RadialGradient borderGradient =
new RadialGradient(
px, py, radius, borderGradientColors, borderGradientPositions, TileMode.CLAMP);
Paint pgb = new Paint();
pgb.setShader(borderGradient);
Path outerRingPath = new Path();
outerRingPath.addOval(boundingBox, Direction.CW);
canvas.drawPath(outerRingPath, pgb);
LinearGradient skyShader =
new LinearGradient(
center.x,
innerBoundingBox.top,
center.x,
innerBoundingBox.bottom,
skyHorizonColorFrom,
skyHorizonColorTo,
TileMode.CLAMP);
Paint skyPaint = new Paint();
skyPaint.setShader(skyShader);
LinearGradient groundShader =
new LinearGradient(
center.x,
innerBoundingBox.top,
center.x,
innerBoundingBox.bottom,
groundHorizonColorFrom,
groundHorizonColorTo,
TileMode.CLAMP);
Paint groundPaint = new Paint();
groundPaint.setShader(groundShader);
float tiltDegree = pitch;
while (tiltDegree > 90 || tiltDegree < -90) {
if (tiltDegree > 90) tiltDegree = -90 + (tiltDegree - 90);
if (tiltDegree < -90) tiltDegree = 90 - (tiltDegree + 90);
}
float rollDegree = roll;
while (rollDegree > 180 || rollDegree < -180) {
if (rollDegree > 180) rollDegree = -180 + (rollDegree - 180);
if (rollDegree < -180) rollDegree = 180 - (rollDegree + 180);
}
Path skyPath = new Path();
skyPath.addArc(innerBoundingBox, -rollDegree, (180 + (2 * rollDegree)));
canvas.rotate(-tiltDegree, px, py);
canvas.drawOval(innerBoundingBox, groundPaint);
canvas.drawPath(skyPath, skyPaint);
canvas.drawPath(skyPath, markerPaint);
int markWidth = radius / 3;
int startX = center.x - markWidth;
int endX = center.x + markWidth;
Log.d("PAARV ", "Roll " + String.valueOf(rollDegree));
Log.d("PAARV ", "Pitch " + String.valueOf(tiltDegree));
double h = innerRadius * Math.cos(Math.toRadians(90 - tiltDegree));
double justTiltX = center.x - h;
float pxPerDegree = (innerBoundingBox.height() / 2) / 45f;
for (int i = 90; i >= -90; i -= 10) {
double ypos = justTiltX + i * pxPerDegree;
if ((ypos < (innerBoundingBox.top + textHeight))
|| (ypos > innerBoundingBox.bottom - textHeight)) continue;
canvas.drawLine(startX, (float) ypos, endX, (float) ypos, markerPaint);
int displayPos = (int) (tiltDegree - i);
String displayString = String.valueOf(displayPos);
float stringSizeWidth = textPaint.measureText(displayString);
canvas.drawText(
displayString, (int) (center.x - stringSizeWidth / 2), (int) (ypos) + 1, textPaint);
}
markerPaint.setStrokeWidth(2);
canvas.drawLine(
center.x - radius / 2,
(float) justTiltX,
center.x + radius / 2,
(float) justTiltX,
markerPaint);
markerPaint.setStrokeWidth(1);
Path rollArrow = new Path();
rollArrow.moveTo(center.x - 3, (int) innerBoundingBox.top + 14);
rollArrow.lineTo(center.x, (int) innerBoundingBox.top + 10);
rollArrow.moveTo(center.x + 3, innerBoundingBox.top + 14);
rollArrow.lineTo(center.x, innerBoundingBox.top + 10);
canvas.drawPath(rollArrow, markerPaint);
String rollText = String.valueOf(rollDegree);
double rollTextWidth = textPaint.measureText(rollText);
canvas.drawText(
rollText,
(float) (center.x - rollTextWidth / 2),
innerBoundingBox.top + textHeight + 2,
textPaint);
canvas.restore();
canvas.save();
canvas.rotate(180, center.x, center.y);
for (int i = -180; i < 180; i += 10) {
if (i % 30 == 0) {
String rollString = String.valueOf(i * -1);
float rollStringWidth = textPaint.measureText(rollString);
PointF rollStringCenter =
new PointF(center.x - rollStringWidth / 2, innerBoundingBox.top + 1 + textHeight);
canvas.drawText(rollString, rollStringCenter.x, rollStringCenter.y, textPaint);
} else {
canvas.drawLine(
center.x,
(int) innerBoundingBox.top,
center.x,
(int) innerBoundingBox.top + 5,
markerPaint);
}
canvas.rotate(10, center.x, center.y);
}
canvas.restore();
canvas.save();
canvas.rotate(-1 * (bearing), px, py);
double increment = 22.5;
for (double i = 0; i < 360; i += increment) {
CompassDirection cd = CompassDirection.values()[(int) (i / 22.5)];
String headString = cd.toString();
float headStringWidth = textPaint.measureText(headString);
PointF headStringCenter =
new PointF(center.x - headStringWidth / 2, boundingBox.top + 1 + textHeight);
if (i % increment == 0)
canvas.drawText(headString, headStringCenter.x, headStringCenter.y, textPaint);
else
canvas.drawLine(
center.x, (int) boundingBox.top, center.x, (int) boundingBox.top + 3, markerPaint);
canvas.rotate((int) increment, center.x, center.y);
}
canvas.restore();
RadialGradient glassShader =
new RadialGradient(
px, py, (int) innerRadius, glassGradientColors, glassGradientPositions, TileMode.CLAMP);
Paint glassPaint = new Paint();
glassPaint.setShader(glassShader);
canvas.drawOval(innerBoundingBox, glassPaint);
canvas.drawOval(boundingBox, circlePaint);
circlePaint.setStrokeWidth(2);
canvas.drawOval(innerBoundingBox, circlePaint);
canvas.restore();
}
/**
* 自定义的方法,简单绘制一些基本图形
*
* @param mCanvas 把图形画在mCanvas上
*/
public void canvasMethod(Canvas mCanvas) {
// 创建对应坐标的矩形区域
RectF mArc = new RectF(mX, mY - 70, mX + 50, mY - 20);
// 画填充弧,在矩形区域内,从弧的最右边开始,画270度,然后再通过连接圆心来填充
mCanvas.drawArc(mArc, 0, 270, true, mPaint);
// 获得icon的Bitmap对象
Bitmap mBitmap = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888);
// 画图片
mCanvas.drawBitmap(mBitmap, mX, mY, mPaint);
// 画圆,(x轴,y轴,半径,画笔)
mCanvas.drawCircle(mX + 10, mY + 60, 10, mPaint);
// 画一条线,(起点横坐标,起点纵坐标,终点横坐标,终点纵坐标,画笔)
mCanvas.drawLine(mX, mY + 75, mX + 20, mY + 75, mPaint);
// 画多条线,(坐标数组,画笔)坐标数组里每四个值构成一条线
mCanvas.drawLines(
new float[] {mX + 50, mY + 45, mX + 50, mY + 75, mX + 60, mY + 45, mX + 60, mY + 75},
mPaint);
// 创建对应矩形区域
RectF mOval = new RectF(mX, mY + 80, mX + 60, mY + 110);
// 画椭圆
mCanvas.drawOval(mOval, mPaint);
/*
* Paint qPaint = new Paint(); qPaint.setColor(Color.RED);
* mCanvas.drawPaint(qPaint);
*/
// 重置Path里的所有路径
mPath.reset();
// 设置Path的起点
mPath.moveTo(mX, mY + 120);
// 第二个点
mPath.lineTo(screenW - 10, mY + 120);
// 第三个点
mPath.lineTo(screenW - 10, mY + 150);
// 画出路径,这里画的是三角形
mCanvas.drawPath(mPath, mPaint);
// 重置Path里的所有路径
qPath.reset();
// 设置Path的起点
qPath.moveTo(qStartX, qStartY);
// 设置贝塞尔曲线的控制点坐标和终点坐标
qPath.quadTo(qControlX, qCOntrolY, qEndX, qEndY);
// 画出贝塞尔曲线
mCanvas.drawPath(qPath, qPaint);
// 画点
mCanvas.drawPoint(mX, mY + 155, qPaint);
// 画多个点,坐标数组每两个值代表一个点的坐标
mCanvas.drawPoints(new float[] {mX, mY + 160, mX + 5, mY + 160, mX + 5, mY + 160}, qPaint);
// 画矩形
mCanvas.drawRect(mX, mY + 170, mX + 100, mY + 220, mPaint);
// 设置矩形区域
RectF mRect = new RectF(mX, mY + 230, mX + 100, mY + 260);
// 画圆角矩形,这个方法的第二第三个参数在后面有图讲解
mCanvas.drawRoundRect(mRect, 10, 10, mPaint);
// 画文本
mCanvas.drawText("drawText", mX, mY + 290, mPaint);
// 画文本,数组里每两个值代表文本的一个字符的坐标，数组的坐标可以比字符串里的字符多，但不可以少
mCanvas.drawPosText(
"哈哈你好",
new float[] {mX, mY + 310, mX + 20, mY + 310, mX + 40, mY + 310, mX + 60, mY + 310},
mPaint);
// 重置Path
tPath.reset();
// 添加一个圆形路径,坐标,半径,方向(顺时针还是逆时针)
tPath.addCircle(mX + 10, mY + 340, 10, Path.Direction.CW);
// 画出路径
mCanvas.drawPath(tPath, qPaint);
// 把文本画在路径上,但不会画出路径
mCanvas.drawTextOnPath("draw", tPath, 30, 0, mPaint);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
// draw border
mPlotPaint.setStyle(Paint.Style.STROKE);
mPlotPaint.setColor(Color.BLACK);
canvas.drawRect(mPlotBounds, mPlotPaint);
// draw grid
mPlotPaint.setColor(gridColor);
// x grid
if (xTicks != null) {
for (float tick : xTicks) {
int x = calcX(tick);
canvas.drawLine(x, mPlotBounds.bottom, x, mPlotBounds.top, mPlotPaint);
}
}
if (yTicks != null) {
for (float tick : yTicks) {
int y = calcY(tick);
canvas.drawLine(mPlotBounds.left, y, mPlotBounds.right, y, mPlotPaint);
}
}
/* *************************
* draw the data
***************************/
for (Seria s : mData) {
stroke(s, canvas);
}
// draw rectangles that hide out of bounds lines
mPlotPaint.setStyle(Style.FILL);
mPlotPaint.setColor(Color.WHITE);
// left
canvas.drawRect(0, 0, mPlotBounds.left, this.getBottom(), mPlotPaint);
// bottom
canvas.drawRect(0, mPlotBounds.bottom + 1, this.getRight(), this.getBottom(), mPlotPaint);
// right
canvas.drawRect(mPlotBounds.right + 1, 0, this.getRight(), this.getBottom(), mPlotPaint);
// top
canvas.drawRect(0, 0, this.getRight(), mPlotBounds.top, mPlotPaint);
// x ticks
mPlotPaint.setStyle(Paint.Style.STROKE);
mPlotPaint.setTextAlign(Align.CENTER);
mPlotPaint.setTextSize(xTickTextHeight);
mPlotPaint.setColor(xTickColor);
if (xTicks != null) {
for (float tick : xTicks) {
textFigure(
xTickFormat.format(tick).toString(),
calcX(tick),
mPlotBounds.bottom + xTickTextHeight,
canvas);
}
}
mPlotPaint.setTextSize(labelTextHeight);
mPlotPaint.setTextAlign(Align.RIGHT);
if (labelX != null) {
textFigure(labelX, mPlotBounds.right, mPlotBounds.bottom + axisXSpacing, canvas);
}
// y ticks
mPlotPaint.setTextAlign(Align.CENTER);
mPlotPaint.setTextSize(yTickTextHeight);
mPlotPaint.setColor(yTickColor);
if (yTicks != null) {
for (float tick : yTicks) {
textFigure(
yTickFormat.format(tick).toString(),
mPlotBounds.left - yTickTextHeight,
calcY(tick),
90,
canvas);
}
}
mPlotPaint.setTextSize(labelTextHeight);
mPlotPaint.setTextAlign(Align.RIGHT);
if (labelX != null) {
textFigure(labelX, mPlotBounds.right, mPlotBounds.bottom + axisXSpacing, canvas);
}
mPlotPaint.setTextAlign(Align.LEFT);
if (labelY != null) {
textFigure(labelY, mPlotBounds.left - axisYSpacing, mPlotBounds.top, 90, canvas);
}
}
@Override
protected void onDraw(Canvas canvas) {
canvas.drawLine(mTextX, mPointerY, mPointerX, mPointerY, mTextPaint);
canvas.drawCircle(mPointerX, mPointerY, mPointerRadius, mTextPaint);
}