/**
* 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);
}
public void draw() {
Bitmap bitmap = Bitmap.createBitmap(200, 200, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
RectF rect = new RectF(8, 8, 192, 192);
Paint p = new Paint();
p.setAntiAlias(true);
p.setStyle(Paint.Style.STROKE);
p.setColor(ColS);
p.setStrokeWidth(16);
int S = 162;
int H = 300;
// S
canvas.drawArc(rect, -90, S, false, p);
p.setStyle(Paint.Style.FILL);
p.setColor(ColM);
H -= 90;
canvas.drawCircle(100, 100, 72, p);
p.setColor(ColH);
p.setStrokeWidth(2);
float sx, sy;
sx = (float) (72 * Math.cos(Math.PI * H / 180));
sy = (float) (72 * Math.sin(Math.PI * H / 180));
canvas.drawLine(100, 100, sx + 100, sy + 100, p);
ImageView clokImg;
clokImg = (ImageView) findViewById(R.id.clokImage);
clokImg.setImageBitmap(bitmap);
// Hour picker
Bitmap ColPickBmp = Bitmap.createBitmap(80, 50, Bitmap.Config.ARGB_8888);
Canvas ColPickCanvas = new Canvas(ColPickBmp);
ImageView colPickImg = (ImageView) findViewById(R.id.colorHou);
rect = new RectF(0, 0, 80, 50);
p = new Paint();
p.setAntiAlias(true);
p.setStyle(Paint.Style.FILL);
p.setColor(ColH);
ColPickCanvas.drawRect(rect, p);
colPickImg.setImageBitmap(ColPickBmp);
// Minute picker
ColPickBmp = Bitmap.createBitmap(80, 50, Bitmap.Config.ARGB_8888);
ColPickCanvas = new Canvas(ColPickBmp);
colPickImg = (ImageView) findViewById(R.id.colorMin);
rect = new RectF(0, 0, 80, 50);
p = new Paint();
p.setAntiAlias(true);
p.setStyle(Paint.Style.FILL);
p.setColor(ColM);
ColPickCanvas.drawRect(rect, p);
colPickImg.setImageBitmap(ColPickBmp);
// Second picker
ColPickBmp = Bitmap.createBitmap(80, 50, Bitmap.Config.ARGB_8888);
ColPickCanvas = new Canvas(ColPickBmp);
colPickImg = (ImageView) findViewById(R.id.colorSec);
rect = new RectF(0, 0, 80, 50);
p = new Paint();
p.setAntiAlias(true);
p.setStyle(Paint.Style.FILL);
p.setColor(ColS);
ColPickCanvas.drawRect(rect, p);
colPickImg.setImageBitmap(ColPickBmp);
}
public void run() {
int x, y;
Bitmap locTile;
Canvas canvas;
float useLon, useLat, useLonMax, useLatMax;
System.gc();
if ((useOverlay.tileX == 0) && (useOverlay.tileY == 0)) return;
mapThreadRunning = true;
try {
if (locMap == null)
locMap = Bitmap.createBitmap(tileWidth * 256, tileHeight * 256, Bitmap.Config.ARGB_8888);
} catch (OutOfMemoryError oome) {
return;
}
locMap.eraseColor(Color.BLACK);
canvas = new Canvas(locMap);
useLon =
(GeoUtils.tilex2long(useOverlay.tileX, useOverlay.m_zoom)
+ GeoUtils.tilex2long(useOverlay.tileX + 1, useOverlay.m_zoom))
/ 2.0f;
useLat =
(GeoUtils.tiley2lat(useOverlay.tileY, useOverlay.m_zoom)
+ GeoUtils.tiley2lat(useOverlay.tileY + 1, useOverlay.m_zoom))
/ 2.0f;
while (mScaleFactor >= 2.0) {
mScaleFactor /= 2.0f;
useOverlay.m_zoom++;
if (useOverlay.m_zoom > 17) {
useOverlay.m_zoom = 17;
imgOffsetX -= (scrWidth - (scrWidth * 2.0)) / 2.0;
imgOffsetY -= (scrHeight - (scrHeight * 2.0)) / 2.0;
}
}
while (mScaleFactor <= 0.5) {
mScaleFactor *= 2.0f;
useOverlay.m_zoom--;
if (useOverlay.m_zoom < 3) {
useOverlay.m_zoom = 3;
imgOffsetX -= (scrWidth - (scrWidth * 2.0)) / 2.0;
imgOffsetY -= (scrHeight - (scrHeight * 2.0)) / 2.0;
}
}
mScaleFactor = 1.0f;
/* if ((wasScaleOp) && (lonCenter!=0.0f) && (latCenter!=0.0f))
{
tileX=GeoUtils.long2tilex(lonCenter,m_zoom);
tileY=GeoUtils.lat2tiley(latCenter,m_zoom);
tileX-=(scrWidth / 256);
tileY-=(scrWidth / 256);
}
else*/
{
useOverlay.tileX = GeoUtils.long2tilex(useLon, useOverlay.m_zoom);
useOverlay.tileY = GeoUtils.lat2tiley(useLat, useOverlay.m_zoom);
}
useLon = GeoUtils.tilex2long(useOverlay.tileX - 1, useOverlay.m_zoom);
useLat = GeoUtils.tiley2lat(useOverlay.tileY - 1, useOverlay.m_zoom);
useLonMax = GeoUtils.tilex2long(useOverlay.tileX + tileWidth + 1, useOverlay.m_zoom);
useLatMax = GeoUtils.tiley2lat(useOverlay.tileY + tileHeight + 1, useOverlay.m_zoom);
/* if (imgOffsetX>scrWidth)
{
imgOffsetX=scrWidth/2;
}
if (imgOffsetX<=-scrWidth)
{
imgOffsetX=-scrWidth/2;
}
if (imgOffsetY>scrHeight)
{
imgOffsetY=scrHeight/2;
}
if (imgOffsetY<=-scrHeight)
{
imgOffsetY=-scrHeight/2;
}*/
while (imgOffsetX > 0) {
imgOffsetX -= 256.0f;
useOverlay.tileX--;
}
while (imgOffsetX <= -256.0) {
imgOffsetX += 256.0f;
useOverlay.tileX++;
}
while (imgOffsetY > 0) {
imgOffsetY -= 256.0f;
useOverlay.tileY--;
}
while (imgOffsetY <= -256.0) {
imgOffsetY += 256.0f;
useOverlay.tileY++;
}
// calculate lat/lon of screen center point
/* {
int useTileX=tileX,useTileY=tileY;
x=(int)((scrWidth/2.0f)+imgOffsetX);
y=(int)((scrHeight/2.0f)+imgOffsetY);
useTileX+=(x / 256);
x=x % 256;
useTileY+=(y / 256);
y=y % 256;
float tileLon1=GeoUtils.tilex2long(useTileX,m_zoom);
float tileLat1=GeoUtils.tiley2lat(useTileY,m_zoom);
float tileLon2=GeoUtils.tilex2long(useTileX+1,m_zoom);
float tileLat2=GeoUtils.tiley2lat(useTileY+1,m_zoom);
lonCenter=(((tileLon2-tileLon1)/256.0f)*x)+tileLon1;
latCenter=(((tileLat2-tileLat1)/256.0f)*y)+tileLat1;
}*/
matrix.setTranslate(imgOffsetX, imgOffsetY);
breakMapThread = false;
mapThreadRunning = false;
for (x = 0; x < tileWidth; x++)
for (y = 0; y < tileHeight; y++) {
if (breakMapThread) return;
locTile =
geoUtils.loadMapTile(
getContext(),
useOverlay.tileX + x,
useOverlay.tileY + y,
useOverlay.m_zoom,
allowNetAccess);
if (locTile != null) canvas.drawBitmap(locTile, x * 256, y * 256, null);
postInvalidate();
}
useOverlay.doDraw(canvas, useLon, useLonMax, useLat, useLatMax, locMap);
postInvalidate();
System.gc();
}
