// ============================================================================== public final int[] renderGlyph( char glyph, Paint paint, android.graphics.Matrix matrix, Rect bounds) { Path p = new Path(); paint.getTextPath(String.valueOf(glyph), 0, 1, 0.0f, 0.0f, p); RectF boundsF = new RectF(); p.computeBounds(boundsF, true); matrix.mapRect(boundsF); boundsF.roundOut(bounds); bounds.left--; bounds.right++; final int w = bounds.width(); final int h = bounds.height(); Bitmap bm = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888); Canvas c = new Canvas(bm); matrix.postTranslate(-bounds.left, -bounds.top); c.setMatrix(matrix); c.drawPath(p, paint); final int sizeNeeded = w * h; if (cachedRenderArray.length < sizeNeeded) cachedRenderArray = new int[sizeNeeded]; bm.getPixels(cachedRenderArray, 0, w, 0, 0, w, h); bm.recycle(); return cachedRenderArray; }
private void drawFooter(Canvas canvas) { final ZLView view = ZLApplication.Instance().getCurrentView(); final ZLView.FooterArea footer = view.getFooterArea(); if (footer == null) { myFooterBitmap = null; return; } if (myFooterBitmap != null && (myFooterBitmap.getWidth() != getWidth() || myFooterBitmap.getHeight() != footer.getHeight())) { myFooterBitmap = null; } if (myFooterBitmap == null) { myFooterBitmap = Bitmap.createBitmap(getWidth(), footer.getHeight(), Bitmap.Config.RGB_565); } final ZLAndroidPaintContext context = new ZLAndroidPaintContext( new Canvas(myFooterBitmap), getWidth(), footer.getHeight(), view.isScrollbarShown() ? getVerticalScrollbarWidth() : 0); footer.paint(context); canvas.drawBitmap(myFooterBitmap, 0, getHeight() - footer.getHeight(), myPaint); }
/** * 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 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(); }