drawbitmap_delphi fmx DrawBitmap函数_Canvas drawBitmap不显示位图 - 腾讯云开发者社区

== null) { drawBitmap = resizeImage(bitmap, width); if (drawBitmap.getHeight() 1.5 * height) {...(); srcRect.bottom = drawBitmap.getHeight(); if (drawBitmap.getHeight() height) { drawBitmap = resizeImageH...(drawBitmap, height - 20); } else { float space = (height - drawBitmap.getHeight()); dstRectF.left...(drawBitmap, (width - drawBitmap.getWidth()) / 2, slideLength, paint); } /** * 设置是否需要滑动 * * @param...() - height)) { slideLength = (-1) * (drawBitmap.getHeight() - height); } postInvalidate(); break

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HenCoder Android 开发进阶：自定义 View 1-4 Canvas 对绘制的辅助

1.1 clipRect() 使用很简单，直接应用： canvas.clipRect(left, top, right, bottom); canvas.drawBitmap(bitmap, x,...canvas.save(); canvas.translate(200, 0); canvas.drawBitmap(bitmap, x, y, paint); canvas.restore...canvas.save(); canvas.translate(200, 0); canvas.drawBitmap(bitmap, x, y, paint); canvas.restore...canvas.save(); canvas.skew(0, 0.5f); canvas.drawBitmap(bitmap, x, y, paint); canvas.restore();...canvas.save(); canvas.translate(200, 0); canvas.drawBitmap(bitmap, x, y, paint); canvas.restore

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Android利用SRC_IN模式下的Xfermode实现图片倒影效果

} onDraw方法中处理 @Override protected void onDraw(Canvas canvas) { //画原图 canvas.drawBitmap...(bitmapSrc, 0, 0, mPaint); //在原图下方画目标图 canvas.drawBitmap(bitmapDst, 0, bitmapSrc.getHeight...matrix.setScale(1,-1); matrix.postTranslate(0,bitmapSrc.getHeight()*2); canvas.drawBitmap

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CanvasAPI

RectF rect, float rx, float ry, Paint paint); //画路径 void drawPath(Path path, Paint paint); //画位图 void drawBitmap...(Bitmap bitmap, float left, float top, Paint paint); void drawBitmap(Bitmap bitmap, Rect src, RectF dst..., Paint paint); void drawBitmap(Bitmap bitmap, Rect src, Rect dst, Paint paint); void drawBitmap(int[...] colors, int offset, int stride, float x, float y, int width, int height, boolean hasAlpha, void drawBitmap..., int offset, int stride, int x, int y, int width, int height, boolean hasAlpha, Paint paint); void drawBitmap

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Android开发中使用颜色矩阵改变图片颜色，透明度及亮度的方法

new ColorMatrix(); mPaint.setColorFilter(new ColorMatrixColorFilter(mColorMatrix)); //绘制原图 mCanvas.drawBitmap...0,0,1,0,0, 0,0,0,1,0, }); mPaint.setColorFilter(new ColorMatrixColorFilter(mColorMatrix)); mCanvas.drawBitmap...0,0,1,0,0, 0,0,0,1,0, }); mPaint.setColorFilter(new ColorMatrixColorFilter(mColorMatrix)); mCanvas.drawBitmap...128.0f,0,0, 0,0,0,1,0, }); mPaint.setColorFilter(new ColorMatrixColorFilter(mColorMatrix)); mCanvas.drawBitmap...0,0,0,progess/50.0f,0, }); mPaint.setColorFilter(new ColorMatrixColorFilter(mColorMatrix)); mCanvas.drawBitmap

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切换按钮-自定义控件

setMeasuredDimension()方法，参数：宽度，高度；调用背景Bitmap对象的getWidth()和getHeight() 重写onDraw()方法，传递进来Canvas对象调用Canvas对象的drawBitmap...上边点（0），Paint对象获取Paint对象，new出来调用Paint对象的setAntiAlias()，设置抗锯齿，参数：布尔值滑动按钮滑动按钮目前的位置，0，0，状态是关 canvas.drawBitmap...(bitmapBtn, 0, 0, paint); 滑动按钮的位置在，背景图的宽度-滑动按钮的宽度，0，状态是开 canvas.drawBitmap(bitmapBtn, 背景图的宽度-滑动按钮的宽度...view */ @Override protected void onDraw(Canvas canvas) { //绘制背景 canvas.drawBitmap...(bitmapBackground, 0, 0, paint); //绘制滑动按钮 canvas.drawBitmap(bitmapBtn, slideBtnLeft,

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Android自定义系列——5.Canvas图片文字绘制

1.绘制图片绘制有两种方法，drawPicture(矢量图) 和 drawBitmap(位图) (1)drawPicture 使用Picture前请关闭硬件加速，以免引起不必要的问题！...在使用Picture之前请关闭硬件加速，以免引起不必要的问题 (2)drawBitmap 通过BitmapFactory从不同位置获取Bitmap: 1.资源文件(drawable/mipmap/raw...绘制Bitmap：依照惯例先预览一下drawBitmap的常用方法： // 第一种 public void drawBitmap (Bitmap bitmap, Matrix matrix, Paint...void drawBitmap (Bitmap bitmap, Rect src, Rect dst, Paint paint) public void drawBitmap (Bitmap bitmap...canvas.drawBitmap(bitmap,200,500,new Paint()); 第三种方法，多了两个矩形区域(src,dst) 名称作用 Rect src 指定绘制图片的区域 Rect

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android 实现在照片上绘制涂鸦的方法

OutputStream os = getContentResolver().openOutputStream(imageUri); //compress方法将图片转换成JPG或者PNG格式 drawBitmap.compress...Toast.LENGTH_LONG).show(); } catch (FileNotFoundException e) { e.printStackTrace(); } 四、擦除涂鸦笔迹实现代码如下： drawBitmap...= Bitmap.createBitmap(bmp.getWidth(), bmp.getHeight(), bmp.getConfig()); canvas = createCanvas(drawBitmap...); paint = createPaint(); canvas.drawBitmap(bmp, 0, 0, paint); iv_drawpicture.setImageBitmap(drawBitmap

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Android画图之抗锯齿博客分类： Android小技巧 Android

R.drawable.show); } @Override public void dispatchDraw(Canvas canvas) { canvas.translate(100, 0); canvas.drawBitmap...(bmp, matrix, null); canvas.translate(0, 250); canvas.drawBitmap(bmp, matrix, mPaint); canvas.setDrawFilter...(pfd); canvas.translate(0, 250); canvas.drawBitmap(bmp, matrix, null); } } 下图是效果： ?

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自定义圆角和园边的实现

new PorterDuffXfermode(PorterDuff.Mode.SRC_IN)); /** * 绘制图片 */ canvas.drawBitmap...下面有一张PorterDuff.Mode的16中效果图，咱们的只是其一：源码咱们只关心谁先谁后绘制的 canvas.translate(x, y); canvas.drawBitmap...(mDstB, 0, 0, paint); paint.setXfermode(sModes[i]); canvas.drawBitmap...(createCircleImage(mSrc, min), 0, 0, null); break; case TYPE_ROUND: canvas.drawBitmap...new PorterDuffXfermode(PorterDuff.Mode.SRC_IN)); /** * 绘制图片 */ canvas.drawBitmap

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Android开发实现图片平移、缩放、倒影及旋转功能的方法

matrix = new Matrix(); matrix.setRotate(90, bm.getWidth()/2, bm.getHeight()/2); 4）把改变后图片设置到 canvas.drawBitmap...2, bm.getHeight()/2); matrix.setTranslate(20, 20); matrix.postTranslate(20, 20); canvas.drawBitmap...* 1.0f, 0, 0,//x 0, 1.0f, 0,//y 0, 0, 1.0f//z }); canvas.drawBitmap...20); //镜子效果 matrix.setScale(1, -1); matrix.postTranslate(0, bm.getHeight()); canvas.drawBitmap...Matrix matrix = new Matrix(); matrix.setRotate(90, bm.getWidth()/2, bm.getHeight()/2); canvas.drawBitmap

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Android 实现图片生成卷角和圆角缩略图的方法

使用方法如下： Paint paint = new Paint(); paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.XXX); canvas.drawBitmap...radius, radius, paint); paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN)); canvas.drawBitmap...R.drawable.border)).getBitmap(); Paint paint = new Paint(); paint.setAntiAlias(true); // 先贴掩码图. canvas.drawBitmap...paint); // 再用 SrcIn 的模式贴缩略图. paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN)); canvas.drawBitmap...(srcBmp, rc, rc, paint); // 先取消 Xfermode. paint.setXfermode(null); // 再贴边框卷角图. canvas.drawBitmap(borderBmp

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Android实现合并生成分享图片功能

headHeight + kebiaoheight + footerheight, Bitmap.Config.ARGB_8888); Canvas cv = new Canvas(newbmp); cv.drawBitmap..., Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(ne); canvas.drawColor(Color.WHITE); cv.drawBitmap...(ne, headWidth, 0, null); } cv.drawBitmap(kebiao, 0, headHeight, null);// 在 0，headHeight坐标开始填充课表的Bitmap...cv.drawBitmap(san, 0, headHeight + kebiaoheight, null);// 在 0，headHeight + kebiaoheight坐标开始填充课表的Bitmap..., Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(ne); canvas.drawColor(Color.WHITE); cv.drawBitmap

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Android仿网易云音乐播放界面

，手机是720的宽度 canvas.rotate(Constant.Degree, 360, 170 + bitmapDiscCircular.getHeight() / 2); canvas.drawBitmap...(bitmapCircularAblum, 360 - bitmapCircularAblum.getWidth() / 2, 200, paint); canvas.drawBitmap(bitmapDisc...canvas.save(); canvas.rotate(degreeFlag, 360, 170 + bitmapDiscCircular.getHeight() / 2); canvas.drawBitmap...(bitmapCircularAblum, 360 - bitmapCircularAblum.getWidth() / 2, 200, paint); canvas.drawBitmap(bitmapDisc.../ 2, sbmp.getWidth() / 2, paint); paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN)); canvas.drawBitmap

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Android利用SRC_OUT模式下的Xfermode实现刮刮卡效果

event); } @Override protected void onDraw(Canvas canvas) { //画结果 canvas.drawBitmap...null, Canvas.ALL_SAVE_FLAG); //画DST dstCanvas.drawPath(path,pathPaint); canvas.drawBitmap...new PorterDuffXfermode(PorterDuff.Mode.SRC_OUT); mPaint.setXfermode(xfermode); canvas.drawBitmap

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Android --- 图片的特效处理

rectF, roundPX, roundPX, paint); paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN)); canvas.drawBitmap...(height + height/2), Config.ARGB_8888); Canvas canvas = new Canvas(reflectedBitmap); canvas.drawBitmap...defaultPaint = new Paint(); canvas.drawRect(0, height, width, height + reflectedGap, defaultPaint); canvas.drawBitmap...super.onCreate(savedInstanceState); setContentView(R.layout.main); drawBitmap...(); } private void drawBitmap(){ imgView1 = (ImageView)findViewById(R.id.imgView1

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Android进阶之绘制-自定义View完全掌握(四)

我们在绘制第二张图的时候是距离左边距为0，而此时我们已经计算出了开启状态需要距离左边的边距，所以，我们只需这样修改 canvas.drawBitmap(slidingBitmap,slidLeftMax...(backgroundBitmap, 0, 0, paint); canvas.drawBitmap(slidingBitmap, slideLeft, 0, paint); }...(backgroundBitmap, 0, 0, paint); canvas.drawBitmap(slidingBitmap, slideLeft, 0, paint); }...(backgroundBitmap, 0, 0, paint); canvas.drawBitmap(slidingBitmap, slideLeft, 0, paint); }...(backgroundBitmap, 0, 0, paint); canvas.drawBitmap(slidingBitmap, slideLeft, 0, paint); }

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滑动开关按钮SlideSwich

(canvas, null, null, mSwitch_off); drawBitmap(canvas, null, null, mSwitch_thumb); ... canvas.translate(mSwitch_on.getWidth() - mSwitch_thumb.getWidth(), 0); drawBitmap...SWITCH_ON : SWITCH_OFF; drawBitmap(canvas, new Rect(0, 0, mDstX, mBmpHeight), new Rect...mPaint); int count = canvas.save(); canvas.translate(mDstX, 0); drawBitmap...bitmap.getWidth(), bitmap.getHeight()) : dst); Paint paint = new Paint(); canvas.drawBitmap

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Android画图之Bitmap(一) 博客分类： Android Android

方法很简单，在 View 里面，重载 onDraw(Canvas canvas) 方法，然后用 canvas.drawBitmap() 方法，将其画在屏幕上。...canvas.drawBitmap(mBitmap, 0, 0, null); } } 结果： ? 原图： ? 虽然这仅仅只是第一步，但是很鼓舞人心呢，呵呵。...canvas.drawBitmap(mBitmap, 0, 0, null); } } 显示结果： ? 下面一篇将介绍对Bitmap的一些操作。

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仿uc下部弹出菜单

/** * 以一个Bitmap为画布，画上一个Bitmap * @param canvasBitmap 作为画布的Bitmap * @param drawBitmap...(Bitmap canvasBitmap, Bitmap drawBitmap, int top, int left) { Canvas localCanvas...= new Canvas(canvasBitmap);//以canvasBitmap生成画布 localCanvas.drawBitmap(drawBitmap, left,...top, null);//在画布上移left和top左标开始绘制drawBitmap localCanvas.save(Canvas.ALL_SAVE_FLAG);//保存 ...localCanvas.restore(); drawBitmap.recycle();//释放掉drawBitmap，防止内存泄漏 } 加载资源文件中的图片为

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Android仿微博加载长图滚动查看效果

HenCoder Android 开发进阶：自定义 View 1-4 Canvas 对绘制的辅助

Android利用SRC_IN模式下的Xfermode实现图片倒影效果

CanvasAPI

Android开发中使用颜色矩阵改变图片颜色，透明度及亮度的方法

切换按钮-自定义控件

Android自定义系列——5.Canvas图片文字绘制

android 实现在照片上绘制涂鸦的方法

Android画图之抗锯齿博客分类： Android小技巧 Android

自定义圆角和园边的实现

Android开发实现图片平移、缩放、倒影及旋转功能的方法

Android 实现图片生成卷角和圆角缩略图的方法

Android实现合并生成分享图片功能

Android仿网易云音乐播放界面

Android利用SRC_OUT模式下的Xfermode实现刮刮卡效果

Android --- 图片的特效处理

Android进阶之绘制-自定义View完全掌握(四)

滑动开关按钮SlideSwich

Android画图之Bitmap(一) 博客分类： Android Android

仿uc下部弹出菜单

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