2D学习之Bitmap
Canvas canvas =new Canvas();
Paint paint =new Paint();
canvas.drawColor(Color.BLACK);
//-------绘制位图
canvas.drawBitmap(bitmap,0,0, paint);
//-------旋转位图(方式1)
canvas.save();
canvas.rotate(30, bitmap.getWidth() /2, bitmap.getHeight() /2);
canvas.drawBitmap(bitmap,0,0, paint);
canvas.restore();
canvas.drawBitmap(bitmap,100,0, paint);
//-------旋转位图(方式2)
Matrix matrix =new Matrix();
matrix.postRotate(30, bitmap.getWidth() /2, bitmap.getHeight() /2);
canvas.drawBitmap(bitmap, matrix, paint);
//-------平移位图(方式1)
canvas.save();
canvas.translate(10,10);
canvas.drawBitmap(bitmap,0,0, paint);
canvas.restore();
//-------平移位图(方式2)
Matrix matrixT =new Matrix();
matrixT.postTranslate(10,10);
canvas.drawBitmap(bitmap, matrixT, paint);
//-------缩放位图(方式1)
canvas.save();
canvas.scale(2f,2f,50+ bitmap.getWidth(),50+ bitmap.getHeight());
canvas.drawBitmap(bitmap,50,50, paint);
canvas.restore();
canvas.drawBitmap(bitmap,50,50, paint);
//-------缩放位图(方式2)
Matrix matrixS =new Matrix();
matrixS.postTranslate(50,50);
matrixS.postScale(2f,2f,50+ bitmap.getWidth(),50+ bitmap.getHeight());
canvas.drawBitmap(bitmap, matrixS, paint);
canvas.drawBitmap(bitmap,50,50, paint);
//-------镜像翻转位图(方式1)
//X轴镜像
canvas.drawBitmap(bitmap,0,0, paint);
canvas.save();
canvas.scale(-1,1,100+ bitmap.getWidth() /2,100+ bitmap.getHeight() /2);
canvas.drawBitmap(bitmap,100,100, paint);
canvas.restore();
//Y轴镜像
canvas.drawBitmap(bitmap,0,0, paint);
canvas.save();
canvas.scale(1, -1,100+ bitmap.getWidth() /2,100+ bitmap.getHeight() /2);
canvas.drawBitmap(bitmap,100,100, paint);
canvas.restore();
//-------镜像翻转位图(方式2)
//X轴镜像
canvas.drawBitmap(bitmap,0,0, paint);
Matrix matrixX =new Matrix();
matrixX.postTranslate(100,100);
matrixX.postScale(-1,1,100+ bitmap.getWidth() /2,100+ bitmap.getHeight() /2);
canvas.drawBitmap(bitmap, matrixX, paint);
//Y轴镜像
canvas.drawBitmap(bitmap,0,0, paint);
Matrix matrixY =new Matrix();
matrixY.postTranslate(100,100);
matrixY.postScale(1, -1,100+ bitmap.getWidth() /2,100+ bitmap.getHeight() /2);
canvas.drawBitmap(bitmap, matrixY, paint);