《通信業(yè)務(wù)開發(fā)》課程Matrix矩陣Matrix矩陣PART21-52D繪圖功能特性屬性方法實例演示View畫框，裝裱圖畫，展示在Activity中1234Canvas畫布，提供繪圖方法Paint畫筆，可設(shè)置粗細、顏色、風格樣式…Color顏料色彩根據(jù)ARGB調(diào)配色彩，供畫筆使用5BitmapPathDrawableMatrix……圖片、圖形、路徑、矩陣等其他工具…2D繪圖功能特性示例android.graphics.Matrix矩陣，實現(xiàn)圖片平移、旋轉(zhuǎn)、縮放、傾斜等變換通過數(shù)學矩陣實現(xiàn)，也可使用自定義方法完成Matrix是一個3x3矩陣，圖片處理基本類型：Translate平移變換Scale縮放變換Rotate旋轉(zhuǎn)變換Skew錯切變換矩陣運算：加法減法乘法(圖像處理常用)…特性No.方法描述1preScalepreTranslatepreRotatepreSkew矩陣前乘2setScalesetTranslatesetRotatesetSkew矩陣清空后重設(shè)3postScalepostTranslatepostRotatepostSkew矩陣后乘屬性方法矩陣范例為60度時的矩陣實例演示publicclassImageAcextendsActivityimplementsOnClickListener{ImageViewsrc,dst;Buttonmirror,flip,saturation,bright,contrast;@OverridepublicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.imageac);src=(ImageView)findViewById(R.id.imagesrc);dst=(ImageView)findViewById(R.id.imagedst);mirror=(Button)findViewById(R.id.mirror);flip=(Button)findViewById(R.id.flip);saturation=(Button)findViewById(R.id.saturation);bright=(Button)findViewById(R.id.bright);contrast=(Button)findViewById(R.id.contrast);mirror.setOnClickListener(this);flip.setOnClickListener(this);saturation.setOnClickListener(this);bright.setOnClickListener(this);contrast.setOnClickListener(this);}publicvoidonClick(Viewv){BitmapdstImage=null;switch(v.getId()){caseR.id.mirror:dstImage=mirrorBitmap();break;caseR.id.flip:dstImage=flipBitmap();break;caseR.id.saturation:dstImage=saturationBitmap();break;caseR.id.bright:dstImage=brightBitmap();break;caseR.id.contrast:dstImage=constrastBitmap();break;}dst.setImageBitmap(dstImage);}}Activity事件響應(yīng)1實例演示//得到鏡像后的圖片publicBitmapmirrorBitmap(){Bitmapsrc=BitmapFactory.decodeResource(getResources(),R.drawable.ava);Bitmapcopy=Bitmap.createBitmap(src.getWidth(),src.getHeight(),src.getConfig());Canvascanvas=newCanvas(copy);Paintpaint=newPaint();Matrixm=newMatrix();m.setScale(-1,1);m.postTranslate(src.getWidth(),0);canvas.drawBitmap(src,m,paint);returncopy;}鏡像矩陣變化2實例演示//得到倒影后的圖片publicBitmapflipBitmap(){Bitmapsrc=BitmapFactory.decodeResource(getResources(),R.drawable.ava);Bitmapflip=Bitmap.createBitmap(src.getWidth(),src.getHeight(),src.getConfig());Canvascanvas=newCanvas(flip);Paintpaint=newPaint();Matrixm=newMatrix();m.setScale(1,-1);m.postTranslate(0,src.getHeight());canvas.drawBitmap(src,m,paint);returnflip;}倒影矩陣變換3實例演示//得到RGBA變化后的圖片publicBitmapconstrastBitmap(){Bitmapsrc=BitmapFactory.decodeResource(getResources(),R.drawable.ava);Bitmapdst=Bitmap.createBitmap(src.getWidth(),src.getHeight(),src.getConfig());Canvascanvas=newCanvas(dst);Paintpaint=newPaint();

ColorMatrixm=newColorMatrix();floatr=2,g=2,b=2,a=1;m.set(newfloat[]{r,0,0,0,0,0,g,0,0,0,0,0,b,0,0,0,0,0,a,0,});ColorMatrixColorFiltercmcf=newColorMatrixColorFilter(m);paint.setColorFilter(cmcf);canvas.drawBitmap(src,0,0,paint);returndst;}RGBA矩陣變換4實例演示//得到變亮后的圖片publicBitmapbrightBitmap(){Bitmapsrc=BitmapFactory.decodeResource(getResources(),R.drawable.ava);Bitmapdst=Bitmap.createBitmap(src.getWidth(),src.getHeight(),src.getConfig());Canvascanvas=newCanvas(dst);Paintpaint=newPaint();ColorMatrixm=newColorMatrix();floatr=2,g=2,b=2,br=50;m.set(newfloat[]{r,0,0,0,br,0,g,0,0,br,0,0,b,0,br,0,0,0,1,0,});ColorMatrixColorFiltercmcf=newColorMatrixColorFilter(m);paint.setColorFilter(cmcf);canvas.drawBitmap(src,0,0,paint);returndst;}亮度變換矩陣5實例演示//得到變化飽和度后的圖片publicBitmapsaturationBitmap(){Bitmapsrc=BitmapFactory.decodeResource(getResources(),R.drawable.ava);Bitmapdst=Bitmap.createBitmap(src.getWidth(),src.getHeight(),src.getConfig());Canvascanvas=newCanvas(dst);Paintpaint=newPaint();ColorMatrixm=newColorMatrix();floatr=1,g=1,b=1,br=0;m.set(newfloat[]{