如何剪切位圖的中間區域？

Question

如何剪切位圖的中間區域？ 這是我的示例代碼：

 public void onPictureTaken(byte[] paramArrayOfByte, Camera paramCamera)

{

 FileOutputStream fileOutputStream = null;
 try {

     File saveDir = new File("/sdcard/CameraExample/");

     if (!saveDir.exists())
     {
     saveDir.mkdirs();
     }

     BitmapFactory.Options options = new BitmapFactory.Options();

     options.inSampleSize = 5;

     Bitmap myImage = BitmapFactory.decodeByteArray(paramArrayOfByte, 0,paramArrayOfByte.length, options);

     Bitmap bmpResult = Bitmap.createBitmap(myImage.getWidth(), myImage.getHeight(),Config.RGB_565);



     int length = myImage.getHeight()*myImage.getWidth();

     int[] pixels = new int[length];


     myImage.getPixels(pixels, 0, myImage.getWidth(), 0,0, myImage.getWidth(), myImage.getHeight());

     Bitmap TygolykovLOL = Bitmap.createBitmap(pixels, 0, myImage.getWidth(), myImage.getWidth(),myImage.getHeight(), Config.RGB_565);

     Paint paint = new Paint();         

     Canvas myCanvas = new Canvas(bmpResult);

     myCanvas.drawBitmap(TygolykovLOL, 0, 0, paint);





  fileOutputStream = new FileOutputStream("/sdcard/CameraExample/"  + "1ggggqqqqGj2.bmp");

     BufferedOutputStream bos = new BufferedOutputStream(fileOutputStream );


     bmpResult.compress(CompressFormat.PNG, 100, bos);

     bos.flush();
     bos.close();

Answer 1

您可能希望使用createBitmap的另一個重載 - 它具有x，y，width和height參數，您可以使用這些參數將位圖的中間部分裁剪為新的位圖。

像這樣的東西：

Bitmap cropped = Bitmap.createBitmap(sourceBitmap, 50, 50, sourceBitmap.getWidth() - 100, sourceBitmap.getHeight() - 100);

從邊緣剪出50像素的所有內容。