Flip and rotate images in Android

Image flip and Rotation

I tried to flip the image, but I still couldn't find a method. Find only one method to flip the image on the Internet
Resources res = This. getcontext (). getresources ();

IMG = bitmapfactory. decoderesource (Res, R. drawable. slogo );

Matrix matrix = new matrix ();

Matrix. postrotate (90);/* Flip 90 degrees */
Int width = IMG. getwidth ();
Int Height = IMG. getheight ();
R_img = bitmap. createbitmap (IMG, 0, 0, width, height, matrix, true );

Then you can directly import r_imgdraw to the canvas, for example:
Canvas. drawbitmap (a_img, 10, 10, P );

Easy to use ~~ It seems that many animation effects are also available in many system functions. Matrix is an important class for processing image effects such as flip and zoom.

Matrix. postscale: You can set the scaling ratio. The default value is 1.

Refer to the following code for image rotation during drawing:
Public void run (){

Int X0 = 50;

Int Y0 = 50;

Int x 1 = 200;

Int y2 = 200;

Canvas g;

Paint paint = new paint ();

Bitmap IMG = bitmap. createbitmap (x1-x0, y1-y0, bitmap. config. argb_8888 );

G = new canvas (IMG );

Paint. setcolor (color. Blue );

G. drawrect (New rectf (, x1-x0, y1-y0), paint );

Paint. setcolor (color. Red );

G. drawtext ("N", (x1-x0)/2, 10, paint );

G. drawtext ("W", 0, (y1-y0)/2, paint );

G. drawtext ("S", (x1-x0)/2, y1-y0, paint );

G. drawtext ("e", x1-x0-10, (y1-y0)/2, paint );

While (blrun)

{

G = holder. lockcanvas (); // obtain the canvas
Paint. setcolor (color. Red );
G. drawline (x0 + X1)/2,0, (x0 + X1)/2,480, paint );
G. drawline (0, (y0 + Y1)/2,320, (y0 + Y1)/2, paint );
G. Save ();
G. Rotate (180, (x0 + X1)/2, (y0 + Y1)/2 );
G. drawbitmap (IMG, x0, y0, paint );
Paint. setcolor (color. Blue );
G. Restore ();
G. drawline (320,480, paint );
Holder. unlockcanvasandpost (g); // unlock the canvas and submit the painted image
System. Out. println ("Run ");
}
 
}