Some simple operations for Android bitmap

Original link: http://www.2cto.com/kf/201312/265180.html

All of them are snippets of code that need to be pasted directly past

/** get drawable picture   can loop   1. Picture name    2.drawable 3. Package name      **/    int imgid = Getresources (). Getidentifier ("Ic_ Launcher "," drawable "," com.example.anywight ");    Text.setbackgroundresource (Imgid);

/** by Image ID Bitmap  **/    Bitmap bitmap=bitmapfactory.decoderesource (getresources (), R.drawable.ic_launcher) ;

/** View turn Bitmap **/public static Bitmap convertviewtobitmap (view view, int bitmapwidth, int bitmapheight) {         Bitmap bit Map = Bitmap.createbitmap (Bitmapwidth, Bitmapheight, Bitmap.Config.ARGB_8888);    View.draw (New Canvas (bitmap));    return bitmap;}

/** convert control to Bitmap **/public static Bitmap convertviewtobitmap (view view) {// Open the image cache view.setdrawingcacheenabled (true);//The measure and layout methods must be called to successfully save the visual component's to PNG image File//measure the View size view.measure ( Measurespec.makemeasurespec (0, measurespec.unspecified), Measurespec.makemeasurespec (0, MeasureSpec.UNSPECIFIED)) ;//Send location and size to view and all of its sub-viewview.layout (0, 0, view.getmeasuredwidth (), View.getmeasuredheight ());//Get Visual Component bitmap Bitmap = View.getdrawingcache (); return bitmap;} 

<span style= "font-family:arial, Helvetica, Sans-serif;" ></span><pre name= "code" class= "java" >public static Bitmap Getbitmapfromview (view view) {    Bitmap Returnedbitmap = Bitmap.createbitmap (View.getwidth (), View.getheight (), Bitmap.Config.ARGB_8888);    Canvas canvas = new canvas (returnedbitmap);    drawable bgdrawable = View.getbackground ();    if (bgdrawable! = null)        Bgdrawable.draw (canvas);    else        Canvas.drawcolor (color.white);    View.draw (canvas);    return returnedbitmap;}

/** gets the code for the Bitmap object of the screen as follows **/public Bitmap getscreenpic (view view) {View Rootview = View.getrootview ();    Rootview.setdrawingcacheenabled (TRUE);    Rootview.builddrawingcache (); Do not understand why here return an empty, there is a post that cannot be called in the Oncreat method//Measurement view size rootview.measure (Measurespec.makemeasurespec (0, Measurespec.unspec    ified), Measurespec.makemeasurespec (0, measurespec.unspecified));    Send location and dimensions to view and all of its sub-view rootview.layout (0, 0, rootview.getmeasuredwidth (), Rootview.getmeasuredheight ());    Workaround, after invoking the above measure and layout methods, the return value is no longer empty//if you want to create a fixed length and width?    Bitmap Bitmap = Rootview.getdrawingcache ();    Rootview.destroydrawingcache ();  return bitmap;} /** drawable→bitmap **/public static Bitmap drawabletobitmap (drawable drawable) {Bitmap Bitmap = Bitmap.createbi TMap (Drawable.getintrinsicwidth (), Drawable.getintrinsicheight (), drawable.getopacity ()! = Pixelformat.opaque?    Bitmap.Config.ARGB_8888:Bitmap.Config.RGB_565);    Canvas canvas = new canvas (bitmap); Canvas.setBitmap (BITMAP);    Drawable.setbounds (0, 0, drawable.getintrinsicwidth (), Drawable.getintrinsicheight ());    Drawable.draw (canvas); return bitmap; }/** bitmap→drawable **/public static drawable bitmaptodrawable (Context context,string filename) {bitmap imag       e = null;          Bitmapdrawable DDD = null;              try {Assetmanager am = context.getassets ();              InputStream is = am.open (filename);              Image = Bitmapfactory.decodestream (IS);              DDD = new Bitmapdrawable (context.getresources (), image);          Is.close ();   } catch (Exception e) {} return DDD; }/** byte[]→bitmap **/public static Bitmap bytetodrawable (Context context,byte[] bb) {Bitmap pp = Bitmapfactory.d     Ecodebytearray (BB, 0, Bb.length);  Return pp;} /** bitmap→byte[]**/public Static byte[] Bitmaptobyte (Bitmap Bitmap) {Bytearrayoutputstream BAOs = new Bytearra      Youtputstream (); Bitmap.compress (Bitmap.CompressFormat.PNG, +, BAOs);    byte[] yy = Baos.tobytearray ();  return yy;} /** convert text to bitmap **/public static bitmap createtxtimage (String txt, int txtsize) {Bitmap mbmptest = Bitmap.cre    Atebitmap (Txt.length () * txtsize + 4, Txtsize + 4, config.argb_8888);    Canvas canvastemp = new canvas (mbmptest);    Paint p = new paint ();    P.setantialias (TRUE);    P.setcolor (Color.White);    P.settextsize (txtsize);    Canvastemp.drawtext (TXT, 2, txtSize-2, p); return mbmptest; The/** display Bitmap is scaled **/public Bitmap Bitmapscanel (Context context) {//Openrawresource gets a InputStream object I      Nputstream InputStream = Context.getresources (). Openrawresource (R.id.backageground);      Create a Bitmapdrawable object from a inputstream bitmapdrawable drawable = new bitmapdrawable (InputStream);      Get Bitmap object Bitmap Bitmap = Drawable.getbitmap () by Bitmapdrawable object;      Create thumbnails with bitmap objects bitmap = Thumbnailutils.extractthumbnail (Bitmap, 40, 40);  return bitmap; }/** putLarge shrink picture **/public static Bitmap Zoombitmap (Bitmap bitmap,int w,int h) {int width = bitmap.getwidth ();      int height = bitmap.getheight ();      Matrix matrix = new Matrix ();      float SCALEWIDHT = ((float) w/width);      float ScaleHeight = ((float) h/height);      Matrix.postscale (SCALEWIDHT, ScaleHeight);      Bitmap newbmp = Bitmap.createbitmap (Bitmap, 0, 0, width, height, matrix, true);  return newbmp; }/** method for getting rounded pictures **/public static Bitmap Getroundedcornerbitmap (Bitmap bitmap,float roundpx) {Bitmap OUTP      UT = Bitmap.createbitmap (Bitmap.getwidth (), Bitmap. GetHeight (), config.argb_8888);       Canvas canvas = new canvas (output);      final int color = 0xff424242;      Final Paint paint = new paint ();      Final rect rect = new Rect (0, 0, bitmap.getwidth (), Bitmap.getheight ());       Final RECTF RECTF = new RECTF (rect);      Paint.setantialias (TRUE);      Canvas.drawargb (0, 0, 0, 0);      Paint.setcolor (color); Canvas.drawroundrect (RECTF, ROUNDPX, ROUNDPX, paint);      Paint.setxfermode (New Porterduffxfermode (mode.src_in));       Canvas.drawbitmap (Bitmap, rect, rect, paint);  return output; /** bitmap is clipped **/public bitmap bitmapclip (context context, int ID, int x, int y) {Bitmap map = Bitma     Pfactory.decoderesource (Context.getresources (), id);     Map = Bitmap.createbitmap (map, x, y, 120, 120);   return map;}     /** * Image Reflection effect */public static Bitmap createreflectedimage (Bitmap originalimage) {final int reflectiongap = 4;    int width = originalimage.getwidth ();     int height = originalimage.getheight ();    Matrix matrix = new Matrix ();     Matrix.prescale (1,-1);    Create a Bitmap with the flip matrix applied to it.            We only want the bottom half of the image Bitmap Reflectionimage = Bitmap.createbitmap (originalimage, 0,     HEIGHT/2, Width, HEIGHT/2, matrix, false); Create a new bitmap with same width but taller to fit reflection bitmap Bitmapwithreflection = Bitmap.createbitmap (width, (height + height/2), config.argb_8888); Create a new canvas with the bitmap this ' s big enough for//the image plus gap plus reflection canvas canvas = N    EW Canvas (bitmapwithreflection);    Draw in the original image Canvas.drawbitmap (originalimage, 0, 0, NULL);    Draw in the gap paint Defaultpaint = new paint ();    Canvas.drawrect (0, height, width, height + reflectiongap, defaultpaint);     Draw in the Reflection Canvas.drawbitmap (reflectionimage, 0, height + reflectiongap, null);    Create a shader that's a linear gradient that covers the reflection paint paint = new paint ();                    LinearGradient shader = new LinearGradient (0, Originalimage.getheight (), 0, Bitmapwithreflection.getheight ()    + Reflectiongap, 0X70FFFFFF, 0X00FFFFFF, Tilemode.clamp);    Set the paint to use this shader (linear gradient) paint.setshader (shader); Set the Transfer mode to be Porter DUff and destination in Paint.setxfermode (new Porterduffxfermode (mode.dst_in)); Draw a rectangle using the paint with our linear gradient canvas.drawrect (0, height, width, bitmapwithreflection.get     Height () + reflectiongap, paint); return bitmapwithreflection; }

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Some simple operations for Android bitmap