Drawable image on a canvas

Question

How can I get an image to the canvas in order to draw on that image

User · Answer

You need to load your image as bitmap    Resources res   getResources     Bitmap bitmap   BitmapFactory decodeResource res  R drawable your image     Then make the bitmap mutable and create a canvas over it   Canvas canvas   new Canvas bitmap copy Bitmap Config ARGB 8888  true      You then can draw on the canvas

User · Answer

The good way to draw a Drawable on a canvas is not decoding it yourself but leaving it to the system to do so   Drawable d   getResources   getDrawable R drawable foobar  null   d setBounds left  top  right  bottom   d draw canvas     This will work with all kinds of drawables  not only bitmaps  And it also means that you can re-use that same drawable again if only the size changes

User · Answer

Drawable d   ContextCompat getDrawable context  R drawable      d setBounds left  top  right  bottom   d draw canvas

User · Answer

try this  Bitmap mBitmap   Bitmap createScaledBitmap Bitmap src  int dstWidth  int dstHeight  boolean filter    protected void onDraw Canvas canvas                canvas drawColor 0xFFAAAAAA               canvas drawBitmap mBitmap  0  0  mBitmapPaint

User · Answer

package com android jigsawtest   import android content Context  import android graphics Bitmap  import android graphics BitmapFactory  import android graphics Canvas  import android graphics Color  import android graphics Paint  import android view SurfaceHolder  import android view SurfaceView   public class SurafaceClass extends SurfaceView implements         SurfaceHolder Callback       Bitmap mBitmap  Paint paint  new Paint        public SurafaceClass Context context            super context           mBitmap   BitmapFactory decodeResource getResources    R drawable icon              TODO Auto-generated constructor stub             Override     public void surfaceChanged SurfaceHolder holder  int format  int width              int height               TODO Auto-generated method stub              Override     public void surfaceCreated SurfaceHolder holder               TODO Auto-generated method stub              Override     public void surfaceDestroyed SurfaceHolder holder               TODO Auto-generated method stub              Override     protected void onDraw Canvas canvas            canvas drawColor Color BLACK           canvas drawBitmap mBitmap  0  0  paint

User · Answer

also you can use this way  it will change your big drawble fit to your canvas   Resources res   getResources    Bitmap bitmap   BitmapFactory decodeResource res  yourDrawable   yourCanvas drawBitmap bitmap  0  0  yourPaint

[android] Drawable image on a canvas

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