Setting background image in a custom view

Question

I have created a class which extends View class.

public class SplashScreen extends View

and i use it by setting contentview

View splash = new SplashScreen(this);
setContentView(splash);

I need to set background image but I can't use layout. I think I need to do canvas drawing but I don't know how to do.

protected void onDraw(Canvas canvas) {
  ballBounds.set(ballX-ballRadius, ballY-ballRadius, ballX+ballRadius, ballY+ballRadius);
  paint.setColor(Color.LTGRAY);
  // canvas.drawImage(R.drawable.background_image); (Ps: I know there is no function such as drawImage)"
  canvas.drawOval(ballBounds, paint);}

Why can't you use layout? IF you use LayoutInflator you can. — Nuno Gonçalves, Jun 20 '12 at 08:44
I mean I can't use layout xml. I don't have a xml file for this view. and I can't use — Srht, Jun 20 '12 at 08:48
Related post - [Full screen background image in an activity](https://stackoverflow.com/q/16135984/465053) — RBT, Dec 23 '19 at 11:01

score 5 · Accepted Answer · answered Jun 20 '12 at 09:04

5

If you want to just set the background you can do

public SplashScreen(Context context, AttributeSet attrs) {
    super(context, attrs);
    setBackgroundResource(R.drawable.background);
}

answered Jun 20 '12 at 09:04

Diego Torres Milano

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score 2 · Answer 2 · answered Jun 20 '12 at 08:46

2

you can add image on canvas as:

        Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.pic180);  
        Matrix matrix=new Matrix();
        matrix.postScale(0.8f, 0.8f);
        matrix.postRotate(45);
        Bitmap dstbmp=Bitmap.createBitmap(bmp,0,0,bmp.getWidth(),
        bmp.getHeight(),matrix,true);
        canvas.drawColor(Color.BLACK); 
        canvas.drawBitmap(dstbmp, 10, 10, null);

answered Jun 20 '12 at 08:46

ρяσѕρєя K

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thanks that was what I'm looking for but it slows the app like hell! I need to figure out new way. – Srht Jun 20 '12 at 09:04
Thanks a lot, this is exactly what I was looking for, and it works like a charm. @Srht, you should load the image once, especially if you have this code in OnDraw() – Has AlTaiar Mar 15 '14 at 01:51

score 0 · Answer 3 · edited Mar 14 '14 at 11:16

0

Don't you just want to change SplachScreen type to activity? Then setContentView change to whatever your layout is and if you want that splach screen appear before your application, make it first in Manifest and in splashscreen end, destroy activity and start your application menu activity. Then you won't need View class and less work finding where is problem

edited Mar 14 '14 at 11:16

Has AlTaiar

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answered Jun 20 '12 at 08:57

Paulius Vindzigelskis

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Do I make canvas drawings without using view class? (Maybe a silly question but I really don't know) – Srht Jun 20 '12 at 09:05

Setting background image in a custom view

3 Answers3

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