如何在imageViews数组中的每个imageView周围绘制一个矩形？

Question

I am making an game in Android Studio.

I have an array of fish(imageViews).

I need to put a rectangle around each fish in the array to begin implementing collision detection of the fishes.

In the function below, I create the imageView, add it to my layout, and then move the imageView across the screen.

How do i draw a rectangle around each fish in the array?

I call this function in a runnable every two seconds.

public void spawnFish(){

        Random r = new Random();

        int low = 170;
        int high = 500;

        int start = r.nextInt(high - low) + low;
        int end = r.nextInt(high - low) + low;

        myImage = new ImageView(getContext());
        myImage.setImageBitmap(resizedFish);
        //drawRectangle around myImage for collision detection
        fragment_main.addView(myImage);
        arrayOfEnemies.add(myImage);

        myImage.setX(950);
        myImage.setY(start);


        TranslateAnimation moveLefttoRight = new TranslateAnimation(myImage.getX(), -width, myImage.getY(), end);
        moveLefttoRight.setDuration(12000);
        moveLefttoRight.setFillAfter(true);
        myImage.startAnimation(moveLefttoRight);

        Log.d("fishArraySize", Integer.toString(arrayOfEnemies.size()));

    }

Here is the runnable

    public HUDDrawView(Context context){super(context);
    initMyView();
    }

    public void initMyView(){

        spawnHandler = new Handler();
        SpawnEnemies = new Runnable(){
            public void run(){
                //Log.d("2seconds", "spawnfish");
                spawnFish();
                spawnHandler.postDelayed(this, 2000);

            }
        };

        spawnHandler.post(SpawnEnemies);

}

Answer 1

If you mind me say so, using imageviews for your game in android might be a bad idea for different reasons, those including:

1. Accesibility.
2. Performance.
3. Scalability.

If you want to develop a small Android Game I would recommend you to use SurfaceView and a secondary thread managing all the logic and drawing.

Nonetheless if you still wanna go with that, you should take a look at the method getDrawable() from which you can get the image's bounding box for implementing collisions.

Finally if you still let me and want to try another approach I woule encourage you to look any game framework such as Cocos2dx, Starling or Monogame, you won't regret it!