RelativeLayout.LayoutParams.WRAP_CONTENT make ImageView smaller in loop

Question

I add ImageView to layout in runtime, But ImageView is smaller after every loop. This is my code:

 layout = (RelativeLayout)findViewById(R.id.layout_main); width = getWindowManager().getDefaultDisplay().getWidth(); height = getWindowManager().getDefaultDisplay().getHeight( for(int i=0; i< fruit.size();i++) { int id = getApplicationContext().getResources().getIdentifier(fruit.get(i).file, "drawable", getApplicationContext().getPackageName()); int h = random.nextInt(height); int w = random.nextInt(width); Logger.debug(TAG, "drawable/"+fruit.get(i).file+":"+id+":X="+w+":Y="+h); ImageView imageView =new ImageView(getApplicationContext()); imageView.setImageResource(id); imageView.setScaleX(0.3f); imageView.setScaleY(0.3f); RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT); layoutParams.setMargins(w,h,0,0); imageView.setLayoutParams(layoutParams); layout.addView(imageView);

And this is my result: enter image description here

Please help me why and how to fix it? Thank you very much

More information: If I replace code

RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT); layoutParams.setMargins(w,h,0,0); imageView.setLayoutParams(layoutParams);

By

imageView.setY(h); imageView.setX(w);

Result will enter image description here

sachithkn · Accepted Answer · 2015-07-01 07:41:24Z

1

may be this create problem

layoutParams.setMargins(w,h,0,0);

setmargin put margin as setMargins(int left, int top, int right, int bottom)

answered Jul 1, 2015 at 7:41

sachithkn

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4 Comments

songoku1610 Over a year ago

You're right, this is cause of problem, Do you know how to set position of ImageView instead use setMargins?

sachithkn Over a year ago

try this stackoverflow.com/questions/6535648/… else try to set padding for layout layout.setPadding(0,padding,0,0); It will have same effect as margin.

songoku1610 Over a year ago

I used setX(), setY() and this is result: i.sstatic.net/IzEcW.png. It always have a large space from left and top screen. I don't know why?

sachithkn Over a year ago

may be that margin is from layout ,have a look

Taha · Accepted Answer · 2015-07-01 07:54:08Z

I believe it's because of the Random class. You are already bounding the random number. You can shift the generated number, if you don't want it to approach to zero.

int h = random.nextInt(height) + height;

Or you can change the seed if you are providing any. Please see the link below.

How the random numbers are calculated.

h and w only used for margin, if use your code, every object will fly out of screen

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