java - Trouble laying out ImageViews programmatically in RelativeLayout -

i'm trying add 5 or imageviews relativelayout, each new 1 being right of previous one. however, (apparently) of them stacked on each other, if align_parent_left. relevant code snippet:

imageview[] foo = new imageview[levels]; (int = 0; < levels; i++) {      foo[i] = new imageview(context);     layoutfoo.addview(foo[i]);     foo[i].setid(10 + i);     if (i == 0) {         relativelayout.layoutparams fooparams = (relativelayout.layoutparams) foo[i].getlayoutparams();         fooparams.addrule(relativelayout.align_parent_left);         foo[i].setlayoutparams(fooparams);     } else {         relativelayout.layoutparams fooparams = (relativelayout.layoutparams) foo[i].getlayoutparams();         fooparams.addrule(relativelayout.right_of, foo[i-1].getid());         foo[i].setlayoutparams(fooparams);     } } 

any hints i'm doing wrong? shouldn't matter imageviews don't have width (because haven't assigned bitmap them) yet, right?

edit: problem turned out not setting height , width imageview. solution set them either setlayoutparams() or constructor in justwork's example.

you must add imageviews after setting properties them.

move code end of loop:

layoutfoo.addview(foo[i]); 

by way don't need imageview[]. can accomplish 1 imageview.

update:

here code can same thing with:

imageview foo; relativelayout.layoutparams fooparams; (int = 0; < levels; i++) {      foo = new imageview(context);     foo.setid(10 + i);     fooparams = (relativelayout.layoutparams) foo.getlayoutparams(); // don't understand why trying params of hasn't been specified before.     // if you, like:     fooparams = new relativelayout.layoutparams(relativelayout.layoutparams.wrap_content, relativelayout.layoutparams.wrap_content);     if (i == 0) {         fooparams.addrule(relativelayout.align_parent_left);     } else {         fooparams.addrule(relativelayout.right_of, foo.getid()-1);     }     foo.setimagebitmap(yourbitmap); // set bitmap.     foo.setlayoutparams(fooparams);     layoutfoo.addview(foo); }