Image doesn't display in android emulator

I make a Single Window Application(I don't use Alloy). And I wrote a simple code like below. It's only change form original code when project made.

<<FirstView.js>>

function FirstView() { 
    //create object instance, a parasitic subclass of Observable
    var self = Ti.UI.createView();
 
    var iv_pic = Ti.UI.createImageView({
        image:'image/1a.png',
        left:0,
        right:0,
        bottom:0
    });
    self.add(iv_pic);
 
    return self;
 }
 
module.exports = FirstView;

I run this Application in iPhone emulator. It's ok.Image "1a.png" was displayed correctly. but I run this Application in android emulator. It isn't ok.Image "1a.png" wasn't displayed.

I can't understand what is wrong.

titanium version is 3.1. android emulator version is Android 2.2.(I tried in ver 4.4. but result is same)