Are you using Native code or Cocos2d-x?

I’m using Cocos2d

Is there any problem with theme? Because every topic in some forums that I read ended with no answer. Like noone want to speak about this.
Also I have a question: is it possible to use force hardware acceleration for Android devices?

It shouldn’t be a proble, you should be able to use the extures the same way.

What do you mean?

What is the problem you are having loading the textures on mobile.

I don’t know how to load ETC1 textures (I mean *.pkm texture files) into my project.
Or how should I correctly load my .png textures and sprites for less GPU usage?

Is there any particular reason you want to load ETC1 textures over png

I load many images and armatures and my FPS drop down to 25-35 FPS and I read that ETC1 textures load faster than PNG.

How many are you loading and have you tried Spritesheets?

Wroting Sprites I mean SpriteSheets. I just need to know how to load .pkm files with separate alpha-file into the project.

separte alpha file?

I used Mali Texture Compression Tools to convert PNG into PKM texture file(ETC1), but ETC1 does not support ALPHA channel so this program also create separate file with this channel.