create OpenGL texture in Java

Helper.java

class Helper {

    ...

    public static int loadTexture(String s){
        Bitmap img;
        try {
            img = BitmapFactory.decodeStream(context.getAssets().open(s));
        } catch (IOException e) {
            return -1;
        }
        int tex[] = new int[1];
        GLES20.glGenTextures(1, tex, 0);
        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, tex[0]);
        GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, img, 0);
        GLES20.glGenerateMipmap(GLES20.GL_TEXTURE_2D);
        GLES20.glTexParameteri(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_LINEAR_MIPMAP_LINEAR);
        GLES20.glTexParameteri(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR);
        GLES20.glTexParameteri(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_CLAMP_TO_EDGE);
        GLES20.glTexParameteri(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_CLAMP_TO_EDGE);
        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, 0);
        img.recycle();
        return tex[0];
    }

tex_map.cpp

static GLuint LoadTextureViaOS(const char* name)
{
	jclass myview = jniEnv->FindClass(boundJavaClass);
	jmethodID method = method = jniEnv->GetStaticMethodID(myview, "loadTexture", "(Ljava/lang/String;)I");
	if (method == 0) {
		return 0;
	}
	return jniEnv->CallStaticIntMethod(myview, method, jniEnv->NewStringUTF(name));
}