Activating/using GL_TEXTURE1 at OpenGL ES 2.0 for Android -

i'm trying use gl_texture1 texture unit draw simple shape. know how draw using standard gl_texture0, when changing not working.

i thought code below, had change following:

glactivetexture(gl_texture1); gluniform1i(utexturelocation, 1); 

what i'm missing?

code:

public class rendererclass implements renderer {  context context;  floatbuffer verticesinbuffer;  int apositionlocation; int atexturelocation; int utexturelocation;  int program;  public rendererclass(context context){     this.context = context; }  @override public void onsurfacecreated(gl10 arg0, eglconfig config) {      gles20.glclearcolor(1.0f, 0.0f, 0.0f, 0.0f);      float[] vertices = {              -0.5f, 0.5f, 0.5f, 0.5f,             -1.0f, 0.0f, 0.0f, 0.0f,              0.0f, 0.0f, 1.0f, 0.0f,              0.0f, 1.0f, 1.0f, 1.0f,             -1.0f, 1.0f, 0.0f, 1.0f,             -1.0f, 0.0f, 0.0f, 0.0f        };      verticesinbuffer = bytebuffer.allocatedirect(vertices.length*4).order(byteorder.nativeorder()).asfloatbuffer().put(vertices);      string vss = "attribute vec4 a_position;" +                  "attribute vec2 a_texture;" +                  "varying vec2 v_texture;" +                  "void main(){" +                  "    v_texture = a_texture;" +                  "    gl_position = a_position;" +                  "}";      string fss = "precision mediump float;" +                  "varying vec2 v_texture;" +                  "uniform sampler2d u_texture;" +                  "void main(){" +                  "    gl_fragcolor = texture2d(u_texture, v_texture);" +                  "}";      int vs = glcreateshader(gl_vertex_shader);     int fs = glcreateshader(gl_fragment_shader);      glshadersource(vs, vss);     glshadersource(fs, fss);      glcompileshader(vs);     glcompileshader(fs);      program = glcreateprogram();      glattachshader(program, vs);     glattachshader(program, fs);      gllinkprogram(program);      apositionlocation = glgetattriblocation(program, "a_position");       // ***** texture stuff starts here   </</</</       // fase 1     glactivetexture(gl_texture0);      int[] gentextures = new int[1];     glgentextures(1, gentextures, 0);      glbindtexture(gl_texture_2d, gentextures[0]);      gltexparameteri(gl_texture_2d, gl_texture_min_filter, gl_linear_mipmap_linear);     gltexparameteri(gl_texture_2d, gl_texture_mag_filter, gl_nearest);       // fase 2     bitmapfactory.options options = new bitmapfactory.options();     options.inscaled = false;      bitmap bitmap1 = bitmapfactory.decoderesource(context.getresources(), r.drawable.res_for_test_1, options);       // fase 3     teximage2d(gl_texture_2d, 0, bitmap1, 0);     glgeneratemipmap(gl_texture_2d);           // fase 4     atexturelocation = glgetattriblocation(program, "a_texture");     utexturelocation = glgetuniformlocation(program, "u_texture");      gluniform1i(utexturelocation, 0);      verticesinbuffer.position(2);     glenablevertexattribarray(atexturelocation);     glvertexattribpointer(atexturelocation, 2, gl_float, false, 16, verticesinbuffer);    // ***** texture stuff ends here   </</</</   }  @override public void onsurfacechanged(gl10 arg0, int width, int height) {      gles20.glviewport(0, 0, width, height);  }  @override public void ondrawframe(gl10 glunused) {      gles20.glclear(gles20.gl_color_buffer_bit);      gluseprogram(program);      verticesinbuffer.position(0);     glenablevertexattribarray(apositionlocation);     glvertexattribpointer(apositionlocation, 2, gl_float, false, 16, verticesinbuffer);      gldrawarrays(gl_triangle_fan, 0, 6);  }  } 

you need specify active texture unit , assign loaded texture it.

for convenience, i've created helper function of this. activates given texture unit, assigns texture given id , puts value sampler2d uniform of shader:

protected void settexture2d(int textureunit, int textureid, int uniformid) {     gles20.glactivetexture(gles20.gl_texture0 + textureunit);     gles20.glbindtexture(gles20.gl_texture_2d, textureid);     gles20.gluniform1i(uniformid, textureunit); } 

and call this:

settexture2d(0, textureid, uniformid);