Android OpenGL: How to change bitmap attached to texture?

Question

I have created a texture like this

public int createTexture(Bitmap bitmap){
 final int[] textureHandle = new int[1];
 GLES20.glGenTextures(1, textureHandle, 0);
 glBindTexture(GLES20.GL_TEXTURE_2D, textureHandle[0]);       
 glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_NEAREST);
 glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_NEAREST);
 // Load the bitmap into the bound texture.
 GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, bitmap, 0); 
 return textureHandle[0];
}

Now based on the user input I want to update my Texture with the new Bitmap. I tried recalling same function with different Bitmap but its not getting updated. Am I doing something wrong here?

EDIT

I tried as Tommy said in his answer but no use. Let me elaborate how I am using textures.

public void changeFilter(){
  //create required bitmap here
  if(mTextureDataHandle1==0) 
    mTextureDataHandle1 =loadTexture(bitmap); 
  else 
      updateTexture(mTextureDataHandle1);
}

In onDrawFrame

 glActiveTexture(GL_TEXTURE1);
 glBindTexture(GL_TEXTURE_2D, mTextureDataHandle1);
 glUniform1i(mTextureUniformHandle1, 1);

Answer 1

That method both creates a new texture and uploads a Bitmap to it. It sounds like you want to do the second thing but not the first? If so then provide the int texture name as a parameter rather than receiving it as a result, and skip straight to the glBindTexure (i.e. omit the glGenTextures, which is what creates the new texture).

E.g.

public int createTexture(Bitmap bitmap){
 final int[] textureHandle = new int[1];
 GLES20.glGenTextures(1, textureHandle, 0);
 glBindTexture(GLES20.GL_TEXTURE_2D, textureName);       
 glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_NEAREST);
 glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_NEAREST);
 updateTexture(textureHandle[0], bitmap);
 return textureHandle[0];
}

public void updateTexture(int textureName, Bitmap bitmap) {
 glBindTexture(GLES20.GL_TEXTURE_2D, textureName);       
 // Load the bitmap into the bound texture.
 GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, bitmap, 0); 
}

So the bit where you upload a Bitmap is factored out from the bit where you create a texture and set its filtering type; to update an existing texture use the int you got earlier and call directly into updateTexture.