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POHow to change a color for dynamically created buttons in a gridview
 

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  1. POHow to change a color for dynamically created buttons in a gridview
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    <p>Hello I was using this tutorial in order to create an arraylist of button description that would allow me to create the buttons. <a href="http://www.stealthcopter.com/blog/2010/09/android-creating-a-custom-adapter-for-gridview-buttonadapter/" rel="nofollow">http://www.stealthcopter.com/blog/2010/09/android-creating-a-custom-adapter-for-gridview-buttonadapter/</a></p> <pre><code>public class CategoryButtonAdapter extends BaseAdapter{ private Context mContext; private ArrayList&lt;DishCategory&gt; dishCategories; //button to be created private Button button; //will take in an array list created in the orderlayout that will be the //dish category. This will be the from where we will the count for the adapter public CategoryButtonAdapter(ArrayList&lt;DishCategory&gt; dishCategories) { this.dishCategories = dishCategories; } public CategoryButtonAdapter(Context context, ArrayList&lt;DishCategory&gt; dishCategories) { this.mContext = context; this.dishCategories = dishCategories; } public int getCount() { return dishCategories.size(); } //to be implementated later so it can b3e used to find menu categories public Object getItem(int position) { return null; } public long getItemId(int position) { return position; } public View getView(int position, View convertView, ViewGroup parent) { //button to be created if(convertView == null ) { //if it is not recycled, initialize some new attributes button = new Button(this.mContext); button.setLayoutParams(new GridView.LayoutParams(100,100)); button.setPadding(2,2,2,2); } else { button = (Button) convertView; } //setButton to the description of the category button.setText(dishCategories.get(position).getDescription()); //this can be changed later to change the sex appeal of the app //for now it will be plain button.setTextColor(Color.WHITE); button.setBackgroundColor(Color.BLACK); button.setHighlightColor (Color.GREEN); button.setId(position); button.setOnClickListener(new DishCategoryButtonListener(button.getId())); //new loadDishItems(categoryButtons.get(position).getDescription())); return button; } </code></pre> <p>Now it is able to create the buttons as wished when called upon in the main activity. Here is my custom onclicklistener class </p> <pre><code> DishCategoryButtonListener implements OnClickListener { private final int position; private DishCategoryButtonListener(int position) { this.position = position; } public void onClick(View v) { System.out.println("The position is " + position); //button.setTextColor(Color.BLACK); //button.setBackgroundColor(Color.GREEN); } </code></pre> <p>The issue I would run into is that whenever I selected a button on the screen. It would show me the correct position, but for some reason it does not change color to green and black if it was selected. I want it to be green if selected and black if it is not. Is there a way I could do this? Would I have to implement the onclick listener in the main class or would I have to use this custom listener?</p> <p>*<em>EDIT</em>*I just tried that and instead what I have seen is a pattern. Lets say the list contains about 20 objects in the array list. This then creates 20 buttons in a 1 column gridview. What seems to be happening is that whenever on of them is clicked, it actually changes the color of the button at the bottom of screen. If I scroll down, it changes the color of that button at the bottom of the screen.</p>
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