how to know when listview is finished loading data on android [duplicate]

Answer 1

My solution:

list = (ListView) findViewById(R.id.list);
list.getViewTreeObserver().addOnPreDrawListener(mOnPreDrawListener);
...
private final ViewTreeObserver.OnPreDrawListener mOnPreDrawListener = new ViewTreeObserver.OnPreDrawListener() {
    @Override
    public boolean onPreDraw() {
        mMessageList.getViewTreeObserver().removeOnPreDrawListener(this);
        // Do what you want to do on data loading here

        return true;
    }
};

Answer 2

You can use a Handler to accomplish this task, like this:

In your activity add the Handler as any other property.

private Handler mListViewDidLoadHanlder = new Handler(new Handler.Callback() { 
    @Override
    public boolean handleMessage(Message message) {
        //Do whatever you need here the listview is loaded
        return false;
    }
});

And inside the getView method of your listview you do the comparison to see if the current position is the last one , so , it will finish (just put it before the return):

public View getView(int position, View convertView, ViewGroup parent) {
         //Your views logic here

         if (position == mObjects.size() - 1) {
                mViewDidLoadHanlder.sendEmptyMessage(0);
            }

         return convertView;
     }

Answer 3

You should not rely on the condition of "finish loading data", instead, you should set the image view visibility on the fly.

You should do something like this in your getView method of your list view adapter.

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    final ItemView item;
    if (convertView == null) {
        item = mLayoutInflator.inflate(R.layout.listlayout)
    } else {
        item = (ItemView) convertView;
    }

    ImageView image = (ImageView)item.findViewById(R.id.yourimageidinitemview);
    if(mTodoTask[posistion].isChecked) {
        image.setVisibility(View.Visible);
    } else {
        image.setVisibility(View.Invisible);
    }
    return item;
}

Answer 4

It worked for me (mc.android.developer):

listview.getViewTreeObserver().addOnPreDrawListener(OnPreDrawListener);

private final ViewTreeObserver.OnPreDrawListener OnPreDrawListener = new ViewTreeObserver.OnPreDrawListener() {
    @Override
    public boolean onPreDraw() {

    //do changes
        return true;
    }
};

Answer 5

Ok, i manage to solve the problem.

All i had to do, was override the getView method as said.

But, since Im using a SimpleCursorAdapter extended Class, I had to do something like this:

public View getView(int position, View convertView, ViewGroup parent){

     View item = super.getView(position, convertView, parent);

     //Validation code for drawing or not the check image


     return item;
}

So, that did the work, and now everytime the listview is reordered or drawn or scrolled the views are refreshed correctly.

Thanks guys for the help