I know it sounds very simple, and there are questions about this. But none of it could solve my problem. So here we go:
I want to change background color of a list item
If you are dealing with ListFragment
then this code will be helpful,
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
if (view != null) {
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
getListView().setDescendantFocusability(ListView.FOCUS_AFTER_DESCENDANTS);
catagoryValueListView=getListView();
catagoryValueListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if (ColoredView != null)
ColoredView.setBackgroundColor(Color.WHITE); //original color
view.setBackgroundColor(Color.BLUE); //selected color
ColoredView = view;
}
});
}
}
Sure thing. I would do this in the getView()
method of a custom ListAdapter
.
MyAdapter extends SimpleAdapter {
private ArrayList<Integer> coloredItems = new ArrayList<Integer>();
public MyAdapter(...) {
super(...);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = super.getView(position, convertView, parent);
if (coloredItems.contains(position)) {
v.setBackgroundColor(Color.CYAN);
} else {
v.setBackgroundColor(Color.BLACK); //or whatever was original
}
return v;
}
}
Update coloredItems
when a list item is clicked.
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
if (coloredItems.contains(position)) {
//remove position from coloredItems
v.setBackgroundColor(Color.BLACK); //or whatever was original
} else {
//add position to coloredItems
v.setBackgroundColor(Color.CYAN);
}
}
Thanks heycosmo. your solution solved my problem.
Have no clue why we should set background in 2 places.
1. Adapter's getView()
@Override
public View getView(int position, View convertView, ViewGroup parent) {
....
....
....
if(arrayBools[position]) {
view.setBackgroundColor(Common.colorBkgroundSelected);
}
else{
view.setBackgroundColor(Common.colorBkgroundNormal);
}
....
....
....
}
2. ListActivity's onListItemClick().
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
arrayBools[position] = ( arrayBools[position] ? false : true );
if(arrayBools[position]) {
v.setBackgroundColor(colorBkgroundSelected);
}
else{
v.setBackgroundColor(colorBkgroundNormal);
}
}
this is how I did it:
create a global variable View ColoredView
; then when you setOnItemClickListener
for your ListView
, do this:
MenuList.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if (ColoredView != null)
ColoredView.setBackgroundColor(Color.WHITE); //original color
view.setBackgroundColor(Color.BLUE); //selected color
ColoredView = view;
}
});
it's the simplest way in my opinion.
Simply you can do it like this in onListItemClick
method
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
for (int a = 0; a < l.getChildCount(); a++) {
l.getChildAt(a).setBackgroundColor(Color.TRANSPARENT);
}
ColorDrawable colorDrawable1 = new ColorDrawable(
Color.parseColor("#A0A3A0"));
v.setBackgroundDrawable(colorDrawable1);
if (position == 0) {
Intent i = new Intent(MainActivity.this, NewActivity.class);
startActivity(i);
}
}
What I do is I create an xml file called i.e. list_background and put it in the drawable folder.
The xml looks like this:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@color/list_selected" android:state_pressed="true" />
<item android:drawable="@android:color/white" />
</selector>
And in the xml code for the ListView's item I put this xml as the items background i.e.
item.xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
style="@style/Fill"
android:background="@drawable/list_background">
<!-- Your layout here -->
</RelativeLayout>
style=@style/Fill is only a short cut i made for android:layout_height="match_parent" and android:layout_width="match_parent
Then in onListItemCLick:
public void onListItemClick(ListView l, View v, int position, long id) {
v.setPressed( !v.isPressed ) //Toggle between colors of the view
}