How to highlight ListView-Items
i got the following problem.
i hav开发者_开发知识库e a ListView with custom rows consisting of an imageview and a textview. the textview's xml code is
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="26px"
android:layout_marginLeft="3px"
android:singleLine="true"
android:ellipsize="end"
android:textColorHighlight="#FEC403"
/>
then i have an itemclicklistener that works fine and i want to highlight the textview that has been clicked by doing the following.
public void onItemClick(AdapterView<?> adaptview, View clickedview, int position,
long id) {
//TODO: ACTIONS
String pathtofile = (String) adaptview.getItemAtPosition(position);
View rowview = (View) adaptview.getChildAt(position);
rowview.setSelected(true);}
i wanted the highlight color to be "#FEC403" in the xml (that is a light orange) but the highlightcolor still is gray. so how to set the highlightcolor correctly?
thanks in advance
EDIT:
here is how i did it finally:
this is my ListView Item xml file:
<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/rowselector"
>
<ImageView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/musicicon"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:src="@drawable/musicicon"
android:paddingLeft="3px"
/>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="26px"
android:layout_marginLeft="3px"
android:singleLine="true"
android:ellipsize="end"
android:focusable="false"
/>
and the rowselector.xml:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_selected="true"
android:drawable="@color/orange" />
</selector>
and at last my OnItemClick is very short now:
@Override
public void onItemClick(AdapterView<?> adaptview, View clickedview, int position,
long id) {
//TODO: ACTIONS
clickedview.setSelected(true);
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long arg3)
{
for(int a = 0; a < parent.getChildCount(); a++)
{
parent.getChildAt(a).setBackgroundColor(Color.BLACK);
}
view.setBackgroundColor(Color.RED);
}
You should use a Selector
.
This question and its answer might help....
In your Activity:
listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long itemid) {
itemOnclickList(position, view);
}
});
public void itemOnclickList(int position, View view) {
if (listview.isItemChecked(position)) {
view.setBackgroundDrawable(getResources().getDrawable(R.drawable.image_checked));
} else {
view.setBackgroundDrawable(getResources().getDrawable(R.drawable.image_uncheck));
}
adapter.notifyDataSetChanged();
}
In your Adapter:
public View getView(int position, View view, ViewGroup parent) {
View convertView = inflater.inflate(R.layout.listdocument_item, null);
ListView lvDocument = (ListView) parent;
if (lvDocument.isItemChecked(position)) {
convertView.setBackgroundDrawable(activity.getResources().getDrawable(R.drawable.image_checked));
} else {
convertView.setBackgroundDrawable(activity.getResources().getDrawable(R.drawable.image_uncheck));
}
return convertView;
}
Good luck!
This is how it should look using selector:
Create a file within drawable called selector_listview_item.xml
, which looks like (change the colors to your own):
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<!-- pressed -->
<item android:drawable="@color/md_grey_200" android:state_pressed="true" />
<!-- default -->
<item android:drawable="@color/white" />
</selector>
Now in your layout which describes the list row (e.g. layout_list_row.xml), On the root layout add the android:background="@drawable/selector_listview_item"
, So the layout would look something like:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="@drawable/selector_listview_item" <!-- this is the important line -->
android:orientation="vertical">
<!-- more stuff here -->
</LinearLayout>
(Note: you might want to add android:focusable="false"
on you items within that listview row, to make the row clickable, as mentioned here)
Done.
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