Reputation: 417

Highlight and keep highlighted the selected item in Listview

I have a listview that populates the data from the cursor. The listview has a customadapter. I want to highlight the selected item in the listview

public class BillOfSaleActivity extends Activity {

    ListView lv1;
    CustomAdapter listAdapter;

    DbHandler dbHandler;
    Cursor c;

    TextView salesman;
    TextView customer;
    TextView TC;

    String userName;
    String custName;

    Float TotalCost = 0f;


    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_bos_main);

        Intent i = getIntent();
        userName = i.getStringExtra("userName");
        custName = i.getStringExtra("custName");

        salesman = (TextView) findViewById(R.id.tv_bosSalesman);
        customer = (TextView) findViewById(R.id.tv_boscust);
        TC = (TextView) findViewById(R.id.textView_bos_total);

        salesman.setText(userName);
        customer.setText(custName);

        dbHandler = new DbHandler(getApplicationContext());
        c = dbHandler.getBosList();

        if (c != null) {
            if (c.moveToFirst())
                do {
                    Float qty = Float.parseFloat(c.getString(4));
                    Float price = Float.parseFloat(c.getString(5)) * qty;
                    TotalCost = TotalCost + price;
                } while (c.moveToNext());
        }

        c.moveToFirst();
        lv1 = (ListView) findViewById(R.id.listView_bos);
        lv1.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
        lv1.setSelector(R.drawable.list_selector);

        // String []from = new String []
        // {DbHandler.Bos_List_col5,DbHandler.Bos_List_col6};
        listAdapter = new CustomAdapter(getApplicationContext(), c);
        lv1.setAdapter(listAdapter);

        TC.setText("$" + TotalCost);

        lv1.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> arg0, View view, int position,
                    long arg3) {
                view.getFocusables(position);               
                view.setSelected(true);                 
            }
        });
    }

    public class CustomAdapter extends BaseAdapter {
        Cursor cursor;
        Context context;

        public CustomAdapter(Context cont, Cursor c) {

            this.cursor = c;
            this.context = cont;
        }

        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return c.getCount();
        }

        @Override
        public Object getItem(int arg0) {
            // TODO Auto-generated method stub
            return arg0;
        }

        @Override
        public long getItemId(int arg0) {
            // TODO Auto-generated method stub
            return arg0;
        }

        @Override
        public View getView(int position, View view, ViewGroup arg2) {

            Log.i("dhiraj", "In getView");

            LayoutInflater inflater = (LayoutInflater) context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            view = inflater.inflate(R.layout.activity_bos_list, null);

            cursor.moveToPosition(position);

            TextView textView1 = (TextView) view
                    .findViewById(R.id.textView1_bos);
            TextView textView2 = (TextView) view
                    .findViewById(R.id.textView2_bos);
            TextView textView3 = (TextView) view
                    .findViewById(R.id.textView3_bos);
            TextView textView4 = (TextView) view
                    .findViewById(R.id.textView4_bos);

            textView1.setText(cursor.getString(3));
            textView2.setText(cursor.getString(2));
            textView3.setText(cursor.getString(4) + " x  $"
                    + cursor.getString(5));

            Float qty = Float.parseFloat(cursor.getString(4));
            Float price = Float.parseFloat(cursor.getString(5)) * qty;

            textView4.setText("$ " + price);

            return view;
        }

    }
}

The layout I use is... this is the main layout.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <LinearLayout
        android:id="@+id/linz"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:weightSum="2" >

        <TextView
            android:id="@+id/tv_bosSalesman"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:paddingLeft="20dp"
            android:text="Salesman"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textColor="@color/red" />

        <TextView
            android:id="@+id/tv_boscust"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center"
            android:text="Customer"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textColor="@color/lightBlue" />
    </LinearLayout>

    <TextView
        android:id="@+id/tv_bos_header"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/linz"
        android:background="@android:color/darker_gray"
        android:gravity="center"
        android:text="Nota de Venta"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <LinearLayout
        android:id="@+id/lin"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/tv_bos_header"
        android:weightSum="4" >

        <TextView
            android:id="@+id/textView1"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center"
            android:text="Cant"
            android:textAppearance="?android:attr/textAppearanceSmall" />

        <TextView
            android:id="@+id/textView2"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center"
            android:text="Cod"
            android:textAppearance="?android:attr/textAppearanceSmall" />

        <TextView
            android:id="@+id/textView3"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center"
            android:text="Nombre"
            android:textAppearance="?android:attr/textAppearanceSmall" />

        <TextView
            android:id="@+id/textView4"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center"
            android:text="Total"
            android:textAppearance="?android:attr/textAppearanceSmall" />
    </LinearLayout>

    <ListView
        android:id="@+id/listView_bos"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_above="@+id/linz12"
        android:layout_below="@+id/lin"
        android:layout_marginLeft="16dp"
        android:layout_marginRight="16dp"
        android:dividerHeight="1dp"
        android:drawSelectorOnTop="true" />

    <LinearLayout
        android:id="@+id/linz234"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:weightSum="3" >

        <Button
            android:id="@+id/button_bos_eliminar"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="Eliminar"
            android:textColorHint="@color/red" />

        <Button
            android:id="@+id/button_bos_agregar"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="Agregar"
            android:textColorHint="@color/green" />

        <Button
            android:id="@+id/button_bos_finalizar"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="Finalizar"
            android:textColorHint="@color/blue" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/linz12"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@+id/linz234"
        android:layout_alignParentLeft="true"
        android:layout_marginLeft="16dp"
        android:layout_marginRight="16dp"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/textView_bos_total"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="right"
            android:text="Large Text"
            android:textAppearance="?android:attr/textAppearanceLarge" />
    </LinearLayout>

</RelativeLayout>

The other layout contains 4 textboxes which is used for the Listview.

Now I want to highlight the pressed item in the Listview. How can I achieve that. I tried using the selector but no effect. I want that the item is highlighted till next item is selected .

Upvotes: 3

Answers (4)

P.Lorand

Reputation: 1432

Take a look at this answer which helped me as well.

There you will find how to highlight an item in a listView and also keep it highlighted until another item is selected.

Upvotes: 0

Gene Bo

Reputation: 12063

Continuing from Rashi's answer, here's the simple approach that worked for me - just keep track of the last selected item so you know which one to turn off from the previous click, before turning on the current selected item.

public class SomeActivity extends Activity {

    View previouslySelectedItem = null;

    ...
    protected void onCreate(Bundle savedInstanceState) {

        ListView myListView = (ListView)findViewById(R.id.some_list);

        myListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                if (previouslySelectedItem != null)
                {
                    previouslySelectedItem.setBackgroundColor(
                            getResources().getColor(R.color.transparent));
                }

                view.setBackgroundColor(
                        getResources().getColor(R.color.orange));

                previouslySelectedItem = view;
            }
        });

Upvotes: 0

Rashid C Y

Reputation: 121

If u want to keep all selected items highlighted in the listview,

   **@Override
     public void onItemClick(AdapterView<?> adapterView, View view,
                    int position, long arg3) {
              view.setBackgroundColor(getResources().getColor(
                        R.color.pressed_color)); 
            //change the background color or image of the selected item
         }**

Upvotes: 2

user2511882

Reputation: 9152

ListViews by default don't have a choiceMode set, so the current selection is not indicated by default.

To change this, you just need to set the choiceMode attribute of your ListView to singleChoice. And to show selected items in your list, you should also set the listSelector attribute.

Example:

<ListView android:id="@+id/my_list"
        android:choiceMode="singleChoice" 
        android:listSelector="@android:color/darker_gray" />

Upvotes: 0

Highlight and keep highlighted the selected item in Listview

Answers (4)

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