我有一个listview，用于填充游标中的数据。 listview有一个customadapter。我想在列表视图中突出显示所选项目
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;
}
}
}
我使用的布局是......这是主要的布局。
<?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>
另一个布局包含4个用于Listview的文本框。
现在我要突出显示Listview中的按下项目。我怎样才能做到这一点。我尝试使用选择器但没有效果。我想要突出显示该项目，直到选择下一个项目。
答案 0 :(得分：2)
如果您想要在列表视图中突出显示所有选定的项目，
**@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
}**
答案 1 :(得分：0)
默认情况下，ListViews没有设置choiceMode，因此默认情况下不会指示当前选择。
要更改此设置，您只需将ListView的choiceMode属性设置为singleChoice即可。 要显示列表中的选定项，还应设置listSelector属性。
示例：
<ListView android:id="@+id/my_list"
android:choiceMode="singleChoice"
android:listSelector="@android:color/darker_gray" />
答案 2 :(得分：0)
继续Rashi的回答，这是一个对我有用的简单方法 - 只需跟踪最后选择的项目，以便在打开当前所选项目之前知道从前一次点击中关闭哪一项。
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;
}
});
答案 3 :(得分：0)
看一下对我有帮助的this answer。
在那里，您将找到如何突出显示listView中的项目，并在选择其他项目之前将其保持突出显示。