Android - ListView com 2 cores diferentes
Eu tenho um ListView e quero alterar o Backgroundcolor dele. Deve ser assim. 1.Item = cinza; 2. Item; branco; 3. Item = cinza; 4. Item = branco etc. Por isso deve ter 2 backgroundcolors. Estou tentando arquivar isso por quase duas horas. Eu estou ficando confuso. Eu não consigo me levantar com uma solução. Espero que alguém de você possa me ajudar.
Eu tentei com:
<code> for(int counter = 0; counter < itemList.size(); counter++){
if( adapter.getItem(position) %2 == 1 ){
Layout.setBackgroundColor(Color.GREY)
};
else{
Layout.setBackgroundColor(Color.WHITE);
}
</code>Então aqui está o meu código de buraco. Espero que alguém de você possa me dizer:
Atividade principal
<code>public class MainActivity extends Activity implements OnItemClickListener {
ListView lview3;
ListViewCustomAdapter adapter;
private ArrayList<Object> itemList;
private ItemBean bean;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
prepareArrayLits();
lview3 = (ListView) findViewById(R.id.listView1);
adapter = new ListViewCustomAdapter(this, itemList);
lview3.setAdapter(adapter);
lview3.setOnItemClickListener(this);
}
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long id) {
// TODO Auto-generated method stub
RelativeLayout Layout = (RelativeLayout) findViewById(R.id.relativeLayout1);
ItemBean bean = (ItemBean) adapter.getItem(position);
for(int counter = 0; counter < itemList.size(); counter++){
adapter.getItem(position);
Layout.setBackgroundColor(Color.CYAN);}
Toast.makeText(this, "Title => "+bean.getTitle()+" \n Description => "+bean.getDescription(), Toast.LENGTH_SHORT).show();
}
/* Method used to prepare the ArrayList,
* Same way, you can also do looping and adding object into the ArrayList.
*/
public void prepareArrayLits()
{
itemList = new ArrayList<Object>();
AddObjectToList(R.drawable.ic_add, "add", "Add desc", "2");
AddObjectToList(R.drawable.ic_delete, "Delete", "Delete desc", "2");
AddObjectToList(R.drawable.ic_down, "Down", "Down desc", "2");
AddObjectToList(R.drawable.ic_info, "Information", "Information desc", "2");
AddObjectToList(R.drawable.ic_help, "Help", "Help desc", "2");
AddObjectToList(R.drawable.ic_download, "Download", "Download desc", "2");
AddObjectToList(R.drawable.ic_mail, "Mail", "Mail desc", "2");
AddObjectToList(R.drawable.ic_search, "Search", "Search desc", "2");
AddObjectToList(R.drawable.ic_settings, "Settings", "Settings desc", "2");
}
// Add one item into the Array List
public void AddObjectToList(int image, String title, String desc, String duration)
{
bean = new ItemBean();
bean.setduration(duration);
bean.setDescription(desc);
bean.setImage(image);
bean.setTitle(title);
itemList.add(bean);
}
}
</code>ItemBean
<code>public class ItemBean
{
String title;
String description;
int image;
String duration;
public String getTitle() {
return title;
}
public String getDuration() {
return duration;
}
public void setTitle(String title) {
this.title = title;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public int getImage() {
return image;
}
public void setImage(int image) {
this.image = image;
}
public void setduration(String duration) {
this.duration = duration;
}
}
</code>ListViewCustomAdapter
<code>public class ListViewCustomAdapter extends BaseAdapter{
ArrayList<Object> itemList;
public Activity context;
public LayoutInflater inflater;
public ListViewCustomAdapter(Activity context,ArrayList<Object> itemList) {
super();
this.context = context;
this.itemList = itemList;
this.inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public int getCount() {
// TODO Auto-generated method stub
return itemList.size();
}
public Object getItem(int position) {
// TODO Auto-generated method stub
return itemList.get(position);
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
public static class ViewHolder
{
ImageView imgViewLogo;
TextView txtViewTitle;
TextView txtViewDescription;
TextView duration;
}
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ViewHolder holder;
if(convertView==null)
{
holder = new ViewHolder();
convertView = inflater.inflate(R.layout.items, null);
holder.imgViewLogo = (ImageView) convertView.findViewById(R.id.imgViewLogo);
holder.txtViewTitle = (TextView) convertView.findViewById(R.id.txtViewTitle);
holder.txtViewDescription = (TextView) convertView.findViewById(R.id.txtViewDescription);
holder.duration = (TextView) convertView.findViewById(R.id.duration);
convertView.setTag(holder);
}
else
holder=(ViewHolder)convertView.getTag();
ItemBean bean = (ItemBean) itemList.get(position);
holder.imgViewLogo.setImageResource(bean.getImage());
holder.txtViewTitle.setText(bean.getTitle());
holder.txtViewDescription.setText(bean.getDescription());
holder.duration.setText(bean.getDuration());
return convertView;
}
}
</code>Layout XML: *Unid*
<code><RelativeLayout android:id="@+id/relativeLayout1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="@drawable/list_selector" xmlns:android="http://schemas.android.com/apk/res/android" android:padding="5dip">
<ImageView
android:layout_width="50dip"
android:layout_height="50dip"
android:padding="3dip"
android:id="@+id/imgViewLogo"
android:src="@drawable/icon"
android:layout_alignParentLeft="true"
android:layout_centerInParent="true"
android:background="@drawable/image_bg"
android:layout_marginRight="5dip"
android:scaleType="center"
>
</ImageView>
<TextView
android:textAppearance="?android:attr/textAppearanceLarge"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/imgViewLogo"
android:text="TextView"
android:layout_width="wrap_content"
android:id="@+id/txtViewTitle"
android:layout_toRightOf="@+id/imgViewLogo"
android:textColor="#040404"
android:typeface="sans"
android:textSize="20dip"
android:textStyle="bold"
android:layout_marginRight="15dp"
>
</TextView>
<TextView
android:layout_height="wrap_content"
android:text="TextView"
android:layout_width="wrap_content"
android:id="@+id/txtViewDescription"
android:textColor="#343434"
android:textSize="15dip"
android:layout_marginTop="1dip"
android:layout_toRightOf="@+id/imgViewLogo"
android:layout_below="@+id/txtViewTitle"
android:layout_marginLeft="2dip"
android:layout_marginRight="15dp"
>
</TextView>
<TextView
android:id="@+id/duration"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignTop="@+id/txtViewTitle"
android:gravity="right"
android:layout_marginRight="5dip"
android:textSize="15dip"
android:textColor="#10bcc9"
android:textStyle="bold"/>
<ImageView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/arrow"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
/>
</RelativeLayout>
</code>Layout: *a Principal*
<code><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<ListView
android:id="@+id/listView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:divider="#b5b5b5"
android:dividerHeight="1dp"
android:listSelector="@drawable/list_selector"
/>
</LinearLayout>
</code>Cada dica seria útil, obrigado.