我必须在列表视图中更改多个所选项目（文本视图）的颜色。我在这里做的是，当用户从列表视图中选择项目时，颜色应该更改为蓝色，当用户取消选择项目时，颜色应该更改为默认颜色（此处为黑色）。我已经通过一些教程并实现了一个小小的演示。但我没有得到，如何处理颜色变化。以下是我的代码......
<?xml version="1.0" encoding="utf-8"?>
<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:layout_height="wrap_content"
android:id="@+id/listView2"
android:layout_width="match_parent">
</ListView>
</LinearLayout>
<?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="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="TextView"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
public class MainActivity extends Activity
{
/** Called when the activity is first created. */
public View row;
ListView lview;
ListViewAdapter lviewAdapter;
private final static String month[] = {"January","February","March","April","May",
"June","July","August","September","October","November","December"};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lview = (ListView) findViewById(R.id.listView2);
lviewAdapter = new ListViewAdapter(this, month);
lview.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
lview.setAdapter(lviewAdapter);
lview.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
}
});
}
}
public class ListViewAdapter extends BaseAdapter
{
ArrayList<Boolean> saved = new ArrayList<Boolean>();
Activity context;
String title[];
String description[];
public ListViewAdapter(Activity context, String[] title) {
super();
this.context = context;
this.title = title;
}
public int getCount() {
// TODO Auto-generated method stub
return title.length;
}
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
private class ViewHolder {
TextView txtViewTitle;
}
public View getView(int position, View convertView, ViewGroup parent)
{
// TODO Auto-generated method stub
ViewHolder holder;
LayoutInflater inflater = context.getLayoutInflater();
if (convertView == null)
{
convertView = inflater.inflate(R.layout.listitem_row, null);
holder = new ViewHolder();
holder.txtViewTitle = (TextView) convertView.findViewById(R.id.textView1);
convertView.setTag(holder);
}
else
{
holder = (ViewHolder) convertView.getTag();
}
holder.txtViewTitle.setText(title[position]);
return convertView;
}
}
答案 0 :(得分：1)
lview.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
TextView textView1 = (TextView) arg1.findViewById(R.id.textView1);
if(lv.isItemChecked(arg2))
textView1.setTextColor(your selected state color);
else
textView1.setTextColor(your unselected state color);
}
});
答案 1 :(得分：1)
只需在res / drawable中创建selector.xml，就像我创建了下面的那个。：
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:state_pressed="true" android:color="#fff"/>
<item android:state_enabled="false" android:color="#cc003300"/>
<item android:color="#cc003300"></item>
</selector>
然后将其分配给xml中的textview。
android:textColor="@drawable/selector_btn_textcolor_green"
将您的代码更新为
<TextView
android:id="@+id/textView1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="TextView"
android:textColor="@drawable/selector_btn_textcolor_green"
android:textAppearance="?android:attr/textAppearanceLarge" />
答案 2 :(得分：0)
对于listitem，您可以将drawable保留为xml资源，您可以将其保存在drawable文件夹中。因此，您可以将压缩，聚焦，正常状态明确地处理为不同的颜色。
答案 3 :(得分：0)
首先，您应该获得项目的选定位置，这样您就可以通过将所选项目传递到List onItemClickListener中的适配器来完成此操作： 在您的适配器类中添加：
public void setSelectedPosition(int pos)
{
selectedPos = pos;
}
在您的活动中，您调用适配器的此功能：
public void selectPosition(int position) {
((YourCustomAdapter)getListView().getAdapter()).setSelectedPosition(position);
}
并在List的ListItemClick侦听器中：
YourList.setOnItemClickListener(new OnItemClickListener()
{
@Override public void onItemClick(AdapterView<?> arg0, View arg1,int position, long arg3)
{
selectPosition(position);
}
});
这里selectedPos是一个全局变量，它接受你的Selected Item，所以你在Adapter中有你选择的Item，然后你可以在getView（）函数中使用它：
if(selectedPos == position)
{
rowView.setBackgroundResource(R.color.listselect_red);
}
else
{
rowView.setBackgroundResource(R.color.listselect_light_grey);
}
答案 4 :(得分：0)
创建新的布局xml文件并从外部库中的simple_list_item_1.xml复制整个代码，然后根据您的需要进行更改。
custom_text.xml
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/text1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#1ca099"
android:textSize="20dp"
android:padding="5dp"
android:gravity="center_vertical"
/>
然后在activity.java文件中：
ListView lst=(ListView) findViewById(R.id.listView);
ArrayAdapter<String> adapter=new ArrayAdapter<String>(getApplicationContext(),R.layout.custom_text,cultural);
lst.setAdapter(adapter);