我在列表视图中使用CheckBox列出已安装的应用程序，我正在选择任何项目并将其发送进行扫描，扫描后我试图更改正确更改的行颜色，但是当我滚动listview时，颜色在下面的多行上发生了变化，我想只更改滚动其他行时不改变的位置。
我在活动中更改行颜色。
String[] separated = result.split(":");
int position = Integer.parseInt(separated[1]);
if (separated[0].equals("R")) {
View v = listView.getChildAt(position);
v.setBackgroundColor(Color.RED);
} else {
View v = listView.getChildAt(position);
v.setBackgroundColor(Color.GREEN);
}
我的BaseAdapter
public class Installedapps extends BaseAdapter {
public List<CustomObject> list;
CustomObject object2;
boolean[] itemChecked;
Activity context;
public Installedapps(Activity context, List<CustomObject> arg1) {
super();
this.context = context;
list = arg1;
itemChecked = new boolean[list.size()];
object2 = new CustomObject();
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return list.size();
}
@Override
public CustomObject getItem(int position) {
// TODO Auto-generated method stub
return list.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
public void remove(int position) {
list.remove(position);
}
@Override
public View getView(final int position, View convertView,
ViewGroup parent) {
final ViewHolder holder;
final CustomObject object = getItem(position);
if (convertView == null) {
holder = new ViewHolder();
// TODO Auto-generated method stub
LayoutInflater inflater = context.getLayoutInflater();
convertView = inflater.inflate(R.layout.adapter_installed_apps,
parent, false);
holder.im = (ImageView) convertView
.findViewById(R.id.allapps_image);
holder.checkBox = (CheckBox) convertView
.findViewById(R.id.btn_scan_allapps);
holder.checkBox.setChecked(false);
holder.md5 = (TextView)convertView.findViewById(R.id.md5TXT);
holder.name = (TextView) convertView
.findViewById(R.id.allapps_pacagename);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
final ApplicationInfo into = PackageUtil.getPackagePath(
context, object.Aplicationname);
String pacage = object.Aplicationname;
String name = (String) into.loadLabel(context.getPackageManager());
Drawable ICON = into.loadIcon(context.getPackageManager());
final File file = new File(into.publicSourceDir);
holder.im.setImageDrawable(ICON);
holder.name.setText(name);
holder.md5.setText(file.toString());
if (itemChecked[position])
holder.checkBox.setChecked(true);
else
holder.checkBox.setChecked(false);
holder.checkBox.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (holder.checkBox.isChecked()){
itemChecked[position] = true;
DetailMessageModel.getInstance().changeState(
file.toString() + ":" + Integer.toString(position)
);
}
else{
itemChecked[position] = false;
RemoveItemModel.getInstance().changeState(
file.toString() + ":" + Integer.toString(position)
);
}
}
});
return convertView;
}
}
class ViewHolder {
CheckBox checkBox;
TextView name, md5;
ImageView im;
}
答案 0 :(得分：1)
不要更改活动中的行颜色。您必须在getView()中执行此操作。
答案 1 :(得分：1)
你可以这样做，因为我使用了6种颜色并在listview中重复它们。 我希望它对你有所帮助。 我的BaseAdapter代码。
public class ListViewAdapterSubCategories extends BaseAdapter{
Context context;
LayoutInflater inflater;
ArrayList<HashMap<String, String>> data;
private int[] color_arr = new int[] {Color.parseColor("#00ADEE"), Color.parseColor("#24B5EC"), Color.parseColor("#42BCEA"), Color.parseColor("#62C2E6"), Color.parseColor("#86CAE3"), Color.parseColor("#A1CFE0")};
HashMap<String, String> resultp = new HashMap<String, String>();
public ListViewAdapterSubCategories (Context context,
ArrayList<HashMap<String, String>> arraylist) {
this.context = context;
data = arraylist;
}
@Override
public int getCount() {
return data.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
public View getView(final int position, View convertView, ViewGroup parent) {
TextView subCategory_name;
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View itemView = inflater.inflate(R.layout.listview_item_subcategory, parent, false);
int colorPos = position % color_arr.length;
itemView.setBackgroundColor(color_arr[colorPos]);
// Get the position
resultp = data.get(position);
return itemView;
}
}
答案 2 :(得分：0)
您的应用依赖于baseAdapter类的编程行为。显然，在这种情况下，这不起作用。所以我建议制作一个自定义适配器。
当你调用适配器时，你可以根据位置编号为每一行设置一个标签。您还可以使用xml为每行设置视图。
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Notes theRec = (Notes) getItem(position);
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View row;
row = inflater.inflate(R.layout.notes_row, null);
TextView title = (TextView) row.findViewById(R.id.text1);
TextView noteId = (TextView) row.findViewById(R.id.noteid);
TextView category = (TextView) row.findViewById(R.id.category);
//you can put your imageview here
接下来，您将行的位置编号指定为其标记：
row.setTag(String.valueOf(position));
return row;
在您的活动中，您会找到listview子项并设置其背景颜色：
View v = mylistview.findViewWithTag(String.valueOf(index));
v.setBackgroundResource(R.color.some_color);
答案 3 :(得分：0)
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if(convertView == null) {
convertView = mInflator.inflate(R.layout.notes_row, null);
holder = new Holder();
holder.title = (TextView) row.findViewById(R.id.text1);
holder.noteId = (TextView) row.findViewById(R.id.noteid);
holder.category = (TextView) row.findViewById(R.id.category);
convertView.setTag(holder)
} else {
holder = (Holder) convertView.getTag();
}
//do whatever here.. set, get values
holder.setBackgroundColor(color_arr[colorPos]);
return convertView;
}
class Holder {
TextView title;
TextView noteId;
TextView category;
}