Android 具有两行布局的游标适配器
好吧,既然我在搜索时没有找到一致的方法,我决定把我的代码放在别人的眼睛里看可能会有帮助 我正在制作一个你使用纸牌的游戏。这些卡可以根据不同的因素锁定或解锁。重要的是,我想检查sqlite db是否被锁定,然后为两种可能的结果显示不同的行布局 这是我的密码:Android 具有两行布局的游标适配器,android,android-cursoradapter,Android,Android Cursoradapter,好吧,既然我在搜索时没有找到一致的方法,我决定把我的代码放在别人的眼睛里看可能会有帮助 我正在制作一个你使用纸牌的游戏。这些卡可以根据不同的因素锁定或解锁。重要的是,我想检查sqlite db是否被锁定,然后为两种可能的结果显示不同的行布局 这是我的密码: public class AllCardsAdapter extends CursorAdapter { LockedHolder viewLocked; UnlockedHolder viewUnlocked; private Layou
public class AllCardsAdapter extends CursorAdapter {
LockedHolder viewLocked;
UnlockedHolder viewUnlocked;
private LayoutInflater mInflater;
public static final int LOCKED = 0;
public static final int UNLOCKED = 1;
public AllCardsAdapter(Context context, Cursor cursor) {
super(context, cursor);
mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
final int type;
int viewType = this.getItemViewType(cursor.getInt(cursor.getColumnIndex("unlocked")));
if (viewType == 1){
type = UNLOCKED;
} else {
type = LOCKED;
}
if (type == LOCKED){
viewLocked = (LockedHolder) view.getTag();
viewLocked.nameHolder.setText(cursor.getString(cursor.getColumnIndex("name")));
viewLocked.awardedAtHolder.setText("Awarded at level:");
viewLocked.reqLvlHolder.setText(cursor.getString(cursor.getColumnIndex("reqlvl")));
String imagePath = cursor.getString(cursor.getColumnIndex("image"));
if (imagePath.equals("card_obj_plus_1")){
Picasso.with(context).load(R.drawable.card_obj_plus_1).placeholder(R.drawable.card_placeholder).into(viewLocked.imageHolder);
}
if (imagePath.equals("card_obj_plus_2")){
Picasso.with(context).load(R.drawable.card_obj_plus_2).placeholder(R.drawable.card_placeholder).into(viewLocked.imageHolder);
}
if (imagePath.equals("card_obj_plus_3")){
Picasso.with(context).load(R.drawable.card_obj_plus_3).placeholder(R.drawable.card_placeholder).into(viewLocked.imageHolder);
}
if (imagePath.equals("card_slowdown")){
Picasso.with(context).load(R.drawable.card_slowdown).placeholder(R.drawable.card_placeholder).into(viewLocked.imageHolder);
}
if (imagePath.equals("card_speed_up")){
Picasso.with(context).load(R.drawable.card_speed_up).placeholder(R.drawable.card_placeholder).into(viewLocked.imageHolder);
}
} else {
viewUnlocked = (UnlockedHolder) view.getTag();
viewUnlocked.nameHolder.setText(cursor.getString(cursor.getColumnIndex("name")));
String imagePath = cursor.getString(cursor.getColumnIndex("image"));
if (imagePath.equals("card_obj_plus_1")){
Picasso.with(context).load(R.drawable.card_obj_plus_1).placeholder(R.drawable.card_placeholder).into(viewUnlocked.imageHolder);
}
if (imagePath.equals("card_obj_plus_2")){
Picasso.with(context).load(R.drawable.card_obj_plus_2).placeholder(R.drawable.card_placeholder).into(viewUnlocked.imageHolder);
}
if (imagePath.equals("card_obj_plus_3")){
Picasso.with(context).load(R.drawable.card_obj_plus_3).placeholder(R.drawable.card_placeholder).into(viewUnlocked.imageHolder);
}
if (imagePath.equals("card_slowdown")){
Picasso.with(context).load(R.drawable.card_slowdown).placeholder(R.drawable.card_placeholder).into(viewUnlocked.imageHolder);
}
if (imagePath.equals("card_speed_up")){
Picasso.with(context).load(R.drawable.card_speed_up).placeholder(R.drawable.card_placeholder).into(viewUnlocked.imageHolder);
}
}
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
viewLocked = new LockedHolder();
viewUnlocked = new UnlockedHolder();
final int type;
int viewType = this.getItemViewType(cursor.getInt(cursor.getColumnIndex("unlocked")));
if (viewType == 1){
type = UNLOCKED;
} else {
type = LOCKED;
}
System.out.println(viewType);
System.out.println(type);
if (type == LOCKED){
View lockedView;
lockedView = mInflater.inflate(R.layout.card_list_row_disabled, parent, false);
viewLocked.nameHolder = (TextView) lockedView.findViewById(R.id.txtTitle);
viewLocked.imageHolder = (ImageView) lockedView.findViewById(R.id.imgThumbnail);
viewLocked.reqLvlHolder = (TextView) lockedView.findViewById(R.id.tvLevelNr);
viewLocked.awardedAtHolder = (TextView) lockedView.findViewById(R.id.tvAwardedAt);
lockedView.setTag(viewLocked);
return lockedView;
} else {
View unlockedView;
unlockedView = mInflater.inflate(R.layout.card_list_row, parent, false);
viewUnlocked.nameHolder = (TextView) unlockedView.findViewById(R.id.txtTitle);
viewUnlocked.imageHolder = (ImageView) unlockedView.findViewById(R.id.imgThumbnail);
unlockedView.setTag(viewUnlocked);
return unlockedView;
}
}
@Override
public int getViewTypeCount() {
return 2;
}
@Override
public int getItemViewType(int position) {
return position % 2;
}
public class LockedHolder {
public TextView nameHolder;
public ImageView imageHolder;
public TextView awardedAtHolder;
public TextView reqLvlHolder;
}
public class UnlockedHolder {
public TextView nameHolder;
public ImageView imageHolder;
}
}
我得到的错误在“viewLocked=(LockedHolder)view.getTag();”行上
AllCardsAdapter$UnlockedHolder不能强制转换为AllCardsAdapter$LockedHolder
只有当我有一个包含已锁定和未锁定卡片的列表时,错误才会出现
看,我知道它想做什么,我只是不知道为什么。另外,如果我无缘无故地将事情过度复杂化,或者遗漏了一些明显的东西,如果您能找到它,我将不胜感激。getItemViewType实现看起来不正确(类型不取决于项目位置),它应该如下所示
private int getItemViewType(Cursor cursor) {
return cursor.getInt(cursor.getColumnIndex("unlocked")) % 2;
}
@Override
public int getItemViewType(int position) {
Cursor cursor = (Cursor) getItem(position);
return getItemViewType(cursor);
}
您还需要更新bindView和newView
这是因为该位置的视图标记被设置为UnlockedHolder,并且您正试图将其投射回LockedHolder。我会尝试使用一个视图持有者,并在该视图持有者内部设置条件,以确定如何处理它。
int viewType = this.getItemViewType(cursor);