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我在android系統編程一個簡單的遊戲，我遇到了一個問題recyclerview。我需要幫助，Tnx :)Recyclerview意外的onclick項目
我有一個活動，創建一個arrayList並將我的數據添加到它，然後將其傳遞給我的recyclerview的適配器。在adapter我編寫代碼，用戶不能選擇超過一個圖像。現在問題出現在我選擇第一個項目然後滾動時recyclerview我看到最後三個項目中的一個被選中。這種情況只發生在第一行項目和最後三項。
我只要做什麼？
我的活動：
public class page_register extends AppCompatActivity {
Activity _A;
Context _C;
private RecyclerView recyclerView1, recyclerView2;
private AdsAdapter adapter1;
private Avatar2Adapter adapter2;
private ArrayList<Ads> adsArrayList;
TextView Tv1, Tv2;
EditText ET1, ET2;
Button BT_First, BT_Second;
ImageButton BT_Back;
ImageView img_first, img_second;
CardView cardView1, cardView2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.page_register);
M_UI.SetOffKeyboard(this);
M_Font.Initial(this);
_A = this;
_C = this;
Initial();
adsArrayList = new ArrayList<>();
adsArrayList.add(new Ads(R.drawable.a1));
adsArrayList.add(new Ads(R.drawable.a2));
adsArrayList.add(new Ads(R.drawable.a3));
adsArrayList.add(new Ads(R.drawable.a4));
adsArrayList.add(new Ads(R.drawable.a5));
adsArrayList.add(new Ads(R.drawable.a6));
adsArrayList.add(new Ads(R.drawable.a7));
adsArrayList.add(new Ads(R.drawable.a8));
adsArrayList.add(new Ads(R.drawable.a9));
adsArrayList.add(new Ads(R.drawable.a10));
adsArrayList.add(new Ads(R.drawable.a11));
adsArrayList.add(new Ads(R.drawable.a12));
adsArrayList.add(new Ads(R.drawable.a13));
adsArrayList.add(new Ads(R.drawable.a14));
adsArrayList.add(new Ads(R.drawable.a15));
adsArrayList.add(new Ads(R.drawable.a16));
adsArrayList.add(new Ads(R.drawable.a17));
adsArrayList.add(new Ads(R.drawable.a18));
adsArrayList.add(new Ads(R.drawable.a19));
adsArrayList.add(new Ads(R.drawable.a20));
adsArrayList.add(new Ads(R.drawable.a21));
//--------------------------------------------
adapter1 = new AdsAdapter(adsArrayList, this, _C, _A, recyclerView1, 0);
adapter2 = new Avatar2Adapter(adsArrayList, this, _C, _A, recyclerView2, 0);
RecyclerView.LayoutManager layoutManager1 = new GridLayoutManager(_C, 3);
RecyclerView.LayoutManager layoutManager2 = new GridLayoutManager(_C, 3);
recyclerView1.setLayoutManager(layoutManager1);
recyclerView2.setLayoutManager(layoutManager2);
recyclerView1.setAdapter(adapter1);
recyclerView2.setAdapter(adapter2);
}
public void Initial() {
recyclerView1 = (RecyclerView) findViewById(R.id.recycler_view1);
recyclerView2 = (RecyclerView) findViewById(R.id.recycler_view2);
}
}
和我的適配器：
public class AdsAdapter extends RecyclerView.Adapter<AdsAdapter.AdsViewHolder> {
private ArrayList<Ads> dataList;
Context _C1;
Activity _A1;
RecyclerView r;
int SelectedPos = 0;
int id_prev;
CardView CV_Prev = null;
public AdsAdapter(ArrayList<Ads> dataList, FragmentActivity activity, Context _C, Activity _A, RecyclerView recyclerView, int i) {
this.dataList = dataList;
_A1 = _A;
_C1 = _C;
r = recyclerView;
}
@Override
public AdsViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
final LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
final View view = layoutInflater.inflate(R.layout.avatars, parent, false);
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View SelectCardView) {
try {
if (CV_Prev != null) {
CV_Prev.findViewById(R.id.img_select).setVisibility(View.INVISIBLE);
}
SelectCardView.findViewById(R.id.img_select).setVisibility(View.VISIBLE);
CV_Prev = (CardView) SelectCardView;
} catch (Exception e) {
Toast.makeText(_C1, e.getMessage(), Toast.LENGTH_SHORT).show();
}
}
});
return new AdsViewHolder(view);
}
@Override
public void onBindViewHolder(AdsViewHolder holder, int position) {
holder.CV_item.setTag(position);
//------------------------------------------------------------------
holder.img_avatar.setImageResource(dataList.get(position).getImage());
}
@Override
public int getItemCount() {
return dataList.size();
}
class AdsViewHolder extends RecyclerView.ViewHolder {
ImageView img_avatar;
CardView CV_item;
AdsViewHolder(View itemView) {
super(itemView);
//-----------------------------------------------------------
img_avatar = (ImageView) itemView.findViewById(R.id.img_avatar);
CV_item = (CardView) itemView.findViewById(R.id.cardView);
}
}
}
我的觀點：
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/cardView"
android:layout_width="100dp"
android:layout_height="100dp"
android:background="#00ffffff"
android:layoutDirection="ltr"
android:paddingLeft="5dp"
android:paddingRight="5dp"
card_view:cardBackgroundColor="#B2EBF2"
card_view:cardCornerRadius="5dp"
card_view:cardElevation="5dp"
card_view:cardUseCompatPadding="true">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ImageView
android:id="@+id/img_avatar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#00ffffff"
card_view:srcCompat="@drawable/a1" />
<ImageView
android:id="@+id/img_select"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:visibility="invisible"
card_view:srcCompat="@mipmap/ic_check_circle_black_48dp" />
</RelativeLayout>
</android.support.v7.widget.CardView>
我的模型：
public class Ads {
private int image;
public Ads(int image)
{
this.image = image;
}
public void setImage(int image) {this.image = image;}
public int getImage() {return image;}
}
下圖顯示了我的意思是：
***我試圖設置ID爲每卡和圖像，並通過他們的ID選擇他們，但沒有幫助過。
RecyclerView回收其視圖。當你選擇一些東西的時候，爲選定的視圖的數據模型使用一些標誌，並在你的onBIndViewHolder中檢查該標誌是否爲真，然後顯示選定的UI，否則顯示。 –