我正在嘗試更改項(xiàng)目bgcolor的recyclerview值以及獲取該位置的值。我能夠獲取這些值并更改它們bgcolor，但我無法正確執(zhí)行它們。我面臨以下問題：1.第一個(gè)位置項(xiàng)目的背景總是改變：當(dāng)我點(diǎn)擊它時(shí)我想改變它。2.如果我能夠bgcolor相應(yīng)地更改，則不會(huì)獲取值。這是我的代碼：recyclerview 的適配器類public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyAd> {private static Clickitem clickitem;private ArrayList<String> names = new ArrayList<>();private Context context;private int row ;String defaulter;List<Item> items;boolean isSeleceted = false;private int selectedPosition = -1;private String onlygps, onlysid, onlygpsnew, onlygpsnewer;private SparseBooleanArray selectedItems = new SparseBooleanArray();@NonNull@Overridepublic MyAd onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) { View view = LayoutInflater.from(context).inflate(R.layout.list_recycler, viewGroup, false); return new MyAd(view);}MyAdapter(ArrayList<String> names, Context context) { this.names = names; this.context = context; clickitem = (Clickitem) context;}public static Clickitem getClickitem() { return clickitem;}public static void setClickitem(Clickitem clickitem) { MyAdapter.clickitem = clickitem;}@Overridepublic void onBindViewHolder(@NonNull final MyAd myAd, final int i) { String full = names.get(i); onlygps = full.substring(0, full.indexOf("/")); onlysid = full.substring(full.lastIndexOf("/") + 1); myAd.GPSname.setText(onlygps); myAd.logs.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { String full = names.get(i); onlygpsnew = full.substring(0, full.indexOf("/")); Intent intent = new Intent(context, LogsHistory.class); intent.putExtra("GPS", onlygpsnew); context.startActivity(intent); } }); if (row == i) { myAd.layout.setBackgroundColor(Color.YELLOW); } else { myAd.layout.setBackgroundColor(Color.WHITE); }}
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整數(shù)默認(rèn)值為 0，因此當(dāng)列表顯示時(shí)，您的行值將更改第一行的背景顏色。
您可以使用
private int row = -1 ;
代替
private int row ;
您還需要在用戶單擊行時(shí)更改行值。
myAd.layout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
...
row = myAd.adapterPosition();
notifyDataSetChanged();
另一種使用選擇器的方法是這樣的。我可以更具可讀性和簡單性。
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@color/blue" android:state_pressed="true"/>
<item android:drawable="@color/AliceBlue" android:state_focused="true"/>
<item android:drawable="@color/Azure"/>
</selector>
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