我對(duì)如何解決有關(guān)如何單擊 RecyclerView 并從另一個(gè)活動(dòng)（例如 MainActivity）更改圖像的疑問有一些疑問。在圖片中你可以看到我正在嘗試做什么。我總共有 6 張圖像，3 張小圖像和另外 3 張大圖像。在 MainActivity 的頁(yè)腳中，我有 ReciclerView 加載 3 個(gè)小圖像，我希望當(dāng)它們單擊 image_Small_2/item_Small_2 時(shí)，將中間的圖像替換為 image_Large_2/item_Large_2。我不知道我是否解釋得很好，我給你留下了截圖和代碼，看看你是否可以幫助我。提前致謝。PS 我使用 glide 庫(kù)來(lái)加載圖像。我的適配器 RecyclerViewpublic class AdaptadorX extends RecyclerView.Adapter<AdaptadorX.ViewHolder> { private ArrayList<Items> itemsLi; private Context context; public static class ViewHolder extends RecyclerView.ViewHolder{ public ImageView idSrcImagen; public ViewHolder(@NonNull View itemView) { super(itemView); idSrcImagen = itemView.findViewById(R.id.idImagen); } } public AdaptadorX(ArrayList<Items> itemsListado, Context context_L){ itemsLi = itemsListado; context = context_L; } @NonNull @Override public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_item, parent, false); ViewHolder content = new ViewHolder(view); return content; } @Override public void onBindViewHolder(@NonNull final ViewHolder holder, final int position) { final Items contarItems = itemsLi.get(position); Glide.with(context).load(contarItems.getxNombre_imagen()).into(holder.idSrcImagen); holder.idSrcImagen.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Log.d("Mensaje_AdaptadorX.java", "Mi Posicion FOTO es: "+String.valueOf(position)); } }); } @Override public int getItemCount() { Log.d("Mensaje_Size_Tama?o", String.valueOf(itemsLi.size())); return itemsLi.size(); }}
1 回答
慕虎7371278
TA貢獻(xiàn)1802條經(jīng)驗(yàn) 獲得超4個(gè)贊
您需要在活動(dòng)中實(shí)現(xiàn)接口偵聽器并將其傳遞給適配器。將其添加到您的適配器并通過構(gòu)造函數(shù)傳遞它
interface OnImageClickListener{
void onSelected(String url);
}
您的整個(gè)適配器應(yīng)該如下所示。
public class AdaptadorX extends RecyclerView.Adapter<AdaptadorX.ViewHolder> {
private ArrayList<Items> itemsLi;
private Context context;
pruvate OnImageClickListener listener;
interface OnImageClickListener{
void onSelected(String url);
}
public static class ViewHolder extends RecyclerView.ViewHolder{
public ImageView idSrcImagen;
public ViewHolder(@NonNull View itemView) {
super(itemView);
idSrcImagen = itemView.findViewById(R.id.idImagen);
}
}
public AdaptadorX(ArrayList<Items> itemsListado, Context context_L, OnImageClickListener listener){
itemsLi = itemsListado;
context = context_L;
this.listener = listener;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_item, parent, false);
ViewHolder content = new ViewHolder(view);
return content;
}
@Override
public void onBindViewHolder(@NonNull final ViewHolder holder, final int position) {
final Items contarItems = itemsLi.get(position);
Glide.with(context).load(contarItems.getxNombre_imagen()).into(holder.idSrcImagen);
holder.idSrcImagen.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
listener.onSelected(contarItems.getxNombre_imagen())
}
});
}
@Override
public int getItemCount() {
Log.d("Mensaje_Size_Tama?o", String.valueOf(itemsLi.size()));
return itemsLi.size();
}
}
在您的 Activity 中，您實(shí)現(xiàn)此接口并將其傳遞給適配器。
public class MainActivity extends AppCompatActivity implements OnImageClickListener {
public ImageView idImgHead;
private ArrayList<Items> items;
private RecyclerView idRecyclerView;
private RecyclerView.Adapter adapter;
private RecyclerView.LayoutManager layoutManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
idRecyclerView = findViewById(R.id.idRecyclerView);
idImgHead = findViewById(R.id.idImgHead);
Glide.with(this).load("https://www.midominio.com/Imagen_GRANDE_head_01.jpg").into(idImgHead); //IMAGE BIG
listadoXhead();
}
@Override
public onSelected(String url) {
Glide.with(this).load(url).into(idImgHead);
}
private void listadoXhead() {
ArrayList<Items> items = new ArrayList<>();
items.add(new Items("https://www.midominio.com/Imagen_Peque?a_head_01.jpg")); //IMAGE Small
items.add(new Items("https://www.midominio.com/Imagen_Peque?a_head_02.jpg")); //IMAGE Small
items.add(new Items("https://www.midominio.com/Imagen_Peque?a_head_03.jpg")); //IMAGE Small
idRecyclerView.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(MainActivity.this);
((LinearLayoutManager) layoutManager).setOrientation(RecyclerView.HORIZONTAL);
adapter = new AdaptadorX(items, MainActivity.this, this);
idRecyclerView.setLayoutManager(layoutManager);
idRecyclerView.setAdapter(adapter);
}
}
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