回收器查看单击并替换其他活动中的图像

Question

我对如何解决如何单击RecyclerView并从其他活动(例如MainActivity(更改图像的疑问有一些疑问。

在图像中，您可以看到我正在尝试做什么。我总共有 6 张图片，3 张小图片和另外 3 张大图片。

在 MainActivity 的页脚中，我有一个加载 3 个小图像的 ReciclerView，我希望当他们单击例如 image_Small_2/item_Small_2 时，用 image_Large_2/item_Large_2 替换位于中心的图像。

我不知道我是否很好地解释了自己，我给你留下一个截图和代码，看看你能不能帮我一把。提前谢谢。附言我使用滑行库来加载图像。

我的适配器回收器视图

public 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_Tamaño", String.valueOf(itemsLi.size()));
return itemsLi.size();
}
}

类项

public class Items {
private String xNombre_imagen;
public Items (String nombre_imagen_M){
xNombre_imagen = nombre_imagen_M;
}
public String getxNombre_imagen() {
return xNombre_imagen;
}
}

主活动

public class MainActivity extends AppCompatActivity {
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();
}
private void listadoXhead() {
ArrayList<Items> items = new ArrayList<>();
items.add(new Items("https://www.midominio.com/Imagen_Pequeña_head_01.jpg")); //IMAGE Small
items.add(new Items("https://www.midominio.com/Imagen_Pequeña_head_02.jpg")); //IMAGE Small
items.add(new Items("https://www.midominio.com/Imagen_Pequeña_head_03.jpg")); //IMAGE Small
idRecyclerView.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(MainActivity.this);
((LinearLayoutManager) layoutManager).setOrientation(RecyclerView.HORIZONTAL);
adapter = new AdaptadorX(items, MainActivity.this);
idRecyclerView.setLayoutManager(layoutManager);
idRecyclerView.setAdapter(adapter);
}
}

activity_main

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<ImageView
android:id="@+id/idImgHead"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
android:scaleType="fitCenter"
app:layout_constraintBottom_toTopOf="@+id/linearLayout"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="@mipmap/ic_launcher" />
<LinearLayout
android:id="@+id/linearLayout"
android:layout_width="0dp"
android:layout_height="100dp"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
android:orientation="vertical"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/idRecyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

activity_item

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/idImagen"
android:layout_width="100dp"
android:layout_height="100dp"
android:src="@drawable/ic_launcher_foreground"
android:onClick="accionBoton"/>
</LinearLayout>

示例图像在此处

Answer 1

您需要在活动中实现接口侦听器并将其传递给适配器。将其添加到适配器并通过构造函数传递

interface OnImageClickListener{
void onSelected(String url);
}

您的整个适配器应如下所示。

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_Tamaño", String.valueOf(itemsLi.size()));
return itemsLi.size();
}

}

在活动中，实现此接口并将其传递给适配器。

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_Pequeña_head_01.jpg")); //IMAGE Small
items.add(new Items("https://www.midominio.com/Imagen_Pequeña_head_02.jpg")); //IMAGE Small
items.add(new Items("https://www.midominio.com/Imagen_Pequeña_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);
}

}