图像正在 RecipeApiActivity 中下载 - 我可以在名为“imigiview”的测试 ImageView 中看到它们，因此 API 请求有效!但我希望它们在回收器 View 中正确显示 - 现在它什么也不显示。
为此，我创建了一个位图列表，其中放置了所有下载的位图，该列表被提供给应该将它们放置在 RecyclerView 中的 RecipeAPIAdapter。
你能帮我找出为什么图像不显示吗？ ( Logcat 没有给我任何类型的错误)
package byDragosT.myapplication;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.widget.ImageView;
import android.widget.TextView;
import com.squareup.okhttp.Callback;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.Response;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Map;
// Aceasta activitate detine o lista de retete gasita pe spoontacular bagata in recyclerview//
// Va lua un RecipeItem si il va baga in RecipeApiAdapter si apoi il conecteaza la recyclerview
public class RecipeAPIActivity extends AppCompatActivity {
private RecyclerView recyclerView;
private RecyclerView.LayoutManager layoutManager;
private RecipeApiAdapter adapter;
// private TextView jsonUnparsedResult;
private ImageView imigiView;
private ArrayList<Bitmap> images = new ArrayList<>(8);
private Context context;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_recipe_api);
String url1 = "flour"; // just for simplifying the stackOverflow question I put this value here
String url2 = "egg"; // just for simplifying the stackOverflow question I put this value here
String url3 = "salt"; // just for simplifying the stackOverflow question I put this value here
String urlfinal = "https://spoonacular-recipe-food-nutrition-v1.p.rapidapi.com/recipes/findByIngredients?number=5&ranking=1&ignorePantry=false&ingredients=" + url1 + url2 + url3;
System.out.println(urlfinal);
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url(urlfinal)
.get()
.addHeader("x-rapidapi-host", "spoonacular-recipe-food-nutrition-v1.p.rapidapi.com")
.addHeader("x-rapidapi-key", "key hidden")
.build();
client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Request request, IOException e) {
e.printStackTrace();
}
@Override
public void onResponse(final Response response) throws IOException {
if (response.isSuccessful()){
//Aici inca suntem pe background thread - metoda enqueue -- //
final String myResponse;
myResponse = response.body().string();
// Aici trecem pe threadul principal din nou //
RecipeAPIActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
// jsonUnparsedResult.setText(myResponse);
System.out.println(myResponse);
try {
JSONArray results = new JSONArray(myResponse);
if(results.length() > 0){
for (int i = 0; i < results.length(); i++){
JSONObject object = results.getJSONObject(i);
// jsonUnparsedResult.setText(object.getString("title"));
System.out.println(object.getString("image"));
// SPRITES
String imgUrl = object.getString("image"); // aici sprites e Obiect cu 8 perechi key-values
new DownloadSpriteTask().execute(imgUrl);
}
}
} catch (JSONException e) { e.printStackTrace(); }
}
});
}
}
});
imigiView = findViewById(R.id.imaginedetest); // on post execute at Asynktask
recyclerView = findViewById(R.id.recyclerView);
layoutManager = new LinearLayoutManager(context);
recyclerView.setLayoutManager(layoutManager);
// System.out.println("ce se intampla" + images);
adapter = new RecipeApiAdapter(images);
recyclerView.setAdapter(adapter);
// jsonUnparsedResult = findViewById(R.id.JsonExample);
}
private class DownloadSpriteTask extends AsyncTask<String, Void, Bitmap> {
@Override
protected Bitmap doInBackground(String... strings) {
try {
URL url = new URL(strings[0]);
return BitmapFactory.decodeStream(url.openStream());
} catch (IOException e) {
Log.e("cs50", "Download sprite error", e);
return null;
}
}
@Override
protected void onPostExecute(Bitmap bitmap) {
imigiView.setImageBitmap(bitmap);
images.add(bitmap); /// images e facut sa ia int ca valoare nu Bitmap
System.out.println("Another photo attached!");
}
}
/// Ingredients should be comma separated //// symbol for ',' is %252C
//// symbol for space ' ' is %20 //
public String urlify (String ingredient, String vitamina){
String theUrl = "";
if (ingredient.equals("Choose a " + vitamina + " ingredient")){
System.out.println("VA RUGAM sa introduceti ceva ok !!!!!!!!!!");
ingredient = "";
}else{
String[] splitResult = ingredient.split(" ",8);
for (String word:splitResult){
if (word.equals("-")){
theUrl = theUrl + "%252C";
break;
}else theUrl = theUrl + word + "%20";
}
}
return theUrl;
}
}
食谱API适配器
package byDragosT.myapplication;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import java.util.ArrayList;
import java.util.List;
public class RecipeApiAdapter extends RecyclerView.Adapter<RecipeApiAdapter.RecipeViewHolder> {
private ArrayList<Bitmap> images;
public RecipeApiAdapter(ArrayList<Bitmap> images){
this.images = images;
}
public static class RecipeViewHolder extends RecyclerView.ViewHolder {
public ImageView pozaReteta;
public TextView titlu;
public TextView descriere;
RecipeViewHolder(View view){
super(view);
pozaReteta = view.findViewById(R.id.poza);
titlu = view.findViewById(R.id.recipe_name);
descriere = view.findViewById(R.id.ingredients_list);
}
}
@NonNull
@Override //// Mare grija ce layout pui aici - sfat pentru viitor - mi-a luat 4 ore sa gasesc eroarea
public RecipeViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recipe_item_in_recyclerview_api, parent, false);
RecipeViewHolder recipeViewHolder = new RecipeViewHolder(view);
return recipeViewHolder;
}
@Override
public void onBindViewHolder(@NonNull RecipeViewHolder holder, int position) {
Bitmap image_id = images.get(position);
holder.pozaReteta.setImageBitmap(image_id);
holder.titlu.setText("Image: "+ position);
}
@Override
public int getItemCount() {
return images.size();
}
}
activity_recipe_api.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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=".RecipeAPIActivity">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical" />
<TextView
android:id="@+id/JsonExample"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_marginEnd="150dp"
android:layout_marginBottom="8dp"
android:text="Testing testing 123"
android:background="@color/colorPrimaryDark"
android:textColor="@android:color/background_light"
app:layout_constraintStart_toEndOf="@+id/recyclerView" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imaginedetest"
android:contentDescription="@string/imagine_de_test" />
</RelativeLayout>
recipe_item_in_recyclerview_api.xml
<?xml version="1.0" encoding="utf-8"?>
<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="wrap_content"
android:orientation="vertical"
android:padding="10dp">
<ImageView
android:id="@+id/poza"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="4dp"
android:layout_marginEnd="2dp"
android:paddingTop="10dp"
app:layout_constraintEnd_toStartOf="@+id/ingredients_list"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:srcCompat="@android:drawable/sym_def_app_icon" />
<TextView
android:id="@+id/recipe_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="10dp"
android:text="@string/mankarika_super"
android:textAlignment="center"
android:textSize="18sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.52"
app:layout_constraintStart_toEndOf="@+id/poza"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/ingredients_list"
android:layout_width="250dp"
android:layout_height="wrap_content"
android:paddingTop="5dp"
android:text="Se face din: ceapa, apa, si multe multe multe multe multe multe multe multe multe multe multe multe chestii"
android:textAlignment="gravity"
android:textSize="12sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/poza"
app:layout_constraintTop_toBottomOf="@+id/recipe_name" />
</androidx.constraintlayout.widget.ConstraintLayout>
最佳答案
关于java - 如何在 Android Studio 的 Recyclerview 中显示从 API 获取的 JPG 图像？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/62300736/