Android应用程序检索数据从API（模型到活动）

问题描述：

我正在制作一个鸡尾酒的Android应用程序。Android应用程序检索数据从API（模型到活动）

我搜索鸡尾酒的名字，然后收到我使用的API中所有鸡尾酒的列表视图。我点击列表视图中的项目（鸡尾酒），然后在新活动（名为CocktailDisplay）中显示鸡尾酒（名称，缩略图，配料等）的信息。我通过意向传递SearchCocktail活动中的鸡尾酒的名称。从那里，我只是在CocktailDisplay中显示该文本。

我想从显示鸡尾酒的图像和名称开始。

我遇到了麻烦，新的帮助，访问模型以获取缩略图所需的信息以及最终的成分和其他信息。

我是新来的android开发，所以我不知道我是否在正确的道路上。

在此先感谢！这是我的代码。

SearchActivity.java（通过部分数据到CocktailDisplay.java）

 ListView1.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
     @Override 
     public void onItemClick(AdapterView<?> arg0, View v, int position, long id) { 
      DrinkRecipeModel value = (DrinkRecipeModel) ListView1.getItemAtPosition(position); 
      // selected item 
      String cocktail = value.getDrinkName(); 
      Intent myIntent = new Intent(getApplicationContext(), CocktailDisplay.class); 
      // sending data to new activity 
      myIntent.putExtra("selected-item", cocktail); 
      startActivity(myIntent); 

     } 
    });

DrinkRecipeModel.java

import com.google.gson.annotations.SerializedName; 

import java.util.ArrayList; 


public class DrinkRecipeModel { 
    @SerializedName("idDrink") 
    private int drinkId; 

    @SerializedName("strDrink") 
    private String drinkName; 

    @SerializedName("categories") 
    private String drinkCategories; 

    @SerializedName("strDrinkThumb") 
    private String drinkThumb; 

    @SerializedName("ingredients") 
    private ArrayList<String> ingredients; 

    public int getDrinkId() { 
     return drinkId; 
    } 

    public String getDrinkName(){ 
     return drinkName; 
    } 

    public String getDrinkCategories(){ 
     return drinkCategories; 
    } 

    public String getDrinkThumb(){ 
     return drinkThumb; 
    } 

    public ArrayList<String> getIngredients() { return ingredients; } 


    public void setDrinkId(int drinkId) { this.drinkId = drinkId; } 

    public void setDrinkName(String drinkName) { this.drinkName = drinkName; } 

    public void setDrinkCategories(String drinkCategories) { 
     this.drinkCategories = drinkCategories; 
    } 

    public void setDrinkThumb(String drinkThumb) { 
     this.drinkThumb = drinkThumb; 
    } 

    public void setIngredients(ArrayList<String> ingredients) { 
     this.ingredients = ingredients; 
    } 
}

activity_cocktail_display.xml

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:paddingBottom="@dimen/activity_vertical_margin" 
    android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    tools:context=".CocktailDisplayActivity" > 

<ImageView 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:id="@+id/cocktailImage" 
    android:layout_alignParentTop="true" 
    android:layout_centerInParent="true" 
    android:layout_centerHorizontal="true" 
    android:maxHeight="80dp" 
    android:maxWidth="80dp" 
    android:minHeight="10dp" 
    android:minWidth="10dp" /> 

<TextView 
    android:id="@+id/cocktailName" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_below="@+id/cocktailImage" 
    android:textStyle="bold" 
    android:layout_centerInParent="true" /> 

</RelativeLayout>

CocktailDisplay.java

public class CocktailDisplay extends Activity { 
    TextView cocktailName; 
    ImageView cocktailImage; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_cocktail_display); 

    cocktailName = (TextView) findViewById(R.id.cocktailName); 
    cocktailImage = (ImageView) findViewById(R.id.cocktailImage); 

    // get the intent from which this activity is called. 
    Intent intent = getIntent(); 

    // ***** Trying to access model data here...not happy ***** 
    DrinkRecipeModel recipe = *not sure how to call*; 


    // fetch value from key-value pair and make it visible on TextView. 
    String item = intent.getStringExtra("selected-item"); 
    cocktailName.setText(item); 


    // fetch value from key-value pair and make it visible on ImageView. 
    // ***** Trying to access thumbnail here...not happy ***** 
    cocktailImage.setImageResource(recipe.getDrinkId()); 

} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.menu_cocktail_display, menu); 
    return true; 
} 

}

您是否从Webservice获得响应？ – KishuDroid

答

一个选项可以让您的自定义类实现Serializable接口，然后您可以使用意图＃putExtra（）方法的putExtra（Serializable ..）变体传递意图额外的对象实例。 try this link

答

使用这个美好的网站= http://www.parcelabler.com/

有，粘贴“的模式类的代码和输出，你会得到这样的事情 -

import com.google.gson.annotations.SerializedName; 
import java.util.ArrayList; 

public class DrinkRecipeModel implements Parcelable { 
@SerializedName("idDrink") 
private int drinkId; 

@SerializedName("strDrink") 
private String drinkName; 

@SerializedName("categories") 
private String drinkCategories; 

@SerializedName("strDrinkThumb") 
private String drinkThumb; 

@SerializedName("ingredients") 
private ArrayList<String> ingredients; 

public int getDrinkId() { 
    return drinkId; 
} 

public String getDrinkName(){ 
    return drinkName; 
} 

public String getDrinkCategories(){ 
    return drinkCategories; 
} 

public String getDrinkThumb(){ 
    return drinkThumb; 
} 

public ArrayList<String> getIngredients() { return ingredients; } 


public void setDrinkId(int drinkId) { this.drinkId = drinkId; } 

public void setDrinkName(String drinkName) { this.drinkName = drinkName; } 

public void setDrinkCategories(String drinkCategories) { 
    this.drinkCategories = drinkCategories; 
} 

public void setDrinkThumb(String drinkThumb) { 
    this.drinkThumb = drinkThumb; 
} 

public void setIngredients(ArrayList<String> ingredients) { 
    this.ingredients = ingredients; 
} 

protected DrinkRecipeModel(Parcel in) { 
    drinkId = in.readInt(); 
    drinkName = in.readString(); 
    drinkCategories = in.readString(); 
    drinkThumb = in.readString(); 
    if (in.readByte() == 0x01) { 
     ingredients = new ArrayList<String>(); 
     in.readList(ingredients, String.class.getClassLoader()); 
    } else { 
     ingredients = null; 
    } 
} 

@Override 
public int describeContents() { 
    return 0; 
} 

@Override 
public void writeToParcel(Parcel dest, int flags) { 
    dest.writeInt(drinkId); 
    dest.writeString(drinkName); 
    dest.writeString(drinkCategories); 
    dest.writeString(drinkThumb); 
    if (ingredients == null) { 
     dest.writeByte((byte) (0x00)); 
    } else { 
     dest.writeByte((byte) (0x01)); 
     dest.writeList(ingredients); 
    } 
} 

@SuppressWarnings("unused") 
public static final Parcelable.Creator<DrinkRecipeModel> CREATOR = new Parcelable.Creator<DrinkRecipeModel>() { 
    @Override 
    public DrinkRecipeModel createFromParcel(Parcel in) { 
     return new DrinkRecipeModel(in); 
    } 

    @Override 
    public DrinkRecipeModel[] newArray(int size) { 
     return new DrinkRecipeModel[size]; 
    } 
};

现在用上述取代你的模型类的代码代码，你的模型类不是“可分类的”。因此，你现在可以使用 -

myIntent.putExtra("receipe_item", drinkReceipeOBjectWhichIsParcelableNow);

，您可以取回下一个活动显示。

Android应用程序检索数据从API（模型到活动）

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