RuntimeException：アクティビティを開始できませんComponentInfo、NotFoundException

Question

この基本的な例でRetrofit 2を学習しようとしています。また、シリアライズ可能なデータをアクティビティからアクティビティに渡す際に問題が発生しました...

理由はありますか？

これは私のコードです。

logcat：

05-24 00:21:46.215 18156-18156/com.krystian.weatherapp E/AndroidRuntime: FATAL EXCEPTION: main 
Process: com.krystian.weatherapp, PID: 18156 
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.krystian.weatherapp/com.krystian.flowerapp.ui.DetailActivity}: android.content.res.Resources$NotFoundException: String resource ID 
#0x2 
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2379) 
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2442) 
    at android.app.ActivityThread.access$800(ActivityThread.java:156) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1351) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:211) 
    at android.app.ActivityThread.main(ActivityThread.java:5373) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:372) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1020) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:815) 
Caused by: android.content.res.Resources$NotFoundException: String resource ID #0x2 
    at android.content.res.Resources.getText(Resources.java:340) 
    at android.support.v7.widget.ResourcesWrapper.getText(ResourcesWrapper.java:52) 
    at android.widget.TextView.setText(TextView.java:4171) 
    at com.krystian.flowerapp.ui.DetailActivity.setData(DetailActivity.java:52) 
    at com.krystian.flowerapp.ui.DetailActivity.onCreate(DetailActivity.java:47) 
    at android.app.Activity.performCreate(Activity.java:5990) 
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106) 
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2332) 
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2442)  
    at android.app.ActivityThread.access$800(ActivityThread.java:156)  
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1351)  
    at android.os.Handler.dispatchMessage(Handler.java:102)  
    at android.os.Looper.loop(Looper.java:211)  
    at android.app.ActivityThread.main(ActivityThread.java:5373)  
    at java.lang.reflect.Method.invoke(Native Method)  
    at java.lang.reflect.Method.invoke(Method.java:372)  
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1020)  
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:815) 

MainActivity.java：

package com.krystian.flowerapp.ui; 

import android.content.Intent; 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.LinearLayoutManager; 
import android.support.v7.widget.RecyclerView; 
import android.util.Log; 

import com.krystian.flowerapp.R; 
import com.krystian.flowerapp.adapter.FlowerAdapter; 
import com.krystian.flowerapp.controller.RestManager; 
import com.krystian.flowerapp.helper.Constants; 
import com.krystian.flowerapp.model.Flower; 

import java.util.List; 

import butterknife.BindView; 
import butterknife.ButterKnife; 
import retrofit2.Call; 
import retrofit2.Callback; 
import retrofit2.Response; 

public class MainActivity extends AppCompatActivity implements FlowerAdapter.FlowerClickListener { 
@BindView(R.id.recyclerView) 
RecyclerView recyclerView; 

private RestManager mRestManager; 
private FlowerAdapter mFlowerAdapter; 

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

    ButterKnife.bind(this); 

    configViews(); 

    mRestManager = new RestManager(); 
    Call<List<Flower>> listCall = mRestManager.getFlowerService().getAllFlowers(); 
    listCall.enqueue(new Callback<List<Flower>>() { 
     @Override 
     public void onResponse(Call<List<Flower>> call, Response<List<Flower>> response) { 
      if (response.isSuccessful()) { 
       List<Flower> flowerList = response.body(); 

       for (int i=0; i < flowerList.size(); i++) { 
        Flower flower = flowerList.get(i); 
        mFlowerAdapter.addFlower(flower); 
       } 
      } else { 
       int ac = response.code(); 
       Log.e("Response code", String.valueOf(ac)); 
      } 
     } 

     @Override 
     public void onFailure(Call<List<Flower>> call, Throwable t) { 

     } 
    }); 
} 

private void configViews() { 
    recyclerView.setHasFixedSize(true); 
    recyclerView.setRecycledViewPool(new RecyclerView.RecycledViewPool()); 
    recyclerView.setLayoutManager(new LinearLayoutManager(getApplicationContext(), LinearLayoutManager.VERTICAL, false)); 

    mFlowerAdapter = new FlowerAdapter(this); 

    recyclerView.setAdapter(mFlowerAdapter); 
} 

@Override 
public void onClick(int position) { 
    Flower selectedFlower = mFlowerAdapter.getSelectedFlower(position); 
    Intent intent = new Intent(MainActivity.this, DetailActivity.class); 
    intent.putExtra(Constants.REFERENCE.FLOWER, selectedFlower); 
    startActivity(intent); 
} 
} 

DetailActivity.java：

package com.krystian.flowerapp.ui; 

import android.content.Intent; 
import android.os.Bundle; 
import android.support.annotation.Nullable; 
import android.support.v7.app.AppCompatActivity; 
import android.widget.ImageView; 
import android.widget.TextView; 

import com.krystian.flowerapp.R; 
import com.krystian.flowerapp.helper.Constants; 
import com.krystian.flowerapp.model.Flower; 
import com.squareup.picasso.Picasso; 

import butterknife.BindView; 
import butterknife.ButterKnife; 

/** 
* Created by: Krystian 
* Date: 23.05.2016. 
*/ 

public class DetailActivity extends AppCompatActivity { 
@BindView(R.id.photoImageView) 
ImageView photoImageView; 
@BindView(R.id.nameTextView) 
TextView nameTextView; 
@BindView(R.id.idTextView) 
TextView idTextView; 
@BindView(R.id.categoryTextView) 
TextView categoryTextView; 
@BindView(R.id.priceTextView) 
TextView priceTextView; 
@BindView(R.id.instructionsTextView) 
TextView instructionsTextView; 

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

    ButterKnife.bind(this); 

    Intent intent = getIntent(); 
    Flower flower = (Flower) intent.getSerializableExtra(Constants.REFERENCE.FLOWER); 

    setData(flower); 
} 

private void setData(Flower flower) { 
    nameTextView.setText(flower.getName()); 
    idTextView.setText(flower.getProductId()); 
    categoryTextView.setText(flower.getCategory()); 
    priceTextView.setText(String.valueOf(flower.getPrice())); 
    instructionsTextView.setText(flower.getInstructions()); 

    Picasso 
      .with(getApplicationContext()) 
      .load(Constants.HTTP.PHOTO_URL + flower.getPhoto()) 
      .into(photoImageView); 
} 
} 

のAndroidManifest.xml：

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.krystian.flowerapp"> 

<uses-permission android:name="android.permission.INTERNET" /> 
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 

<application 
    android:allowBackup="true" 
    android:icon="@mipmap/ic_launcher" 
    android:label="@string/app_name" 
    android:supportsRtl="true" 
    android:theme="@style/AppTheme"> 
    <activity android:name="com.krystian.flowerapp.ui.MainActivity"> 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 

      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
    <activity android:name="com.krystian.flowerapp.ui.DetailActivity" /> 
</application> 

Answer 1

問題の原因となっている行がDetailActivityにライン52上にある：

idTextView.setText(flower.getProductId()); 

setTextの宣言がある：

ボイドのsetText（残油をINT）

ヒントはパラメータ名にあり、flower.getProductId()が渡されたときのリソースIDです。ビューのsetTextメソッドでは、res/strings.xmlの文字列リソース、または文字列リソースを示す識別子がintであると想定していました。そして、リソースIDとflowerクラスの実際のゲッター/メソッドgetProductId()との間で混乱が生じました。

StringクラスのvalueOfメソッドを使用すると、flowerクラスの製品IDを文字列型に変換することが最も簡単に解決できます。

idTextView.setText(String.valueOf(flower.getProductId()));