JSON文字列を使用してサーバーから関心のあるポイントをダウンロードするAndroid用のアプリを開発しています。すべてが正常に機能していましたが、4.2.1でテストを開始してから、次のエラーが発生しました。
01-28 15:32:14.167: E/AndroidRuntime(31174): FATAL EXCEPTION: AsyncTask #1
01-28 15:32:14.167: E/AndroidRuntime(31174): java.lang.RuntimeException: An error occured while executing doInBackground()
01-28 15:32:14.167: E/AndroidRuntime(31174): at android.os.AsyncTask$3.done(AsyncTask.java:299)
01-28 15:32:14.167: E/AndroidRuntime(31174): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352)
01-28 15:32:14.167: E/AndroidRuntime(31174): at java.util.concurrent.FutureTask.setException(FutureTask.java:219)
01-28 15:32:14.167: E/AndroidRuntime(31174): at java.util.concurrent.FutureTask.run(FutureTask.java:239)
01-28 15:32:14.167: E/AndroidRuntime(31174): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
01-28 15:32:14.167: E/AndroidRuntime(31174): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
01-28 15:32:14.167: E/AndroidRuntime(31174): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
01-28 15:32:14.167: E/AndroidRuntime(31174): at java.lang.Thread.run(Thread.java:856)
01-28 15:32:14.167: E/AndroidRuntime(31174): Caused by: java.lang.StackOverflowError
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:371)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:375)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:380)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:375)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:380)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:375)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:380)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:375)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:380)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:375)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:380)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:375)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:380)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:375)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:380)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:375)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:380)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:375)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:380)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:375)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:380)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:375)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:380)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:375)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:380)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:375)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:380)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.$Gson$Types.resolve($Gson$Types.java:355)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:117)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:72)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.Gson.getAdapter(Gson.java:353)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.<init>(ReflectiveTypeAdapterFactory.java:82)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:81)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:118)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:72)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.Gson.getAdapter(Gson.java:353)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.<init>(ReflectiveTypeAdapterFactory.java:82)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:81)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:118)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:72)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.Gson.getAdapter(Gson.java:353)
01-28 15:32:14.167: E/AndroidRuntime(31174): at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.<init>(ReflectiveTypeAdapterFactory.java:
奇妙なことに、私が試した他のすべてのバージョンで正常に動作します...
これが私がクラッシュしていると思う行です:
Gson g = new Gson();
JSONResponse jsonResponse = g.fromJson(serverReply, JSONResponse.class); <---
そして私が作成しようとしているクラス:
/**
* The JSONResponse from the server
* @author Tom
*
*/
public class JSONResponse {
private String status;
private PointOfInterest result;
/**
* Creates a JSONResponse object
* @param json
* @return
*/
static JSONResponse convertJSONToResponse(String json){
Gson gson = new Gson();
JSONResponse jsonResponse = gson.fromJson(json, JSONResponse.class);
return jsonResponse;
}
/**
* Get Point of Interest
*/
public PointOfInterest getPointofInterest(){
return result;
}
public String getStatus(){
return status;
}
/**
* Get PrivateSection, area we can put our own data
*/
/*
public String getPrivateSection(){
return privateSection;
}
*/
/**
* Creates a JSONResponse object
* @param json
* @return
*/
String convertJSONResponseToJSON(){
Gson gson = new Gson();
return gson.toJson(this);
}
}
私がここで採用したひどいデザインパターンを知っていることに注意してください。このアプリケーションは、私が大学で受講しているモバイルアプリクラス用です。
編集 gsonを1.7.1にダウングレードするとうまくいきます。