存儲對象

Question

可能重複：
GSON throwing 「Expected BEGIN_OBJECT but was BEGIN_ARRAY」?

我試圖存儲在Android的對象，但我有一個問題，閱讀

我的目標

public class User { 
    private String login; 
    private String password; 

    public User(String login, String password){ 
     this.login = login; 
     this.password = password; 
    } 

    public String getLogin(){ 
     return this.login; 
    } 
} 

保存我的對象在內部存儲設備

String FILENAME = getString(R.string.store); 

User storeUser = new User(user.getText().toString(), password.getText().toString()); 

Gson gson = new Gson(); 

String data = gson.toJson(storeUser); 

JSONArray mJSONArray = new JSONArray(Arrays.asList(data)); 

String string = mJSONArray.toString(); 

FileOutputStream fos; 
fos = openFileOutput(FILENAME, Context.MODE_PRIVATE); 
fos.write(string.getBytes()); 
fos.close(); 

我嘗試讀取

String FILENAME = getString(R.string.store); 

FileInputStream fis; 

fis = openFileInput(FILENAME); 

InputStreamReader inputStreamReader = new InputStreamReader(fis); 
BufferedReader bufferedReader = new BufferedReader(inputStreamReader); 
StringBuilder sb = new StringBuilder(); 
String line; 
while ((line = bufferedReader.readLine()) != null) { 
    sb.append(line); 
} 

System.out.println(sb.toString()); 

Gson gson = new Gson(); 

User user = gson.fromJson(sb.toString(), User.class); 

System.out.println(user.getLogin()); 

而且我有

01-12 14:06:36.703: I/System.out(30366): [" {\"login\":\"username2\",\"password\":\"password\"}"] 
01-12 14:06:36.753: D/AndroidRuntime(30366): Shutting down VM 
01-12 14:06:36.753: W/dalvikvm(30366): threadid=1: thread exiting with uncaught exception (group=0x400205a0) 
01-12 14:06:36.753: E/AndroidRuntime(30366): FATAL EXCEPTION: main 
01-12 14:06:36.753: E/AndroidRuntime(30366): com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 2 
01-12 14:06:36.753: E/AndroidRuntime(30366): at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:176) 
01-12 14:06:36.753: E/AndroidRuntime(30366): at com.google.gson.Gson.fromJson(Gson.java:795) 
01-12 14:06:36.753: E/AndroidRuntime(30366): at com.google.gson.Gson.fromJson(Gson.java:761) 
01-12 14:06:36.753: E/AndroidRuntime(30366): at com.google.gson.Gson.fromJson(Gson.java:710) 
01-12 14:06:36.753: E/AndroidRuntime(30366): at com.google.gson.Gson.fromJson(Gson.java:682) 
01-12 14:06:36.753: E/AndroidRuntime(30366): at ant.junior.geoloc.MainActivity$1.onClick(MainActivity.java:65) 
01-12 14:06:36.753: E/AndroidRuntime(30366): at android.view.View.performClick(View.java:2532) 
01-12 14:06:36.753: E/AndroidRuntime(30366): at android.view.View$PerformClick.run(View.java:9293) 
01-12 14:06:36.753: E/AndroidRuntime(30366): at android.os.Handler.handleCallback(Handler.java:587) 
01-12 14:06:36.753: E/AndroidRuntime(30366): at android.os.Handler.dispatchMessage(Handler.java:92) 
01-12 14:06:36.753: E/AndroidRuntime(30366): at android.os.Looper.loop(Looper.java:150) 
01-12 14:06:36.753: E/AndroidRuntime(30366): at android.app.ActivityThread.main(ActivityThread.java:4277) 
01-12 14:06:36.753: E/AndroidRuntime(30366): at java.lang.reflect.Method.invokeNative(Native Method) 
01-12 14:06:36.753: E/AndroidRuntime(30366): at java.lang.reflect.Method.invoke(Method.java:507) 
01-12 14:06:36.753: E/AndroidRuntime(30366): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
01-12 14:06:36.753: E/AndroidRuntime(30366): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
01-12 14:06:36.753: E/AndroidRuntime(30366): at dalvik.system.NativeStart.main(Native Method) 
01-12 14:06:36.753: E/AndroidRuntime(30366): Caused by: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 2 
01-12 14:06:36.753: E/AndroidRuntime(30366): at com.google.gson.stream.JsonReader.expect(JsonReader.java:339) 
01-12 14:06:36.753: E/AndroidRuntime(30366): at com.google.gson.stream.JsonReader.beginObject(JsonReader.java:322) 
01-12 14:06:36.753: E/AndroidRuntime(30366): at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:165) 
01-12 14:06:36.753: E/AndroidRuntime(30366): ... 16 more 

感謝

Answer 1

OK，我發現了錯誤，編碼2次。