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POstore objects in android gson
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  1. POstore objects in android gson
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    copied!<blockquote> <p><strong>Possible Duplicate:</strong><br> <a href="https://stackoverflow.com/questions/9598707/gson-throwing-expected-begin-object-but-was-begin-array">GSON throwing “Expected BEGIN_OBJECT but was BEGIN_ARRAY”?</a> </p> </blockquote> <p>I'm trying to store objects in android but I have a reading problem</p> <p>My object</p> <pre><code>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; } } </code></pre> <p>I save my object in the internal memory device</p> <pre><code>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(); </code></pre> <p>And I try to read</p> <pre><code>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()); </code></pre> <p>And I have</p> <pre><code>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 </code></pre> <p>Thanks</p>
 

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