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PORestoring an ArrayAdapter through deserialization?
 

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    <p>I'm trying to serialize and deserialize a custom ArrayAdapter that implements Serializable. Serialization seems to work, but deserialization gives me an IllegalAccessException on the line marked "**" below:</p> <p>Serialization:</p> <pre><code>FileOutputStream fos = this.openFileOutput ( fileName, Context.MODE_PRIVATE ); ObjectOutputStream os = new ObjectOutputStream ( fos ); os.writeObject ( adapter ); os.close (); </code></pre> <p>Deserialization:</p> <pre><code>protected SerializableArrayAdapter createAdapter () { String fileName = "testFile"; try { FileInputStream fis = this.openFileInput ( fileName ); ObjectInputStream ois = new ObjectInputStream ( fis ); **SerializableArrayAdapter adapter = ( SerializableArrayAdapter ) ois.readObject ();** ois.close (); return adapter; } catch ( Exception ex ) { ex.printStackTrace (); } adapter = new SerializableArrayAdapter ( this, android.R.layout.simple_list_item_1 ); return adapter; } </code></pre> <p>What am I doing wrong? (I'm new both to java and android)</p> <p>Edit: logcat added. Eh, perhaps there's a way to make it less.... messy?</p> <pre><code>10-31 16:13:49.960: W/System.err(28966): java.io.InvalidClassException: android.widget.ArrayAdapter; IllegalAccessException 10-31 16:13:49.960: W/System.err(28966): at java.io.ObjectStreamClass.resolveConstructorClass(ObjectStreamClass.java:692) 10-31 16:13:49.960: W/System.err(28966): at java.io.ObjectStreamClass.newInstance(ObjectStreamClass.java:653) 10-31 16:13:49.960: W/System.err(28966): at java.io.ObjectInputStream.readNewObject(ObjectInputStream.java:1819) 10-31 16:13:49.960: W/System.err(28966): at java.io.ObjectInputStream.readNonPrimitiveContent(ObjectInputStream.java:787) 10-31 16:13:49.960: W/System.err(28966): at java.io.ObjectInputStream.readObject(ObjectInputStream.java:2006) 10-31 16:13:49.968: W/System.err(28966): at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1963) 10-31 16:13:49.968: W/System.err(28966): at com.example.tm2.MainActivity.createAdapter(MainActivity.java:41) 10-31 16:13:49.968: W/System.err(28966): at com.example.tm2.MainActivity.onCreate(MainActivity.java:29) 10-31 16:13:49.968: W/System.err(28966): at android.app.Activity.performCreate(Activity.java:5133) 10-31 16:13:49.968: W/System.err(28966): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 10-31 16:13:49.968: W/System.err(28966): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175) 10-31 16:13:49.968: W/System.err(28966): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) 10-31 16:13:49.968: W/System.err(28966): at android.app.ActivityThread.access$600(ActivityThread.java:141) 10-31 16:13:49.968: W/System.err(28966): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 10-31 16:13:49.968: W/System.err(28966): at android.os.Handler.dispatchMessage(Handler.java:99) 10-31 16:13:49.968: W/System.err(28966): at android.os.Looper.loop(Looper.java:137) 10-31 16:13:49.968: W/System.err(28966): at android.app.ActivityThread.main(ActivityThread.java:5103) 10-31 16:13:49.968: W/System.err(28966): at java.lang.reflect.Method.invokeNative(Native Method) 10-31 16:13:49.968: W/System.err(28966): at java.lang.reflect.Method.invoke(Method.java:525) 10-31 16:13:49.968: W/System.err(28966): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 10-31 16:13:49.968: W/System.err(28966): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 10-31 16:13:49.968: W/System.err(28966): at dalvik.system.NativeStart.main(Native Method) </code></pre>
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    1. CODo your adapter extended a `Serializable` class?
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    2. COTry this. http://stackoverflow.com/questions/4118751/how-do-i-serialize-an-object-and-save-it-to-a-file-in-android
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    3. COYup, it does: "class SerializableArrayAdapter extends ArrayAdapter implements Serializable".
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