Allow object creation using SafeParcelUtil and add AutoSafeParcelable

src/org/microg/safeparcel/AutoSafeParcelable.java

@@ -0,0 +1,36 @@
+package org.microg.safeparcel;
+
+import android.os.Parcel;
+
+import java.lang.reflect.Array;
+
+public abstract class AutoSafeParcelable implements SafeParcelable {
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel out, int flags) {
+        SafeParcelUtil.writeObject(this, out, flags);
+    }
+
+    public static class AutoCreator<T extends SafeParcelable> implements Creator<T> {
+
+        private Class<T> tClass;
+
+        public AutoCreator(Class<T> tClass) {
+            this.tClass = tClass;
+        }
+
+        @Override
+        public T createFromParcel(Parcel parcel) {
+            return SafeParcelUtil.createObject(tClass, parcel);
+        }
+
+        @Override
+        public T[] newArray(int i) {
+            return (T[]) Array.newInstance(tClass, i);
+        }
+    }
+}

src/org/microg/safeparcel/SafeParcelUtil.java

@@ -5,13 +5,31 @@
 import android.os.Parcelable;
 import android.util.Log;
 
+import java.lang.reflect.Constructor;
 import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
 import java.util.HashMap;
 import java.util.Map;
 
 public class SafeParcelUtil {
     private static final String TAG = "SafeParcel";
 
+    public static <T extends SafeParcelable> T createObject(Class<T> tClass, Parcel in) {
+        try {
+            Constructor<T> constructor = tClass.getDeclaredConstructor();
+            boolean acc = constructor.isAccessible();
+            constructor.setAccessible(true);
+            T t = constructor.newInstance();
+            readObject(t, in);
+            constructor.setAccessible(acc);
+            return t;
+        } catch (NoSuchMethodException e) {
+            throw new RuntimeException("createObject() requires a default constructor");
+        } catch (InvocationTargetException | InstantiationException | IllegalAccessException e) {
+            throw new RuntimeException("Can't construct object", e);
+        }
+    }
+
     public static void writeObject(SafeParcelable object, Parcel parcel, int flags) {
         if (object == null)
             throw new NullPointerException();