我想将对象传递到捆绑包。现在，我使用GSON将其转换为Json对象。
捆绑软件通过了，捆绑软件具有正确的字符串表示形式，但是当我从字符串创建对象时，会遇到巨大的错误。
FATAL EXCEPTION: main java.lang.RuntimeException: Failed to invoke private android.net.Uri() with no args at com.google.gson.internal.ConstructorConstructor$3.construct(ConstructorConstructor.java:107) at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:162) at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:93) at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:172) at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:40) at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:81) at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60) at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:93) at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:172) at com.google.gson.Gson.fromJson(Gson.java:803) at com.google.gson.Gson.fromJson(Gson.java:768) at com.google.gson.Gson.fromJson(Gson.java:717) at com.google.gson.Gson.fromJson(Gson.java:689) at com.test.fragment.QFragment.onCreateView(QFragment.java:54) at android.app.Fragment.performCreateView(Fragment.java:1788) at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:899) at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1101) at android.app.BackStackRecord.run(BackStackRecord.java:688) at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1559) at android.app.FragmentManagerImpl$1.run(FragmentManager.java:445) at android.os.Handler.handleCallback(Handler.java:730) at android.os.Handler.dispatchMessage(Handler.java:92) at android.os.Looper.loop(Looper.java:158) at android.app.ActivityThread.main(ActivityThread.java:5789) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:525) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:843) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.InstantiationException: can't instantiate class android.net.Uri at java.lang.reflect.Constructor.constructNative(Native Method) at java.lang.reflect.Constructor.newInstance(Constructor.java:417) at com.google.gson.internal.ConstructorConstructor$3.construct(ConstructorConstructor.java:104) at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:162) at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:93) at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:172) at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:40) at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:81) at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60) at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:93) at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:172) at com.google.gson.Gson.fromJson(Gson.java:803) at com.google.gson.Gson.fromJson(Gson.java:768) at com.google.gson.Gson.fromJson(Gson.java:717) at com.google.gson.Gson.fromJson(Gson.java:689) at com.test.fragment.QFragment.onCreateView(QFragment.java:54) at android.app.Fragment.performCreateView(Fragment.java:1788) at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:899) at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1101) at android.app.BackStackRecord.run(BackStackRecord.java:688) at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1559) at android.app.FragmentManagerImpl$1.run(FragmentManager.java:445) at android.os.Handler.handleCallback(Handler.java:730) at android.os.Handler.dispatchMessage(Handler.java:92) at android.os.Looper.loop(Looper.java:158) at android.app.ActivityThread.main(ActivityThread.java:5789) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:525) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:843) at dalvik.system.NativeStart.main(Native Method)
我正在做这样的转换：
public static QFragment newInstance(FModel oModel) { QFragment fragment = new QFragment(); fragment.mOModel = oModel; Bundle bdl = new Bundle(); bdl.putString("oModel", new Gson().toJson(oModel)); fragment.setArguments(bdl); return fragment; }
并在我的createView片段中：
String jsonMyObject = null; Bundle args = this.getArguments(); if (args != null) { jsonMyObject = args.getString("oModel"); } mOrderModel = new Gson().fromJson(jsonMyObject, FModel.class);
解决此问题的最佳方法是什么？我需要更改为可序列化还是可打包？
在FModel中发现问题，确实存在Uri。
通过编写解决此问题：
public class UriSerializer implements JsonSerializer<Uri> { public JsonElement serialize(Uri src, Type typeOfSrc, JsonSerializationContext context) { return new JsonPrimitive(src.toString()); } } public class UriDeserializer implements JsonDeserializer<Uri> { @Override public Uri deserialize(final JsonElement src, final Type srcType, final JsonDeserializationContext context) throws JsonParseException { return Uri.parse(src.getAsString()); } }
并像这样进行Gson转换：
Gson gson = new GsonBuilder() .registerTypeAdapter(Uri.class, new UriSerializer()) .create(); bdl.putString("oModel",gson.toJson(oModel));
并在oncreate中重建它：
Gson gson = new GsonBuilder() .registerTypeAdapter(Uri.class, new UriDeserializer()) .create(); jsonMyObject = args.getString("oModel"); mOrderModel = gson.fromJson(jsonMyObject, FModel.class);
