我使用的是Gson 2.8.2版
我使用了以下代码
public void saveObject(View view){
SharedPreferences prefs = this.getSharedPreferences(
"com.example.app", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = prefs.edit();
Gson gson = new Gson();
String str = gson.toJson(view, View.class);
editor.putString("text", str);
editor.commit();
}但我收到如下错误
Process: com.example.amitsiddhpura.paperview, PID: 17252
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.amitsiddhpura.paperview/com.example.amitsiddhpura.paperview.MainActivity}:**java.lang.SecurityException: Can not make a java.lang.reflect.Method constructor accessible**
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2778)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Caused by: java.lang.SecurityException: Can not make a java.lang.reflect.Method constructor accessible
at java.lang.reflect.AccessibleObject.setAccessible0(AccessibleObject.java:131)
at java.lang.reflect.AccessibleObject.setAccessible(AccessibleObject.java:115)
at com.google.gson.internal.ConstructorConstructor.newDefaultConstructor(ConstructorConstructor.java:101)
at com.google.gson.internal.ConstructorConstructor.get(ConstructorConstructor.java:83)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:99)
at com.google.gson.Gson.getAdapter(Gson.java:423)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:115)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:164)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:100)
at com.google.gson.Gson.getAdapter(Gson.java:423)
at com.google.gson.internal.bind.ArrayTypeAdapter$1.create(ArrayTypeAdapter.java:48)
at com.google.gson.Gson.getAdapter(Gson.java:423)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:115)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:164)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:100)
at com.google.gson.Gson.getAdapter(Gson.java:423)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:115)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:164)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:100)
at com.google.gson.Gson.getAdapter(Gson.java:423)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:115)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:164)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:100)
at com.google.gson.Gson.getAdapter(Gson.java:423)
at com.google.gson.Gson.toJson(Gson.java:661)
at com.google.gson.Gson.toJson(Gson.java:648)
at com.google.gson.Gson.toJson(Gson.java:603)
at com.example.amitsiddhpura.paperview.MainActivity.saveObject(MainActivity.java:34)
at com.example.amitsiddhpura.paperview.MainActivity.onCreate(MainActivity.java:23)
at android.app.Activity.performCreate(Activity.java:6999)
at android.app.Activity.performCreate(Activity.java:6990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2731)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
2条答案
按热度按时间5sxhfpxr1#
您正在尝试保存包含无法序列化上下文视图类Read Here.
kr98yfug2#
toJson方法中视图第一个参数错误从文档Class GSON中传递合适参数，它将工作
到Json（Json元素json元素）
将JsonElement树转换为其等效的JSON表示形式。
void toJson（JsonElement jsonElement，可追加的编写器）
写出JsonElement树的等效JSON。
void to Json（JsonElement，JsonWriter编写器）
将jsonElement的JSON写入编写器。
字符串toJson（对象源）
此方法将指定的对象序列化为其等效的Json表示形式。
void toJson（对象源，可追加的编写器）
此方法将指定的对象序列化为其等效的Json表示形式。
字符串toJson（对象源，类型typeOfSrc）
此方法将指定的对象（包括泛型类型的对象）序列化为其等效的Json表示形式。
void toJson（对象源，类型typeOfSrc，可追加的编写器）
此方法将指定的对象（包括泛型类型的对象）序列化为其等效的Json表示形式。
void to Json（对象源代码，类型源代码类型，JsonWriter编写器）
将typeOfSrc类型的src的JSON表示形式写入writer。