我正在尝试为学校完成这个项目，但我的 Parcelable 代码的“读取”部分不断收到此错误。这占用了我一天中的很多时间，我读过无数有类似问题的 StackOverflow 页面，但这些解决方案都不适合我。
以下是我读过的内容，但似乎不是问题所在:
- Proguard(因为我没有使用)
- Android Studio 已更新
- “读取”和“写入”类型不匹配
- “读取”和“写入”部分中对象参数的顺序
抛出错误的行:
this.quantity = ((float) in.readValue((float.class.getClassLoader())));
这是自定义类:
public class Ingredient implements Parcelable {
@SerializedName("quantity")
@Expose
private float quantity;
@SerializedName("measure")
@Expose
private String measure;
@SerializedName("ingredient")
@Expose
private String ingredient;
private Ingredient(Parcel in) {
this.quantity = ((float) in.readValue((float.class.getClassLoader())));
this.measure = ((String) in.readValue((String.class.getClassLoader())));
this.ingredient = ((String) in.readValue((String.class.getClassLoader())));
}
public void writeToParcel(Parcel dest, int flags) {
dest.writeValue(quantity);
dest.writeValue(measure);
dest.writeValue(ingredient);
}
/**
* No args constructor for use in serialization
*/
@SuppressWarnings("unused")
public Ingredient() {
}
/**
* @param measure
* @param ingredient
* @param quantity
*/
@SuppressWarnings("JavaDoc")
public Ingredient(float quantity, String measure, String ingredient) {
super();
this.quantity = quantity;
this.measure = measure;
this.ingredient = ingredient;
}
public static final Creator<Ingredient> CREATOR = new Creator<Ingredient>() {
@Override
public Ingredient createFromParcel(Parcel in) {
return new Ingredient(in);
}
@Override
public Ingredient[] newArray(int size) {
return new Ingredient[size];
}
};
public float getQuantity() {
return quantity;
}
public String getMeasure() {
return measure;
}
public String getIngredient() {
return ingredient;
}
public int describeContents() {
return 0;
}
这是堆栈跟踪:
java.lang.RuntimeException: Unable to start activityComponentInfo{com.joelcamargo.mybakingapp/com.joelcamargo.mybakingapp.FragmentActivity}: java.lang.RuntimeException: Parcel android.os.Parcel@b8940f5: Unmarshalling unknown type code 7077996 at offset 144
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)
Caused by: java.lang.RuntimeException: Parcel android.os.Parcel@b8940f5: Unmarshalling unknown type code 7077996 at offset 144
at android.os.Parcel.readValue(Parcel.java:2443)
at com.joelcamargo.mybakingapp.model.Ingredient.<init>(Ingredient.java:22)
at com.joelcamargo.mybakingapp.model.Ingredient.<init>(Ingredient.java:0)
at com.joelcamargo.mybakingapp.model.Ingredient$1.createFromParcel(Ingredient.java:55)
at com.joelcamargo.mybakingapp.model.Ingredient$1.createFromParcel(Ingredient.java:52)
at android.os.Parcel.createTypedArrayList(Parcel.java:2107)
at com.joelcamargo.mybakingapp.model.Recipe.<init>(Recipe.java:58)
at com.joelcamargo.mybakingapp.model.Recipe.<init>(Recipe.java:0)
at com.joelcamargo.mybakingapp.model.Recipe$1.createFromParcel(Recipe.java:71)
at com.joelcamargo.mybakingapp.model.Recipe$1.createFromParcel(Recipe.java:68)
at android.os.Parcel.readParcelable(Parcel.java:2470)
at android.os.Parcel.readValue(Parcel.java:2364)
at android.os.Parcel.readArrayMapInternal(Parcel.java:2717)
at android.os.BaseBundle.unparcel(BaseBundle.java:269)
at android.os.Bundle.getParcelable(Bundle.java:840)
at com.joelcamargo.mybakingapp.FragmentActivity.onCreate(FragmentActivity.java:90)
at android.app.Activity.performCreate(Activity.java:6662)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599)
任何帮助将不胜感激!
编辑1:
我根据下面 Ben 的回复更新了我的代码。我在堆栈跟踪中收到一条新的错误消息，并且我得到了一个数组大小为“7667790”的数组，该数组应该约为“12”。
新的堆栈跟踪:
JNI ERROR (app bug): weak global reference table overflow (max=51200)
A/art: art/runtime/indirect_reference_table.cc:116] weak global reference table dump:
A/art: art/runtime/indirect_reference_table.cc:116] Last 10 entries (of 51200):
A/art: art/runtime/indirect_reference_table.cc:116] 51199: 0x1b0d2c40 android.view.RenderNode
A/art: art/runtime/indirect_reference_table.cc:116] 51198: 0x1b0d2b68 android.view.RenderNode
A/art: art/runtime/indirect_reference_table.cc:116] 51197: 0x1b0d2ac0 android.view.RenderNode
A/art: art/runtime/indirect_reference_table.cc:116] 51196: 0x1b0d29d0 android.view.RenderNode
A/art: art/runtime/indirect_reference_table.cc:116] 51195: 0x1b0d28f8 android.view.RenderNode
A/art: art/runtime/indirect_reference_table.cc:116] 51194: 0x1b0d2850 android.view.RenderNode
A/art: art/runtime/indirect_reference_table.cc:116] 51193: 0x1b0d2760 android.view.RenderNode
A/art: art/runtime/indirect_reference_table.cc:116] 51192: 0x1b0d2688 android.view.RenderNode
A/art: art/runtime/indirect_reference_table.cc:116] 51191: 0x1b0d25e0 android.view.RenderNode
A/art: art/runtime/indirect_reference_table.cc:116] 51190: 0x1b0d24f0 android.view.RenderNode
A/art: art/runtime/indirect_reference_table.cc:116] Summary:
A/art: art/runtime/indirect_reference_table.cc:116] 1 of java.lang.Thread
A/art: art/runtime/indirect_reference_table.cc:116] 3 of byte[] (1152 elements) (3 unique instances)
A/art: art/runtime/indirect_reference_table.cc:116] 3 of byte[] (3828 elements) (3 unique instances)
A/art: art/runtime/indirect_reference_table.cc:116] 1 of byte[] (5376 elements)
A/art: art/runtime/indirect_reference_table.cc:116] 5 of byte[] (7056 elements) (5 unique instances)
A/art: art/runtime/indirect_reference_table.cc:116] 4 of byte[] (7844 elements) (4 unique instances)
A/art: art/runtime/indirect_reference_table.cc:116] 1 of byte[] (13356 elements)
A/art: art/runtime/indirect_reference_table.cc:116] 9 of byte[] (15876 elements) (9 unique instances)
A/art: art/runtime/indirect_reference_table.cc:116] 27 of byte[] (20164 elements) (27 unique instances)
A/art: art/runtime/indirect_reference_table.cc:116] 2 of byte[] (26896 elements) (2 unique instances)
A/art: art/runtime/indirect_reference_table.cc:116] 2 of byte[] (26912 elements) (2 unique instances)
A/art: art/runtime/indirect_reference_table.cc:116] 14 of byte[] (28224 elements) (14 unique instances)
A/art: art/runtime/indirect_reference_table.cc:116] 3 of byte[] (36100 elements) (3 unique instances)
A/art: art/runtime/indirect_reference_table.cc:116] 2 of byte[] (36288 elements) (2 unique instances)
A/art: art/runtime/indirect_reference_table.cc:116] 3 of byte[] (60984 elements) (3 unique instances)
A/art: art/runtime/indirect_reference_table.cc:116] 3 of byte[] (63504 elements) (3 unique instances)
A/art: art/runtime/indirect_reference_table.cc:116] 4 of byte[] (82792 elements) (4 unique instances)
A/art: art/runtime/indirect_reference_table.cc:116] 5 of byte[] (206116 elements) (5 unique instances)
A/art: art/runtime/indirect_reference_table.cc:116] 26 of java.lang.DexCache (26 unique instances)
A/art: art/runtime/indirect_reference_table.cc:116] 2 of dalvik.system.PathClassLoader (1 unique instances)
A/art: art/runtime/indirect_reference_table.cc:116] 51080 of android.view.RenderNode (51080 unique instances)
A/art: art/runtime/indirect_reference_table.cc:116]
A/art: art/runtime/runtime.cc:403] Runtime aborting...
A/art: art/runtime/runtime.cc:403] Aborting thread:
A/art: art/runtime/runtime.cc:403] "main" prio=5 tid=1 Runnable
A/art: art/runtime/runtime.cc:403] | group="" sCount=0 dsCount=0 obj=0x73fe7268 self=0xa990b400
A/art: art/runtime/runtime.cc:403] | sysTid=18360 nice=0 cgrp=default sched=0/0 handle=0xadc3e534
A/art: art/runtime/runtime.cc:403] | state=R schedstat=( 0 0 0 ) utm=1662 stm=110 core=0 HZ=100
A/art: art/runtime/runtime.cc:403] | stack=0xbf73e000-0xbf740000 stackSize=8MB
A/art: art/runtime/runtime.cc:403] | held mutexes= "abort lock" "JNI weak global reference table lock" "mutator lock"(shared held)
A/art: art/runtime/runtime.cc:403] native: #00 pc 0056d8de /system/lib/libart.so (_ZN3art15DumpNativeStackERNSt3__113basic_ostreamIcNS0_11char_traitsIcEEEEiP12BacktraceMapPKcPNS_9ArtMethodEPv+238)
A/art: art/runtime/runtime.cc:403] native: #01 pc 00539f6e /system/lib/libart.so (_ZNK3art6Thread9DumpStackERNSt3__113basic_ostreamIcNS1_11char_traitsIcEEEEbP12BacktraceMap+526)
A/art: art/runtime/runtime.cc:403] native: #02 pc 00536f6b /system/lib/libart.so (_ZNK3art6Thread4DumpERNSt3__113basic_ostreamIcNS1_11char_traitsIcEEEEbP12BacktraceMap+75)
A/art: art/runtime/runtime.cc:403] native: #03 pc 00522d43 /system/lib/libart.so (_ZNK3art10AbortState10DumpThreadERNSt3__113basic_ostreamIcNS1_11char_traitsIcEEEEPNS_6ThreadE+67)
A/art: art/runtime/runtime.cc:403] native: #04 pc 005229fa /system/lib/libart.so (_ZNK3art10AbortState4DumpERNSt3__113basic_ostreamIcNS1_11char_traitsIcEEEE+330)
A/art: art/runtime/runtime.cc:403] native: #05 pc 0051327b /system/lib/libart.so (_ZN3art7Runtime5AbortEv+155)
A/art: art/runtime/runtime.cc:403] native: #06 pc 00119572 /system/lib/libart.so (_ZN3art10LogMessageD1Ev+1298)
A/art: art/runtime/runtime.cc:403] native: #07 pc 002ca6c8 /system/lib/libart.so (_ZN3art22IndirectReferenceTable3AddEjPNS_6mirror6ObjectE+376)
A/art: art/runtime/runtime.cc:403] native: #08 pc 0038f68b /system/lib/libart.so (_ZN3art9JavaVMExt16AddWeakGlobalRefEPNS_6ThreadEPNS_6mirror6ObjectE+91)
A/art: art/runtime/runtime.cc:403] native: #09 pc 003ffc34 /system/lib/libart.so (_ZN3art3JNI16NewWeakGlobalRefEP7_JNIEnvP8_jobject+788)
A/art: art/runtime/runtime.cc:403] native: #10 pc 0013e912 /system/lib/libart.so (_ZN3art8CheckJNI6NewRefEPKcP7_JNIEnvP8_jobjectNS_15IndirectRefKindE+1106)
A/art: art/runtime/runtime.cc:403] native: #11 pc 00138689 /system/lib/libart.so (_ZN3art8CheckJNI16NewWeakGlobalRefEP7_JNIEnvP8_jobject+57)
A/art: art/runtime/runtime.cc:403] native: #12 pc 000c0927 /system/lib/libandroid_runtime.so (???)
A/art: art/runtime/runtime.cc:403] native: #13 pc 00acfd7c /system/framework/x86/boot-framework.oat (Java_android_view_RenderNode_nCreate__Ljava_lang_String_2+136)
A/art: art/runtime/runtime.cc:403] at android.view.RenderNode.nCreate(Native method)
A/art: art/runtime/runtime.cc:403] at android.view.RenderNode.<init>(RenderNode.java:137)
A/art: art/runtime/runtime.cc:403] at android.view.RenderNode.create(RenderNode.java:161)
A/art: art/runtime/runtime.cc:403] at android.view.View.<init>(View.java:4005)
A/art: art/runtime/runtime.cc:403] at android.view.View.<init>(View.java:4119)
A/art: art/runtime/runtime.cc:403] at android.view.ViewGroup.<init>(ViewGroup.java:578)
A/art: art/runtime/runtime.cc:403] at android.widget.RelativeLayout.<init>(RelativeLayout.java:248)
A/art: art/runtime/runtime.cc:403] at android.widget.RelativeLayout.<init>(RelativeLayout.java:244)
A/art: art/runtime/runtime.cc:403] at android.widget.RelativeLayout.<init>(RelativeLayout.java:240)
A/art: art/runtime/runtime.cc:403] at java.lang.reflect.Constructor.newInstance0!(Native method)
A/art: art/runtime/runtime.cc:403] at java.lang.reflect.Constructor.newInstance(Constructor.java:430)
A/art: art/runtime/runtime.cc:403] at android.view.LayoutInflater.createView(LayoutInflater.java:645)
A/art: art/runtime/runtime.cc:403] at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58)
A/art: art/runtime/runtime.cc:403] at android.view.LayoutInflater.onCreateView(LayoutInflater.java:717)
A/art: art/runtime/runtime.cc:403] at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:785)
A/art: art/runtime/runtime.cc:403] at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727)
A/art: art/runtime/runtime.cc:403] at android.view.LayoutInflater.inflate(LayoutInflater.java:495)
A/art: art/runtime/runtime.cc:403] - locked <0x0a6354e2> (a java.lang.Object[])
A/art: art/runtime/runtime.cc:403] at android.view.LayoutInflater.inflate(LayoutInflater.java:426)
A/art: art/runtime/runtime.cc:403] at com.diegodobelo.expandingview.ExpandingItem.createSubItem(ExpandingItem.java:457)
A/art: art/runtime/runtime.cc:403] at com.diegodobelo.expandingview.ExpandingItem.createSubItem(ExpandingItem.java:436)
A/art: art/runtime/runtime.cc:403] at com.diegodobelo.expandingview.ExpandingItem.createSubItems(ExpandingItem.java:488)
A/art: art/runtime/runtime.cc:403] at com.joelcamargo.mybakingapp.FragmentActivity.updateInfoViews(FragmentActivity.java:183)
A/art: art/runtime/runtime.cc:403] at com.joelcamargo.mybakingapp.FragmentActivity.onCreate(FragmentActivity.java:109)
A/art: art/runtime/runtime.cc:403] at android.app.Activity.performCreate(Activity.java:6662)
A/art: art/runtime/runtime.cc:403] at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
A/art: art/runtime/runtime.cc:403] at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599)
A/art: art/runtime/runtime.cc:403] at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
A/art: art/runtime/runtime.cc:403] at android.app.ActivityThread.-wrap12(ActivityThread.java:-1)
A/art: art/runtime/runtime.cc:403] at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
A/art: art/runtime/runtime.cc:403] at android.os.Handler.dispatchMessage(Handler.java:102)
A/art: art/runtime/runtime.cc:403] at android.os.Looper.loop(Looper.java:154)
A/art: art/runtime/runtime.cc:403] at android.app.ActivityThread.main(ActivityThread.java:6077)
A/art: art/runtime/runtime.cc:403] at java.lang.reflect.Method.invoke!(Native method)
A/art: art/runtime/runtime.cc:403] at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
A/art: art/runtime/runtime.cc:403] at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)
A/art: art/runtime/runtime.cc:403] Dumping all threads without appropriate locks held: thread list lock
最佳答案
我不完全确定您为什么会收到该错误，但我知道您可以通过更改 Parcelable 实现以使用更具体的方法来解决该问题:
private Ingredient(Parcel in) {
this.quantity = in.readFloat();
this.measure = in.readString();
this.ingredient = in.readString();
}
public void writeToParcel(Parcel dest, int flags) {
dest.writeFloat(quantity);
dest.writeString(measure);
dest.writeString(ingredient);
}
如果可以的话，您应该始终尽量避免 writeValue()。对于像float和String这样的简单类型，有专门的读/写方法直接支持它们，不需要担心类加载器。
关于java - Parcelable 对象错误 : Unmarshalling unknown type code *** at offset ***，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/48980541/