Error While Passing An Object From An Activity To Another (Using Parcelable)

android, android-intent, parcelable

Solution

You need to implement the code to write and read your class fields from parcel.

In `writeToParcel`:

@Override
public void writeToParcel(Parcel dest, int flags) {
      dest.writeString(st_AcadimicNumber);
      dest.writeString(st_Name);
      dest.writeString(st_Class);
}

The Parcel CREATOR:

public static final Parcelable.Creator<Track> CREATOR
= new Parcelable.Creator<Track>() {
    public Student createFromParcel(Parcel in) {
        return new Track(in);
    }

    public Student[] newArray(int size) {
        return new Track[size];
    }
};

And the constructor:

public Student (Parcel source){
      /*
       * Reconstruct from the Parcel. Keep same order as in writeToParcel()
       */
      st_AcadimicNumber = source.readString();
      st_Name = source.readString();
      st_Class = source.readString();
}

And it's done.

Regards

Problem

I Tried To Pass An Object Class From An Activity To Another Using Parcelable I've Create A Class And Name it Student ``` package com.example.test08_passobjectoverintent; import android.os.Parcel; import android.os.Parcelable; public class Student implements Parcelable { private String st_AcadimicNumber ; private String st_Name ; private String st_Class ; public String getSt_AcadimicNumber() { return st_AcadimicNumber; } public void setSt_AcadimicNumber(String st_AcadimicNumber) { this.st_AcadimicNumber = st_AcadimicNumber; } public String getSt_Name() { return st_Name; } public void setSt_Name(String st_Name) { this.st_Name = st_Name; } public String getSt_Class() { return st_Class; } public void setSt_Class(String st_Class) { this.st_Class = st_Class; } public Student(String st_AcadimicNumber, String st_Name, String st_Class) { super(); this.st_AcadimicNumber = st_AcadimicNumber; this.st_Name = st_Name; this.st_Class = st_Class; } public Student() { super(); } @Override public int describeContents() { // TODO Auto-generated method stub return 0; } @Override public void writeToParcel(Parcel dest, int flags) { // TODO Auto-generated method stub } } ``` In The Main Activity I Use This Code To Pass The Obejct ... ``` Student st = new Student("aaa","bbb","ccc"); Intent intent = new Intent(MainActivity.this,Main2Activity.class); intent.putExtra("stu", st); startActivity(intent); ``` In The Second Activity (Retrieve One) I use This Code (ERROR IS HERE) ``` Student model = (Student)getIntent().getParcelableExtra("stu"); ``` LogCat Error ``` 12-09 15:50:06.068: E/Trace(30655): error opening trace file: No such file or directory (2) 12-09 15:50:06.188: D/libEGL(30655): loaded /system/lib/egl/libEGL_mali.so 12-09 15:50:06.188: D/libEGL(30655): loaded /system/lib/egl/libGLESv1_CM_mali.so 12-09 15:50:06.193: D/libEGL(30655): loaded /system/lib/egl/libGLESv2_mali.so 12-09 15:50:06.193: D/(30655): Device driver API match 12-09 15:50:06.193: D/(30655): Device driver API version: 10 12-09 15:50:06.193: D/(30655): User space API version: 10 12-09 15:50:06.193: D/(30655): mali: REVISION=Linux-r2p4-02rel0 BUILD_DATE=Wed Sep 12 17:53:53 KST 2012 12-09 15:50:06.218: D/OpenGLRenderer(30655): Enabling debug mode 0 12-09 15:50:08.033: D/GestureDetector(30655): [Surface Touch Event] mSweepDown False, mLRSDCnt : -1 mTouchCnt : 4 mFalseSizeCnt:0 12-09 15:50:08.123: D/AndroidRuntime(30655): Shutting down VM 12-09 15:50:08.123: W/dalvikvm(30655): threadid=1: thread exiting with uncaught exception (group=0x40e372a0) 12-09 15:50:08.128: E/AndroidRuntime(30655): FATAL EXCEPTION: main 12-09 15:50:08.128: E/AndroidRuntime(30655): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.test08_passobjectoverintent/com.example.test08_passobjectoverintent.Main2Activity}: android.os.BadParcelableException: Parcelable protocol requires a Parcelable.Creator object called CREATOR on class com.example.test08_passobjectoverintent.Student 12-09 15:50:08.128: E/AndroidRuntime(30655): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2100) 12-09 15:50:08.128: E/AndroidRuntime(30655): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125) 12-09 15:50:08.128: E/AndroidRuntime(30655): at android.app.ActivityThread.access$600(ActivityThread.java:140) 12-09 15:50:08.128: E/AndroidRuntime(30655): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227) 12-09 15:50:08.128: E/AndroidRuntime(30655): at android.os.Handler.dispatchMessage(Handler.java:99) 12-09 15:50:08.128: E/AndroidRuntime(30655): at android.os.Looper.loop(Looper.java:137) 12-09 15:50:08.128: E/AndroidRuntime(30655): at android.app.ActivityThread.main(ActivityThread.java:4898) 12-09 15:50:08.128: E/AndroidRuntime(30655): at java.lang.reflect.Method.invokeNative(Native Method) 12-09 15:50:08.128: E/AndroidRuntime(30655): at java.lang.reflect.Method.invoke(Method.java:511) 12-09 15:50:08.128: E/AndroidRuntime(30655): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1008) 12-09 15:50:08.128: E/AndroidRuntime(30655): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:775) 12-09 15:50:08.128: E/AndroidRuntime(30655): at dalvik.system.NativeStart.main(Native Method) 12-09 15:50:08.128: E/AndroidRuntime(30655): Caused by: android.os.BadParcelableException: Parcelable protocol requires a Parcelable.Creator object called CREATOR on class com.example.test08_passobjectoverintent.Student 12-09 15:50:08.128: E/AndroidRuntime(30655): at android.os.Parcel.readParcelable(Parcel.java:2086) 12-09 15:50:08.128: E/AndroidRuntime(30655): at android.os.Parcel.readValue(Parcel.java:1965) 12-09 15:50:08.128: E/AndroidRuntime(30655): at android.os.Parcel.readMapInternal(Parcel.java:2226) 12-09 15:50:08.128: E/AndroidRuntime(30655): at android.os.Bundle.unparcel(Bundle.java:223) 12-09 15:50:08.128: E/AndroidRuntime(30655): at android.os.Bundle.getParcelable(Bundle.java:1165) 12-09 15:50:08.128: E/AndroidRuntime(30655): at android.content.Intent.getParcelableExtra(Intent.java:4451) 12-09 15:50:08.128: E/AndroidRuntime(30655): at com.example.test08_passobjectoverintent.Main2Activity.onCreate(Main2Activity.java:22) 12-09 15:50:08.128: E/AndroidRuntime(30655): at android.app.Activity.performCreate(Activity.java:5191) 12-09 15:50:08.128: E/AndroidRuntime(30655): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094) 12-09 15:50:08.128: E/AndroidRuntime(30655): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2064) 12-09 15:50:08.128: E/AndroidRuntime(30655): ... 11 more ```

Original source