Android 在实现parcelable的活动之间发送对象
我需要将一个对象从一个活动发送到另一个活动;我读到一种方法是在我的对象中实现parcelable接口。 我安排了一些代码,但我想我搞砸了。 这是我的部分代码。 我要发送的对象:Android 在实现parcelable的活动之间发送对象,android,android-intent,arraylist,android-activity,Android,Android Intent,Arraylist,Android Activity,我需要将一个对象从一个活动发送到另一个活动;我读到一种方法是在我的对象中实现parcelable接口。 我安排了一些代码,但我想我搞砸了。 这是我的部分代码。 我要发送的对象: public class Profilo implements Parcelable { String nome; String cognome; .... public Profilo(String nome,String cognome,String dataNascita,String luogoNascita
public class Profilo implements Parcelable {
String nome;
String cognome;
....
public Profilo(String nome,String cognome,String dataNascita,String luogoNascita,String problematica,String dettagli)
{
this.nome = nome;
this.cognome = cognome;
....
}
public Profilo(Parcel parcel) {
this.nome = parcel.readString();
this.cognome = parcel.readString();
}
....
@Override
public int describeContents() {
// TODO Auto-generated method stub
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(nome);
dest.writeString(cognome);
}
public final static Parcelable.Creator CREATOR = new Parcelable.Creator() {
@Override
public Profilo createFromParcel(Parcel source) {
return new Profilo(source);
}
@Override
public Profilo[] newArray(int size) {
return new Profilo[size];
}
};
}
然后是发送对象的活动(Profilo对象的ArrayList):
也许我做错了,无论如何,我认为我的一个错误可能在这里:
bundle.putParcelable("profilo", (Parcelable) profili);
我很乐意接受任何建议和解释
这是stacktrace
03-10 18:54:37.484: E/AndroidRuntime(2262): FATAL EXCEPTION: main
03-10 18:54:37.484: E/AndroidRuntime(2262): Process: info.androidhive.slidingmenu, PID: 2262
03-10 18:54:37.484: E/AndroidRuntime(2262): java.lang.RuntimeException: Unable to start activity ComponentInfo{info.androidhive.slidingmenu/info.androidhive.slidingmenu.LoginChooser}: java.lang.ClassCastException: java.lang.Object[] cannot be cast to info.androidhive.slidingmenu.Profilo[]
03-10 18:54:37.484: E/AndroidRuntime(2262): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2176)
03-10 18:54:37.484: E/AndroidRuntime(2262): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2226)
03-10 18:54:37.484: E/AndroidRuntime(2262): at android.app.ActivityThread.access$700(ActivityThread.java:135)
03-10 18:54:37.484: E/AndroidRuntime(2262): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1397)
03-10 18:54:37.484: E/AndroidRuntime(2262): at android.os.Handler.dispatchMessage(Handler.java:102)
03-10 18:54:37.484: E/AndroidRuntime(2262): at android.os.Looper.loop(Looper.java:137)
03-10 18:54:37.484: E/AndroidRuntime(2262): at android.app.ActivityThread.main(ActivityThread.java:4998)
03-10 18:54:37.484: E/AndroidRuntime(2262): at java.lang.reflect.Method.invokeNative(Native Method)
03-10 18:54:37.484: E/AndroidRuntime(2262): at java.lang.reflect.Method.invoke(Method.java:515)
03-10 18:54:37.484: E/AndroidRuntime(2262): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)
03-10 18:54:37.484: E/AndroidRuntime(2262): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593)
03-10 18:54:37.484: E/AndroidRuntime(2262): at dalvik.system.NativeStart.main(Native Method)
03-10 18:54:37.484: E/AndroidRuntime(2262): Caused by: java.lang.ClassCastException: java.lang.Object[] cannot be cast to info.androidhive.slidingmenu.Profilo[]
03-10 18:54:37.484: E/AndroidRuntime(2262): at info.androidhive.slidingmenu.LoginChooser.onCreate(LoginChooser.java:21)
03-10 18:54:37.484: E/AndroidRuntime(2262): at android.app.Activity.performCreate(Activity.java:5243)
03-10 18:54:37.484: E/AndroidRuntime(2262): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
03-10 18:54:37.484: E/AndroidRuntime(2262): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2140)
03-10 18:54:37.484: E/AndroidRuntime(2262): ... 11 more
使用
并以这种方式重新阅读:
ArrayList<Profilo> profili = getIntent().getExtras().getParcelableArrayList("profilo");
ArrayList profili=getIntent().getExtras().getParcelableArrayList(“profilo”);
但问题出在哪里?我没有编译错误,但当我按下按钮启动活动时,应用程序崩溃。你能发布stacktrace吗?刚刚添加到原始帖子中你是否根据我的回答相应地更改了代码?还是一样的问题,当我按下按钮时,应用程序崩溃,我肯定是做错了什么,但是由于代码看起来不错,我一直无法找出我的错误
03-10 18:54:37.484: E/AndroidRuntime(2262): FATAL EXCEPTION: main
03-10 18:54:37.484: E/AndroidRuntime(2262): Process: info.androidhive.slidingmenu, PID: 2262
03-10 18:54:37.484: E/AndroidRuntime(2262): java.lang.RuntimeException: Unable to start activity ComponentInfo{info.androidhive.slidingmenu/info.androidhive.slidingmenu.LoginChooser}: java.lang.ClassCastException: java.lang.Object[] cannot be cast to info.androidhive.slidingmenu.Profilo[]
03-10 18:54:37.484: E/AndroidRuntime(2262): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2176)
03-10 18:54:37.484: E/AndroidRuntime(2262): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2226)
03-10 18:54:37.484: E/AndroidRuntime(2262): at android.app.ActivityThread.access$700(ActivityThread.java:135)
03-10 18:54:37.484: E/AndroidRuntime(2262): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1397)
03-10 18:54:37.484: E/AndroidRuntime(2262): at android.os.Handler.dispatchMessage(Handler.java:102)
03-10 18:54:37.484: E/AndroidRuntime(2262): at android.os.Looper.loop(Looper.java:137)
03-10 18:54:37.484: E/AndroidRuntime(2262): at android.app.ActivityThread.main(ActivityThread.java:4998)
03-10 18:54:37.484: E/AndroidRuntime(2262): at java.lang.reflect.Method.invokeNative(Native Method)
03-10 18:54:37.484: E/AndroidRuntime(2262): at java.lang.reflect.Method.invoke(Method.java:515)
03-10 18:54:37.484: E/AndroidRuntime(2262): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)
03-10 18:54:37.484: E/AndroidRuntime(2262): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593)
03-10 18:54:37.484: E/AndroidRuntime(2262): at dalvik.system.NativeStart.main(Native Method)
03-10 18:54:37.484: E/AndroidRuntime(2262): Caused by: java.lang.ClassCastException: java.lang.Object[] cannot be cast to info.androidhive.slidingmenu.Profilo[]
03-10 18:54:37.484: E/AndroidRuntime(2262): at info.androidhive.slidingmenu.LoginChooser.onCreate(LoginChooser.java:21)
03-10 18:54:37.484: E/AndroidRuntime(2262): at android.app.Activity.performCreate(Activity.java:5243)
03-10 18:54:37.484: E/AndroidRuntime(2262): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
03-10 18:54:37.484: E/AndroidRuntime(2262): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2140)
03-10 18:54:37.484: E/AndroidRuntime(2262): ... 11 more
bundle.putParcelableArrayList("profilo", profili);
ArrayList<Profilo> profili = getIntent().getExtras().getParcelableArrayList("profilo");