在使用parcelable的活动之间传递ArrayList对象

我先开始说这个关闭，说我已经看到所有处理这个问题的其他文章，并尝试所有这些。在使用parcelable的活动之间传递ArrayList对象

我试图做同样的事情问在其他职位，这是传递一个ArrayList的值从一个活动到另一个使用Intent。

我觉得我已经正确实施了我的课程。下面是我使用的主类（Route_Class）。

```

public class Route_Class implements Parcelable { 
private double latitude = 0; 
private double longitude = 0; 
private double startingLat = 0; 
private double startingLong = 0; 
private String name = null; 
private String routeName = null; 
private String GeoPoints = null; 
private String layout_width= null; 
private String layout_height = null; 
private String orientation = null; 
private String xmlns = null; 
private String id = null; 
private boolean clickable = false; 
private boolean enabled = false; 
private String layout_width2 = null; 
private String layout_height2 = null; 
private String apiKey = null; 
private ArrayList<GeoPoints_Class> geoPoints_arraylist = new ArrayList<GeoPoints_Class>(); 

public Route_Class() { 
    System.out.println("crash 110"); 
} 

public Route_Class(String name, double latitude, double longitude, double startingLat, double startingLong, String routeName, String GeoPoints, String layout_width, String layout_height, String orientation, String xmlns, String id, boolean clickable, boolean enabled, String layout_width2, String layout_height2, String apiKey, ArrayList<GeoPoints_Class> geoPoints_arraylist) { 
    this.name = name; 
    this.latitude = latitude; 
    this.longitude = longitude; 
    this.layout_width2 = layout_width2; 
    this.latitude = latitude; 
    this.longitude = longitude; 
    this.startingLat = startingLat; 
    this.startingLong = startingLong; 
    this.routeName = routeName; 
    this.GeoPoints = GeoPoints; 
    this.layout_width = layout_width; 
    this.layout_height = layout_height; 
    this.orientation = orientation; 
    this.xmlns = xmlns; 
    this.id = id; 
    this.clickable = clickable; 
    this.enabled = enabled; 
    this.layout_height2 = layout_height2; 
    this.apiKey = apiKey; 
    this.geoPoints_arraylist = geoPoints_arraylist; 
    System.out.println("crash 16"); 
} 

/* everything below here is for implementing Parcelable */ 

// 99.9% of the time you can just ignore this 
public int describeContents() { 
    System.out.println("crash 17"); 
    return this.hashCode(); 

} 

// write your object's data to the passed-in Parcel 
public void writeToParcel(Parcel dest, int flags) { 
    System.out.println("crash 18"); 
    dest.writeDouble(latitude); 
    dest.writeDouble(longitude); 
    dest.writeDouble(startingLat); 
    dest.writeDouble(startingLong); 
    dest.writeString(name); 
    dest.writeString(routeName); 
    dest.writeString(GeoPoints); 
    dest.writeString(layout_width); 
    dest.writeString(layout_height); 
    dest.writeString(orientation); 
    dest.writeString(xmlns); 
    dest.writeString(id); 
    dest.writeInt(clickable ? 0 : 1);  
    dest.writeInt(enabled ? 0 : 1); 
    dest.writeString(layout_width2); 
    dest.writeString(layout_height2); 
    dest.writeString(apiKey); 
    dest.writeTypedList(geoPoints_arraylist); 
//  dest.writeList((List<GeoPoints_Class>)geoPoints_arraylist); 

//  dest.writeParcelable((Parcelable) geoPoints_arraylist, 0); 

} 

// this is used to regenerate your object. All Parcelables must have a CREATOR that implements these two methods 
public static final Parcelable.Creator<Route_Class> CREATOR = new Parcelable.Creator<Route_Class>() { 
    public Route_Class createFromParcel(Parcel in) { 
     System.out.println("crash 20"); 
     return new Route_Class(in); 
    } 

    public Route_Class[] newArray(int size) { 
     System.out.println("crash 21"); 
     return new Route_Class[size]; 
    } 
}; 

// example constructor that takes a Parcel and gives you an object populated with it's values 
private Route_Class(Parcel in) { 
    layout_width2 = in.readString(); 
    latitude = in.readDouble(); 
    longitude = in.readDouble(); 
    startingLat = in.readDouble(); 
    startingLong = in.readDouble(); 
    name = in.readString(); 
    routeName = in.readString(); 
    GeoPoints = in.readString(); 
    layout_width = in.readString(); 
    layout_height = in.readString(); 
    orientation = in.readString(); 
    xmlns = in.readString(); 
    id = in.readString(); 
    clickable = in.readInt() == 0; 
    enabled = in.readInt() == 0; 
    layout_height2 = in.readString(); 
    apiKey = in.readString(); 
    System.out.println("crash 5"); 
//geoPoints_arraylist = new ArrayList<GeoPoints_Class>(); 
    if (geoPoints_arraylist == null) { 
     geoPoints_arraylist = new ArrayList<GeoPoints_Class>(); 
    } 
    try { 
    in.readTypedList(geoPoints_arraylist, GeoPoints_Class.CREATOR); 
    } catch (Exception e) { 
     System.out.println("Error " + e); 
    } 
//  in.readList(geoPoints_arraylist, com.breckbus.app.GeoPoints_Class.class.getClassLoader()); 
    System.out.println("crash 6"); 

//  geoPoints_arraylist = (ArrayList<GeoPoints_Class>)in.readParcelable(com.breckbus.app.Route_Class.GeoPoints_Class. class.getClassLoader()); 
} 

public double getlatitude() { 
    return latitude; 
} 

public void setlatitude(double latitude) { 
    this.latitude = latitude; 
} 

public double getlongitude() { 
    return longitude; 
} 

public void setlongitude(double longitude) { 
    this.longitude = longitude; 
} 

public double getstartingLat() { 
    return startingLat; 
} 

public void setstartingLat(double startingLat) { 
    this.startingLat = startingLat; 
} 

public double getstartingLong() { 
    return startingLong; 
} 

public void setstartingLong(double startingLong) { 
    this.startingLong = startingLong; 
} 

public String getname() { 
    return name; 
} 

public void setname(String name) { 
    this.name = name; 
} 

public String getrouteName() { 
    return routeName; 
} 

public void setrouteName(String routeName) { 
    this.routeName = routeName; 
} 

public String getGeoPoints() { 
    return GeoPoints; 
} 

public void setGeoPoints(String GeoPoints) { 
    this.GeoPoints = GeoPoints; 
} 

public String getLayout_width() { 
    return layout_width; 
} 

public void setLayout_width(String layout_width) { 
    this.layout_width = layout_width; 
} 

public String getLayout_height() { 
    return layout_height; 
} 

public void setLayout_height(String layout_height) { 
    this.layout_height = layout_height; 
} 

public boolean isEnabled() { 
    return enabled; 
} 

public void setEnabled(boolean enabled) { 
    this.enabled = enabled; 
} 

public String getOrientation() { 
    return orientation; 
} 

public void setOrientation(String orientation) { 
    this.orientation = orientation; 
} 

public String getXmlns() { 
    return xmlns; 
} 

public void setXmlns(String xmlns) { 
    this.xmlns = xmlns; 
} 

public String getId() { 
    return id; 
} 

public void setId(String id) { 
    this.id = id; 
} 

public boolean isClickable() { 
    return clickable; 
} 

public void setClickable(boolean clickable) { 
    this.clickable = clickable; 
} 

public String getLayout_width2() { 
    return layout_width2; 
} 

public void setLayout_width2(String layout_width2) { 
    this.layout_width2 = layout_width2; 
} 

public String getLayout_height2() { 
    return layout_height2; 
} 

public void setLayout_height2(String layout_height2) { 
    this.layout_height2 = layout_height2; 
} 

public String getApiKey() { 
    return apiKey; 
} 

public void setApiKey(String apiKey) { 
    this.apiKey = apiKey; 
} 
@Override 
public String toString() { 
    StringBuilder sb = new StringBuilder(); 
    sb.append("Route Class Details:").append("\n\n"); 
    sb.append("latitude: ").append(getlatitude()); 
    sb.append("\n"); 
    sb.append("longitude: ").append(getlongitude()); 
    sb.append("\n"); 
    sb.append("startingLat: ").append(getstartingLat()); 
    sb.append("\n"); 
    sb.append("startingLong: ").append(getstartingLong()); 
    sb.append("\n"); 
    sb.append("name: ").append(getname()); 
    sb.append("\n"); 
    sb.append("routeName: ").append(getrouteName()); 
    sb.append("\n"); 
    sb.append("GeoPoints: ").append(getGeoPoints()); 
    sb.append("\n"); 
    sb.append("layout_width: ").append(getLayout_width()); 
    sb.append("\n"); 
    sb.append("layout_height: ").append(getLayout_height()); 
    sb.append("\n"); 
    sb.append("orientation: ").append(getOrientation()); 
    sb.append("\n"); 
    sb.append("xmlns: ").append(getXmlns()); 
    sb.append("\n"); 
    sb.append("id: ").append(getId()); 
    sb.append("\n"); 
    sb.append("clickable: ").append(isClickable()); 
    sb.append("\n"); 
    sb.append("enabled: ").append(isEnabled()); 
    sb.append("\n"); 
    sb.append("layout_width2: ").append(layout_width2); 
    sb.append("\n"); 
    sb.append("layout_height2: ").append(getLayout_height2()); 
    sb.append("\n"); 
    sb.append("apiKey: ").append(getApiKey());       

    return sb.toString(); 
} 

// public ArrayList<GeoPoints_Class> getGeoPoints_arraylist() { 
//  return geoPoints_arraylist; 
// } 
public ArrayList<GeoPoints_Class> getGeoPoints_arraylist() { 
     return geoPoints_arraylist; 
    } 

public void setGeoPoints_arraylist(ArrayList<GeoPoints_Class> geoPoints_arraylist)  { 
    this.geoPoints_arraylist = geoPoints_arraylist; 
} 

public GeoPoints_Class getGeoPoints(int i) { 
    return geoPoints_arraylist.get(i); 
}  

public void addGeoPoint(double lat, double lon, String location) { 
    this.geoPoints_arraylist.add(new GeoPoints_Class(lat, lon, location)); 
} 

}

```

这里是在Route_Class用于我的第二类（GeoPoints_Class）。

```

package com.breckbus.app; 

import android.os.Parcel; 
import android.os.Parcelable; 


class GeoPoints_Class implements Parcelable { 

private double lat; 

private double lon; 

private String location; 

public GeoPoints_Class(){ 
    System.out.println("crash 99"); 
} 

public GeoPoints_Class(double lat, double lon, String location){ 
    System.out.println("crash 7"); 
    this.lat = lat; 
    this.lon = lon; 
    this.location = location; 
} 

public int describeContents() { 
    return this.hashCode(); 
} 

// write your object's data to the passed-in Parcel 
public void writeToParcel(Parcel dest, int flags) {  
    System.out.println("crash 11"); 
    dest.writeDouble(lat); 
    dest.writeDouble(lon); 
    dest.writeString(location); 
    System.out.println("crash 12"); 
} 

// this is used to regenerate your object. All Parcelables must have a CREATOR that implements these two methods 
public static final Parcelable.Creator<GeoPoints_Class> CREATOR = new Parcelable.Creator<GeoPoints_Class>() { 
    public GeoPoints_Class createFromParcel(Parcel in) { 
     System.out.println("crash 28"); 
     return new GeoPoints_Class(in); 
    } 

    public GeoPoints_Class[] newArray(int size) { 
     System.out.println("crash 29"); 
     return new GeoPoints_Class[size]; 
    } 
}; 

// example constructor that takes a Parcel and gives you an object populated with it's values 
private GeoPoints_Class(Parcel in) { 
    System.out.println("crash 13"); 
    lat = in.readDouble(); 
    lon = in.readDouble(); 
    location = in.readString(); 
    System.out.println("crash 14"); 
} 

public double getLat() { 
    return lat; 
} 

public void setLat(double lat) { 
    this.lat = lat; 
} 

public double getLon() { 
    return lon; 
} 

public void setLon(double lon) { 
    this.lon = lon; 
} 

public String getLocation() { 
    return location; 
} 

public void setLocation(String location) { 
    this.location = location; 
} 

@Override 
public String toString() { 
    StringBuilder sb = new StringBuilder(); 
    sb.append("GeoPoint Class Details:").append("\n\n");  
    sb.append("latitude: ").append(getLat()); 
    sb.append("\n"); 
    sb.append("longitude: ").append(getLon()); 
    sb.append("\n"); 
    sb.append("location: ").append(getLocation()); 
    sb.append("\n");       

    return sb.toString(); 
}

}

```

接下来就是我把使用putExtra的对象。

```

Intent i = new Intent("com.breckbus.app.ROUTE"); 
//  i.putParcelableArrayListExtra("route_Classes_temp", route_Classes); 
i.putExtra("route_Classes_temp",route_Classes); 
System.out.println("crash 1");

```

然后在那里我得到的对象。

```

Bundle extras = getIntent().getExtras(); 
Intent d = getIntent(); 
System.out.println("crash 25"); 
route_Classes = d.getParcelableArrayListExtra("route_Classes_temp"); 
System.out.println("crash 2"); 
//  route_Classes = getIntent().getParcelableArrayListExtra("route_Classes_temp");

```

你会发现所有自与调试模式（断点和东西）Android应用程序的Eclipse不工作我的手动调试语句。（如果你知道解决方案，这将非常有帮助）。

接下来是我得到的唯一错误，以及我在代码中输入的手动调试语句的位置。我不知道它在哪里崩溃了。

这里是第一对夫妇的错误：

```

10-26 00:03:50.165: I/System.out(323): crash 13 
10-26 00:03:50.165: I/System.out(323): crash 14 
10-26 00:03:50.165: I/System.out(323): crash 28 
10-26 00:03:50.165: I/System.out(323): crash 13 
10-26 00:03:50.165: I/System.out(323): crash 14 
10-26 00:03:50.185: I/System.out(323): crash 6 
10-26 00:03:50.195: D/AndroidRuntime(323): Shutting down VM 
10-26 00:03:50.195: W/dalvikvm(323): threadid=1: thread exiting with uncaught exception (group=0x4001d800) 
10-26 00:03:50.225: E/AndroidRuntime(323): FATAL EXCEPTION: main 
10-26 00:03:50.225: E/AndroidRuntime(323): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.breckbus.app/com.breckbus.app.route}: java.lang.RuntimeException: Parcel [email protected]: Unmarshalling unknown type code 6553714 at offset 968 
10-26 00:03:50.225: E/AndroidRuntime(323): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 
10-26 00:03:50.225: E/AndroidRuntime(323): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
10-26 00:03:50.225: E/AndroidRuntime(323): at android.app.ActivityThread.access$2300(ActivityThread.java:125) 
10-26 00:03:50.225: E/AndroidRuntime(323): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
10-26 00:03:50.225: E/AndroidRuntime(323): at android.os.Handler.dispatchMessage(Handler.java:99) 
10-26 00:03:50.225: E/AndroidRuntime(323): at android.os.Looper.loop(Looper.java:123) 
10-26 00:03:50.225: E/AndroidRuntime(323): at android.app.ActivityThread.main(ActivityThread.java:4627) 
10-26 00:03:50.225: E/AndroidRuntime(323): at java.lang.reflect.Method.invokeNative(Native Method) 
10-26 00:03:50.225: E/AndroidRuntime(323): at java.lang.reflect.Method.invoke(Method.java:521)

```

我希望我提供足够的信息。当使用Intent尝试将对象类型Route_Class的Route_class ArrayList从一个活动传递给另一个活动时，请告诉我我做错了什么。这两行：

i.putExtra（“route_Classes_temp”，route_Classes）;

route_Classes = d.getParcelableArrayListExtra（“route_Classes_temp”）;

谢谢你的帮助，非常感谢。

来源

2012-10-26 kbarnes

“我希望我已经提供了足够的信息”：您提供了太多太多的信息。对所有这些进行筛选并找出相关的内容是非常困难的（志愿者人数也会减少）。你不应该在这里用堆栈跟踪转储你的整个项目，并说“我该怎么做？”如果有的话，它将不会得到很好的回应。 :(尽量隔离你的问题，并只提供相关的代码位的具体问题。 – asteri

的确，您提供的信息太多了。

但是，这是在相同的过程（即只有你自己的应用程序？）如果是的话，那么完全避免这样做。对于这些对象的打包/重新打包太慢了。

在你存储你的数据的地方使用一个singleton，并从每个活动中访问单例。

来源

2012-10-26 03:39:58 dnkoutso

在使用parcelable的活动之间传递ArrayList对象

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