I want to pass ArrayList of an Object from one Activity to Activity.

Here is the sample Code:

{
    ArrayList<object> list=new ArrayList<>();,java,android,arraylist,serialization,parcelable"/>
	














    

		

        

            
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首页  > 解决方案 > 我如何传递 ArrayList from one Activity to another Activity

I want to pass ArrayList of an Object from one Activity to Activity.


Here is the sample Code:


{
    ArrayList<object> list=new ArrayList<>();












java - 我如何传递 ArrayList from one Activity to another Activity

I want to pass ArrayList of an Object from one Activity to Activity.


Here is the sample Code:


{
    ArrayList<object> list=new ArrayList<>();





问题描述



I want to pass ArrayList of an Object from one Activity to Activity.


Here is the sample Code:


{
    ArrayList<object> list=new ArrayList<>();

    Object value[]=new Object[m.size()];
    int n=0;

    value[]=new Object[n];
    value[n]=data.getName("name");
    value[n]=data.getLocation("location");

    list.add(value[n]);
    n++; //Since there are "n" number of object 
    
    }
    
    //here the value a which is ArrayList Object
    // which I want to pass it from here to another activity.



So now how will I pass the object from here to another activity.
However, I am able to get the value using Gson.
By converting the value to json and pass it as String to SharedPreference
and retrieving from another activity then convert back from Json using the Type to back it's Original form.


I want to know whether is it possible to pass the value using Parceable. Because I am getting null value when I used it.


here is the code which I tried to make my Object variable Parceable:


public class ProductList implements Parcelable {

private String NAME;
private String LOCATION;

public ProductList() {
}

protected ProductList(Parcel in) {
    LOCATION= in.readString();
    NAME= in.readString();
   
}

public static final Creator<ProductList> CREATOR = new Creator<ProductList>() {
    @Override
    public ProductList createFromParcel(Parcel in) {
        return new ProductList(in);
    }

    @Override
    public ProductList[] newArray(int size) {
        return new ProductList[size];
    }
};

public String getNAME() {
    return NAME;
}
public void setNAME(String NAME) {
    this.NAME= NAME;
}
public String getLOCATION() {
    return LOCATION;
}
public void setITEM_IMAGE(String LOCATION) {
    this.LOCATION= LOCATION;
}
@Override
public int describeContents() {
    return 0;
}

@Override
public void writeToParcel(Parcel dest, int flags) {
    dest.writeString(NAME);
    dest.writeString(LOCATION);
}
}








Can not use await + Result.Error:- 'string' does not contain a definition for 'GetAwaiter' and no accessible extension method 'GetAwaiter'


I have the following code inside my asp.net core mvc:-


var result = await _context.Settings.SingleOrDefaultAsync(a => a.Name.ToLower() == "noofvisits").Result.Value;



but i got this error:-


Error   CS1061  'string' does not contain a definition for 'GetAwaiter' and no accessible extension method 'GetAwaiter' accepting a first argument of type 'string' could be found (are you missing a using directive or an assembly reference?)



so why i am getting this error?
Thanks


标签： javaandroidarraylistserializationparcelable


解决方案









请参阅此链接以了解。


活动一：


Intent intent = new Intent(getApplicationContext(), SecondActivity.class);
            ArrayList<object> list=new ArrayList<>();
            intent.putExtra("LIST", list);
            startActivity(intent);



活动二：


ArrayList<object> list = (ArrayList<object>)getIntent().getSerializableExtra("LIST");



还要在您的自定义类中实现 Serializable。


public class ProductList implements Parcelable, Serializable











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