CODEWITHSUNDEEP
androidlistviewandroid-activityarraylist
Nanda Febrian A
Nanda Febrian A

Reputation: 43

Passing ArrayList<Object> data using putExtra

im newbie on android. I need to send data from ListView with customAdapter to detailActivity that show detail's item from selected item of listView. I have seen a few post about it and i still confuse about it.

Would you help me?

This is my data class :

public class ListData {

private String title;
private String desc;

public ListData(String title, String desc) {
    this.title = title;
    this.desc = desc;
}

public String getTitle() {
    return title;
}

public String getDesc() {
    return desc;
}

}

This is my arrayList declaration :

ArrayList<ListData> data = new ArrayList<ListData>();
data.add(new ListData("Sidik Suhendar", "Telkom University"));

I don't have idea, how i can send my arraylist data to another activity. Please help me :) give me some example too :) Thanks

Upvotes: 2

Views: 3631

Answers (2)

Levi Moreira
Levi Moreira

Reputation: 12005

You need to make your base object, ListData parcelable:

public class ListData implements Parcelable {

    private String title;
    private String desc;

    public ListData(String title, String desc) {
        this.title = title;
        this.desc = desc;
    }

    public String getTitle() {
        return title;
    }

    public String getDesc() {
        return desc;
    }

    @Override
    public int describeContents() {
        return 0;
    }

    public ListData(Parcel source) {
        title = source.readString();
        desc = source.readString();
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeString(title);
        dest.writeString(desc);

    }

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

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

Once it is parcelable you can simply do in the first activity:

ArrayList<ListData> data = new ArrayList<ListData>();
data.add(new ListData("Sidik Suhendar", "Telkom University"));
intent.putParcelableArrayListExtra("ARRAY_LIST", data);

And you can read it in the other activity as:

ArrayList<ListData> data = (ArrayList<ListData>) getIntent().getExtras().getParcelableArrayList("ARRAY_LIST");

EDIT:

listview.setOnItemClickListener(new OnItemClickListener(){   
    @Override
    public void onItemClick(AdapterView<?>adapter,View v, int position){
        ListData item = adapter.getItemAtPosition(position);
        Intent intent = new Intent(Activity.this,DetailActivity.class);
        intent.putExtra("ARRAY_ITEM", item);
        startActivity(intent);
    }
});

Then in the destination activity:

ListData data = (ListData) getIntent().getExtras().getParcelable("ARRAY_ITEM");

Upvotes: 3

L_Xian
L_Xian

Reputation: 1

First step: ListData implements Parcelable:

public class ListData implements Parcelable {
private String title;
private String desc;

public ListData(String title, String desc) {
    this.title = title;
    this.desc = desc;
}

public String getTitle() {
    return title;
}

public String getDesc() {
    return desc;
}

@Override
public int describeContents() {
    return 0;
}

@Override
public void writeToParcel(Parcel dest, int flags) {
    dest.writeString(this.title);
    dest.writeString(this.desc);
}

protected ListData(Parcel in) {
    this.title = in.readString();
    this.desc = in.readString();
}

public static final Parcelable.Creator<ListData> CREATOR = new Parcelable.Creator<ListData>() {
    @Override
    public ListData createFromParcel(Parcel source) {
        return new ListData(source);
    }

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

}

Second step：send data：

    ArrayList<ListData> data = new ArrayList<ListData>();
    data.add(new ListData("Sidik Suhendar", "Telkom University"));
    Intent intent = new Intent(this, TargetActivity.class);
    intent.putParcelableArrayListExtra("data",data);

Third step：receive data

ArrayList<ListData> data = intent.getParcelableArrayListExtra("data");

Upvotes: 0

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