Question

我试图通过使用Bundle将数组专家从主要活动转移到另一个活动。我创建了一个实现Parceable的模型类。然后，我进入片段ArrayList<EssayElement> essayList =bundle.getParcelableArrayList("essayList");。该捆绑软件具有值，但列表无法获取该值。

模型类

package com.example.myapplication;


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

public class EssayElement implements Parcelable {
    //Declare variables
    public int id;
    public String title;
    public String essay;
    public String date;
    public String time;

    public EssayElement() {

    }

    protected EssayElement(Parcel in) {
        id = in.readInt();
        title = in.readString();
        essay = in.readString();
        date = in.readString();
        time = in.readString();
    }

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

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

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

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getEssay() {
        return essay;
    }

    public void setEssay(String essay) {
        this.essay = essay;
    }

    public String getDate() {
        return date;
    }

    public void setDate(String date) {
        this.date = date;
    }

    public String getTime() {
        return time;
    }

    public void setTime(String time) {
        this.time = time;
    }

    public int getId() {
        return id;
    }

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

    @Override
    public void writeToParcel(Parcel parcel, int i) {
        parcel.writeInt(id);
        parcel.writeString(title);
        parcel.writeString(essay);
        parcel.writeString(date);
        parcel.writeString(time);
    }
}

散文活动

public class Essay extends AppCompatActivity {
    //declare variables
    TextView tv;
    TextView tv1;
    TextView tv2;
    TextView tv3;


    private ViewPager viewPager; //The pager widget, which handles animation and allows swiping horizontally to access previous and next wizard steps.
    private FragmentAdapter fragmentAdapter; //The pager adapter, which provides the pages to the view pager widget.

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Bundle bundle = getIntent().getExtras();
        ArrayList<EssayElement> essayList = bundle.getParcelableArrayList("essayList");
        setContentView(R.layout.essay);
       viewPager = findViewById(R.id.pager);
        tv = (TextView) findViewById(R.id.title);
        tv1 = (TextView) findViewById(R.id.essay);
        tv2 = (TextView) findViewById(R.id.date);
        tv3 = (TextView) findViewById(R.id.time);
        FragmentAdapter fragmentAdapter = new FragmentAdapter(getSupportFragmentManager(), essayList);
        viewPager.setAdapter(fragmentAdapter);

Answer 1

实现通过包将可序列化为模型类。

 bundle.putSerializable("coupn_code",(Serializable) cartModelLists.get(i).getCouponModels());

像这样进入片段/活动，并将此列表传递给适配器。希望您能得到答案。

 couponModels = (ArrayList<CouponModel>)getArguments().getSerializable("coupn_code");

无法从包中获取arraylist

1 个答案: