Question

我的GridView适配器中有frames.add(new TextureRegion(atlas.findRegion("PriestOverworld3"), i * 16, 0, 16, 16));，我需要将此列表发送到另一个片段，我该怎么做？因为我不能通过捆绑发送它。

Answer 1

ArrayList<arrayList > arrayList = new ArrayList<>();

将arrayList传递给bundle

Bundle bundle = new Bundle();
bundle.putSerializable("key", arrayList);

和接收片段

ArrayList<arrayList > arrayList = (ArrayList<arrayList>)getArguments().getSerializable("key");

Answer 2

假设您的arraylist属于模型类Sample.Then模型类应该像这样实现Parcelable类

public class Sample implements Parcelable {
private String name;
private int value;

protected Sample(Parcel in) {
    name = in.readString();
    value = in.readInt();
}

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

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

public String getName() {
    return name;
}

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

public int getValue() {
    return value;
}

public void setValue(int value) {
    this.value = value;
}

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

@Override
public void writeToParcel(Parcel parcel, int i) {
    parcel.writeString(name);
    parcel.writeInt(value);
}}

然后将数据从一个类发送到另一个类

ArrayList<Sample>arrayList=new ArrayList<>();
Bundle bundle = new Bundle();
bundle.putParcelableArrayList("key", arrayList);

然后在另一节课中获取数据

ArrayList<arrayList>arrayList=(ArrayList<Sample>)getArguments().putParcelableArrayList("key");

Answer 3

您可以使用Instance类在整个应用程序中传递数据

  public class RuntimeData {

    private Context context;
     private List<PoJo> questionHolders = new ArrayList<>();


    private RuntimeData(Context context) {
        this.context = context;
    }

    private static RuntimeData instance;

    public static void init(Context context) {
        if (instance == null) {
            instance = new RuntimeData(context);
        }
    }

    public static RuntimeData getInstance() {
        return instance;
    }



    public void setQuestionHolders(List<PoJo> questionHolders) {
        this.questionHolders = questionHolders;
    }

    public List<PoJo> getQuestionHolders() {
        return questionHolders;
    }

}

Pojo.class

public class PoJo {

    private String name;

    private setName(String name) {
        this.context = name;
    }
    public String getName()
    {
        return name;
    }

}

对于设定值：

RuntimeData.getInstance().setQuestionHolders(<here your arraylist>);

获取价值：

RuntimeData.getInstance().getQuestionHolders();

将ArrayList <e>从类传递到另一个片段

3 个答案: