Question

这是我将数据从活动发送到对话框片段

的方法

 MultipleColorFragment multipleColorFragment = new MultipleColorFragment();//Get Fragment Instance
  Bundle data = new Bundle();//Use bundle to pass data
  for(int i = 0;i<product_data_two.getColor().size();i++) {
  data.putStringArrayList(i + "", product_data_two.getColor().get(i));
  Log.d(TAG + " send fragment data",data.toString());
                            }
   data.putInt("size", product_data_two.getColor().size());
    multipleColorFragment.setArguments(data);//Finally set argument bundle to fragment

   final FragmentManager fm=getFragmentManager();
    multipleColorFragment.show(fm,"Color Set");

这是我收回数据的方法。

RecyclerView rv;
ArrayList<ArrayList<String>> getArgument;


@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    View rootView = inflater.inflate(R.layout.multiple_color_fragment_layout, container);

    //RECYCER
    rv = (RecyclerView) rootView.findViewById(R.id.multiple_color_recyclerview);
    rv.setLayoutManager(new LinearLayoutManager(this.getActivity()));
    rv.setLayoutManager(new GridLayoutManager(getActivity(), 6));
    rv.setAdapter(new MultipleColorAdapter());

    int size = getArguments().getInt("size");

    Log.d( " size : " + size ,"");

    for (int i = 0; i < size; i++)
        getArgument.add(getArguments().getStringArrayList(i + ""));

    this.getDialog().setTitle("Color Set");

    return rootView;
}

我发现我传递的数据是正确的。但是，我无法取回片段中的数据。任何人都能帮我解决问题吗？非常感谢你。

更新

ProductTypeTwo.java

public class ProductTypeTwo {

private String productName;
private String brandID;
private String description;
private String productImage;
private Long colorNo;
private String category;
private String uid;
private ArrayList<ArrayList<String>> color;

public ProductTypeTwo(String productName, String brandID, String description, String productImage, Long colorNo, String category, String uid, ArrayList<ArrayList<String>> color) {
    this.productName = productName;
    this.brandID = brandID;
    this.description = description;
    this.productImage = productImage;
    this.colorNo = colorNo;
    this.category = category;
    this.uid = uid;
    this.color = color;
}


public ProductTypeTwo()
{

}

public String getProductName() {
    return productName;
}

public void setProductName(String productName) {
    this.productName = productName;
}

public String getBrandID() {
    return brandID;
}

public void setBrandID(String brandID) {
    this.brandID = brandID;
}

public String getDescription() {
    return description;
}

public void setDescription(String description) {
    this.description = description;
}

public String getProductImage() {
    return productImage;
}

public void setProductImage(String productImage) {
    this.productImage = productImage;
}

public Long getColorNo() {
    return colorNo;
}

public void setColorNo(Long colorNo) {
    this.colorNo = colorNo;
}

public String getCategory() {
    return category;
}

public void setCategory(String category) {
    this.category = category;
}

public String getUid() {
    return uid;
}

public void setUid(String uid) {
    this.uid = uid;
}

public ArrayList<ArrayList<String>> getColor() {
    return color;
}

public void setColor(ArrayList<ArrayList<String>> color) {
    this.color = color;
}

}

来自我的logcat的

消息：

D / MultipleColorFragment颜色集大小：0
java.lang.NullPointerException：尝试调用虚方法＆＃39; boolean＆gt; ＆GT; java.util.ArrayList.add（java.lang.Object中）＆＃39;在空对象引用上

Answer 1

由于product_data_two.getColor()返回ArrayList<ArrayList<String>>，您可以将其添加到bundle，如下所示：

bundle.putSerializable("SOME_KEY",product_data_two.getColor());

在Fragment中，请按照以下方式进行操作：

getArgument = (ArrayList<ArrayList<String>>) bundle.getSerializable("SOME_KEY");

了解详情：Bundle

Answer 2

首先在单独的ArrayList中添加颜色，然后将其全部添加到要传递给Fragment的包中

MultipleColorFragment multipleColorFragment = new 

    MultipleColorFragment();//Get Fragment Instance
        Bundle data = new Bundle();//Use bundle to pass data
        ArrayList<String> colorArray = new ArrayList<>()

        for(int i = 0; i<product_data_two.getColor().size(); i++) {
          colorArray.add(product_data_two.getColor().get(i));
          }

        data.putStringArrayList("colorArray", colorArray);
        data.putInt("size", product_data_two.getColor().size());
        multipleColorFragment.setArguments(data);//Finally set argument bundle to fragment

    final FragmentManager fm=getFragmentManager();
    multipleColorFragment.show(fm,"Color Set");

在你的片段中，按键获取整个ArrayList，如下所示

ArrayList<String> colorArray =getArguments().getStringArrayList("colorArray");

将数据从活动传递到android

2 个答案: