Question

我是Android的新手，所以也许我只是缺乏理解事情的运作方式。

所以我现在拥有的是五个元素的RecyclerView。每个都包含不同形状，不同水果名称和不同颜色条的图形。

我所寻求的是创建片段，在该图中显示一些背景颜色，图形和水果名称，具体取决于Recyclerview元素用户点击的内容。我怎么能这样做？

MyAdapter类如下所示：

    public class MyAdapter extends RecyclerView.Adapter <MyAdapter.MyViewHolder> {


    Context context;
    ArrayList<Information> data;

    public MyAdapter(Context context, ArrayList<Information> data) {
        this.context = context;
        this.data = data;
    }

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.custom_row,parent,false);
        MyViewHolder holder = new MyViewHolder(view);
        return holder;
    }

    @Override
    public void onBindViewHolder(final MyViewHolder holder, final int position) {
        holder.textView.setText(data.get(position).title);
        holder.relativeLayout.setBackground(context.getResources().getDrawable(data.get(position).shape));
        holder.textView2.setBackground(context.getResources().getDrawable(data.get(position).color));

    }

    @Override
    public int getItemCount() {
        return data.size();
    }
    class MyViewHolder extends RecyclerView.ViewHolder {

        TextView textView,textView2;
        RelativeLayout relativeLayout;

        public MyViewHolder(View itemView) {
            super(itemView);
            textView = (TextView) itemView.findViewById(R.id.txt_view);
            relativeLayout = (RelativeLayout) itemView.findViewById(R.id.img_view);
            textView2 = (TextView) itemView.findViewById(R.id.textView);

        }
    }
}

MyActivity.java

    public class MyActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);
        RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
        MyAdapter adapter = new MyAdapter(this, Data.getData(this));
        recyclerView.setAdapter(adapter);
        recyclerView.setLayoutManager(new GridLayoutManager(this,1));

}
}

Fragment_layout.java

public class FragmentLayout extends Fragment {

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    return inflater.inflate(R.layout.fragment_layout, container, false);
}
}

activity_my.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
>

<android.support.v7.widget.RecyclerView
    android:id="@+id/recycler_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

</android.support.v7.widget.RecyclerView>
</android.support.design.widget.CoordinatorLayout>

和 fragment_layout.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/fragment_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
>


<RelativeLayout
    android:id="@+id/fragment_img"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:layout_gravity="center"
    android:rotation="180"
    android:layout_centerVertical="true"
    android:layout_centerHorizontal="true">

    <TextView
        android:id="@+id/fragment_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:rotation="180"
        android:textSize="20sp"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true" />
</RelativeLayout>


</RelativeLayout>

Answer 1

您需要在ViewHolder中为itemView创建一个onClickListener。然后，您可以使用适配器位置获取所需的详细信息，并将它们传递给您希望显示的新片段。如下例所示。

`

class MyViewHolder extends RecyclerView.ViewHolder implements` View.OnClickListener {

        TextView textView,textView2;
        RelativeLayout relativeLayout;

        public MyViewHolder(View itemView) {
            super(itemView);
            textView = (TextView) itemView.findViewById(R.id.txt_view);
            relativeLayout = (RelativeLayout) itemView.findViewById(R.id.img_view);
            textView2 = (TextView) itemView.findViewById(R.id.textView);

            itemView.setOnClickListener(this);

        }

        @Override
        public void onClick(View v)
        {
                FruitDetailFragment detailFragment = FruitDetailFragment.newInstance(fruits.get(getAdapterPosition()).getTitle(),
                        fruits.get(getAdapterPosition()).getcolor());

                getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.my_container, detailFragment,
                        getString(R.string.fruit_detail_fragment_tag)).addToBackStack("FRUIT_DETAILS").commit();
        }
    }

如何创建显示在RecyclerView上单击元素的Fragment？

1 个答案: