android - RecyclerView 在 Android 中只显示一行

Question

我想使用 RecyclerView 显示记录列表。

但是当我运行应用程序时，它只显示一条记录。

我验证了我的代码，一切似乎都很好。

适配器代码:

    public class AdapterData extends RecyclerView.Adapter<AdapterData.DummyHolder> {

    private LayoutInflater layoutInflater;
    private ArrayList<String> mItems = new ArrayList<>();
    public Context ThisContext;

    public AdapterData(Context context)
    {
        layoutInflater = LayoutInflater.from(context);
        mItems = generateValues();
        ThisContext = context;
    }

    public static ArrayList<String> generateValues(){
        ArrayList<String> Dummy = new ArrayList<>();
        for(int i=1; i<100; i++)
        {
            Dummy.add("Item"+i);
            Log.d("MTS", String.valueOf(i));
        }
        return Dummy;
    }

    @Override
    public DummyHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view= layoutInflater.inflate(R.layout.row_layout,parent,false);
        DummyHolder holder=new DummyHolder(view);
        return holder;
    }

    @Override
    public void onBindViewHolder(DummyHolder holder, int position) {
        holder.txt_name.setText(mItems.get(position));
        Log.d("MAN=",mItems.get(position));
    }

    @Override
    public int getItemCount() {
        return 100;
    }

    public static class DummyHolder extends RecyclerView.ViewHolder{

        TextView txt_name;

        public DummyHolder(View itemView) {
            super(itemView);
            txt_name = (TextView) itemView.findViewById(R.id.tx_name);
        }
    }
}

行代码:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/tx_name"
        android:hint="Hello"/>

</LinearLayout>

主要 Activity XML:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    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"
    tools:context="com.hogwarts.harrypotter.recyclerdemo.MainActivity">

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

    </android.support.v7.widget.RecyclerView>
</RelativeLayout>

主要 Activity 代码:

 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    recyclerView = (RecyclerView) findViewById(R.id.rv_list);
    LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
    recyclerView.setLayoutManager(linearLayoutManager);
    recyclerView.setAdapter(new AdapterData(this));
}

Answer 1

看看项目布局。根布局有 android:layout_height="match_parent"。这意味着项目占据全屏高度。更改为 wrap_content 并开始派对。说哦是啊