ListView未出现在应用程序中

Question

我是初学者，正在开发android，所以请带我一点：3

我已经创建了一个自定义listView并传递给它一些值，但是当我运行应用程序时，没有任何显示

但是当我用它放一个textView时，会出现文本视图，但列表视图不是apear：/

并且代码不显示任何错误！

这是我的MainActivity.java

ArrayList<Item> customList;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    customList=new ArrayList<Item>();



    for (int i=0; i<pics.length;i++){
        ImageView pic= new ImageView(this);
        pic.setImageResource(pics[i]);
        Item item= new Item(null,names[i],desc[i],times[i]);
        customList.add(item);
    }


    ListView lv = (ListView) findViewById(R.id.listview);
    CustomAdapter myAdapter = new CustomAdapter(customList);
    lv.setAdapter(myAdapter);


}




class CustomAdapter extends BaseAdapter{


    ArrayList<Item> myList;

    public CustomAdapter(ArrayList<Item> list) {
        this.myList=list;
    }

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

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        LayoutInflater infalter= getLayoutInflater();
        View view = infalter.inflate(R.layout.custom_row,null);

        ImageView image=(ImageView) findViewById(R.id.image);
        TextView name=(TextView) findViewById(R.id.title);
        TextView message=(TextView) findViewById(R.id.desc);
        TextView time=(TextView) findViewById(R.id.time);

        image=myList.get(position).getPic();
        name.setText(myList.get(position).getName());
        message.setText(myList.get(position).getMessage());
        time.setText(myList.get(position).getTime());





        return view;
    }
}

}

这是我的XML文件

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.hp.myapplication.MainActivity">




<ListView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/listview"
    tools:layout_editor_absoluteY="8dp"
    tools:layout_editor_absoluteX="8dp"/>

Answer 1

另一答案

Answer 2

另一答案