Question

我想创建一个列表视图并用字符串数组填充它，所以我用ArrayAdapter对它进行了调整。这是我的代码。

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    String str[]={"A","S","S","P","S","S","P","Bl","Ra","M","a","a","c","s","s","ds"};

        ArrayAdapter<String> ad=new ArrayAdapter<>(this,android.R.layout.simple_list_item_1,str);

        ListView lv= (ListView)findViewById(R.id.lv);

 lv.setAdapter(ad);


    }
}

我想知道如果BaseAdapter是ArrayAdapter的超类，那么如何使用BaseAdapter制作相同的程序？

Answer 1

您必须像这样实施BaseAdapter：

public class CustomAdapter extends BaseAdapter {

private String[] data;

public CustomAdapter(String[] data) {
    this.data = data;
}

@Override
public int getCount() {
    return data.length;
}

@Override
public Object getItem(int position) {
    return data[position];
}

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

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

    LayoutInflater li = (LayoutInflater) convertView.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View view = li.inflate(android.R.layout.simple_list_item_1, null);//set layout for displaying items
    TextView txt = (TextView) view.findViewById(android.R.id.text1);//get id for Text view
    txt.setText(data[position]);
    return view;
}
}

如何将字符串数组添加到ListView uing BaseAdapter？

1 个答案: