java - 自定义View如何访问变量？

Question

我创建了自定义 View ，在谷歌地图上我想在顶部信息上添加用户点击的内容，但我在自定义 View 方面遇到了大问题，如何从 Activity 访问变量。

 public class Shop extends LinearLayout {

    private TextView name;

    public Shop(Context context) {
        super(context);
        setContentView();
    }

    public Shop(Context context, AttributeSet attrs) {
        super(context, attrs);
        setContentView();
    }

    public Shop(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        setContentView();
    }

    private void setContentView() {

        LayoutInflater layoutInflater =    (LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View view = layoutInflater.inflate(R.layout.list_item_display_brand, this);


        name = (TextView) view.findViewById(R.id.shop);
        name.setText(".");

  }

    public void shopSetText() {
        name.setText("PetShop");

    }

}

我添加到 Activity 中:

public class MapViewActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstance) {
        super.onCreate(savedInstance);
        setContentView(R.layout.activity_map);

        Shop map = new Shop(getApplicationContext());

        map.shopSetText();
    }

'为什么我无法从 shopSetText 设置名称？现在它只显示“.”

Answer 1

更改此:

public void shopSetText() {
    name.setText("PetShop");
}

收件人:

 public void shopSetText(String sTextToSet) {
    name.setText(sTextToSet);
}

在您的 Activity 中:

public class MapViewActivity extends Activity {

@Override
public void onCreate(Bundle savedInstance) {
    super.onCreate(savedInstance);
    setContentView(R.layout.activity_map);

    Shop map = new Shop(getApplicationContext());

    map.shopSetText("Same text to set here. Lorem ipsum");
}