Android 活动：必须对子对象调用removeView（）；她先是父母

Android Studio 3.1，Java 1.8。 我想通过编程将视图添加到GridLayout。 所以我使用方法addView（）

这里是我的活动代码：

public class ProfileActivity extends AppCompatActivity {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        init();
    }

    private void init() {
        LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View view = getWindow().getDecorView().getRootView();
        View profileCategoryActive = inflater.inflate(R.layout.profile_category_active, (ViewGroup) view, false);
        TextView categoryNameTextView = profileCategoryActive.findViewById(R.id.categoryNameTextView);
        for (int index = 0; index < categoryCount; index++) {
            categoryNameTextView.setText("Hello " + index);
            gridLayout.addView(profileCategoryActive);
        }
    }
}

---

您多次添加同一视图

for (...) {
  // can't add _same_ view multiple times!
  gridLayout.addView(profileCategoryActive);
}

一个视图只能将一个父视图/子视图添加到另一个视图中，因此存在例外

---

如果要将多个视图添加到布局中，则需要将多个视图充气，然后分别添加

for (...) {
  View view = inflate(..) // inflate new view
  layout.addView(view); // add new view
}

---

您多次添加同一视图

for (...) {
  // can't add _same_ view multiple times!
  gridLayout.addView(profileCategoryActive);
}

一个视图只能将一个父视图/子视图添加到另一个视图中，因此存在例外

---

如果要将多个视图添加到布局中，则需要将多个视图充气，然后分别添加

for (...) {
  View view = inflate(..) // inflate new view
  layout.addView(view); // add new view
}

---

该错误消息是自补偿的

    if(profileCategoryActive.getParent()!=null)   
 ((ViewGroup)profileCategoryActive.getParent()).removeView(profileCategoryActive); // Remove view
 gridLayout.addView(profileCategoryActive);

---

该错误消息是自补偿的

    if(profileCategoryActive.getParent()!=null)   
 ((ViewGroup)profileCategoryActive.getParent()).removeView(profileCategoryActive); // Remove view
 gridLayout.addView(profileCategoryActive);