Question

我想动态添加一些视图。

LinearLayout mDescriptionLayout = (LinearLayout)findViewById(R.id.descriptionLayout); 

LayoutInflater inflater = (LayoutInflater)getSystemService(LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate (R.layout.bonus_info_item, null,false);
TextView counter = (TextView) view.findViewById(R.id.counter);
TextView descriptionText = (TextView) view.findViewById(R.id.descriptionText);
String [] s = {"","A","B", "C","D"};

for (int i = 1; i < 5; i++){
    counter.setText(String.valueOf(i));
    descriptionText.setText(s[i]);
    mDescriptionLayout.addView(view);
}

这是我的main.xml，我想在LinearLayout（@id/descriptionLayout）

中添加这个虚增的观点

<ScrollView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fillViewport="true">
    <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

        <TextView
                android:id="@+id/days"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"   
                android:textSize="12sp"/>

        <LinearLayout
                android:id="@+id/descriptionLayout"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_below="@id/bonusCardTitleText"
                android:orientation="vertical">

        </LinearLayout>
        </RelativeLayout>
    </ScrollView>

我不明白这里的问题是我无法添加视图动态，而且我总是遇到此错误。

Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
        at android.view.ViewGroup.addViewInner(ViewGroup.java:3339)
        at android.view.ViewGroup.addView(ViewGroup.java:3210)
        at android.view.ViewGroup.addView(ViewGroup.java:3155)
        at android.view.ViewGroup.addView(ViewGroup.java:3131)

Answer 1

正如错误所说，

The specified child already has a parent. You must call removeView() on the child's parent first.

您正尝试将子View添加到父级，并且该子级已经拥有父级（在for loop的第一次迭代之后）。每次声明和初始化View内的for loop或每次调用remove()都应该修复它。我不确定您是否尝试多次添加此layout，但如果是这样，那么您可以尝试

for (int i = 1; i < 5; i++)
{
    View view = inflater.inflate (R.layout.bonus_info_item, null,false);
    TextView counter = (TextView) view.findViewById(R.id.counter);
    TextView descriptionText = (TextView) view.findViewById(R.id.descriptionText);
    counter.setText(String.valueOf(i));
    descriptionText.setText(s[i]);
    mDescriptionLayout.addView(view);
}

另一种方式是拨打mDescriptionLayout.removeView(view);，但我认为你不想在你的情况下这样做。通过View每次迭代初始化一个新的loop可以解决您的问题。

Answer 2

您要向TextView多次添加相同的LinearLayout个对象。您需要为每个项目创建TextView的新实例。

for (int i = 1; i < 5; i++){
    View view = inflater.inflate (R.layout.bonus_info_item, null,false);
    TextView counter = (TextView) view.findViewById(R.id.counter);
    TextView descriptionText = (TextView) view.findViewById(R.id.descriptionText);
    counter.setText(String.valueOf(i));
    descriptionText.setText(s[i]);
    mDescriptionLayout.addView(view);
}

如何动态添加此视图

2 个答案: