如何在android中向XML布局添加继承类

我正在关注这个链接：

我扩展了链接中提到的

微调器

类。下面是我的代码：

    public class SpinnerTrigger extends Spinner {

    public SpinnerTrigger(Context context) {
    super(context);
    // TODO Auto-generated constructor stub
    }

    @Override
public void setSelection(int position, boolean animate) {
    ignoreOldSelectionByReflection();
    super.setSelection(position, animate);
}

private void ignoreOldSelectionByReflection() {
        try {
        Class<?> c = this.getClass().getSuperclass().getSuperclass().getSuperclass();
        Field reqField = c.getDeclaredField("mOldSelectedPosition");
        reqField.setAccessible(true);
        reqField.setInt(this, -1);
    } catch (Exception e) {
        Log.d("Exception Private", "ex", e);
        // TODO: handle exception
    }
}

@Override
public void setSelection(int position) {
    ignoreOldSelectionByReflection();
    super.setSelection(position);
}

}

---

如果我遗漏了什么，请建议我。

将此添加到您的布局中：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:tag="http://schemas.android.com/apk/res/com.mypack.cc"  <!--   HERE -->

请包括错误的整个堆栈跟踪
Caused by: android.view.InflateException: Binary XML file line #12:Error inflating class com.mypack.cc.SpinnerTrigger

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:tag="http://schemas.android.com/apk/res/com.mypack.cc"  <!--   HERE -->