Question

我有一个ViewPager，有4页。所有片段内容都是动态创建的，其中包含一些TextView和ImageView。所有页面都创建得很好。但是，如果我尝试通过触摸TextView来刷页面，应用程序会在三星Galaxy S4 - OS V4.4.2单独下面的日志中崩溃。

我已经在LG Nexus5-OS V5.1和三星Galaxy NoteII-OS V4.3上进行了测试。即使我触摸TextView并滑动页面，应用程序也能正常工作。

Exception in MessageQueue callback: handleReceiveCallback
 java.lang.ClassCastException: android.widget.TextView cannot be cast to android.view.ViewGroup
 at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1016)
 at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1207)
 at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:738)
 at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1572)
 at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:545)
 at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:163)
 at android.support.v4.view.ViewPager.populate(ViewPager.java:1106)
 at android.support.v4.view.ViewPager.populate(ViewPager.java:952)
 at android.support.v4.view.ViewPager$3.run(ViewPager.java:251)
 at android.support.v4.view.ViewPager.completeScroll(ViewPager.java:1849)
 at android.support.v4.view.ViewPager.onInterceptTouchEvent(ViewPager.java:1984)
 at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2043)

下面是我的片段代码。

public class HorizontalSwipPage extends Fragment {

private View mPage = null;
LinearLayout root = null;

public void setArguments(View page) {
    mPage = page;
}

public HorizontalSwipPage() {
    super();
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    root = null;
    root = new LinearLayout(getActivity());
    root.removeAllViews();
    root.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,
            LayoutParams.MATCH_PARENT));
    root.addView(mPage);

    return root;
}

@Override
public void onDestroyView() {
    // TODO Auto-generated method stub
    root.removeAllViews();
    root = null;
    super.onDestroyView();
}

}

此处 mPage 是动态创建的布局视图。下面是我的适配器代码。

public class TestPagerAdapter extends FragmentStatePagerAdapter implements
    IconPagerAdapter {

public int noOfPages = 0;

private View[] PageList = null;



public TestPagerAdapter(Context context, FragmentManager fm,
        int pNoOfPages) {
    super(fm);
    noOfPages = pNoOfPages;
    PageList = new View[noOfPages];

}

public void addPage(View grid, int index) {
    PageList[index] = grid;
}

@Override
public Fragment getItem(int position) {
    HorizontalSwipPage f = new HorizontalSwipPage();
    f.setArguments(PageList[position]);
    return f;
}

@Override
public int getCount() {
    return noOfPages;
}
}

请有人帮我解决这个问题。

Answer 1

java.lang.ClassCastException：无法转换android.widget.TextView 到android.view.ViewGroup

当您尝试将类从一种类型不正确地转换为另一种类型时，这是Java程序中可能发生的异常。

我认为您缺少设置 TextView 正确ID 。

应用程序崩溃ClassCastException：android.widget.TextView无法在ViewPager中强制转换为android.view.ViewGroup

1 个答案: