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在用户填写空白后,出现此屏幕:
这是一个警告对话框。代码在这里:
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle("Congratulations!");
builder.setMessage("You finished Level 1. Do you want to start Level 2?");
builder.setNegativeButton("Not now", new DialogInterface.OnClickListener(){
public void onClick(DialogInterface dialog, int id) {
}
});
builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
}
});
builder.show();
当用户单击"is"按钮时,我想通过“2 级”选项卡。
这是我在 onClick 中尝试的:
FragmentManager fm = getChildFragmentManager();
fm.beginTransaction().replace(R.layout.activity_level2, new Level2()).commit();
我收到这个错误:
java.lang.IllegalArgumentException: No view found for id 0x7f04001f (translatingthecaps.translatethecaps:layout/activity_level2) for fragment Level2{60d2f9f #0 id=0x7f04001f}
我在 Level 2 Fragment 中只有这段代码:
public class Level2 extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.activity_level2, container, false);
return view;
}
}
在出现警报对话框之前,我可以看到“2 级”选项卡。