问IllegalStateException(“您不能设置对话框的OnCancelListener或OnDismissListener")
EN

Stack Overflow用户

提问于 2013-01-25 03:11:18

回答 4查看 10.6K关注 0票数 35

此DialogFragment实现将导致

IllegalStateException(“您不能设置对话框的OnCancelListener或OnDismissListener")

。为什么？解决办法？

public class OkCThreadDialog1 extends DialogFragment{

DialogInterface.OnCancelListener onCancelListener;

public OkCThreadDialog1(){
}

public static OkCThreadDialog1 newInstance(String title, String message) {
    OkCThreadDialog1 frag = new OkCThreadDialog1();
    Bundle args = new Bundle();
    args.putString("title", title);
    args.putString("message", message);
    frag.setArguments(args);
    return frag;
}


public Dialog onCreateDialog(Bundle savedInstanceState){

    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());


    builder .setTitle(getArguments().getString("title"))
            .setMessage(getArguments().getString("message"))
            .setOnCancelListener(onCancelListener)
            .setPositiveButton("Ok", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                }})
            .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    getDialog().cancel();
                }});

    return builder.create();
}

@Override
public void onAttach(Activity activity) {
    super.onAttach(activity);
    // Verify that the host activity implements the callback interface
    try {
        onCancelListener = (DialogInterface.OnCancelListener) activity;
    } catch (ClassCastException e) {
        // The activity doesn't implement the interface, throw exception
        throw new ClassCastException(activity.toString()
                + " must implement OkCancelDialogListener");
    }
}
}

我的活动实现DialogInterface.OnCancelListener如下：

public class MainActivity extends Activity implements OkCancelDialogListener{

static final String TAG ="MainActivity";

@Override
public void onCancel(DialogInterface dialog) {


}
}

Exeception是从builder.create();抛出的。怎么了？

android

android-dialogfragment

回答 4

Stack Overflow用户

回答已采纳

发布于 2013-02-14 05:46:57

来自Android文档

公共对话框onCreateDialog (Bundle savedInstanceState) 覆盖以生成您自己的自定义对话框容器。这通常用于显示AlertDialog而不是一般的对话框；在这样做时，不需要实现onCreateView(LayoutInflater、ViewGroup、Bundle)，因为AlertDialog处理自己的内容。此方法将在onCreate(Bundle)之后和onCreateView(LayoutInflater，ViewGroup，Bundle)之前调用。默认实现只是实例化并返回Dialog类。 备注: DialogFragment拥有Dialog.setOnCancelListener和Dialog.setOnDismissListener回调。你不能亲自设置它们。 要了解这些事件，请重写onCancel(DialogInterface)和onDismiss(DialogInterface).

因此，基本上，您必须重写onDismiss或OnCancel，而不是“.setOnCancelListener(OnCancelListener)”。

票数 87

Stack Overflow用户

发布于 2015-07-20 06:07:36

你可以试试这个：

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    builder.setTitle("Title");
    builder.setMessage("Message");
    builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            // do something positive
        }
    });
    return builder.create();
}

@Override
public void onCancel(DialogInterface dialog) {
    // do something
}

希望能帮上忙..。

票数 6

Stack Overflow用户

发布于 2013-01-25 03:16:02

您为对话框设置OnCancelListener，而不是为其构建器设置。

public Dialog onCreateDialog(Bundle savedInstanceState){

    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    builder .setTitle(getArguments().getString("title"))
        .setMessage(getArguments().getString("message"))
        .setPositiveButton("Ok", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int id) {
            }})
        .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int id) {
                getDialog().cancel();
            }});

    Dialog dialog = builder.create();
    dialog.setOnCancelListener(onCancelListener);
    return dialog;
}