Question

我正在尝试在对话框按钮上设置onclicklistner。如果使用

设置了侦听器

bnxt.setOnClickListener(new x());

该应用程序可以正常运行，但是如果使用下面给出的第二种实现，则该应用程序将崩溃。任何提示或帮助都将受到高度赞赏。

bnxt.setOnClickListener(new OnClickListener() { ...

提供的代码：

class x implements OnClickListener {
    x() {
    }
    public void onClick(View v) {
        if (listener != null) {
            final Dialog dialog = new Dialog(getActivity());
            FancyButton m_no = (FancyButton) dialog.findViewById(R.id.b_no);
            m_no.setOnClickListener(new OnClickListener() {
                public void onClick(View v) {
            dialog.dismiss();
                }
            });
            dialog.show();
        }
    }

}

public View onCView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_x, container, false);
    final FancyButton bnxt = (FancyButton) view.findViewById(R.id.btn_popup);

  //bnxt.setOnClickListener(new x());

    bnxt.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
            if (listener != null) {
                final Dialog dialog = new Dialog(getActivity());
                FancyButton m_no = (FancyButton) dialog.findViewById(R.id.b_no);

           m_no.setOnClickListener(new OnClickListener() {
                    public void onClick(View v) {
                        dialog.dismiss();
                    }
                });
                dialog.show();
            }
        }
    });
    return view;
}

Answer 1

使用嵌套的onClicklistener没问题。下面是示例代码。保持布局简单即可测试。

 @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {
             View view = inflater.inflate(R.layout.fragment_test, container, false);

            view.findViewById(R.id.btn1).setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Dialog dialog = new Dialog(getActivity());
                    dialog.setContentView(R.layout.dialog_view);
                    dialog.findViewById(R.id.dialog_btn).setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View v) {
                            Toast.makeText(getActivity(), "Dialog btn clicked", Toast.LENGTH_LONG).show();
                        }
                    });

                    dialog.show();
                }
            });
            return view;
        }

fragment_test.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".TestActivityFragment">

    <Button
        android:id="@+id/btn1"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:text="btn1"
        app:layout_constraintStart_toStartOf="parent" />


    <Button
        android:id="@+id/btn2"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:layout_marginLeft="10dp"
        android:layout_marginStart="10dp"
        android:text="btn2"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@id/btn1" />
</android.support.constraint.ConstraintLayout>

dialog_view.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:id="@+id/dialog_btn"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Dialog BTn" />

</android.support.constraint.ConstraintLayout>

Java / Android中的嵌套setOnClickListener

1 个答案: