Android 在 fragment 中使用带有自定义布局的 AlertDialog

Question

晚上好

我正在尝试在 fragment 中使用警告对话框(TabNavigation 的原因)。我使用布局“隐私”是必要的。

但是 eclipse 在“AlertDialog.Builder”处给了我一个错误:(构造函数 AlertDialog.Builder(AboutActivity2) 未定义)

并在 inflate 之后的“.from”处:(类型 LayoutInflater 中的方法 from(Context) 不适用于参数(AboutActivity2))

感谢帮助，问候

    View rootView = inflater.inflate(R.layout.activity_about2, container, false);  
    rootView.findViewById(R.id.privacybutton).setOnClickListener(this);
    return rootView;
}

final OnClickListener mGlobal_OnClickListener = new OnClickListener() {
    public void onClick(View v) {
        switch(v.getId()) {
        case R.id.privacybutton:
            AlertDialog.Builder alertDialog = new AlertDialog.Builder(getActivity());
            LayoutInflater factory = LayoutInflater.from(getActivity());
            final View view = factory.inflate(R.layout.privacy, null);
            alertDialog.setView(view);
            alertDialog.setNegativeButton("Schließen", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog,int which) {
                dialog.dismiss();
                        }
                    });
            alertDialog.show();
            break;
    }
}

Answer 1

AlertDialog.Builder 接收上下文作为参数。而不是 fragment 。

http://developer.android.com/reference/android/app/AlertDialog.Builder.html#AlertDialog.Builder(android.content.Context)

改用 getActivity() :

    AlertDialog.Builder alertDialog3 = new AlertDialog.Builder(getActivity());
    LayoutInflater factory3 = LayoutInflater.from(getActivity());

您还需要将监听器添加到您的按钮。你可以这样做:

View rootView = inflater.inflate(R.layout.activity_about2, container, false);  
rootView.findViewByID(R.id.privacybutton).setOnClickListener(this);
return rootView;

最终代码

    View rootView = inflater.inflate(R.layout.activity_about2, container, false);
    rootView.findViewById(R.id.privacybutton).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            AlertDialog.Builder alertDialog = new AlertDialog.Builder(v.getContext());
            LayoutInflater factory = LayoutInflater.from(v.getContext());
            final View view = factory.inflate(R.layout.privacy, null);
            alertDialog.setView(view);
            alertDialog.setNegativeButton("Schließen", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                    dialog.dismiss();
                }
            });
            alertDialog.show();
        }
    });
    return rootView;