带有NumberPicker的AlertDialog呈现不正确 [英] AlertDialog with NumberPicker rendered incorrectly

问题描述

我在AlertDialog中使用NumberPicker进行渲染"时遇到问题.
我给你看代码:

I' have a problem about 'rendering' with my NumberPicker inside an AlertDialog.
I show to you the code:

                //setup del dialog
                AlertDialog.Builder builder = new AlertDialog.Builder(activity);
                builder.setCancelable(false);

                final NumberPicker picker = new NumberPicker(activity);
                picker.setMinValue(0);
                picker.setMaxValue(5);
                //set bottoni dialog
                builder.setPositiveButton(R.string.dialog_btn_seleziona, seleziona);
                builder.setNegativeButton(R.string.dialog_btn_annulla, null);

                //visualizzo il dialog
                Dialog dialog = builder.create();
                dialog.show();

问题在于，而不是得到这样的结果:


我得到以下结果:

蓝线选择器太长，我想要第一张照片的长度
我创建了以下主题:

the problem is that instead of to have a result like this:


I have this result:

The blue line selector is too long, i would like the same lenght of the first picture
i founded this topic:
NumberPicker rendered incorrectly in a Dialog
that explain how to fix this problem, and the solution is:

instead of this

android:layout_width="match_parent"

您应该使用

android:layout_width="wrap_content"
android:layout_gravity="center"

问题是我没有布局(由我自己为此数字选择器制作)，所以我需要以编程方式设置此参数，但是我不知道如何.

the problem is that i dont have a layout (made by myself for this numberpicker) so i need to set this parameters programmatically, but i don't know how.

推荐答案

对不起，我之前误会了.您只需要创建一个父视图，然后使用wrap_content将选择器放入其中即可.这是您在代码中的操作方式:

Sorry, I misunderstood earlier. You just need to create a parent view and put your picker inside of that, using wrap_content. Here is how you do that in code:

final NumberPicker picker = new NumberPicker(activity);
picker.setMinValue(0);
picker.setMaxValue(5);
final FrameLayout parent = new FrameLayout(activity);
parent.addView(picker, new FrameLayout.LayoutParams(
        FrameLayout.LayoutParams.WRAP_CONTENT,
        FrameLayout.LayoutParams.WRAP_CONTENT,
        Gravity.CENTER));
builder.setView(parent);

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