Android App:使用对话框片段中的自定义背景替换默认按钮背景 [英] Android App: Replace default button background with custom background in a Dialog Fragment

问题描述

我想做的是更改我编写的自定义DialogFragment的默认背景.通常，我会通过更改XML布局文件来完成此操作，但是，对于DialogFragment，这些按钮在布局文件中不存在.

What I'm trying to do is change the default backgrounds of a custom DialogFragment that I have written. Normally, I would do this by changing the XML layout file, however, for a DialogFragment these buttons don't exist in the layout file.

本质上，我试图访问setPositiveButton，setNegativeButton和setNeutral按钮以对其进行修改.另外，我接下来将尝试通过id获得它们，但是，由于它们不是在布局文件中定义的，因此我没有相应的id.我已经找到了许多有关如何修改其余布局的示例，但是在任何地方都找不到可以修改正/中性/负按钮的地方.

In essence, I'm trying to get access to the setPositiveButton, setNegativeButton and setNeutral buttons in order to modify them. Alternatively, I would next try to do this by getting them by id, however, since they aren't defined in a layout file, I do not have a corresponding id for them. I've found plenty examples of how to modify the rest of the layout, but I can't find anywhere that positive/neutral/negative buttons are modifiable.

理想情况下，我可以在下面的代码块中做到这一点:

Ideally, I could do this in the following block of code:

.setPositiveButton(R.string.add, new DialogInterface.OnClickListener() {
                   @Override
                   public void onClick(DialogInterface dialog, int id) {
                       ...
                   }
               })

谢谢.

推荐答案

此处是代码...按钮实例仅在创建对话框之后才有效.希望这对您有所帮助.

Here is the code ... The button instance is valid only after the dialog created. Hope this helps you.

public static class CustomDialog extends DialogFragment
{

    public static CustomDialog newInstance()
    {
        return new CustomDialog();
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState)
    {
        super.onCreateDialog(savedInstanceState);
        Builder builder = new AlertDialog.Builder(getActivity());

        AlertDialog dialog = builder.create();

        dialog.setButton(DialogInterface.BUTTON_POSITIVE, "OK",new OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {


            }
        });

        dialog.setButton(DialogInterface.BUTTON_NEGATIVE, "CANCEL",new OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {


            }
        });


        return dialog;

    }

    @Override
    public void onStart()
    {
        super.onStart();
        Button pButton =  ((AlertDialog) getDialog()).getButton(DialogInterface.BUTTON_POSITIVE);
        Button nButton =  ((AlertDialog) getDialog()).getButton(DialogInterface.BUTTON_NEGATIVE);

        pButton.setBackgroundColor(getResources().getColor(R.color.Blue));
        nButton.setBackgroundColor(getResources().getColor(R.color.Green));
    }
}

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