postgresql - 替换文本字段中字符串的所有实例(postgresql - replace all instances of a string within text field)

 您可以尝试首先创建AlertDialog对象，然后使用它来设置更改按钮的颜色，然后显示它（请注意，在builder对象而不是调用show()我们调用create()来获取AlertDialog对象： 
 
//1. create a dialog object 'dialog'
MyCustomDialog builder = new MyCustomDialog(getActivity(), "Try Again", errorMessage); 
AlertDialog dialog = builder.setNegativeButton("OK", new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
                    ...
                }

            }).create();
//2. now setup to change color of the button
dialog.setOnShowListener( new OnShowListener() {
    @Override
    public void onShow(DialogInterface arg0) {
        dialog.getButton(AlertDialog.BUTTON_NEGATIVE).setTextColor(COLOR_I_WANT);
    }
}

dialog.show()
 
 你必须在“onShow（）”上执行此操作的原因，并且在创建对话框之后不能直接获取该按钮就是该按钮尚未创建。 
 
 我将AlertDialog.BUTTON_POSITIVE更改为AlertDialog.BUTTON_NEGATIVE以反映您的问题的变化。 虽然奇怪的是“OK”按钮将是一个负面按钮。 通常是正按钮。 

You can try to create the AlertDialog object first, and then use it to set up to change the color of the button and then show it. (Note that on builder object instead of calling show() we call create() to get the AlertDialog object:
 
//1. create a dialog object 'dialog'
MyCustomDialog builder = new MyCustomDialog(getActivity(), "Try Again", errorMessage); 
AlertDialog dialog = builder.setNegativeButton("OK", new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
                    ...
                }

            }).create();

//2. now setup to change color of the button
dialog.setOnShowListener( new OnShowListener() {
    @Override
    public void onShow(DialogInterface arg0) {
        dialog.getButton(AlertDialog.BUTTON_NEGATIVE).setTextColor(COLOR_I_WANT);
    }
});

dialog.show()
 
The reason you have to do it on onShow() and cannot just get that button after you create your dialog is that the button would not have been created yet. 
 
I changed AlertDialog.BUTTON_POSITIVE to AlertDialog.BUTTON_NEGATIVE to reflect the change in your question. Although it is odd that "OK" button would be a negative button. Usually it is the positive button.