android - 如何从 AlertDialog 构建器中删除黑色边框

Question

我使用 AlertDialog.builder 创建了一个自定义对话框。在这个对话框中，我没有显示标题。一切正常，但对话框中有黑色边框。那么谁能告诉我如何删除这个黑色边框？代码和截图如下。

Java 代码:

AlertDialog.Builder start_dialog = new AlertDialog.Builder(this);
            
Context mContext = getApplicationContext();
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.custom_dialog2,
                                           (ViewGroup) findViewById(R.id.layout_root));
            
layout.setBackgroundResource(R.drawable.img_layover_welcome_bg);

Button btnPositiveError = (Button)layout.findViewById(R.id.btn_error_positive);   
btnPositiveError.setTypeface(m_facedesc);
            
start_dialog.setView(layout);
            
final AlertDialog alert = start_dialog.create();
alert.show();
            
btnPositiveError.setOnClickListener(new Button.OnClickListener()
{
    public void onClick(View v) 
    {
        alert.dismiss();
    }
});

屏幕截图

Answer 1

Without creating a custom background drawable and adding a special style just add

一行代码:

dialog.getWindow().setBackgroundDrawableResource(android.R.color.transparent);

关于对话框的更多信息:

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