Android警报对话框未显示ICON

Question

以下AlertDialog未显示ICON。我尝试了这个stackoverflow链接中给出的选项。

Alert dialog is not displaying

我尝试了以下选项：

AlertDialog.Builder alertDialog  = new AlertDialog.Builder(TriviaActivity.this);

AlertDialog.Builder alertDialog  = new AlertDialog.Builder(this);

AlertDialog.Builder alertDialog  = new AlertDialog.Buildeer(getApplicationContext()![enter image description here][1]);

请让我知道为什么ICON没有显示。

public void callfacebook()
{
    if ( score > 100 )
    {   mpc.start();    }
    AlertDialog.Builder alertDialog  = new AlertDialog.Builder(TriviaActivity.this);
    alertDialog.setTitle("");
    alertDialog.setIcon(R.drawable.right);
    alertDialog.setMessage("\t Your Score is : " + score + " \n\n Please share this in Facebook");
    alertDialog.setPositiveButton("OK", new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog,int which) {
        Intent activityIntent = new Intent(TriviaActivity.this,facebookcall.class);
           activityIntent.putExtra("messageval","score");
           activityIntent.putExtra("level","level5");
           startActivity(activityIntent);
        }                   
        });
    alertDialog.show();
     }

Answer 1

由于你没有设置警告对话框的标题，一旦你有setTitle（“标题文字”），就会显示警告图标

Answer 2

 alertDialog.setTitle("Confirm");

您必须设置标题。