Android：如何更改 AlertDialog 消息和按钮的字体系列

Question

我在单击按钮时显示一个 AlertDialog，该按钮将具有正面和负面按钮，它们是带有消息的 AlertDialog 的默认按钮。

我想更改这些按钮和消息的字体系列，我该如何更改？

下面是我的代码：

AlertDialog.Builder altDialog = new AlertDialog.Builder(context);
altDialog.setMessage(Constants.WARNING_STEPS);
altDialog.setTitle(Constants.WARNING);
altDialog.setCancelable(true);

altDialog.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
  @Override
    public void onClick(DialogInterface dialog, int which) {

});

altDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {

    }
});

altDialog.show();

Answer 1

这里的重点是android.R.id文件中textviews和buttons的地址，即android.R.id.button1和android.R.id.button2和android.R.id.button3以及android .R.id.message

       AlertDialog dialog = new AlertDialog.Builder(MainActivity.this)                                                                                                         
                    .setMessage("آیا مایل به خروج از حساب کاربری هستید؟")
                    .setCancelable(true)
                    .setPositiveButton("بله", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                          ...

                        }

                    })
                    .setNegativeButton("خیر", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {

                           ...
                        }

                    }).show();

            TextView textView = (TextView) dialog.findViewById(android.R.id.message);
            textView.setTypeface(FontHelper.getIranSansTypeface(MainActivity.this));

            Button btn1 = (Button) dialog.findViewById(android.R.id.button1);
            btn1.setTypeface(FontHelper.getIranSansTypeface(MainActivity.this));

            Button btn2 = (Button) dialog.findViewById(android.R.id.button2);
            btn2.setTypeface(FontHelper.getIranSansTypeface(MainActivity.this));

Answer 2

为了实现这一点，你需要两件事：

• 通过 alertbuilder 创建 AlertDialog。来自官方 Android 文档 (http://developer.android.com/guide/topics/ui/dialogs.html) 的示例：

  AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
  builder.setMessage(R.string.dialog_fire_missiles)
         .setPositiveButton(R.string.fire, new DialogInterface.OnClickListener() {
             public void onClick(DialogInterface dialog, int id) {
                 // FIRE ZE MISSILES!
             }
         })
         .setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
             public void onClick(DialogInterface dialog, int id) {
                 // User cancelled the dialog
             }
         });
  // Create the AlertDialog object and return it
  return builder.create();
  

  • 在警报对话框中设置 TextView 的字体如下：

    AlertDialog dialog = builder.create();
    TextView textView = (TextView)  dialog.findViewById(android.R.id.message);
    Typeface face=Typeface.createFromAsset(getAssets(),"fonts/coolFont"); 
    textView.setTypeface(face); 
    dialog.show();
    

Answer 3

AlertDialog dialog = new AlertDialog.Builder(this).setMessage("Hello world").show();
TextView textView = (TextView) dialog.findViewById(android.R.id.message);
Typeface face=Typeface.createFromAsset(getAssets(),"fonts/yourFONT"); 
textView.setTypeface(face);