Android 如何在警报对话框中设置警报文本大小

默认情况下，对于具有小屏幕的特定设备，警报消息太大，我想将其设置为自定义dp

我的警报是这样的

OnClickListener addNewItemListener = new OnClickListener() {
                public void onClick(View v) {
                    AlertDialog.Builder alert = new AlertDialog.Builder(
                            MyActivity.this);

                    LinearLayout myLayout= new LinearLayout(MyActivity.this);
                    myLayout.setOrientation(LinearLayout.VERTICAL);

                    alert.setTitle(R.string.add_title);
                    alert.setMessage(R.string.add_message);

                    final TextView t1 = new TextView(MyActivity.this);
                    t1.setText("Name");
                    final EditText input1 = new EditText(MyActivity.this);
                    myLayout.addView(t1);
                    myLayout.addView(input1);
                    alert.setView(myLayout);
                    alert.setPositiveButton(R.string.cancel,
                            new DialogInterface.OnClickListener() {
                                public void onClick(DialogInterface dialog,
                                        int whichButton) {
                                }
                            });
                    alert.setNegativeButton(R.string.ok,
                            new DialogInterface.OnClickListener() {
                                public void onClick(DialogInterface dialog,
                                        int whichButton) {
                                    try {
                                        ....
                                    } catch (RuntimeException e) {
                                        Alerts.DatiErrati(MyActivity.this);
                                    }

                                }
                            });
                    alert.show();
                }
            };

---

如何设置警报消息的文本大小？

编辑2:

这是你能用的最好的方法

AlertDialog.Builder builder = new Builder(this);
builder.setMessage("Record and Images will be deleted?")
        .setTitle("MyTitle")
        .setCancelable(true)
        .setPositiveButton("Yes",
                        new DialogInterface.OnClickListener()
                        {

                            public void onClick(DialogInterface dialog,
                                    int id)
                            {

                                dialog.cancel();
                                finish();
                            }
                        })
                .setNegativeButton("No",
                        new DialogInterface.OnClickListener()
                        {

                            public void onClick(DialogInterface dialog,
                                    int id)
                            {
                                dialog.cancel();
                            }
                        });
        AlertDialog dialog = builder.create();
        dialog.show();
        TextView textView = (TextView) dialog.findViewById(android.R.id.message);
        textView.setTextSize(40);

您可以使用以下命令仅获取更大的文本

  alert.setMessage(Html.fromHtml("<Big>"+getString(R.string.add_message)+"</Big>"));

alert.setMessage（Html.fromHtml（“+getString（R.string.add_message）+”）；

注意：对于更大的文本，您可以使用更多的大字体

AlertDialog dialog = new AlertDialog.Builder(this).setMessage("Hello world").show();
TextView textView = (TextView) dialog.findViewById(android.R.id.message);
textView.setTextSize(40);

---

使用此代码控制alertDialog

  AlertDialog builder = new AlertDialog.Builder(getActivity())
                    .setTitle("title")
                    .setMessage("message")
                    .setPositiveButton(getResources().getString(R.string.yes), (dialogInterface, i) -> {
                        dialogInterface.dismiss();
                    })
                    .setNegativeButton(getResources().getString(R.string.cancel), (dialogInterface, i) -> dialogInterface.dismiss())


            try {

//                          /Modify Determine the font size of the Cancel button
//                builder.getButton(AlertDialog.BUTTON_POSITIVE).setTextSize(26);
//                builder.getButton(DialogInterface.BUTTON_NEGATIVE).setTextSize(26);

                // Get the mAlert object
                Field mAlert = AlertDialog.class.getDeclaredField("mAlert");
                mAlert.setAccessible(true);
                Object mAlertController = mAlert.get(builder);

                // Get mTitleView and set the size of the color
                Field mTitle = mAlertController.getClass().getDeclaredField("mTitleView");
                mTitle.setAccessible(true);
                TextView mTitleView = (TextView) mTitle.get(mAlertController);
                mTitleView.setTextSize(TypedValue.COMPLEX_UNIT_PX, getResources().getDimension(R.dimen._13sdp));
                mTitleView.setTextColor(getResources().getColor(R.color.font_black));
                mTitleView.setLineSpacing(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 8f, getResources().getDisplayMetrics()), 1.0f);
                mTitleView.setGravity(View.TEXT_ALIGNMENT_VIEW_START);
                mTitleView.setTextAlignment(View.TEXT_ALIGNMENT_VIEW_START);

                // Get mMessageView and set the size of the color
                Field mMessage = mAlertController.getClass().getDeclaredField("mMessageView");
                mMessage.setAccessible(true);
                TextView mMessageView = (TextView) mMessage.get(mAlertController);
                mMessageView.setPadding(mMessageView.getPaddingLeft(), (int) (mMessageView.getCompoundPaddingTop() + (TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_PX, 7, getResources().getDisplayMetrics()))), mMessageView.getCompoundPaddingRight(), mMessageView.getCompoundPaddingBottom());
                mMessageView.setTextSize(TypedValue.COMPLEX_UNIT_PX, getResources().getDimension(R.dimen._10sdp));
                mMessageView.setTextColor(getResources().getColor(R.color.font_black2));
                mMessageView.setLineSpacing(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 8f, getResources().getDisplayMetrics()), 1.0f);
                mMessageView.setGravity(View.TEXT_ALIGNMENT_VIEW_START);
                mMessageView.setTextAlignment(View.TEXT_ALIGNMENT_VIEW_START);
  


            } catch (Exception e) {
                e.printStackTrace();
            }

对于Proguard，请使用此代码

# for alertDialog, to customize title and message
-keep class androidx.appcompat.app.AlertDialog { *; }
-keep class androidx.appcompat.app.AppCompatDialog { *; }

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我已经尝试过这个解决方案，但问题是带有消息的TextView和Alerts的其他元素之间没有空白。你可以为此创建一个dialog.xml，并像这样将其膨胀到你的视图中。如果不膨胀xml，就没有办法做到这一点吗？@AndreaF接受你的答案根据你的需要更改文本大小need@AndreaF看见更新后的答案将解决您的问题，如果有帮助，则以默认方式接受iTunes，

textView.setTextSize（40）失败，出现
NPE
。
TextView
的id显然不是
android.R.id.message
。进一步的建议？试着按照以下链接：解释如何设置对话框的样式。