How To Set Alert Text Size In Alert Dialog

The alert message by default is too big for specific devices with little screens and I want to set it to a custom dp My alert is something like this OnClickListener addNewItemListe

Solution 1:

EDIT 2:

This is the best method you can go with

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

                            publicvoidonClick(DialogInterface dialog,
                                    int id)
                            {

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

                            publicvoidonClick(DialogInterface dialog,
                                    int id)
                            {
                                dialog.cancel();
                            }
                        });
        AlertDialogdialog= builder.create();
        dialog.show();
        TextViewtextView= (TextView) dialog.findViewById(android.R.id.message);
        textView.setTextSize(40);

You can use the following to get bigger text only

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

Note: you can use more big's for more bigger text

Solution 2:

Try this:

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

Solution 3:

Use this code to control alertDialog

AlertDialogbuilder=newAlertDialog.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 objectFieldmAlert= AlertDialog.class.getDeclaredField("mAlert");
                mAlert.setAccessible(true);
                ObjectmAlertController= mAlert.get(builder);

                // Get mTitleView and set the size of the colorFieldmTitle= mAlertController.getClass().getDeclaredField("mTitleView");
                mTitle.setAccessible(true);
                TextViewmTitleView= (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 colorFieldmMessage= mAlertController.getClass().getDeclaredField("mMessageView");
                mMessage.setAccessible(true);
                TextViewmMessageView= (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();
            }

For Proguard use this code

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