How to set Alert text size in alert dialog

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 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();
}
};
How could I set the text size of the alert message?