只需将设置为 TexInputEditText .

<com.google.android.material.textfield.TextInputLayout
        android:id="@+id/textInputLayout"
        ..>
        <com.google.android.material.textfield.TextInputEditText/>
    </com.google.android.material.textfield.TextInputLayout>

比如：

textInputLayout.getEditText().setText("text");

要在textinputlayout中设置文本，需要在其中创建edittext。
比如：

TextInputLayout parent = (TextInputLayout) findViewById(R.id.parent);
        EditText editText = new EditText;
        editText.setText("the text");
        editText.setLayoutParams(new TextInputLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
        parent.addView(editText);
        }