使用微调器和提交按钮更新整数值（Android Studio SDK）

Question

I have been studying Java for Android for a few weeks now and I am working on my first app. Looking thru answers to similar questions on this website, I'm starting to think I'm approaching my problem from the wrong angle. Before I scrap my work, I'd like to ask some questions about my approach. I appreciate your help <3

If I create a Spinner from an array in the strings.xml file, can I use the value of the spinner (after a Submit Button is pressed) to update an integer that I have also stored in my strings.xml file, and display it in a TextView area?

strings.xml:

<integer-array name="numbers_spinner">
    <item>1</item>
    <item>2</item>
    <item>3</item>
</integer-array>

<integer name="my_number">0</integer>

activity_myApp.xml:

<Spinner
    android:id="@+id/numbers_spinner"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:entries="@array/numbers_spinner"
    android:background="@android:drawable/btn_dropdown"
    android:spinnerMode="dropdown" />

<Button
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/submit_button"
    android:onClick="sendMessage"/>

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@integer/my_number"/>

Context: I'm hoping to add the value from the Spinner to a total value, but I haven't worked out how to do that yet. I am currently stuck on creating an event listener to get the value from my Spinner using a Submit Button.

Is it possible to update the value of int my_number in this way, or do I have to create the Spinner Array in the .java Main Activity file ? I'm happy to do that if necessary, but as I've got it set up this way I'm hoping to continue down this path unless you guys believe it to be a poor choice. I'm grateful for any help you can give, using the strings.xml file OR the MainActivity.java file <3

Answer 1

您可以通过单击以下按钮来做到这一点：

textview.setText(String.valueOf(spinner.getSelectedItem()));