title: Android Studio - How to save value from button press and use value across app
body: <p>I have code with three buttons. I want to assign, I believe, onClickListener to each of them. So that when each respective button is clicked, I get a value I can save and use in other activities. </p>
  
  <p>Eventually I will use this value, to compare to another value selected via another activity, and depending on the matches (the two values), each will be assigned a random number between 1-6 and others.</p>
  
  <p>Here is my .XML below:</p>
  
  <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
  android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
  android:paddingRight="@dimen/activity_horizontal_margin"
  android:paddingTop="@dimen/activity_vertical_margin"
  android:paddingBottom="@dimen/activity_vertical_margin"
  tools:context="com.example.android.cc09june.TeamAOffense"&gt;
  
  &lt;TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:textAppearance="?android:attr/textAppearanceLarge"
      android:text="Team A Offense Selection"
      android:id="@+id/TeamAOffSel"
      android:layout_alignParentTop="true"
      android:layout_centerHorizontal="true" /&gt;
  
  &lt;Button
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="@string/PandR"
      android:id="@+id/PandRA"
      android:layout_marginTop="32dp"
      android:layout_below="@+id/TeamAOffSel"
      android:layout_alignParentLeft="true"
      android:layout_alignParentStart="true"
      android:onClick="exchange" /&gt;
  
  &lt;Button
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="@string/MandF"
      android:id="@+id/MandFA"
      android:layout_below="@+id/PandRA"
      android:layout_alignParentLeft="true"
      android:layout_alignParentStart="true"
      android:onClick="exchange" /&gt;
  
  &lt;Button
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="@string/SandC"
      android:id="@+id/SandCA"
      android:layout_below="@+id/MandFA"
      android:layout_alignParentLeft="true"
      android:layout_alignParentStart="true"
      android:onClick="exchange" /&gt;
  </code></pre>
  
  <p></p>
  
  <p>Here is my .java below:</p>
  
  <pre><code>package com.example.android.cc09june;
  
  import android.content.Intent;
  import android.os.Bundle;
  import android.support.v7.app.ActionBarActivity;
  import android.view.Menu;
  import android.view.MenuItem;
  import android.view.View;
  </code></pre>
  
  <p>public class TeamAOffense extends ActionBarActivity {</p>
  
  <pre><code>public void exchange (View view){
      //need to make it link to TeamA.xml
      Intent intent = new Intent(TeamAOffense.this, ExchangeAToB.class);
      startActivity(intent);
  }
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_team_aoffense);
  }
  
  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
      // Inflate the menu; this adds items to the action bar if it is present.
      getMenuInflater().inflate(R.menu.menu_team_aoffense, menu);
      return true;
  }
  
  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
      // Handle action bar item clicks here. The action bar will
      // automatically handle clicks on the Home/Up button, so long
      // as you specify a parent activity in AndroidManifest.xml.
      int id = item.getItemId();
  
      //noinspection SimplifiableIfStatement
      if (id == R.id.action_settings) {
          return true;
      }
  
      return super.onOptionsItemSelected(item);
  } }
  </code></pre>