Spotify can play a specific song when the app is started

only if the device has Spotify tho

app/src/main/java/com/example/soulfood_assignment2/MainActivity.java

 package com.example.soulfood_assignment2;
 
-import android.animation.ObjectAnimator;
 import android.content.Intent;
-import android.support.v4.view.ViewCompat;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 import android.util.Log;
-import android.view.MotionEvent;
 import android.view.View;
-import android.widget.EditText;
 import android.widget.ProgressBar;
 
 import com.spotify.android.appremote.api.ConnectionParams;
@@ -33,10 +29,7 @@ public class MainActivity extends AppCompatActivity {
     private int maxValue;
     private int progressValue;
 
-    private static final String CLIENT_ID = "3e5fe6fc098945ccaec377241f38d829";
-    private static final String REDIRECT_URI = "https://cs2s.yorkdc.net"; // URI to application domain
-    private SpotifyAppRemote mSpotifyAppRemote;
-
+    public  SpotifyClass spotifyClass;
     private static final int REQUEST_CODE = 1337;
 
     int swipeStartX = -50; //arbitrary default value
@@ -45,7 +38,6 @@ public class MainActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        Log.d("Testing!!!", "onCreate");
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_loading_screen);
 
@@ -74,7 +66,6 @@ public class MainActivity extends AppCompatActivity {
 
         };
         thread.start();
-
     }
 
     protected File doInBackground(Void...Voids) {
@@ -136,18 +127,30 @@ public class MainActivity extends AppCompatActivity {
         };
         thread.start();
     }
-	
+
     protected void onStart() {
-        Log.d("Testing!!!", "onStart");
+        spotifyClass = new SpotifyClass();
+
         super.onStart();
+        LogIn();
+    }
 
-        spotifyLogIn();
+    protected void onStop() {
+        super.onStop();
+        SpotifyAppRemote.disconnect(spotifyClass.mSpotifyAppRemote);
+    }
 
-        ConnectionParams connP = new ConnectionParams.Builder(CLIENT_ID).setRedirectUri(REDIRECT_URI).showAuthView(true).build();
+    public void LogIn() {
+        AuthenticationRequest.Builder builder = new AuthenticationRequest.Builder(spotifyClass.CLIENT_ID, AuthenticationResponse.Type.TOKEN, spotifyClass.REDIRECT_URI);
+        builder.setScopes(new String[]{"streaming"});
+        AuthenticationRequest request = builder.build();
+        AuthenticationClient.openLoginActivity(this, REQUEST_CODE, request);
+
+        ConnectionParams connP = new ConnectionParams.Builder(spotifyClass.CLIENT_ID).setRedirectUri(spotifyClass.REDIRECT_URI).showAuthView(true).build();
 
         SpotifyAppRemote.connect(this, connP, new Connector.ConnectionListener() {
             public void onConnected(SpotifyAppRemote spotifyAppRemote) {
-                mSpotifyAppRemote = spotifyAppRemote;
+                spotifyClass.mSpotifyAppRemote = spotifyAppRemote;
                 Log.d("Testing!!!", "Connected");
 
                 connected();
@@ -155,25 +158,14 @@ public class MainActivity extends AppCompatActivity {
 
             public void onFailure(Throwable throwable) {
                 Log.e("Testing!!!", throwable.getMessage(), throwable);
-                 //Something went wrong when attempting to connect! Handle errors here
+                //Something went wrong when attempting to connect! Handle errors here
             }
         });
     }
 
-    private void connected(){
-        mSpotifyAppRemote.getPlayerApi().play("spotify:playlist:37i9dQZF1DX2sUQwD7tbmL");
-    }
-
-    protected void onStop() {
-        super.onStop();
-        SpotifyAppRemote.disconnect(mSpotifyAppRemote);
-    }
-
-    private void spotifyLogIn() { //
-        AuthenticationRequest.Builder builder = new AuthenticationRequest.Builder(CLIENT_ID, AuthenticationResponse.Type.TOKEN, REDIRECT_URI);
-        builder.setScopes(new String[]{"streaming"});
-        AuthenticationRequest request = builder.build();
-        AuthenticationClient.openLoginActivity(this, REQUEST_CODE, request);
+    public void connected(){
+        Log.d("Testing!!!", "in connected method");
+        spotifyClass.playSong();
     }
 
     protected void onActivityResult(int requestCode, int resultCode, Intent intent) {

app/src/main/java/com/example/soulfood_assignment2/SpotifyClass.java

+package com.example.soulfood_assignment2;
+
+public class SpotifyClass {
+}