rename layout, names must content only [a-z][0-9] and underscore

app/src/main/java/net/foucry/pilldroid/CustomScannerActivity.java

@@ -38,7 +38,7 @@ public class CustomScannerActivity extends Activity implements DecoratedBarcodeV
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
-        setContentView(R.layout.CustomScannerActivty);
+        setContentView(R.layout.custom_scanner_activty);
 
         //barcodeScannerView.setTorchListener(this);
 

app/src/main/java/net/foucry/pilldroid/DrugDetailActivity.java

@@ -41,7 +41,7 @@ public class DrugDetailActivity extends AppCompatActivity {
         aMedic = (Medic) bundle.get("medic");
         Log.d(TAG, "aMedic == " + aMedic);
 
-        setContentView(R.layout.DrugDetailActivity);
+        setContentView(R.layout.drug_detail_activity);
         Toolbar toolbar = findViewById(detail_toolbar);
 
         if (toolbar != null) {

app/src/main/java/net/foucry/pilldroid/DrugListActivity.java

@@ -108,7 +108,7 @@ public class DrugListActivity extends AppCompatActivity {
                 .build();
 
         // Set view content
-        setContentView(R.layout.DrugListActivity);
+        setContentView(R.layout.drug_list_activity);
 
         Toolbar toolbar = findViewById(R.id.toolbar);
 

app/src/main/java/net/foucry/pilldroid/WelcomeActivity.java

@@ -45,7 +45,7 @@ public class WelcomeActivity extends AppCompatActivity {
         }
 
         prefManager.setFirstTimeLaunch(false);
-        setContentView(R.layout.WelcomeActivity);
+        setContentView(R.layout.welcome_activity);
 
         setFullScreen();