New notification icon and setting for toolbar opaque

app/src/main/java/com/kabouzeid/gramophone/helper/PlayingNotificationHelper.java

@@ -46,7 +46,7 @@ public class PlayingNotificationHelper {
                 R.layout.notification_playing_expanded);
 
         notification = new NotificationCompat.Builder(service)
-                .setSmallIcon(R.drawable.ic_audiotrack_white_24dp)
+                .setSmallIcon(R.drawable.ic_notification)
                 .setContentIntent(getOpenMusicControllerPendingIntent())
                 .setCategory(NotificationCompat.CATEGORY_PROGRESS)
                 .setPriority(NotificationCompat.PRIORITY_MAX)

app/src/main/java/com/kabouzeid/gramophone/ui/activities/MainActivity.java

@@ -9,10 +9,8 @@ import android.support.v4.widget.DrawerLayout;
 import android.support.v7.app.ActionBar;
 import android.support.v7.app.ActionBarDrawerToggle;
 import android.support.v7.widget.Toolbar;
-import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
-import android.view.MotionEvent;
 import android.view.View;
 
 import com.astuetz.PagerSlidingTabStrip;
@@ -24,6 +22,7 @@ import com.kabouzeid.gramophone.helper.MusicPlayerRemote;
 import com.kabouzeid.gramophone.interfaces.KabViewsDisableAble;
 import com.kabouzeid.gramophone.model.MusicRemoteEvent;
 import com.kabouzeid.gramophone.model.Song;
+import com.kabouzeid.gramophone.model.UIPreferenceChangedEvent;
 import com.kabouzeid.gramophone.ui.activities.base.AbsFabActivity;
 import com.kabouzeid.gramophone.ui.fragments.NavigationDrawerFragment;
 import com.kabouzeid.gramophone.ui.fragments.mainactivityfragments.AbsMainActivityFragment;
@@ -116,14 +115,19 @@ public class MainActivity extends AbsFabActivity
         setTitle(getResources().getString(R.string.app_name));
         toolbar = (Toolbar) findViewById(R.id.toolbar);
         statusBar = findViewById(R.id.statusBar);
+        setToolBarTransparent(PreferenceUtils.getInstance(this).transparentToolbar());
         setSupportActionBar(toolbar);
-        float alpha = 0.97f;
-        ViewUtil.setBackgroundAlpha(toolbar, alpha, Util.resolveColor(this, R.attr.colorPrimary));
-        ViewUtil.setBackgroundAlpha(statusBar, alpha, Util.resolveColor(this, R.attr.colorPrimary));
-        ViewUtil.setBackgroundAlpha(slidingTabLayout, alpha, Util.resolveColor(this, R.attr.colorPrimary));
         setUpDrawerToggle();
     }
 
+    private void setToolBarTransparent(boolean transparent){
+        float alpha = transparent ? 0.97f : 1f;
+        final int colorPrimary = Util.resolveColor(this, R.attr.colorPrimary);
+        ViewUtil.setBackgroundAlpha(toolbar, alpha, colorPrimary);
+        ViewUtil.setBackgroundAlpha(statusBar, alpha, colorPrimary);
+        ViewUtil.setBackgroundAlpha(slidingTabLayout, alpha, colorPrimary);
+    }
+
     private void setUpDrawerToggle() {
         drawerToggle = new ActionBarDrawerToggle(
                 this,
@@ -269,6 +273,16 @@ public class MainActivity extends AbsFabActivity
         super.onConfigurationChanged(newConfig);
     }
 
+    @Override
+    public void onUIPreferenceChangedEvent(UIPreferenceChangedEvent event) {
+        super.onUIPreferenceChangedEvent(event);
+        switch (event.getAction()) {
+            case UIPreferenceChangedEvent.TOOLBAR_TRANSPARENT_CHANGED:
+                setToolBarTransparent((boolean) event.getValue());
+                break;
+        }
+    }
+
     @Override
     public void onBackPressed() {
         if (navigationDrawerFragment.isDrawerOpen()) {

app/src/main/java/com/kabouzeid/gramophone/ui/activities/SettingsActivity.java

@@ -54,6 +54,14 @@ public class SettingsActivity extends AbsBaseActivity {
                 }
             });
 
+            findPreference("transparent_toolbar").setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+                @Override
+                public boolean onPreferenceChange(Preference preference, Object o) {
+                    App.bus.post(new UIPreferenceChangedEvent(UIPreferenceChangedEvent.TOOLBAR_TRANSPARENT_CHANGED, o));
+                    return true;
+                }
+            });
+
             findPreference("colored_album_footers").setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
                 @Override
                 public boolean onPreferenceChange(Preference preference, Object o) {

app/src/main/res/values/strings_activity_settings.xml

@@ -32,6 +32,7 @@
         <item>0</item>
         <item>1</item>
     </string-array>
+    <string name="pref_title_transparent_toolbar">Semi-Transparent toolbar</string>
     <string name="pref_title_show_playback_controller_card">Playback controller card</string>
     <string name="pref_title_colored_navigation_bar_artists">Colored navigation bar artist view</string>
     <string name="pref_title_colored_navigation_bar_albums">Colored navigation bar album view</string>

app/src/main/res/xml/pref_ui.xml

@@ -10,6 +10,11 @@
             android:positiveButtonText="@null"
             android:title="@string/pref_title_general_theme"/>
 
+        <CheckBoxPreference
+            android:defaultValue="true"
+            android:key="transparent_toolbar"
+            android:title="@string/pref_title_transparent_toolbar"/>
+
         <CheckBoxPreference
             android:defaultValue="true"
             android:key="playback_controller_card"