status & navigation bar dim on drawer slide, AboutPage improvement

Author: Yanndroid

README.md

@@ -449,14 +449,9 @@ A layout that looks like and has the same functions as the about screen in any S
 
 </de.dlyt.yanndroid.samsung.layout.AboutPage>
 ```
-The app name and version are automatically added to the view. The info icon at the top right will redirect the user to the app info in settings. The ```app:optional_text="..."``` is the text between the version and the status text. The status text will change according to the state you set the view (see below). You can use ```style="@style/ButtonStyle.AboutPage"``` for the buttons, which are shown at the bottom.  
-:warning: For the back button (top left) to work you need to call this methode in your activity ```aboutPage.initAboutPage(this);```
+The app name and version are automatically added to the view. The info icon at the top right will redirect the user to the app info in settings. The ```app:optional_text="..."``` is the text between the version and the status text. The status text will change according to the state you set the view (see below). You can use ```style="@style/ButtonStyle.AboutPage"``` for the buttons, which are shown at the bottom.
 
 #### Methods
-Essential for the back button to work.
-```java
-public void initAboutPage(Activity activity)
-```
 Set the update state of the view to either ```AboutPage.LOADING```, ```AboutPage.NO_UPDATE``` or ```AboutPage.UPDATE_AVAILABLE```. This will change the visibility of certain views and the text of the Status.
 ```java
 public void setUpdateState(@UpdateState int state)
@@ -832,6 +827,7 @@ My sample app icon for example:
 - fixed landscape toolbar height
 - improved orientation switching
 - button text fix
+- status & navigation bar dim on drawer slide
 - added changelog to readme
 
 </details>

app/src/main/java/de/dlyt/yanndroid/samsungexample/AboutActivity.java

@@ -20,13 +20,11 @@ protected void onCreate(Bundle savedInstanceState) {
         setContentView(R.layout.activity_about);
 
         AboutPage about_page = findViewById(R.id.about_page);
-        about_page.initAboutPage(this);
 
         ((MaterialButton) findViewById(R.id.about_btn1)).setOnClickListener(v -> about_page.setUpdateState(AboutPage.LOADING));
         ((MaterialButton) findViewById(R.id.about_btn2)).setOnClickListener(v -> about_page.setUpdateState(AboutPage.NO_UPDATE));
         ((MaterialButton) findViewById(R.id.about_btn3)).setOnClickListener(v -> about_page.setUpdateState(AboutPage.UPDATE_AVAILABLE));
 
-
         if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
             getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
         } else {

yanndroid/samsung/src/main/java/de/dlyt/yanndroid/samsung/layout/AboutPage.java

@@ -3,6 +3,7 @@
 import android.app.Activity;
 import android.content.ActivityNotFoundException;
 import android.content.Context;
+import android.content.ContextWrapper;
 import android.content.Intent;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
@@ -84,11 +85,18 @@ public AboutPage(Context context, @Nullable AttributeSet attrs) {
         } catch (PackageManager.NameNotFoundException e) {
             e.printStackTrace();
         }
-
+        toolbarLayout.setNavigationOnClickListener(v -> getActivity().onBackPressed());
     }
 
-    public void initAboutPage(Activity activity) {
-        toolbarLayout.setNavigationOnClickListener(v -> activity.onBackPressed());
+    private Activity getActivity() {
+        Context context = getContext();
+        while (context instanceof ContextWrapper) {
+            if (context instanceof Activity) {
+                return (Activity) context;
+            }
+            context = ((ContextWrapper) context).getBaseContext();
+        }
+        return null;
     }
 
     public void setUpdateButtonOnClickListener(OnClickListener listener) {

yanndroid/samsung/src/main/java/de/dlyt/yanndroid/samsung/layout/DrawerLayout.java

@@ -5,11 +5,13 @@
 import android.content.ContextWrapper;
 import android.content.res.Configuration;
 import android.content.res.TypedArray;
+import android.graphics.Color;
 import android.graphics.drawable.Drawable;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.view.Window;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.TextView;
@@ -83,6 +85,7 @@ public DrawerLayout(Context context, @Nullable AttributeSet attrs) {
         init();
 
         Boolean isRtl = getResources().getConfiguration().getLayoutDirection() == View.LAYOUT_DIRECTION_RTL;
+        Window window = getActivity().getWindow();
 
         ActionBarDrawerToggle actionBarDrawerToggle = new ActionBarDrawerToggle(getActivity(), drawerLayout, R.string.opened, R.string.closed) {
             @Override
@@ -91,17 +94,17 @@ public void onDrawerSlide(View drawerView, float slideOffset) {
                 float slideX = drawerView.getWidth() * slideOffset;
                 if (isRtl) slideX *= -1;
                 content.setTranslationX(slideX);
+
+                float[] hsv = new float[3];
+                Color.colorToHSV(ContextCompat.getColor(getContext(), R.color.background_color), hsv);
+                hsv[2] *= 1f - (slideOffset * 0.2f);
+                window.setStatusBarColor(Color.HSVToColor(hsv));
+                window.setNavigationBarColor(Color.HSVToColor(hsv));
+                
             }
         };
         drawerLayout.addDrawerListener(actionBarDrawerToggle);
-
-        toolbarLayout.setNavigationOnClickListener(new OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                drawerLayout.openDrawer(drawer, true);
-            }
-        });
-
+        toolbarLayout.setNavigationOnClickListener(v -> drawerLayout.openDrawer(drawer, true));
     }
 
     private void init() {