A better way to color status bar and fix screen mess sometimes in Lollipop

app/src/main/java/com/hippo/ehviewer/widget/StatusBarLayout.java

@@ -54,12 +54,15 @@ public class StatusBarLayout extends ViewGroup {
 
     private void init(Context context, AttributeSet attrs) {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
-            setWillNotDraw(false);
             mPaint = new Paint();
             if (attrs != null) {
                 TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.StatusBarLayout);
-                mPaint.setColor(a.getColor(R.styleable.StatusBarLayout_statusBarColor, Color.BLACK));
+                int color = a.getColor(R.styleable.StatusBarLayout_statusBarColor, Color.BLACK);
+                mPaint.setColor(color);
+                setWillNotDraw(Color.alpha(color) == 0);
                 a.recycle();
+            } else {
+                setWillNotDraw(false);
             }
         }
     }
@@ -69,6 +72,7 @@ public class StatusBarLayout extends ViewGroup {
             if (mStatusBarColor != color) {
                 mStatusBarColor = color;
                 mPaint.setColor(color);
+                setWillNotDraw(Color.alpha(color) == 0);
                 invalidate();
             }
         }

app/src/main/res/layout/activity_content.xml

@@ -26,7 +26,7 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:fitsSystemWindows="true"
-        auto:statusBarColor="@color/theme_primary_dark">
+        auto:statusBarColor="@android:color/transparent">
 
         <com.hippo.scene.StageLayout
             android:id="@+id/stage"

app/src/main/res/values-v19/themes.xml

@@ -21,7 +21,7 @@
     </style>
 
     <style name="AppTheme.Content" parent="AppTheme.NoActionBar">
-        <item name="android:windowBackground">@null</item>
+        <item name="android:windowBackground">@color/theme_primary_dark</item>
 
         <item name="android:windowTranslucentStatus">true</item>
         <item name="android:windowTranslucentNavigation">true</item>

app/src/main/res/values-v21/themes.xml

@@ -16,7 +16,7 @@
 <resources>
 
     <style name="AppTheme.Content" parent="AppTheme.NoActionBar">
-        <item name="android:windowBackground">@null</item>
+        <item name="android:windowBackground">@color/theme_primary_dark</item>
 
         <item name="android:windowTranslucentStatus">false</item>
         <item name="android:windowTranslucentNavigation">true</item>