Correct colored status bar implementation for Lollipop, updated status bar colors in some activities to be darker than toolbar color (e.g. tag editor), added elevation to some views, etc. Getting KitKat support again for this colored UI will also come back soon with SystemBarTInt.

app/src/main/java/com/kabouzeid/gramophone/views/ScrimInsetsFrameLayout.java

@@ -0,0 +1,126 @@
+package com.kabouzeid.gramophone.views;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.Canvas;
+import android.graphics.Rect;
+import android.graphics.drawable.Drawable;
+import android.support.v4.view.ViewCompat;
+import android.util.AttributeSet;
+import android.widget.FrameLayout;
+
+import com.kabouzeid.gramophone.R;
+
+/**
+ * A layout that draws something in the insets passed to {@link #fitSystemWindows(Rect)}, i.e. the area above UI chrome
+ * (status and navigation bars, overlay action bars).
+ */
+public class ScrimInsetsFrameLayout extends FrameLayout {
+    private Drawable mInsetForeground;
+
+    private Rect mInsets;
+    private Rect mTempRect = new Rect();
+    private OnInsetsCallback mOnInsetsCallback;
+
+    public ScrimInsetsFrameLayout(Context context) {
+        super(context);
+        init(context, null, 0);
+    }
+
+    public ScrimInsetsFrameLayout(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        init(context, attrs, 0);
+    }
+
+    public ScrimInsetsFrameLayout(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        init(context, attrs, defStyle);
+    }
+
+    private void init(Context context, AttributeSet attrs, int defStyle) {
+        final TypedArray a = context.obtainStyledAttributes(attrs,
+                R.styleable.ScrimInsetsView, defStyle, 0);
+        if (a == null) {
+            return;
+        }
+        mInsetForeground = a.getDrawable(R.styleable.ScrimInsetsView_insetForeground);
+        a.recycle();
+
+        setWillNotDraw(true);
+    }
+
+    @Override
+    protected boolean fitSystemWindows(Rect insets) {
+        mInsets = new Rect(insets);
+        setWillNotDraw(mInsetForeground == null);
+        ViewCompat.postInvalidateOnAnimation(this);
+        if (mOnInsetsCallback != null) {
+            mOnInsetsCallback.onInsetsChanged(insets);
+        }
+        return true; // consume insets
+    }
+
+    @Override
+    public void draw(Canvas canvas) {
+        super.draw(canvas);
+
+        int width = getWidth();
+        int height = getHeight();
+        if (mInsets != null && mInsetForeground != null) {
+            int sc = canvas.save();
+            canvas.translate(getScrollX(), getScrollY());
+
+            // Top
+            mTempRect.set(0, 0, width, mInsets.top);
+            mInsetForeground.setBounds(mTempRect);
+            mInsetForeground.draw(canvas);
+
+            // Bottom
+            mTempRect.set(0, height - mInsets.bottom, width, height);
+            mInsetForeground.setBounds(mTempRect);
+            mInsetForeground.draw(canvas);
+
+            // Left
+            mTempRect.set(0, mInsets.top, mInsets.left, height - mInsets.bottom);
+            mInsetForeground.setBounds(mTempRect);
+            mInsetForeground.draw(canvas);
+
+            // Right
+            mTempRect.set(width - mInsets.right, mInsets.top, width, height - mInsets.bottom);
+            mInsetForeground.setBounds(mTempRect);
+            mInsetForeground.draw(canvas);
+
+            canvas.restoreToCount(sc);
+        }
+    }
+
+    @Override
+    protected void onAttachedToWindow() {
+        super.onAttachedToWindow();
+        if (mInsetForeground != null) {
+            mInsetForeground.setCallback(this);
+        }
+    }
+
+    @Override
+    protected void onDetachedFromWindow() {
+        super.onDetachedFromWindow();
+        if (mInsetForeground != null) {
+            mInsetForeground.setCallback(null);
+        }
+    }
+
+    /**
+     * Allows the calling container to specify a callback for custom processing when insets change (i.e. when
+     * {@link #fitSystemWindows(Rect)} is called. This is useful for setting padding on UI elements based on
+     * UI chrome insets (e.g. a Google Map or a ListView). When using with ListView or GridView, remember to set
+     * clipToPadding to false.
+     */
+    public void setOnInsetsCallback(OnInsetsCallback onInsetsCallback) {
+        mOnInsetsCallback = onInsetsCallback;
+    }
+
+    public static interface OnInsetsCallback {
+        public void onInsetsChanged(Rect insets);
+    }
+}