1 files changed, 113 insertions, 0 deletions
diff --git a/setupwizardlib/src/main/java/com/android/setupwizardlib/view/StatusBarBackgroundLayout.java b/setupwizardlib/src/main/java/com/android/setupwizardlib/view/StatusBarBackgroundLayout.java
new file mode 100644
index 0000000..fe0bc8f
--- /dev/null
+++ b/setupwizardlib/src/main/java/com/android/setupwizardlib/view/StatusBarBackgroundLayout.java
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.setupwizardlib.view;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.Canvas;
+import android.graphics.drawable.Drawable;
+import android.os.Build;
+import android.os.Build.VERSION_CODES;
+import android.util.AttributeSet;
+import android.view.WindowInsets;
+import android.widget.FrameLayout;
+
+import com.android.setupwizardlib.R;
+
+/**
+ * A FrameLayout subclass that will responds to onApplyWindowInsets to draw a drawable in the top
+ * inset area, making a background effect for the navigation bar. To make use of this layout,
+ * specify the system UI visibility {@link android.view.View#SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} and
+ * set specify fitsSystemWindows.
+ *
+ * <p>This view is a normal FrameLayout if either of those are not set, or if the platform version
+ * is lower than Lollipop.
+ */
+public class StatusBarBackgroundLayout extends FrameLayout {
+
+    private Drawable mStatusBarBackground;
+    private Object mLastInsets;  // Use generic Object type for compatibility
+
+    public StatusBarBackgroundLayout(Context context) {
+        super(context);
+        init(context, null, 0);
+    }
+
+    public StatusBarBackgroundLayout(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        init(context, attrs, 0);
+    }
+
+    @TargetApi(VERSION_CODES.HONEYCOMB)
+    public StatusBarBackgroundLayout(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        init(context, attrs, defStyleAttr);
+    }
+
+    private void init(Context context, AttributeSet attrs, int defStyleAttr) {
+        final TypedArray a = context.obtainStyledAttributes(attrs,
+                R.styleable.SuwStatusBarBackgroundLayout, defStyleAttr, 0);
+        final Drawable statusBarBackground =
+                a.getDrawable(R.styleable.SuwStatusBarBackgroundLayout_suwStatusBarBackground);
+        setStatusBarBackground(statusBarBackground);
+        a.recycle();
+    }
+
+    @Override
+    protected void onAttachedToWindow() {
+        super.onAttachedToWindow();
+        if (Build.VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) {
+            if (mLastInsets == null) {
+                requestApplyInsets();
+            }
+        }
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        super.onDraw(canvas);
+        if (Build.VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) {
+            if (mLastInsets != null) {
+                final int insetTop = ((WindowInsets) mLastInsets).getSystemWindowInsetTop();
+                if (insetTop > 0) {
+                    mStatusBarBackground.setBounds(0, 0, getWidth(), insetTop);
+                    mStatusBarBackground.draw(canvas);
+                }
+            }
+        }
+    }
+
+    public void setStatusBarBackground(Drawable background) {
+        mStatusBarBackground = background;
+        if (Build.VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) {
+            setWillNotDraw(background == null);
+            setFitsSystemWindows(background != null);
+            invalidate();
+        }
+    }
+
+    public Drawable getStatusBarBackground() {
+        return mStatusBarBackground;
+    }
+
+    @Override
+    public WindowInsets onApplyWindowInsets(WindowInsets insets) {
+        mLastInsets = insets;
+        return super.onApplyWindowInsets(insets);
+    }
+}