8d5326358e
Bug: 25973134 Change-Id: Icaddf416e386624e9d8d4b06072a650e266ee9d6
114 lines
3.9 KiB
Java
114 lines
3.9 KiB
Java
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.setupwizardlib.view;
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import android.annotation.TargetApi;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.graphics.Canvas;
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import android.graphics.drawable.Drawable;
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import android.os.Build;
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import android.os.Build.VERSION_CODES;
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import android.util.AttributeSet;
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import android.view.WindowInsets;
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import android.widget.FrameLayout;
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import com.android.setupwizardlib.R;
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/**
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* A FrameLayout subclass that will responds to onApplyWindowInsets to draw a drawable in the top
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* inset area, making a background effect for the navigation bar. To make use of this layout,
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* specify the system UI visibility {@link android.view.View#SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} and
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* set specify fitsSystemWindows.
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*
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* <p>This view is a normal FrameLayout if either of those are not set, or if the platform version
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* is lower than Lollipop.
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*/
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public class StatusBarBackgroundLayout extends FrameLayout {
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private Drawable mStatusBarBackground;
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private Object mLastInsets; // Use generic Object type for compatibility
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public StatusBarBackgroundLayout(Context context) {
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super(context);
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init(context, null, 0);
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}
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public StatusBarBackgroundLayout(Context context, AttributeSet attrs) {
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super(context, attrs);
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init(context, attrs, 0);
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}
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@TargetApi(VERSION_CODES.HONEYCOMB)
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public StatusBarBackgroundLayout(Context context, AttributeSet attrs, int defStyleAttr) {
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super(context, attrs, defStyleAttr);
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init(context, attrs, defStyleAttr);
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}
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private void init(Context context, AttributeSet attrs, int defStyleAttr) {
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final TypedArray a = context.obtainStyledAttributes(attrs,
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R.styleable.SuwStatusBarBackgroundLayout, defStyleAttr, 0);
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final Drawable statusBarBackground =
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a.getDrawable(R.styleable.SuwStatusBarBackgroundLayout_suwStatusBarBackground);
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setStatusBarBackground(statusBarBackground);
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a.recycle();
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}
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@Override
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protected void onAttachedToWindow() {
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super.onAttachedToWindow();
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if (Build.VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) {
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if (mLastInsets == null) {
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requestApplyInsets();
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}
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}
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}
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@Override
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protected void onDraw(Canvas canvas) {
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super.onDraw(canvas);
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if (Build.VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) {
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if (mLastInsets != null) {
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final int insetTop = ((WindowInsets) mLastInsets).getSystemWindowInsetTop();
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if (insetTop > 0) {
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mStatusBarBackground.setBounds(0, 0, getWidth(), insetTop);
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mStatusBarBackground.draw(canvas);
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}
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}
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}
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}
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public void setStatusBarBackground(Drawable background) {
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mStatusBarBackground = background;
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if (Build.VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) {
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setWillNotDraw(background == null);
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setFitsSystemWindows(background != null);
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invalidate();
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}
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}
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public Drawable getStatusBarBackground() {
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return mStatusBarBackground;
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}
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@Override
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public WindowInsets onApplyWindowInsets(WindowInsets insets) {
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mLastInsets = insets;
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return super.onApplyWindowInsets(insets);
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}
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}
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