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Commit 7849360e authored by Zemiao Zhu's avatar Zemiao Zhu
Browse files

Change toolbar color dynamically based on scroll offset for S. 

Bug: 192600648
Test: manual
Change-Id: Ia4c80856c0e345be3f7614cfe6923daf8eb56db1
parent f6650b10

res/values-v31/dimens.xml

0 → 100644
+19 −0
Original line number Diff line number Diff line 
<!--

  ~ Copyright (C) 2021 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.

  -->

<resources>

    <dimen name="action_bar_elevation">0dp</dimen>

    <dimen name="action_bar_margin">0dp</dimen>

</resources>

res/values/colors.xml

+1 −0
Original line number Diff line number Diff line
@@ -52,4 +52,5 @@ 


    <color name="list_divider_color">#1f000000</color>

    <color name="list_item_selected_background_color">?android:colorSecondary</color>

    <color name="color_surface_header">@color/app_background_color</color>

</resources>

res/values/overlayable.xml

+1 −0
Original line number Diff line number Diff line
@@ -41,6 +41,7 @@ 
            <!-- START COLOR -->

            <item type="color" name="primary"/>

            <item type="color" name="list_item_selected_background_color"/>

            <item type="color" name="color_surface_header"/>

            <!-- END COLOR -->



            <!-- START DIMEN -->

src/com/android/documentsui/BaseActivity.java

+5 −0
Original line number Diff line number Diff line
@@ -167,6 +167,11 @@ public abstract class BaseActivity 


        mNavigator = new NavigationViewManager(this, mDrawer, mState, this, breadcrumb,

                profileTabsContainer, DocumentsApplication.getUserIdManager(this));

        AppBarLayout appBarLayout = findViewById(R.id.app_bar);

        if (appBarLayout != null) {

            appBarLayout.addOnOffsetChangedListener(mNavigator);

        }



        SearchManagerListener searchListener = new SearchManagerListener() {

            /**

             * Called when search results changed. Refreshes the content of the directory. It

src/com/android/documentsui/NavigationViewManager.java

+50 −1
Original line number Diff line number Diff line
@@ -19,20 +19,27 @@ package com.android.documentsui; 
import static com.android.documentsui.base.SharedMinimal.VERBOSE;



import android.content.res.Resources;

import android.content.res.TypedArray;

import android.graphics.Outline;

import android.graphics.drawable.ColorDrawable;

import android.graphics.drawable.Drawable;

import android.util.Log;

import android.view.View;

import android.view.ViewOutlineProvider;

import android.view.Window;

import android.view.WindowManager;

import android.widget.FrameLayout;



import androidx.annotation.ColorRes;

import androidx.annotation.Nullable;

import androidx.appcompat.widget.Toolbar;

import androidx.core.content.ContextCompat;



import com.android.documentsui.base.RootInfo;

import com.android.documentsui.base.State;

import com.android.documentsui.base.UserId;

import com.android.documentsui.dirlist.AnimationView;

import com.android.documentsui.util.VersionUtils;



import com.google.android.material.appbar.AppBarLayout;

import com.google.android.material.appbar.CollapsingToolbarLayout;
@@ -42,12 +49,13 @@ import java.util.function.IntConsumer; 
/**

 * A facade over the portions of the app and drawer toolbars.

 */

public class NavigationViewManager {

public class NavigationViewManager implements AppBarLayout.OnOffsetChangedListener {



    private static final String TAG = "NavigationViewManager";



    private final DrawerController mDrawer;

    private final Toolbar mToolbar;

    private final BaseActivity mActivity;

    private final View mHeader;

    private final State mState;

    private final NavigationViewManager.Environment mEnv;
@@ -61,6 +69,7 @@ public class NavigationViewManager { 
    private final boolean mShowSearchBar;



    private boolean mIsActionModeActivated = false;

    private @ColorRes int mDefaultStatusBarColorResId;



    public NavigationViewManager(

            BaseActivity activity,
@@ -71,6 +80,7 @@ public class NavigationViewManager { 
            View tabLayoutContainer,

            UserIdManager userIdManager) {



        mActivity = activity;

        mToolbar = activity.findViewById(R.id.toolbar);

        mHeader = activity.findViewById(R.id.directory_header);

        mDrawer = drawer;
@@ -93,6 +103,15 @@ public class NavigationViewManager { 
        mDefaultOutlineProvider = mToolbar.getOutlineProvider();

        mShowSearchBar = activity.getResources().getBoolean(R.bool.show_search_bar);



        final int[] styledAttrs = {android.R.attr.statusBarColor};

        TypedArray a = mActivity.obtainStyledAttributes(styledAttrs);

        mDefaultStatusBarColorResId = a.getResourceId(0, -1);

        if (mDefaultStatusBarColorResId == -1) {

            Log.w(TAG, "Retrieve statusBarColorResId from theme failed, assigned default");

            mDefaultStatusBarColorResId = R.color.app_background_color;

        }

        a.recycle();



        final Resources resources = mToolbar.getResources();

        final int radius = resources.getDimensionPixelSize(R.dimen.search_bar_radius);

        final int marginStart =
@@ -108,6 +127,36 @@ public class NavigationViewManager { 
        };

    }



    @Override

    public void onOffsetChanged(AppBarLayout appBarLayout, int offset) {

        if (!VersionUtils.isAtLeastS()) {

            return;

        }



        // For S+ Only. Change toolbar color dynamically based on scroll offset.

        // Usually this can be done in xml using app:contentScrim and app:statusBarScrim, however

        // in our case since we also put directory_header.xml inside the CollapsingToolbarLayout,

        // the scrim will also cover the directory header. Long term need to think about how to

        // move directory_header out of the AppBarLayout.



        Window window = mActivity.getWindow();

        View actionBar = window.getDecorView().findViewById(R.id.action_mode_bar);

        int dynamicHeaderColor = ContextCompat.getColor(mActivity,

                offset == 0 ? mDefaultStatusBarColorResId : R.color.color_surface_header);

        if (actionBar != null) {

            // Action bar needs to be updated separately for selection mode.

            actionBar.setBackgroundColor(dynamicHeaderColor);

        }



        window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);

        window.setStatusBarColor(dynamicHeaderColor);

        if (shouldShowSearchBar()) {

            // Do not change search bar background.

        } else {

            mToolbar.setBackground(new ColorDrawable(dynamicHeaderColor));

        }

    }



    public void setSearchBarClickListener(View.OnClickListener listener) {

        mSearchBarView.setOnClickListener(listener);

    }