| /* |
| * Copyright (C) 2012 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.internal.view; |
| |
| import android.compat.annotation.UnsupportedAppUsage; |
| import android.content.Context; |
| import android.content.res.Configuration; |
| import android.content.res.Resources; |
| import android.content.res.TypedArray; |
| import android.os.Build; |
| |
| import com.android.internal.R; |
| |
| /** |
| * Allows components to query for various configuration policy decisions |
| * about how the action bar should lay out and behave on the current device. |
| */ |
| public class ActionBarPolicy { |
| @UnsupportedAppUsage |
| private Context mContext; |
| |
| @UnsupportedAppUsage |
| public static ActionBarPolicy get(Context context) { |
| return new ActionBarPolicy(context); |
| } |
| |
| @UnsupportedAppUsage |
| private ActionBarPolicy(Context context) { |
| mContext = context; |
| } |
| |
| /** |
| * Returns the maximum number of action buttons that should be permitted within an action |
| * bar/action mode. This will be used to determine how many showAsAction="ifRoom" items can fit. |
| * "always" items can override this. |
| */ |
| @UnsupportedAppUsage |
| public int getMaxActionButtons() { |
| final Configuration config = mContext.getResources().getConfiguration(); |
| final int width = config.screenWidthDp; |
| final int height = config.screenHeightDp; |
| final int smallest = config.smallestScreenWidthDp; |
| if (smallest > 600 || (width > 960 && height > 720) || (width > 720 && height > 960)) { |
| // For values-w600dp, values-sw600dp and values-xlarge. |
| return 5; |
| } else if (width >= 500 || (width > 640 && height > 480) || (width > 480 && height > 640)) { |
| // For values-w500dp and values-large. |
| return 4; |
| } else if (width >= 360) { |
| // For values-w360dp. |
| return 3; |
| } else { |
| return 2; |
| } |
| } |
| @UnsupportedAppUsage |
| public boolean showsOverflowMenuButton() { |
| return true; |
| } |
| |
| @UnsupportedAppUsage |
| public int getEmbeddedMenuWidthLimit() { |
| return mContext.getResources().getDisplayMetrics().widthPixels / 2; |
| } |
| |
| @UnsupportedAppUsage |
| public boolean hasEmbeddedTabs() { |
| final int targetSdk = mContext.getApplicationInfo().targetSdkVersion; |
| if (targetSdk >= Build.VERSION_CODES.JELLY_BEAN) { |
| return mContext.getResources().getBoolean(R.bool.action_bar_embed_tabs); |
| } |
| |
| // The embedded tabs policy changed in Jellybean; give older apps the old policy |
| // so they get what they expect. |
| final Configuration configuration = mContext.getResources().getConfiguration(); |
| final int width = configuration.screenWidthDp; |
| final int height = configuration.screenHeightDp; |
| return configuration.orientation == Configuration.ORIENTATION_LANDSCAPE || |
| width >= 480 || (width >= 640 && height >= 480); |
| } |
| |
| @UnsupportedAppUsage |
| public int getTabContainerHeight() { |
| TypedArray a = mContext.obtainStyledAttributes(null, R.styleable.ActionBar, |
| com.android.internal.R.attr.actionBarStyle, 0); |
| int height = a.getLayoutDimension(R.styleable.ActionBar_height, 0); |
| Resources r = mContext.getResources(); |
| if (!hasEmbeddedTabs()) { |
| // Stacked tabs; limit the height |
| height = Math.min(height, |
| r.getDimensionPixelSize(R.dimen.action_bar_stacked_max_height)); |
| } |
| a.recycle(); |
| return height; |
| } |
| |
| public boolean enableHomeButtonByDefault() { |
| // Older apps get the home button interaction enabled by default. |
| // Newer apps need to enable it explicitly. |
| return mContext.getApplicationInfo().targetSdkVersion < |
| Build.VERSION_CODES.ICE_CREAM_SANDWICH; |
| } |
| |
| @UnsupportedAppUsage |
| public int getStackedTabMaxWidth() { |
| return mContext.getResources().getDimensionPixelSize( |
| R.dimen.action_bar_stacked_tab_max_width); |
| } |
| } |