Add ScreenResolutionController to Settings app

Settings for resolution switch

Bug: b/199559703
Test: Check resolution switch UI in Settings app
      atest SettingsUnitTests:ScreenResolutionControllerTest
      atest SettingsUnitTests:ScreenResolutionFragmentTest

Change-Id: I46d3be3b82ca512b8672efaa489df2cdaab26d6d
Merged-In: I46d3be3b82ca512b8672efaa489df2cdaab26d6d

src/com/android/settings/display/ScreenResolutionFragment.java

@@ -0,0 +1,217 @@
+/*
+ * Copyright (C) 2022 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.settings.display;
+
+import static com.android.settings.display.ScreenResolutionController.FHD_WIDTH;
+import static com.android.settings.display.ScreenResolutionController.QHD_WIDTH;
+
+import android.app.settings.SettingsEnums;
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Point;
+import android.graphics.drawable.Drawable;
+import android.hardware.display.DisplayManager;
+import android.text.TextUtils;
+import android.view.Display;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.R;
+import com.android.settings.search.BaseSearchIndexProvider;
+import com.android.settings.widget.RadioButtonPickerFragment;
+import com.android.settingslib.search.SearchIndexable;
+import com.android.settingslib.widget.CandidateInfo;
+import com.android.settingslib.widget.IllustrationPreference;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+/** Preference fragment used for switch screen resolution */
+@SearchIndexable
+public class ScreenResolutionFragment extends RadioButtonPickerFragment {
+
+    private static final String TAG = "ScreenResolution";
+
+    private Resources mResources;
+    private static final int FHD_INDEX = 0;
+    private static final int QHD_INDEX = 1;
+    private Display mDefaultDisplay;
+    private String[] mScreenResolutionOptions;
+    private Set<Point> mResolutions;
+
+    private IllustrationPreference mImagePreference;
+
+    @Override
+    public void onAttach(Context context) {
+        super.onAttach(context);
+
+        mDefaultDisplay =
+                context.getSystemService(DisplayManager.class).getDisplay(Display.DEFAULT_DISPLAY);
+        mResources = context.getResources();
+        mScreenResolutionOptions =
+                mResources.getStringArray(R.array.config_screen_resolution_options_strings);
+        mResolutions = getAllSupportedResolution();
+        mImagePreference = new IllustrationPreference(context);
+    }
+
+    @Override
+    protected int getPreferenceScreenResId() {
+        return R.xml.screen_resolution_settings;
+    }
+
+    @Override
+    protected void addStaticPreferences(PreferenceScreen screen) {
+        updateIllustrationImage(mImagePreference);
+        screen.addPreference(mImagePreference);
+    }
+
+    @Override
+    protected List<? extends CandidateInfo> getCandidates() {
+        final List<ScreenResolutionCandidateInfo> candidates = new ArrayList<>();
+
+        for (int i = 0; i < mScreenResolutionOptions.length; i++) {
+            candidates.add(
+                    new ScreenResolutionCandidateInfo(
+                            mScreenResolutionOptions[i],
+                            mScreenResolutionOptions[i],
+                            true /* enabled */));
+        }
+
+        return candidates;
+    }
+
+    /** Get all supported resolutions on the device. */
+    private Set<Point> getAllSupportedResolution() {
+        Set<Point> resolutions = new HashSet<>();
+        for (Display.Mode mode : mDefaultDisplay.getSupportedModes()) {
+            resolutions.add(new Point(mode.getPhysicalWidth(), mode.getPhysicalHeight()));
+        }
+
+        return resolutions;
+    }
+
+    /** Get prefer display mode. */
+    private Display.Mode getPreferMode(int width) {
+        for (Point resolution : mResolutions) {
+            if (resolution.x == width) {
+                return new Display.Mode(
+                        resolution.x, resolution.y, getDisplayMode().getRefreshRate());
+            }
+        }
+
+        return getDisplayMode();
+    }
+
+    /** Get current display mode. */
+    @VisibleForTesting
+    public Display.Mode getDisplayMode() {
+        return mDefaultDisplay.getMode();
+    }
+
+    /** Using display manager to set the display mode. */
+    @VisibleForTesting
+    public void setDisplayMode(int width) {
+        mDefaultDisplay.setUserPreferredDisplayMode(getPreferMode(width));
+    }
+
+    /** Get the key corresponding to the resolution. */
+    @VisibleForTesting
+    String getKeyForResolution(int width) {
+        return width == FHD_WIDTH
+                ? mScreenResolutionOptions[FHD_INDEX]
+                : width == QHD_WIDTH ? mScreenResolutionOptions[QHD_INDEX] : null;
+    }
+
+    @Override
+    protected String getDefaultKey() {
+        int physicalWidth = getDisplayMode().getPhysicalWidth();
+
+        return getKeyForResolution(physicalWidth);
+    }
+
+    @Override
+    protected boolean setDefaultKey(String key) {
+        if (mScreenResolutionOptions[FHD_INDEX].equals(key)) {
+            setDisplayMode(FHD_WIDTH);
+
+        } else if (mScreenResolutionOptions[QHD_INDEX].equals(key)) {
+            setDisplayMode(QHD_WIDTH);
+        }
+
+        updateIllustrationImage(mImagePreference);
+        return true;
+    }
+
+    /** Update the resolution image according display mode. */
+    private void updateIllustrationImage(IllustrationPreference preference) {
+        String key = getDefaultKey();
+
+        if (TextUtils.equals(mScreenResolutionOptions[FHD_INDEX], key)) {
+            preference.setLottieAnimationResId(R.drawable.screen_resolution_1080p);
+        } else if (TextUtils.equals(mScreenResolutionOptions[QHD_INDEX], key)) {
+            preference.setLottieAnimationResId(R.drawable.screen_resolution_1440p);
+        }
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        return SettingsEnums.SCREEN_RESOLUTION;
+    }
+
+    static class ScreenResolutionCandidateInfo extends CandidateInfo {
+        private final CharSequence mLabel;
+        private final String mKey;
+
+        ScreenResolutionCandidateInfo(CharSequence label, String key, boolean enabled) {
+            super(enabled);
+            mLabel = label;
+            mKey = key;
+        }
+
+        @Override
+        public CharSequence loadLabel() {
+            return mLabel;
+        }
+
+        @Override
+        public Drawable loadIcon() {
+            return null;
+        }
+
+        @Override
+        public String getKey() {
+            return mKey;
+        }
+    }
+
+    public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
+            new BaseSearchIndexProvider(R.xml.screen_resolution_settings) {
+
+                boolean mIsFHDSupport = false;
+                boolean mIsQHDSupport = false;
+
+                @Override
+                protected boolean isPageSearchEnabled(Context context) {
+                    ScreenResolutionController mController =
+                            new ScreenResolutionController(context, "fragment");
+                    return mController.checkSupportedResolutions();
+                }
+            };
+}