Merge "[RRS] Avoid the resolution switch too rapidly." into tm-d1-dev (d5279cea) · Commits · e / os / android_packages_apps_Settings

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

+71 −22

Original line number	Diff line number	Diff line
		@@ -46,6 +46,7 @@ import java.util.ArrayList;
		import java.util.HashSet;
		import java.util.List;
		import java.util.Set;
		import java.util.concurrent.atomic.AtomicInteger;

		/** Preference fragment used for switch screen resolution */
		@SearchIndexable
		@@ -61,7 +62,7 @@ public class ScreenResolutionFragment extends RadioButtonPickerFragment {
		private String[] mScreenResolutionSummaries;

		private IllustrationPreference mImagePreference;
		private DensityRestorer mDensityRestorer;
		private DisplayObserver mDisplayObserver;

		@Override
		public void onAttach(Context context) {
		@@ -76,7 +77,7 @@ public class ScreenResolutionFragment extends RadioButtonPickerFragment {
		mResources.getStringArray(R.array.config_screen_resolution_summaries_strings);
		mResolutions = getAllSupportedResolution();
		mImagePreference = new IllustrationPreference(context);
		mDensityRestorer = new DensityRestorer(context);
		mDisplayObserver = new DisplayObserver(context);
		}

		@Override
		@@ -155,11 +156,7 @@ public class ScreenResolutionFragment extends RadioButtonPickerFragment {
		/** Using display manager to set the display mode. */
		@VisibleForTesting
		public void setDisplayMode(final int width) {
		if (width == getDisplayMode().getPhysicalWidth()) {
		return;
		}

		mDensityRestorer.startObserve();
		mDisplayObserver.startObserve();
		mDefaultDisplay.setUserPreferredDisplayMode(getPreferMode(width));
		}

		@@ -171,6 +168,13 @@ public class ScreenResolutionFragment extends RadioButtonPickerFragment {
		: width == QHD_WIDTH ? mScreenResolutionOptions[QHD_INDEX] : null;
		}

		/** Get the width corresponding to the resolution key. */
		int getWidthForResoluitonKey(String key) {
		return mScreenResolutionOptions[FHD_INDEX].equals(key)
		? FHD_WIDTH
		: mScreenResolutionOptions[QHD_INDEX].equals(key) ? QHD_WIDTH : -1;
		}

		@Override
		protected String getDefaultKey() {
		int physicalWidth = getDisplayMode().getPhysicalWidth();
		@@ -180,17 +184,28 @@ public class ScreenResolutionFragment extends RadioButtonPickerFragment {

		@Override
		protected boolean setDefaultKey(final String key) {
		if (mScreenResolutionOptions[FHD_INDEX].equals(key)) {
		setDisplayMode(FHD_WIDTH);

		} else if (mScreenResolutionOptions[QHD_INDEX].equals(key)) {
		setDisplayMode(QHD_WIDTH);
		int width = getWidthForResoluitonKey(key);
		if (width < 0) {
		return false;
		}

		setDisplayMode(width);
		updateIllustrationImage(mImagePreference);

		return true;
		}

		@Override
		public void onRadioButtonClicked(SelectorWithWidgetPreference selected) {
		String selectedKey = selected.getKey();
		int selectedWidth = getWidthForResoluitonKey(selectedKey);
		if (!mDisplayObserver.setPendingResolutionChange(selectedWidth)) {
		return;
		}

		super.onRadioButtonClicked(selected);
		}

		/** Update the resolution image according display mode. */
		private void updateIllustrationImage(IllustrationPreference preference) {
		String key = getDefaultKey();
		@@ -252,12 +267,13 @@ public class ScreenResolutionFragment extends RadioButtonPickerFragment {
		}
		};

		private static final class DensityRestorer implements DisplayManager.DisplayListener {
		private static final class DisplayObserver implements DisplayManager.DisplayListener {
		private final @Nullable Context mContext;
		private int mDefaultDensity;
		private int mCurrentIndex;
		private AtomicInteger mPreviousWidth = new AtomicInteger(-1);

		DensityRestorer(Context context) {
		DisplayObserver(Context context) {
		mContext = context;
		}

		@@ -301,26 +317,59 @@ public class ScreenResolutionFragment extends RadioButtonPickerFragment {
		return;
		}

		if (!isDensityChanged() \|\| !isResolutionChangeApplied()) {
		return;
		}

		restoreDensity();
		stopObserve();
		}

		private void restoreDensity() {
		if (mContext == null) {
		return;
		final DisplayDensityUtils density = new DisplayDensityUtils(mContext);
		if (density.getValues()[mCurrentIndex] != density.getDefaultDensity()) {
		DisplayDensityUtils.setForcedDisplayDensity(
		Display.DEFAULT_DISPLAY, density.getValues()[mCurrentIndex]);
		}

		mDefaultDensity = density.getDefaultDensity();
		}

		private boolean isDensityChanged() {
		final DisplayDensityUtils density = new DisplayDensityUtils(mContext);
		if (density.getDefaultDensity() == mDefaultDensity) {
		return;
		return false;
		}

		if (density.getValues()[mCurrentIndex] != density.getDefaultDensity()) {
		DisplayDensityUtils.setForcedDisplayDensity(
		Display.DEFAULT_DISPLAY, density.getValues()[mCurrentIndex]);
		return true;
		}

		mDefaultDensity = density.getDefaultDensity();
		stopObserve();
		private int getCurrentWidth() {
		final DisplayManager dm = mContext.getSystemService(DisplayManager.class);
		return dm.getDisplay(Display.DEFAULT_DISPLAY).getMode().getPhysicalWidth();
		}

		private boolean setPendingResolutionChange(int selectedWidth) {
		int currentWidth = getCurrentWidth();

		if (selectedWidth == currentWidth) {
		return false;
		}
		if (mPreviousWidth.get() != -1 && !isResolutionChangeApplied()) {
		return false;
		}

		mPreviousWidth.set(currentWidth);

		return true;
		}

		private boolean isResolutionChangeApplied() {
		if (mPreviousWidth.get() == getCurrentWidth()) {
		return false;
		}

		return true;
		}
		}
		}