Using support lib implementation for launcher preference

Bug: 117519297
Change-Id: Icea5e022a337436e48db9376fd441f805dc34e54

3 files changed, 515 insertions, 0 deletions

diff --git a/src/com/android/launcher3/settings/IconBadgingPreference.java b/src/com/android/launcher3/settings/IconBadgingPreference.java
new file mode 100644
index 000000000..7c97b38d2
--- /dev/null
+++ b/src/com/android/launcher3/settings/IconBadgingPreference.java
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2017 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.launcher3.settings;
+
+import static com.android.launcher3.settings.SettingsActivity.EXTRA_FRAGMENT_ARG_KEY;
+import static com.android.launcher3.settings.SettingsActivity.EXTRA_SHOW_FRAGMENT_ARGS;
+
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.app.DialogFragment;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.os.Bundle;
+import android.provider.Settings;
+import android.util.AttributeSet;
+import android.view.View;
+
+import com.android.launcher3.R;
+import com.android.launcher3.notification.NotificationListener;
+import com.android.launcher3.util.SecureSettingsObserver;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceViewHolder;
+
+/**
+ * A {@link Preference} for indicating icon badging status.
+ * Also has utility methods for updating UI based on badging status changes.
+ */
+public class IconBadgingPreference extends Preference
+        implements SecureSettingsObserver.OnChangeListener {
+
+    private boolean mWidgetFrameVisible = false;
+
+    /** Hidden field Settings.Secure.ENABLED_NOTIFICATION_LISTENERS */
+    private static final String NOTIFICATION_ENABLED_LISTENERS = "enabled_notification_listeners";
+
+    public IconBadgingPreference(
+            Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+    public IconBadgingPreference(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    public IconBadgingPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public IconBadgingPreference(Context context) {
+        super(context);
+    }
+
+    private void setWidgetFrameVisible(boolean isVisible) {
+        if (mWidgetFrameVisible != isVisible) {
+            mWidgetFrameVisible = isVisible;
+            notifyChanged();
+        }
+    }
+
+    @Override
+    public void onBindViewHolder(PreferenceViewHolder holder) {
+        super.onBindViewHolder(holder);
+
+        View widgetFrame = holder.findViewById(android.R.id.widget_frame);
+        if (widgetFrame != null) {
+            widgetFrame.setVisibility(mWidgetFrameVisible ? View.VISIBLE : View.GONE);
+        }
+    }
+
+    @Override
+    public void onSettingsChanged(boolean enabled) {
+        int summary = enabled ? R.string.icon_badging_desc_on : R.string.icon_badging_desc_off;
+
+        boolean serviceEnabled = true;
+        if (enabled) {
+            // Check if the listener is enabled or not.
+            String enabledListeners = Settings.Secure.getString(
+                    getContext().getContentResolver(), NOTIFICATION_ENABLED_LISTENERS);
+            ComponentName myListener =
+                    new ComponentName(getContext(), NotificationListener.class);
+            serviceEnabled = enabledListeners != null &&
+                    (enabledListeners.contains(myListener.flattenToString()) ||
+                            enabledListeners.contains(myListener.flattenToShortString()));
+            if (!serviceEnabled) {
+                summary = R.string.title_missing_notification_access;
+            }
+        }
+        setWidgetFrameVisible(!serviceEnabled);
+        setFragment(serviceEnabled ? null : NotificationAccessConfirmation.class.getName());
+        setSummary(summary);
+    }
+
+    public static class NotificationAccessConfirmation
+            extends DialogFragment implements DialogInterface.OnClickListener {
+
+        @Override
+        public Dialog onCreateDialog(Bundle savedInstanceState) {
+            final Context context = getActivity();
+            String msg = context.getString(R.string.msg_missing_notification_access,
+                    context.getString(R.string.derived_app_name));
+            return new AlertDialog.Builder(context)
+                    .setTitle(R.string.title_missing_notification_access)
+                    .setMessage(msg)
+                    .setNegativeButton(android.R.string.cancel, null)
+                    .setPositiveButton(R.string.title_change_settings, this)
+                    .create();
+        }
+
+        @Override
+        public void onClick(DialogInterface dialogInterface, int i) {
+            ComponentName cn = new ComponentName(getActivity(), NotificationListener.class);
+            Bundle showFragmentArgs = new Bundle();
+            showFragmentArgs.putString(EXTRA_FRAGMENT_ARG_KEY, cn.flattenToString());
+
+            Intent intent = new Intent(Settings.ACTION_NOTIFICATION_LISTENER_SETTINGS)
+                    .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+                    .putExtra(EXTRA_FRAGMENT_ARG_KEY, cn.flattenToString())
+                    .putExtra(EXTRA_SHOW_FRAGMENT_ARGS, showFragmentArgs);
+            getActivity().startActivity(intent);
+        }
+    }
+}
diff --git a/src/com/android/launcher3/settings/PreferenceHighlighter.java b/src/com/android/launcher3/settings/PreferenceHighlighter.java
new file mode 100644
index 000000000..4ed4cf113
--- /dev/null
+++ b/src/com/android/launcher3/settings/PreferenceHighlighter.java
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2018 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.launcher3.settings;
+
+import static androidx.core.graphics.ColorUtils.setAlphaComponent;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.ObjectAnimator;
+import android.animation.ValueAnimator;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.util.Property;
+import android.view.View;
+
+import com.android.launcher3.util.Themes;
+
+import androidx.recyclerview.widget.RecyclerView;
+import androidx.recyclerview.widget.RecyclerView.ItemDecoration;
+import androidx.recyclerview.widget.RecyclerView.State;
+import androidx.recyclerview.widget.RecyclerView.ViewHolder;
+
+/**
+ * Utility class for highlighting a preference
+ */
+public class PreferenceHighlighter extends ItemDecoration implements Runnable {
+
+    private static final Property<PreferenceHighlighter, Integer> HIGHLIGHT_COLOR =
+            new Property<PreferenceHighlighter, Integer>(Integer.TYPE, "highlightColor") {
+
+                @Override
+                public Integer get(PreferenceHighlighter highlighter) {
+                    return highlighter.mHighlightColor;
+                }
+
+                @Override
+                public void set(PreferenceHighlighter highlighter, Integer value) {
+                    highlighter.mHighlightColor = value;
+                    highlighter.mRv.invalidateItemDecorations();
+                }
+            };
+
+    private static final long HIGHLIGHT_DURATION = 15000L;
+    private static final long HIGHLIGHT_FADE_OUT_DURATION = 500L;
+    private static final long HIGHLIGHT_FADE_IN_DURATION = 200L;
+    private static final int END_COLOR = setAlphaComponent(Color.WHITE, 0);
+
+    private final Paint mPaint = new Paint();
+    private final RecyclerView mRv;
+    private final int mIndex;
+
+    private boolean mHighLightStarted = false;
+    private int mHighlightColor = END_COLOR;
+
+
+    public PreferenceHighlighter(RecyclerView rv, int index) {
+        mRv = rv;
+        mIndex = index;
+    }
+
+    @Override
+    public void run() {
+        mRv.addItemDecoration(this);
+        mRv.smoothScrollToPosition(mIndex);
+    }
+
+    @Override
+    public void onDraw(Canvas c, RecyclerView parent, State state) {
+        ViewHolder holder = parent.findViewHolderForAdapterPosition(mIndex);
+        if (holder == null) {
+            return;
+        }
+        if (!mHighLightStarted && state.getRemainingScrollVertical() != 0) {
+            // Wait until scrolling stopped
+            return;
+        }
+
+        if (!mHighLightStarted) {
+            // Start highlight
+            int colorTo = setAlphaComponent(Themes.getColorAccent(mRv.getContext()), 66);
+            ObjectAnimator anim = ObjectAnimator.ofArgb(this, HIGHLIGHT_COLOR, END_COLOR, colorTo);
+            anim.setDuration(HIGHLIGHT_FADE_IN_DURATION);
+            anim.setRepeatMode(ValueAnimator.REVERSE);
+            anim.setRepeatCount(4);
+            anim.addListener(new AnimatorListenerAdapter() {
+                @Override
+                public void onAnimationEnd(Animator animation) {
+                    removeHighlight();
+                }
+            });
+            anim.start();
+            mHighLightStarted = true;
+        }
+
+        View view = holder.itemView;
+        mPaint.setColor(mHighlightColor);
+        c.drawRect(0, view.getY(), parent.getWidth(), view.getY() + view.getHeight(), mPaint);
+    }
+
+    private void removeHighlight() {
+        ObjectAnimator anim = ObjectAnimator.ofArgb(
+                this, HIGHLIGHT_COLOR, mHighlightColor, END_COLOR);
+        anim.setDuration(HIGHLIGHT_FADE_OUT_DURATION);
+        anim.setStartDelay(HIGHLIGHT_DURATION);
+        anim.addListener(new AnimatorListenerAdapter() {
+            @Override
+            public void onAnimationEnd(Animator animation) {
+                mRv.removeItemDecoration(PreferenceHighlighter.this);
+            }
+        });
+        anim.start();
+    }
+}
diff --git a/src/com/android/launcher3/settings/SettingsActivity.java b/src/com/android/launcher3/settings/SettingsActivity.java
new file mode 100644
index 000000000..66420d079
--- /dev/null
+++ b/src/com/android/launcher3/settings/SettingsActivity.java
@@ -0,0 +1,250 @@
+/*
+ * Copyright (C) 2015 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.launcher3.settings;
+
+import static com.android.launcher3.SessionCommitReceiver.ADD_ICON_PREFERENCE_KEY;
+import static com.android.launcher3.states.RotationHelper.ALLOW_ROTATION_PREFERENCE_KEY;
+import static com.android.launcher3.states.RotationHelper.getAllowRotationDefaultValue;
+import static com.android.launcher3.util.SecureSettingsObserver.newNotificationSettingsObserver;
+
+import android.app.Activity;
+import android.app.DialogFragment;
+import android.app.Fragment;
+import android.content.Intent;
+import android.os.Bundle;
+import android.provider.Settings;
+import android.text.TextUtils;
+import android.util.Log;
+
+import com.android.launcher3.LauncherFiles;
+import com.android.launcher3.R;
+import com.android.launcher3.Utilities;
+import com.android.launcher3.config.FeatureFlags;
+import com.android.launcher3.graphics.IconShapeOverride;
+import com.android.launcher3.util.SecureSettingsObserver;
+
+import androidx.preference.ListPreference;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceFragment;
+import androidx.preference.PreferenceFragment.OnPreferenceStartFragmentCallback;
+import androidx.preference.PreferenceFragment.OnPreferenceStartScreenCallback;
+import androidx.preference.PreferenceGroup.PreferencePositionCallback;
+import androidx.preference.PreferenceScreen;
+import androidx.recyclerview.widget.RecyclerView;
+
+/**
+ * Settings activity for Launcher. Currently implements the following setting: Allow rotation
+ */
+public class SettingsActivity extends Activity
+        implements OnPreferenceStartFragmentCallback, OnPreferenceStartScreenCallback {
+
+    private static final String FLAGS_PREFERENCE_KEY = "flag_toggler";
+
+    private static final String ICON_BADGING_PREFERENCE_KEY = "pref_icon_badging";
+    /** Hidden field Settings.Secure.ENABLED_NOTIFICATION_LISTENERS */
+    private static final String NOTIFICATION_ENABLED_LISTENERS = "enabled_notification_listeners";
+
+    public static final String EXTRA_FRAGMENT_ARG_KEY = ":settings:fragment_args_key";
+    public static final String EXTRA_SHOW_FRAGMENT_ARGS = ":settings:show_fragment_args";
+    private static final int DELAY_HIGHLIGHT_DURATION_MILLIS = 600;
+    public static final String SAVE_HIGHLIGHTED_KEY = "android:preference_highlighted";
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        if (savedInstanceState == null) {
+            Bundle args = new Bundle();
+            String prefKey = getIntent().getStringExtra(EXTRA_FRAGMENT_ARG_KEY);
+            if (!TextUtils.isEmpty(prefKey)) {
+                args.putString(EXTRA_FRAGMENT_ARG_KEY, prefKey);
+            }
+
+            Fragment f = Fragment.instantiate(
+                    this, getString(R.string.settings_fragment_name), args);
+            // Display the fragment as the main content.
+            getFragmentManager().beginTransaction()
+                    .replace(android.R.id.content, f)
+                    .commit();
+        }
+    }
+
+    private boolean startFragment(String fragment, Bundle args, String key) {
+        if (Utilities.ATLEAST_P && getFragmentManager().isStateSaved()) {
+            // Sometimes onClick can come after onPause because of being posted on the handler.
+            // Skip starting new fragments in that case.
+            return false;
+        }
+        Fragment f = Fragment.instantiate(this, fragment, args);
+        if (f instanceof DialogFragment) {
+            ((DialogFragment) f).show(getFragmentManager(), key);
+        } else {
+            getFragmentManager()
+                    .beginTransaction()
+                    .replace(android.R.id.content, f)
+                    .addToBackStack(key)
+                    .commit();
+        }
+        return true;
+    }
+
+    @Override
+    public boolean onPreferenceStartFragment(
+            PreferenceFragment preferenceFragment, Preference pref) {
+        return startFragment(pref.getFragment(), pref.getExtras(), pref.getKey());
+    }
+
+    @Override
+    public boolean onPreferenceStartScreen(PreferenceFragment caller, PreferenceScreen pref) {
+        Bundle args = new Bundle();
+        args.putString(PreferenceFragment.ARG_PREFERENCE_ROOT, pref.getKey());
+        return startFragment(getString(R.string.settings_fragment_name), args, pref.getKey());
+    }
+
+    /**
+     * This fragment shows the launcher preferences.
+     */
+    public static class LauncherSettingsFragment extends PreferenceFragment {
+
+        private SecureSettingsObserver mIconBadgingObserver;
+
+        private String mHighLightKey;
+        private boolean mPreferenceHighlighted = false;
+
+        @Override
+        public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
+            final Bundle args = getArguments();
+            mHighLightKey = args == null ? null : args.getString(EXTRA_FRAGMENT_ARG_KEY);
+            if (rootKey == null && !TextUtils.isEmpty(mHighLightKey)) {
+                rootKey = getParentKeyForPref(mHighLightKey);
+            }
+
+            if (savedInstanceState != null) {
+                mPreferenceHighlighted = savedInstanceState.getBoolean(SAVE_HIGHLIGHTED_KEY);
+            }
+
+            getPreferenceManager().setSharedPreferencesName(LauncherFiles.SHARED_PREFERENCES_KEY);
+            setPreferencesFromResource(R.xml.launcher_preferences, rootKey);
+
+            PreferenceScreen screen = getPreferenceScreen();
+            for (int i = screen.getPreferenceCount() - 1; i >= 0; i--) {
+                Preference preference = screen.getPreference(i);
+                if (!initPreference(preference)) {
+                    screen.removePreference(preference);
+                }
+            }
+        }
+
+        @Override
+        public void onSaveInstanceState(Bundle outState) {
+            super.onSaveInstanceState(outState);
+            outState.putBoolean(SAVE_HIGHLIGHTED_KEY, mPreferenceHighlighted);
+        }
+
+        protected String getParentKeyForPref(String key) {
+            return null;
+        }
+
+        /**
+         * Initializes a preference. This is called for every preference. Returning false here
+         * will remove that preference from the list.
+         */
+        protected boolean initPreference(Preference preference) {
+            switch (preference.getKey()) {
+                case ICON_BADGING_PREFERENCE_KEY:
+                    if (!Utilities.ATLEAST_OREO ||
+                            !getResources().getBoolean(R.bool.notification_badging_enabled)) {
+                        return false;
+                    }
+
+                    // Listen to system notification badge settings while this UI is active.
+                    mIconBadgingObserver = newNotificationSettingsObserver(
+                            getActivity(), (IconBadgingPreference) preference);
+                    mIconBadgingObserver.register();
+                    // Also listen if notification permission changes
+                    mIconBadgingObserver.getResolver().registerContentObserver(
+                            Settings.Secure.getUriFor(NOTIFICATION_ENABLED_LISTENERS), false,
+                            mIconBadgingObserver);
+                    mIconBadgingObserver.dispatchOnChange();
+                    return true;
+
+                case ADD_ICON_PREFERENCE_KEY:
+                    return Utilities.ATLEAST_OREO;
+
+                case IconShapeOverride.KEY_PREFERENCE:
+                    if (!IconShapeOverride.isSupported(getActivity())) {
+                        return false;
+                    }
+                    IconShapeOverride.handlePreferenceUi((ListPreference) preference);
+                    return true;
+
+                case ALLOW_ROTATION_PREFERENCE_KEY:
+                    if (getResources().getBoolean(R.bool.allow_rotation)) {
+                        // Launcher supports rotation by default. No need to show this setting.
+                        return false;
+                    }
+                    // Initialize the UI once
+                    preference.setDefaultValue(getAllowRotationDefaultValue());
+                    return true;
+
+                case FLAGS_PREFERENCE_KEY:
+                    // Only show flag toggler UI if this build variant implements that.
+                    return FeatureFlags.showFlagTogglerUi();
+            }
+
+            return true;
+        }
+
+        @Override
+        public void onResume() {
+            super.onResume();
+
+            if (isAdded() && !mPreferenceHighlighted) {
+                PreferenceHighlighter highlighter = createHighlighter();
+                if (highlighter != null) {
+                    getView().postDelayed(highlighter, DELAY_HIGHLIGHT_DURATION_MILLIS);
+                    mPreferenceHighlighted = true;
+                }
+            }
+        }
+
+        private PreferenceHighlighter createHighlighter() {
+            if (TextUtils.isEmpty(mHighLightKey)) {
+                return null;
+            }
+
+            PreferenceScreen screen = getPreferenceScreen();
+            if (screen == null) {
+                return null;
+            }
+
+            RecyclerView list = getListView();
+            PreferencePositionCallback callback = (PreferencePositionCallback) list.getAdapter();
+            int position = callback.getPreferenceAdapterPosition(mHighLightKey);
+            return position >= 0 ? new PreferenceHighlighter(list, position) : null;
+        }
+
+        @Override
+        public void onDestroy() {
+            if (mIconBadgingObserver != null) {
+                mIconBadgingObserver.unregister();
+                mIconBadgingObserver = null;
+            }
+            super.onDestroy();
+        }
+    }
+}