Add Bluetooth Slice

Bluetooth slice is added a special case, due to the migration of
bluetooth to a Switch Bar instead of a preference with a controller.

Change-Id: I8b70bb66c862255a4e8d2426ac09939ba6197624
Merged-In: Icfdcd77601ad1e64e0f6c352a8d691f0181515c8
Fixes: 67997327
Test: robotests

src/com/android/settings/bluetooth/BluetoothSliceBuilder.java

@@ -0,0 +1,142 @@
+/*
+ * 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.settings.bluetooth;
+
+import static android.app.slice.Slice.EXTRA_TOGGLE_STATE;
+
+import android.annotation.ColorInt;
+import android.app.PendingIntent;
+import android.bluetooth.BluetoothAdapter;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.net.Uri;
+import android.provider.SettingsSlicesContract;
+
+import com.android.internal.logging.nano.MetricsProto;
+import com.android.settings.R;
+import com.android.settings.SubSettings;
+import com.android.settings.connecteddevice.BluetoothDashboardFragment;
+import com.android.settings.search.DatabaseIndexingUtils;
+import com.android.settings.slices.SliceBroadcastReceiver;
+import com.android.settingslib.bluetooth.LocalBluetoothAdapter;
+import com.android.settingslib.bluetooth.LocalBluetoothManager;
+
+import androidx.slice.Slice;
+import androidx.slice.builders.ListBuilder;
+import androidx.slice.builders.SliceAction;
+
+import android.support.v4.graphics.drawable.IconCompat;
+
+public class BluetoothSliceBuilder {
+
+    private static final String TAG = "BluetoothSliceBuilder";
+
+    /**
+     * Backing Uri for the Bluetooth Slice.
+     */
+    public static final Uri BLUETOOTH_URI = new Uri.Builder()
+            .scheme(ContentResolver.SCHEME_CONTENT)
+            .authority(SettingsSlicesContract.AUTHORITY)
+            .appendPath(SettingsSlicesContract.PATH_SETTING_ACTION)
+            .appendPath(SettingsSlicesContract.KEY_BLUETOOTH)
+            .build();
+
+    /**
+     * Action notifying a change on the BluetoothSlice.
+     */
+    public static final String ACTION_BLUETOOTH_SLICE_CHANGED =
+            "com.android.settings.bluetooth.action.BLUETOOTH_MODE_CHANGED";
+
+    public static final IntentFilter INTENT_FILTER = new IntentFilter();
+
+    static {
+        INTENT_FILTER.addAction(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED);
+        INTENT_FILTER.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
+    }
+
+    private BluetoothSliceBuilder() {}
+
+    /**
+     * Return a Bluetooth Slice bound to {@link #BLUETOOTH_URI}.
+     * <p>
+     * Note that you should register a listener for {@link #INTENT_FILTER} to get changes for
+     * Bluetooth.
+     */
+    public static Slice getSlice(Context context) {
+        final boolean isBluetoothEnabled = isBluetoothEnabled(context);
+        final CharSequence title = context.getText(R.string.bluetooth_settings);
+        final IconCompat icon = IconCompat.createWithResource(context,
+                R.drawable.ic_settings_bluetooth);
+        @ColorInt final int color = com.android.settings.Utils.getColorAccent(context);
+        final PendingIntent toggleAction = getBroadcastIntent(context);
+        final PendingIntent primaryAction = getPrimaryAction(context);
+        final SliceAction primarySliceAction = new SliceAction(primaryAction, icon, title);
+        final SliceAction toggleSliceAction = new SliceAction(toggleAction, null /* actionTitle */,
+                isBluetoothEnabled);
+
+        return new ListBuilder(context, BLUETOOTH_URI, ListBuilder.INFINITY)
+                .setAccentColor(color)
+                .addRow(b -> b
+                        .setTitle(title)
+                        .addEndItem(toggleSliceAction)
+                        .setPrimaryAction(primarySliceAction))
+                .build();
+    }
+
+    /**
+     * Update the current Bluetooth status to the boolean value keyed by
+     * {@link android.app.slice.Slice#EXTRA_TOGGLE_STATE} on {@param intent}.
+     */
+    public static void handleUriChange(Context context, Intent intent) {
+        final boolean newBluetoothState = intent.getBooleanExtra(EXTRA_TOGGLE_STATE, false);
+        final LocalBluetoothAdapter adapter = LocalBluetoothManager.getInstance(context,
+                null /* callback */).getBluetoothAdapter();
+
+        adapter.setBluetoothEnabled(newBluetoothState);
+        // Do not notifyChange on Uri. The service takes longer to update the current value than it
+        // does for the Slice to check the current value again. Let {@link SliceBroadcastRelay}
+        // handle it.
+    }
+
+    private static boolean isBluetoothEnabled(Context context) {
+        final LocalBluetoothAdapter adapter = LocalBluetoothManager.getInstance(context,
+                null /* callback */).getBluetoothAdapter();
+        return adapter.isEnabled();
+    }
+
+    private static PendingIntent getPrimaryAction(Context context) {
+        final String screenTitle = context.getText(R.string.bluetooth_settings_title).toString();
+        final Uri contentUri = new Uri.Builder().appendPath(
+                SettingsSlicesContract.KEY_BLUETOOTH).build();
+        final Intent intent = DatabaseIndexingUtils.buildSearchResultPageIntent(context,
+                BluetoothDashboardFragment.class.getName(), null /* key */, screenTitle,
+                MetricsProto.MetricsEvent.SETTINGS_CONNECTED_DEVICE_CATEGORY)
+                .setClassName(context.getPackageName(), SubSettings.class.getName())
+                .setData(contentUri);
+
+        return PendingIntent.getActivity(context, 0 /* requestCode */,
+                intent, 0 /* flags */);
+    }
+
+    private static PendingIntent getBroadcastIntent(Context context) {
+        final Intent intent = new Intent(ACTION_BLUETOOTH_SLICE_CHANGED)
+                .setClass(context, SliceBroadcastReceiver.class);
+        return PendingIntent.getBroadcast(context, 0 /* requestCode */, intent,
+                PendingIntent.FLAG_CANCEL_CURRENT);
+    }
+}