// Copyright 2016 Google Inc.
// 
// 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.google.android_quick_settings;

import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.content.SharedPreferences;
import android.graphics.drawable.Icon;
import android.os.Build;
import android.service.quicksettings.Tile;
import android.service.quicksettings.TileService;
import android.util.Log;
import android.util.StringBuilderPrinter;

import java.util.Locale;

import static com.google.android_quick_settings.R.drawable.ic_android_black_24dp;

@SuppressLint("Override")
@TargetApi(Build.VERSION_CODES.N)
public class QuickSettingsService
   extends TileService {

    private static final String SERVICE_STATUS_FLAG = "serviceStatus";
    private static final String PREFERENCES_KEY = "com.google.android_quick_settings";

    /**
     * Called when the tile is added to the Quick Settings.
     * @return TileService constant indicating tile state
     */

    @Override
    public int onTileAdded() {
        Log.d("QS", "Tile added");
        return TileService.TILE_MODE_ACTIVE;
    }

    /**
     * Called when this tile begins listening for events.
     */
    @Override
    public void onStartListening() {
        Log.d("QS", "Start listening");
    }

    /**
     * Called when the user taps the tile.
     */
    @Override
    public void onClick() {
        Log.d("QS", "Tile tapped");

        updateTile();
    }

    /**
     * Called when this tile moves out of the listening state.
     */
    @Override
    public void onStopListening() {
        Log.d("QS", "Stop Listening");
    }

    /**
     * Called when the user removes this tile from Quick Settings.
     */
    @Override
    public void onTileRemoved() {
        Log.d("QS", "Tile removed");
    }

    // Changes the appearance of the tile.
    private void updateTile() {

        Tile tile = this.getQsTile();
        boolean isActive = getServiceStatus();

        Icon newIcon;
        String newLabel;
        int newState;

        // Change the tile to match the service status.
        if (isActive) {

            newLabel = String.format(Locale.US,
                    "%s %s",
                    getString(R.string.tile_label),
                    getString(R.string.service_active));

            newIcon = Icon.createWithResource(getApplicationContext(),
                    ic_android_black_24dp);

            newState = Tile.STATE_ACTIVE;

        } else {
            newLabel = String.format(Locale.US,
                    "%s %s",
                    getString(R.string.tile_label),
                    getString(R.string.service_inactive));

            newIcon =
                    Icon.createWithResource(getApplicationContext(),
                            android.R.drawable.ic_dialog_alert);

            newState = Tile.STATE_INACTIVE;
        }

        // Change the UI of the tile.
        tile.setLabel(newLabel);
        tile.setIcon(newIcon);
        tile.setState(newState);

        // Need to call updateTile for the tile to pick up changes.
        tile.updateTile();
    }

    // Access storage to see how many times the tile
    // has been tapped.
    private boolean getServiceStatus() {

        SharedPreferences prefs =
                getApplicationContext()
                        .getSharedPreferences(PREFERENCES_KEY,
                                MODE_PRIVATE);

        boolean isActive = prefs.getBoolean(SERVICE_STATUS_FLAG, false);
        isActive = !isActive;

        prefs.edit().putBoolean(SERVICE_STATUS_FLAG, isActive).apply();

        return isActive;
    }
}

@@ -1522,19 +1522,20 @@
  public 
-int
+void
  onTileA
@@ -1582,53 +1582,8 @@
 %22);%0A
-        return TileService.TILE_MODE_ACTIVE;%0A
     

Change method to match super, log output instead of returning undefined integer, fixes IO16 code lab.