prebuilts/gradle/SpeedTracker/Wearable/src/main/java/com/example/android/wearable/speedtracker/SpeedPickerActivity.java

/*
 * Copyright (C) 2014 Google Inc. All Rights Reserved.
 *
 * 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.example.android.wearable.speedtracker;

import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.wearable.view.WearableListView;
import android.widget.TextView;

import com.example.android.wearable.speedtracker.ui.SpeedPickerListAdapter;

/**
 * An activity that presents a list of speeds to user and allows user to pick one, to be used as
 * the current speed limit.
 */
public class SpeedPickerActivity extends Activity implements WearableListView.ClickListener {

    /* Speeds, in mph, that will be shown on the list */
    private int[] speeds = {25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75};

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.speed_picker_activity);

        final TextView header = (TextView) findViewById(R.id.header);

        // Get the list component from the layout of the activity
        WearableListView listView = (WearableListView) findViewById(R.id.wearable_list);

        // Assign an adapter to the list
        listView.setAdapter(new SpeedPickerListAdapter(this, speeds));

        // Set a click listener
        listView.setClickListener(this);

        listView.addOnScrollListener(new WearableListView.OnScrollListener() {
            @Override
            public void onScroll(int i) {
            }

            @Override
            public void onAbsoluteScrollChange(int i) {
                // only scroll the header up from the base position, not down...
                if (i > 0) {
                    header.setY(-i);
                }
            }

            @Override
            public void onScrollStateChanged(int i) {
            }

            @Override
            public void onCentralPositionChanged(int i) {
            }
        });
    }

    @Override
    public void onClick(WearableListView.ViewHolder viewHolder) {
        SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(this);
        pref.edit().putInt(WearableMainActivity.PREFS_SPEED_LIMIT_KEY,
                speeds[viewHolder.getPosition()]).apply();
        finish();
    }

    @Override
    public void onTopEmptyRegionClick() {
    }
}