Android Open Source - AndroidWearable-Samples Set Timer Activity

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright (C) 2011 The Android Open Source Project
 *// w ww .j  a  v  a 2  s.  c om
 * 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.timer;

import android.app.Activity;
import android.app.AlarmManager;
import android.app.Notification;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.content.res.Resources;
import android.os.Bundle;
import android.provider.AlarmClock;
import android.support.v4.app.NotificationCompat;
import android.support.v4.app.NotificationManagerCompat;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import com.example.android.wearable.timer.util.Constants;
import com.example.android.wearable.timer.util.TimerFormat;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.wearable.Wearable;

/** This class sets a timer. */
public class SetTimerActivity extends Activity
        implements AdapterView.OnItemClickListener, GoogleApiClient.ConnectionCallbacks,
        GoogleApiClient.OnConnectionFailedListener {

    public static final int NUMBER_OF_TIMES = 10;
    public static final String TAG = "SetTimerActivity";

    private ListViewItem[] mTimeOptions = new ListViewItem[NUMBER_OF_TIMES];
    private ListView mListView;
    private GoogleApiClient mGoogleApiClient;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        int paramLength = getIntent().getIntExtra(AlarmClock.EXTRA_LENGTH, 0);
        if (Log.isLoggable(TAG, Log.DEBUG)) {
            Log.d(TAG, "SetTimerActivity:onCreate=" + paramLength);
        }
        if (paramLength > 0 && paramLength <= 86400) {
            long durationMillis = paramLength * 1000;
            setupTimer(durationMillis);
            finish();
            return;
        }

        Resources res = getResources();
        for (int i = 0; i < NUMBER_OF_TIMES; i++) {
            mTimeOptions[i] = new ListViewItem(
                    res.getQuantityString(R.plurals.timer_minutes, i + 1, i + 1),
                    (i + 1) * 60 * 1000);
        }

        setContentView(R.layout.timer_set_timer);

        // Initialize a simple list of countdown time options.
        mListView = (ListView) findViewById(R.id.times_list_view);
        ArrayAdapter<ListViewItem> arrayAdapter = new ArrayAdapter<ListViewItem>(this,
                android.R.layout.simple_list_item_1, mTimeOptions);
        mListView.setAdapter(arrayAdapter);
        mListView.setOnItemClickListener(this);

        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addApi(Wearable.API)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .build();
    }

    @Override
    protected void onStart() {
        super.onStart();
        mGoogleApiClient.connect();
    }

    @Override
    protected void onStop() {
        super.onStop();
        mGoogleApiClient.disconnect();
    }

    /**
     * Sets up an alarm (and an associated notification) to go off after <code>duration</code>
     * milliseconds.
     */
    private void setupTimer(long duration) {
        NotificationManagerCompat notifyMgr = NotificationManagerCompat.from(this);

        // Delete dataItem and cancel a potential old countdown.
        cancelCountdown(notifyMgr);

        // Build notification and set it.
        notifyMgr.notify(Constants.NOTIFICATION_TIMER_COUNTDOWN, buildNotification(duration));

        // Register with the alarm manager to display a notification when the timer is done.
        registerWithAlarmManager(duration);

        finish();
    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        long duration = mTimeOptions[position].duration;
        setupTimer(duration);
    }

    private void registerWithAlarmManager(long duration) {
        // Get the alarm manager.
        AlarmManager alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE);

        // Create intent that gets fired when timer expires.
        Intent intent = new Intent(Constants.ACTION_SHOW_ALARM, null, this,
                TimerNotificationService.class);
        PendingIntent pendingIntent = PendingIntent.getService(this, 0, intent,
                PendingIntent.FLAG_UPDATE_CURRENT);

        // Calculate the time when it expires.
        long wakeupTime = System.currentTimeMillis() + duration;

        // Schedule an alarm.
        alarm.setExact(AlarmManager.RTC_WAKEUP, wakeupTime, pendingIntent);
    }

    /**
     * Build a notification including different actions and other various setup and return it.
     *
     * @param duration the duration of the timer.
     * @return the notification to display.
     */

    private Notification buildNotification(long duration) {
        // Intent to restart a timer.
        Intent restartIntent = new Intent(Constants.ACTION_RESTART_ALARM, null, this,
                TimerNotificationService.class);
        PendingIntent pendingIntentRestart = PendingIntent
                .getService(this, 0, restartIntent, PendingIntent.FLAG_UPDATE_CURRENT);

        // Intent to delete a timer.
        Intent deleteIntent = new Intent(Constants.ACTION_DELETE_ALARM, null, this,
                TimerNotificationService.class);
        PendingIntent pendingIntentDelete = PendingIntent
                .getService(this, 0, deleteIntent, PendingIntent.FLAG_UPDATE_CURRENT);

        // Create countdown notification using a chronometer style.
        return new NotificationCompat.Builder(this)
                .setSmallIcon(R.drawable.ic_cc_alarm)
                .setContentTitle(getString(R.string.timer_time_left))
                .setContentText(TimerFormat.getTimeString(duration))
                .setUsesChronometer(true)
                .setWhen(System.currentTimeMillis() + duration)
                .addAction(R.drawable.ic_cc_alarm, getString(R.string.timer_restart),
                        pendingIntentRestart)
                .addAction(R.drawable.ic_cc_alarm, getString(R.string.timer_delete),
                        pendingIntentDelete)
                .setDeleteIntent(pendingIntentDelete)
                .setLocalOnly(true)
                .build();
    }

    /**
     * Cancels an old countdown and deletes the dataItem.
     *
     * @param notifyMgr the notification manager.
     */
    private void cancelCountdown(NotificationManagerCompat notifyMgr) {
        notifyMgr.cancel(Constants.NOTIFICATION_TIMER_EXPIRED);
    }

    /** Model class for the listview. */
    private static class ListViewItem {

        // Duration in milliseconds.
        long duration;
        // Label to display.
        private String label;

        public ListViewItem(String label, long duration) {
            this.label = label;
            this.duration = duration;
        }

        @Override
        public String toString() {
            return label;
        }
    }

    @Override
    public void onConnected(Bundle connectionHint) {
    }

    @Override
    public void onConnectionSuspended(int cause) {
    }

    @Override
    public void onConnectionFailed(ConnectionResult result) {
    }
}

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