Java tutorial
/* * Copyright (C) 2011 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.dialer.calllog; import com.google.common.collect.Maps; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.ComponentName; import android.content.ContentResolver; import android.content.ContentUris; import android.content.Context; import android.content.Intent; import android.content.res.Resources; import android.net.Uri; import android.support.annotation.Nullable; import android.support.v4.util.Pair; import android.telecom.PhoneAccount; import android.telecom.PhoneAccountHandle; import android.telephony.TelephonyManager; import android.text.TextUtils; import android.util.Log; import com.android.contacts.common.ContactsUtils; import com.android.contacts.common.compat.TelephonyManagerCompat; import com.android.contacts.common.util.ContactDisplayUtils; import com.android.dialer.DialtactsActivity; import com.android.dialer.R; import com.android.dialer.calllog.CallLogNotificationsHelper.NewCall; import com.android.dialer.filterednumber.FilteredNumbersUtil; import com.android.dialer.list.ListsFragment; import com.android.dialer.util.TelecomUtil; import java.util.Iterator; import java.util.List; import java.util.Map; /** * Shows a voicemail notification in the status bar. */ public class DefaultVoicemailNotifier { public static final String TAG = "VoicemailNotifier"; /** The tag used to identify notifications from this class. */ private static final String NOTIFICATION_TAG = "DefaultVoicemailNotifier"; /** The identifier of the notification of new voicemails. */ private static final int NOTIFICATION_ID = 1; /** The singleton instance of {@link DefaultVoicemailNotifier}. */ private static DefaultVoicemailNotifier sInstance; private final Context mContext; /** Returns the singleton instance of the {@link DefaultVoicemailNotifier}. */ public static DefaultVoicemailNotifier getInstance(Context context) { if (sInstance == null) { ContentResolver contentResolver = context.getContentResolver(); sInstance = new DefaultVoicemailNotifier(context); } return sInstance; } private DefaultVoicemailNotifier(Context context) { mContext = context; } /** * Updates the notification and notifies of the call with the given URI. * * Clears the notification if there are no new voicemails, and notifies if the given URI * corresponds to a new voicemail. * * It is not safe to call this method from the main thread. */ public void updateNotification(Uri newCallUri) { // Lookup the list of new voicemails to include in the notification. // TODO: Move this into a service, to avoid holding the receiver up. final List<NewCall> newCalls = CallLogNotificationsHelper.getInstance(mContext).getNewVoicemails(); if (newCalls == null) { // Query failed, just return. return; } if (newCalls.isEmpty()) { // No voicemails to notify about: clear the notification. getNotificationManager().cancel(NOTIFICATION_TAG, NOTIFICATION_ID); return; } Resources resources = mContext.getResources(); // This represents a list of names to include in the notification. String callers = null; // Maps each number into a name: if a number is in the map, it has already left a more // recent voicemail. final Map<String, String> names = Maps.newHashMap(); // Determine the call corresponding to the new voicemail we have to notify about. NewCall callToNotify = null; // Iterate over the new voicemails to determine all the information above. Iterator<NewCall> itr = newCalls.iterator(); while (itr.hasNext()) { NewCall newCall = itr.next(); // Skip notifying for numbers which are blocked. if (FilteredNumbersUtil.shouldBlockVoicemail(mContext, newCall.number, newCall.countryIso, newCall.dateMs)) { itr.remove(); // Delete the voicemail. mContext.getContentResolver().delete(newCall.voicemailUri, null, null); continue; } // Check if we already know the name associated with this number. String name = names.get(newCall.number); if (name == null) { name = CallLogNotificationsHelper.getInstance(mContext).getName(newCall.number, newCall.numberPresentation, newCall.countryIso); names.put(newCall.number, name); // This is a new caller. Add it to the back of the list of callers. if (TextUtils.isEmpty(callers)) { callers = name; } else { callers = resources.getString(R.string.notification_voicemail_callers_list, callers, name); } } // Check if this is the new call we need to notify about. if (newCallUri != null && newCall.voicemailUri != null && ContentUris.parseId(newCallUri) == ContentUris.parseId(newCall.voicemailUri)) { callToNotify = newCall; } } // All the potential new voicemails have been removed, e.g. if they were spam. if (newCalls.isEmpty()) { return; } // If there is only one voicemail, set its transcription as the "long text". String transcription = null; if (newCalls.size() == 1) { transcription = newCalls.get(0).transcription; } if (newCallUri != null && callToNotify == null) { Log.e(TAG, "The new call could not be found in the call log: " + newCallUri); } // Determine the title of the notification and the icon for it. final String title = resources.getQuantityString(R.plurals.notification_voicemail_title, newCalls.size(), newCalls.size()); // TODO: Use the photo of contact if all calls are from the same person. final int icon = android.R.drawable.stat_notify_voicemail; Pair<Uri, Integer> info = getNotificationInfo(callToNotify); Notification.Builder notificationBuilder = new Notification.Builder(mContext).setSmallIcon(icon) .setContentTitle(title).setContentText(callers) .setStyle(new Notification.BigTextStyle().bigText(transcription)) .setColor(resources.getColor(R.color.dialer_theme_color)).setSound(info.first) .setDefaults(info.second).setDeleteIntent(createMarkNewVoicemailsAsOldIntent()).setAutoCancel(true); // Determine the intent to fire when the notification is clicked on. final Intent contentIntent; // Open the call log. contentIntent = new Intent(mContext, DialtactsActivity.class); contentIntent.putExtra(DialtactsActivity.EXTRA_SHOW_TAB, ListsFragment.TAB_INDEX_VOICEMAIL); notificationBuilder.setContentIntent( PendingIntent.getActivity(mContext, 0, contentIntent, PendingIntent.FLAG_UPDATE_CURRENT)); // The text to show in the ticker, describing the new event. if (callToNotify != null) { CharSequence msg = ContactDisplayUtils.getTtsSpannedPhoneNumber(resources, R.string.notification_new_voicemail_ticker, names.get(callToNotify.number)); notificationBuilder.setTicker(msg); } Log.i(TAG, "Creating voicemail notification"); getNotificationManager().notify(NOTIFICATION_TAG, NOTIFICATION_ID, notificationBuilder.build()); } /** * Determines which ringtone Uri and Notification defaults to use when updating the notification * for the given call. */ private Pair<Uri, Integer> getNotificationInfo(@Nullable NewCall callToNotify) { Log.v(TAG, "getNotificationInfo"); if (callToNotify == null) { Log.i(TAG, "callToNotify == null"); return new Pair<>(null, 0); } PhoneAccountHandle accountHandle = null; if (callToNotify.accountComponentName == null || callToNotify.accountId == null) { Log.v(TAG, "accountComponentName == null || callToNotify.accountId == null"); accountHandle = TelecomUtil.getDefaultOutgoingPhoneAccount(mContext, PhoneAccount.SCHEME_TEL); if (accountHandle == null) { Log.i(TAG, "No default phone account found, using default notification ringtone"); return new Pair<>(null, Notification.DEFAULT_ALL); } } else { accountHandle = new PhoneAccountHandle( ComponentName.unflattenFromString(callToNotify.accountComponentName), callToNotify.accountId); } if (accountHandle.getComponentName() != null) { Log.v(TAG, "PhoneAccountHandle.ComponentInfo:" + accountHandle.getComponentName()); } else { Log.i(TAG, "PhoneAccountHandle.ComponentInfo: null"); } return new Pair<>(TelephonyManagerCompat.getVoicemailRingtoneUri(getTelephonyManager(), accountHandle), getNotificationDefaults(accountHandle)); } private int getNotificationDefaults(PhoneAccountHandle accountHandle) { if (ContactsUtils.FLAG_N_FEATURE) { return TelephonyManagerCompat.isVoicemailVibrationEnabled(getTelephonyManager(), accountHandle) ? Notification.DEFAULT_VIBRATE : 0; } return Notification.DEFAULT_ALL; } /** Creates a pending intent that marks all new voicemails as old. */ private PendingIntent createMarkNewVoicemailsAsOldIntent() { Intent intent = new Intent(mContext, CallLogNotificationsService.class); intent.setAction(CallLogNotificationsService.ACTION_MARK_NEW_VOICEMAILS_AS_OLD); return PendingIntent.getService(mContext, 0, intent, 0); } private NotificationManager getNotificationManager() { return (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE); } private TelephonyManager getTelephonyManager() { return (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); } }