Update dialer sources.

Test: Built package and system image.

This change clobbers the old source, and is an export
from an internal Google repository.

The internal repository was forked form Android in March,
and this change includes modifications since then, to
near the v8 release.

Since the fork, we've moved code from monolithic to independent modules. In addition,
we've switched to Blaze/Bazel as the build sysetm. This export, however, still uses make.

New dependencies have been added:
- Dagger
- Auto-Value
- Glide
- Libshortcutbadger

Going forward, development will still be in Google3, and the Gerrit release
will become an automated export, with the next drop happening in ~ two weeks.

Android.mk includes local modifications from ToT.

Abridged changelog:

Bug fixes
● Not able to mute, add a call when using Phone app in multiwindow mode
● Double tap on keypad triggering multiple key and tones
● Reported spam numbers not showing as spam in the call log
● Crash when user tries to block number while Phone app is not set as default
● Crash when user picks a number from search auto-complete list

Visual Voicemail (VVM) improvements
● Share Voicemail audio via standard exporting mechanisms that support file attachment
(email, MMS, etc.)
● Make phone number, email and web sites in VVM transcript clickable
● Set PIN before declining VVM Terms of Service {Carrier}
● Set client type for outbound visual voicemail SMS {Carrier}

New incoming call and incall UI on older devices
(Android M)
● Updated Phone app icon
● New incall UI (large buttons, button labels)
● New and animated Answer/Reject gestures

Accessibility
● Add custom answer/decline call buttons on answer screen for touch exploration
accessibility services
● Increase size of touch target
● Add verbal feedback when a Voicemail fails to load
● Fix pressing of Phone buttons while in a phone call using Switch Access
● Fix selecting and opening contacts in talkback mode
● Split focus for ‘Learn More’ link in caller id & spam to help distinguish similar text

Other
● Backup & Restore for App Preferences
● Prompt user to enable Wi-Fi calling if the call ends due to out of service and Wi-Fi is
connected
● Rename “Dialpad” to “Keypad”
● Show "Private number" for restricted calls
● Delete unused items (vcard, add contact, call history) from Phone menu

Change-Id: I2a7e53532a24c21bf308bf0a6d178d7ddbca4958

1 files changed, 1050 insertions, 0 deletions

diff --git a/java/com/android/dialer/app/voicemail/VoicemailPlaybackPresenter.java b/java/com/android/dialer/app/voicemail/VoicemailPlaybackPresenter.java
new file mode 100644
index 000000000..657022291
--- /dev/null
+++ b/java/com/android/dialer/app/voicemail/VoicemailPlaybackPresenter.java
@@ -0,0 +1,1050 @@
+/*
+ * 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.app.voicemail;
+
+import android.annotation.TargetApi;
+import android.app.Activity;
+import android.content.ContentResolver;
+import android.content.ContentUris;
+import android.content.Context;
+import android.content.Intent;
+import android.database.ContentObserver;
+import android.database.Cursor;
+import android.media.MediaPlayer;
+import android.net.Uri;
+import android.os.AsyncTask;
+import android.os.Build.VERSION_CODES;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.PowerManager;
+import android.provider.CallLog;
+import android.provider.VoicemailContract;
+import android.provider.VoicemailContract.Voicemails;
+import android.support.annotation.MainThread;
+import android.support.annotation.Nullable;
+import android.support.annotation.VisibleForTesting;
+import android.support.v4.content.FileProvider;
+import android.text.TextUtils;
+import android.view.WindowManager.LayoutParams;
+import android.webkit.MimeTypeMap;
+import com.android.common.io.MoreCloseables;
+import com.android.dialer.app.R;
+import com.android.dialer.app.calllog.CallLogListItemViewHolder;
+import com.android.dialer.common.Assert;
+import com.android.dialer.common.AsyncTaskExecutor;
+import com.android.dialer.common.AsyncTaskExecutors;
+import com.android.dialer.common.LogUtil;
+import com.android.dialer.constants.Constants;
+import com.android.dialer.phonenumbercache.CallLogQuery;
+import com.google.common.io.ByteStreams;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
+import javax.annotation.concurrent.NotThreadSafe;
+import javax.annotation.concurrent.ThreadSafe;
+
+/**
+ * Contains the controlling logic for a voicemail playback in the call log. It is closely coupled to
+ * assumptions about the behaviors and lifecycle of the call log, in particular in the {@link
+ * CallLogFragment} and {@link CallLogAdapter}.
+ *
+ * <p>This controls a single {@link com.android.dialer.voicemail.VoicemailPlaybackLayout}. A single
+ * instance can be reused for different such layouts, using {@link #setPlaybackView}. This is to
+ * facilitate reuse across different voicemail call log entries.
+ *
+ * <p>This class is not thread safe. The thread policy for this class is thread-confinement, all
+ * calls into this class from outside must be done from the main UI thread.
+ */
+@NotThreadSafe
+@VisibleForTesting
+@TargetApi(VERSION_CODES.M)
+public class VoicemailPlaybackPresenter
+    implements MediaPlayer.OnPreparedListener,
+        MediaPlayer.OnCompletionListener,
+        MediaPlayer.OnErrorListener {
+
+  public static final int PLAYBACK_REQUEST = 0;
+  private static final int NUMBER_OF_THREADS_IN_POOL = 2;
+  // Time to wait for content to be fetched before timing out.
+  private static final long FETCH_CONTENT_TIMEOUT_MS = 20000;
+  private static final String VOICEMAIL_URI_KEY =
+      VoicemailPlaybackPresenter.class.getName() + ".VOICEMAIL_URI";
+  private static final String IS_PREPARED_KEY =
+      VoicemailPlaybackPresenter.class.getName() + ".IS_PREPARED";
+  // If present in the saved instance bundle, we should not resume playback on create.
+  private static final String IS_PLAYING_STATE_KEY =
+      VoicemailPlaybackPresenter.class.getName() + ".IS_PLAYING_STATE_KEY";
+  // If present in the saved instance bundle, indicates where to set the playback slider.
+  private static final String CLIP_POSITION_KEY =
+      VoicemailPlaybackPresenter.class.getName() + ".CLIP_POSITION_KEY";
+  private static final String IS_SPEAKERPHONE_ON_KEY =
+      VoicemailPlaybackPresenter.class.getName() + ".IS_SPEAKER_PHONE_ON";
+  private static final String VOICEMAIL_SHARE_FILE_NAME_DATE_FORMAT = "MM-dd-yy_hhmmaa";
+  private static VoicemailPlaybackPresenter sInstance;
+  private static ScheduledExecutorService mScheduledExecutorService;
+  /**
+   * The most recently cached duration. We cache this since we don't want to keep requesting it from
+   * the player, as this can easily lead to throwing {@link IllegalStateException} (any time the
+   * player is released, it's illegal to ask for the duration).
+   */
+  private final AtomicInteger mDuration = new AtomicInteger(0);
+
+  protected Context mContext;
+  private long mRowId;
+  protected Uri mVoicemailUri;
+  protected MediaPlayer mMediaPlayer;
+  // Used to run async tasks that need to interact with the UI.
+  protected AsyncTaskExecutor mAsyncTaskExecutor;
+  private Activity mActivity;
+  private PlaybackView mView;
+  private int mPosition;
+  private boolean mIsPlaying;
+  // MediaPlayer crashes on some method calls if not prepared but does not have a method which
+  // exposes its prepared state. Store this locally, so we can check and prevent crashes.
+  private boolean mIsPrepared;
+  private boolean mIsSpeakerphoneOn;
+
+  private boolean mShouldResumePlaybackAfterSeeking;
+  /**
+   * Used to handle the result of a successful or time-out fetch result.
+   *
+   * <p>This variable is thread-contained, accessed only on the ui thread.
+   */
+  private FetchResultHandler mFetchResultHandler;
+
+  private PowerManager.WakeLock mProximityWakeLock;
+  private VoicemailAudioManager mVoicemailAudioManager;
+  private OnVoicemailDeletedListener mOnVoicemailDeletedListener;
+
+  /** Initialize variables which are activity-independent and state-independent. */
+  protected VoicemailPlaybackPresenter(Activity activity) {
+    Context context = activity.getApplicationContext();
+    mAsyncTaskExecutor = AsyncTaskExecutors.createAsyncTaskExecutor();
+    mVoicemailAudioManager = new VoicemailAudioManager(context, this);
+    PowerManager powerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
+    if (powerManager.isWakeLockLevelSupported(PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK)) {
+      mProximityWakeLock =
+          powerManager.newWakeLock(
+              PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK, "VoicemailPlaybackPresenter");
+    }
+  }
+
+  /**
+   * Obtain singleton instance of this class. Use a single instance to provide a consistent listener
+   * to the AudioManager when requesting and abandoning audio focus.
+   *
+   * <p>Otherwise, after rotation the previous listener will still be active but a new listener will
+   * be provided to calls to the AudioManager, which is bad. For example, abandoning audio focus
+   * with the new listeners results in an AUDIO_FOCUS_GAIN callback to the previous listener, which
+   * is the opposite of the intended behavior.
+   */
+  @MainThread
+  public static VoicemailPlaybackPresenter getInstance(
+      Activity activity, Bundle savedInstanceState) {
+    if (sInstance == null) {
+      sInstance = new VoicemailPlaybackPresenter(activity);
+    }
+
+    sInstance.init(activity, savedInstanceState);
+    return sInstance;
+  }
+
+  private static synchronized ScheduledExecutorService getScheduledExecutorServiceInstance() {
+    if (mScheduledExecutorService == null) {
+      mScheduledExecutorService = Executors.newScheduledThreadPool(NUMBER_OF_THREADS_IN_POOL);
+    }
+    return mScheduledExecutorService;
+  }
+
+  /** Update variables which are activity-dependent or state-dependent. */
+  @MainThread
+  protected void init(Activity activity, Bundle savedInstanceState) {
+    Assert.isMainThread();
+    mActivity = activity;
+    mContext = activity;
+
+    if (savedInstanceState != null) {
+      // Restores playback state when activity is recreated, such as after rotation.
+      mVoicemailUri = savedInstanceState.getParcelable(VOICEMAIL_URI_KEY);
+      mIsPrepared = savedInstanceState.getBoolean(IS_PREPARED_KEY);
+      mPosition = savedInstanceState.getInt(CLIP_POSITION_KEY, 0);
+      mIsPlaying = savedInstanceState.getBoolean(IS_PLAYING_STATE_KEY, false);
+      mIsSpeakerphoneOn = savedInstanceState.getBoolean(IS_SPEAKERPHONE_ON_KEY, false);
+    }
+
+    if (mMediaPlayer == null) {
+      mIsPrepared = false;
+      mIsPlaying = false;
+    }
+
+    if (mActivity != null) {
+      if (isPlaying()) {
+        mActivity.getWindow().addFlags(LayoutParams.FLAG_KEEP_SCREEN_ON);
+      } else {
+        mActivity.getWindow().clearFlags(LayoutParams.FLAG_KEEP_SCREEN_ON);
+      }
+    }
+  }
+
+  /** Must be invoked when the parent Activity is saving it state. */
+  public void onSaveInstanceState(Bundle outState) {
+    if (mView != null) {
+      outState.putParcelable(VOICEMAIL_URI_KEY, mVoicemailUri);
+      outState.putBoolean(IS_PREPARED_KEY, mIsPrepared);
+      outState.putInt(CLIP_POSITION_KEY, mView.getDesiredClipPosition());
+      outState.putBoolean(IS_PLAYING_STATE_KEY, mIsPlaying);
+      outState.putBoolean(IS_SPEAKERPHONE_ON_KEY, mIsSpeakerphoneOn);
+    }
+  }
+
+  /** Specify the view which this presenter controls and the voicemail to prepare to play. */
+  public void setPlaybackView(
+      PlaybackView view, long rowId, Uri voicemailUri, final boolean startPlayingImmediately) {
+    mRowId = rowId;
+    mView = view;
+    mView.setPresenter(this, voicemailUri);
+    mView.onSpeakerphoneOn(mIsSpeakerphoneOn);
+
+    // Handles cases where the same entry is binded again when scrolling in list, or where
+    // the MediaPlayer was retained after an orientation change.
+    if (mMediaPlayer != null && mIsPrepared && voicemailUri.equals(mVoicemailUri)) {
+      // If the voicemail card was rebinded, we need to set the position to the appropriate
+      // point. Since we retain the media player, we can just set it to the position of the
+      // media player.
+      mPosition = mMediaPlayer.getCurrentPosition();
+      onPrepared(mMediaPlayer);
+    } else {
+      if (!voicemailUri.equals(mVoicemailUri)) {
+        mVoicemailUri = voicemailUri;
+        mPosition = 0;
+      }
+      /*
+       * Check to see if the content field in the DB is set. If set, we proceed to
+       * prepareContent() method. We get the duration of the voicemail from the query and set
+       * it if the content is not available.
+       */
+      checkForContent(
+          new OnContentCheckedListener() {
+            @Override
+            public void onContentChecked(boolean hasContent) {
+              if (hasContent) {
+                prepareContent();
+              } else {
+                if (startPlayingImmediately) {
+                  requestContent(PLAYBACK_REQUEST);
+                }
+                if (mView != null) {
+                  mView.resetSeekBar();
+                  mView.setClipPosition(0, mDuration.get());
+                }
+              }
+            }
+          });
+
+      if (startPlayingImmediately) {
+        // Since setPlaybackView can get called during the view binding process, we don't
+        // want to reset mIsPlaying to false if the user is currently playing the
+        // voicemail and the view is rebound.
+        mIsPlaying = startPlayingImmediately;
+      }
+    }
+  }
+
+  /** Reset the presenter for playback back to its original state. */
+  public void resetAll() {
+    pausePresenter(true);
+
+    mView = null;
+    mVoicemailUri = null;
+  }
+
+  /**
+   * When navigating away from voicemail playback, we need to release the media player, pause the UI
+   * and save the position.
+   *
+   * @param reset {@code true} if we want to reset the position of the playback, {@code false} if we
+   *     want to retain the current position (in case we return to the voicemail).
+   */
+  public void pausePresenter(boolean reset) {
+    pausePlayback();
+    if (mMediaPlayer != null) {
+      mMediaPlayer.release();
+      mMediaPlayer = null;
+    }
+
+    disableProximitySensor(false /* waitForFarState */);
+
+    mIsPrepared = false;
+    mIsPlaying = false;
+
+    if (reset) {
+      // We want to reset the position whether or not the view is valid.
+      mPosition = 0;
+    }
+
+    if (mView != null) {
+      mView.onPlaybackStopped();
+      if (reset) {
+        mView.setClipPosition(0, mDuration.get());
+      } else {
+        mPosition = mView.getDesiredClipPosition();
+      }
+    }
+  }
+
+  /** Must be invoked when the parent activity is resumed. */
+  public void onResume() {
+    mVoicemailAudioManager.registerReceivers();
+  }
+
+  /** Must be invoked when the parent activity is paused. */
+  public void onPause() {
+    mVoicemailAudioManager.unregisterReceivers();
+
+    if (mActivity != null && mIsPrepared && mActivity.isChangingConfigurations()) {
+      // If an configuration change triggers the pause, retain the MediaPlayer.
+      LogUtil.d("VoicemailPlaybackPresenter.onPause", "configuration changed.");
+      return;
+    }
+
+    // Release the media player, otherwise there may be failures.
+    pausePresenter(false);
+  }
+
+  /** Must be invoked when the parent activity is destroyed. */
+  public void onDestroy() {
+    // Clear references to avoid leaks from the singleton instance.
+    mActivity = null;
+    mContext = null;
+
+    if (mScheduledExecutorService != null) {
+      mScheduledExecutorService.shutdown();
+      mScheduledExecutorService = null;
+    }
+
+    if (mFetchResultHandler != null) {
+      mFetchResultHandler.destroy();
+      mFetchResultHandler = null;
+    }
+  }
+
+  /** Checks to see if we have content available for this voicemail. */
+  protected void checkForContent(final OnContentCheckedListener callback) {
+    mAsyncTaskExecutor.submit(
+        Tasks.CHECK_FOR_CONTENT,
+        new AsyncTask<Void, Void, Boolean>() {
+          @Override
+          public Boolean doInBackground(Void... params) {
+            return queryHasContent(mVoicemailUri);
+          }
+
+          @Override
+          public void onPostExecute(Boolean hasContent) {
+            callback.onContentChecked(hasContent);
+          }
+        });
+  }
+
+  private boolean queryHasContent(Uri voicemailUri) {
+    if (voicemailUri == null || mContext == null) {
+      return false;
+    }
+
+    ContentResolver contentResolver = mContext.getContentResolver();
+    Cursor cursor = contentResolver.query(voicemailUri, null, null, null, null);
+    try {
+      if (cursor != null && cursor.moveToNext()) {
+        int duration = cursor.getInt(cursor.getColumnIndex(VoicemailContract.Voicemails.DURATION));
+        // Convert database duration (seconds) into mDuration (milliseconds)
+        mDuration.set(duration > 0 ? duration * 1000 : 0);
+        return cursor.getInt(cursor.getColumnIndex(VoicemailContract.Voicemails.HAS_CONTENT)) == 1;
+      }
+    } finally {
+      MoreCloseables.closeQuietly(cursor);
+    }
+    return false;
+  }
+
+  /**
+   * Makes a broadcast request to ask that a voicemail source fetch this content.
+   *
+   * <p>This method <b>must be called on the ui thread</b>.
+   *
+   * <p>This method will be called when we realise that we don't have content for this voicemail. It
+   * will trigger a broadcast to request that the content be downloaded. It will add a listener to
+   * the content resolver so that it will be notified when the has_content field changes. It will
+   * also set a timer. If the has_content field changes to true within the allowed time, we will
+   * proceed to {@link #prepareContent()}. If the has_content field does not become true within the
+   * allowed time, we will update the ui to reflect the fact that content was not available.
+   *
+   * @return whether issued request to fetch content
+   */
+  protected boolean requestContent(int code) {
+    if (mContext == null || mVoicemailUri == null) {
+      return false;
+    }
+
+    FetchResultHandler tempFetchResultHandler =
+        new FetchResultHandler(new Handler(), mVoicemailUri, code);
+
+    switch (code) {
+      default:
+        if (mFetchResultHandler != null) {
+          mFetchResultHandler.destroy();
+        }
+        mView.setIsFetchingContent();
+        mFetchResultHandler = tempFetchResultHandler;
+        break;
+    }
+
+    mAsyncTaskExecutor.submit(
+        Tasks.SEND_FETCH_REQUEST,
+        new AsyncTask<Void, Void, Void>() {
+
+          @Override
+          protected Void doInBackground(Void... voids) {
+            try (Cursor cursor =
+                mContext
+                    .getContentResolver()
+                    .query(
+                        mVoicemailUri,
+                        new String[] {Voicemails.SOURCE_PACKAGE},
+                        null,
+                        null,
+                        null)) {
+              String sourcePackage;
+              if (!hasContent(cursor)) {
+                LogUtil.e(
+                    "VoicemailPlaybackPresenter.requestContent",
+                    "mVoicemailUri does not return a SOURCE_PACKAGE");
+                sourcePackage = null;
+              } else {
+                sourcePackage = cursor.getString(0);
+              }
+              // Send voicemail fetch request.
+              Intent intent = new Intent(VoicemailContract.ACTION_FETCH_VOICEMAIL, mVoicemailUri);
+              intent.setPackage(sourcePackage);
+              LogUtil.i(
+                  "VoicemailPlaybackPresenter.requestContent",
+                  "Sending ACTION_FETCH_VOICEMAIL to " + sourcePackage);
+              mContext.sendBroadcast(intent);
+            }
+            return null;
+          }
+        });
+    return true;
+  }
+
+  /**
+   * Prepares the voicemail content for playback.
+   *
+   * <p>This method will be called once we know that our voicemail has content (according to the
+   * content provider). this method asynchronously tries to prepare the data source through the
+   * media player. If preparation is successful, the media player will {@link #onPrepared()}, and it
+   * will call {@link #onError()} otherwise.
+   */
+  protected void prepareContent() {
+    if (mView == null) {
+      return;
+    }
+    LogUtil.d("VoicemailPlaybackPresenter.prepareContent", null);
+
+    // Release the previous media player, otherwise there may be failures.
+    if (mMediaPlayer != null) {
+      mMediaPlayer.release();
+      mMediaPlayer = null;
+    }
+
+    mView.disableUiElements();
+    mIsPrepared = false;
+
+    try {
+      mMediaPlayer = new MediaPlayer();
+      mMediaPlayer.setOnPreparedListener(this);
+      mMediaPlayer.setOnErrorListener(this);
+      mMediaPlayer.setOnCompletionListener(this);
+
+      mMediaPlayer.reset();
+      mMediaPlayer.setDataSource(mContext, mVoicemailUri);
+      mMediaPlayer.setAudioStreamType(VoicemailAudioManager.PLAYBACK_STREAM);
+      mMediaPlayer.prepareAsync();
+    } catch (IOException e) {
+      handleError(e);
+    }
+  }
+
+  /**
+   * Once the media player is prepared, enables the UI and adopts the appropriate playback state.
+   */
+  @Override
+  public void onPrepared(MediaPlayer mp) {
+    if (mView == null || mContext == null) {
+      return;
+    }
+    LogUtil.d("VoicemailPlaybackPresenter.onPrepared", null);
+    mIsPrepared = true;
+
+    mDuration.set(mMediaPlayer.getDuration());
+
+    LogUtil.d("VoicemailPlaybackPresenter.onPrepared", "mPosition=" + mPosition);
+    mView.setClipPosition(mPosition, mDuration.get());
+    mView.enableUiElements();
+    mView.setSuccess();
+    mMediaPlayer.seekTo(mPosition);
+
+    if (mIsPlaying) {
+      resumePlayback();
+    } else {
+      pausePlayback();
+    }
+  }
+
+  /**
+   * Invoked if preparing the media player fails, for example, if file is missing or the voicemail
+   * is an unknown file format that can't be played.
+   */
+  @Override
+  public boolean onError(MediaPlayer mp, int what, int extra) {
+    handleError(new IllegalStateException("MediaPlayer error listener invoked: " + extra));
+    return true;
+  }
+
+  protected void handleError(Exception e) {
+    LogUtil.e("VoicemailPlaybackPresenter.handlerError", "could not play voicemail", e);
+
+    if (mIsPrepared) {
+      mMediaPlayer.release();
+      mMediaPlayer = null;
+      mIsPrepared = false;
+    }
+
+    if (mView != null) {
+      mView.onPlaybackError();
+    }
+
+    mPosition = 0;
+    mIsPlaying = false;
+  }
+
+  /** After done playing the voicemail clip, reset the clip position to the start. */
+  @Override
+  public void onCompletion(MediaPlayer mediaPlayer) {
+    pausePlayback();
+
+    // Reset the seekbar position to the beginning.
+    mPosition = 0;
+    if (mView != null) {
+      mediaPlayer.seekTo(0);
+      mView.setClipPosition(0, mDuration.get());
+    }
+  }
+
+  /**
+   * Only play voicemail when audio focus is granted. When it is lost (usually by another
+   * application requesting focus), pause playback. Audio focus gain/lost only triggers the focus is
+   * requested. Audio focus is requested when the user pressed play and abandoned when the user
+   * pressed pause or the audio has finished. Losing focus should not abandon focus as the voicemail
+   * should resume once the focus is returned.
+   *
+   * @param gainedFocus {@code true} if the audio focus was gained, {@code} false otherwise.
+   */
+  public void onAudioFocusChange(boolean gainedFocus) {
+    if (mIsPlaying == gainedFocus) {
+      // Nothing new here, just exit.
+      return;
+    }
+
+    if (gainedFocus) {
+      resumePlayback();
+    } else {
+      pausePlayback(true);
+    }
+  }
+
+  /**
+   * Resumes voicemail playback at the clip position stored by the presenter. Null-op if already
+   * playing.
+   */
+  public void resumePlayback() {
+    if (mView == null) {
+      return;
+    }
+
+    if (!mIsPrepared) {
+      /*
+       * Check content before requesting content to avoid duplicated requests. It is possible
+       * that the UI doesn't know content has arrived if the fetch took too long causing a
+       * timeout, but succeeded.
+       */
+      checkForContent(
+          new OnContentCheckedListener() {
+            @Override
+            public void onContentChecked(boolean hasContent) {
+              if (!hasContent) {
+                // No local content, download from server. Queue playing if the request was
+                // issued,
+                mIsPlaying = requestContent(PLAYBACK_REQUEST);
+              } else {
+                // Queue playing once the media play loaded the content.
+                mIsPlaying = true;
+                prepareContent();
+              }
+            }
+          });
+      return;
+    }
+
+    mIsPlaying = true;
+
+    mActivity.getWindow().addFlags(LayoutParams.FLAG_KEEP_SCREEN_ON);
+
+    if (mMediaPlayer != null && !mMediaPlayer.isPlaying()) {
+      // Clamp the start position between 0 and the duration.
+      mPosition = Math.max(0, Math.min(mPosition, mDuration.get()));
+
+      mMediaPlayer.seekTo(mPosition);
+
+      try {
+        // Grab audio focus.
+        // Can throw RejectedExecutionException.
+        mVoicemailAudioManager.requestAudioFocus();
+        mMediaPlayer.start();
+        setSpeakerphoneOn(mIsSpeakerphoneOn);
+        mVoicemailAudioManager.setSpeakerphoneOn(mIsSpeakerphoneOn);
+      } catch (RejectedExecutionException e) {
+        handleError(e);
+      }
+    }
+
+    LogUtil.d("VoicemailPlaybackPresenter.resumePlayback", "resumed playback at %d.", mPosition);
+    mView.onPlaybackStarted(mDuration.get(), getScheduledExecutorServiceInstance());
+  }
+
+  /** Pauses voicemail playback at the current position. Null-op if already paused. */
+  public void pausePlayback() {
+    pausePlayback(false);
+  }
+
+  private void pausePlayback(boolean keepFocus) {
+    if (!mIsPrepared) {
+      return;
+    }
+
+    mIsPlaying = false;
+
+    if (mMediaPlayer != null && mMediaPlayer.isPlaying()) {
+      mMediaPlayer.pause();
+    }
+
+    mPosition = mMediaPlayer == null ? 0 : mMediaPlayer.getCurrentPosition();
+
+    LogUtil.d("VoicemailPlaybackPresenter.pausePlayback", "paused playback at %d.", mPosition);
+
+    if (mView != null) {
+      mView.onPlaybackStopped();
+    }
+
+    if (!keepFocus) {
+      mVoicemailAudioManager.abandonAudioFocus();
+    }
+    if (mActivity != null) {
+      mActivity.getWindow().clearFlags(LayoutParams.FLAG_KEEP_SCREEN_ON);
+    }
+    disableProximitySensor(true /* waitForFarState */);
+  }
+
+  /**
+   * Pauses playback when the user starts seeking the position, and notes whether the voicemail is
+   * playing to know whether to resume playback once the user selects a new position.
+   */
+  public void pausePlaybackForSeeking() {
+    if (mMediaPlayer != null) {
+      mShouldResumePlaybackAfterSeeking = mMediaPlayer.isPlaying();
+    }
+    pausePlayback(true);
+  }
+
+  public void resumePlaybackAfterSeeking(int desiredPosition) {
+    mPosition = desiredPosition;
+    if (mShouldResumePlaybackAfterSeeking) {
+      mShouldResumePlaybackAfterSeeking = false;
+      resumePlayback();
+    }
+  }
+
+  /**
+   * Seek to position. This is called when user manually seek the playback. It could be either by
+   * touch or volume button while in talkback mode.
+   */
+  public void seek(int position) {
+    mPosition = position;
+    mMediaPlayer.seekTo(mPosition);
+  }
+
+  private void enableProximitySensor() {
+    if (mProximityWakeLock == null
+        || mIsSpeakerphoneOn
+        || !mIsPrepared
+        || mMediaPlayer == null
+        || !mMediaPlayer.isPlaying()) {
+      return;
+    }
+
+    if (!mProximityWakeLock.isHeld()) {
+      LogUtil.i(
+          "VoicemailPlaybackPresenter.enableProximitySensor", "acquiring proximity wake lock");
+      mProximityWakeLock.acquire();
+    } else {
+      LogUtil.i(
+          "VoicemailPlaybackPresenter.enableProximitySensor",
+          "proximity wake lock already acquired");
+    }
+  }
+
+  private void disableProximitySensor(boolean waitForFarState) {
+    if (mProximityWakeLock == null) {
+      return;
+    }
+    if (mProximityWakeLock.isHeld()) {
+      LogUtil.i(
+          "VoicemailPlaybackPresenter.disableProximitySensor", "releasing proximity wake lock");
+      int flags = waitForFarState ? PowerManager.RELEASE_FLAG_WAIT_FOR_NO_PROXIMITY : 0;
+      mProximityWakeLock.release(flags);
+    } else {
+      LogUtil.i(
+          "VoicemailPlaybackPresenter.disableProximitySensor",
+          "proximity wake lock already released");
+    }
+  }
+
+  /** This is for use by UI interactions only. It simplifies UI logic. */
+  public void toggleSpeakerphone() {
+    mVoicemailAudioManager.setSpeakerphoneOn(!mIsSpeakerphoneOn);
+    setSpeakerphoneOn(!mIsSpeakerphoneOn);
+  }
+
+  public void setOnVoicemailDeletedListener(OnVoicemailDeletedListener listener) {
+    mOnVoicemailDeletedListener = listener;
+  }
+
+  public int getMediaPlayerPosition() {
+    return mIsPrepared && mMediaPlayer != null ? mMediaPlayer.getCurrentPosition() : 0;
+  }
+
+  void onVoicemailDeleted(CallLogListItemViewHolder viewHolder) {
+    if (mOnVoicemailDeletedListener != null) {
+      mOnVoicemailDeletedListener.onVoicemailDeleted(viewHolder, mVoicemailUri);
+    }
+  }
+
+  void onVoicemailDeleteUndo(int adapterPosition) {
+    if (mOnVoicemailDeletedListener != null) {
+      mOnVoicemailDeletedListener.onVoicemailDeleteUndo(mRowId, adapterPosition, mVoicemailUri);
+    }
+  }
+
+  void onVoicemailDeletedInDatabase() {
+    if (mOnVoicemailDeletedListener != null) {
+      mOnVoicemailDeletedListener.onVoicemailDeletedInDatabase(mRowId, mVoicemailUri);
+    }
+  }
+
+  @VisibleForTesting
+  public boolean isPlaying() {
+    return mIsPlaying;
+  }
+
+  @VisibleForTesting
+  public boolean isSpeakerphoneOn() {
+    return mIsSpeakerphoneOn;
+  }
+
+  /**
+   * This method only handles app-level changes to the speakerphone. Audio layer changes should be
+   * handled separately. This is so that the VoicemailAudioManager can trigger changes to the
+   * presenter without the presenter triggering the audio manager and duplicating actions.
+   */
+  public void setSpeakerphoneOn(boolean on) {
+    if (mView == null) {
+      return;
+    }
+
+    mView.onSpeakerphoneOn(on);
+
+    mIsSpeakerphoneOn = on;
+
+    // This should run even if speakerphone is not being toggled because we may be switching
+    // from earpiece to headphone and vise versa. Also upon initial setup the default audio
+    // source is the earpiece, so we want to trigger the proximity sensor.
+    if (mIsPlaying) {
+      if (on || mVoicemailAudioManager.isWiredHeadsetPluggedIn()) {
+        disableProximitySensor(false /* waitForFarState */);
+      } else {
+        enableProximitySensor();
+      }
+    }
+  }
+
+  @VisibleForTesting
+  public void clearInstance() {
+    sInstance = null;
+  }
+
+  /**
+   * Share voicemail to be opened by user selected apps. This method will collect information, copy
+   * voicemail to a temporary file in background and launch a chooser intent to share it.
+   */
+  @TargetApi(VERSION_CODES.M)
+  public void shareVoicemail() {
+    mAsyncTaskExecutor.submit(
+        Tasks.SHARE_VOICEMAIL,
+        new AsyncTask<Void, Void, Uri>() {
+          @Nullable
+          @Override
+          protected Uri doInBackground(Void... params) {
+            ContentResolver contentResolver = mContext.getContentResolver();
+            try (Cursor callLogInfo = getCallLogInfoCursor(contentResolver, mVoicemailUri);
+                Cursor contentInfo = getContentInfoCursor(contentResolver, mVoicemailUri)) {
+
+              if (hasContent(callLogInfo) && hasContent(contentInfo)) {
+                String cachedName = callLogInfo.getString(CallLogQuery.CACHED_NAME);
+                String number =
+                    contentInfo.getString(
+                        contentInfo.getColumnIndex(VoicemailContract.Voicemails.NUMBER));
+                long date =
+                    contentInfo.getLong(
+                        contentInfo.getColumnIndex(VoicemailContract.Voicemails.DATE));
+                String mimeType =
+                    contentInfo.getString(
+                        contentInfo.getColumnIndex(VoicemailContract.Voicemails.MIME_TYPE));
+
+                // Copy voicemail content to a new file.
+                // Please see reference in third_party/java_src/android_app/dialer/java/com/android/
+                // dialer/app/res/xml/file_paths.xml for correct cache directory name.
+                File parentDir = new File(mContext.getCacheDir(), "my_cache");
+                if (!parentDir.exists()) {
+                  parentDir.mkdirs();
+                }
+                File temporaryVoicemailFile =
+                    new File(parentDir, getFileName(cachedName, number, mimeType, date));
+
+                try (InputStream inputStream = contentResolver.openInputStream(mVoicemailUri);
+                    OutputStream outputStream =
+                        contentResolver.openOutputStream(Uri.fromFile(temporaryVoicemailFile))) {
+                  if (inputStream != null && outputStream != null) {
+                    ByteStreams.copy(inputStream, outputStream);
+                    return FileProvider.getUriForFile(
+                        mContext,
+                        Constants.get().getFileProviderAuthority(),
+                        temporaryVoicemailFile);
+                  }
+                } catch (IOException e) {
+                  LogUtil.e(
+                      "VoicemailAsyncTaskUtil.shareVoicemail",
+                      "failed to copy voicemail content to new file: ",
+                      e);
+                }
+                return null;
+              }
+            }
+            return null;
+          }
+
+          @Override
+          protected void onPostExecute(Uri uri) {
+            if (uri == null) {
+              LogUtil.e("VoicemailAsyncTaskUtil.shareVoicemail", "failed to get voicemail");
+            } else {
+              mContext.startActivity(
+                  Intent.createChooser(
+                      getShareIntent(mContext, uri),
+                      mContext.getResources().getText(R.string.call_log_action_share_voicemail)));
+            }
+          }
+        });
+  }
+
+  private static String getFileName(String cachedName, String number, String mimeType, long date) {
+    String callerName = TextUtils.isEmpty(cachedName) ? number : cachedName;
+    SimpleDateFormat simpleDateFormat =
+        new SimpleDateFormat(VOICEMAIL_SHARE_FILE_NAME_DATE_FORMAT, Locale.getDefault());
+
+    String fileExtension = MimeTypeMap.getSingleton().getExtensionFromMimeType(mimeType);
+
+    return callerName
+        + "_"
+        + simpleDateFormat.format(new Date(date))
+        + (TextUtils.isEmpty(fileExtension) ? "" : "." + fileExtension);
+  }
+
+  private static Intent getShareIntent(Context context, Uri voicemailFileUri) {
+    Intent shareIntent = new Intent();
+    shareIntent.setAction(Intent.ACTION_SEND);
+    shareIntent.putExtra(Intent.EXTRA_STREAM, voicemailFileUri);
+    shareIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
+    shareIntent.setType(context.getContentResolver().getType(voicemailFileUri));
+    return shareIntent;
+  }
+
+  private static boolean hasContent(@Nullable Cursor cursor) {
+    return cursor != null && cursor.moveToFirst();
+  }
+
+  @Nullable
+  private static Cursor getCallLogInfoCursor(ContentResolver contentResolver, Uri voicemailUri) {
+    return contentResolver.query(
+        ContentUris.withAppendedId(
+            CallLog.Calls.CONTENT_URI_WITH_VOICEMAIL, ContentUris.parseId(voicemailUri)),
+        CallLogQuery.getProjection(),
+        null,
+        null,
+        null);
+  }
+
+  @Nullable
+  private static Cursor getContentInfoCursor(ContentResolver contentResolver, Uri voicemailUri) {
+    return contentResolver.query(
+        voicemailUri,
+        new String[] {
+          VoicemailContract.Voicemails._ID,
+          VoicemailContract.Voicemails.NUMBER,
+          VoicemailContract.Voicemails.DATE,
+          VoicemailContract.Voicemails.MIME_TYPE,
+        },
+        null,
+        null,
+        null);
+  }
+
+  /** The enumeration of {@link AsyncTask} objects we use in this class. */
+  public enum Tasks {
+    CHECK_FOR_CONTENT,
+    CHECK_CONTENT_AFTER_CHANGE,
+    SHARE_VOICEMAIL,
+    SEND_FETCH_REQUEST
+  }
+
+  /** Contract describing the behaviour we need from the ui we are controlling. */
+  public interface PlaybackView {
+
+    int getDesiredClipPosition();
+
+    void disableUiElements();
+
+    void enableUiElements();
+
+    void onPlaybackError();
+
+    void onPlaybackStarted(int duration, ScheduledExecutorService executorService);
+
+    void onPlaybackStopped();
+
+    void onSpeakerphoneOn(boolean on);
+
+    void setClipPosition(int clipPositionInMillis, int clipLengthInMillis);
+
+    void setSuccess();
+
+    void setFetchContentTimeout();
+
+    void setIsFetchingContent();
+
+    void setPresenter(VoicemailPlaybackPresenter presenter, Uri voicemailUri);
+
+    void resetSeekBar();
+  }
+
+  public interface OnVoicemailDeletedListener {
+
+    void onVoicemailDeleted(CallLogListItemViewHolder viewHolder, Uri uri);
+
+    void onVoicemailDeleteUndo(long rowId, int adaptorPosition, Uri uri);
+
+    void onVoicemailDeletedInDatabase(long rowId, Uri uri);
+  }
+
+  protected interface OnContentCheckedListener {
+
+    void onContentChecked(boolean hasContent);
+  }
+
+  @ThreadSafe
+  private class FetchResultHandler extends ContentObserver implements Runnable {
+
+    private final Handler mFetchResultHandler;
+    private final Uri mVoicemailUri;
+    private AtomicBoolean mIsWaitingForResult = new AtomicBoolean(true);
+
+    public FetchResultHandler(Handler handler, Uri uri, int code) {
+      super(handler);
+      mFetchResultHandler = handler;
+      mVoicemailUri = uri;
+      if (mContext != null) {
+        mContext.getContentResolver().registerContentObserver(mVoicemailUri, false, this);
+        mFetchResultHandler.postDelayed(this, FETCH_CONTENT_TIMEOUT_MS);
+      }
+    }
+
+    /** Stop waiting for content and notify UI if {@link FETCH_CONTENT_TIMEOUT_MS} has elapsed. */
+    @Override
+    public void run() {
+      if (mIsWaitingForResult.getAndSet(false) && mContext != null) {
+        mContext.getContentResolver().unregisterContentObserver(this);
+        if (mView != null) {
+          mView.setFetchContentTimeout();
+        }
+      }
+    }
+
+    public void destroy() {
+      if (mIsWaitingForResult.getAndSet(false) && mContext != null) {
+        mContext.getContentResolver().unregisterContentObserver(this);
+        mFetchResultHandler.removeCallbacks(this);
+      }
+    }
+
+    @Override
+    public void onChange(boolean selfChange) {
+      mAsyncTaskExecutor.submit(
+          Tasks.CHECK_CONTENT_AFTER_CHANGE,
+          new AsyncTask<Void, Void, Boolean>() {
+
+            @Override
+            public Boolean doInBackground(Void... params) {
+              return queryHasContent(mVoicemailUri);
+            }
+
+            @Override
+            public void onPostExecute(Boolean hasContent) {
+              if (hasContent && mContext != null && mIsWaitingForResult.getAndSet(false)) {
+                mContext.getContentResolver().unregisterContentObserver(FetchResultHandler.this);
+                prepareContent();
+              }
+            }
+          });
+    }
+  }
+}