Refactor all voicemail audio handling to new audio manager class.

Since voicemail audio handling is about to get more complicated (adding
head phone switching and bluetooth), we need a separate class to handle
audio.

Bug: 23816959
Change-Id: If891739ef80f5646145d7a44ec70f5b7544010b0

1 files changed, 73 insertions, 0 deletions

diff --git a/src/com/android/dialer/voicemail/VoicemailAudioManager.java b/src/com/android/dialer/voicemail/VoicemailAudioManager.java
new file mode 100644
index 000000000..e64e180b6
--- /dev/null
+++ b/src/com/android/dialer/voicemail/VoicemailAudioManager.java
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2015 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.voicemail;
+
+import android.content.Context;
+import android.media.AudioManager;
+import android.media.AudioManager.OnAudioFocusChangeListener;
+import android.util.Log;
+
+import java.util.concurrent.RejectedExecutionException;
+
+/**
+ * This class manages all audio changes for voicemail playback.
+ */
+final class VoicemailAudioManager implements OnAudioFocusChangeListener {
+    private static final String TAG = VoicemailAudioManager.class.getSimpleName();
+
+    public static final int PLAYBACK_STREAM = AudioManager.STREAM_VOICE_CALL;
+
+    private AudioManager mAudioManager;
+    private VoicemailPlaybackPresenter mVoicemailPlaybackPresenter;
+
+    public VoicemailAudioManager(Context context,
+            VoicemailPlaybackPresenter voicemailPlaybackPresenter) {
+        mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
+        mVoicemailPlaybackPresenter = voicemailPlaybackPresenter;
+    }
+
+    public void requestAudioFocus() {
+        int result = mAudioManager.requestAudioFocus(
+                this,
+                PLAYBACK_STREAM,
+                AudioManager.AUDIOFOCUS_GAIN_TRANSIENT);
+        if (result != AudioManager.AUDIOFOCUS_REQUEST_GRANTED) {
+            throw new RejectedExecutionException("Could not capture audio focus.");
+        }
+    }
+
+    public void abandonAudioFocus() {
+        mAudioManager.abandonAudioFocus(this);
+    }
+
+    @Override
+    public void onAudioFocusChange(int focusChange) {
+        Log.d(TAG, "onAudioFocusChange: focusChange=" + focusChange);
+        mVoicemailPlaybackPresenter.onAudioFocusChange(focusChange == AudioManager.AUDIOFOCUS_GAIN);
+    }
+
+    public void turnOnSpeaker(boolean on) {
+        if (mAudioManager.isSpeakerphoneOn() != on) {
+            Log.i(TAG, "turning speaker phone on: " + on);
+            mAudioManager.setSpeakerphoneOn(on);
+        }
+    }
+
+    public boolean isSpeakerphoneOn() {
+        return mAudioManager.isSpeakerphoneOn();
+    }
+}
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