Fix IllegalArgumentException in AudioHelper

Audio streams for phone calls in BT device (STREAM_VOICE_CALL) is not
supported in AudioManager.getStreamMinVolume(), fallback to use
STREAM_VOICE_CALL

Fixes: 133812547
Test: make RunSettingsRoboTests
Change-Id: I8e330f60bae2a7cf9cd0cf7288076b8320ccc504

src/com/android/settings/notification/AudioHelper.java

@@ -22,6 +22,7 @@ import android.media.AudioManager;
 import android.media.AudioSystem;
 import android.os.UserHandle;
 import android.os.UserManager;
+import android.util.Log;
 
 import com.android.settings.Utils;
 
@@ -30,6 +31,7 @@ import com.android.settings.Utils;
  */
 public class AudioHelper {
 
+    private static final String TAG = "AudioHelper";
     private Context mContext;
     private AudioManager mAudioManager;
 
@@ -76,6 +78,15 @@ public class AudioHelper {
     }
 
     public int getMinVolume(int stream) {
-        return mAudioManager.getStreamMinVolume(stream);
+        int minVolume;
+        try {
+            minVolume = mAudioManager.getStreamMinVolume(stream);
+        } catch (IllegalArgumentException e) {
+            Log.w(TAG, "Invalid stream type " + stream);
+            // Fallback to STREAM_VOICE_CALL because CallVolumePreferenceController.java default
+            // return STREAM_VOICE_CALL in getAudioStream
+            minVolume = mAudioManager.getStreamMinVolume(AudioManager.STREAM_VOICE_CALL);
+        }
+        return minVolume;
     }
 }

tests/robotests/src/com/android/settings/notification/AudioHelperTest.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2019 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.settings.notification;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.content.Context;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+
+@RunWith(RobolectricTestRunner.class)
+public class AudioHelperTest {
+
+    private static final int START = -10;
+    private static final int END = 10;
+    private static final int DEFAULT = -100;
+
+    private Context mContext;
+    private AudioHelper mAudioHelper;
+
+    @Before
+    public void setUp() {
+        mContext = RuntimeEnvironment.application;
+        mAudioHelper = new AudioHelper(mContext);
+    }
+
+    @Test
+    public void getMaxVolume_anyStreamType_getValue() {
+        int volume = DEFAULT;
+
+        for (int i = START; i < END; i++) {
+            volume = mAudioHelper.getMaxVolume(i);
+            assertThat(volume).isNotEqualTo(DEFAULT);
+        }
+    }
+
+    @Test
+    public void getMinVolume_anyStreamType_getValue() {
+        int volume = DEFAULT;
+
+        for (int i = START; i < END; i++) {
+            volume = mAudioHelper.getMinVolume(i);
+            assertThat(volume).isNotEqualTo(DEFAULT);
+        }
+    }
+}