Add an option to disable proximity sensor to AppRTC Demo Android.

BUG=webrtc:6152
R=magjed@webrtc.org

Review URL: https://codereview.webrtc.org/2194613003 .

Cr-Commit-Position: refs/heads/master@{#13573}

webrtc/examples/androidapp/res/values/arrays.xml

@@ -36,6 +36,18 @@
         <item>ISAC</item>
     </string-array>
 
+    <string-array name="speakerphone">
+        <item>Auto (proximity sensor)</item>
+        <item>Enabled</item>
+        <item>Disabled</item>
+    </string-array>
+
+    <string-array name="speakerphoneValues">
+        <item>auto</item>
+        <item>true</item>
+        <item>false</item>
+    </string-array>
+
     <string-array name="roomListContextMenu">
         <item>Remove favorite</item>
     </string-array>

webrtc/examples/androidapp/res/values/strings.xml

@@ -142,6 +142,11 @@
     <string name="pref_enable_level_control_title">Enable level control.</string>
     <string name="pref_enable_level_control_default">false</string>
 
+    <string name="pref_speakerphone_key">speakerphone_preference</string>
+    <string name="pref_speakerphone_title">Speakerphone.</string>
+    <string name="pref_speakerphone_dlg">Speakerphone.</string>
+    <string name="pref_speakerphone_default">auto</string>
+
     <string name="pref_miscsettings_key">misc_settings_key</string>
     <string name="pref_miscsettings_title">Miscellaneous settings.</string>
 

webrtc/examples/androidapp/res/xml/preferences.xml

@@ -140,6 +140,14 @@
             android:key="@string/pref_enable_level_control_key"
             android:title="@string/pref_enable_level_control_title"
             android:defaultValue="@string/pref_enable_level_control_default" />
+
+        <ListPreference
+            android:key="@string/pref_speakerphone_key"
+            android:title="@string/pref_speakerphone_title"
+            android:defaultValue="@string/pref_speakerphone_default"
+            android:dialogTitle="@string/pref_speakerphone_dlg"
+            android:entries="@array/speakerphone"
+            android:entryValues="@array/speakerphoneValues" />
     </PreferenceCategory>
 
     <PreferenceCategory

webrtc/examples/androidapp/src/org/appspot/apprtc/AppRTCAudioManager.java

@@ -16,8 +16,10 @@ import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
+import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
 import android.media.AudioManager;
+import android.preference.PreferenceManager;
 import android.util.Log;
 
 import java.util.Collections;
@@ -29,6 +31,9 @@ import java.util.Set;
  */
 public class AppRTCAudioManager {
   private static final String TAG = "AppRTCAudioManager";
+  private static final String SPEAKERPHONE_AUTO = "auto";
+  private static final String SPEAKERPHONE_TRUE = "true";
+  private static final String SPEAKERPHONE_FALSE = "false";
 
   /**
    * AudioDevice is the names of possible audio devices that we currently
@@ -49,11 +54,10 @@ public class AppRTCAudioManager {
   private boolean savedIsSpeakerPhoneOn = false;
   private boolean savedIsMicrophoneMute = false;
 
-  // For now; always use the speaker phone as default device selection when
+  private final AudioDevice defaultAudioDevice;
-  // there is a choice between SPEAKER_PHONE and EARPIECE.
+
-  // TODO(henrika): it is possible that EARPIECE should be preferred in some
+  // Contains speakerphone setting: auto, true or false
-  // cases. If so, we should set this value at construction instead.
+  private final String useSpeakerphone;
-  private final AudioDevice defaultAudioDevice = AudioDevice.SPEAKER_PHONE;
 
   // Proximity sensor object. It measures the proximity of an object in cm
   // relative to the view screen of a device and can therefore be used to
@@ -74,6 +78,10 @@ public class AppRTCAudioManager {
   // This method is called when the proximity sensor reports a state change,
   // e.g. from "NEAR to FAR" or from "FAR to NEAR".
   private void onProximitySensorChangedState() {
+    if (!useSpeakerphone.equals(SPEAKERPHONE_AUTO)) {
+      return;
+    }
+
     // The proximity sensor should only be activated when there are exactly two
     // available audio devices.
     if (audioDevices.size() == 2
@@ -105,6 +113,16 @@ public class AppRTCAudioManager {
     audioManager = ((AudioManager) context.getSystemService(
         Context.AUDIO_SERVICE));
 
+    SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
+    useSpeakerphone = sharedPreferences.getString(context.getString(R.string.pref_speakerphone_key),
+        context.getString(R.string.pref_speakerphone_default));
+
+    if (useSpeakerphone.equals(SPEAKERPHONE_FALSE)) {
+      defaultAudioDevice = AudioDevice.EARPIECE;
+    } else {
+      defaultAudioDevice = AudioDevice.SPEAKER_PHONE;
+    }
+
     // Create and initialize the proximity sensor.
     // Tablet devices (e.g. Nexus 7) does not support proximity sensors.
     // Note that, the sensor will not be active until start() has been called.

webrtc/examples/androidapp/src/org/appspot/apprtc/SettingsActivity.java

@@ -47,6 +47,7 @@ public class SettingsActivity extends Activity
   private String keyprefDisableBuiltInAGC;
   private String keyprefDisableBuiltInNS;
   private String keyprefEnableLevelControl;
+  private String keyprefSpeakerphone;
 
   private String keyPrefRoomServerUrl;
   private String keyPrefDisplayHud;
@@ -76,6 +77,7 @@ public class SettingsActivity extends Activity
     keyprefDisableBuiltInAGC = getString(R.string.pref_disable_built_in_agc_key);
     keyprefDisableBuiltInNS = getString(R.string.pref_disable_built_in_ns_key);
     keyprefEnableLevelControl = getString(R.string.pref_enable_level_control_key);
+    keyprefSpeakerphone = getString(R.string.pref_speakerphone_key);
 
     keyPrefRoomServerUrl = getString(R.string.pref_room_server_url_key);
     keyPrefDisplayHud = getString(R.string.pref_displayhud_key);
@@ -118,6 +120,7 @@ public class SettingsActivity extends Activity
     updateSummaryB(sharedPreferences, keyprefDisableBuiltInAGC);
     updateSummaryB(sharedPreferences, keyprefDisableBuiltInNS);
     updateSummaryB(sharedPreferences, keyprefEnableLevelControl);
+    updateSummaryList(sharedPreferences, keyprefSpeakerphone);
 
     updateSummary(sharedPreferences, keyPrefRoomServerUrl);
     updateSummaryB(sharedPreferences, keyPrefDisplayHud);
@@ -198,6 +201,8 @@ public class SettingsActivity extends Activity
         || key.equals(keyprefEnableLevelControl)
         || key.equals(keyPrefDisplayHud)) {
       updateSummaryB(sharedPreferences, key);
+    } else if (key.equals(keyprefSpeakerphone)) {
+      updateSummaryList(sharedPreferences, key);
     }
     if (key.equals(keyprefStartVideoBitrateType)) {
       setVideoBitrateEnable(sharedPreferences);
@@ -226,6 +231,11 @@ public class SettingsActivity extends Activity
         : getString(R.string.pref_value_disabled));
   }
 
+  private void updateSummaryList(SharedPreferences sharedPreferences, String key) {
+    ListPreference updatedPref = (ListPreference) settingsFragment.findPreference(key);
+    updatedPref.setSummary(updatedPref.getEntry());
+  }
+
   private void setVideoBitrateEnable(SharedPreferences sharedPreferences) {
     Preference bitratePreferenceValue =
         settingsFragment.findPreference(keyprefStartVideoBitrateValue);