Add developer menu entry to enable Bluetooth AVDTP delay reports

Bug: 32755225
Test: Manual test with a device that supports delay reporting;
Robolectric tests
Change-Id: I8f121dd7f94bce3a07deb9cb23c698829cbecd96

res/values/strings.xml

@@ -1655,10 +1655,15 @@
     <!-- Bluetooth settings.  Dock Setting Dialog - Remember setting and don't ask user again -->
     <string name="bluetooth_dock_settings_remember">Remember settings</string>
 
+    <!-- Bluetooth developer options. -->
     <!-- Bluetooth developer settings: Maximum number of connected audio devices -->
     <string name="bluetooth_max_connected_audio_devices_string">Maximum connected Bluetooth audio devices</string>
     <!-- Bluetooth developer settings: Maximum number of connected audio devices -->
     <string name="bluetooth_max_connected_audio_devices_dialog_title">Select maximum number of connected Bluetooth audio devices</string>
+    <!-- Bluetooth developer settings: Checkbox title for enabling Bluetooth receiving AVDTP delay reports -->
+    <string name="bluetooth_enable_avdtp_delay_reports">Enable Bluetooth AVDTP delay reports</string>
+    <!-- Bluetooth developer settings: Summary of checkbox for enabling Bluetooth receiving AVDTP delay reports -->
+    <string name="bluetooth_enable_avdtp_delay_reports_summary">Allow receiving Bluetooth AVDTP delay reports</string>
 
     <!-- Wifi Display settings. The title of the screen. [CHAR LIMIT=40] -->
     <string name="wifi_display_settings_title">Cast</string>

res/xml/development_settings.xml

@@ -256,6 +256,11 @@
             android:title="@string/bluetooth_disable_inband_ringing"
             android:summary="@string/bluetooth_disable_inband_ringing_summary" />
 
+        <SwitchPreference
+            android:key="bluetooth_enable_avdtp_delay_reports"
+            android:title="@string/bluetooth_enable_avdtp_delay_reports"
+            android:summary="@string/bluetooth_enable_avdtp_delay_reports_summary"/>
+
         <ListPreference
             android:key="bluetooth_select_avrcp_version"
             android:title="@string/bluetooth_select_avrcp_version_string"

src/com/android/settings/development/BluetoothDelayReportsPreferenceController.java

@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2018 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.development;
+
+import android.content.Context;
+import android.os.SystemProperties;
+import android.support.annotation.VisibleForTesting;
+import android.support.v14.preference.SwitchPreference;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.development.DeveloperOptionsPreferenceController;
+
+public class BluetoothDelayReportsPreferenceController extends
+        DeveloperOptionsPreferenceController implements Preference.OnPreferenceChangeListener,
+        PreferenceControllerMixin {
+
+    private static final String BLUETOOTH_ENABLE_AVDTP_DELAY_REPORT_KEY =
+            "bluetooth_enable_avdtp_delay_reports";
+    @VisibleForTesting
+    static final String BLUETOOTH_ENABLE_AVDTP_DELAY_REPORTS_PROPERTY =
+            "persist.bluetooth.enabledelayreports";
+
+    private SwitchPreference mPreference;
+
+    public BluetoothDelayReportsPreferenceController(Context context) {
+        super(context);
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return BLUETOOTH_ENABLE_AVDTP_DELAY_REPORT_KEY;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+
+        mPreference = (SwitchPreference) screen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        final boolean isEnabled = (Boolean) newValue;
+        SystemProperties.set(BLUETOOTH_ENABLE_AVDTP_DELAY_REPORTS_PROPERTY,
+                isEnabled ? "true" : "false");
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        final boolean isEnabled = SystemProperties.getBoolean(
+                BLUETOOTH_ENABLE_AVDTP_DELAY_REPORTS_PROPERTY, false /* default */);
+        mPreference.setChecked(isEnabled);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchEnabled() {
+        mPreference.setEnabled(true);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchDisabled() {
+        mPreference.setEnabled(false);
+        // the default setting for this preference is the disabled state
+        mPreference.setChecked(false);
+        SystemProperties.set(BLUETOOTH_ENABLE_AVDTP_DELAY_REPORTS_PROPERTY, "false");
+    }
+
+}

src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java

@@ -404,6 +404,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         controllers.add(new BluetoothDeviceNoNamePreferenceController(context));
         controllers.add(new BluetoothAbsoluteVolumePreferenceController(context));
         controllers.add(new BluetoothInbandRingingPreferenceController(context));
+        controllers.add(new BluetoothDelayReportsPreferenceController(context));
         controllers.add(new BluetoothAvrcpVersionPreferenceController(context));
         controllers.add(new BluetoothAudioCodecPreferenceController(context, lifecycle,
                 bluetoothA2dpConfigStore));

tests/robotests/src/com/android/settings/development/BluetoothDelayReportsPreferenceControllerTest.java

@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2018 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.development;
+
+
+import static com.android.settings.development.BluetoothDelayReportsPreferenceController
+        .BLUETOOTH_ENABLE_AVDTP_DELAY_REPORTS_PROPERTY;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.support.v14.preference.SwitchPreference;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+import com.android.settings.testutils.shadow.SettingsShadowSystemProperties;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH,
+        sdk = TestConfig.SDK_VERSION,
+        shadows = {SettingsShadowSystemProperties.class})
+public class BluetoothDelayReportsPreferenceControllerTest {
+
+    @Mock
+    private PreferenceScreen mPreferenceScreen;
+
+    private Context mContext;
+    private SwitchPreference mPreference;
+    private BluetoothDelayReportsPreferenceController mController;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mContext = RuntimeEnvironment.application;
+        mPreference = new SwitchPreference(mContext);
+        mController = spy(new BluetoothDelayReportsPreferenceController(mContext));
+        when(mPreferenceScreen.findPreference(mController.getPreferenceKey())).thenReturn(
+                mPreference);
+        mController.displayPreference(mPreferenceScreen);
+    }
+
+    @Test
+    public void onPreferenceChanged_settingEnabled_turnOnDelayReports() {
+        mController.onPreferenceChange(mPreference, true /* new value */);
+
+        final boolean mode = SettingsShadowSystemProperties.getBoolean(
+                BLUETOOTH_ENABLE_AVDTP_DELAY_REPORTS_PROPERTY, false /* default */);
+
+        assertThat(mode).isTrue();
+    }
+
+    @Test
+    public void onPreferenceChanged_settingDisabled_turnOffDelayReports() {
+        mController.onPreferenceChange(mPreference, false /* new value */);
+
+        final boolean mode = SettingsShadowSystemProperties.getBoolean(
+                BLUETOOTH_ENABLE_AVDTP_DELAY_REPORTS_PROPERTY, false /* default */);
+
+        assertThat(mode).isFalse();
+    }
+
+    @Test
+    public void updateState_settingEnabled_preferenceShouldBeChecked() {
+        SettingsShadowSystemProperties.set(BLUETOOTH_ENABLE_AVDTP_DELAY_REPORTS_PROPERTY,
+                Boolean.toString(true));
+        mController.updateState(mPreference);
+
+        assertThat(mPreference.isChecked()).isTrue();
+    }
+
+    @Test
+    public void updateState_settingDisabled_preferenceShouldNotBeChecked() {
+        SettingsShadowSystemProperties.set(BLUETOOTH_ENABLE_AVDTP_DELAY_REPORTS_PROPERTY,
+                Boolean.toString(false));
+        mController.updateState(mPreference);
+
+        assertThat(mPreference.isChecked()).isFalse();
+    }
+
+    @Test
+    public void onDeveloperOptionsDisabled_shouldDisablePreference() {
+        mController.onDeveloperOptionsDisabled();
+
+        final boolean mode = SettingsShadowSystemProperties.getBoolean(
+                BLUETOOTH_ENABLE_AVDTP_DELAY_REPORTS_PROPERTY, false /* default */);
+
+        assertThat(mode).isFalse();
+        assertThat(mPreference.isEnabled()).isFalse();
+        assertThat(mPreference.isChecked()).isFalse();
+    }
+
+    @Test
+    public void onDeveloperOptionsEnabled_shouldEnablePreference() {
+        mController.onDeveloperOptionsEnabled();
+
+        final boolean mode = SettingsShadowSystemProperties.getBoolean(
+                BLUETOOTH_ENABLE_AVDTP_DELAY_REPORTS_PROPERTY, false /* default */);
+
+        assertThat(mode).isFalse();
+        assertThat(mPreference.isEnabled()).isTrue();
+        assertThat(mPreference.isChecked()).isFalse();
+    }
+}