src/com/android/settings/bluetooth/BluetoothDeviceDetailsFragment.java - platform/packages/apps/Settings - Git at Google

 /*
  * Copyright (C) 2017 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.bluetooth;

 import static android.bluetooth.BluetoothDevice.BOND_NONE;
 import static android.os.UserManager.DISALLOW_CONFIG_BLUETOOTH;

 import android.app.settings.SettingsEnums;
 import android.bluetooth.BluetoothDevice;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.hardware.input.InputManager;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.UserManager;
 import android.provider.DeviceConfig;
 import android.text.TextUtils;
 import android.util.FeatureFlagUtils;
 import android.util.Log;
 import android.view.InputDevice;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.ViewTreeObserver;

 import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;

 import com.android.settings.R;
 import com.android.settings.connecteddevice.stylus.StylusDevicesController;
 import com.android.settings.core.SettingsUIDeviceConfig;
 import com.android.settings.dashboard.RestrictedDashboardFragment;
 import com.android.settings.inputmethod.KeyboardSettingsPreferenceController;
 import com.android.settings.overlay.FeatureFactory;
 import com.android.settings.slices.SlicePreferenceController;
 import com.android.settingslib.bluetooth.CachedBluetoothDevice;
 import com.android.settingslib.bluetooth.LocalBluetoothManager;
 import com.android.settingslib.core.AbstractPreferenceController;
 import com.android.settingslib.core.lifecycle.Lifecycle;

 import java.util.ArrayList;
 import java.util.List;

 public class BluetoothDeviceDetailsFragment extends RestrictedDashboardFragment {
     public static final String KEY_DEVICE_ADDRESS = "device_address";
     private static final String TAG = "BTDeviceDetailsFrg";

     @VisibleForTesting
     static int EDIT_DEVICE_NAME_ITEM_ID = Menu.FIRST;

     /**
      * An interface to let tests override the normal mechanism for looking up the
      * CachedBluetoothDevice and LocalBluetoothManager, and substitute their own mocks instead.
      * This is only needed in situations where you instantiate the fragment indirectly (eg via an
      * intent) and can't use something like spying on an instance you construct directly via
      * newInstance.
      */
     @VisibleForTesting
     interface TestDataFactory {
         CachedBluetoothDevice getDevice(String deviceAddress);

         LocalBluetoothManager getManager(Context context);

         UserManager getUserManager();
     }

     @VisibleForTesting
     static TestDataFactory sTestDataFactory;

     @VisibleForTesting
     String mDeviceAddress;
     @VisibleForTesting
     LocalBluetoothManager mManager;
     @VisibleForTesting
     CachedBluetoothDevice mCachedDevice;

     @Nullable
     InputDevice mInputDevice;

     private UserManager mUserManager;

     public BluetoothDeviceDetailsFragment() {
         super(DISALLOW_CONFIG_BLUETOOTH);
     }

     @VisibleForTesting
     LocalBluetoothManager getLocalBluetoothManager(Context context) {
         if (sTestDataFactory != null) {
             return sTestDataFactory.getManager(context);
         }
         return Utils.getLocalBtManager(context);
     }

     @VisibleForTesting
     CachedBluetoothDevice getCachedDevice(String deviceAddress) {
         if (sTestDataFactory != null) {
             return sTestDataFactory.getDevice(deviceAddress);
         }
         BluetoothDevice remoteDevice =
                 mManager.getBluetoothAdapter().getRemoteDevice(deviceAddress);
         return mManager.getCachedDeviceManager().findDevice(remoteDevice);
     }

     @VisibleForTesting
     UserManager getUserManager() {
         if (sTestDataFactory != null) {
             return sTestDataFactory.getUserManager();
         }

         return getSystemService(UserManager.class);
     }

     @Nullable
     @VisibleForTesting
     InputDevice getInputDevice(Context context) {
         InputManager im = context.getSystemService(InputManager.class);

         for (int deviceId : im.getInputDeviceIds()) {
             String btAddress = im.getInputDeviceBluetoothAddress(deviceId);

             if (btAddress != null && btAddress.equals(mDeviceAddress)) {
                 return im.getInputDevice(deviceId);
             }
         }
         return null;
     }

     public static BluetoothDeviceDetailsFragment newInstance(String deviceAddress) {
         Bundle args = new Bundle(1);
         args.putString(KEY_DEVICE_ADDRESS, deviceAddress);
         BluetoothDeviceDetailsFragment fragment = new BluetoothDeviceDetailsFragment();
         fragment.setArguments(args);
         return fragment;
     }

     @Override
     public void onAttach(Context context) {
         mDeviceAddress = getArguments().getString(KEY_DEVICE_ADDRESS);
         mManager = getLocalBluetoothManager(context);
         mCachedDevice = getCachedDevice(mDeviceAddress);
         mUserManager = getUserManager();

         if (FeatureFlagUtils.isEnabled(context,
                 FeatureFlagUtils.SETTINGS_SHOW_STYLUS_PREFERENCES)) {
             mInputDevice = getInputDevice(context);
         }

         super.onAttach(context);
         if (mCachedDevice == null) {
             // Close this page if device is null with invalid device mac address
             Log.w(TAG, "onAttach() CachedDevice is null!");
             finish();
             return;
         }
         use(AdvancedBluetoothDetailsHeaderController.class).init(mCachedDevice);
         use(LeAudioBluetoothDetailsHeaderController.class).init(mCachedDevice, mManager);
         use(KeyboardSettingsPreferenceController.class).init(mCachedDevice);

         final BluetoothFeatureProvider featureProvider =
                 FeatureFactory.getFeatureFactory().getBluetoothFeatureProvider();
         final boolean sliceEnabled = DeviceConfig.getBoolean(DeviceConfig.NAMESPACE_SETTINGS_UI,
                 SettingsUIDeviceConfig.BT_SLICE_SETTINGS_ENABLED, true);

         use(BlockingPrefWithSliceController.class).setSliceUri(sliceEnabled
                 ? featureProvider.getBluetoothDeviceSettingsUri(mCachedDevice.getDevice())
                 : null);
     }

     private void updateExtraControlUri(int viewWidth) {
         BluetoothFeatureProvider featureProvider =
                 FeatureFactory.getFeatureFactory().getBluetoothFeatureProvider();
         boolean sliceEnabled = DeviceConfig.getBoolean(DeviceConfig.NAMESPACE_SETTINGS_UI,
                 SettingsUIDeviceConfig.BT_SLICE_SETTINGS_ENABLED, true);
         Uri controlUri = null;
         String uri = featureProvider.getBluetoothDeviceControlUri(mCachedDevice.getDevice());
         if (!TextUtils.isEmpty(uri)) {
             try {
                 controlUri = Uri.parse(uri + viewWidth);
             } catch (NullPointerException exception) {
                 Log.d(TAG, "unable to parse uri");
                 controlUri = null;
             }
         }
         final SlicePreferenceController slicePreferenceController = use(
                 SlicePreferenceController.class);
         slicePreferenceController.setSliceUri(sliceEnabled ? controlUri : null);
         slicePreferenceController.onStart();
         slicePreferenceController.displayPreference(getPreferenceScreen());
     }

     private final ViewTreeObserver.OnGlobalLayoutListener mOnGlobalLayoutListener =
             new ViewTreeObserver.OnGlobalLayoutListener() {
                 @Override
                 public void onGlobalLayout() {
                     View view = getView();
                     if (view == null) {
                         return;
                     }
                     if (view.getWidth() <= 0) {
                         return;
                     }
                     updateExtraControlUri(view.getWidth() - getPaddingSize());
                     view.getViewTreeObserver().removeOnGlobalLayoutListener(
                             mOnGlobalLayoutListener);
                 }
             };

     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setTitleForInputDevice();
     }

     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
             Bundle savedInstanceState) {
         View view = super.onCreateView(inflater, container, savedInstanceState);
         if (view != null) {
             view.getViewTreeObserver().addOnGlobalLayoutListener(mOnGlobalLayoutListener);
         }
         return view;
     }

     @Override
     public void onResume() {
         super.onResume();
         finishFragmentIfNecessary();
     }

     @VisibleForTesting
     void finishFragmentIfNecessary() {
         if (mCachedDevice.getBondState() == BOND_NONE) {
             finish();
             return;
         }
     }

     @Override
     public int getMetricsCategory() {
         return SettingsEnums.BLUETOOTH_DEVICE_DETAILS;
     }

     @Override
     protected String getLogTag() {
         return TAG;
     }

     @Override
     protected int getPreferenceScreenResId() {
         return R.xml.bluetooth_device_details_fragment;
     }

     @Override
     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
         if (!mUserManager.isGuestUser()) {
             MenuItem item = menu.add(0, EDIT_DEVICE_NAME_ITEM_ID, 0,
                     R.string.bluetooth_rename_button);
             item.setIcon(com.android.internal.R.drawable.ic_mode_edit);
             item.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
         }
         super.onCreateOptionsMenu(menu, inflater);
     }

     @Override
     public boolean onOptionsItemSelected(MenuItem menuItem) {
         if (menuItem.getItemId() == EDIT_DEVICE_NAME_ITEM_ID) {
             RemoteDeviceNameDialogFragment.newInstance(mCachedDevice).show(
                     getFragmentManager(), RemoteDeviceNameDialogFragment.TAG);
             return true;
         }
         return super.onOptionsItemSelected(menuItem);
     }

     @Override
     protected List<AbstractPreferenceController> createPreferenceControllers(Context context) {
         ArrayList<AbstractPreferenceController> controllers = new ArrayList<>();

         if (mCachedDevice != null) {
             Lifecycle lifecycle = getSettingsLifecycle();
             controllers.add(new BluetoothDetailsHeaderController(context, this, mCachedDevice,
                     lifecycle));
             controllers.add(new BluetoothDetailsButtonsController(context, this, mCachedDevice,
                     lifecycle));
             controllers.add(new BluetoothDetailsCompanionAppsController(context, this,
                     mCachedDevice, lifecycle));
             controllers.add(new BluetoothDetailsAudioDeviceTypeController(context, this, mManager,
                     mCachedDevice, lifecycle));
             controllers.add(new BluetoothDetailsSpatialAudioController(context, this, mCachedDevice,
                     lifecycle));
             controllers.add(new BluetoothDetailsProfilesController(context, this, mManager,
                     mCachedDevice, lifecycle));
             controllers.add(new BluetoothDetailsMacAddressController(context, this, mCachedDevice,
                     lifecycle));
             controllers.add(new StylusDevicesController(context, mInputDevice, mCachedDevice,
                     lifecycle));
             controllers.add(new BluetoothDetailsRelatedToolsController(context, this, mCachedDevice,
                     lifecycle));
             controllers.add(new BluetoothDetailsPairOtherController(context, this, mCachedDevice,
                     lifecycle));
             controllers.add(new BluetoothDetailsHearingDeviceControlsController(context, this,
                     mCachedDevice, lifecycle));
         }
         return controllers;
     }

     private int getPaddingSize() {
         TypedArray resolvedAttributes =
                 getContext().obtainStyledAttributes(
                         new int[]{
                                 android.R.attr.listPreferredItemPaddingStart,
                                 android.R.attr.listPreferredItemPaddingEnd
                         });
         int width = resolvedAttributes.getDimensionPixelSize(0, 0)
                 + resolvedAttributes.getDimensionPixelSize(1, 0);
         resolvedAttributes.recycle();
         return width;
     }

     @VisibleForTesting
     void setTitleForInputDevice() {
         if (StylusDevicesController.isDeviceStylus(mInputDevice, mCachedDevice)) {
             // This will override the default R.string.device_details_title "Device Details"
             // that will show on non-stylus bluetooth devices.
             // That title is set via the manifest and also from BluetoothDeviceUpdater.
             getActivity().setTitle(getContext().getString(R.string.stylus_device_details_title));
         }
     }
 }
	/*
	* Copyright (C) 2017 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.bluetooth;

	import static android.bluetooth.BluetoothDevice.BOND_NONE;
	import static android.os.UserManager.DISALLOW_CONFIG_BLUETOOTH;

	import android.app.settings.SettingsEnums;
	import android.bluetooth.BluetoothDevice;
	import android.content.Context;
	import android.content.res.TypedArray;
	import android.hardware.input.InputManager;
	import android.net.Uri;
	import android.os.Bundle;
	import android.os.UserManager;
	import android.provider.DeviceConfig;
	import android.text.TextUtils;
	import android.util.FeatureFlagUtils;
	import android.util.Log;
	import android.view.InputDevice;
	import android.view.LayoutInflater;
	import android.view.Menu;
	import android.view.MenuInflater;
	import android.view.MenuItem;
	import android.view.View;
	import android.view.ViewGroup;
	import android.view.ViewTreeObserver;

	import androidx.annotation.Nullable;
	import androidx.annotation.VisibleForTesting;

	import com.android.settings.R;
	import com.android.settings.connecteddevice.stylus.StylusDevicesController;
	import com.android.settings.core.SettingsUIDeviceConfig;
	import com.android.settings.dashboard.RestrictedDashboardFragment;
	import com.android.settings.inputmethod.KeyboardSettingsPreferenceController;
	import com.android.settings.overlay.FeatureFactory;
	import com.android.settings.slices.SlicePreferenceController;
	import com.android.settingslib.bluetooth.CachedBluetoothDevice;
	import com.android.settingslib.bluetooth.LocalBluetoothManager;
	import com.android.settingslib.core.AbstractPreferenceController;
	import com.android.settingslib.core.lifecycle.Lifecycle;

	import java.util.ArrayList;
	import java.util.List;

	public class BluetoothDeviceDetailsFragment extends RestrictedDashboardFragment {
	public static final String KEY_DEVICE_ADDRESS = "device_address";
	private static final String TAG = "BTDeviceDetailsFrg";

	@VisibleForTesting
	static int EDIT_DEVICE_NAME_ITEM_ID = Menu.FIRST;

	/**
	* An interface to let tests override the normal mechanism for looking up the
	* CachedBluetoothDevice and LocalBluetoothManager, and substitute their own mocks instead.
	* This is only needed in situations where you instantiate the fragment indirectly (eg via an
	* intent) and can't use something like spying on an instance you construct directly via
	* newInstance.
	*/
	@VisibleForTesting
	interface TestDataFactory {
	CachedBluetoothDevice getDevice(String deviceAddress);

	LocalBluetoothManager getManager(Context context);

	UserManager getUserManager();
	}

	@VisibleForTesting
	static TestDataFactory sTestDataFactory;

	@VisibleForTesting
	String mDeviceAddress;
	@VisibleForTesting
	LocalBluetoothManager mManager;
	@VisibleForTesting
	CachedBluetoothDevice mCachedDevice;

	@Nullable
	InputDevice mInputDevice;

	private UserManager mUserManager;

	public BluetoothDeviceDetailsFragment() {
	super(DISALLOW_CONFIG_BLUETOOTH);
	}

	@VisibleForTesting
	LocalBluetoothManager getLocalBluetoothManager(Context context) {
	if (sTestDataFactory != null) {
	return sTestDataFactory.getManager(context);
	}
	return Utils.getLocalBtManager(context);
	}

	@VisibleForTesting
	CachedBluetoothDevice getCachedDevice(String deviceAddress) {
	if (sTestDataFactory != null) {
	return sTestDataFactory.getDevice(deviceAddress);
	}
	BluetoothDevice remoteDevice =
	mManager.getBluetoothAdapter().getRemoteDevice(deviceAddress);
	return mManager.getCachedDeviceManager().findDevice(remoteDevice);
	}

	@VisibleForTesting
	UserManager getUserManager() {
	if (sTestDataFactory != null) {
	return sTestDataFactory.getUserManager();
	}

	return getSystemService(UserManager.class);
	}

	@Nullable
	@VisibleForTesting
	InputDevice getInputDevice(Context context) {
	InputManager im = context.getSystemService(InputManager.class);

	for (int deviceId : im.getInputDeviceIds()) {
	String btAddress = im.getInputDeviceBluetoothAddress(deviceId);

	if (btAddress != null && btAddress.equals(mDeviceAddress)) {
	return im.getInputDevice(deviceId);
	}
	}
	return null;
	}

	public static BluetoothDeviceDetailsFragment newInstance(String deviceAddress) {
	Bundle args = new Bundle(1);
	args.putString(KEY_DEVICE_ADDRESS, deviceAddress);
	BluetoothDeviceDetailsFragment fragment = new BluetoothDeviceDetailsFragment();
	fragment.setArguments(args);
	return fragment;
	}

	@Override
	public void onAttach(Context context) {
	mDeviceAddress = getArguments().getString(KEY_DEVICE_ADDRESS);
	mManager = getLocalBluetoothManager(context);
	mCachedDevice = getCachedDevice(mDeviceAddress);
	mUserManager = getUserManager();

	if (FeatureFlagUtils.isEnabled(context,
	FeatureFlagUtils.SETTINGS_SHOW_STYLUS_PREFERENCES)) {
	mInputDevice = getInputDevice(context);
	}

	super.onAttach(context);
	if (mCachedDevice == null) {
	// Close this page if device is null with invalid device mac address
	Log.w(TAG, "onAttach() CachedDevice is null!");
	finish();
	return;
	}
	use(AdvancedBluetoothDetailsHeaderController.class).init(mCachedDevice);
	use(LeAudioBluetoothDetailsHeaderController.class).init(mCachedDevice, mManager);
	use(KeyboardSettingsPreferenceController.class).init(mCachedDevice);

	final BluetoothFeatureProvider featureProvider =
	FeatureFactory.getFeatureFactory().getBluetoothFeatureProvider();
	final boolean sliceEnabled = DeviceConfig.getBoolean(DeviceConfig.NAMESPACE_SETTINGS_UI,
	SettingsUIDeviceConfig.BT_SLICE_SETTINGS_ENABLED, true);

	use(BlockingPrefWithSliceController.class).setSliceUri(sliceEnabled
	? featureProvider.getBluetoothDeviceSettingsUri(mCachedDevice.getDevice())
	: null);
	}

	private void updateExtraControlUri(int viewWidth) {
	BluetoothFeatureProvider featureProvider =
	FeatureFactory.getFeatureFactory().getBluetoothFeatureProvider();
	boolean sliceEnabled = DeviceConfig.getBoolean(DeviceConfig.NAMESPACE_SETTINGS_UI,
	SettingsUIDeviceConfig.BT_SLICE_SETTINGS_ENABLED, true);
	Uri controlUri = null;
	String uri = featureProvider.getBluetoothDeviceControlUri(mCachedDevice.getDevice());
	if (!TextUtils.isEmpty(uri)) {
	try {
	controlUri = Uri.parse(uri + viewWidth);
	} catch (NullPointerException exception) {
	Log.d(TAG, "unable to parse uri");
	controlUri = null;
	}
	}
	final SlicePreferenceController slicePreferenceController = use(
	SlicePreferenceController.class);
	slicePreferenceController.setSliceUri(sliceEnabled ? controlUri : null);
	slicePreferenceController.onStart();
	slicePreferenceController.displayPreference(getPreferenceScreen());
	}

	private final ViewTreeObserver.OnGlobalLayoutListener mOnGlobalLayoutListener =
	new ViewTreeObserver.OnGlobalLayoutListener() {
	@Override
	public void onGlobalLayout() {
	View view = getView();
	if (view == null) {
	return;
	}
	if (view.getWidth() <= 0) {
	return;
	}
	updateExtraControlUri(view.getWidth() - getPaddingSize());
	view.getViewTreeObserver().removeOnGlobalLayoutListener(
	mOnGlobalLayoutListener);
	}
	};

	@Override
	public void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	setTitleForInputDevice();
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
	Bundle savedInstanceState) {
	View view = super.onCreateView(inflater, container, savedInstanceState);
	if (view != null) {
	view.getViewTreeObserver().addOnGlobalLayoutListener(mOnGlobalLayoutListener);
	}
	return view;
	}

	@Override
	public void onResume() {
	super.onResume();
	finishFragmentIfNecessary();
	}

	@VisibleForTesting
	void finishFragmentIfNecessary() {
	if (mCachedDevice.getBondState() == BOND_NONE) {
	finish();
	return;
	}
	}

	@Override
	public int getMetricsCategory() {
	return SettingsEnums.BLUETOOTH_DEVICE_DETAILS;
	}

	@Override
	protected String getLogTag() {
	return TAG;
	}

	@Override
	protected int getPreferenceScreenResId() {
	return R.xml.bluetooth_device_details_fragment;
	}

	@Override
	public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
	if (!mUserManager.isGuestUser()) {
	MenuItem item = menu.add(0, EDIT_DEVICE_NAME_ITEM_ID, 0,
	R.string.bluetooth_rename_button);
	item.setIcon(com.android.internal.R.drawable.ic_mode_edit);
	item.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
	}
	super.onCreateOptionsMenu(menu, inflater);
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem menuItem) {
	if (menuItem.getItemId() == EDIT_DEVICE_NAME_ITEM_ID) {
	RemoteDeviceNameDialogFragment.newInstance(mCachedDevice).show(
	getFragmentManager(), RemoteDeviceNameDialogFragment.TAG);
	return true;
	}
	return super.onOptionsItemSelected(menuItem);
	}

	@Override
	protected List<AbstractPreferenceController> createPreferenceControllers(Context context) {
	ArrayList<AbstractPreferenceController> controllers = new ArrayList<>();

	if (mCachedDevice != null) {
	Lifecycle lifecycle = getSettingsLifecycle();
	controllers.add(new BluetoothDetailsHeaderController(context, this, mCachedDevice,
	lifecycle));
	controllers.add(new BluetoothDetailsButtonsController(context, this, mCachedDevice,
	lifecycle));
	controllers.add(new BluetoothDetailsCompanionAppsController(context, this,
	mCachedDevice, lifecycle));
	controllers.add(new BluetoothDetailsAudioDeviceTypeController(context, this, mManager,
	mCachedDevice, lifecycle));
	controllers.add(new BluetoothDetailsSpatialAudioController(context, this, mCachedDevice,
	lifecycle));
	controllers.add(new BluetoothDetailsProfilesController(context, this, mManager,
	mCachedDevice, lifecycle));
	controllers.add(new BluetoothDetailsMacAddressController(context, this, mCachedDevice,
	lifecycle));
	controllers.add(new StylusDevicesController(context, mInputDevice, mCachedDevice,
	lifecycle));
	controllers.add(new BluetoothDetailsRelatedToolsController(context, this, mCachedDevice,
	lifecycle));
	controllers.add(new BluetoothDetailsPairOtherController(context, this, mCachedDevice,
	lifecycle));
	controllers.add(new BluetoothDetailsHearingDeviceControlsController(context, this,
	mCachedDevice, lifecycle));
	}
	return controllers;
	}

	private int getPaddingSize() {
	TypedArray resolvedAttributes =
	getContext().obtainStyledAttributes(
	new int[]{
	android.R.attr.listPreferredItemPaddingStart,
	android.R.attr.listPreferredItemPaddingEnd
	});
	int width = resolvedAttributes.getDimensionPixelSize(0, 0)
	+ resolvedAttributes.getDimensionPixelSize(1, 0);
	resolvedAttributes.recycle();
	return width;
	}

	@VisibleForTesting
	void setTitleForInputDevice() {
	if (StylusDevicesController.isDeviceStylus(mInputDevice, mCachedDevice)) {
	// This will override the default R.string.device_details_title "Device Details"
	// that will show on non-stylus bluetooth devices.
	// That title is set via the manifest and also from BluetoothDeviceUpdater.
	getActivity().setTitle(getContext().getString(R.string.stylus_device_details_title));
	}
	}
	}