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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.settings.bluetooth;
     18 
     19 import static android.os.UserManager.DISALLOW_CONFIG_BLUETOOTH;
     20 
     21 import android.bluetooth.BluetoothAdapter;
     22 import android.bluetooth.BluetoothDevice;
     23 import android.bluetooth.BluetoothDevicePicker;
     24 import android.content.Context;
     25 import android.content.Intent;
     26 import android.os.Bundle;
     27 import android.os.UserManager;
     28 
     29 import com.android.settings.R;
     30 
     31 /**
     32  * BluetoothSettings is the Settings screen for Bluetooth configuration and
     33  * connection management.
     34  */
     35 public final class DevicePickerFragment extends DeviceListPreferenceFragment {
     36 
     37     private boolean mNeedAuth;
     38     private String mLaunchPackage;
     39     private String mLaunchClass;
     40     private boolean mStartScanOnResume;
     41 
     42     @Override
     43     void addPreferencesForActivity() {
     44         addPreferencesFromResource(R.xml.device_picker);
     45 
     46         Intent intent = getActivity().getIntent();
     47         mNeedAuth = intent.getBooleanExtra(BluetoothDevicePicker.EXTRA_NEED_AUTH, false);
     48         setFilter(intent.getIntExtra(BluetoothDevicePicker.EXTRA_FILTER_TYPE,
     49                 BluetoothDevicePicker.FILTER_TYPE_ALL));
     50         mLaunchPackage = intent.getStringExtra(BluetoothDevicePicker.EXTRA_LAUNCH_PACKAGE);
     51         mLaunchClass = intent.getStringExtra(BluetoothDevicePicker.EXTRA_LAUNCH_CLASS);
     52     }
     53 
     54     @Override
     55     public void onCreate(Bundle savedInstanceState) {
     56         super.onCreate(savedInstanceState);
     57         getActivity().setTitle(getString(R.string.device_picker));
     58         UserManager um = (UserManager) getSystemService(Context.USER_SERVICE);
     59         mStartScanOnResume = !um.hasUserRestriction(DISALLOW_CONFIG_BLUETOOTH)
     60                 && (savedInstanceState == null);  // don't start scan after rotation
     61     }
     62 
     63     @Override
     64     public void onResume() {
     65         super.onResume();
     66         addCachedDevices();
     67         if (mStartScanOnResume) {
     68             mLocalAdapter.startScanning(true);
     69             mStartScanOnResume = false;
     70         }
     71     }
     72 
     73     @Override
     74     void onDevicePreferenceClick(BluetoothDevicePreference btPreference) {
     75         mLocalAdapter.stopScanning();
     76         LocalBluetoothPreferences.persistSelectedDeviceInPicker(
     77                 getActivity(), mSelectedDevice.getAddress());
     78         if ((btPreference.getCachedDevice().getBondState() ==
     79                 BluetoothDevice.BOND_BONDED) || !mNeedAuth) {
     80             sendDevicePickedIntent(mSelectedDevice);
     81             finish();
     82         } else {
     83             super.onDevicePreferenceClick(btPreference);
     84         }
     85     }
     86 
     87     public void onDeviceBondStateChanged(CachedBluetoothDevice cachedDevice,
     88             int bondState) {
     89         if (bondState == BluetoothDevice.BOND_BONDED) {
     90             BluetoothDevice device = cachedDevice.getDevice();
     91             if (device.equals(mSelectedDevice)) {
     92                 sendDevicePickedIntent(device);
     93                 finish();
     94             }
     95         }
     96     }
     97 
     98     @Override
     99     public void onBluetoothStateChanged(int bluetoothState) {
    100         super.onBluetoothStateChanged(bluetoothState);
    101 
    102         if (bluetoothState == BluetoothAdapter.STATE_ON) {
    103             mLocalAdapter.startScanning(false);
    104         }
    105     }
    106 
    107     private void sendDevicePickedIntent(BluetoothDevice device) {
    108         Intent intent = new Intent(BluetoothDevicePicker.ACTION_DEVICE_SELECTED);
    109         intent.putExtra(BluetoothDevice.EXTRA_DEVICE, device);
    110         if (mLaunchPackage != null && mLaunchClass != null) {
    111             intent.setClassName(mLaunchPackage, mLaunchClass);
    112         }
    113         getActivity().sendBroadcast(intent);
    114     }
    115 }
    116