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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 android.bluetooth.BluetoothAdapter;
     20 import android.bluetooth.BluetoothDevice;
     21 import android.bluetooth.BluetoothDevicePicker;
     22 import android.content.Intent;
     23 import android.os.Bundle;
     24 
     25 import com.android.settings.R;
     26 
     27 /**
     28  * BluetoothSettings is the Settings screen for Bluetooth configuration and
     29  * connection management.
     30  */
     31 public final class DevicePickerFragment extends DeviceListPreferenceFragment {
     32 
     33     private boolean mNeedAuth;
     34     private String mLaunchPackage;
     35     private String mLaunchClass;
     36     private boolean mStartScanOnResume;
     37 
     38     @Override
     39     void addPreferencesForActivity() {
     40         addPreferencesFromResource(R.xml.device_picker);
     41 
     42         Intent intent = getActivity().getIntent();
     43         mNeedAuth = intent.getBooleanExtra(BluetoothDevicePicker.EXTRA_NEED_AUTH, false);
     44         setFilter(intent.getIntExtra(BluetoothDevicePicker.EXTRA_FILTER_TYPE,
     45                 BluetoothDevicePicker.FILTER_TYPE_ALL));
     46         mLaunchPackage = intent.getStringExtra(BluetoothDevicePicker.EXTRA_LAUNCH_PACKAGE);
     47         mLaunchClass = intent.getStringExtra(BluetoothDevicePicker.EXTRA_LAUNCH_CLASS);
     48     }
     49 
     50     @Override
     51     public void onCreate(Bundle savedInstanceState) {
     52         super.onCreate(savedInstanceState);
     53         getActivity().setTitle(getString(R.string.device_picker));
     54         mStartScanOnResume = (savedInstanceState == null);  // don't start scan after rotation
     55     }
     56 
     57     @Override
     58     public void onResume() {
     59         super.onResume();
     60         addCachedDevices();
     61         if (mStartScanOnResume) {
     62             mLocalAdapter.startScanning(true);
     63             mStartScanOnResume = false;
     64         }
     65     }
     66 
     67     @Override
     68     void onDevicePreferenceClick(BluetoothDevicePreference btPreference) {
     69         mLocalAdapter.stopScanning();
     70         LocalBluetoothPreferences.persistSelectedDeviceInPicker(
     71                 getActivity(), mSelectedDevice.getAddress());
     72         if ((btPreference.getCachedDevice().getBondState() ==
     73                 BluetoothDevice.BOND_BONDED) || !mNeedAuth) {
     74             sendDevicePickedIntent(mSelectedDevice);
     75             finish();
     76         } else {
     77             super.onDevicePreferenceClick(btPreference);
     78         }
     79     }
     80 
     81     public void onDeviceBondStateChanged(CachedBluetoothDevice cachedDevice,
     82             int bondState) {
     83         if (bondState == BluetoothDevice.BOND_BONDED) {
     84             BluetoothDevice device = cachedDevice.getDevice();
     85             if (device.equals(mSelectedDevice)) {
     86                 sendDevicePickedIntent(device);
     87                 finish();
     88             }
     89         }
     90     }
     91 
     92     @Override
     93     public void onBluetoothStateChanged(int bluetoothState) {
     94         super.onBluetoothStateChanged(bluetoothState);
     95 
     96         if (bluetoothState == BluetoothAdapter.STATE_ON) {
     97             mLocalAdapter.startScanning(false);
     98         }
     99     }
    100 
    101     private void sendDevicePickedIntent(BluetoothDevice device) {
    102         Intent intent = new Intent(BluetoothDevicePicker.ACTION_DEVICE_SELECTED);
    103         intent.putExtra(BluetoothDevice.EXTRA_DEVICE, device);
    104         if (mLaunchPackage != null && mLaunchClass != null) {
    105             intent.setClassName(mLaunchPackage, mLaunchClass);
    106         }
    107         getActivity().sendBroadcast(intent);
    108     }
    109 }
    110