git.gag.com Git - fw/altos/blob - altosdroid/src/org/altusmetrum/AltosDroid/DeviceListActivity.java

   1 /*
   2  * Copyright (C) 2009 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 org.altusmetrum.AltosDroid;
  18
  19 import java.util.Set;
  20 import org.altusmetrum.AltosDroid.R;
  21
  22 import android.app.Activity;
  23 import android.bluetooth.BluetoothAdapter;
  24 import android.bluetooth.BluetoothDevice;
  25 import android.content.BroadcastReceiver;
  26 import android.content.Context;
  27 import android.content.Intent;
  28 import android.content.IntentFilter;
  29 import android.os.Bundle;
  30 import android.view.View;
  31 import android.view.Window;
  32 import android.view.View.OnClickListener;
  33 import android.widget.AdapterView;
  34 import android.widget.ArrayAdapter;
  35 import android.widget.Button;
  36 import android.widget.ListView;
  37 import android.widget.TextView;
  38 import android.widget.AdapterView.OnItemClickListener;
  39
  40 /**
  41  * This Activity appears as a dialog. It lists any paired devices and
  42  * devices detected in the area after discovery. When a device is chosen
  43  * by the user, the MAC address of the device is sent back to the parent
  44  * Activity in the result Intent.
  45  */
  46 public class DeviceListActivity extends Activity {
  47
  48         // Return Intent extra
  49         public static final String EXTRA_DEVICE_ADDRESS = "device_address";
  50         public static final String EXTRA_DEVICE_NAME = "device_name";
  51
  52         // Member fields
  53         private BluetoothAdapter mBtAdapter;
  54         private ArrayAdapter<String> mPairedDevicesArrayAdapter;
  55         private ArrayAdapter<String> mNewDevicesArrayAdapter;
  56
  57         @Override
  58         protected void onCreate(Bundle savedInstanceState) {
  59                 super.onCreate(savedInstanceState);
  60
  61                 // Setup the window
  62                 requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
  63                 setContentView(R.layout.device_list);
  64
  65                 // Set result CANCELED incase the user backs out
  66                 setResult(Activity.RESULT_CANCELED);
  67
  68                 // Initialize the button to perform device discovery
  69                 Button scanButton = (Button) findViewById(R.id.button_scan);
  70                 scanButton.setOnClickListener(new OnClickListener() {
  71                         public void onClick(View v) {
  72                                 doDiscovery();
  73                                 v.setVisibility(View.GONE);
  74                         }
  75                 });
  76
  77                 // Initialize array adapters. One for already paired devices and
  78                 // one for newly discovered devices
  79                 mPairedDevicesArrayAdapter = new ArrayAdapter<String>(this, R.layout.device_name);
  80                 mNewDevicesArrayAdapter = new ArrayAdapter<String>(this, R.layout.device_name);
  81
  82                 // Find and set up the ListView for paired devices
  83                 ListView pairedListView = (ListView) findViewById(R.id.paired_devices);
  84                 pairedListView.setAdapter(mPairedDevicesArrayAdapter);
  85                 pairedListView.setOnItemClickListener(mDeviceClickListener);
  86
  87                 // Find and set up the ListView for newly discovered devices
  88                 ListView newDevicesListView = (ListView) findViewById(R.id.new_devices);
  89                 newDevicesListView.setAdapter(mNewDevicesArrayAdapter);
  90                 newDevicesListView.setOnItemClickListener(mDeviceClickListener);
  91
  92                 // Register for broadcasts when a device is discovered
  93                 IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
  94                 this.registerReceiver(mReceiver, filter);
  95
  96                 // Register for broadcasts when discovery has finished
  97                 filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
  98                 this.registerReceiver(mReceiver, filter);
  99
 100                 // Get the local Bluetooth adapter
 101                 mBtAdapter = BluetoothAdapter.getDefaultAdapter();
 102
 103                 // Get a set of currently paired devices
 104                 Set<BluetoothDevice> pairedDevices = mBtAdapter.getBondedDevices();
 105
 106                 // If there are paired devices, add each one to the ArrayAdapter
 107                 if (pairedDevices.size() > 0) {
 108                         findViewById(R.id.title_paired_devices).setVisibility(View.VISIBLE);
 109                         for (BluetoothDevice device : pairedDevices)
 110                                 if (device.getName().startsWith("TeleBT"))
 111                                         mPairedDevicesArrayAdapter.add(device.getName() + "\n" + device.getAddress());
 112
 113                 } else {
 114                         String noDevices = getResources().getText(R.string.none_paired).toString();
 115                         mPairedDevicesArrayAdapter.add(noDevices);
 116                 }
 117         }
 118
 119         @Override
 120         protected void onDestroy() {
 121                 super.onDestroy();
 122
 123                 // Make sure we're not doing discovery anymore
 124                 if (mBtAdapter != null) {
 125                         mBtAdapter.cancelDiscovery();
 126                 }
 127
 128                 // Unregister broadcast listeners
 129                 this.unregisterReceiver(mReceiver);
 130         }
 131
 132         /**
 133         * Start device discover with the BluetoothAdapter
 134         */
 135         private void doDiscovery() {
 136                 AltosDebug.debug("doDiscovery()");
 137
 138                 // Indicate scanning in the title
 139                 setProgressBarIndeterminateVisibility(true);
 140                 setTitle(R.string.scanning);
 141
 142                 // Turn on sub-title for new devices
 143                 findViewById(R.id.title_new_devices).setVisibility(View.VISIBLE);
 144
 145                 // If we're already discovering, stop it
 146                 if (mBtAdapter.isDiscovering()) {
 147                         mBtAdapter.cancelDiscovery();
 148                 }
 149
 150                 // Request discover from BluetoothAdapter
 151                 mBtAdapter.startDiscovery();
 152         }
 153
 154         // The on-click listener for all devices in the ListViews
 155         private OnItemClickListener mDeviceClickListener = new OnItemClickListener() {
 156                 public void onItemClick(AdapterView<?> av, View v, int arg2, long arg3) {
 157                         // Cancel discovery because it's costly and we're about to connect
 158                         mBtAdapter.cancelDiscovery();
 159
 160                         // Get the device MAC address, which is the last 17 chars in the View
 161                         String info = ((TextView) v).getText().toString();
 162                         String address = info.substring(info.length() - 17);
 163
 164                         int newline = info.indexOf('\n');
 165
 166                         String name = null;
 167                         if (newline > 0)
 168                                 name = info.substring(0, newline);
 169                         else
 170                                 name = info;
 171
 172                         AltosDebug.debug("******* selected item '%s'", info);
 173
 174                         // Create the result Intent and include the MAC address
 175                         Intent intent = new Intent();
 176                         intent.putExtra(EXTRA_DEVICE_ADDRESS, address);
 177                         intent.putExtra(EXTRA_DEVICE_NAME, name);
 178
 179                         // Set result and finish this Activity
 180                         setResult(Activity.RESULT_OK, intent);
 181                         finish();
 182                 }
 183         };
 184
 185         // The BroadcastReceiver that listens for discovered devices and
 186         // changes the title when discovery is finished
 187         private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
 188                 @Override
 189                 public void onReceive(Context context, Intent intent) {
 190                         String action = intent.getAction();
 191
 192                         // When discovery finds a device
 193                         if (BluetoothDevice.ACTION_FOUND.equals(action)) {
 194                                 // Get the BluetoothDevice object from the Intent
 195                                 BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
 196                                 // If it's already paired, skip it, because it's been listed already
 197                                 if (   device.getBondState() != BluetoothDevice.BOND_BONDED
 198                                     && device.getName().startsWith("TeleBT")               ) {
 199                                         mNewDevicesArrayAdapter.add(device.getName() + "\n" + device.getAddress());
 200                                 }
 201                         // When discovery is finished, change the Activity title
 202                         } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
 203                                 setProgressBarIndeterminateVisibility(false);
 204                                 setTitle(R.string.select_device);
 205                                 if (mNewDevicesArrayAdapter.getCount() == 0) {
 206                                         String noDevices = getResources().getText(R.string.none_found).toString();
 207                                         mNewDevicesArrayAdapter.add(noDevices);
 208                                 }
 209                         }
 210                 }
 211         };
 212
 213 }