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.util.Log;
  31 import android.view.View;
  32 import android.view.Window;
  33 import android.view.View.OnClickListener;
  34 import android.widget.AdapterView;
  35 import android.widget.ArrayAdapter;
  36 import android.widget.Button;
  37 import android.widget.ListView;
  38 import android.widget.TextView;
  39 import android.widget.AdapterView.OnItemClickListener;
  40
  41 /**
  42  * This Activity appears as a dialog. It lists any paired devices and
  43  * devices detected in the area after discovery. When a device is chosen
  44  * by the user, the MAC address of the device is sent back to the parent
  45  * Activity in the result Intent.
  46  */
  47 public class DeviceListActivity extends Activity {
  48         // Debugging
  49         private static final String TAG = "DeviceListActivity";
  50         private static final boolean D = true;
  51
  52         // Return Intent extra
  53         public static final String EXTRA_DEVICE_ADDRESS = "device_address";
  54         public static final String EXTRA_DEVICE_NAME = "device_name";
  55
  56         // Member fields
  57         private BluetoothAdapter mBtAdapter;
  58         private ArrayAdapter<String> mPairedDevicesArrayAdapter;
  59         private ArrayAdapter<String> mNewDevicesArrayAdapter;
  60
  61         @Override
  62         protected void onCreate(Bundle savedInstanceState) {
  63                 super.onCreate(savedInstanceState);
  64
  65                 // Setup the window
  66                 requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
  67                 setContentView(R.layout.device_list);
  68
  69                 // Set result CANCELED incase the user backs out
  70                 setResult(Activity.RESULT_CANCELED);
  71
  72                 // Initialize the button to perform device discovery
  73                 Button scanButton = (Button) findViewById(R.id.button_scan);
  74                 scanButton.setOnClickListener(new OnClickListener() {
  75                         public void onClick(View v) {
  76                                 doDiscovery();
  77                                 v.setVisibility(View.GONE);
  78                         }
  79                 });
  80
  81                 // Initialize array adapters. One for already paired devices and
  82                 // one for newly discovered devices
  83                 mPairedDevicesArrayAdapter = new ArrayAdapter<String>(this, R.layout.device_name);
  84                 mNewDevicesArrayAdapter = new ArrayAdapter<String>(this, R.layout.device_name);
  85
  86                 // Find and set up the ListView for paired devices
  87                 ListView pairedListView = (ListView) findViewById(R.id.paired_devices);
  88                 pairedListView.setAdapter(mPairedDevicesArrayAdapter);
  89                 pairedListView.setOnItemClickListener(mDeviceClickListener);
  90
  91                 // Find and set up the ListView for newly discovered devices
  92                 ListView newDevicesListView = (ListView) findViewById(R.id.new_devices);
  93                 newDevicesListView.setAdapter(mNewDevicesArrayAdapter);
  94                 newDevicesListView.setOnItemClickListener(mDeviceClickListener);
  95
  96                 // Register for broadcasts when a device is discovered
  97                 IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
  98                 this.registerReceiver(mReceiver, filter);
  99
 100                 // Register for broadcasts when discovery has finished
 101                 filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
 102                 this.registerReceiver(mReceiver, filter);
 103
 104                 // Get the local Bluetooth adapter
 105                 mBtAdapter = BluetoothAdapter.getDefaultAdapter();
 106
 107                 // Get a set of currently paired devices
 108                 Set<BluetoothDevice> pairedDevices = mBtAdapter.getBondedDevices();
 109
 110                 // If there are paired devices, add each one to the ArrayAdapter
 111                 if (pairedDevices.size() > 0) {
 112                         findViewById(R.id.title_paired_devices).setVisibility(View.VISIBLE);
 113                         for (BluetoothDevice device : pairedDevices)
 114                                 if (device.getName().startsWith("TeleBT"))
 115                                         mPairedDevicesArrayAdapter.add(device.getName() + "\n" + device.getAddress());
 116
 117                 } else {
 118                         String noDevices = getResources().getText(R.string.none_paired).toString();
 119                         mPairedDevicesArrayAdapter.add(noDevices);
 120                 }
 121         }
 122
 123         @Override
 124         protected void onDestroy() {
 125                 super.onDestroy();
 126
 127                 // Make sure we're not doing discovery anymore
 128                 if (mBtAdapter != null) {
 129                         mBtAdapter.cancelDiscovery();
 130                 }
 131
 132                 // Unregister broadcast listeners
 133                 this.unregisterReceiver(mReceiver);
 134         }
 135
 136         /**
 137         * Start device discover with the BluetoothAdapter
 138         */
 139         private void doDiscovery() {
 140                 if (D) Log.d(TAG, "doDiscovery()");
 141
 142                 // Indicate scanning in the title
 143                 setProgressBarIndeterminateVisibility(true);
 144                 setTitle(R.string.scanning);
 145
 146                 // Turn on sub-title for new devices
 147                 findViewById(R.id.title_new_devices).setVisibility(View.VISIBLE);
 148
 149                 // If we're already discovering, stop it
 150                 if (mBtAdapter.isDiscovering()) {
 151                         mBtAdapter.cancelDiscovery();
 152                 }
 153
 154                 // Request discover from BluetoothAdapter
 155                 mBtAdapter.startDiscovery();
 156         }
 157
 158         // The on-click listener for all devices in the ListViews
 159         private OnItemClickListener mDeviceClickListener = new OnItemClickListener() {
 160                 public void onItemClick(AdapterView<?> av, View v, int arg2, long arg3) {
 161                         // Cancel discovery because it's costly and we're about to connect
 162                         mBtAdapter.cancelDiscovery();
 163
 164                         // Get the device MAC address, which is the last 17 chars in the View
 165                         String info = ((TextView) v).getText().toString();
 166                         String address = info.substring(info.length() - 17);
 167
 168                         int newline = info.indexOf('\n');
 169
 170                         String name = null;
 171                         if (newline > 0)
 172                                 name = info.substring(0, newline);
 173                         else
 174                                 name = info;
 175
 176                         if (D) Log.d(TAG, String.format("******* selected item '%s'", info));
 177
 178                         // Create the result Intent and include the MAC address
 179                         Intent intent = new Intent();
 180                         intent.putExtra(EXTRA_DEVICE_ADDRESS, address);
 181                         intent.putExtra(EXTRA_DEVICE_NAME, name);
 182
 183                         // Set result and finish this Activity
 184                         setResult(Activity.RESULT_OK, intent);
 185                         finish();
 186                 }
 187         };
 188
 189         // The BroadcastReceiver that listens for discovered devices and
 190         // changes the title when discovery is finished
 191         private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
 192                 @Override
 193                 public void onReceive(Context context, Intent intent) {
 194                         String action = intent.getAction();
 195
 196                         // When discovery finds a device
 197                         if (BluetoothDevice.ACTION_FOUND.equals(action)) {
 198                                 // Get the BluetoothDevice object from the Intent
 199                                 BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
 200                                 // If it's already paired, skip it, because it's been listed already
 201                                 if (   device.getBondState() != BluetoothDevice.BOND_BONDED
 202                                     && device.getName().startsWith("TeleBT")               ) {
 203                                         mNewDevicesArrayAdapter.add(device.getName() + "\n" + device.getAddress());
 204                                 }
 205                         // When discovery is finished, change the Activity title
 206                         } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
 207                                 setProgressBarIndeterminateVisibility(false);
 208                                 setTitle(R.string.select_device);
 209                                 if (mNewDevicesArrayAdapter.getCount() == 0) {
 210                                         String noDevices = getResources().getText(R.string.none_found).toString();
 211                                         mNewDevicesArrayAdapter.add(noDevices);
 212                                 }
 213                         }
 214                 }
 215         };
 216
 217 }