Refactor the waypoint insertion code.

2010-12-11 19:14:47 -08:00
commit 33d9230442
321 changed files with 43697 additions and 0 deletions
@@ -0,0 +1,200 @@
+/*
+ * Copyright 2010 Google Inc.
+ * 
+ * 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.google.android.apps.mytracks.util;
+
+import com.google.android.apps.mytracks.MyTracksConstants;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothClass;
+import android.bluetooth.BluetoothDevice;
+import android.os.Build;
+import android.util.Log;
+
+import java.util.List;
+import java.util.Set;
+
+/**
+ * Utilities for dealing with bluetooth devices.
+ * This can be used safely even in systems that don't support bluetooth,
+ * in which case a dummy implementation will be used.
+ *
+ * @author Rodrigo Damazio
+ */
+public abstract class BluetoothDeviceUtils {
+  public static final String ANY_DEVICE = "any";
+  private static BluetoothDeviceUtils instance;
+
+  /**
+   * Dummy implementation, for systems that don't support bluetooth.
+   */
+  private static class DummyImpl extends BluetoothDeviceUtils {
+    @Override
+    public void populateDeviceLists(List<String> deviceNames, List<String> deviceAddresses) {
+      // Do nothing - no devices to add
+    }
+
+    @Override
+    public BluetoothDevice findDeviceMatching(String targetDeviceAddress) {
+      return null;
+    }
+  }
+
+  /**
+   * Real implementation, for systems that DO support bluetooth.
+   */
+  private static class RealImpl extends BluetoothDeviceUtils {
+    private final BluetoothAdapter bluetoothAdapter;
+
+    public RealImpl() {
+      bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
+
+      if (bluetoothAdapter == null) {
+        throw new IllegalStateException("Unable to get bluetooth adapter");
+      }
+    }
+
+    @Override
+    public void populateDeviceLists(List<String> deviceNames, List<String> deviceAddresses) {
+      ensureNotDiscovering();
+
+      Set<BluetoothDevice> pairedDevices = bluetoothAdapter.getBondedDevices();
+      for (BluetoothDevice device : pairedDevices) {
+        BluetoothClass bluetoothClass = device.getBluetoothClass();
+        if (bluetoothClass != null) {
+          // Not really sure what we want, but I know what we don't want.
+          switch(bluetoothClass.getMajorDeviceClass()) {
+            case BluetoothClass.Device.Major.COMPUTER:
+            case BluetoothClass.Device.Major.PHONE:
+              break;
+            default:
+              deviceAddresses.add(device.getAddress());
+              deviceNames.add(device.getName());
+          }
+        }
+      }
+    }
+
+    @Override
+    public BluetoothDevice findDeviceMatching(String targetDeviceAddress) {
+      if (targetDeviceAddress.equals(ANY_DEVICE)) {
+        return findAnyDevice();
+      } else {
+        return findDeviceByAddress(targetDeviceAddress);
+      }
+    }
+
+    /**
+     * Finds and returns the first suitable bluetooth sensor.
+     */
+    private BluetoothDevice findAnyDevice() {
+      ensureNotDiscovering();
+
+      Set<BluetoothDevice> pairedDevices = bluetoothAdapter.getBondedDevices();
+      for (BluetoothDevice device : pairedDevices) {
+        // Look for the first paired computer device
+        if (isSuitableDevice(device)) {
+          return device;
+        }
+      }
+
+      return null;
+    }
+
+    /**
+     * Finds and returns a device with the given address, or null if it's not
+     * a suitable sensor.
+     */
+    private BluetoothDevice findDeviceByAddress(String targetDeviceAddress) {
+      ensureNotDiscovering();
+
+      BluetoothDevice device = bluetoothAdapter.getRemoteDevice(targetDeviceAddress);
+      if (isSuitableDevice(device)) {
+        return device;
+      }
+
+      return null;
+    }
+
+    /**
+     * Ensures the bluetooth adapter is not in discovery mode.
+     */
+    private void ensureNotDiscovering() {
+      // If it's in discovery mode, cancel that for now.
+      bluetoothAdapter.cancelDiscovery();
+    }
+
+    /**
+     * Checks whether the given device is a suitable sensor.
+     *
+     * @param device the device to check
+     * @return true if it's suitable, false otherwise
+     */
+    private boolean isSuitableDevice(BluetoothDevice device) {
+      // Check that the device is bonded
+      if (device.getBondState() != BluetoothDevice.BOND_BONDED) {
+        return false;
+      }
+
+      return true;
+    }
+  }
+
+  /**
+   * Returns the proper (singleton) instance of this class.
+   */
+  public static BluetoothDeviceUtils getInstance() {
+    if (instance == null) {
+      if (!isBluetoothMethodSupported()) {
+        Log.d(MyTracksConstants.TAG, "Using dummy bluetooth utils");
+        instance = new DummyImpl();
+      } else {
+        Log.d(MyTracksConstants.TAG, "Using real bluetooth utils");
+        try {
+          instance = new RealImpl();
+        } catch (IllegalStateException ise) {
+          Log.w(MyTracksConstants.TAG, "Oops, I mean, using dummy bluetooth utils", ise);
+          instance = new DummyImpl();
+        }
+      }
+    }
+    return instance;
+  }
+
+  /**
+   * Populates the given lists with the names and addresses of all suitable
+   * bluetooth devices.
+   *
+   * @param deviceNames the list to populate with user-visible names
+   * @param deviceAddresses the list to populate with device addresses
+   */
+  public abstract void populateDeviceLists(List<String> deviceNames, List<String> deviceAddresses);
+
+  /**
+   * Finds the bluetooth device with the given address.
+   *
+   * @param targetDeviceAddress the address of the device, or
+   *        {@link #ANY_DEVICE} for using the first suitable device
+   * @return the device's descriptor, or null if not found
+   */
+  public abstract BluetoothDevice findDeviceMatching(String targetDeviceAddress);
+
+  /**
+   * @return whether the bluetooth method is supported on this device
+   */
+  public static boolean isBluetoothMethodSupported() {
+    return Integer.parseInt(Build.VERSION.SDK) >= 5;
+  }
+}