src/com/android/settings/bluetooth/LocalBluetoothManager.java - platform/packages/apps/Settings - Git at Google

 /*
  * Copyright (C) 2008 The Android Open Source Project
  *
  * 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.android.settings.bluetooth;

 import com.android.settings.R;

 import android.app.Activity;
 import android.app.AlertDialog;
 import android.bluetooth.BluetoothA2dp;
 import android.bluetooth.BluetoothAdapter;
 import android.bluetooth.BluetoothDevice;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.util.Config;
 import android.util.Log;
 import android.widget.Toast;

 import java.util.ArrayList;
 import java.util.List;
 import java.util.Set;

 // TODO: have some notion of shutting down.  Maybe a minute after they leave BT settings?
 /**
  * LocalBluetoothManager provides a simplified interface on top of a subset of
  * the Bluetooth API.
  */
 public class LocalBluetoothManager {
     private static final String TAG = "LocalBluetoothManager";
     static final boolean V = Config.LOGV;
     static final boolean D = Config.LOGD;

     private static final String SHARED_PREFERENCES_NAME = "bluetooth_settings";

     private static LocalBluetoothManager INSTANCE;
     /** Used when obtaining a reference to the singleton instance. */
     private static Object INSTANCE_LOCK = new Object();
     private boolean mInitialized;

     private Context mContext;
     /** If a BT-related activity is in the foreground, this will be it. */
     private Activity mForegroundActivity;
     private AlertDialog mErrorDialog = null;

     private BluetoothAdapter mAdapter;

     private CachedBluetoothDeviceManager mCachedDeviceManager;
     private BluetoothEventRedirector mEventRedirector;
     private BluetoothA2dp mBluetoothA2dp;

     private int mState = BluetoothAdapter.ERROR;

     private List<Callback> mCallbacks = new ArrayList<Callback>();

     private static final int SCAN_EXPIRATION_MS = 5 * 60 * 1000; // 5 mins

     // If a device was picked from the device picker or was in discoverable mode
     // in the last 60 seconds, show the pairing dialogs in foreground instead
     // of raising notifications
     private static long GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND = 60 * 1000;

     private static final String SHARED_PREFERENCES_KEY_LAST_SELECTED_DEVICE =
         "last_selected_device";

     private static final String SHARED_PREFERENCES_KEY_LAST_SELECTED_DEVICE_TIME =
         "last_selected_device_time";

     private static final String SHARED_PREFERENCES_KEY_DOCK_AUTO_CONNECT = "auto_connect_to_dock";

     private long mLastScan;

     public static LocalBluetoothManager getInstance(Context context) {
         synchronized (INSTANCE_LOCK) {
             if (INSTANCE == null) {
                 INSTANCE = new LocalBluetoothManager();
             }

             if (!INSTANCE.init(context)) {
                 return null;
             }

             LocalBluetoothProfileManager.init(INSTANCE);

             return INSTANCE;
         }
     }

     private boolean init(Context context) {
         if (mInitialized) return true;
         mInitialized = true;

         // This will be around as long as this process is
         mContext = context.getApplicationContext();

         mAdapter = BluetoothAdapter.getDefaultAdapter();
         if (mAdapter == null) {
             return false;
         }

         mCachedDeviceManager = new CachedBluetoothDeviceManager(this);

         mEventRedirector = new BluetoothEventRedirector(this);
         mEventRedirector.start();

         mBluetoothA2dp = new BluetoothA2dp(context);

         return true;
     }

     public BluetoothAdapter getBluetoothAdapter() {
         return mAdapter;
     }

     public Context getContext() {
         return mContext;
     }

     public Activity getForegroundActivity() {
         return mForegroundActivity;
     }

     public void setForegroundActivity(Activity activity) {
         if (mErrorDialog != null) {
             mErrorDialog.dismiss();
             mErrorDialog = null;
         }
         mForegroundActivity = activity;
     }

     public SharedPreferences getSharedPreferences() {
         return mContext.getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE);
     }

     public CachedBluetoothDeviceManager getCachedDeviceManager() {
         return mCachedDeviceManager;
     }

     List<Callback> getCallbacks() {
         return mCallbacks;
     }

     public void registerCallback(Callback callback) {
         synchronized (mCallbacks) {
             mCallbacks.add(callback);
         }
     }

     public void unregisterCallback(Callback callback) {
         synchronized (mCallbacks) {
             mCallbacks.remove(callback);
         }
     }

     public void startScanning(boolean force) {
         if (mAdapter.isDiscovering()) {
             /*
              * Already discovering, but give the callback that information.
              * Note: we only call the callbacks, not the same path as if the
              * scanning state had really changed (in that case the device
              * manager would clear its list of unpaired scanned devices).
              */
             dispatchScanningStateChanged(true);
         } else {
             if (!force) {
                 // Don't scan more than frequently than SCAN_EXPIRATION_MS,
                 // unless forced
                 if (mLastScan + SCAN_EXPIRATION_MS > System.currentTimeMillis()) {
                     return;
                 }

                 // If we are playing music, don't scan unless forced.
                 Set<BluetoothDevice> sinks = mBluetoothA2dp.getConnectedSinks();
                 if (sinks != null) {
                     for (BluetoothDevice sink : sinks) {
                         if (mBluetoothA2dp.getSinkState(sink) == BluetoothA2dp.STATE_PLAYING) {
                             return;
                         }
                     }
                 }
             }

             if (mAdapter.startDiscovery()) {
                 mLastScan = System.currentTimeMillis();
             }
         }
     }

     public int getBluetoothState() {

         if (mState == BluetoothAdapter.ERROR) {
             syncBluetoothState();
         }

         return mState;
     }

     void setBluetoothStateInt(int state) {
         mState = state;
         if (state == BluetoothAdapter.STATE_ON ||
             state == BluetoothAdapter.STATE_OFF) {
             mCachedDeviceManager.onBluetoothStateChanged(state ==
                     BluetoothAdapter.STATE_ON);
         }
     }

     private void syncBluetoothState() {
         int bluetoothState;

         if (mAdapter != null) {
             bluetoothState = mAdapter.isEnabled()
                     ? BluetoothAdapter.STATE_ON
                     : BluetoothAdapter.STATE_OFF;
         } else {
             bluetoothState = BluetoothAdapter.ERROR;
         }

         setBluetoothStateInt(bluetoothState);
     }

     public void setBluetoothEnabled(boolean enabled) {
         boolean wasSetStateSuccessful = enabled
                 ? mAdapter.enable()
                 : mAdapter.disable();

         if (wasSetStateSuccessful) {
             setBluetoothStateInt(enabled
                 ? BluetoothAdapter.STATE_TURNING_ON
                 : BluetoothAdapter.STATE_TURNING_OFF);
         } else {
             if (V) {
                 Log.v(TAG,
                         "setBluetoothEnabled call, manager didn't return success for enabled: "
                                 + enabled);
             }

             syncBluetoothState();
         }
     }

     /**
      * @param started True if scanning started, false if scanning finished.
      */
     void onScanningStateChanged(boolean started) {
         // TODO: have it be a callback (once we switch bluetooth state changed to callback)
         mCachedDeviceManager.onScanningStateChanged(started);
         dispatchScanningStateChanged(started);
     }

     private void dispatchScanningStateChanged(boolean started) {
         synchronized (mCallbacks) {
             for (Callback callback : mCallbacks) {
                 callback.onScanningStateChanged(started);
             }
         }
     }

     public void showError(BluetoothDevice device, int titleResId, int messageResId) {
         CachedBluetoothDevice cachedDevice = mCachedDeviceManager.findDevice(device);
         String name = null;
         if (cachedDevice == null) {
             if (device != null) name = device.getName();

             if (name == null) {
                 name = mContext.getString(R.string.bluetooth_remote_device);
             }
         } else {
             name = cachedDevice.getName();
         }
         String message = mContext.getString(messageResId, name);

         if (mForegroundActivity != null) {
             // Need an activity context to show a dialog
             mErrorDialog = new AlertDialog.Builder(mForegroundActivity)
                 .setIcon(android.R.drawable.ic_dialog_alert)
                 .setTitle(titleResId)
                 .setMessage(message)
                 .setPositiveButton(android.R.string.ok, null)
                 .show();
         } else {
             // Fallback on a toast
             Toast.makeText(mContext, message, Toast.LENGTH_LONG).show();
         }
     }

     public interface Callback {
         void onScanningStateChanged(boolean started);
         void onDeviceAdded(CachedBluetoothDevice cachedDevice);
         void onDeviceDeleted(CachedBluetoothDevice cachedDevice);
     }

     public boolean shouldShowDialogInForeground(String deviceAddress) {
         // If Bluetooth Settings is visible
         if (mForegroundActivity != null) return true;

         long currentTimeMillis = System.currentTimeMillis();
         SharedPreferences sharedPreferences = getSharedPreferences();

         // If the device was in discoverable mode recently
         long lastDiscoverableEndTime = sharedPreferences.getLong(
                 BluetoothDiscoverableEnabler.SHARED_PREFERENCES_KEY_DISCOVERABLE_END_TIMESTAMP, 0);
         if ((lastDiscoverableEndTime + GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND)
                 > currentTimeMillis) {
             return true;
         }

         // If the device was picked in the device picker recently
         if (deviceAddress != null) {
             String lastSelectedDevice = sharedPreferences.getString(
                     SHARED_PREFERENCES_KEY_LAST_SELECTED_DEVICE, null);

             if (deviceAddress.equals(lastSelectedDevice)) {
                 long lastDeviceSelectedTime = sharedPreferences.getLong(
                         SHARED_PREFERENCES_KEY_LAST_SELECTED_DEVICE_TIME, 0);
                 if ((lastDeviceSelectedTime + GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND)
                         > currentTimeMillis) {
                     return true;
                 }
             }
         }
         return false;
     }

     void persistSelectedDeviceInPicker(String deviceAddress) {
         SharedPreferences.Editor editor = getSharedPreferences().edit();
         editor.putString(LocalBluetoothManager.SHARED_PREFERENCES_KEY_LAST_SELECTED_DEVICE,
                 deviceAddress);
         editor.putLong(LocalBluetoothManager.SHARED_PREFERENCES_KEY_LAST_SELECTED_DEVICE_TIME,
                 System.currentTimeMillis());
         editor.commit();
     }

     public boolean hasDockAutoConnectSetting(String addr) {
         return getSharedPreferences().contains(SHARED_PREFERENCES_KEY_DOCK_AUTO_CONNECT + addr);
     }

     public boolean getDockAutoConnectSetting(String addr) {
         return getSharedPreferences().getBoolean(SHARED_PREFERENCES_KEY_DOCK_AUTO_CONNECT + addr,
                 false);
     }

     public void saveDockAutoConnectSetting(String addr, boolean autoConnect) {
         SharedPreferences.Editor editor = getSharedPreferences().edit();
         editor.putBoolean(SHARED_PREFERENCES_KEY_DOCK_AUTO_CONNECT + addr, autoConnect);
         editor.commit();
     }

     public void removeDockAutoConnectSetting(String addr) {
         SharedPreferences.Editor editor = getSharedPreferences().edit();
         editor.remove(SHARED_PREFERENCES_KEY_DOCK_AUTO_CONNECT + addr);
         editor.commit();
     }
 }
	/*
	* Copyright (C) 2008 The Android Open Source Project
	*
	* 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.android.settings.bluetooth;

	import com.android.settings.R;

	import android.app.Activity;
	import android.app.AlertDialog;
	import android.bluetooth.BluetoothA2dp;
	import android.bluetooth.BluetoothAdapter;
	import android.bluetooth.BluetoothDevice;
	import android.content.Context;
	import android.content.SharedPreferences;
	import android.util.Config;
	import android.util.Log;
	import android.widget.Toast;

	import java.util.ArrayList;
	import java.util.List;
	import java.util.Set;

	// TODO: have some notion of shutting down. Maybe a minute after they leave BT settings?
	/**
	* LocalBluetoothManager provides a simplified interface on top of a subset of
	* the Bluetooth API.
	*/
	public class LocalBluetoothManager {
	private static final String TAG = "LocalBluetoothManager";
	static final boolean V = Config.LOGV;
	static final boolean D = Config.LOGD;

	private static final String SHARED_PREFERENCES_NAME = "bluetooth_settings";

	private static LocalBluetoothManager INSTANCE;
	/** Used when obtaining a reference to the singleton instance. */
	private static Object INSTANCE_LOCK = new Object();
	private boolean mInitialized;

	private Context mContext;
	/** If a BT-related activity is in the foreground, this will be it. */
	private Activity mForegroundActivity;
	private AlertDialog mErrorDialog = null;

	private BluetoothAdapter mAdapter;

	private CachedBluetoothDeviceManager mCachedDeviceManager;
	private BluetoothEventRedirector mEventRedirector;
	private BluetoothA2dp mBluetoothA2dp;

	private int mState = BluetoothAdapter.ERROR;

	private List<Callback> mCallbacks = new ArrayList<Callback>();

	private static final int SCAN_EXPIRATION_MS = 5 * 60 * 1000; // 5 mins

	// If a device was picked from the device picker or was in discoverable mode
	// in the last 60 seconds, show the pairing dialogs in foreground instead
	// of raising notifications
	private static long GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND = 60 * 1000;

	private static final String SHARED_PREFERENCES_KEY_LAST_SELECTED_DEVICE =
	"last_selected_device";

	private static final String SHARED_PREFERENCES_KEY_LAST_SELECTED_DEVICE_TIME =
	"last_selected_device_time";

	private static final String SHARED_PREFERENCES_KEY_DOCK_AUTO_CONNECT = "auto_connect_to_dock";

	private long mLastScan;

	public static LocalBluetoothManager getInstance(Context context) {
	synchronized (INSTANCE_LOCK) {
	if (INSTANCE == null) {
	INSTANCE = new LocalBluetoothManager();
	}

	if (!INSTANCE.init(context)) {
	return null;
	}

	LocalBluetoothProfileManager.init(INSTANCE);

	return INSTANCE;
	}
	}

	private boolean init(Context context) {
	if (mInitialized) return true;
	mInitialized = true;

	// This will be around as long as this process is
	mContext = context.getApplicationContext();

	mAdapter = BluetoothAdapter.getDefaultAdapter();
	if (mAdapter == null) {
	return false;
	}

	mCachedDeviceManager = new CachedBluetoothDeviceManager(this);

	mEventRedirector = new BluetoothEventRedirector(this);
	mEventRedirector.start();

	mBluetoothA2dp = new BluetoothA2dp(context);

	return true;
	}

	public BluetoothAdapter getBluetoothAdapter() {
	return mAdapter;
	}

	public Context getContext() {
	return mContext;
	}

	public Activity getForegroundActivity() {
	return mForegroundActivity;
	}

	public void setForegroundActivity(Activity activity) {
	if (mErrorDialog != null) {
	mErrorDialog.dismiss();
	mErrorDialog = null;
	}
	mForegroundActivity = activity;
	}

	public SharedPreferences getSharedPreferences() {
	return mContext.getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE);
	}

	public CachedBluetoothDeviceManager getCachedDeviceManager() {
	return mCachedDeviceManager;
	}

	List<Callback> getCallbacks() {
	return mCallbacks;
	}

	public void registerCallback(Callback callback) {
	synchronized (mCallbacks) {
	mCallbacks.add(callback);
	}
	}

	public void unregisterCallback(Callback callback) {
	synchronized (mCallbacks) {
	mCallbacks.remove(callback);
	}
	}

	public void startScanning(boolean force) {
	if (mAdapter.isDiscovering()) {
	/*
	* Already discovering, but give the callback that information.
	* Note: we only call the callbacks, not the same path as if the
	* scanning state had really changed (in that case the device
	* manager would clear its list of unpaired scanned devices).
	*/
	dispatchScanningStateChanged(true);
	} else {
	if (!force) {
	// Don't scan more than frequently than SCAN_EXPIRATION_MS,
	// unless forced
	if (mLastScan + SCAN_EXPIRATION_MS > System.currentTimeMillis()) {
	return;
	}

	// If we are playing music, don't scan unless forced.
	Set<BluetoothDevice> sinks = mBluetoothA2dp.getConnectedSinks();
	if (sinks != null) {
	for (BluetoothDevice sink : sinks) {
	if (mBluetoothA2dp.getSinkState(sink) == BluetoothA2dp.STATE_PLAYING) {
	return;
	}
	}
	}
	}

	if (mAdapter.startDiscovery()) {
	mLastScan = System.currentTimeMillis();
	}
	}
	}

	public int getBluetoothState() {

	if (mState == BluetoothAdapter.ERROR) {
	syncBluetoothState();
	}

	return mState;
	}

	void setBluetoothStateInt(int state) {
	mState = state;
	if (state == BluetoothAdapter.STATE_ON \|\|
	state == BluetoothAdapter.STATE_OFF) {
	mCachedDeviceManager.onBluetoothStateChanged(state ==
	BluetoothAdapter.STATE_ON);
	}
	}

	private void syncBluetoothState() {
	int bluetoothState;

	if (mAdapter != null) {
	bluetoothState = mAdapter.isEnabled()
	? BluetoothAdapter.STATE_ON
	: BluetoothAdapter.STATE_OFF;
	} else {
	bluetoothState = BluetoothAdapter.ERROR;
	}

	setBluetoothStateInt(bluetoothState);
	}

	public void setBluetoothEnabled(boolean enabled) {
	boolean wasSetStateSuccessful = enabled
	? mAdapter.enable()
	: mAdapter.disable();

	if (wasSetStateSuccessful) {
	setBluetoothStateInt(enabled
	? BluetoothAdapter.STATE_TURNING_ON
	: BluetoothAdapter.STATE_TURNING_OFF);
	} else {
	if (V) {
	Log.v(TAG,
	"setBluetoothEnabled call, manager didn't return success for enabled: "
	+ enabled);
	}

	syncBluetoothState();
	}
	}

	/**
	* @param started True if scanning started, false if scanning finished.
	*/
	void onScanningStateChanged(boolean started) {
	// TODO: have it be a callback (once we switch bluetooth state changed to callback)
	mCachedDeviceManager.onScanningStateChanged(started);
	dispatchScanningStateChanged(started);
	}

	private void dispatchScanningStateChanged(boolean started) {
	synchronized (mCallbacks) {
	for (Callback callback : mCallbacks) {
	callback.onScanningStateChanged(started);
	}
	}
	}

	public void showError(BluetoothDevice device, int titleResId, int messageResId) {
	CachedBluetoothDevice cachedDevice = mCachedDeviceManager.findDevice(device);
	String name = null;
	if (cachedDevice == null) {
	if (device != null) name = device.getName();

	if (name == null) {
	name = mContext.getString(R.string.bluetooth_remote_device);
	}
	} else {
	name = cachedDevice.getName();
	}
	String message = mContext.getString(messageResId, name);

	if (mForegroundActivity != null) {
	// Need an activity context to show a dialog
	mErrorDialog = new AlertDialog.Builder(mForegroundActivity)
	.setIcon(android.R.drawable.ic_dialog_alert)
	.setTitle(titleResId)
	.setMessage(message)
	.setPositiveButton(android.R.string.ok, null)
	.show();
	} else {
	// Fallback on a toast
	Toast.makeText(mContext, message, Toast.LENGTH_LONG).show();
	}
	}

	public interface Callback {
	void onScanningStateChanged(boolean started);
	void onDeviceAdded(CachedBluetoothDevice cachedDevice);
	void onDeviceDeleted(CachedBluetoothDevice cachedDevice);
	}

	public boolean shouldShowDialogInForeground(String deviceAddress) {
	// If Bluetooth Settings is visible
	if (mForegroundActivity != null) return true;

	long currentTimeMillis = System.currentTimeMillis();
	SharedPreferences sharedPreferences = getSharedPreferences();

	// If the device was in discoverable mode recently
	long lastDiscoverableEndTime = sharedPreferences.getLong(
	BluetoothDiscoverableEnabler.SHARED_PREFERENCES_KEY_DISCOVERABLE_END_TIMESTAMP, 0);
	if ((lastDiscoverableEndTime + GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND)
	> currentTimeMillis) {
	return true;
	}

	// If the device was picked in the device picker recently
	if (deviceAddress != null) {
	String lastSelectedDevice = sharedPreferences.getString(
	SHARED_PREFERENCES_KEY_LAST_SELECTED_DEVICE, null);

	if (deviceAddress.equals(lastSelectedDevice)) {
	long lastDeviceSelectedTime = sharedPreferences.getLong(
	SHARED_PREFERENCES_KEY_LAST_SELECTED_DEVICE_TIME, 0);
	if ((lastDeviceSelectedTime + GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND)
	> currentTimeMillis) {
	return true;
	}
	}
	}
	return false;
	}

	void persistSelectedDeviceInPicker(String deviceAddress) {
	SharedPreferences.Editor editor = getSharedPreferences().edit();
	editor.putString(LocalBluetoothManager.SHARED_PREFERENCES_KEY_LAST_SELECTED_DEVICE,
	deviceAddress);
	editor.putLong(LocalBluetoothManager.SHARED_PREFERENCES_KEY_LAST_SELECTED_DEVICE_TIME,
	System.currentTimeMillis());
	editor.commit();
	}

	public boolean hasDockAutoConnectSetting(String addr) {
	return getSharedPreferences().contains(SHARED_PREFERENCES_KEY_DOCK_AUTO_CONNECT + addr);
	}

	public boolean getDockAutoConnectSetting(String addr) {
	return getSharedPreferences().getBoolean(SHARED_PREFERENCES_KEY_DOCK_AUTO_CONNECT + addr,
	false);
	}

	public void saveDockAutoConnectSetting(String addr, boolean autoConnect) {
	SharedPreferences.Editor editor = getSharedPreferences().edit();
	editor.putBoolean(SHARED_PREFERENCES_KEY_DOCK_AUTO_CONNECT + addr, autoConnect);
	editor.commit();
	}

	public void removeDockAutoConnectSetting(String addr) {
	SharedPreferences.Editor editor = getSharedPreferences().edit();
	editor.remove(SHARED_PREFERENCES_KEY_DOCK_AUTO_CONNECT + addr);
	editor.commit();
	}
	}