alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Android example source code file (UiModeManagerService.java)

This example Android source code file (UiModeManagerService.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" TM.

Java - Android tags/keywords

android, app, application, broadcastreceiver, bundle, configuration, content, intent, location, location_update_enable_interval_max, location_update_enable_interval_min, locationlistener, log, msg_update_twilight, notification, notificationmanager, os, override, remoteexception, string

The UiModeManagerService.java Android example source code

/*
 * 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.server;

import android.app.Activity;
import android.app.ActivityManagerNative;
import android.app.AlarmManager;
import android.app.IUiModeManager;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.StatusBarManager;
import android.app.UiModeManager;
import android.content.ActivityNotFoundException;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.content.res.Configuration;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.BatteryManager;
import android.os.Binder;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.PowerManager;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.SystemClock;
import android.provider.Settings;
import android.text.format.DateUtils;
import android.text.format.Time;
import android.util.Slog;

import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.util.Iterator;

import com.android.internal.R;
import com.android.internal.app.DisableCarModeActivity;

class UiModeManagerService extends IUiModeManager.Stub {
    private static final String TAG = UiModeManager.class.getSimpleName();
    private static final boolean LOG = false;

    private static final String KEY_LAST_UPDATE_INTERVAL = "LAST_UPDATE_INTERVAL";

    private static final int MSG_UPDATE_TWILIGHT = 0;
    private static final int MSG_ENABLE_LOCATION_UPDATES = 1;
    private static final int MSG_GET_NEW_LOCATION_UPDATE = 2;

    private static final long LOCATION_UPDATE_MS = 24 * DateUtils.HOUR_IN_MILLIS;
    private static final long MIN_LOCATION_UPDATE_MS = 30 * DateUtils.MINUTE_IN_MILLIS;
    private static final float LOCATION_UPDATE_DISTANCE_METER = 1000 * 20;
    private static final long LOCATION_UPDATE_ENABLE_INTERVAL_MIN = 5000;
    private static final long LOCATION_UPDATE_ENABLE_INTERVAL_MAX = 15 * DateUtils.MINUTE_IN_MILLIS;
    private static final double FACTOR_GMT_OFFSET_LONGITUDE = 1000.0 * 360.0 / DateUtils.DAY_IN_MILLIS;

    private static final String ACTION_UPDATE_NIGHT_MODE = "com.android.server.action.UPDATE_NIGHT_MODE";

    private final Context mContext;

    final Object mLock = new Object();

    private int mDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
    private int mLastBroadcastState = Intent.EXTRA_DOCK_STATE_UNDOCKED;

    private int mNightMode = UiModeManager.MODE_NIGHT_NO;
    private boolean mCarModeEnabled = false;
    private boolean mCharging = false;
    private final boolean mCarModeKeepsScreenOn;
    private final boolean mDeskModeKeepsScreenOn;

    private boolean mComputedNightMode;
    private int mCurUiMode = 0;
    private int mSetUiMode = 0;

    private boolean mHoldingConfiguration = false;
    private Configuration mConfiguration = new Configuration();

    private boolean mSystemReady;

    private NotificationManager mNotificationManager;

    private AlarmManager mAlarmManager;

    private LocationManager mLocationManager;
    private Location mLocation;
    private StatusBarManager mStatusBarManager;
    private final PowerManager.WakeLock mWakeLock;

    static Intent buildHomeIntent(String category) {
        Intent intent = new Intent(Intent.ACTION_MAIN);
        intent.addCategory(category);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
                | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
        return intent;
    }
    
    // The broadcast receiver which receives the result of the ordered broadcast sent when
    // the dock state changes. The original ordered broadcast is sent with an initial result
    // code of RESULT_OK. If any of the registered broadcast receivers changes this value, e.g.,
    // to RESULT_CANCELED, then the intent to start a dock app will not be sent.
    private final BroadcastReceiver mResultReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            if (getResultCode() != Activity.RESULT_OK) {
                return;
            }

            final int  enableFlags = intent.getIntExtra("enableFlags", 0);
            final int  disableFlags = intent.getIntExtra("disableFlags", 0);
            
            synchronized (mLock) {
                // Launch a dock activity
                String category = null;
                if (UiModeManager.ACTION_ENTER_CAR_MODE.equals(intent.getAction())) {
                    // Only launch car home when car mode is enabled and the caller
                    // has asked us to switch to it.
                    if ((enableFlags&UiModeManager.ENABLE_CAR_MODE_GO_CAR_HOME) != 0) {
                        category = Intent.CATEGORY_CAR_DOCK;
                    }
                } else if (UiModeManager.ACTION_ENTER_DESK_MODE.equals(intent.getAction())) {
                    // Only launch car home when desk mode is enabled and the caller
                    // has asked us to switch to it.  Currently re-using the car
                    // mode flag since we don't have a formal API for "desk mode".
                    if ((enableFlags&UiModeManager.ENABLE_CAR_MODE_GO_CAR_HOME) != 0) {
                        category = Intent.CATEGORY_DESK_DOCK;
                    }
                } else {
                    // Launch the standard home app if requested.
                    if ((disableFlags&UiModeManager.DISABLE_CAR_MODE_GO_HOME) != 0) {
                        category = Intent.CATEGORY_HOME;
                    }
                }
                
                if (category != null) {
                    // This is the new activity that will serve as home while
                    // we are in care mode.
                    Intent homeIntent = buildHomeIntent(category);
                    
                    // Now we are going to be careful about switching the
                    // configuration and starting the activity -- we need to
                    // do this in a specific order under control of the
                    // activity manager, to do it cleanly.  So compute the
                    // new config, but don't set it yet, and let the
                    // activity manager take care of both the start and config
                    // change.
                    Configuration newConfig = null;
                    if (mHoldingConfiguration) {
                        mHoldingConfiguration = false;
                        updateConfigurationLocked(false);
                        newConfig = mConfiguration;
                    }
                    try {
                        ActivityManagerNative.getDefault().startActivityWithConfig(
                                null, homeIntent, null, null, 0, null, null, 0, false, false,
                                newConfig);
                        mHoldingConfiguration = false;
                    } catch (RemoteException e) {
                        Slog.w(TAG, e.getCause());
                    }
                }

                if (mHoldingConfiguration) {
                    mHoldingConfiguration = false;
                    updateConfigurationLocked(true);
                }
            }
        }
    };

    private final BroadcastReceiver mTwilightUpdateReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            if (isDoingNightMode() && mNightMode == UiModeManager.MODE_NIGHT_AUTO) {
                mHandler.sendEmptyMessage(MSG_UPDATE_TWILIGHT);
            }
        }
    };

    private final BroadcastReceiver mDockModeReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            int state = intent.getIntExtra(Intent.EXTRA_DOCK_STATE,
                    Intent.EXTRA_DOCK_STATE_UNDOCKED);
            updateDockState(state);
        }
    };

    private final BroadcastReceiver mBatteryReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            mCharging = (intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, 0) != 0);
            synchronized (mLock) {
                if (mSystemReady) {
                    updateLocked(0, 0);
                }
            }
        }
    };

    private final BroadcastReceiver mUpdateLocationReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            if (Intent.ACTION_AIRPLANE_MODE_CHANGED.equals(intent.getAction())) {
                if (!intent.getBooleanExtra("state", false)) {
                    // Airplane mode is now off!
                    mHandler.sendEmptyMessage(MSG_GET_NEW_LOCATION_UPDATE);
                }
            } else {
                // Time zone has changed!
                mHandler.sendEmptyMessage(MSG_GET_NEW_LOCATION_UPDATE);
            }
        }
    };

    // A LocationListener to initialize the network location provider. The location updates
    // are handled through the passive location provider.
    private final LocationListener mEmptyLocationListener =  new LocationListener() {
        public void onLocationChanged(Location location) {
        }

        public void onProviderDisabled(String provider) {
        }

        public void onProviderEnabled(String provider) {
        }

        public void onStatusChanged(String provider, int status, Bundle extras) {
        }
    };

    private final LocationListener mLocationListener = new LocationListener() {

        public void onLocationChanged(Location location) {
            final boolean hasMoved = hasMoved(location);
            final boolean hasBetterAccuracy = mLocation == null
                    || location.getAccuracy() < mLocation.getAccuracy();
            if (hasMoved || hasBetterAccuracy) {
                synchronized (mLock) {
                    mLocation = location;
                    if (hasMoved && isDoingNightMode()
                            && mNightMode == UiModeManager.MODE_NIGHT_AUTO) {
                        mHandler.sendEmptyMessage(MSG_UPDATE_TWILIGHT);
                    }
                }
            }
        }

        public void onProviderDisabled(String provider) {
        }

        public void onProviderEnabled(String provider) {
        }

        public void onStatusChanged(String provider, int status, Bundle extras) {
        }

        /*
         * The user has moved if the accuracy circles of the two locations
         * don't overlap.
         */
        private boolean hasMoved(Location location) {
            if (location == null) {
                return false;
            }
            if (mLocation == null) {
                return true;
            }

            /* if new location is older than the current one, the devices hasn't
             * moved.
             */
            if (location.getTime() < mLocation.getTime()) {
                return false;
            }

            /* Get the distance between the two points */
            float distance = mLocation.distanceTo(location);

            /* Get the total accuracy radius for both locations */
            float totalAccuracy = mLocation.getAccuracy() + location.getAccuracy();

            /* If the distance is greater than the combined accuracy of the two
             * points then they can't overlap and hence the user has moved.
             */
            return distance >= totalAccuracy;
        }
    };

    public UiModeManagerService(Context context) {
        mContext = context;

        ServiceManager.addService(Context.UI_MODE_SERVICE, this);

        mAlarmManager =
            (AlarmManager)mContext.getSystemService(Context.ALARM_SERVICE);
        mLocationManager =
            (LocationManager)mContext.getSystemService(Context.LOCATION_SERVICE);
        mContext.registerReceiver(mTwilightUpdateReceiver,
                new IntentFilter(ACTION_UPDATE_NIGHT_MODE));
        mContext.registerReceiver(mDockModeReceiver,
                new IntentFilter(Intent.ACTION_DOCK_EVENT));
        mContext.registerReceiver(mBatteryReceiver,
                new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
        IntentFilter filter = new IntentFilter(Intent.ACTION_AIRPLANE_MODE_CHANGED);
        filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
        mContext.registerReceiver(mUpdateLocationReceiver, filter);

        PowerManager powerManager = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
        mWakeLock = powerManager.newWakeLock(PowerManager.FULL_WAKE_LOCK, TAG);

        mConfiguration.setToDefaults();

        mCarModeKeepsScreenOn = (context.getResources().getInteger(
                com.android.internal.R.integer.config_carDockKeepsScreenOn) == 1);
        mDeskModeKeepsScreenOn = (context.getResources().getInteger(
                com.android.internal.R.integer.config_deskDockKeepsScreenOn) == 1);
        
        mNightMode = Settings.Secure.getInt(mContext.getContentResolver(),
                Settings.Secure.UI_NIGHT_MODE, UiModeManager.MODE_NIGHT_AUTO);
    }

    public void disableCarMode(int flags) {
        synchronized (mLock) {
            setCarModeLocked(false);
            if (mSystemReady) {
                updateLocked(0, flags);
            }
        }
    }

    public void enableCarMode(int flags) {
        synchronized (mLock) {
            setCarModeLocked(true);
            if (mSystemReady) {
                updateLocked(flags, 0);
            }
        }
    }

    public int getCurrentModeType() {
        synchronized (mLock) {
            return mCurUiMode & Configuration.UI_MODE_TYPE_MASK;
        }
    }

    public void setNightMode(int mode) throws RemoteException {
        synchronized (mLock) {
            switch (mode) {
                case UiModeManager.MODE_NIGHT_NO:
                case UiModeManager.MODE_NIGHT_YES:
                case UiModeManager.MODE_NIGHT_AUTO:
                    break;
                default:
                    throw new IllegalArgumentException("Unknown mode: " + mode);
            }
            if (!isDoingNightMode()) {
                return;
            }

            if (mNightMode != mode) {
                long ident = Binder.clearCallingIdentity();
                Settings.Secure.putInt(mContext.getContentResolver(),
                        Settings.Secure.UI_NIGHT_MODE, mode);
                Binder.restoreCallingIdentity(ident);
                mNightMode = mode;
                updateLocked(0, 0);
            }
        }
    }

    public int getNightMode() throws RemoteException {
        return mNightMode;
    }

    void systemReady() {
        synchronized (mLock) {
            mSystemReady = true;
            mCarModeEnabled = mDockState == Intent.EXTRA_DOCK_STATE_CAR;
            updateLocked(0, 0);
            mHandler.sendEmptyMessage(MSG_ENABLE_LOCATION_UPDATES);
        }
    }

    boolean isDoingNightMode() {
        return mCarModeEnabled || mDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED;
    }

    void setCarModeLocked(boolean enabled) {
        if (mCarModeEnabled != enabled) {
            mCarModeEnabled = enabled;
        }
    }

    void updateDockState(int newState) {
        synchronized (mLock) {
            if (newState != mDockState) {
                mDockState = newState;
                setCarModeLocked(mDockState == Intent.EXTRA_DOCK_STATE_CAR);
                if (mSystemReady) {
                    updateLocked(UiModeManager.ENABLE_CAR_MODE_GO_CAR_HOME, 0);
                }
            }
        }
    }

    final void updateConfigurationLocked(boolean sendIt) {
        int uiMode = Configuration.UI_MODE_TYPE_NORMAL;
        if (mCarModeEnabled) {
            uiMode = Configuration.UI_MODE_TYPE_CAR;
        } else if (mDockState == Intent.EXTRA_DOCK_STATE_DESK) {
            uiMode = Configuration.UI_MODE_TYPE_DESK;
        }
        if (mCarModeEnabled) {
            if (mNightMode == UiModeManager.MODE_NIGHT_AUTO) {
                updateTwilightLocked();
                uiMode |= mComputedNightMode ? Configuration.UI_MODE_NIGHT_YES
                        : Configuration.UI_MODE_NIGHT_NO;
            } else {
                uiMode |= mNightMode << 4;
            }
        } else {
            // Disabling the car mode clears the night mode.
            uiMode = (uiMode & ~Configuration.UI_MODE_NIGHT_MASK) | Configuration.UI_MODE_NIGHT_NO;
        }

        if (LOG) {
            Slog.d(TAG, 
                "updateConfigurationLocked: mDockState=" + mDockState 
                + "; mCarMode=" + mCarModeEnabled
                + "; mNightMode=" + mNightMode
                + "; uiMode=" + uiMode);
        }

        mCurUiMode = uiMode;

        if (!mHoldingConfiguration && uiMode != mSetUiMode) {
            mSetUiMode = uiMode;
            mConfiguration.uiMode = uiMode;

            if (sendIt) {
                try {
                    ActivityManagerNative.getDefault().updateConfiguration(mConfiguration);
                } catch (RemoteException e) {
                    Slog.w(TAG, "Failure communicating with activity manager", e);
                }
            }
        }
    }

    final void updateLocked(int enableFlags, int disableFlags) {
        long ident = Binder.clearCallingIdentity();

        try {
            String action = null;
            String oldAction = null;
            if (mLastBroadcastState == Intent.EXTRA_DOCK_STATE_CAR) {
                adjustStatusBarCarModeLocked();
                oldAction = UiModeManager.ACTION_EXIT_CAR_MODE;
            } else if (mLastBroadcastState == Intent.EXTRA_DOCK_STATE_DESK) {
                oldAction = UiModeManager.ACTION_EXIT_DESK_MODE;
            }

            if (mCarModeEnabled) {
                if (mLastBroadcastState != Intent.EXTRA_DOCK_STATE_CAR) {
                    adjustStatusBarCarModeLocked();

                    if (oldAction != null) {
                        mContext.sendBroadcast(new Intent(oldAction));
                    }
                    mLastBroadcastState = Intent.EXTRA_DOCK_STATE_CAR;
                    action = UiModeManager.ACTION_ENTER_CAR_MODE;
                }
            } else if (mDockState == Intent.EXTRA_DOCK_STATE_DESK) {
                if (mLastBroadcastState != Intent.EXTRA_DOCK_STATE_DESK) {
                    if (oldAction != null) {
                        mContext.sendBroadcast(new Intent(oldAction));
                    }
                    mLastBroadcastState = Intent.EXTRA_DOCK_STATE_DESK;
                    action = UiModeManager.ACTION_ENTER_DESK_MODE;
                }
            } else {
                mLastBroadcastState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
                action = oldAction;
            }

            if (action != null) {
                // Send the ordered broadcast; the result receiver will receive after all
                // broadcasts have been sent. If any broadcast receiver changes the result
                // code from the initial value of RESULT_OK, then the result receiver will
                // not launch the corresponding dock application. This gives apps a chance
                // to override the behavior and stay in their app even when the device is
                // placed into a dock.
                Intent intent = new Intent(action);
                intent.putExtra("enableFlags", enableFlags);
                intent.putExtra("disableFlags", disableFlags);
                mContext.sendOrderedBroadcast(intent, null,
                        mResultReceiver, null, Activity.RESULT_OK, null, null);
                // Attempting to make this transition a little more clean, we are going
                // to hold off on doing a configuration change until we have finished
                // the broadcast and started the home activity.
                mHoldingConfiguration = true;
            } else {
                Intent homeIntent = null;
                if (mCarModeEnabled) {
                    if ((enableFlags&UiModeManager.ENABLE_CAR_MODE_GO_CAR_HOME) != 0) {
                        homeIntent = buildHomeIntent(Intent.CATEGORY_CAR_DOCK);
                    }
                } else if (mDockState == Intent.EXTRA_DOCK_STATE_DESK) {
                    if ((enableFlags&UiModeManager.ENABLE_CAR_MODE_GO_CAR_HOME) != 0) {
                        homeIntent = buildHomeIntent(Intent.CATEGORY_DESK_DOCK);
                    }
                } else {
                    if ((disableFlags&UiModeManager.DISABLE_CAR_MODE_GO_HOME) != 0) {
                        homeIntent = buildHomeIntent(Intent.CATEGORY_HOME);
                    }
                }
                if (homeIntent != null) {
                    try {
                        mContext.startActivity(homeIntent);
                    } catch (ActivityNotFoundException e) {
                    }
                }
            }

            updateConfigurationLocked(true);

            // keep screen on when charging and in car mode
            boolean keepScreenOn = mCharging &&
                    ((mCarModeEnabled && mCarModeKeepsScreenOn) ||
                     (mCurUiMode == Configuration.UI_MODE_TYPE_DESK && mDeskModeKeepsScreenOn));
            if (keepScreenOn != mWakeLock.isHeld()) {
                if (keepScreenOn) {
                    mWakeLock.acquire();
                } else {
                    mWakeLock.release();
                }
            }
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
    }

    private void adjustStatusBarCarModeLocked() {
        if (mStatusBarManager == null) {
            mStatusBarManager = (StatusBarManager) mContext.getSystemService(Context.STATUS_BAR_SERVICE);
        }

        // Fear not: StatusBarService manages a list of requests to disable
        // features of the status bar; these are ORed together to form the
        // active disabled list. So if (for example) the device is locked and
        // the status bar should be totally disabled, the calls below will
        // have no effect until the device is unlocked.
        if (mStatusBarManager != null) {
            mStatusBarManager.disable(mCarModeEnabled
                ? StatusBarManager.DISABLE_NOTIFICATION_TICKER
                : StatusBarManager.DISABLE_NONE);
        }

        if (mNotificationManager == null) {
            mNotificationManager = (NotificationManager)
                    mContext.getSystemService(Context.NOTIFICATION_SERVICE);
        }

        if (mNotificationManager != null) {
            if (mCarModeEnabled) {
                Intent carModeOffIntent = new Intent(mContext, DisableCarModeActivity.class);

                Notification n = new Notification();
                n.icon = R.drawable.stat_notify_car_mode;
                n.defaults = Notification.DEFAULT_LIGHTS;
                n.flags = Notification.FLAG_ONGOING_EVENT;
                n.when = 0;
                n.setLatestEventInfo(
                        mContext,
                        mContext.getString(R.string.car_mode_disable_notification_title),
                        mContext.getString(R.string.car_mode_disable_notification_message),
                        PendingIntent.getActivity(mContext, 0, carModeOffIntent, 0));
                mNotificationManager.notify(0, n);
            } else {
                mNotificationManager.cancel(0);
            }
        }
    }

    private final Handler mHandler = new Handler() {

        boolean mPassiveListenerEnabled;
        boolean mNetworkListenerEnabled;
        boolean mDidFirstInit;
        long mLastNetworkRegisterTime = -MIN_LOCATION_UPDATE_MS;
        
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case MSG_UPDATE_TWILIGHT:
                    synchronized (mLock) {
                        if (isDoingNightMode() && mLocation != null
                                && mNightMode == UiModeManager.MODE_NIGHT_AUTO) {
                            updateTwilightLocked();
                            updateLocked(0, 0);
                        }
                    }
                    break;
                case MSG_GET_NEW_LOCATION_UPDATE:
                    if (!mNetworkListenerEnabled) {
                        // Don't do anything -- we are still trying to get a
                        // location.
                        return;
                    }
                    if ((mLastNetworkRegisterTime+MIN_LOCATION_UPDATE_MS)
                            >= SystemClock.elapsedRealtime()) {
                        // Don't do anything -- it hasn't been long enough
                        // since we last requested an update.
                        return;
                    }
                    
                    // Unregister the current location monitor, so we can
                    // register a new one for it to get an immediate update.
                    mNetworkListenerEnabled = false;
                    mLocationManager.removeUpdates(mEmptyLocationListener);
                    
                    // Fall through to re-register listener.
                case MSG_ENABLE_LOCATION_UPDATES:
                    // enable network provider to receive at least location updates for a given
                    // distance.
                    boolean networkLocationEnabled;
                    try {
                        networkLocationEnabled =
                            mLocationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
                    } catch (Exception e) {
                        // we may get IllegalArgumentException if network location provider
                        // does not exist or is not yet installed.
                        networkLocationEnabled = false;
                    }
                    if (!mNetworkListenerEnabled && networkLocationEnabled) {
                        mNetworkListenerEnabled = true;
                        mLastNetworkRegisterTime = SystemClock.elapsedRealtime();
                        mLocationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,
                                LOCATION_UPDATE_MS, 0, mEmptyLocationListener);

                        if (!mDidFirstInit) {
                            mDidFirstInit = true;
                            if (mLocation == null) {
                                retrieveLocation();
                            }
                            synchronized (mLock) {
                                if (isDoingNightMode() && mLocation != null
                                        && mNightMode == UiModeManager.MODE_NIGHT_AUTO) {
                                    updateTwilightLocked();
                                    updateLocked(0, 0);
                                }
                            }
                        }
                    }
                   // enable passive provider to receive updates from location fixes (gps
                   // and network).
                   boolean passiveLocationEnabled;
                    try {
                        passiveLocationEnabled =
                            mLocationManager.isProviderEnabled(LocationManager.PASSIVE_PROVIDER);
                    } catch (Exception e) {
                        // we may get IllegalArgumentException if passive location provider
                        // does not exist or is not yet installed.
                        passiveLocationEnabled = false;
                    }
                    if (!mPassiveListenerEnabled && passiveLocationEnabled) {
                        mPassiveListenerEnabled = true;
                        mLocationManager.requestLocationUpdates(LocationManager.PASSIVE_PROVIDER,
                                0, LOCATION_UPDATE_DISTANCE_METER , mLocationListener);
                    }
                    if (!(mNetworkListenerEnabled && mPassiveListenerEnabled)) {
                        long interval = msg.getData().getLong(KEY_LAST_UPDATE_INTERVAL);
                        interval *= 1.5;
                        if (interval == 0) {
                            interval = LOCATION_UPDATE_ENABLE_INTERVAL_MIN;
                        } else if (interval > LOCATION_UPDATE_ENABLE_INTERVAL_MAX) {
                            interval = LOCATION_UPDATE_ENABLE_INTERVAL_MAX;
                        }
                        Bundle bundle = new Bundle();
                        bundle.putLong(KEY_LAST_UPDATE_INTERVAL, interval);
                        Message newMsg = mHandler.obtainMessage(MSG_ENABLE_LOCATION_UPDATES);
                        newMsg.setData(bundle);
                        mHandler.sendMessageDelayed(newMsg, interval);
                    }
                    break;
            }
        }

        private void retrieveLocation() {
            Location location = null;
            final Iterator<String> providers =
                    mLocationManager.getProviders(new Criteria(), true).iterator();
            while (providers.hasNext()) {
                final Location lastKnownLocation =
                        mLocationManager.getLastKnownLocation(providers.next());
                // pick the most recent location
                if (location == null || (lastKnownLocation != null &&
                        location.getTime() < lastKnownLocation.getTime())) {
                    location = lastKnownLocation;
                }
            }
            // In the case there is no location available (e.g. GPS fix or network location
            // is not available yet), the longitude of the location is estimated using the timezone,
            // latitude and accuracy are set to get a good average.
            if (location == null) {
                Time currentTime = new Time();
                currentTime.set(System.currentTimeMillis());
                double lngOffset = FACTOR_GMT_OFFSET_LONGITUDE *
                        (currentTime.gmtoff - (currentTime.isDst > 0 ? 3600 : 0));
                location = new Location("fake");
                location.setLongitude(lngOffset);
                location.setLatitude(0);
                location.setAccuracy(417000.0f);
                location.setTime(System.currentTimeMillis());
            }
            synchronized (mLock) {
                mLocation = location;
            }
        }
    };

    void updateTwilightLocked() {
        if (mLocation == null) {
            return;
        }
        final long currentTime = System.currentTimeMillis();
        boolean nightMode;
        // calculate current twilight
        TwilightCalculator tw = new TwilightCalculator();
        tw.calculateTwilight(currentTime,
                mLocation.getLatitude(), mLocation.getLongitude());
        if (tw.mState == TwilightCalculator.DAY) {
            nightMode = false;
        } else {
            nightMode = true;
        }

        // schedule next update
        long nextUpdate = 0;
        if (tw.mSunrise == -1 || tw.mSunset == -1) {
            // In the case the day or night never ends the update is scheduled 12 hours later.
            nextUpdate = currentTime + 12 * DateUtils.HOUR_IN_MILLIS;
        } else {
            final int mLastTwilightState = tw.mState;
            // add some extra time to be on the save side.
            nextUpdate += DateUtils.MINUTE_IN_MILLIS;
            if (currentTime > tw.mSunset) {
                // next update should be on the following day
                tw.calculateTwilight(currentTime
                        + DateUtils.DAY_IN_MILLIS, mLocation.getLatitude(),
                        mLocation.getLongitude());
            }

            if (mLastTwilightState == TwilightCalculator.NIGHT) {
                nextUpdate += tw.mSunrise;
            } else {
                nextUpdate += tw.mSunset;
            }
        }

        Intent updateIntent = new Intent(ACTION_UPDATE_NIGHT_MODE);
        PendingIntent pendingIntent =
                PendingIntent.getBroadcast(mContext, 0, updateIntent, 0);
        mAlarmManager.cancel(pendingIntent);
        mAlarmManager.set(AlarmManager.RTC_WAKEUP, nextUpdate, pendingIntent);

        mComputedNightMode = nightMode;
    }

    @Override
    protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
        if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP)
                != PackageManager.PERMISSION_GRANTED) {

            pw.println("Permission Denial: can't dump uimode service from from pid="
                    + Binder.getCallingPid()
                    + ", uid=" + Binder.getCallingUid());
            return;
        }

        synchronized (mLock) {
            pw.println("Current UI Mode Service state:");
            pw.print("  mDockState="); pw.print(mDockState);
                    pw.print(" mLastBroadcastState="); pw.println(mLastBroadcastState);
            pw.print("  mNightMode="); pw.print(mNightMode);
                    pw.print(" mCarModeEnabled="); pw.print(mCarModeEnabled);
                    pw.print(" mComputedNightMode="); pw.println(mComputedNightMode);
            pw.print("  mCurUiMode=0x"); pw.print(Integer.toHexString(mCurUiMode));
                    pw.print(" mSetUiMode=0x"); pw.println(Integer.toHexString(mSetUiMode));
            pw.print("  mHoldingConfiguration="); pw.print(mHoldingConfiguration);
                    pw.print(" mSystemReady="); pw.println(mSystemReady);
            if (mLocation != null) {
                pw.print("  mLocation="); pw.println(mLocation);
            }
        }
    }
}

Other Android examples (source code examples)

Here is a short list of links related to this Android UiModeManagerService.java source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.