/*
* Copyright (C) 2009 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.widget;
import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.bluetooth.BluetoothAdapter;
import android.content.ComponentName;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.SyncStorageEngine;
import android.content.pm.PackageManager;
import android.database.ContentObserver;
import android.location.LocationManager;
import android.net.ConnectivityManager;
import android.net.Uri;
import android.net.wifi.WifiManager;
import android.os.AsyncTask;
import android.os.Handler;
import android.os.IPowerManager;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.provider.Settings;
import android.util.Log;
import android.widget.RemoteViews;
import com.android.settings.R;
import com.android.settings.bluetooth.LocalBluetoothAdapter;
import com.android.settings.bluetooth.LocalBluetoothManager;
/**
* Provides control of power-related settings from a widget.
*/
public class SettingsAppWidgetProvider extends AppWidgetProvider {
static final String TAG = "SettingsAppWidgetProvider";
static final ComponentName THIS_APPWIDGET =
new ComponentName("com.android.settings",
"com.android.settings.widget.SettingsAppWidgetProvider");
private static LocalBluetoothAdapter sLocalBluetoothAdapter = null;
private static final int BUTTON_WIFI = 0;
private static final int BUTTON_BRIGHTNESS = 1;
private static final int BUTTON_SYNC = 2;
private static final int BUTTON_GPS = 3;
private static final int BUTTON_BLUETOOTH = 4;
// This widget keeps track of two sets of states:
// "3-state": STATE_DISABLED, STATE_ENABLED, STATE_INTERMEDIATE
// "5-state": STATE_DISABLED, STATE_ENABLED, STATE_TURNING_ON, STATE_TURNING_OFF, STATE_UNKNOWN
private static final int STATE_DISABLED = 0;
private static final int STATE_ENABLED = 1;
private static final int STATE_TURNING_ON = 2;
private static final int STATE_TURNING_OFF = 3;
private static final int STATE_UNKNOWN = 4;
private static final int STATE_INTERMEDIATE = 5;
// Position in the widget bar, to enable different graphics for left, center and right buttons
private static final int POS_LEFT = 0;
private static final int POS_CENTER = 1;
private static final int POS_RIGHT = 2;
private static final int[] IND_DRAWABLE_OFF = {
R.drawable.appwidget_settings_ind_off_l_holo,
R.drawable.appwidget_settings_ind_off_c_holo,
R.drawable.appwidget_settings_ind_off_r_holo
};
private static final int[] IND_DRAWABLE_MID = {
R.drawable.appwidget_settings_ind_mid_l_holo,
R.drawable.appwidget_settings_ind_mid_c_holo,
R.drawable.appwidget_settings_ind_mid_r_holo
};
private static final int[] IND_DRAWABLE_ON = {
R.drawable.appwidget_settings_ind_on_l_holo,
R.drawable.appwidget_settings_ind_on_c_holo,
R.drawable.appwidget_settings_ind_on_r_holo
};
/**
* Minimum and maximum brightnesses. Don't go to 0 since that makes the display unusable
*/
private static final int MINIMUM_BACKLIGHT = android.os.Power.BRIGHTNESS_DIM + 10;
private static final int MAXIMUM_BACKLIGHT = android.os.Power.BRIGHTNESS_ON;
private static final int DEFAULT_BACKLIGHT = (int) (android.os.Power.BRIGHTNESS_ON * 0.4f);
/** Minimum brightness at which the indicator is shown at half-full and ON */
private static final int HALF_BRIGHTNESS_THRESHOLD = (int) (0.3 * MAXIMUM_BACKLIGHT);
/** Minimum brightness at which the indicator is shown at full */
private static final int FULL_BRIGHTNESS_THRESHOLD = (int) (0.8 * MAXIMUM_BACKLIGHT);
private static final StateTracker sWifiState = new WifiStateTracker();
private static final StateTracker sBluetoothState = new BluetoothStateTracker();
private static final StateTracker sGpsState = new GpsStateTracker();
private static final StateTracker sSyncState = new SyncStateTracker();
private static SettingsObserver sSettingsObserver;
/**
* The state machine for a setting's toggling, tracking reality
* versus the user's intent.
*
* This is necessary because reality moves relatively slowly
* (turning on & off radio drivers), compared to user's
* expectations.
*/
private abstract static class StateTracker {
// Is the state in the process of changing?
private boolean mInTransition = false;
private Boolean mActualState = null; // initially not set
private Boolean mIntendedState = null; // initially not set
// Did a toggle request arrive while a state update was
// already in-flight? If so, the mIntendedState needs to be
// requested when the other one is done, unless we happened to
// arrive at that state already.
private boolean mDeferredStateChangeRequestNeeded = false;
/**
* User pressed a button to change the state. Something
* should immediately appear to the user afterwards, even if
* we effectively do nothing. Their press must be heard.
*/
public final void toggleState(Context context) {
int currentState = getTriState(context);
boolean newState = false;
switch (currentState) {
case STATE_ENABLED:
newState = false;
break;
case STATE_DISABLED:
newState = true;
break;
case STATE_INTERMEDIATE:
if (mIntendedState != null) {
newState = !mIntendedState;
}
break;
}
mIntendedState = newState;
if (mInTransition) {
// We don't send off a transition request if we're
// already transitioning. Makes our state tracking
// easier, and is probably nicer on lower levels.
// (even though they should be able to take it...)
mDeferredStateChangeRequestNeeded = true;
} else {
mInTransition = true;
requestStateChange(context, newState);
}
}
/**
* Return the ID of the main large image button for the setting.
*/
public abstract int getButtonId();
/**
* Returns the small indicator image ID underneath the setting.
*/
public abstract int getIndicatorId();
/**
* Returns the resource ID of the image to show as a function of
* the on-vs-off state.
*/
public abstract int getButtonImageId(boolean on);
/**
* Returns the position in the button bar - either POS_LEFT, POS_RIGHT or POS_CENTER.
*/
public int getPosition() { return POS_CENTER; }
/**
* Updates the remote views depending on the state (off, on,
* turning off, turning on) of the setting.
*/
public final void setImageViewResources(Context context, RemoteViews views) {
int buttonId = getButtonId();
int indicatorId = getIndicatorId();
int pos = getPosition();
switch (getTriState(context)) {
case STATE_DISABLED:
views.setImageViewResource(buttonId, getButtonImageId(false));
views.setImageViewResource(
indicatorId, IND_DRAWABLE_OFF[pos]);
break;
case STATE_ENABLED:
views.setImageViewResource(buttonId, getButtonImageId(true));
views.setImageViewResource(
indicatorId, IND_DRAWABLE_ON[pos]);
break;
case STATE_INTERMEDIATE:
// In the transitional state, the bottom green bar
// shows the tri-state (on, off, transitioning), but
// the top dark-gray-or-bright-white logo shows the
// user's intent. This is much easier to see in
// sunlight.
if (isTurningOn()) {
views.setImageViewResource(buttonId, getButtonImageId(true));
views.setImageViewResource(
indicatorId, IND_DRAWABLE_MID[pos]);
} else {
views.setImageViewResource(buttonId, getButtonImageId(false));
views.setImageViewResource(
indicatorId, IND_DRAWABLE_OFF[pos]);
}
break;
}
}
/**
* Update internal state from a broadcast state change.
*/
public abstract void onActualStateChange(Context context, Intent intent);
/**
* Sets the value that we're now in. To be called from onActualStateChange.
*
* @param newState one of STATE_DISABLED, STATE_ENABLED, STATE_TURNING_ON,
* STATE_TURNING_OFF, STATE_UNKNOWN
*/
protected final void setCurrentState(Context context, int newState) {
final boolean wasInTransition = mInTransition;
switch (newState) {
case STATE_DISABLED:
mInTransition = false;
mActualState = false;
break;
case STATE_ENABLED:
mInTransition = false;
mActualState = true;
break;
case STATE_TURNING_ON:
mInTransition = true;
mActualState = false;
break;
case STATE_TURNING_OFF:
mInTransition = true;
mActualState = true;
break;
}
if (wasInTransition && !mInTransition) {
if (mDeferredStateChangeRequestNeeded) {
Log.v(TAG, "processing deferred state change");
if (mActualState != null && mIntendedState != null &&
mIntendedState.equals(mActualState)) {
Log.v(TAG, "... but intended state matches, so no changes.");
} else if (mIntendedState != null) {
mInTransition = true;
requestStateChange(context, mIntendedState);
}
mDeferredStateChangeRequestNeeded = false;
}
}
}
/**
* If we're in a transition mode, this returns true if we're
* transitioning towards being enabled.
*/
public final boolean isTurningOn() {
return mIntendedState != null && mIntendedState;
}
/**
* Returns simplified 3-state value from underlying 5-state.
*
* @param context
* @return STATE_ENABLED, STATE_DISABLED, or STATE_INTERMEDIATE
*/
public final int getTriState(Context context) {
if (mInTransition) {
// If we know we just got a toggle request recently
// (which set mInTransition), don't even ask the
// underlying interface for its state. We know we're
// changing. This avoids blocking the UI thread
// during UI refresh post-toggle if the underlying
// service state accessor has coarse locking on its
// state (to be fixed separately).
return STATE_INTERMEDIATE;
}
switch (getActualState(context)) {
case STATE_DISABLED:
return STATE_DISABLED;
case STATE_ENABLED:
return STATE_ENABLED;
default:
return STATE_INTERMEDIATE;
}
}
/**
* Gets underlying actual state.
*
* @param context
* @return STATE_ENABLED, STATE_DISABLED, STATE_ENABLING, STATE_DISABLING,
* or or STATE_UNKNOWN.
*/
public abstract int getActualState(Context context);
/**
* Actually make the desired change to the underlying radio
* API.
*/
protected abstract void requestStateChange(Context context, boolean desiredState);
}
/**
* Subclass of StateTracker to get/set Wifi state.
*/
private static final class WifiStateTracker extends StateTracker {
public int getButtonId() { return R.id.img_wifi; }
public int getIndicatorId() { return R.id.ind_wifi; }
public int getButtonImageId(boolean on) {
return on ? R.drawable.ic_appwidget_settings_wifi_on_holo
: R.drawable.ic_appwidget_settings_wifi_off_holo;
}
@Override
public int getPosition() { return POS_LEFT; }
@Override
public int getActualState(Context context) {
WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
if (wifiManager != null) {
return wifiStateToFiveState(wifiManager.getWifiState());
}
return STATE_UNKNOWN;
}
@Override
protected void requestStateChange(Context context, final boolean desiredState) {
final WifiManager wifiManager =
(WifiManager) context.getSystemService(Context.WIFI_SERVICE);
if (wifiManager == null) {
Log.d(TAG, "No wifiManager.");
return;
}
// Actually request the wifi change and persistent
// settings write off the UI thread, as it can take a
// user-noticeable amount of time, especially if there's
// disk contention.
new AsyncTask<Void, Void, Void>() {
@Override
protected Void doInBackground(Void... args) {
/**
* Disable tethering if enabling Wifi
*/
int wifiApState = wifiManager.getWifiApState();
if (desiredState && ((wifiApState == WifiManager.WIFI_AP_STATE_ENABLING) ||
(wifiApState == WifiManager.WIFI_AP_STATE_ENABLED))) {
wifiManager.setWifiApEnabled(null, false);
}
wifiManager.setWifiEnabled(desiredState);
return null;
}
}.execute();
}
@Override
public void onActualStateChange(Context context, Intent intent) {
if (!WifiManager.WIFI_STATE_CHANGED_ACTION.equals(intent.getAction())) {
return;
}
int wifiState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, -1);
setCurrentState(context, wifiStateToFiveState(wifiState));
}
/**
* Converts WifiManager's state values into our
* Wifi/Bluetooth-common state values.
*/
private static int wifiStateToFiveState(int wifiState) {
switch (wifiState) {
case WifiManager.WIFI_STATE_DISABLED:
return STATE_DISABLED;
case WifiManager.WIFI_STATE_ENABLED:
return STATE_ENABLED;
case WifiManager.WIFI_STATE_DISABLING:
return STATE_TURNING_OFF;
case WifiManager.WIFI_STATE_ENABLING:
return STATE_TURNING_ON;
default:
return STATE_UNKNOWN;
}
}
}
/**
* Subclass of StateTracker to get/set Bluetooth state.
*/
private static final class BluetoothStateTracker extends StateTracker {
public int getButtonId() { return R.id.img_bluetooth; }
public int getIndicatorId() { return R.id.ind_bluetooth; }
public int getButtonImageId(boolean on) {
return on ? R.drawable.ic_appwidget_settings_bluetooth_on_holo
: R.drawable.ic_appwidget_settings_bluetooth_off_holo;
}
@Override
public int getActualState(Context context) {
if (sLocalBluetoothAdapter == null) {
LocalBluetoothManager manager = LocalBluetoothManager.getInstance(context);
if (manager == null) {
return STATE_UNKNOWN; // On emulator?
}
sLocalBluetoothAdapter = manager.getBluetoothAdapter();
}
return bluetoothStateToFiveState(sLocalBluetoothAdapter.getBluetoothState());
}
@Override
protected void requestStateChange(Context context, final boolean desiredState) {
if (sLocalBluetoothAdapter == null) {
Log.d(TAG, "No LocalBluetoothManager");
return;
}
// Actually request the Bluetooth change and persistent
// settings write off the UI thread, as it can take a
// user-noticeable amount of time, especially if there's
// disk contention.
new AsyncTask<Void, Void, Void>() {
@Override
protected Void doInBackground(Void... args) {
sLocalBluetoothAdapter.setBluetoothEnabled(desiredState);
return null;
}
}.execute();
}
@Override
public void onActualStateChange(Context context, Intent intent) {
if (!BluetoothAdapter.ACTION_STATE_CHANGED.equals(intent.getAction())) {
return;
}
int bluetoothState = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, -1);
setCurrentState(context, bluetoothStateToFiveState(bluetoothState));
}
/**
* Converts BluetoothAdapter's state values into our
* Wifi/Bluetooth-common state values.
*/
private static int bluetoothStateToFiveState(int bluetoothState) {
switch (bluetoothState) {
case BluetoothAdapter.STATE_OFF:
return STATE_DISABLED;
case BluetoothAdapter.STATE_ON:
return STATE_ENABLED;
case BluetoothAdapter.STATE_TURNING_ON:
return STATE_TURNING_ON;
case BluetoothAdapter.STATE_TURNING_OFF:
return STATE_TURNING_OFF;
default:
return STATE_UNKNOWN;
}
}
}
/**
* Subclass of StateTracker for GPS state.
*/
private static final class GpsStateTracker extends StateTracker {
public int getButtonId() { return R.id.img_gps; }
public int getIndicatorId() { return R.id.ind_gps; }
public int getButtonImageId(boolean on) {
return on ? R.drawable.ic_appwidget_settings_gps_on_holo
: R.drawable.ic_appwidget_settings_gps_off_holo;
}
@Override
public int getActualState(Context context) {
ContentResolver resolver = context.getContentResolver();
boolean on = Settings.Secure.isLocationProviderEnabled(
resolver, LocationManager.GPS_PROVIDER);
return on ? STATE_ENABLED : STATE_DISABLED;
}
@Override
public void onActualStateChange(Context context, Intent unused) {
// Note: the broadcast location providers changed intent
// doesn't include an extras bundles saying what the new value is.
setCurrentState(context, getActualState(context));
}
@Override
public void requestStateChange(final Context context, final boolean desiredState) {
final ContentResolver resolver = context.getContentResolver();
new AsyncTask<Void, Void, Boolean>() {
@Override
protected Boolean doInBackground(Void... args) {
Settings.Secure.setLocationProviderEnabled(
resolver,
LocationManager.GPS_PROVIDER,
desiredState);
return desiredState;
}
@Override
protected void onPostExecute(Boolean result) {
setCurrentState(
context,
result ? STATE_ENABLED : STATE_DISABLED);
updateWidget(context);
}
}.execute();
}
}
/**
* Subclass of StateTracker for sync state.
*/
private static final class SyncStateTracker extends StateTracker {
public int getButtonId() { return R.id.img_sync; }
public int getIndicatorId() { return R.id.ind_sync; }
public int getButtonImageId(boolean on) {
return on ? R.drawable.ic_appwidget_settings_sync_on_holo
: R.drawable.ic_appwidget_settings_sync_off_holo;
}
@Override
public int getActualState(Context context) {
boolean on = ContentResolver.getMasterSyncAutomatically();
return on ? STATE_ENABLED : STATE_DISABLED;
}
@Override
public void onActualStateChange(Context context, Intent unused) {
setCurrentState(context, getActualState(context));
}
@Override
public void requestStateChange(final Context context, final boolean desiredState) {
final ConnectivityManager connManager =
(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
final boolean sync = ContentResolver.getMasterSyncAutomatically();
new AsyncTask<Void, Void, Boolean>() {
@Override
protected Boolean doInBackground(Void... args) {
// Turning sync on.
if (desiredState) {
if (!sync) {
ContentResolver.setMasterSyncAutomatically(true);
}
return true;
}
// Turning sync off
if (sync) {
ContentResolver.setMasterSyncAutomatically(false);
}
return false;
}
@Override
protected void onPostExecute(Boolean result) {
setCurrentState(
context,
result ? STATE_ENABLED : STATE_DISABLED);
updateWidget(context);
}
}.execute();
}
}
private static void checkObserver(Context context) {
if (sSettingsObserver == null) {
sSettingsObserver = new SettingsObserver(new Handler(),
context.getApplicationContext());
sSettingsObserver.startObserving();
}
}
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager,
int[] appWidgetIds) {
// Update each requested appWidgetId
RemoteViews view = buildUpdate(context);
for (int i = 0; i < appWidgetIds.length; i++) {
appWidgetManager.updateAppWidget(appWidgetIds[i], view);
}
}
@Override
public void onEnabled(Context context) {
PackageManager pm = context.getPackageManager();
pm.setComponentEnabledSetting(
new ComponentName("com.android.settings", ".widget.SettingsAppWidgetProvider"),
PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
PackageManager.DONT_KILL_APP);
checkObserver(context);
}
@Override
public void onDisabled(Context context) {
Class clazz = com.android.settings.widget.SettingsAppWidgetProvider.class;
PackageManager pm = context.getPackageManager();
pm.setComponentEnabledSetting(
new ComponentName("com.android.settings", ".widget.SettingsAppWidgetProvider"),
PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
PackageManager.DONT_KILL_APP);
if (sSettingsObserver != null) {
sSettingsObserver.stopObserving();
sSettingsObserver = null;
}
}
/**
* Load image for given widget and build {@link RemoteViews} for it.
*/
static RemoteViews buildUpdate(Context context) {
RemoteViews views = new RemoteViews(context.getPackageName(),
R.layout.widget);
views.setOnClickPendingIntent(R.id.btn_wifi, getLaunchPendingIntent(context,
BUTTON_WIFI));
views.setOnClickPendingIntent(R.id.btn_brightness,
getLaunchPendingIntent(context,
BUTTON_BRIGHTNESS));
views.setOnClickPendingIntent(R.id.btn_sync,
getLaunchPendingIntent(context,
BUTTON_SYNC));
views.setOnClickPendingIntent(R.id.btn_gps,
getLaunchPendingIntent(context, BUTTON_GPS));
views.setOnClickPendingIntent(R.id.btn_bluetooth,
getLaunchPendingIntent(context,
BUTTON_BLUETOOTH));
updateButtons(views, context);
return views;
}
/**
* Updates the widget when something changes, or when a button is pushed.
*
* @param context
*/
public static void updateWidget(Context context) {
RemoteViews views = buildUpdate(context);
// Update specific list of appWidgetIds if given, otherwise default to all
final AppWidgetManager gm = AppWidgetManager.getInstance(context);
gm.updateAppWidget(THIS_APPWIDGET, views);
checkObserver(context);
}
/**
* Updates the buttons based on the underlying states of wifi, etc.
*
* @param views The RemoteViews to update.
* @param context
*/
private static void updateButtons(RemoteViews views, Context context) {
sWifiState.setImageViewResources(context, views);
sBluetoothState.setImageViewResources(context, views);
sGpsState.setImageViewResources(context, views);
sSyncState.setImageViewResources(context, views);
if (getBrightnessMode(context)) {
views.setImageViewResource(R.id.img_brightness,
R.drawable.ic_appwidget_settings_brightness_auto_holo);
views.setImageViewResource(R.id.ind_brightness,
R.drawable.appwidget_settings_ind_on_r_holo);
} else {
final int brightness = getBrightness(context);
// Set the icon
if (brightness > FULL_BRIGHTNESS_THRESHOLD) {
views.setImageViewResource(R.id.img_brightness,
R.drawable.ic_appwidget_settings_brightness_full_holo);
} else if (brightness > HALF_BRIGHTNESS_THRESHOLD) {
views.setImageViewResource(R.id.img_brightness,
R.drawable.ic_appwidget_settings_brightness_half_holo);
} else {
views.setImageViewResource(R.id.img_brightness,
R.drawable.ic_appwidget_settings_brightness_off_holo);
}
// Set the ON state
if (brightness > HALF_BRIGHTNESS_THRESHOLD) {
views.setImageViewResource(R.id.ind_brightness,
R.drawable.appwidget_settings_ind_on_r_holo);
} else {
views.setImageViewResource(R.id.ind_brightness,
R.drawable.appwidget_settings_ind_off_r_holo);
}
}
}
/**
* Creates PendingIntent to notify the widget of a button click.
*
* @param context
* @return
*/
private static PendingIntent getLaunchPendingIntent(Context context,
int buttonId) {
Intent launchIntent = new Intent();
launchIntent.setClass(context, SettingsAppWidgetProvider.class);
launchIntent.addCategory(Intent.CATEGORY_ALTERNATIVE);
launchIntent.setData(Uri.parse("custom:" + buttonId));
PendingIntent pi = PendingIntent.getBroadcast(context, 0 /* no requestCode */,
launchIntent, 0 /* no flags */);
return pi;
}
/**
* Receives and processes a button pressed intent or state change.
*
* @param context
* @param intent Indicates the pressed button.
*/
@Override
public void onReceive(Context context, Intent intent) {
super.onReceive(context, intent);
String action = intent.getAction();
if (WifiManager.WIFI_STATE_CHANGED_ACTION.equals(action)) {
sWifiState.onActualStateChange(context, intent);
} else if (BluetoothAdapter.ACTION_STATE_CHANGED.equals(action)) {
sBluetoothState.onActualStateChange(context, intent);
} else if (LocationManager.PROVIDERS_CHANGED_ACTION.equals(action)) {
sGpsState.onActualStateChange(context, intent);
} else if (SyncStorageEngine.SYNC_CONNECTION_SETTING_CHANGED_INTENT.getAction()
.equals(action)) {
sSyncState.onActualStateChange(context, intent);
} else if (intent.hasCategory(Intent.CATEGORY_ALTERNATIVE)) {
Uri data = intent.getData();
int buttonId = Integer.parseInt(data.getSchemeSpecificPart());
if (buttonId == BUTTON_WIFI) {
sWifiState.toggleState(context);
} else if (buttonId == BUTTON_BRIGHTNESS) {
toggleBrightness(context);
} else if (buttonId == BUTTON_SYNC) {
sSyncState.toggleState(context);
} else if (buttonId == BUTTON_GPS) {
sGpsState.toggleState(context);
} else if (buttonId == BUTTON_BLUETOOTH) {
sBluetoothState.toggleState(context);
}
} else {
// Don't fall-through to updating the widget. The Intent
// was something unrelated or that our super class took
// care of.
return;
}
// State changes fall through
updateWidget(context);
}
/**
* Gets brightness level.
*
* @param context
* @return brightness level between 0 and 255.
*/
private static int getBrightness(Context context) {
try {
IPowerManager power = IPowerManager.Stub.asInterface(
ServiceManager.getService("power"));
if (power != null) {
int brightness = Settings.System.getInt(context.getContentResolver(),
Settings.System.SCREEN_BRIGHTNESS);
return brightness;
}
} catch (Exception e) {
}
return 0;
}
/**
* Gets state of brightness mode.
*
* @param context
* @return true if auto brightness is on.
*/
private static boolean getBrightnessMode(Context context) {
try {
IPowerManager power = IPowerManager.Stub.asInterface(
ServiceManager.getService("power"));
if (power != null) {
int brightnessMode = Settings.System.getInt(context.getContentResolver(),
Settings.System.SCREEN_BRIGHTNESS_MODE);
return brightnessMode == Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC;
}
} catch (Exception e) {
Log.d(TAG, "getBrightnessMode: " + e);
}
return false;
}
/**
* Increases or decreases the brightness.
*
* @param context
*/
private void toggleBrightness(Context context) {
try {
IPowerManager power = IPowerManager.Stub.asInterface(
ServiceManager.getService("power"));
if (power != null) {
ContentResolver cr = context.getContentResolver();
int brightness = Settings.System.getInt(cr,
Settings.System.SCREEN_BRIGHTNESS);
int brightnessMode = Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL;
//Only get brightness setting if available
if (context.getResources().getBoolean(
com.android.internal.R.bool.config_automatic_brightness_available)) {
brightnessMode = Settings.System.getInt(cr,
Settings.System.SCREEN_BRIGHTNESS_MODE);
}
// Rotate AUTO -> MINIMUM -> DEFAULT -> MAXIMUM
// Technically, not a toggle...
if (brightnessMode == Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC) {
brightness = MINIMUM_BACKLIGHT;
brightnessMode = Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL;
} else if (brightness < DEFAULT_BACKLIGHT) {
brightness = DEFAULT_BACKLIGHT;
} else if (brightness < MAXIMUM_BACKLIGHT) {
brightness = MAXIMUM_BACKLIGHT;
} else {
brightnessMode = Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC;
brightness = MINIMUM_BACKLIGHT;
}
if (context.getResources().getBoolean(
com.android.internal.R.bool.config_automatic_brightness_available)) {
// Set screen brightness mode (automatic or manual)
Settings.System.putInt(context.getContentResolver(),
Settings.System.SCREEN_BRIGHTNESS_MODE,
brightnessMode);
} else {
// Make sure we set the brightness if automatic mode isn't available
brightnessMode = Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL;
}
if (brightnessMode == Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL) {
power.setBacklightBrightness(brightness);
Settings.System.putInt(cr, Settings.System.SCREEN_BRIGHTNESS, brightness);
}
}
} catch (RemoteException e) {
Log.d(TAG, "toggleBrightness: " + e);
} catch (Settings.SettingNotFoundException e) {
Log.d(TAG, "toggleBrightness: " + e);
}
}
/** Observer to watch for changes to the BRIGHTNESS setting */
private static class SettingsObserver extends ContentObserver {
private Context mContext;
SettingsObserver(Handler handler, Context context) {
super(handler);
mContext = context;
}
void startObserving() {
ContentResolver resolver = mContext.getContentResolver();
// Listen to brightness and brightness mode
resolver.registerContentObserver(Settings.System
.getUriFor(Settings.System.SCREEN_BRIGHTNESS), false, this);
resolver.registerContentObserver(Settings.System
.getUriFor(Settings.System.SCREEN_BRIGHTNESS_MODE), false, this);
}
void stopObserving() {
mContext.getContentResolver().unregisterContentObserver(this);
}
@Override
public void onChange(boolean selfChange) {
updateWidget(mContext);
}
}
}