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PowerManager: Add proximity sensor support.

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Add new wakelock flag PROXIMITY_SCREEN_OFF_WAKE_LOCK.
If you create a wakelock with this flag, while the wakelock is acquired,
the screen will turn off automatically when the sensor detects an object close to the screen.
Removing the object will cause the screen to wake up again.

Added PowerManager.getSupportedWakeLockFlags(), which can be used to determine
if proximity screen off wakelocks are supported by the hardware.

Signed-off-by: Mike Lockwood <lockwood@android.com>
This commit is contained in:
Mike Lockwood
2009-07-27 13:50:57 -07:00
parent b3c82efb47
commit bc706a03a2
3 changed files with 107 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
core/java/android/os/IPowerManager.aidl
View File

@@ -26,6 +26,7 @@ interface IPowerManager
void userActivity(long when, boolean noChangeLights);
void userActivityWithForce(long when, boolean noChangeLights, boolean force);
void setPokeLock(int pokey, IBinder lock, String tag);
int getSupportedWakeLockFlags();
void setStayOnSetting(int val);
long getScreenOnTime();
void preventScreenOn(boolean prevent);

43
core/java/android/os/PowerManager.java
View File

@@ -114,12 +114,14 @@ public class PowerManager
private static final int WAKE_BIT_SCREEN_DIM = 4;
private static final int WAKE_BIT_SCREEN_BRIGHT = 8;
private static final int WAKE_BIT_KEYBOARD_BRIGHT = 16;
private static final int WAKE_BIT_PROXIMITY_SCREEN_OFF = 32;
private static final int LOCK_MASK = WAKE_BIT_CPU_STRONG
| WAKE_BIT_CPU_WEAK
| WAKE_BIT_SCREEN_DIM
| WAKE_BIT_SCREEN_BRIGHT
| WAKE_BIT_KEYBOARD_BRIGHT;
| WAKE_BIT_KEYBOARD_BRIGHT
| WAKE_BIT_PROXIMITY_SCREEN_OFF;
/**
* Wake lock that ensures that the CPU is running. The screen might
@@ -146,6 +148,16 @@ public class PowerManager
*/
public static final int SCREEN_DIM_WAKE_LOCK = WAKE_BIT_CPU_WEAK | WAKE_BIT_SCREEN_DIM;
/**
* Wake lock that turns the screen off when the proximity sensor activates.
* Since not all devices have proximity sensors, use
* {@link #getSupportedWakeLockFlags() getSupportedWakeLockFlags()} to determine if
* this wake lock mode is supported.
*
* {@hide}
*/
public static final int PROXIMITY_SCREEN_OFF_WAKE_LOCK = WAKE_BIT_PROXIMITY_SCREEN_OFF;
/**
* Normally wake locks don't actually wake the device, they just cause
* it to remain on once it's already on. Think of the video player
@@ -196,6 +208,7 @@ public class PowerManager
case SCREEN_DIM_WAKE_LOCK:
case SCREEN_BRIGHT_WAKE_LOCK:
case FULL_WAKE_LOCK:
case PROXIMITY_SCREEN_OFF_WAKE_LOCK:
break;
default:
throw new IllegalArgumentException();
@@ -365,7 +378,33 @@ public class PowerManager
} catch (RemoteException e) {
}
}
/**
* Returns the set of flags for {@link #newWakeLock(int, String) newWakeLock()}
* that are supported on the device.
* For example, to test to see if the {@link #PROXIMITY_SCREEN_OFF_WAKE_LOCK}
* is supported:
*
* {@samplecode
* PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
* int supportedFlags = pm.getSupportedWakeLockFlags();
* boolean proximitySupported = ((supportedFlags & PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK)
* == PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK);
* }
*
* @return the set of supported WakeLock flags.
*
* {@hide}
*/
public int getSupportedWakeLockFlags()
{
try {
return mService.getSupportedWakeLockFlags();
} catch (RemoteException e) {
return 0;
}
}
private PowerManager()
{
}

67
services/java/com/android/server/PowerManagerService.java
View File

@@ -29,6 +29,10 @@ import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.BatteryStats;
import android.os.Binder;
import android.os.Handler;
@@ -58,7 +62,8 @@ import java.util.HashMap;
import java.util.Observable;
import java.util.Observer;
class PowerManagerService extends IPowerManager.Stub implements LocalPowerManager, Watchdog.Monitor {
class PowerManagerService extends IPowerManager.Stub
implements LocalPowerManager,Watchdog.Monitor, SensorEventListener {
private static final String TAG = "PowerManagerService";
static final String PARTIAL_NAME = "PowerManagerService";
@@ -72,7 +77,8 @@ class PowerManagerService extends IPowerManager.Stub implements LocalPowerManage
private static final int LOCK_MASK = PowerManager.PARTIAL_WAKE_LOCK
| PowerManager.SCREEN_DIM_WAKE_LOCK
| PowerManager.SCREEN_BRIGHT_WAKE_LOCK
| PowerManager.FULL_WAKE_LOCK;
| PowerManager.FULL_WAKE_LOCK
| PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK;
// time since last state: time since last event:
// The short keylight delay comes from Gservices; this is the default.
@@ -138,6 +144,7 @@ class PowerManagerService extends IPowerManager.Stub implements LocalPowerManage
private int[] mBroadcastQueue = new int[] { -1, -1, -1 };
private int[] mBroadcastWhy = new int[3];
private int mPartialCount = 0;
private int mProximityCount = 0;
private int mPowerState;
private boolean mOffBecauseOfUser;
private int mUserState;
@@ -175,6 +182,8 @@ class PowerManagerService extends IPowerManager.Stub implements LocalPowerManage
private IActivityManager mActivityService;
private IBatteryStats mBatteryStats;
private BatteryService mBatteryService;
private SensorManager mSensorManager;
private Sensor mProximitySensor;
private boolean mDimScreen = true;
private long mNextTimeout;
private volatile int mPokey = 0;
@@ -536,6 +545,7 @@ class PowerManagerService extends IPowerManager.Stub implements LocalPowerManage
wl.minState = SCREEN_DIM;
break;
case PowerManager.PARTIAL_WAKE_LOCK:
case PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK:
break;
default:
// just log and bail. we're in the server, so don't
@@ -583,6 +593,11 @@ class PowerManagerService extends IPowerManager.Stub implements LocalPowerManage
}
}
Power.acquireWakeLock(Power.PARTIAL_WAKE_LOCK,PARTIAL_NAME);
} else if ((flags & LOCK_MASK) == PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK) {
mProximityCount++;
if (mProximityCount == 1) {
enableProximityLockLocked();
}
}
if (newlock) {
acquireUid = wl.uid;
@@ -639,6 +654,11 @@ class PowerManagerService extends IPowerManager.Stub implements LocalPowerManage
if (LOG_PARTIAL_WL) EventLog.writeEvent(LOG_POWER_PARTIAL_WAKE_STATE, 0, wl.tag);
Power.releaseWakeLock(PARTIAL_NAME);
}
} else if ((wl.flags & LOCK_MASK) == PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK) {
mProximityCount--;
if (mProximityCount == 0) {
disableProximityLockLocked();
}
}
// Unlink the lock from the binder.
wl.binder.unlinkToDeath(wl, 0);
@@ -1996,4 +2016,47 @@ class PowerManagerService extends IPowerManager.Stub implements LocalPowerManage
public void monitor() {
synchronized (mLocks) { }
}
public int getSupportedWakeLockFlags() {
int result = PowerManager.PARTIAL_WAKE_LOCK
| PowerManager.FULL_WAKE_LOCK
| PowerManager.SCREEN_DIM_WAKE_LOCK;
// call getSensorManager() to make sure mProximitySensor is initialized
getSensorManager();
if (mProximitySensor != null) {
result |= PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK;
}
return result;
}
private SensorManager getSensorManager() {
if (mSensorManager == null) {
mSensorManager = new SensorManager(mHandlerThread.getLooper());
mProximitySensor = mSensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY);
}
return mSensorManager;
}
private void enableProximityLockLocked() {
mSensorManager.registerListener(this, mProximitySensor, SensorManager.SENSOR_DELAY_NORMAL);
}
private void disableProximityLockLocked() {
mSensorManager.unregisterListener(this);
}
public void onSensorChanged(SensorEvent event) {
long milliseconds = event.timestamp / 1000000;
if (event.values[0] == 0.0) {
goToSleep(milliseconds);
} else {
userActivity(milliseconds, false);
}
}
public void onAccuracyChanged(Sensor sensor, int accuracy) {
// ignore
}
}