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A library jar that provides APIs for Applications written for the Google Android Platform.
/*
* Copyright (C) 2012 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 android.hardware;
import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Handler;
import android.os.Looper;
import android.os.MessageQueue;
import android.util.Log;
import android.util.SparseArray;
import android.util.SparseBooleanArray;
import android.util.SparseIntArray;
import dalvik.system.CloseGuard;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
/**
* Sensor manager implementation that communicates with the built-in
* system sensors.
*
* @hide
*/
public class SystemSensorManager extends SensorManager {
private static native void nativeClassInit();
private static native long nativeCreate(String opPackageName);
private static native boolean nativeGetSensorAtIndex(long nativeInstance,
Sensor sensor, int index);
private static native boolean nativeIsDataInjectionEnabled(long nativeInstance);
private static boolean sSensorModuleInitialized = false;
private static InjectEventQueue mInjectEventQueue = null;
private final Object mLock = new Object();
private final ArrayList mFullSensorsList = new ArrayList<>();
private final SparseArray mHandleToSensor = new SparseArray<>();
// Listener list
private final HashMap mSensorListeners =
new HashMap();
private final HashMap mTriggerListeners =
new HashMap();
// Looper associated with the context in which this instance was created.
private final Looper mMainLooper;
private final int mTargetSdkLevel;
private final Context mContext;
private final long mNativeInstance;
/** {@hide} */
public SystemSensorManager(Context context, Looper mainLooper) {
mMainLooper = mainLooper;
mTargetSdkLevel = context.getApplicationInfo().targetSdkVersion;
mContext = context;
mNativeInstance = nativeCreate(context.getOpPackageName());
synchronized(mLock) {
if (!sSensorModuleInitialized) {
sSensorModuleInitialized = true;
nativeClassInit();
}
}
// initialize the sensor list
for (int index = 0;;++index) {
Sensor sensor = new Sensor();
if (!nativeGetSensorAtIndex(mNativeInstance, sensor, index)) break;
mFullSensorsList.add(sensor);
mHandleToSensor.append(sensor.getHandle(), sensor);
}
}
/** @hide */
@Override
protected List getFullSensorList() {
return mFullSensorsList;
}
/** @hide */
@Override
protected boolean registerListenerImpl(SensorEventListener listener, Sensor sensor,
int delayUs, Handler handler, int maxBatchReportLatencyUs, int reservedFlags) {
if (listener == null || sensor == null) {
Log.e(TAG, "sensor or listener is null");
return false;
}
// Trigger Sensors should use the requestTriggerSensor call.
if (sensor.getReportingMode() == Sensor.REPORTING_MODE_ONE_SHOT) {
Log.e(TAG, "Trigger Sensors should use the requestTriggerSensor.");
return false;
}
if (maxBatchReportLatencyUs < 0 || delayUs < 0) {
Log.e(TAG, "maxBatchReportLatencyUs and delayUs should be non-negative");
return false;
}
// Invariants to preserve:
// - one Looper per SensorEventListener
// - one Looper per SensorEventQueue
// We map SensorEventListener to a SensorEventQueue, which holds the looper
synchronized (mSensorListeners) {
SensorEventQueue queue = mSensorListeners.get(listener);
if (queue == null) {
Looper looper = (handler != null) ? handler.getLooper() : mMainLooper;
final String fullClassName = listener.getClass().getEnclosingClass() != null ?
listener.getClass().getEnclosingClass().getName() :
listener.getClass().getName();
queue = new SensorEventQueue(listener, looper, this, fullClassName);
if (!queue.addSensor(sensor, delayUs, maxBatchReportLatencyUs)) {
queue.dispose();
return false;
}
mSensorListeners.put(listener, queue);
return true;
} else {
return queue.addSensor(sensor, delayUs, maxBatchReportLatencyUs);
}
}
}
/** @hide */
@Override
protected void unregisterListenerImpl(SensorEventListener listener, Sensor sensor) {
// Trigger Sensors should use the cancelTriggerSensor call.
if (sensor != null && sensor.getReportingMode() == Sensor.REPORTING_MODE_ONE_SHOT) {
return;
}
synchronized (mSensorListeners) {
SensorEventQueue queue = mSensorListeners.get(listener);
if (queue != null) {
boolean result;
if (sensor == null) {
result = queue.removeAllSensors();
} else {
result = queue.removeSensor(sensor, true);
}
if (result && !queue.hasSensors()) {
mSensorListeners.remove(listener);
queue.dispose();
}
}
}
}
/** @hide */
@Override
protected boolean requestTriggerSensorImpl(TriggerEventListener listener, Sensor sensor) {
if (sensor == null) throw new IllegalArgumentException("sensor cannot be null");
if (listener == null) throw new IllegalArgumentException("listener cannot be null");
if (sensor.getReportingMode() != Sensor.REPORTING_MODE_ONE_SHOT) return false;
synchronized (mTriggerListeners) {
TriggerEventQueue queue = mTriggerListeners.get(listener);
if (queue == null) {
final String fullClassName = listener.getClass().getEnclosingClass() != null ?
listener.getClass().getEnclosingClass().getName() :
listener.getClass().getName();
queue = new TriggerEventQueue(listener, mMainLooper, this, fullClassName);
if (!queue.addSensor(sensor, 0, 0)) {
queue.dispose();
return false;
}
mTriggerListeners.put(listener, queue);
return true;
} else {
return queue.addSensor(sensor, 0, 0);
}
}
}
/** @hide */
@Override
protected boolean cancelTriggerSensorImpl(TriggerEventListener listener, Sensor sensor,
boolean disable) {
if (sensor != null && sensor.getReportingMode() != Sensor.REPORTING_MODE_ONE_SHOT) {
return false;
}
synchronized (mTriggerListeners) {
TriggerEventQueue queue = mTriggerListeners.get(listener);
if (queue != null) {
boolean result;
if (sensor == null) {
result = queue.removeAllSensors();
} else {
result = queue.removeSensor(sensor, disable);
}
if (result && !queue.hasSensors()) {
mTriggerListeners.remove(listener);
queue.dispose();
}
return result;
}
return false;
}
}
protected boolean flushImpl(SensorEventListener listener) {
if (listener == null) throw new IllegalArgumentException("listener cannot be null");
synchronized (mSensorListeners) {
SensorEventQueue queue = mSensorListeners.get(listener);
if (queue == null) {
return false;
} else {
return (queue.flush() == 0);
}
}
}
protected boolean initDataInjectionImpl(boolean enable) {
synchronized (mLock) {
if (enable) {
boolean isDataInjectionModeEnabled = nativeIsDataInjectionEnabled(mNativeInstance);
// The HAL does not support injection OR SensorService hasn't been set in DI mode.
if (!isDataInjectionModeEnabled) {
Log.e(TAG, "Data Injection mode not enabled");
return false;
}
// Initialize a client for data_injection.
if (mInjectEventQueue == null) {
mInjectEventQueue = new InjectEventQueue(mMainLooper, this,
mContext.getPackageName());
}
} else {
// If data injection is being disabled clean up the native resources.
if (mInjectEventQueue != null) {
mInjectEventQueue.dispose();
mInjectEventQueue = null;
}
}
return true;
}
}
protected boolean injectSensorDataImpl(Sensor sensor, float[] values, int accuracy,
long timestamp) {
synchronized (mLock) {
if (mInjectEventQueue == null) {
Log.e(TAG, "Data injection mode not activated before calling injectSensorData");
return false;
}
int ret = mInjectEventQueue.injectSensorData(sensor.getHandle(), values, accuracy,
timestamp);
// If there are any errors in data injection clean up the native resources.
if (ret != 0) {
mInjectEventQueue.dispose();
mInjectEventQueue = null;
}
return ret == 0;
}
}
/*
* BaseEventQueue is the communication channel with the sensor service,
* SensorEventQueue, TriggerEventQueue are subclases and there is one-to-one mapping between
* the queues and the listeners. InjectEventQueue is also a sub-class which is a special case
* where data is being injected into the sensor HAL through the sensor service. It is not
* associated with any listener and there is one InjectEventQueue associated with a
* SensorManager instance.
*/
private static abstract class BaseEventQueue {
private static native long nativeInitBaseEventQueue(long nativeManager,
WeakReference eventQWeak, MessageQueue msgQ, float[] scratch,
String packageName, int mode, String opPackageName);
private static native int nativeEnableSensor(long eventQ, int handle, int rateUs,
int maxBatchReportLatencyUs);
private static native int nativeDisableSensor(long eventQ, int handle);
private static native void nativeDestroySensorEventQueue(long eventQ);
private static native int nativeFlushSensor(long eventQ);
private static native int nativeInjectSensorData(long eventQ, int handle,
float[] values,int accuracy, long timestamp);
private long nSensorEventQueue;
private final SparseBooleanArray mActiveSensors = new SparseBooleanArray();
protected final SparseIntArray mSensorAccuracies = new SparseIntArray();
protected final SparseBooleanArray mFirstEvent = new SparseBooleanArray();
private final CloseGuard mCloseGuard = CloseGuard.get();
private final float[] mScratch = new float[16];
protected final SystemSensorManager mManager;
protected static final int OPERATING_MODE_NORMAL = 0;
protected static final int OPERATING_MODE_DATA_INJECTION = 1;
BaseEventQueue(Looper looper, SystemSensorManager manager, int mode, String packageName) {
if (packageName == null) packageName = "";
nSensorEventQueue = nativeInitBaseEventQueue(manager.mNativeInstance,
new WeakReference<>(this), looper.getQueue(), mScratch,
packageName, mode, manager.mContext.getOpPackageName());
mCloseGuard.open("dispose");
mManager = manager;
}
public void dispose() {
dispose(false);
}
public boolean addSensor(
Sensor sensor, int delayUs, int maxBatchReportLatencyUs) {
// Check if already present.
int handle = sensor.getHandle();
if (mActiveSensors.get(handle)) return false;
// Get ready to receive events before calling enable.
mActiveSensors.put(handle, true);
addSensorEvent(sensor);
if (enableSensor(sensor, delayUs, maxBatchReportLatencyUs) != 0) {
// Try continuous mode if batching fails.
if (maxBatchReportLatencyUs == 0 ||
maxBatchReportLatencyUs > 0 && enableSensor(sensor, delayUs, 0) != 0) {
removeSensor(sensor, false);
return false;
}
}
return true;
}
public boolean removeAllSensors() {
for (int i=0 ; i= 0;
}
@Override
protected void finalize() throws Throwable {
try {
dispose(true);
} finally {
super.finalize();
}
}
private void dispose(boolean finalized) {
if (mCloseGuard != null) {
if (finalized) {
mCloseGuard.warnIfOpen();
}
mCloseGuard.close();
}
if (nSensorEventQueue != 0) {
nativeDestroySensorEventQueue(nSensorEventQueue);
nSensorEventQueue = 0;
}
}
private int enableSensor(
Sensor sensor, int rateUs, int maxBatchReportLatencyUs) {
if (nSensorEventQueue == 0) throw new NullPointerException();
if (sensor == null) throw new NullPointerException();
return nativeEnableSensor(nSensorEventQueue, sensor.getHandle(), rateUs,
maxBatchReportLatencyUs);
}
protected int injectSensorDataBase(int handle, float[] values, int accuracy,
long timestamp) {
return nativeInjectSensorData(nSensorEventQueue, handle, values, accuracy, timestamp);
}
private int disableSensor(Sensor sensor) {
if (nSensorEventQueue == 0) throw new NullPointerException();
if (sensor == null) throw new NullPointerException();
return nativeDisableSensor(nSensorEventQueue, sensor.getHandle());
}
protected abstract void dispatchSensorEvent(int handle, float[] values, int accuracy,
long timestamp);
protected abstract void dispatchFlushCompleteEvent(int handle);
protected abstract void addSensorEvent(Sensor sensor);
protected abstract void removeSensorEvent(Sensor sensor);
}
static final class SensorEventQueue extends BaseEventQueue {
private final SensorEventListener mListener;
private final SparseArray mSensorsEvents = new SparseArray();
public SensorEventQueue(SensorEventListener listener, Looper looper,
SystemSensorManager manager, String packageName) {
super(looper, manager, OPERATING_MODE_NORMAL, packageName);
mListener = listener;
}
@Override
public void addSensorEvent(Sensor sensor) {
SensorEvent t = new SensorEvent(Sensor.getMaxLengthValuesArray(sensor,
mManager.mTargetSdkLevel));
synchronized (mSensorsEvents) {
mSensorsEvents.put(sensor.getHandle(), t);
}
}
@Override
public void removeSensorEvent(Sensor sensor) {
synchronized (mSensorsEvents) {
mSensorsEvents.delete(sensor.getHandle());
}
}
// Called from native code.
@SuppressWarnings("unused")
@Override
protected void dispatchSensorEvent(int handle, float[] values, int inAccuracy,
long timestamp) {
final Sensor sensor = mManager.mHandleToSensor.get(handle);
SensorEvent t = null;
synchronized (mSensorsEvents) {
t = mSensorsEvents.get(handle);
}
if (t == null) {
// This may happen if the client has unregistered and there are pending events in
// the queue waiting to be delivered. Ignore.
return;
}
// Copy from the values array.
System.arraycopy(values, 0, t.values, 0, t.values.length);
t.timestamp = timestamp;
t.accuracy = inAccuracy;
t.sensor = sensor;
// call onAccuracyChanged() only if the value changes
final int accuracy = mSensorAccuracies.get(handle);
if ((t.accuracy >= 0) && (accuracy != t.accuracy)) {
mSensorAccuracies.put(handle, t.accuracy);
mListener.onAccuracyChanged(t.sensor, t.accuracy);
}
mListener.onSensorChanged(t);
}
@SuppressWarnings("unused")
protected void dispatchFlushCompleteEvent(int handle) {
if (mListener instanceof SensorEventListener2) {
final Sensor sensor = mManager.mHandleToSensor.get(handle);
((SensorEventListener2)mListener).onFlushCompleted(sensor);
}
return;
}
}
static final class TriggerEventQueue extends BaseEventQueue {
private final TriggerEventListener mListener;
private final SparseArray mTriggerEvents = new SparseArray();
public TriggerEventQueue(TriggerEventListener listener, Looper looper,
SystemSensorManager manager, String packageName) {
super(looper, manager, OPERATING_MODE_NORMAL, packageName);
mListener = listener;
}
@Override
public void addSensorEvent(Sensor sensor) {
TriggerEvent t = new TriggerEvent(Sensor.getMaxLengthValuesArray(sensor,
mManager.mTargetSdkLevel));
synchronized (mTriggerEvents) {
mTriggerEvents.put(sensor.getHandle(), t);
}
}
@Override
public void removeSensorEvent(Sensor sensor) {
synchronized (mTriggerEvents) {
mTriggerEvents.delete(sensor.getHandle());
}
}
// Called from native code.
@SuppressWarnings("unused")
@Override
protected void dispatchSensorEvent(int handle, float[] values, int accuracy,
long timestamp) {
final Sensor sensor = mManager.mHandleToSensor.get(handle);
TriggerEvent t = null;
synchronized (mTriggerEvents) {
t = mTriggerEvents.get(handle);
}
if (t == null) {
Log.e(TAG, "Error: Trigger Event is null for Sensor: " + sensor);
return;
}
// Copy from the values array.
System.arraycopy(values, 0, t.values, 0, t.values.length);
t.timestamp = timestamp;
t.sensor = sensor;
// A trigger sensor is auto disabled. So just clean up and don't call native
// disable.
mManager.cancelTriggerSensorImpl(mListener, sensor, false);
mListener.onTrigger(t);
}
@SuppressWarnings("unused")
protected void dispatchFlushCompleteEvent(int handle) {
}
}
final class InjectEventQueue extends BaseEventQueue {
public InjectEventQueue(Looper looper, SystemSensorManager manager, String packageName) {
super(looper, manager, OPERATING_MODE_DATA_INJECTION, packageName);
}
int injectSensorData(int handle, float[] values,int accuracy, long timestamp) {
return injectSensorDataBase(handle, values, accuracy, timestamp);
}
@SuppressWarnings("unused")
protected void dispatchSensorEvent(int handle, float[] values, int accuracy,
long timestamp) {
}
@SuppressWarnings("unused")
protected void dispatchFlushCompleteEvent(int handle) {
}
@SuppressWarnings("unused")
protected void addSensorEvent(Sensor sensor) {
}
@SuppressWarnings("unused")
protected void removeSensorEvent(Sensor sensor) {
}
}
}
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