diff options
Diffstat (limited to 'src/com/android/phone/AccelerometerListener.java')
| -rw-r--r-- | src/com/android/phone/AccelerometerListener.java | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/src/com/android/phone/AccelerometerListener.java b/src/com/android/phone/AccelerometerListener.java deleted file mode 100644 index 49d4a72e..00000000 --- a/src/com/android/phone/AccelerometerListener.java +++ /dev/null @@ -1,161 +0,0 @@ -/* - * 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.phone; - -import android.content.Context; -import android.hardware.Sensor; -import android.hardware.SensorEvent; -import android.hardware.SensorEventListener; -import android.hardware.SensorManager; -import android.os.Handler; -import android.os.Message; -import android.util.Log; - -/** - * This class is used to listen to the accelerometer to monitor the - * orientation of the phone. The client of this class is notified when - * the orientation changes between horizontal and vertical. - */ -public final class AccelerometerListener { - private static final String TAG = "AccelerometerListener"; - private static final boolean DEBUG = true; - private static final boolean VDEBUG = false; - - private SensorManager mSensorManager; - private Sensor mSensor; - - // mOrientation is the orientation value most recently reported to the client. - private int mOrientation; - - // mPendingOrientation is the latest orientation computed based on the sensor value. - // This is sent to the client after a rebounce delay, at which point it is copied to - // mOrientation. - private int mPendingOrientation; - - private OrientationListener mListener; - - // Device orientation - public static final int ORIENTATION_UNKNOWN = 0; - public static final int ORIENTATION_VERTICAL = 1; - public static final int ORIENTATION_HORIZONTAL = 2; - - private static final int ORIENTATION_CHANGED = 1234; - - private static final int VERTICAL_DEBOUNCE = 100; - private static final int HORIZONTAL_DEBOUNCE = 500; - private static final double VERTICAL_ANGLE = 50.0; - - public interface OrientationListener { - public void orientationChanged(int orientation); - } - - public AccelerometerListener(Context context, OrientationListener listener) { - mListener = listener; - mSensorManager = (SensorManager)context.getSystemService(Context.SENSOR_SERVICE); - mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); - } - - public void enable(boolean enable) { - if (DEBUG) Log.d(TAG, "enable(" + enable + ")"); - synchronized (this) { - if (enable) { - mOrientation = ORIENTATION_UNKNOWN; - mPendingOrientation = ORIENTATION_UNKNOWN; - mSensorManager.registerListener(mSensorListener, mSensor, - SensorManager.SENSOR_DELAY_NORMAL); - } else { - mSensorManager.unregisterListener(mSensorListener); - mHandler.removeMessages(ORIENTATION_CHANGED); - } - } - } - - private void setOrientation(int orientation) { - synchronized (this) { - if (mPendingOrientation == orientation) { - // Pending orientation has not changed, so do nothing. - return; - } - - // Cancel any pending messages. - // We will either start a new timer or cancel alltogether - // if the orientation has not changed. - mHandler.removeMessages(ORIENTATION_CHANGED); - - if (mOrientation != orientation) { - // Set timer to send an event if the orientation has changed since its - // previously reported value. - mPendingOrientation = orientation; - Message m = mHandler.obtainMessage(ORIENTATION_CHANGED); - // set delay to our debounce timeout - int delay = (orientation == ORIENTATION_VERTICAL ? VERTICAL_DEBOUNCE - : HORIZONTAL_DEBOUNCE); - mHandler.sendMessageDelayed(m, delay); - } else { - // no message is pending - mPendingOrientation = ORIENTATION_UNKNOWN; - } - } - } - - private void onSensorEvent(double x, double y, double z) { - if (VDEBUG) Log.d(TAG, "onSensorEvent(" + x + ", " + y + ", " + z + ")"); - - // If some values are exactly zero, then likely the sensor is not powered up yet. - // ignore these events to avoid false horizontal positives. - if (x == 0.0 || y == 0.0 || z == 0.0) return; - - // magnitude of the acceleration vector projected onto XY plane - double xy = Math.sqrt(x*x + y*y); - // compute the vertical angle - double angle = Math.atan2(xy, z); - // convert to degrees - angle = angle * 180.0 / Math.PI; - int orientation = (angle > VERTICAL_ANGLE ? ORIENTATION_VERTICAL : ORIENTATION_HORIZONTAL); - if (VDEBUG) Log.d(TAG, "angle: " + angle + " orientation: " + orientation); - setOrientation(orientation); - } - - SensorEventListener mSensorListener = new SensorEventListener() { - public void onSensorChanged(SensorEvent event) { - onSensorEvent(event.values[0], event.values[1], event.values[2]); - } - - public void onAccuracyChanged(Sensor sensor, int accuracy) { - // ignore - } - }; - - Handler mHandler = new Handler() { - public void handleMessage(Message msg) { - switch (msg.what) { - case ORIENTATION_CHANGED: - synchronized (this) { - mOrientation = mPendingOrientation; - if (DEBUG) { - Log.d(TAG, "orientation: " + - (mOrientation == ORIENTATION_HORIZONTAL ? "horizontal" - : (mOrientation == ORIENTATION_VERTICAL ? "vertical" - : "unknown"))); - } - mListener.orientationChanged(mOrientation); - } - break; - } - } - }; -} |