1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
/*
* Copyright (c) 2015 The CyanogenMod 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.cyanogenmod.settings.device;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
public class OrientationSensor implements SensorEventListener {
public static final int ORIENTATION_UNKNOWN = 0;
public static final int ORIENTATION_FACE_DOWN = 1;
public static final int ORIENTATION_FACE_UP = 2;
public static final int ORIENTATION_VERTICAL = 3;
private static final int ORIENTATION_DELAY = 60 * 1000;
private static final int ORIENTATION_LATENCY = 0;
private static final float MATH_PI_1_4 = 0.785398F;
private static final float MATH_PI_3_4 = 2.35619F;
private boolean mEnabled;
private boolean mReady;
private int mState;
private float mGravity[];
private float mMagnetic[];
private OrientationListener mOrientationListener;
private Sensor mAccelerometerSensor;
private Sensor mMagneticFieldSensor;
private SensorManager mSensorManager;
public static interface OrientationListener {
public abstract void onEvent();
}
public boolean isFaceDown() {
return mReady && mState == ORIENTATION_FACE_DOWN;
}
public boolean isFaceUp() {
return mReady && mState == ORIENTATION_FACE_UP;
}
public boolean isVertical() {
return mReady && mState == ORIENTATION_VERTICAL;
}
public OrientationSensor(Context context, SensorManager sensorManager,
OrientationListener orientationListener) {
mEnabled = false;
reset();
mAccelerometerSensor = sensorManager.getDefaultSensor(
Sensor.TYPE_ACCELEROMETER, false);
mMagneticFieldSensor = sensorManager.getDefaultSensor(
Sensor.TYPE_MAGNETIC_FIELD, false);
mOrientationListener = orientationListener;
mSensorManager = sensorManager;
}
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
public void onSensorChanged(SensorEvent event) {
if (event.values.length == 0) return;
switch (event.sensor.getType()) {
case Sensor.TYPE_ACCELEROMETER:
mGravity = event.values;
break;
case Sensor.TYPE_MAGNETIC_FIELD:
mMagnetic = event.values;
break;
default:
break;
}
if (mGravity != null && mMagnetic != null) {
float[] rotationMatrix = new float[9];
if (SensorManager.getRotationMatrix(rotationMatrix, new float[9],
mGravity, mMagnetic))
{
float[] values = new float[3];
mState = ORIENTATION_UNKNOWN;
SensorManager.getOrientation(rotationMatrix, values);
// Orientation is flat
if (values[1] > -MATH_PI_1_4 && values[1] < MATH_PI_1_4) {
// Device is face up
if (values[2] > -MATH_PI_1_4 && values[2] < MATH_PI_1_4) {
mState = ORIENTATION_FACE_UP;
}
// Device is face down
else if (values[2] < -MATH_PI_3_4 || values[2] > MATH_PI_3_4) {
mState = ORIENTATION_FACE_DOWN;
}
}
// Orientation is vertical
if (values[1] < -MATH_PI_1_4 || values[1] > MATH_PI_1_4 ||
(values[2] > MATH_PI_1_4 && values[2] < MATH_PI_3_4) ||
(values[2] > -MATH_PI_3_4 && values[2] < -MATH_PI_1_4)) {
mState = ORIENTATION_VERTICAL;
}
// Launch an event
mReady = true;
mOrientationListener.onEvent();
}
}
}
public void enable() {
if (!mEnabled && mAccelerometerSensor != null && mMagneticFieldSensor != null) {
reset();
mState = ORIENTATION_UNKNOWN;
mSensorManager.registerListener(this, mAccelerometerSensor,
ORIENTATION_DELAY, ORIENTATION_LATENCY);
mSensorManager.registerListener(this, mMagneticFieldSensor,
ORIENTATION_DELAY, ORIENTATION_LATENCY);
mEnabled = true;
}
}
public void reset() {
mGravity = null;
mMagnetic = null;
mReady = false;
}
public void disable() {
if (mEnabled && mAccelerometerSensor != null && mMagneticFieldSensor != null) {
mSensorManager.unregisterListener(this,mAccelerometerSensor);
mSensorManager.unregisterListener(this, mMagneticFieldSensor);
mEnabled = false;
}
}
}
|
