In December 2012 I wrote a post about an app that displays the sensor list in an android device, now after about a year and a half the API 19 have new sensor types and methods and I thought to update the app.
The main changes have been made to the class MySensor:
|
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 |
package eu.lucazanini.sensorlist; import android.annotation.TargetApi; import android.content.Context; import android.hardware.Sensor; import android.os.Build; public class MySensor { private final static String MICRO = "μ"; private static final int SDK = Build.VERSION.SDK_INT; private final static String SQUARE = "²"; private Context context; private float maximumRange, minDelay, power, resolution; private String name, vendor; private int type, version, fifoMaxEventCount, fifoReservedEventCount; public MySensor(Sensor sensor, Context context) { this.name = sensor.getName(); this.vendor = sensor.getVendor(); this.type = sensor.getType(); this.version = sensor.getVersion(); this.maximumRange = sensor.getMaximumRange(); this.power = sensor.getPower(); this.resolution = sensor.getResolution(); if (SDK >= Build.VERSION_CODES.GINGERBREAD) MySensorAPI9(sensor); if (SDK >= Build.VERSION_CODES.KITKAT) MySensorAPI19(sensor); this.context = context; } public String getDelayUnits() { return MICRO + "s"; } public int getFifoMaxEventCount() { return fifoMaxEventCount; } public int getFifoReservedEventCount() { return fifoReservedEventCount; } public float getMaximumRange() { return maximumRange; } public float getMinDelay() { return minDelay; } public String getName() { return name; } public float getPower() { return power; } public String getPowerUnits() { return "mA"; } public float getResolution() { return resolution; } public int getType() { return type; } public String getTypeDescription() { String description = null; switch (type) { case Sensor.TYPE_ACCELEROMETER: description = context.getResources().getString( R.string.accelerometer); break; case Sensor.TYPE_AMBIENT_TEMPERATURE: description = context.getResources().getString( R.string.ambient_temperature); break; case Sensor.TYPE_GAME_ROTATION_VECTOR: description = context.getResources().getString( R.string.game_rotation); break; case Sensor.TYPE_GEOMAGNETIC_ROTATION_VECTOR: description = context.getResources().getString( R.string.geomagnetic_rotation); break; case Sensor.TYPE_GRAVITY: description = context.getResources().getString(R.string.gravity); break; case Sensor.TYPE_GYROSCOPE: description = context.getResources().getString(R.string.gyroscope); break; case Sensor.TYPE_GYROSCOPE_UNCALIBRATED: description = context.getResources().getString( R.string.uncalibrated_gyroscope); break; case Sensor.TYPE_LIGHT: description = context.getResources().getString(R.string.light); break; case Sensor.TYPE_LINEAR_ACCELERATION: description = context.getResources().getString( R.string.linear_acceleration); break; case Sensor.TYPE_MAGNETIC_FIELD: description = context.getResources().getString( R.string.magnetic_field); break; case Sensor.TYPE_MAGNETIC_FIELD_UNCALIBRATED: description = context.getResources().getString( R.string.uncalibrated_magnetic_field); break; case Sensor.TYPE_ORIENTATION: description = context.getResources() .getString(R.string.orientation); break; case Sensor.TYPE_PRESSURE: description = context.getResources().getString(R.string.pressure); break; case Sensor.TYPE_PROXIMITY: description = context.getResources().getString(R.string.proximity); break; case Sensor.TYPE_RELATIVE_HUMIDITY: description = context.getResources().getString( R.string.relative_humidity); break; case Sensor.TYPE_ROTATION_VECTOR: description = context.getResources().getString( R.string.rotation_vector); break; case Sensor.TYPE_SIGNIFICANT_MOTION: description = context.getResources().getString( R.string.significant_motion); break; case Sensor.TYPE_STEP_COUNTER: description = context.getResources().getString( R.string.step_counter); break; case Sensor.TYPE_STEP_DETECTOR: description = context.getResources().getString( R.string.step_detector); break; case Sensor.TYPE_TEMPERATURE: description = context.getResources() .getString(R.string.temperature); break; default: description = context.getResources().getString(R.string.unknown); break; } return description; } public String getUnits() { String units = null; switch (type) { case Sensor.TYPE_ACCELEROMETER: units = "m/s" + SQUARE; break; case Sensor.TYPE_AMBIENT_TEMPERATURE: units = "°C"; break; case Sensor.TYPE_GAME_ROTATION_VECTOR: units = ""; break; case Sensor.TYPE_GEOMAGNETIC_ROTATION_VECTOR: units = ""; break; case Sensor.TYPE_GRAVITY: units = "m/s" + SQUARE; break; case Sensor.TYPE_GYROSCOPE: units = "rad/s"; break; case Sensor.TYPE_LIGHT: units = "SI lux"; break; case Sensor.TYPE_LINEAR_ACCELERATION: units = "m/s" + SQUARE; break; case Sensor.TYPE_MAGNETIC_FIELD: units = MICRO + "T"; break; case Sensor.TYPE_MAGNETIC_FIELD_UNCALIBRATED: units = MICRO + "T"; break; case Sensor.TYPE_ORIENTATION: units = "°"; break; case Sensor.TYPE_PRESSURE: units = "hPa"; break; case Sensor.TYPE_PROXIMITY: units = "cm"; break; case Sensor.TYPE_RELATIVE_HUMIDITY: units = ""; break; case Sensor.TYPE_ROTATION_VECTOR: units = ""; break; case Sensor.TYPE_SIGNIFICANT_MOTION: units = ""; break; case Sensor.TYPE_STEP_COUNTER: units = ""; break; case Sensor.TYPE_STEP_DETECTOR: units = ""; break; case Sensor.TYPE_TEMPERATURE: units = "°C"; break; default: units = "unknown"; break; } return units; } public String getVendor() { return vendor; } public int getVersion() { return version; } public void setFifoMaxEventCount(int fifoMaxEventCount) { this.fifoMaxEventCount = fifoMaxEventCount; } public void setFifoReservedEventCount(int fifoReservedEventCount) { this.fifoReservedEventCount = fifoReservedEventCount; } public void setMaximumRange(float maximumRange) { this.maximumRange = maximumRange; } public void setMinDelay(float minDelay) { this.minDelay = minDelay; } public void setName(String name) { this.name = name; } public void setPower(float power) { this.power = power; } public void setResolution(float resolution) { this.resolution = resolution; } public void setType(int type) { this.type = type; } public void setVendor(String vendor) { this.vendor = vendor; } public void setVersion(int version) { this.version = version; } @Override public String toString() { return name; } @TargetApi(Build.VERSION_CODES.KITKAT) private void MySensorAPI19(Sensor sensor) { this.fifoMaxEventCount = sensor.getFifoMaxEventCount(); this.fifoReservedEventCount = sensor.getFifoReservedEventCount(); } @TargetApi(Build.VERSION_CODES.GINGERBREAD) private void MySensorAPI9(Sensor sensor) { this.minDelay = sensor.getMinDelay(); } } |
The layout has been modified to show the values of the fields fifoMaxEventCount and fifoReservedEventCount, you can download the files of the app here.
This is the list of new types of sensors:
- TYPE_GAME_ROTATION_VECTOR
- TYPE_GEOMAGNETIC_ROTATION_VECTOR
- TYPE_GYROSCOPE_UNCALIBRATED
- TYPE_SIGNIFICANT_MOTION
- TYPE_STEP_COUNTER
- TYPE_STEP_DETECTOR
I find very interesting TYPE_GAME_ROTATION_VECTOR that it is like TYPE_ROTATION_VECTOR because it doesn’t use the magnetometer but only the accelerometer to return the rotation vector.
In this way you can’t get the orientation of the device in Earth’s coordinate system but it is more accurate, in other words you know how much the device is rotated but you can’t know the orientation with respect to magnetic north.
There are these new methods in class Sensor with API 19:
- public int getFifoMaxEventCount()
- public int getFifoReservedEventCount()
and in the Nexus 5 they are always different from zero except for TYPE_SIGNIFICANT_MOTION, then the batch mode is almost always supported.
