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/*
* 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.android.systemui.qs.tiles;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.widget.ImageView;
import com.android.systemui.R;
import com.android.systemui.qs.QSTile;
import com.android.systemui.qs.QSTileView;
import org.cyanogenmod.internal.logging.CMMetricsLogger;
public class CompassTile extends QSTile<QSTile.BooleanState> implements SensorEventListener {
private final static float ALPHA = 0.97f;
private boolean mActive = false;
private SensorManager mSensorManager;
private Sensor mAccelerationSensor;
private Sensor mGeomagneticFieldSensor;
private float[] mAcceleration;
private float[] mGeomagnetic;
private ImageView mImage;
private boolean mListeningSensors;
public CompassTile(Host host) {
super(host);
mSensorManager = (SensorManager) mContext.getSystemService(Context.SENSOR_SERVICE);
mAccelerationSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
mGeomagneticFieldSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);
}
@Override
protected BooleanState newTileState() {
return new BooleanState();
}
@Override
protected void handleDestroy() {
super.handleDestroy();
setListeningSensors(false);
mSensorManager = null;
mImage = null;
}
@Override
public QSTileView createTileView(Context context) {
QSTileView tileView = super.createTileView(context);
mImage = (ImageView) tileView.findViewById(android.R.id.icon);
return tileView;
}
@Override
protected void handleClick() {
mActive = !mActive;
refreshState();
setListeningSensors(mActive);
}
private void setListeningSensors(boolean listening) {
if (listening == mListeningSensors) return;
mListeningSensors = listening;
if (mListeningSensors) {
mSensorManager.registerListener(
this, mAccelerationSensor, SensorManager.SENSOR_DELAY_GAME);
mSensorManager.registerListener(
this, mGeomagneticFieldSensor, SensorManager.SENSOR_DELAY_GAME);
} else {
mSensorManager.unregisterListener(this);
}
}
@Override
protected void handleUpdateState(BooleanState state, Object arg) {
Float degrees = arg == null ? 0 :(float) arg;
state.visible = true;
state.value = mActive;
if (state.value) {
state.icon = ResourceIcon.get(R.drawable.ic_qs_compass_on);
if (arg != null) {
state.label = formatValueWithCardinalDirection(degrees);
float target = 360 - degrees;
float relative = target - mImage.getRotation();
if (relative > 180) relative -= 360;
mImage.setRotation(mImage.getRotation() + relative / 2);
} else {
state.label = mContext.getString(R.string.quick_settings_compass_init);
mImage.setRotation(0);
}
} else {
state.icon = ResourceIcon.get(R.drawable.ic_qs_compass_off);
state.label = mContext.getString(R.string.quick_settings_compass_label);
mImage.setRotation(0);
}
}
@Override
public int getMetricsCategory() {
return CMMetricsLogger.TILE_COMPASS;
}
@Override
public void setListening(boolean listening) {
if (!listening) {
setListeningSensors(false);
mActive = false;
}
}
private String formatValueWithCardinalDirection(float degree) {
int cardinalDirectionIndex = (int) (Math.floor(((degree - 22.5) % 360) / 45) + 1) % 8;
String[] cardinalDirections = mContext.getResources().getStringArray(
R.array.cardinal_directions);
return mContext.getString(R.string.quick_settings_compass_value, degree,
cardinalDirections[cardinalDirectionIndex]);
}
@Override
public void onSensorChanged(SensorEvent event) {
float[] values;
if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
if (mAcceleration == null) {
mAcceleration = event.values.clone();
}
values = mAcceleration;
} else {
// Magnetic field sensor
if (mGeomagnetic == null) {
mGeomagnetic = event.values.clone();
}
values = mGeomagnetic;
}
for (int i = 0; i < 3; i++) {
values[i] = ALPHA * values[i] + (1 - ALPHA) * event.values[i];
}
if (!mActive || !mListeningSensors || mAcceleration == null || mGeomagnetic == null) {
// Nothing to do at this moment
return;
}
float R[] = new float[9];
float I[] = new float[9];
if (!SensorManager.getRotationMatrix(R, I, mAcceleration, mGeomagnetic)) {
// Rotation matrix couldn't be calculated
return;
}
// Get the current orientation
float[] orientation = new float[3];
SensorManager.getOrientation(R, orientation);
// Convert azimuth to degrees
Float newDegree = Float.valueOf((float) Math.toDegrees(orientation[0]));
newDegree = (newDegree + 360) % 360;
refreshState(newDegree);
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
// noop
}
}
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