/*
* Copyright (C) 2011 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.tests.testsensors;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;
public class TestSensorsActivity extends Activity {
private static final String TAG = "testSensors";
/** Array containing monitored sensors. */
private List<MonitoredSensor> mSensors;
/** Controls displayed list of sensors. */
private TableLayout mTableLayout;
/**
* Encapsulates a sensor.
*/
private class MonitoredSensor implements SensorEventListener {
/** Sensor to monitor. */
private final Sensor mSensor;
/** Check box representing the sensor on the screen. */
private final TextView mName;
/** Text view displaying the value of the sensor. */
private final TextView mVal;
/** Formats string to show in the TextView. */
private String mTextFmt;
/**
* Constructs MonitoredSensor instance, and register the listeners.
*
* @param sensor Sensor to monitor.
*/
MonitoredSensor(Sensor sensor) {
mSensor = sensor;
// Add a row representing this sensor on the display
final LayoutInflater inflater = getLayoutInflater();
final TableRow row = (TableRow) inflater.inflate(R.layout.one_row, mTableLayout, false);
mTableLayout.addView(row);
// Initialize displayed checkbox for this sensor, and register
// checked state listener for it.
mName = (TextView) row.findViewById(R.id.row_textview_name);
// Initialize displayed text box for this sensor.
mVal = (TextView) row.findViewById(R.id.row_textview_value);
mVal.setText("");
// Set appropriate sensor name depending on the type. Unfortunately,
// we can't really use sensor.getName() here, since the value it
// returns (although resembles the purpose) is a bit vaguer than it
// should be. Also choose an appropriate format for the strings that
// display sensor's value, and strings that are sent to the
// emulator.
switch (sensor.getType()) {
case Sensor.TYPE_ACCELEROMETER:
mName.setText("Accelerometer");
// 3 floats.
mTextFmt = "%+.2f %+.2f %+.2f";
break;
case 9: // Sensor.TYPE_GRAVITY is missing in API 7
// 3 floats.
mName.setText("Gravity");
mTextFmt = "%+.2f %+.2f %+.2f";
break;
case Sensor.TYPE_GYROSCOPE:
mName.setText("Gyroscope");
// 3 floats.
mTextFmt = "%+.2f %+.2f %+.2f";
break;
case Sensor.TYPE_LIGHT:
mName.setText("Light");
// 1 integer.
mTextFmt = "%.0f";
break;
case 10: // Sensor.TYPE_LINEAR_ACCELERATION is missing in API 7
mName.setText("Linear acceleration");
// 3 floats.
mTextFmt = "%+.2f %+.2f %+.2f";
break;
case Sensor.TYPE_MAGNETIC_FIELD:
mName.setText("Magnetic field");
// 3 floats.
mTextFmt = "%+.2f %+.2f %+.2f";
break;
case Sensor.TYPE_ORIENTATION:
mName.setText("Orientation");
// 3 integers.
mTextFmt = "%+03.0f %+03.0f %+03.0f";
break;
case Sensor.TYPE_PRESSURE:
mName.setText("Pressure");
// 1 integer.
mTextFmt = "%.0f";
break;
case Sensor.TYPE_PROXIMITY:
mName.setText("Proximity");
// 1 integer.
mTextFmt = "%.0f";
break;
case 11: // Sensor.TYPE_ROTATION_VECTOR is missing in API 7
mName.setText("Rotation");
// 3 floats.
mTextFmt = "%+.2f %+.2f %+.2f";
break;
case Sensor.TYPE_TEMPERATURE:
mName.setText("Temperature");
// 1 integer.
mTextFmt = "%.0f";
break;
default:
mName.setText("<Unknown>");
mTextFmt = "N/A";
break;
}
}
/**
* Gets sensor type.
*
* @return Sensor type as one of the Sensor.TYPE_XXX constants.
*/
private int getType() {
return mSensor.getType();
}
/**
* Starts monitoring the sensor. NOTE: This method is called from
* outside of the UI thread.
*/
private void startListening() {
SensorManager sm = (SensorManager) getSystemService(SENSOR_SERVICE);
sm.registerListener(this, mSensor, SensorManager.SENSOR_DELAY_UI);
}
/**
* Stops monitoring the sensor. NOTE: This method is called from outside
* of the UI thread.
*/
private void stopListening() {
SensorManager sm = (SensorManager) getSystemService(SENSOR_SERVICE);
sm.unregisterListener(this);
}
/**
* Handles "sensor changed" event. This is an implementation of the
* SensorEventListener interface.
*/
@Override
public void onSensorChanged(SensorEvent event) {
// Display current sensor value, and format message that will be
// sent to the emulator.
final int nArgs = event.values.length;
String val;
if (nArgs == 3) {
val = String.format(mTextFmt, event.values[0], event.values[1], event.values[2]);
} else if (nArgs == 2) {
val = String.format(mTextFmt, event.values[0], event.values[1]);
} else if (nArgs == 1) {
val = String.format(mTextFmt, event.values[0]);
} else {
return;
}
mVal.setText(val);
}
/**
* Handles "sensor accuracy changed" event. This is an implementation of
* the SensorEventListener interface.
*/
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
} // MonitoredSensor
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mTableLayout = (TableLayout) findViewById(R.id.tableLayout);
// Iterate through the available sensors, adding them to the array.
mSensors = new ArrayList<MonitoredSensor>();
SensorManager sm = (SensorManager) getSystemService(SENSOR_SERVICE);
List<Sensor> sensors = sm.getSensorList(Sensor.TYPE_ALL);
int cur_index = 0;
for (int n = 0; n < sensors.size(); n++) {
Sensor avail_sensor = sensors.get(n);
// There can be multiple sensors of the same type. We need only one.
if (!isSensorTypeAlreadyMonitored(avail_sensor.getType())) {
// The first sensor we've got for the given type is not
// necessarily the right one. So, use the default sensor
// for the given type.
Sensor def_sens = sm.getDefaultSensor(avail_sensor.getType());
MonitoredSensor to_add = new MonitoredSensor(def_sens);
cur_index++;
mSensors.add(to_add);
to_add.startListening();
}
}
}
/**
* Checks if a sensor for the given type is already monitored.
*
* @param type Sensor type (one of the Sensor.TYPE_XXX constants)
* @return true if a sensor for the given type is already monitored, or
* false if the sensor is not monitored.
*/
private boolean isSensorTypeAlreadyMonitored(int type) {
for (int n = 0; n < mSensors.size(); n++) {
if (mSensors.get(n).getType() == type) {
return true;
}
}
return false;
}
}