Java tutorial
/* * Copyright 2013 Bern University of Applied Sciences BFH * * 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 ch.bfh.sensordataprocessor.sensor; import android.content.Context; import android.hardware.Sensor; import android.hardware.SensorEvent; import android.hardware.SensorEventListener; import android.hardware.SensorManager; import android.os.Bundle; import android.support.v4.app.Fragment; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.TextView; import ch.bfh.sensordataprocessor.BuildConfig; import ch.bfh.sensordataprocessor.R; /** * Displays the details of a sensor. */ public class SensorDisplayFragment extends Fragment implements SensorEventListener { private static final String TAG = "SensorDisplayFragment"; private static final String THETA = "\u0398"; private static final String ACCELERATION_UNITS = "m/s\u00B2"; private SensorManager sensorManager; private Sensor sensor; private TextView name; private TextView type; private TextView maxRange; private TextView minDelay; private TextView power; private TextView resolution; private TextView vendor; private TextView version; private TextView accuracy; private TextView timestampLabel; private TextView timestamp; private TextView timestampUnits; private TextView dataLabel; private TextView dataUnits; private TextView xAxis; private TextView xAxisLabel; private TextView yAxis; private TextView yAxisLabel; private TextView zAxis; private TextView zAxisLabel; private TextView singleValue; private TextView cosLabel; private TextView cos; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View layout = inflater.inflate(R.layout.sensor_view, null); sensorManager = (SensorManager) getActivity().getSystemService(Context.SENSOR_SERVICE); name = (TextView) layout.findViewById(R.id.name); type = (TextView) layout.findViewById(R.id.type); maxRange = (TextView) layout.findViewById(R.id.maxRange); minDelay = (TextView) layout.findViewById(R.id.minDelay); power = (TextView) layout.findViewById(R.id.power); resolution = (TextView) layout.findViewById(R.id.resolution); vendor = (TextView) layout.findViewById(R.id.vendor); version = (TextView) layout.findViewById(R.id.version); accuracy = (TextView) layout.findViewById(R.id.accuracy); timestampLabel = (TextView) layout.findViewById(R.id.timestampLabel); timestamp = (TextView) layout.findViewById(R.id.timestamp); timestampUnits = (TextView) layout.findViewById(R.id.timestampUnits); dataLabel = (TextView) layout.findViewById(R.id.dataLabel); dataUnits = (TextView) layout.findViewById(R.id.dataUnits); xAxis = (TextView) layout.findViewById(R.id.xAxis); xAxisLabel = (TextView) layout.findViewById(R.id.xAxisLabel); yAxis = (TextView) layout.findViewById(R.id.yAxis); yAxisLabel = (TextView) layout.findViewById(R.id.yAxisLabel); zAxis = (TextView) layout.findViewById(R.id.zAxis); zAxisLabel = (TextView) layout.findViewById(R.id.zAxisLabel); singleValue = (TextView) layout.findViewById(R.id.singleValue); cosLabel = (TextView) layout.findViewById(R.id.cosLabel); cos = (TextView) layout.findViewById(R.id.cos); layout.findViewById(R.id.delayFastest).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { sensorManager.unregisterListener(SensorDisplayFragment.this); sensorManager.registerListener(SensorDisplayFragment.this, sensor, SensorManager.SENSOR_DELAY_FASTEST); } }); layout.findViewById(R.id.delayGame).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { sensorManager.unregisterListener(SensorDisplayFragment.this); sensorManager.registerListener(SensorDisplayFragment.this, sensor, SensorManager.SENSOR_DELAY_GAME); } }); layout.findViewById(R.id.delayNormal).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { sensorManager.unregisterListener(SensorDisplayFragment.this); sensorManager.registerListener(SensorDisplayFragment.this, sensor, SensorManager.SENSOR_DELAY_NORMAL); } }); layout.findViewById(R.id.delayUi).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { sensorManager.unregisterListener(SensorDisplayFragment.this); sensorManager.registerListener(SensorDisplayFragment.this, sensor, SensorManager.SENSOR_DELAY_UI); } }); return layout; } public void displaySensor(Sensor sensor) { if (BuildConfig.DEBUG) { Log.d(TAG, "display the sensor"); } this.sensor = sensor; name.setText(sensor.getName()); type.setText(String.valueOf(sensor.getType())); maxRange.setText(String.valueOf(sensor.getMaximumRange())); minDelay.setText(String.valueOf(sensor.getMinDelay())); power.setText(String.valueOf(sensor.getPower())); resolution.setText(String.valueOf(sensor.getResolution())); vendor.setText(String.valueOf(sensor.getVendor())); version.setText(String.valueOf(sensor.getVersion())); sensorManager.registerListener(this, sensor, SensorManager.SENSOR_DELAY_NORMAL); } /** * @see android.hardware.SensorEventListener#onAccuracyChanged(android.hardware.Sensor, int) */ @Override public void onAccuracyChanged(Sensor sensor, int accuracy) { switch (accuracy) { case SensorManager.SENSOR_STATUS_ACCURACY_HIGH: this.accuracy.setText("SENSOR_STATUS_ACCURACY_HIGH"); break; case SensorManager.SENSOR_STATUS_ACCURACY_MEDIUM: this.accuracy.setText("SENSOR_STATUS_ACCURACY_MEDIUM"); break; case SensorManager.SENSOR_STATUS_ACCURACY_LOW: this.accuracy.setText("SENSOR_STATUS_ACCURACY_LOW"); break; case SensorManager.SENSOR_STATUS_UNRELIABLE: this.accuracy.setText("SENSOR_STATUS_UNRELIABLE"); break; } } /** * @see android.hardware.SensorEventListener#onSensorChanged(android.hardware.SensorEvent) */ @Override public void onSensorChanged(SensorEvent event) { onAccuracyChanged(event.sensor, event.accuracy); timestampLabel.setVisibility(View.VISIBLE); timestamp.setVisibility(View.VISIBLE); timestamp.setText(String.valueOf(event.timestamp)); timestampUnits.setVisibility(View.VISIBLE); switch (event.sensor.getType()) { case Sensor.TYPE_ACCELEROMETER: showEventData("Acceleration - gravity on axis", ACCELERATION_UNITS, event.values[0], event.values[1], event.values[2]); break; case Sensor.TYPE_MAGNETIC_FIELD: showEventData("Abient Magnetic Field", "uT", event.values[0], event.values[1], event.values[2]); break; case Sensor.TYPE_GYROSCOPE: showEventData("Angular speed around axis", "radians/sec", event.values[0], event.values[1], event.values[2]); break; case Sensor.TYPE_LIGHT: showEventData("Ambient light", "lux", event.values[0]); break; case Sensor.TYPE_PRESSURE: showEventData("Atmospheric pressure", "hPa", event.values[0]); break; case Sensor.TYPE_PROXIMITY: showEventData("Distance", "cm", event.values[0]); break; case Sensor.TYPE_GRAVITY: showEventData("Gravity", ACCELERATION_UNITS, event.values[0], event.values[1], event.values[2]); break; case Sensor.TYPE_LINEAR_ACCELERATION: showEventData("Acceleration (not including gravity)", ACCELERATION_UNITS, event.values[0], event.values[1], event.values[2]); break; case Sensor.TYPE_ROTATION_VECTOR: showEventData("Rotation Vector", null, event.values[0], event.values[1], event.values[2]); xAxisLabel.setText("x*sin(" + THETA + "/2)"); yAxisLabel.setText("y*sin(" + THETA + "/2)"); zAxisLabel.setText("z*sin(" + THETA + "/2)"); if (event.values.length == 4) { cosLabel.setVisibility(View.VISIBLE); cos.setVisibility(View.VISIBLE); cos.setText(String.valueOf(event.values[3])); } break; case Sensor.TYPE_ORIENTATION: showEventData("Angle", "Degrees", event.values[0], event.values[1], event.values[2]); xAxisLabel.setText(R.string.azimuthLabel); yAxisLabel.setText(R.string.pitchLabel); zAxisLabel.setText(R.string.rollLabel); break; case Sensor.TYPE_RELATIVE_HUMIDITY: showEventData("Relatice ambient air humidity", "%", event.values[0]); break; case Sensor.TYPE_AMBIENT_TEMPERATURE: showEventData("Ambien temperature", "degree Celcius", event.values[0]); break; } } private void showEventData(String label, String units, float x, float y, float z) { dataLabel.setVisibility(View.VISIBLE); dataLabel.setText(label); if (units == null) { dataUnits.setVisibility(View.GONE); } else { dataUnits.setVisibility(View.VISIBLE); dataUnits.setText("(" + units + "):"); } singleValue.setVisibility(View.GONE); xAxisLabel.setVisibility(View.VISIBLE); xAxisLabel.setText(R.string.xAxisLabel); xAxis.setVisibility(View.VISIBLE); xAxis.setText(String.valueOf(x)); yAxisLabel.setVisibility(View.VISIBLE); yAxisLabel.setText(R.string.yAxisLabel); yAxis.setVisibility(View.VISIBLE); yAxis.setText(String.valueOf(y)); zAxisLabel.setVisibility(View.VISIBLE); zAxisLabel.setText(R.string.zAxisLabel); zAxis.setVisibility(View.VISIBLE); zAxis.setText(String.valueOf(z)); } private void showEventData(String label, String units, float value) { dataLabel.setVisibility(View.VISIBLE); dataLabel.setText(label); dataUnits.setVisibility(View.VISIBLE); dataUnits.setText("(" + units + "):"); singleValue.setVisibility(View.VISIBLE); singleValue.setText(String.valueOf(value)); xAxisLabel.setVisibility(View.GONE); xAxis.setVisibility(View.GONE); yAxisLabel.setVisibility(View.GONE); yAxis.setVisibility(View.GONE); zAxisLabel.setVisibility(View.GONE); zAxis.setVisibility(View.GONE); } /** * @see android.support.v4.app.Fragment#onHiddenChanged(boolean) */ @Override public void onHiddenChanged(boolean hidden) { super.onHiddenChanged(hidden); if (hidden) { if (BuildConfig.DEBUG) { Log.d(TAG, "Unregistering listener"); } sensorManager.unregisterListener(this); } } /** * @see android.support.v4.app.Fragment#onPause() */ @Override public void onPause() { super.onPause(); if (BuildConfig.DEBUG) { Log.d(TAG, "onPause"); Log.d(TAG, "Unregistering listener"); } sensorManager.unregisterListener(this); } }