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/*
* Copyright (C) 2013 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.example.android.apis.os;
import android.app.Activity;
import android.content.Context;
import android.view.View;
import android.hardware.Sensor;
import android.hardware.TriggerEvent;
import android.hardware.TriggerEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.widget.TextView;
import com.example.android.apis.R;
/**
* <h3>Application showing the Trigger Sensor API for the Significant Motion sensor. </h3>
<p>This demonstrates the {@link android.hardware.SensorManager android.hardware.SensorManager
android.hardware.TriggerEventListener} class.
<h4>Demo</h4>
OS / TriggerSensors
<h4>Source files</h4>
* <table class="LinkTable">
* <tr>
* <td >src/com.example.android.apis/os/TriggerSensors.java</td>
* <td >TriggerSensors</td>
* </tr>
* </table>
*/
class TriggerListener extends TriggerEventListener {
private Context mContext;
private TextView mTextView;
TriggerListener(Context context, TextView textView) {
mContext = context;
mTextView = textView;
}
@Override
public void onTrigger(TriggerEvent event) {
if (event.values[0] == 1) {
mTextView.append(mContext.getString(R.string.sig_motion) + "\n");
mTextView.append(mContext.getString(R.string.sig_motion_auto_disabled) + "\n");
}
// Sensor is auto disabled.
}
}
public class TriggerSensors extends Activity {
private SensorManager mSensorManager;
private Sensor mSigMotion;
private TriggerListener mListener;
private TextView mTextView;
@Override
protected void onResume() {
super.onResume();
if (mSigMotion != null && mSensorManager.requestTriggerSensor(mListener, mSigMotion))
mTextView.append(getString(R.string.sig_motion_enabled) + "\n");
}
@Override
protected void onPause() {
super.onPause();
// Call disable only if needed for cleanup.
// The sensor is auto disabled when triggered.
if (mSigMotion != null) mSensorManager.cancelTriggerSensor(mListener, mSigMotion);
}
/**
* Initialization of the Activity after it is first created. Must at least
* call {@link android.app.Activity#setContentView setContentView()} to
* describe what is to be displayed in the screen.
*/
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.trigger_sensors);
mSensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
mSigMotion = mSensorManager.getDefaultSensor(Sensor.TYPE_SIGNIFICANT_MOTION);
mTextView = (TextView)findViewById(R.id.text);
mListener = new TriggerListener(this, mTextView);
if (mSigMotion == null) {
mTextView.append(getString(R.string.no_sig_motion) + "\n");
}
}
@Override
protected void onStop() {
if (mSigMotion != null) mSensorManager.cancelTriggerSensor(mListener, mSigMotion);
super.onStop();
}
}
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