MainActivity.java
package com.example.background_shake;
import java.util.List;
import java.util.Locale;
import android.app.Activity;
import android.content.Intent;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
public class MainActivity extends Activity implements OnClickListener {
Button ON,OFF;
private SensorManager sensorManager;
private long lastUpdate;
Intent i1;
public static final String TAG = "ServicesDemo";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
//reseting the window propertys
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
//super method
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ON=(Button)findViewById(R.id.ON);
OFF=(Button)findViewById(R.id.OFF);
ON.setOnClickListener(this);
OFF.setOnClickListener(this);
}
public void onClick(View src) {
switch (src.getId()) {
case R.id.ON:
Log.d(TAG, "onClick: starting srvice");
startService(new Intent(this, Background_service.class));
break;
case R.id.OFF:
Log.d(TAG, "onClick: stopping srvice");
stopService(new Intent(this, Background_service.class));
break;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
Background_service.java
package com.example.background_shake;
import java.util.List;
import java.util.Locale;
import android.app.Service;
import android.content.Intent;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.location.Address;
import android.location.Geocoder;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;
public class Background_service extends Service implements SensorEventListener{
boolean flag=false;
private long lastUpdate;
SensorManager sensorManager;
int count=0;
@Override
public IBinder onBind(Intent intent) {
return null;
}
public void onCreate()
{
flag=true;
Log.d(MainActivity.TAG, "onCreate");
super.onCreate();
}
public void onDestroy() {
flag=false;
Log.d(MainActivity.TAG, "onDestroy");
super.onDestroy();
}
public void onStart(Intent intent, int startId)
{
sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
sensorManager.registerListener(this,
sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
SensorManager.SENSOR_DELAY_NORMAL);
lastUpdate = System.currentTimeMillis();
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
private void getAccelerometer(SensorEvent event) {
if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
float[] values = event.values;
// Movement
float x = values[0];
float y = values[1];
float z = values[2];
double latitude=0;
double longitude=0;
String location_message;
GPSTracker gps;
float accelationSquareRoot = (x * x + y * y + z * z)
/ (SensorManager.GRAVITY_EARTH * SensorManager.GRAVITY_EARTH);
long actualTime = System.currentTimeMillis();
if (accelationSquareRoot >= 2) //
{
if (actualTime - lastUpdate < 2000) {
count++;
return;
}
lastUpdate = actualTime;
{
gps=new GPSTracker(Background_service.this);
if((gps.canGetLocation())&&(count==3)){
count=0;
latitude = gps.getLatitude();
longitude = gps.getLongitude();
// \n is for new line
// Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();
Geocoder gcd = new Geocoder(Background_service.this, Locale.getDefault());
try{
List<Address> addresses = gcd.getFromLocation(latitude, longitude, 1);
location_message= addresses.get(0).getLocality();
if ((addresses.size() > 0)&&(flag))
{
Toast.makeText(getApplicationContext(), "Your Location is " +addresses.get(0).getLocality()
, Toast.LENGTH_LONG).show();
count=0;
}
}catch(Exception e)
{
System.out.print(e);
}
}else{
// can't get location
// GPS or Network is not enabled
// Ask user to enable GPS/network in settings
Toast.makeText(getApplicationContext(), "Switch on gps"
, Toast.LENGTH_LONG).show();
gps.showSettingsAlert();
}}
/*Toast.makeText(this, "Device was shuffed", Toast.LENGTH_SHORT)
.show();
if (color) {
view.setBackgroundColor(Color.GREEN);
} else {
view.setBackgroundColor(Color.RED);
}*/
}}
}
public void onSensorChanged(SensorEvent event) {
getAccelerometer(event);
}
protected void onResume() {
//super.onResume();
// register this class as a listener for the orientation and
// accelerometer sensors
sensorManager.registerListener(this,
sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
SensorManager.SENSOR_DELAY_NORMAL);
}
protected void onPause()
{
// unregister listener
sensorManager.unregisterListener(this);
}
}
上記のコードは、振動パラメーターを感知して現在地を提供するアプリ用です。しかし問題は、GPS がオフになっているにもかかわらず、現在地を取得していることです。
また、私は 2 つのことを知りたいです。2. モバイルを 1 回振るとアプリから出力が得られますが、アプリを 3 ~ 4 回連続して振った場合にのみ目的の結果が得られるようにしたいのですが、それは可能ですか?