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how to run application in background in android?
如果我的位置纬度和经度等于数据库移动配置文件中的位置应进入静音模式，我正在使用位置管理器进行项目。所以我需要继续使用位置管理器更新我的位置。我做到了。但是如果我关闭我的应用程序，它就无法正常工作。 但是即使我关闭了我的应用程序，我的应用程序也应该可以工作。我尝试使用异步任务在我关闭应用程序时工作，但是在我手动切换到大声模式后它不会更改为静音。当我的应用程序在后台运行时我也应该得到通知..请提前帮助.tks
这是我的代码
public class ShowLocationActivity extends Activity implements LocationListener {
private TextView latituteField;
private TextView longitudeField;
private LocationManager locationManager;
private String provider;
double lat,lng;
Location location;
AudioManager mobilemode ;
private Boolean flag = false;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.location);
latituteField = (TextView) findViewById(R.id.TextView02);
longitudeField = (TextView) findViewById(R.id.TextView04);
mobilemode = (AudioManager) this.getSystemService(Context.AUDIO_SERVICE);
// Get the location manager
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
// Define the criteria how to select the locatioin provider -> use
// default
Criteria criteria = new Criteria();
provider = locationManager.getBestProvider(criteria, false);
location = locationManager.getLastKnownLocation(provider);
// Initialize the location fields
flag = displayGpsStatus();
if (flag) {
if (location != null) {
System.out.println("Provider " + provider + " has been selected.");
onLocationChanged(location);
if((lat==12.905478)&&(lng==80.093358))
{
mobilemode.setRingerMode(AudioManager.RINGER_MODE_VIBRATE);
Toast.makeText(getBaseContext(),"VIBRATE profile activated ",Toast.LENGTH_SHORT).show();
}
else if ((lat==12.90080625)&&(lng==80.09210655))
{
mobilemode.setRingerMode(AudioManager.RINGER_MODE_SILENT);
Toast.makeText(getBaseContext(),"SILENT profile activated !",Toast.LENGTH_SHORT).show();
//notification.setLatestEventInfo(ShowLocationActivity.this, "changed to silent mode", "because u r in office", pendingIntent);
// notificationManager.notify(i, notification);
}
else
{
mobilemode.setRingerMode(AudioManager.RINGER_MODE_NORMAL);
Toast.makeText(getBaseContext(),"LOUD profile activated !",Toast.LENGTH_SHORT).show();
}
}
else {
latituteField.setText("Location not available");
longitudeField.setText("Location not available");
}
}
else {
alertbox("Gps Status!!", "Your GPS is: OFF");
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.location, menu);
return true;
}
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.menu_settings:
Intent intent = new Intent( ShowLocationActivity.this,SetPreference.class);
startActivityForResult(intent, 0);
checkPref();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void checkPref(){
SharedPreferences myPref
= PreferenceManager.getDefaultSharedPreferences(ShowLocationActivity.this);
String _pref =
"Option 1: " + myPref.getBoolean("pref_opt1", true);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
checkPref();
}
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
lat = (double) (location.getLatitude());
lng = (double) (location.getLongitude());
latituteField.setText(String.valueOf(lat));
longitudeField.setText(String.valueOf(lng));
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
Toast.makeText(this, "Disabled provider " + provider,
Toast.LENGTH_SHORT).show();
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
Toast.makeText(this, "Enabled new provider " + provider,
Toast.LENGTH_SHORT).show();
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
@Override
protected void onResume() {
super.onResume();
locationManager.requestLocationUpdates(provider, 400, 1, this);
}
@Override
protected void onPause() {
super.onPause();
locationManager.removeUpdates(this);
}
public void rrr(View v)
{
DownloadTask n= new DownloadTask();
n.doInBackground();
}
public void onDestroy()
{
super.onDestroy();
Log.v("hhh","on destroy");
DownloadTask n= new DownloadTask();
n.doInBackground();
}
public Boolean displayGpsStatus() {
ContentResolver contentResolver = getBaseContext().getContentResolver();
boolean gpsStatus = Settings.Secure.isLocationProviderEnabled(
contentResolver, LocationManager.GPS_PROVIDER);
if (gpsStatus) {
return true;
} else {
return false;
}
}
/*----------Method to create an AlertBox ------------- */
protected void alertbox(String title, String mymessage) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Your Device's GPS is Disable")
.setCancelable(false)
.setTitle("** Gps Status **")
.setPositiveButton("Gps On",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// finish the current activity
// AlertBoxAdvance.this.finish();
Intent myIntent = new Intent(
Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(myIntent);
dialog.cancel();
}
})
.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// cancel the dialog box
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
}
public class DownloadTask extends AsyncTask<Integer, Integer, Void> {
@Override
protected Void doInBackground(Integer... params) {
Log.v("hhh","back");
onCreate(null);
// onLocationChanged(location);
/*
lat = (double) (location.getLatitude());
lng = (double) (location.getLongitude());
latituteField.setText(String.valueOf(lat));
longitudeField.setText(String.valueOf(lng));
if (location != null) {
System.out.println("Provider " + provider + " has been selected.");
onLocationChanged(location);
if((lat==12.905478)&&(lng==80.093358))
{
mobilemode.setRingerMode(AudioManager.RINGER_MODE_VIBRATE);
Toast.makeText(getBaseContext(),"VIBRATE profile activated ",Toast.LENGTH_SHORT).show();
}
else if ((lat==12.90080625)&&(lng==80.09210655))
{
mobilemode.setRingerMode(AudioManager.RINGER_MODE_SILENT);
Toast.makeText(getBaseContext(),"SILENT profile activated !",Toast.LENGTH_SHORT).show();
//notification.setLatestEventInfo(ShowLocationActivity.this, "changed to silent mode", "because u r in office", pendingIntent);
// notificationManager.notify(i, notification);
}
else
{
mobilemode.setRingerMode(AudioManager.RINGER_MODE_NORMAL);
Toast.makeText(getBaseContext(),"LOUD profile activated !",Toast.LENGTH_SHORT).show();
}
}
else {
latituteField.setText("Location not available");
longitudeField.setText("Location not available");
}
// TODO Auto-generated method stub
*/
return null;
}
}
}