A-GPS の助けを借りて GPS 位置を見つけるのに役立つ Android アプリを作成しました。設定から GPS をオンにした後、緯度と経度がゼロより大きくなるまで進行状況ダイアログを実行したいと考えています。私は初心者です。適切に動作しない次のコードを書きました。どんな助けでも大歓迎です
ありがとう
package com.example.gpsutility;
import android.os.Bundle;
import android.app.Activity;
import android.app.ProgressDialog;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class GPSActivity extends Activity implements OnClickListener {
Button search,exit;
TextView location_tv;
GpsService gps;
ProgressDialog progressDialog = null;
double latitude,longitude;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_gps);
search = (Button)findViewById(R.id.search_button);
exit = (Button)findViewById(R.id.exit_button);
location_tv =(TextView)findViewById(R.id.textview2);
gps = new GpsService(this);
search.setOnClickListener(this);
exit.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(v==search)
{
progressDialog = ProgressDialog.show(this, "", "getting location...", true);
new Thread(new Runnable() {
public void run() {
runOnUiThread(new Runnable() {
public void run() {
if(latitude<=0 && longitude<=0)
{
do{
latitude =gps.getLatitude();
longitude = gps.getLongitude();
// location_tv.setText("Location is -\nLat: "+latitude+ "\nLong: "+longitude );
}while(latitude<=0 && longitude<=0);
location_tv.setText(" Location is-\nLat:"+latitude+"\nLong: "+longitude );
progressDialog.dismiss();
}else{
location_tv.setText(" Location is-\nLat:"+latitude+"\nLong: "+longitude );
Log.e("latlong", latitude + ""+longitude);
progressDialog.dismiss();
}
}
});
}
}).start(); }
if(v==exit)
{
finish();
}
}
}
私が使用しているGPS SERVICEクラスは
package com.example.gpsutility;
public class GpsService extends Service implements LocationListener {
private final Context mContext;
boolean isGPSEnabled = false;
boolean isNetworkEnabled = false;
boolean canGetLocation = false;
Location location;
double latitude;
double longitude;
public static final long MIN_DISTANCE_CHANGE_FOR_UPDATES=10;
public static final long MIN_TIME_BW_UPDATES=1000*60*1;
protected LocationManager locationManager;
public GpsService(Context context)
{
this.mContext=context;
getLocation();
}
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
public Location getLocation()
{
try {
locationManager =(LocationManager)
mContext.getSystemService(LOCATION_SERVICE); isGPSEnabled=locationManager.isProviderEnabled(locationManager.GPS_PROVIDER);
isNetworkEnabled = locationManager.isProviderEnabled(locationManager.NETWORK_PROVIDER);
if(!isGPSEnabled || !isNetworkEnabled)
{
showSettingsAlert();
}
else {
this.canGetLocation=true;
if(isNetworkEnabled)
{
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("Network", "Network");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
if (isGPSEnabled) {
if (location == null) {
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("GPS Enabled", "GPS Enabled");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return location;
}
public double getLatitude(){
if(location != null){
latitude = location.getLatitude();
}
// return latitude
return latitude;
}
/**
* Function to get longitude
* */
public double getLongitude(){
if(location != null){
longitude = location.getLongitude();
}
// return longitude
return longitude;
}
public boolean canGetLocation() {
return this.canGetLocation;
}
public void showSettingsAlert(){
AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
// Setting Dialog Title
alertDialog.setTitle("GPS settings");
// Setting Dialog Message
alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");
// Setting Icon to Dialog
//alertDialog.setIcon(R.drawable.delete);
// On pressing Settings button
alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int which) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
mContext.startActivity(intent);
}
});
// on pressing cancel button
alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
// Showing Alert Message
alertDialog.show();
}
}