代码在我的手机中正常工作，但有时无效。此外，此代码在其他手机中无法正常使用。我已多次尝试过。在通过xender发送此应用程序的apk文件时，安装失败。请帮助改进我的代码，以便在打开位置时在所有手机中正常工作。
Mainactivity.java
public class MainActivity extends AppCompatActivity {
TextView result;
Double latitude, longitude;
Geocoder geocoder;
List<Address> addressList;
Getgps gps;
Context mContext;
protected LocationManager locationManager;
boolean isGPSEnabled = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
result = (TextView) findViewById(R.id.abcd);
geocoder = new Geocoder(this, Locale.getDefault());
mContext = this;
try
{
locationManager = (LocationManager) mContext.getSystemService(LOCATION_SERVICE);
isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
if (isGPSEnabled)
{
getlonglat(); //check location
if(CheckInternetConnection(MainActivity.this)) {
getaddress();
// getlocation
if(result.getText().toString().matches(""))
{
Toast.makeText(mContext, "Poor Internet Connection", Toast.LENGTH_SHORT).show();
}
}
else
{
Toast.makeText(getApplicationContext(),"No internet Connection",Toast.LENGTH_LONG).show();
}
}
else
{
Toast.makeText(getApplicationContext(),"Turn ON Your Location",Toast.LENGTH_LONG).show();
showgpsSettingsAlert();
startActivity(new Intent(MainActivity.this, Main2Activity.class));
Toast.makeText(mContext, " after delay khatey", Toast.LENGTH_SHORT).show();
}
}
catch (Exception e) {
e.printStackTrace();
}
}
public void getlonglat() {
if (ContextCompat.checkSelfPermission(mContext,
Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED
&& ActivityCompat.checkSelfPermission(mContext,
Manifest.permission.ACCESS_COARSE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);
}
else {
Toast.makeText(mContext, "GPS Permission Granted", Toast.LENGTH_SHORT).show();
gps = new Getgps(mContext, MainActivity.this);
// Check if GPS enabled
if (gps.canGetLocation()) {
latitude = gps.getLatitude();
longitude = gps.getLongitude();
Toast.makeText(getApplicationContext(), "Your Location is - \nLatitude: " + latitude + "\nLongitude: " + longitude, Toast.LENGTH_LONG).show();
}
}
}
public void getaddress() {
try {
addressList = geocoder.getFromLocation(latitude, longitude, 1);
String address = addressList.get(0).getAddressLine(0);
String area = addressList.get(0).getLocality();
String city = addressList.get(0).getAdminArea();
String country = addressList.get(0).getCountryName();
String postalcode = addressList.get(0).getPostalCode();
String fullAddress = address + ", " + area + ", " + city + ", " + country + ", " + postalcode;
Toast.makeText(mContext, "Internet Permission Granted", Toast.LENGTH_SHORT).show();
result.setText(fullAddress);
}
catch (IOException e) {
e.printStackTrace();
}
}
public static boolean CheckInternetConnection(Context context) {
ConnectivityManager connectivity =
(ConnectivityManager) context.getSystemService(
Context.CONNECTIVITY_SERVICE);
if (connectivity != null) {
NetworkInfo[] info = connectivity.getAllNetworkInfo();
if (info != null)
for (int i = 0; i < info.length; i++)
if (info[i].getState() == NetworkInfo.State.CONNECTED) {
return true;
}
}
return false;
}
public void showgpsSettingsAlert() {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
alertDialog.setCancelable(false);
this.setFinishOnTouchOutside(false);
alertDialog.setTitle("GPS Setting");
alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");
alertDialog.setPositiveButton("OK ", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
mContext.startActivity(intent);
}
});
alertDialog.setNegativeButton("Cancel ", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
Toast.makeText(mContext, "Sorry we cannot proceed", Toast.LENGTH_SHORT).show();
}
});
alertDialog.show();// Showing Alert Message
}
}
Getgps.java
package com.example.bibash28.locationfinal2;
/**
* Created by Bibash28 on 11/3/2017.
*/
public class Getgps extends Service
{
private Context mContext; // Flag for GPS status
boolean isGPSEnabled = false; // Flag for network status
boolean canGetLocation = false;
Location location; // Location
Double latitude,longitude;
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 1000;// The minimum distance to change Updates in meters
private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1;// 10 meters// The minimum time between updates in milliseconds// 1 minute
Activity activity;
protected LocationManager locationManager;
public Getgps(Context context, Activity activity)
{
this.mContext = context;
this.activity = activity;
getLocation();
}
public Location getLocation()
{
try
{
locationManager = (LocationManager) mContext.getSystemService(LOCATION_SERVICE);
// Getting GPS status
isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
// If GPS enabled, get latitude/longitude using GPS Services
this.canGetLocation = true;
if (isGPSEnabled) {
if (location == null) {
if (ContextCompat.checkSelfPermission(activity,
Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(activity, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(activity, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 50);
} else {
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, mLocationListener);
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;
}
private final LocationListener mLocationListener = new LocationListener() {
@Override
public void onLocationChanged(final Location location) {
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
};
//Function to get latitude
public double getLatitude() {
if (location != null) {
latitude = location.getLatitude();
}
return latitude;
}
// Function to get longitude
public double getLongitude() {
if (location != null) {
longitude = location.getLongitude();
}
return longitude;
}
//Function to check GPS/Wi-Fi enabled @return boolean
public boolean canGetLocation()
{
return this.canGetLocation;
}
@Override
public IBinder onBind(Intent arg0) {
return null;
}
}