尝试添加棉花糖权限支持时，java无法解析符号“LocationService”
我正在尝试创建一个GPSTracker类，我可以从一个片段运行它来获取用户的GPS位置。我有一个运行良好，除了它需要愚蠢的棉花糖许可支持（我知道这并不愚蠢，我实际上喜欢它，但它现在是一个害虫）
我收到两条错误消息。一个“无法解析行中的符号“LocationService”
ActivityCompat.requestPermissions( this, new String[] { 安卓.Manifest.permission.ACCESS_COARSE_LOCATION },
LocationService.MY_PERMISSION_ACCESS_COURSE_LOCATION);
另一个“无法解析方法”showAlertDialog（me.paxana.alerta.adapter.GPSTracker、java.lang.String、java.lang.String、boolean）”
排队
public void showAlertDialog(){
am.showAlertDialog(GPSTracker.this, "GPS Setting", "Gps is not enabled. Do you want to enabled it ?", false);
GPSTracker。java
package me.paxana.alerta.adapter;
import 安卓.Manifest;
import 安卓.app.AlertDialog;
import 安卓.app.Service;
import 安卓.content.Context;
import 安卓.content.DialogInterface;
import 安卓.content.Intent;
import 安卓.content.pm.PackageManager;
import 安卓.location.Location;
import 安卓.location.LocationListener;
import 安卓.location.LocationManager;
import 安卓.os.Bundle;
import 安卓.os.IBinder;
import 安卓.provider.Settings;
import 安卓.app.AlertDialog;
import 安卓.support.v4.app.ActivityCompat;
import 安卓.support.v4.content.ContextCompat;
import com.google.安卓.gms.location.LocationListener;
import com.google.安卓.gms.location.LocationRequest;
import com.google.安卓.gms.location.LocationServices;
import 安卓.app.Activity;
import com.afollestad.assent.Assent;
import com.afollestad.assent.Assent.*;
import com.afollestad.assent.AssentActivity;
import com.afollestad.assent.AssentCallback;
import com.afollestad.assent.PermissionResultSet;
public class GPSTracker extends Service implements 安卓.location.LocationListener {
private Context context;
boolean isGPSEnabled = false;
boolean isNetworkEnabled = false;
boolean canGetLocation = false;
Location location;
double latitude,longitude;
LocationManager locationManager;
AlertDialog.Builder am = new AlertDialog.Builder(this);
public GPSTracker(Context context){
this.context = context;
getLocation();
}
private Location getLocation() {
// TODO Auto-generated method stub
if ( ContextCompat.checkSelfPermission( this, 安卓.Manifest.permission.ACCESS_COARSE_LOCATION ) != PackageManager.PERMISSION_GRANTED ) {
ActivityCompat.requestPermissions( this, new String[] { 安卓.Manifest.permission.ACCESS_COARSE_LOCATION },
LocationService.MY_PERMISSION_ACCESS_COURSE_LOCATION);
}
try{
locationManager = (LocationManager)context.getSystemService(Context.LOCATION_SERVICE);
isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled && !isNetworkEnabled){
} else {
this.canGetLocation = true;
if (isNetworkEnabled){
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 60000, 3, this);
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, 60000, 3, this);
if (locationManager != null){
location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null){
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
} else {
showAlertDialog();
}
}
}catch(Exception e){
e.printStackTrace();
}
return location;
}
public void showSettingsAlert(){
AlertDialog.Builder alertDialog = new AlertDialog.Builder(GPSTracker.this);
// Setting Dialog Title
alertDialog.setTitle("GPS is 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);
startActivity(intent);
dialog.cancel();
}
});
// on pressing cancel button
alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
// Showing Alert Message
alertDialog.show();
}
public void showAlertDialog(){
am.showAlertDialog(GPSTracker.this, "GPS Setting", "Gps is not enabled. Do you want to enabled it ?", false);
}
public double getLatitude(){
if (location != null){
latitude = location.getLatitude();
}
return latitude;
}
public double getLongitude(){
if (location != null){
longitude = location.getLongitude();
}
return longitude;
}
public boolean canGetLocation(){
return this.canGetLocation;
}
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
if (location != null){
this.location = location;
}
}
@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 intent) {
// TODO Auto-generated method stub
return null;
}
}
编辑
我想我把第二个换成了
public void showAlertDialog(){
AlertDialog.Builder am = new AlertDialog.Builder(GPSTracker.this);
// Setting Dialog Title
am.setTitle("GPS settings");
// Setting Dialog Message
am.setMessage("GPS is not enabled. Do you want to enable it?");
am.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialogInterface, int i) {
startActivity(new Intent(安卓.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS));
}
});
am.setNegativeButton("No", null);
am .create().show();
# 1 楼答案
在第一个错误中，我相信您只需要
MY_PERMISSION_ACCESS_COURSE_LOCATION而不是LocationService.MY_PERMISSION_ACCESS_COURSE_LOCATION至于第二个错误，通过查看API 23 Documentation，类
AlertDialog.Builder中没有方法showAlertDialog我相信创建对话框的正确方法是使用与
showSettingsAlert()方法相同的方法# 2 楼答案
我从其他地方找到了一个解决方案，首先，只需声明一个变量：
用这个：
这是我的工作，希望对你有帮助