Android run time location permission in android 6.0 and above.

import android.Manifest;
import android.app.Activity;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.design.widget.Snackbar;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements View.OnClickListener{

    private Context context;
    private Activity activity;
    private static final int PERMISSION_REQUEST_CODE = 1;
    private View view;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        context = getApplicationContext();
        activity = this;
        Button check_permission = (Button)findViewById(R.id.check_permission);
        Button request_permission = (Button)findViewById(R.id.request_permission);
        check_permission.setOnClickListener(this);
        request_permission.setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {

        view = v;

        int id = v.getId();
        switch (id){
            case R.id.check_permission:
                if (checkPermission()) {

                    Snackbar.make(view,"Permission already granted.",Snackbar.LENGTH_LONG).show();

                } else {

                    Snackbar.make(view,"Please request permission.",Snackbar.LENGTH_LONG).show();
                }
                break;
            case R.id.request_permission:
                if (!checkPermission()) {

                    requestPermission();

                } else {

                    Snackbar.make(view,"Permission already granted.",Snackbar.LENGTH_LONG).show();

                }
                break;
        }
    }

    private boolean checkPermission(){
        int result = ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION);
        if (result == PackageManager.PERMISSION_GRANTED){

            return true;

        } else {

            return false;

        }
    }

    private void requestPermission(){

        if (ActivityCompat.shouldShowRequestPermissionRationale(activity,Manifest.permission.ACCESS_FINE_LOCATION)){

            Toast.makeText(context,"GPS permission allows us to access location data. Please allow in App Settings for additional functionality.",Toast.LENGTH_LONG).show();

        } else {

            ActivityCompat.requestPermissions(activity,new String[]{Manifest.permission.ACCESS_FINE_LOCATION},PERMISSION_REQUEST_CODE);
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
        switch (requestCode) {
            case PERMISSION_REQUEST_CODE:
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                    Snackbar.make(view,"Permission Granted, Now you can access location data.",Snackbar.LENGTH_LONG).show();

                } else {

                    Snackbar.make(view,"Permission Denied, You cannot access location data.",Snackbar.LENGTH_LONG).show();

                }
                break;
        }
    }
}

runtime location permission

MainActivity.java:



package com.chantisandroid.sample;



import android.Manifest;

import android.app.AlertDialog;

import android.content.Context;

import android.content.DialogInterface;

import android.content.Intent;

import android.content.pm.PackageManager;

import android.location.Location;

import android.location.LocationManager;

import android.provider.Settings;

import android.support.v4.app.ActivityCompat;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.TextView;

import android.widget.Toast;



public class MainActivity extends AppCompatActivity implements View.OnClickListener {



    private static final int REQUEST_LOCATION = 1;

    Button button;

    TextView textView;

    LocationManager locationManager;

    String lattitude,longitude;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);



        ActivityCompat.requestPermissions(this, new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION}, REQUEST_LOCATION);



        textView = (TextView)findViewById(R.id.text_location);

        button = (Button)findViewById(R.id.button_location);



        button.setOnClickListener(this);



    }



    @Override

    public void onClick(View view) {

        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

        if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {

            buildAlertMessageNoGps();



        } else if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {

            getLocation();

        }

    }



    private void getLocation() {

        if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_FINE_LOCATION)

                != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission

                (MainActivity.this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {



            ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, REQUEST_LOCATION);



        } else {

            Location location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

            Location location1 = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

           Location location2 = locationManager.getLastKnownLocation(LocationManager. PASSIVE_PROVIDER);



            if (location != null) {

                double latti = location.getLatitude();

                double longi = location.getLongitude();

                lattitude = String.valueOf(latti);

                longitude = String.valueOf(longi);



                textView.setText("Your current location is"+ "\n" + "Lattitude = " + lattitude

                + "\n" + "Longitude = " + longitude);


            } else  if (location1 != null) {

                double latti = location1.getLatitude();

                double longi = location1.getLongitude();

                lattitude = String.valueOf(latti);

                longitude = String.valueOf(longi);



                textView.setText("Your current location is"+ "\n" + "Lattitude = " + lattitude

                + "\n" + "Longitude = " + longitude);


               


            } else  if (location2 != null) {


                double latti = location2.getLatitude();

                double longi = location2.getLongitude();

                lattitude = String.valueOf(latti);

                longitude = String.valueOf(longi);



                textView.setText("Your current location is"+ "\n" + "Lattitude = " + lattitude

                + "\n" + "Longitude = " + longitude);


               

            }else{

               Toast.makeText(this,"Unble to Trace your location",Toast.LENGTH_SHORT).show();

             }


        }

    }



    protected void buildAlertMessageNoGps() {



        final AlertDialog.Builder builder = new AlertDialog.Builder(this);

        builder.setMessage("Please Turn ON your GPS Connection")

                .setCancelable(false)

                .setPositiveButton("Yes", new DialogInterface.OnClickListener() {

                    public void onClick(final DialogInterface dialog, final int id) {

                        startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS));

                    }

                })

                .setNegativeButton("No", new DialogInterface.OnClickListener() {

                    public void onClick(final DialogInterface dialog, final int id) {

                        dialog.cancel();

                    }

                });

        final AlertDialog alert = builder.create();

        alert.show();

    }



}






AndroidManifest.xml:


<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.chantisandroid.sample">




    <uses-permission android:name="android.permission.INTERNET"/>

    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />




    <application

        android:allowBackup="true"

        android:icon="@mipmap/ic_launcher"

        android:label="@string/app_name"

        android:roundIcon="@mipmap/ic_launcher_round"

        android:supportsRtl="true"

        android:theme="@style/AppTheme">

        <activity android:name=".MainActivity">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />




                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>




</manifest>