permission.java

//Sms Permiison
/*
 <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.RECEIVE_SMS" />

*/
//access to permsions
    void CheckUserPermsions(){
      if ( Build.VERSION.SDK_INT >= 23){
                if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) !=
                            PackageManager.PERMISSION_GRANTED  ){
                     requestPermissions(new String[]{
                                        android.Manifest.permission.ACCESS_FINE_LOCATION},
                                REQUEST_CODE_ASK_PERMISSIONS);
                        return ;
                    }
                }

                getLastLocation();// init the contact list
              
    }
    //get acces to location permsion
    final private int REQUEST_CODE_ASK_PERMISSIONS = 123;



    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        switch (requestCode) {
            case REQUEST_CODE_ASK_PERMISSIONS:
                if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    getLastLocation();// init the contact list
                } else {
                    // Permission Denied
                    Toast.makeText( this,"your message" , Toast.LENGTH_SHORT)
                            .show();
                }
                break;
            default:
                super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        }
    }

//Get last location
  public  void getLastLocation(){
  	    LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
  	        Location myLocation=locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
                if (myLocation == null) 
                {
                    myLocation = locationManager.getLastKnownLocation(LocationManager.PASSIVE_PROVIDER);

                }
    }


//read contact list
      public  void getContactList(){
 ArrayList<ListItem> list_contact=new ArrayList<ListItem>() ;
            Cursor cursor = getContentResolver().query( ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null,null, null);
            while (cursor.moveToNext()) {
                String name =cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
                String phoneNumber = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
                list_contact.add(new ListItem(name, phoneNumber));


            }

      }



public class ListItem {
    public String Title;
    public String phoneNumber;
    public ListItem(String Title, String phoneNumber)
    { this. Title=Title;
        this. phoneNumber=phoneNumber;
    }
}



//ratinal permmison
    if (ActivityCompat.shouldShowRequestPermissionRationale(thisActivity,
             android.Manifest.permission.READ_CONTACTS)) {
    }