RecyclerView scroll checkbox auto select issue solution

if(classModelList.get(myViewHolder.getAdapterPosition()).isCheckBoxStatus())
    myViewHolder.classCB.setChecked(true);
else    myViewHolder.classCB.setChecked(false);

myViewHolder.classCB.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
    @Override    public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
        if (b) {
            classModelList.get(myViewHolder.getAdapterPosition()).setCheckBoxStatus(true);
            //listAllListeners.onItemCheck(holder.checkBoxTime.getText().toString(), holder.getAdapterPosition());        }
        else {
            classModelList.get(myViewHolder.getAdapterPosition()).setCheckBoxStatus(false);
            //listAllListeners.onItemUncheck(holder.checkBoxTime.getText().toString(), holder.getAdapterPosition());        }
    }
});

Shadow effect Elevation

<LinearLayout    android:layout_width="match_parent"    android:layout_height="200dp"    android:layout_gravity="center"    android:gravity="center"    android:layout_margin="20dp"    android:elevation="10dp"    android:clickable="true"    android:background="@drawable/ripple_effect2"    >
</LinearLayout>

<TextView    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="Elevation Example"    android:layout_gravity="center"    android:gravity="center"    android:elevation="5dp"    android:padding="20dp"    android:layout_marginTop="20dp"    android:layout_marginBottom="20dp"    android:background="@drawable/ripple_effect"    android:clickable="true"    ></TextView>

<?xml version="1.0" encoding="utf-8"?><ripple xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:color="#dddddd"    tools:targetApi="lollipop">

    <item android:id="@android:id/background">
        <shape xmlns:android="http://schemas.android.com/apk/res/android"            android:shape="rectangle">
            <solid android:color="#FFFFFF" />
            <stroke                android:width="3dp"                android:color="#FFFFFF" />
            <corners android:bottomLeftRadius="15dp"                android:topLeftRadius="15dp"                android:bottomRightRadius="15dp"                android:topRightRadius="15dp" />
            <padding                android:bottom="0dp"                android:left="0dp"                android:right="0dp"                android:top="0dp" />
        </shape>
    </item>
</ripple>

Get Full Address From Latitude and Longitude Android Google Map

Get Full Address From Latitude and Longitude Android Google Map

String zipCode = getZipCode(MapsActivity.this,arg0.latitude,arg0.longitude);
Toast.makeText(MapsActivity.this,""+zipCode,Toast.LENGTH_LONG).show();

public String getZipCode(Context c, double lat, double lng){
    String fullAdd = null;
    String locality = null;
    String zip = null;
    String country = null;
    try {
        Geocoder geocoder = new Geocoder(c,Locale.getDefault());
        List<Address> addresses = geocoder.getFromLocation(lat,lng,1);
        if (addresses.size()>0){
            Address address = addresses.get(0);
            fullAdd = address.getAddressLine(0);  // full Address  
            locality = address.getLocality();
            zip = address.getPostalCode();
            country = address.getCountryName();
        }

    }catch (IOException ex){
        ex.printStackTrace();
    }
    return zip;
}

SMS Permission Run time Android Studio

AndroidManifest.xml

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

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

MainActivity.java

package com.sjt.smspermissionruntime;




import android.Manifest;

import android.content.DialogInterface;

import android.content.pm.PackageManager;

import android.support.v4.app.ActivityCompat;

import android.support.v4.content.ContextCompat;

import android.support.v7.app.AlertDialog;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.util.Log;




import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;




public class MainActivity extends AppCompatActivity {

    public static final int REQUEST_ID_MULTIPLE_PERMISSIONS = 1;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);




        if (checkAndRequestPermissions()) {

            // carry on the normal flow, as the case of  permissions  granted.

            // Toast.makeText(SignUp.this,"Granted",Toast.LENGTH_LONG).show();

        }







    }




    private  boolean checkAndRequestPermissions() {

        int permissionSendMessage = ContextCompat.checkSelfPermission(this,

                Manifest.permission.READ_SMS);

        int locationPermission = ContextCompat.checkSelfPermission(this, Manifest.permission.RECEIVE_SMS);

        List<String> listPermissionsNeeded = new ArrayList<>();

        if (locationPermission != PackageManager.PERMISSION_GRANTED) {

            listPermissionsNeeded.add(Manifest.permission.READ_SMS);

        }

        if (permissionSendMessage != PackageManager.PERMISSION_GRANTED) {

            listPermissionsNeeded.add(Manifest.permission.RECEIVE_SMS);

        }

        if (!listPermissionsNeeded.isEmpty()) {

            ActivityCompat.requestPermissions(this,

 listPermissionsNeeded.toArray(new String[listPermissionsNeeded.size()]),

                    REQUEST_ID_MULTIPLE_PERMISSIONS);

            return false;

        }

        return true;

    }

    @Override

    public void onRequestPermissionsResult(int requestCode,

                                           String permissions[], int[] grantResults) {

        Log.d("Permission", "Permission callback called-------");

        switch (requestCode) {

            case REQUEST_ID_MULTIPLE_PERMISSIONS: {




                Map<String, Integer> perms = new HashMap<>();

                // Initialize the map with both permissions

                perms.put(Manifest.permission.READ_SMS, PackageManager.PERMISSION_GRANTED);

                perms.put(Manifest.permission.RECEIVE_SMS, PackageManager.PERMISSION_GRANTED);

                // Fill with actual results from user

                if (grantResults.length > 0) {

                    for (int i = 0; i < permissions.length; i++)

                        perms.put(permissions[i], grantResults[i]);

                    // Check for both permissions

                    if (perms.get(Manifest.permission.READ_SMS) == PackageManager.PERMISSION_GRANTED

                            && perms.get(Manifest.permission.RECEIVE_SMS) == PackageManager.PERMISSION_GRANTED) {

                        Log.d("sms", "READ_SMS & RECEIVE_SMS services permission granted");

                        // process the normal flow

                        //else any one or both the permissions are not granted

                    } else {

                        Log.d("Some", "Some permissions are not granted ask again ");

                        //permission is denied (this is the first time, when "never ask again" is not checked) so ask again explaining the usage of permission

//                        // shouldShowRequestPermissionRationale will return true

                        //show the dialog or snackbar saying its necessary and try again otherwise proceed with setup.

                        if (ActivityCompat.shouldShowRequestPermissionRationale(this,

                                Manifest.permission.READ_SMS) ||

                                ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.RECEIVE_SMS)) {

                            showDialogOK("READ_SMS and RECEIVE_SMS Services Permission required for this app",

                                    new DialogInterface.OnClickListener() {

                                        @Override

                                        public void onClick(DialogInterface dialog, int which) {

                                            switch (which) {

                                                case DialogInterface.BUTTON_POSITIVE:

                                                    checkAndRequestPermissions();

                                                    break;

                                                case DialogInterface.BUTTON_NEGATIVE:

                                                    // proceed with logic by disabling the related features or quit the app.

                                                    break;

                                            }

                                        }

                                    });

                        }

                        //permission is denied (and never ask again is  checked)

                        //shouldShowRequestPermissionRationale will return false

                        else {

                            //  Toast.makeText(this, "Go to settings and enable permissions", Toast.LENGTH_LONG).show();

                            //                            //proceed with logic by disabling the related features or quit the app.

                        }

                    }

                }

            }

        }

    }




    private void showDialogOK(String message, DialogInterface.OnClickListener okListener) {

        new AlertDialog.Builder(this)

                .setMessage(message)

                .setPositiveButton("OK", okListener)

                .setNegativeButton("Cancel", okListener)

                .create()

                .show();

    }




}

How to get key hash for Facebook login android.

Put this code inside onCreate 

How to convert GPS Coordinates ( Latitude and Longitude ) to Address in Android.

Manifest

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

activity.gps.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
 xmlns:android="http://schemas.android.com/apk/res/android" 
 xmlns:app="http://schemas.android.com/apk/res-auto"   
 xmlns:tools="http://schemas.android.com/tools"    
  android:layout_width="match_parent"   
  android:layout_height="match_parent"  
  android:orientation="vertical"   
  tools:context="raj.sujeet.com.example.GPSActivity"    

  android:weightSum="1">




    <Button   

     android:id="@+id/getLL"      
  android:layout_width="match_parent"       
 android:layout_height="wrap_content"      
  android:text="get Lati/long"       
 tools:layout_editor_absoluteX="39dp"      
  tools:layout_editor_absoluteY="28dp"        
android:layout_marginTop="10dp"        
tools:ignore="MissingConstraints"       

 android:layout_weight="0.01" />

    <EditText        



android:id="@+id/latitude"      
  android:layout_marginTop="10dp"      
  android:layout_width="match_parent" 
       android:layout_height="wrap_content" />

    <EditText     
   android:id="@+id/longitude"    
    android:layout_marginTop="10dp"    
    android:layout_width="match_parent"   
     android:layout_height="wrap_content" />

    <Button        
android:id="@+id/getLocation" 
       android:layout_marginTop="20dp"
        android:layout_width="match_parent"  
      android:layout_height="wrap_content"  
      android:text="get location"        />

    <TextView  
      android:layout_margin="10dp" 
       android:id="@+id/result"  
      android:layout_width="wrap_content" 
       android:layout_height="wrap_content"        />

</LinearLayout>









GPSActivity.java


public class GPSActivity extends AppCompatActivity {

    Button getLL,getlocation;
    EditText latitudeLL,longitudeLL;

    String lati,longi;

    TextView result;
    Geocoder geocoder;
    List<Address> addressList;

    // GPSTracker class    GPSTracker gps;

    Context mContext;

    double latitude,longitude;

    @Override    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_gps);

        result = (TextView)findViewById(R.id.result);
        geocoder = new Geocoder(this, Locale.getDefault());


        latitudeLL = (EditText)findViewById(R.id.latitude);
        longitudeLL = (EditText)findViewById(R.id.longitude);

        getlocation = (Button)findViewById(R.id.getLocation);

        mContext = this;

        getLL = (Button)findViewById(R.id.getLL);
        getLL.setOnClickListener(new View.OnClickListener() {
            @Override            public void onClick(View view) {


                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(GPSActivity.this,
                            new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);

                } else {
                    Toast.makeText(mContext, "You need have granted permission",
 Toast.LENGTH_SHORT).show();
                    gps = new GPSTracker(mContext, GPSActivity.this);

                    // Check if GPS enabled                 
   if (gps.canGetLocation()) {

                         latitude = gps.getLatitude();
                        longitude = gps.getLongitude();

                        // \n is for new line         
               Toast.makeText(getApplicationContext(),
                                "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();
                         lati = Double.toString(latitude);
                         longi = Double.toString(longitude);
                        latitudeLL.setText(lati);
                        longitudeLL.setText(longi);
                    } else {
                        // Can't get location.                  
      // GPS or network is not enabled.                      
  // Ask user to enable GPS/network in settings.          
              gps.showSettingsAlert();
                    }
                }

            }
        });

        getlocation.setOnClickListener(new View.OnClickListener() {
            @Override            public void onClick(View view) {
                try {
                    addressList = geocoder.getFromLocation(latitude,longitude,1);

                    String addressStr = addressList.get(0).getAddressLine(0);
                    String areaStr = addressList.get(0).getLocality();
                    String cityStr = addressList.get(0).getAdminArea();
                    String countryStr = addressList.get(0).getCountryName();
                    String postalcodeStr = addressList.get(0).getPostalCode();

                    String fullAddress = addressStr+", "+areaStr+", "+cityStr+", "+countryStr+", "+postalcodeStr;

                    result.setText(fullAddress);

                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        });

    }

    @Override    public void onRequestPermissionsResult(int requestCode, String[] permissions,
 int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);

        switch (requestCode) {
            case 1: {
                // If request is cancelled, the result arrays are empty.       
         if (grantResults.length > 0                   
     && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                    // permission was granted, yay! Do the
                    // contacts-related task you need to do.
                    gps = new GPSTracker(mContext, GPSActivity.this);

                    // Check if GPS enabled                   
 if (gps.canGetLocation()) {

                        double latitude = gps.getLatitude();
                        double longitude = gps.getLongitude();

                        // \n is for new line                    
    Toast.makeText(getApplicationContext(),
                                "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();
                    } else {
                        // Can't get location.                       
 // GPS or network is not enabled.                       
 // Ask user to enable GPS/network in settings.                       
 gps.showSettingsAlert();
                    }

                } else {

                    // permission denied, boo! Disable the                   
 // functionality that depends on this permission.
                    Toast.makeText(mContext, "You need to grant permission",
 Toast.LENGTH_SHORT).show();
                }
                return;
            }
        }
    }
}




GPSTracker.java


package raj.sujeet.com.example;

import android.Manifest;
import android.app.Activity;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AlertDialog;
import android.util.Log;

/** * Created by Sujeet Raj on 09-07-2017. */
public class GPSTracker extends Service {

    private Context mContext;

    // Flag for GPS status    
boolean isGPSEnabled = false;

    // Flag for network status   
 boolean isNetworkEnabled = false;

    // Flag for GPS status  
  boolean canGetLocation = false;

    Location location; 
// Location  
  double latitude;
 // Latitude   
 double longitude; 
// Longitude
    // The minimum distance to change Updates in meters   
 private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 1000; 
// 10 meters
    // The minimum time between updates in milliseconds  
  private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; 
// 1 minute
    // Declaring a Location Manager    protected LocationManager locationManager;

    Activity activity;

    public GPSTracker() {
    }

    public GPSTracker(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);

            // Getting network status          
  isNetworkEnabled = locationManager                    
.isProviderEnabled(LocationManager.NETWORK_PROVIDER);

            if (!isGPSEnabled && !isNetworkEnabled) {
                // No network provider is enabled          
  } else {
                this.canGetLocation = true;
                if (isNetworkEnabled) {
                    int requestPermissionsCode = 50;

                    locationManager.requestLocationUpdates(
                            LocationManager.NETWORK_PROVIDER,
                            MIN_TIME_BW_UPDATES,
                            MIN_DISTANCE_CHANGE_FOR_UPDATES, mLocationListener);
                    Log.d("Network", "Network");
                    if (locationManager != null) {
                        location = locationManager                             
   .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                        if (location != null) {
                            latitude = location.getLatitude();
                            longitude = location.getLongitude();
                        }
                    }
                }
            }
            // If GPS enabled, get latitude/longitude using GPS Services      
      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;
    }


    /**     * Stop using GPS listener    
 * Calling this function will stop using GPS in your app.    
 */   
 public void stopUsingGPS() {

    }


    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      
  return latitude;
    }


    /**     * Function to get longitude    
 */   
 public double getLongitude() {
        if (location != null) {
            longitude = location.getLongitude();
        }

        // return longitude       
 return longitude;
    }

    /**     * Function to check GPS/Wi-Fi enabled     *   
  * @return boolean     */   
 public boolean canGetLocation() {
        return this.canGetLocation;
    }


    /**     * Function to show settings alert dialog.    
 * On pressing the Settings button it will launch Settings Options.     */ 
 
  public void showSettingsAlert() {
        AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);

        // 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?");

        // On pressing the 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 the cancel button     
   alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                dialog.cancel();
            }
        });

        // Showing Alert Message      
  alertDialog.show();
    }


    @Override    public IBinder onBind(Intent arg0) {
        return null;
    }
}