Custom adapter using listview

First fall create model class.

public class RowItem {

    private String title;
    private String desc;
    private int imageId;

    public RowItem(String title, String desc, int imageId) {
        this.title = title;
        this.desc = desc;
        this.imageId = imageId;
    }

    public int getImageId() {
        return imageId;
    }
    public void setImageId(int imageId) {
        this.imageId = imageId;
    }
    public String getDesc() {
        return desc;
    }
    public void setDesc(String desc) {
        this.desc = desc;
    }
    public String getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
    @Override
    public String toString() {
        return title + "\n" + desc;
    }

}

 Create adapter class

import android.app.Activity;

import android.content.Context;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.ImageView;

import android.widget.TextView;

import java.util.List;

public class CustomBaseAdapter extends BaseAdapter {

    Context context;

    List<RowItem> rowItems;

    public CustomBaseAdapter(Context context, List<RowItem> items) {

        this.context = context;

        this.rowItems = items;

    }

    @Override

    public int getCount() {

        return rowItems.size();

    }

    @Override

    public Object getItem(int position) {

        return rowItems.get(position);

    }

    @Override

    public long getItemId(int position) {

        return rowItems.indexOf(getItem(position));

    }

    @Override

    public View getView(int position, View convertView, ViewGroup viewGroup) {

        ViewHolder holder = null;

        LayoutInflater mInflater = (LayoutInflater)

                context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);

        if (convertView == null) {

            convertView = mInflater.inflate(R.layout.custom_listview_adapter, null);

            holder = new ViewHolder();

            holder.txtDesc = (TextView) convertView.findViewById(R.id.desc);

            holder.txtTitle = (TextView) convertView.findViewById(R.id.title);

            holder.imageView = (ImageView) convertView.findViewById(R.id.icon);

            convertView.setTag(holder);

        }

        else {

            holder = (ViewHolder) convertView.getTag();

        }

        RowItem rowItem = (RowItem) getItem(position);

        holder.txtDesc.setText(rowItem.getDesc());

        holder.txtTitle.setText(rowItem.getTitle());

        holder.imageView.setImageResource(rowItem.getImageId());

        return convertView;

    }

    private class ViewHolder {

        ImageView imageView;

        TextView txtTitle;

        TextView txtDesc;

    }

}

MainActivity class

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity implements AdapterView.OnItemClickListener {

    ListView listView;
    List<RowItem> rowItems;

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

        rowItems = new ArrayList<RowItem>();

        rowItems.add(new RowItem("Jatin","Jatin is android developer",R.mipmap.ic_launcher));
        rowItems.add(new RowItem("Vipul","Vipul is android developer",R.mipmap.ic_launcher));

        listView = (ListView) findViewById(R.id.listView);
        CustomBaseAdapter adapter = new CustomBaseAdapter(this,rowItems);
        listView.setAdapter(adapter);
        listView.setOnItemClickListener(this);
    }

    @Override
    public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
        Toast toast = Toast.makeText(getApplicationContext(),
                "Item " + (position + 1) + ": " + rowItems.get(position),
                Toast.LENGTH_SHORT);
        toast.setGravity(Gravity.BOTTOM|Gravity.CENTER_HORIZONTAL, 0, 0);
        toast.show();

    }

}

Create custom_listview_adapter.xml file

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/icon"
        android:src="@mipmap/ic_launcher"
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:paddingLeft="10dp"
        android:paddingRight="10dp" />

    <TextView
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:paddingBottom="10dp"
        android:textColor="#CC0033"
        android:text="title"
        android:textSize="16dp"
        android:layout_alignParentTop="true"
        android:layout_toRightOf="@+id/icon"
        android:layout_toEndOf="@+id/icon" />

    <TextView
        android:id="@+id/desc"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/title"
        android:layout_toRightOf="@+id/icon"
        android:paddingLeft="10dp"
        android:textColor="#3399FF"
        android:text="description"
        android:textSize="14dp" />

</RelativeLayout>


main_activity xml file 

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity">

    <ListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

</RelativeLayout>

Android Get Current Location And Address

Java File

import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationManager;
import android.os.Build;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AlertDialog;
import android.util.Log;
import android.widget.Toast;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;

import java.io.IOException;
import java.util.List;
import java.util.Locale;

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback, GoogleApiClient.ConnectionCallbacks,
        GoogleApiClient.OnConnectionFailedListener, LocationListener
{
    GoogleMap mGoogleMap;
    SupportMapFragment mapFrag;
    LocationRequest mLocationRequest;
    GoogleApiClient mGoogleApiClient;
    Location mLastLocation;
    Marker mCurrLocationMarker;
    LocationManager locationManager;
    private  Geocoder geocoder;
    private List<Address> addresses;
    String city="";
    String address="";
    String state;
    String country;
    String knownName;
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_maps);

        locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
        {
            checkLocationPermission();
        }
        else
        {
            if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER))
            {
                showGPSDisabledAlertToUser();
            }
        }

        mapFrag = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
        mapFrag.getMapAsync(this);
    }

    private void showGPSDisabledAlertToUser()
    {
        AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);
        alertDialogBuilder.setMessage("GPS is disabled in your device. Would you like to enable it?")
                .setCancelable(false)
                .setPositiveButton("Settings", new DialogInterface.OnClickListener()
                {
                    public void onClick(DialogInterface dialog, int id)
                    {
                        Intent callGPSSettingIntent = new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                        startActivity(callGPSSettingIntent);

                        mapFrag.getMapAsync(MapsActivity.this);
                    }
                });
        alertDialogBuilder.setNegativeButton("Cancel", new DialogInterface.OnClickListener()
        {
            public void onClick(DialogInterface dialog, int id)
            {
                dialog.cancel();
            }
        });
        AlertDialog alert = alertDialogBuilder.create();
        alert.show();
    }

    @Override
    public void onPause()
    {
        super.onPause();

        //stop location updates when Activity is no longer active
        if (mGoogleApiClient != null)
        {
            LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
        }
    }

    @Override
    public void onMapReady(GoogleMap googleMap)
    {
        mGoogleMap=googleMap;
        mGoogleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);

        //Initialize Google Play Services
        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
        {
            if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED)
            {
                buildGoogleApiClient();
                mGoogleMap.setMyLocationEnabled(true);
            }
        }
        else
        {
            buildGoogleApiClient();
            mGoogleMap.setMyLocationEnabled(true);
        }
    }

    protected synchronized void buildGoogleApiClient()
    {
        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(LocationServices.API)
                .build();
        mGoogleApiClient.connect();
    }

    @Override
    public void onConnected(Bundle bundle)
    {
        mLocationRequest = new LocationRequest();
        mLocationRequest.setInterval(1000);
        mLocationRequest.setFastestInterval(1000);
        mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);

        if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED)
        {
            LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
        }
    }

    @Override
    public void onConnectionSuspended(int i) {}

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {}

    @Override
    public void onLocationChanged(Location location)
    {
        mLastLocation = location;
        if (mCurrLocationMarker != null)
        {
            mCurrLocationMarker.remove();
        }

        geocoder = new Geocoder(this, Locale.getDefault());
        try {
            addresses = geocoder.getFromLocation(location.getLatitude(), location.getLongitude(),1);
            address = addresses.get(0).getAddressLine(0); // If any additional address line present than only, check with max available address lines by getMaxAddressLineIndex()
            city = addresses.get(0).getLocality();
            state = addresses.get(0).getAdminArea();
            country = addresses.get(0).getCountryName();
            knownName = addresses.get(0).getFeatureName();
            String phone = addresses.get(0).getPhone();
            Toast.makeText(MapsActivity.this, "\n" + address + "\n" + city + "\n" + state + "\n" + country + "\n"  + "\n" + knownName, Toast.LENGTH_LONG).show();
            Log.d("Location6", knownName);
        } catch (IOException e) {
            e.printStackTrace();
        }

        //Place current location marker
        LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
        MarkerOptions markerOptions = new MarkerOptions();
        markerOptions.position(latLng);
        markerOptions.title(address+","+city+","+state+","+country);
        markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_YELLOW));
        mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);

        //move map camera
        mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
        mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(11));

        //stop location updates
        if (mGoogleApiClient != null)
        {
            LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
        }
    }

    public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;

    public boolean checkLocationPermission()
    {
        if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED)
        {
            // Should we show an explanation?
            if (ActivityCompat.shouldShowRequestPermissionRationale(this, android.Manifest.permission.ACCESS_FINE_LOCATION))
            {
                // Show an expanation to the user *asynchronously* -- don't block
                // this thread waiting for the user's response! After the user
                // sees the explanation, try again to request the permission.

                //Prompt the user once explanation has been shown
                ActivityCompat.requestPermissions(this, new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION},
                        MY_PERMISSIONS_REQUEST_LOCATION);
            }
            else
            {
                // No explanation needed, we can request the permission.
                ActivityCompat.requestPermissions(this, new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION},
                        MY_PERMISSIONS_REQUEST_LOCATION);
            }
            return false;
        }
        else
        {
            if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER))
            {
                showGPSDisabledAlertToUser();
            }

            return true;
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults)
    {
        switch (requestCode)
        {
            case MY_PERMISSIONS_REQUEST_LOCATION:
            {
                // 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.
                    if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED)
                    {

                        if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER))
                        {
                            showGPSDisabledAlertToUser();
                        }

                        if (mGoogleApiClient == null)
                        {
                            buildGoogleApiClient();
                        }
                        mGoogleMap.setMyLocationEnabled(true);
                    }
                }
                else
                {
                    // permission denied, boo! Disable the
                    // functionality that depends on this permission.
                    Toast.makeText(this, "permission denied", Toast.LENGTH_LONG).show();
                }
                return;
            }
            // other 'case' lines to check for other
            // permissions this app might request
        }
    }
}




Xml File

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:map="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/map"
    android:name="com.google.android.gms.maps.SupportMapFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"

    tools:context=".MapsActivity" />


Give permission in manifest

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

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


google_maps_api.xml(debug)

<resources>
    <!--
    TODO: Before you run your application, you need a Google Maps API key.

    To get one, follow this link, follow the directions and press "Create" at the end:



    Alternatively, follow the directions here:
    https://developers.google.com/maps/documentation/android/start#get-key

    Once you have your key (it starts with "AIza"), replace the "google_maps_key"
    string in this file.
    -->
    <string name="google_maps_key" templateMergeStrategy="preserve" translatable="false">This is your google api key </string>

</resources>

Snackbar in android

Custom Snackbar
1) how we can change background color and change text color of Snack bar.this is simple code to change text color and background of snackBar




Snackbar snackbar = Snackbar.make(view, "This is Testing", Snackbar.LENGTH_LONG);
View snackBarView = snackbar.getView();
TextView tv = (TextView) snackBarView.findViewById(android.support.design.R.id.snackbar_text);
tv.setTextColor(ContextCompat.getColor(MainActivity.this, R.color.colorAccent));
snackBarView.setBackgroundColor(ContextCompat.getColor(MainActivity.this, R.color.colorPrimaryDark));
snackbar.show();