gistfile1.txt

package com.roy.multiselect;

import android.database.Cursor;
import android.database.MatrixCursor;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;

import com.roy.adapter.ContactAdapter;

import butterknife.Bind;
import butterknife.ButterKnife;

public class MainActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener,LoaderManager.LoaderCallbacks<Cursor> {

    ContactAdapter adapter;
    @Bind(R.id.recyclerview)
    RecyclerView recyclerView;
    private static final int LOADER_SEARCH_RESULTS = 1;
     String[] projectionFields;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ButterKnife.bind(this);

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.setDrawerListener(toggle);
        toggle.syncState();

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
        recyclerView.setLayoutManager(linearLayoutManager);
        getSupportLoaderManager().initLoader(LOADER_SEARCH_RESULTS, null, this);
    }

    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        int id = item.getItemId();

        if (id == R.id.nav_camera) {
            // Handle the camera action
        } else if (id == R.id.nav_gallery) {

        } else if (id == R.id.nav_slideshow) {

        } else if (id == R.id.nav_manage) {

        } else if (id == R.id.nav_share) {

        } else if (id == R.id.nav_send) {

        }

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }

    @Override
    public Loader<Cursor> onCreateLoader(int id, Bundle args) {
        switch (id) {
            case LOADER_SEARCH_RESULTS:

            projectionFields  = new String[]{
                        ContactsContract.Contacts._ID,
                        ContactsContract.Contacts.DISPLAY_NAME,
                        ContactsContract.Contacts.HAS_PHONE_NUMBER,
                        ContactsContract.CommonDataKinds.Phone.NUMBER,
                        ContactsContract.CommonDataKinds.Phone.PHOTO_URI,
                        ContactsContract.Data.LOOKUP_KEY
                };

                final String whereClause = ContactsContract.Contacts.HAS_PHONE_NUMBER + "='1'";
                final String sortOrder = ContactsContract.Contacts.DISPLAY_NAME + " ASC";
                // Construct the loader
                CursorLoader cursorLoader = new CursorLoader(this,
                        ContactsContract.CommonDataKinds.Phone.CONTENT_URI, // URI
                        projectionFields, // projection fields
                        whereClause, // the selection criteria
                        null, // the selection args
                        sortOrder // the sort order
                );
                // Return the loader for use
                return cursorLoader;


        }
        return  null;
    }

    @Override
    public void onLoaderReset(Loader<Cursor> loader) {
        switch (loader.getId())
        {
            case LOADER_SEARCH_RESULTS:
                adapter.swapCursor(null);
                break;

        }

    }

    @Override
    public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
        switch (loader.getId())
        {
            case LOADER_SEARCH_RESULTS:

                MatrixCursor newCursor = new MatrixCursor(projectionFields); // Same projection used in loader
                if ( cursor!=null && cursor.moveToFirst()) {
                    String lastName = "";
                    do {
                        if (cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME)).compareToIgnoreCase(lastName) != 0) {

                            newCursor.addRow(new Object[]{cursor.getString(0), cursor.getString(1), cursor.getString(2),cursor.getString(3),cursor.getString(4),cursor.getString(5)}); // match the original cursor fields
                            lastName =cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
                        }
                    } while (cursor.moveToNext());
                }

                if(newCursor!=null) {
                    adapter = new ContactAdapter(this, newCursor);
                    adapter.swapCursor(newCursor);
                    recyclerView.setAdapter(adapter);
                }
                break;
        }
    }


    }