Morning quotes offers a wonderful start to the day with a plethora of fresh morning quotes and beautiful wallpapers. Users can browse through a variety of uplifting quotes and stunning images, making their mornings brighter and more inspiring. Additionally, the app provides a feature where users can jot down their personal thoughts and save them as notes, ensuring they can capture their reflections and ideas at any time.

SHOWING IMAGES IN VIEW PAGER

Screen slides are transitions between one entire screen to another and are common with UIs like setup wizards or slideshows. This lesson shows you how to do screen slides with a ViewPager provided by the support library. ViewPagers can animate screen slides automatically. Here's what a screen slide looks like that transitions from one screen of content to the next:

In this tutorial I am showing a list of images in a custom pager adapter.For full code we can comment below.I am sharing the main activity code with comments for helping you out at each step.

Below is the code snippet for your main activity .

	package com.roy.airteldemo;
	import android.content.Context;
	import android.os.Bundle;
	import android.os.Handler;
	import android.os.Looper;
	import android.os.PersistableBundle;
	import android.support.design.widget.FloatingActionButton;
	import android.support.design.widget.Snackbar;
	import android.support.v4.view.PagerAdapter;
	import android.support.v4.view.ViewPager;
	import android.support.v7.app.AppCompatActivity;
	import android.support.v7.widget.Toolbar;
	import android.util.Log;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.Menu;
	import android.view.MenuItem;
	import android.view.ViewGroup;
	import android.widget.Button;
	import android.widget.ImageView;
	import android.widget.LinearLayout;
	import android.widget.RelativeLayout;
	import android.widget.TextView;
	import android.widget.Toast;
	import com.roy.http.HTTPResponseListener;
	import com.roy.http.HttpGet;
	import com.roy.utils.AsyncThreadPool;
	import com.roy.utils.ImageLoader;
	import com.roy.utils.Util;
	import com.roy.vo.ImageVO;
	import org.json.JSONArray;
	import org.json.JSONException;
	import org.json.JSONObject;
	import java.util.ArrayList;
	import butterknife.Bind;
	import butterknife.ButterKnife;
	public class MainActivity extends AppCompatActivity implements HTTPResponseListener {
	@Bind(R.id.pager)
	ViewPager mViewPager;
	@Bind(R.id.progress_bar)
	RelativeLayout mBar;
	@Bind(R.id.back_button)
	Button btnBack;
	@Bind(R.id.foward_button)
	Button btnForward;
	@Bind(R.id.text_number)
	TextView tvCount;
	private CustomPagerAdapter mCustomPagerAdapter;
	public Handler mUIHandler;
	private AsyncThreadPool mThreadPool;
	private ArrayList<ImageVO> mImageList = new ArrayList<ImageVO>();
	ImageLoader loader;
	@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);
	mUIHandler = new Handler(Looper.getMainLooper());
	AsyncThreadPool.init(mUIHandler);
	mThreadPool = AsyncThreadPool.get();
	fetchImages(); //fetching images -used asynctask for background processing
	// button for swiping left and right views
	btnBack.setOnClickListener(new View.OnClickListener() {
	@Override
	public void onClick(View v) {
	if (mViewPager.getCurrentItem() >= 0) {
	mViewPager.setCurrentItem(getItem(-1), true);
	}
	}
	});
	btnForward.setOnClickListener(new View.OnClickListener() {
	@Override
	public void onClick(View v) {
	if (mViewPager.getCurrentItem() <= mImageList.size() - 1) {
	mViewPager.setCurrentItem(getItem(+1), true);
	}
	}
	});
	mViewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
	public void onPageScrollStateChanged(int state) {
	}
	public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
	}
	public void onPageSelected(int position) {
	int count = position + 1;
	tvCount.setText(count + " " + "of" + " " + mImageList.size());
	}
	});
	}
	class CustomPagerAdapter extends PagerAdapter { //custom adpter for showing images
	Context mContext;
	LayoutInflater mLayoutInflater;
	public CustomPagerAdapter(Context context, ArrayList<ImageVO> mList) {
	mContext = context;
	mImageList = mList;
	loader = new ImageLoader(mContext);
	mLayoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
	}
	@Override
	public int getCount() {
	return mImageList.size();
	}
	@Override
	public boolean isViewFromObject(View view, Object object) {
	return view == ((LinearLayout) object);
	}
	@Override
	public Object instantiateItem(ViewGroup container, final int position) {
	View itemView = mLayoutInflater.inflate(R.layout.pager_item, container, false);
	ImageView imageView = (ImageView) itemView.findViewById(R.id.imageView);
	try {
	JSONObject obj = (mImageList.get(position).getMedia());
	String url = obj.getString("m");
	loader.DisplayImage(url, imageView);
	} catch (Exception e) {
	Log.e("log exception", "" + e.getMessage());
	}
	container.addView(itemView);
	return itemView;
	}
	@Override
	public void destroyItem(ViewGroup container, int position, Object object) {
	container.removeView((LinearLayout) object);
	}
	}
	private void fetchImages() {
	if (Util.haveNetworkConnection(this)) {
	mBar.setVisibility(View.VISIBLE);
	String url = "http://api.flickr.com/services/feeds/photos_public.gne?format=json";
	HttpGet getAllLogs = new HttpGet(this, url);
	getAllLogs.run(url);
	} else {
	Toast.makeText(this, "No network connectivity", Toast.LENGTH_SHORT)
	.show();
	}
	}
	@Override
	public Boolean setGetStatus(JSONObject finalResult, String getUrl, int responseCode) { //make an interface for updating ui on post execute
	mBar.setVisibility(View.GONE);
	if (finalResult != null) {
	try {
	if (finalResult.has("items")) {
	JSONArray jsonArray = finalResult.getJSONArray("items");
	for (int i = 0; i < jsonArray.length(); i++) {
	JSONObject jsonObject = jsonArray.getJSONObject(i);
	ImageVO appObj = new ImageVO(jsonObject);
	mImageList.add(appObj);
	}
	if (mImageList != null && !mImageList.isEmpty()) {
	mCustomPagerAdapter = new CustomPagerAdapter(this, mImageList);
	mViewPager.setAdapter(mCustomPagerAdapter);
	int count = mViewPager.getCurrentItem() + 1;
	tvCount.setText(count + " " + "of" + " " + mImageList.size());
	Log.e("logtag", "" + mImageList.size());
	}
	}
	} catch (JSONException e) {
	}
	}
	return false;
	}
	private int getItem(int i) {
	return mViewPager.getCurrentItem() + i;
	}
	}

view raw gistfile1.txt hosted with ❤ by GitHub

List of contacts through cursor loader framework

Loaders work on a separate thread so your app carries on working while the Loader gets the data. Loaders monitor the data source for any changes and updates the data it gives you. Loaders take care of restoring the cursor after a configuration change without having to do a re-query

Here is the code snippet for the same.You can download the source code from github

	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;
	}
	}
	}

view raw gistfile1.txt hosted with ❤ by GitHub

How to get list of installed apps in android?

In this tutorial we will learn how to show list of installed application in your android phone.

Here is the code snippet for the same.You can download the source code from github

	package com.roy.installedapps;
	import android.app.ActivityManager;
	import android.content.Context;
	import android.content.pm.ApplicationInfo;
	import android.content.pm.PackageManager;
	import android.graphics.drawable.Drawable;
	import android.os.Bundle;
	import android.support.design.widget.FloatingActionButton;
	import android.support.design.widget.Snackbar;
	import android.support.v7.app.AppCompatActivity;
	import android.support.v7.widget.LinearLayoutManager;
	import android.support.v7.widget.RecyclerView;
	import android.support.v7.widget.Toolbar;
	import android.util.Log;
	import android.view.View;
	import android.view.Menu;
	import android.view.MenuItem;
	import android.widget.LinearLayout;
	import org.json.JSONException;
	import java.util.ArrayList;
	import java.util.List;
	import butterknife.Bind;
	import butterknife.ButterKnife;
	public class MainActivity extends AppCompatActivity {
	@Bind(R.id.recycler_view)
	RecyclerView recyclerView;
	private ArrayList<AppModel> mList=new ArrayList<>();
	@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();
	}
	});
	LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
	recyclerView.setLayoutManager(linearLayoutManager);
	recyclerView.setNestedScrollingEnabled(false);
	recyclerView.setHasFixedSize(false);
	getApplicationIstalled();
	ApplIstAdapter adapter = new ApplIstAdapter(this,mList);
	recyclerView.setAdapter(adapter);
	}
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
	// Inflate the menu; this adds items to the action bar if it is present.
	getMenuInflater().inflate(R.menu.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);
	}
	public void getApplicationIstalled() {
	final PackageManager pm = getPackageManager();
	List<ApplicationInfo> packages = pm.getInstalledApplications(PackageManager.GET_META_DATA);
	for (ApplicationInfo packageInfo : packages) {
	ApplicationInfo app = null;
	try {
	if ( (packageInfo.flags & ApplicationInfo.FLAG_SYSTEM) == 0) {
	AppModel model = new AppModel();
	try {
	Drawable icon = getPackageManager().getApplicationIcon(packageInfo.processName);
	model.setDrawable(icon);
	} catch (Exception e) {
	}
	String AppName =packageInfo.loadLabel(getPackageManager()).toString();
	model.setPackageName(packageInfo.packageName);
	model.setAppName(AppName);
	mList.add(model);
	}
	} catch (Exception e) {
	// TODO Auto-generated catch block
	e.printStackTrace();
	}
	}}
	}

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