Friday, 14 December 2018

React Native- Invariant Violation: The navigation prop is missing for this navigator | react-navigation 3- navigation prop is missing for this navigator.

Hello Friend,
       Recently I faced few issue while implementing the react-navigation in my app.
I spent lots of time in it and then finally I found the actual cause of it.

1. undefined is not an object (evaluating 'RNGestureHandlerModule.State')



Then I follow following steps to resolve this,

  1. remove node_modules and package-lock.json
  2. npm install
  3. npm install --save react-navigation
  4. npm install --save react-native-gesture-handler
  5. react-native link
After following this I face another issue i:e,


2. Invariant Violation: The navigation prop is missing for this navigator. In 
react-navigation 3 you must set up your app container directly. More info: 
https://reactnavigation.org/docs/en/app-containers.html
              



Note  This is an react-navigation 3.0 bug. You can go through the below link for more details. 

- React Navigation 3.0 has a number of breaking changes including an explicit app container required for the root navigator.

In the past, any navigator could act as the navigation container at the top-level of your app because they were all wrapped in “navigation containers”. The navigation container, now known as an app container, is a higher-order-component that maintains the navigation state of your app and handles interacting with the outside world to turn linking events into navigation actions and so on.

In v2 and earlier, the containers in React Navigation are automatically provided by the create Navigator functions. As of v3, you are required to use the container directly. In v3 we also renamed createNavigationContainer to createAppContainer.


Below are the complete code,

/**
 * This is an example code for Navigator
 */
import React, { Component } from 'react';
import {createStackNavigator,createAppContainer} from 'react-navigation';
 
import FirstPage from './src/component/FirstPage';
import SecondPage from './src/component/SecondPage';
//import all the screens we are going to switch 
 
const RootStack = createStackNavigator({
    //Constant which holds all the screens like index of any book 
    FirstPage: { screen: FirstPage }, 
    //First entry by default be our first screen if we do not define initialRouteName
    SecondPage: { screen: SecondPage }, 
  },
  {
    initialRouteName: 'FirstPage',
  }
);
const App = createAppContainer(RootStack);


Download complet code from here
Hope this will helps someone........

Enjoy coding..... :)


Wednesday, 5 December 2018

Kotlin-Create TextView Programatically

Hello Friends,
      In this tutorial I am going create a textview dynamically in kotlin and add it to Linearlayout layout.

1. activity_main.xml: Following is the activity_main.xml containing the TextView with the text .

<?xml version="1.0" encoding="utf-8"?>  
 <android.support.constraint.ConstraintLayout xmlns:android="https://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"  
  tools:context=".TextViewSample">  
  <LinearLayout  
   android:id="@+id/ll_main_layout"  
   android:layout_width="match_parent"  
   android:layout_height="wrap_content"  
   android:orientation="vertical">  
   <TextView  
    android:id="@+id/tv_static"  
    android:layout_width="wrap_content"  
    android:layout_height="wrap_content"  
    android:textSize="20sp"  
    android:padding="20sp"  
    android:justificationMode="inter_word"  
    android:text="This textview is created from xml"/>  
  </LinearLayout>  
 </android.support.constraint.ConstraintLayout>

2. Creation of textview dynamically,
val tv_programtically = TextView(this)
tv_programtically.textSize = 20f
tv_programtically.text = "This textview is an dynamic textview in kotlin"

3. Finally the complete code is:

  TextViewSample.kt
package com.android.developer.kotlinsample

import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.widget.LinearLayout
import android.widget.TextView
class TextViewSample : AppCompatActivity() {

  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_text_view_sample)

    /** Dynamic creation of text view */
    val tv_programtically = TextView(this)
    tv_programtically.textSize = 20f
    tv_programtically.text = "This textview is an dynamic textview in kotlin"
    /**------end--------**/

    // add TextView to LinearLayout
    val ll_main_layout = findViewById(R.id.ll_main_layout) as LinearLayout
    ll_main_layout.addView(tv_programtically)
  }
}
Hope this will help some one. Enjoy Coding.... :)

Kotlin-bind OnClickListener on view

Hello Friends,
 In this tutorial I am showing you how to bind the click listener on View in Kotlin.

1. Code snippet to set OnClickListener on Textview in Kotlin Android
val tvStatic = findViewById(R.id.tv_static) as TextView
tvStatic.setOnClickListener {
 // your code to perform when the user clicks on the TextView
 Toast.makeText(this, "You clicked on TextView 'Click Me'.", Toast.LENGTH_SHORT).show()
}

2. Code snippet to set OnClickListener on Button in Kotlin Android
// get reference to button
val btn_click = findViewById(R.id.btn_click_me) as Button
// set on-click listener
btn_click.setOnClickListener {
    Toast.makeText(this@MainActivity, "You clicked on Button.", Toast.LENGTH_SHORT).show()
}

3. Code snippet to set OnClickListener on ImageView in Kotlin Android
// get reference to ImageView
val iv_profile = findViewById(R.id.image_view) as ImageView
// set on-click listener for ImageView
iv_profile.setOnClickListener {
    // your code here
}

Hope this will help someone.
Enjoy Coding..... :)

Saturday, 23 June 2018

Android Live Data Tutorial | Live Data | Data Binding | Architecture Components

Hello Friends,
              Today I am going to share me small tutorial of LiveData with Data Binding.

-What is LiveData?
     LiveData is an observable data holder class that can be observed within
     a given lifecycle. It lets the components in your app, usually the UI,
     observe LiveData objects for changes.

-The advantages of using LiveData

  •      Ensures your UI matches your data state
  •      No memory leaks
  •      No crashes due to stopped activities
  •      No more manual lifecycle handling
  •      Always up to date data
  •      Proper configuration changes
  •      Sharing resources
-How to use it in our app

   a. Add below dependency in app/build.gradle

implementation "android.arch.lifecycle:extensions:1.1.1" 


   
   b. UserViewModel.java : Creating a ViewModel class

package com.android.developer.livedatademo.model;

import android.arch.lifecycle.MutableLiveData;
import android.arch.lifecycle.ViewModel;

/**
 * Created by mukesh on 13/6/18.
 */
public class UserViewModel extends ViewModel {

    // Create a LiveData with a String
    private MutableLiveData mUser;

    public MutableLiveData getUser() {
        if (mUser == null) {
            mUser = new MutableLiveData();
        }
        return mUser;
    }
} 

In Activity class we creates an observer which updates the ui.
final Observer nameObserver = new Observer() {
      @Override
      public void onChanged(@Nullable final User user) {
      // Update the UI, in this case, a TextView.
      binding.tvUserName.setText(user.getName());
    }
};

Next step is observe the livedata, passing in the activity as a LifecycleOwner and the Observer.
userViewModel.getUser().observe(this, nameObserver);
binding.btnClick.setOnClickListener(this); 

The complete code,

package com.android.developer.livedatademo;

import android.arch.lifecycle.Observer;
import android.arch.lifecycle.ViewModelProviders;
import android.databinding.DataBindingUtil;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;

import com.android.developer.livedatademo.databinding.ActivityMainBinding;
import com.android.developer.livedatademo.model.User;
import com.android.developer.livedatademo.model.UserViewModel;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    UserViewModel userViewModel;
    ActivityMainBinding binding;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
        // Get the ViewModel.
        userViewModel = ViewModelProviders.of(this).get(UserViewModel.class);
        // Create the observer which updates the UI.
        final Observer nameObserver = new Observer() {
            @Override
            public void onChanged(@Nullable final User user) {
                // Update the UI, in this case, a TextView.
                binding.tvUserName.setText(user.getName());
            }
        };

        // Observe the LiveData, passing in this activity as the LifecycleOwner and the observer.
        userViewModel.getUser().observe(this, nameObserver);
        binding.btnClick.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        User user = new User();
        user.setName("Mukesh Yadav");
        user.setAge("25");
        userViewModel.getUser().setValue(user);
    }
} 

Download the complete code here

Hope this will helps someone.
Enjoy Coding... :)

Sunday, 17 December 2017

Android MVP for Beginners | Android MVP tutorial | Model-View-Presenter: Android | Android Architecture with MVP

Hello Friends,
          Today I am  going to share a very simple example of Android MVP.
In this sample I am using MVP pattern for network call and and user
form(login form) data validation which is mainly used in most of the android
application.

Model View Presenter divides application into three layers i.e: Model, View and Presenter.
  1. Model: This handles the data part of our application
  2. Presenter: It acts as a bridge that connects a Model and a View.
  3. View: This is responsible for laying out views with the relevant data as instructed by the Presenter     

Note: The View never communicates with Model directly

1. LoginActivity.java 
package android.developer.solutions.androidmvp.activity.login.view;

import android.content.Intent;
import android.developer.solutions.androidmvp.R;
import android.developer.solutions.androidmvp.activity.home.view.HomeActivity;
import android.developer.solutions.androidmvp.activity.login.interactor.LoginInteractorImpl;
import android.developer.solutions.androidmvp.activity.login.presenter.ILoginPresenter;
import android.developer.solutions.androidmvp.activity.login.presenter.LoginPresenterImpl;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;

public class LoginActivity extends AppCompatActivity implements ILoginView {
    EditText username;
    EditText password;
    ProgressBar progress;
    Button button;
    private ILoginPresenter presenter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        progress = (ProgressBar) findViewById(R.id.progress);
        button = (Button) findViewById(R.id.btnLogin);
        password = (EditText) findViewById(R.id.password);
        username = (EditText) findViewById(R.id.username);
        presenter = new LoginPresenterImpl(this, new LoginInteractorImpl());
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                presenter.validateCredentials(username.getText().toString(), password.getText().toString());
            }
        });
    }

    @Override
    protected void onDestroy() {
        presenter.onDestroy();
        super.onDestroy();
    }

    @Override
    public void showProgress() {
        progress.setVisibility(View.VISIBLE);
    }

    @Override
    public void hideProgress() {
        progress.setVisibility(View.GONE);
    }

    @Override
    public void setUsernameError() {
        username.setError("Invalid user name");
    }

    @Override
    public void setPasswordError() {
        password.setError("Invalid password");
    }

    @Override
    public void navigateToHome() {
        startActivity(new Intent(this, HomeActivity.class));
        finish();
    }
}


2. ILoginView.java

package android.developer.solutions.androidmvp.activity.login.view;

/**
 * Created by Mukesh on 12/16/2017.
 * androiddevelopersolutions.com
 */
public interface ILoginView {
    void showProgress();
    void hideProgress();
    void setUsernameError();
    void setPasswordError();
    void navigateToHome();
}


Download complete code from here

Hope this will helps some one.
Enjoy Coding............ :)

Monday, 27 November 2017

Android O: Fonts – Part 1 | Working with custom font Android O | Custom font | Fonts in XML

Hello Friends,
              Android 8.0 (API level 26) introduces a new feature, Fonts in XML, which lets you use fonts as resources. You can add the font file in the res/font/ folder to bundle fonts as resources. These fonts are compiled in your R file and are automatically available in Android Studio. You can access the font resources with the help of a new resource type, font. For example, to access a font resource, use @font/myfont, or R.font.myfont.

To use the Fonts in XML feature on devices running Android API version 14 and higher, use the Support Library 26. For more information on using the support library, refer to the Using the support library section.

Steps

  • To add fonts as resources, perform the following steps in the Android Studio

    • Right-click the res folder and go to New > Android resource directory       
    • The New Resource Directory window appears.


    • In the Resource type list, select font, and then click OK.






      Note: The name of the resource directory must be font.

  • Using fonts in XML layouts 
    • In the layout XML file, set the font Family attribute to the font file you want to access.






    Download Complete code from here.
    Hope this will help some one.
    Enjoy coding..................  ;)   

Thursday, 23 November 2017

Android Firebase | Android Push Notifications using Firebase Cloud Messaging FCM

Hello Friends,
               Google moved from Google Cloud Messaging (GCM) to Firebase Cloud Messaging (FCM). Just like GCM, FCM is a cross-platform messaging solution that allows you to send messages. FCM is completely free and there are no limitations.

  • Firebase Message types : Using FCM you can send three types of messages i.e:
    • Notification Message
    • Data Message
    • both Notification & Data Payload


  • Integrating Firebase Cloud Messaging 
    • First thing you need to do is go to https://firebase.google.com/ and make an account to gain access to their console. After you gain access to the console you can start by creating your first project.
    • Give the package name of your project in which you are going to integrate the Firebase. Here the google-services.json file will be downloaded when you press add app button.


     



1. MainActivity.java
package android.developer.solutions.firebasenotification.activity;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.developer.solutions.firebasenotification.R;
import android.developer.solutions.firebasenotification.app.Config;
import android.developer.solutions.firebasenotification.util.NotificationUtils;
import android.os.Bundle;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;

import com.google.firebase.messaging.FirebaseMessaging;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = MainActivity.class.getSimpleName();
    private BroadcastReceiver mRegistrationBroadcastReceiver;
    private TextView txtRegId, txtMessage;

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

        txtRegId = (TextView) findViewById(R.id.txt_reg_id);
        txtMessage = (TextView) findViewById(R.id.txt_push_message);

        mRegistrationBroadcastReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {

                // checking for type intent filter
                if (intent.getAction().equals(Config.REGISTRATION_COMPLETE)) {
                    // gcm successfully registered
                    // now subscribe to global` topic to receive app wide notifications
                    FirebaseMessaging.getInstance().subscribeToTopic(Config.TOPIC_GLOBAL);

                    displayFirebaseRegId();

                } else if (intent.getAction().equals(Config.PUSH_NOTIFICATION)) {
                    // new push notification is received

                    String message = intent.getStringExtra("message");
                    Toast.makeText(getApplicationContext(), "Push notification: " + message, Toast.LENGTH_LONG).show();
                    txtMessage.setText(message);
                }
            }
        };

        displayFirebaseRegId();
    }

    // Fetches reg id from shared preferences
    // and displays on the screen
    private void displayFirebaseRegId() {
        SharedPreferences pref = getApplicationContext().getSharedPreferences(Config.SHARED_PREF, 0);
        String regId = pref.getString("regId", null);

        Log.e(TAG, "Firebase reg id: " + regId);

        if (!TextUtils.isEmpty(regId))
            txtRegId.setText("Firebase Reg Id: " + regId);
        else
            txtRegId.setText("Firebase Reg Id is not received yet!");
    }

    @Override
    protected void onResume() {
        super.onResume();

        // register GCM registration complete receiver
//        LocalBroadcastManager.getInstance(this).registerReceiver(mRegistrationBroadcastReceiver,
//                new IntentFilter(Config.REGISTRATION_COMPLETE));

        // register new push message receiver
        // by doing this, the activity will be notified each time a new message arrives
        LocalBroadcastManager.getInstance(this).registerReceiver(mRegistrationBroadcastReceiver,
                new IntentFilter(Config.PUSH_NOTIFICATION));

        // clear the notification area when the app is opened
        NotificationUtils.clearNotifications(getApplicationContext());
    }

    @Override
    protected void onPause() {
        LocalBroadcastManager.getInstance(this).unregisterReceiver(mRegistrationBroadcastReceiver);
        super.onPause();
    }
}




2. MyFirebaseInstanceIDService.java

package android.developer.solutions.firebasenotification.service;

import android.content.Intent;
import android.content.SharedPreferences;
import android.developer.solutions.firebasenotification.app.Config;
import android.support.v4.content.LocalBroadcastManager;
import android.util.Log;

import com.google.firebase.iid.FirebaseInstanceId;
import com.google.firebase.iid.FirebaseInstanceIdService;


/**
 * Created by Mukesh on 10/02/17.
 * www.androiddevelopersolutions.com/
 */
public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService {
    private static final String TAG = MyFirebaseInstanceIDService.class.getSimpleName();

    @Override
    public void onTokenRefresh() {
        super.onTokenRefresh();
        String refreshedToken = FirebaseInstanceId.getInstance().getToken();

        // Saving reg id to shared preferences
        storeRegIdInPref(refreshedToken);

        // sending reg id to your server
        sendRegistrationToServer(refreshedToken);

        // Notify UI that registration has completed, so the progress indicator can be hidden.
        Intent registrationComplete = new Intent(Config.REGISTRATION_COMPLETE);
        registrationComplete.putExtra("token", refreshedToken);
        LocalBroadcastManager.getInstance(this).sendBroadcast(registrationComplete);
    }

    private void sendRegistrationToServer(final String token) {
        // sending gcm token to server
        Log.e(TAG, "sendRegistrationToServer: " + token);
    }

    private void storeRegIdInPref(String token) {
        SharedPreferences pref = getApplicationContext().getSharedPreferences(Config.SHARED_PREF, 0);
        SharedPreferences.Editor editor = pref.edit();
        editor.putString("regId", token);
        editor.commit();
    }
}


3. MyFirebaseMessagingService.java
package android.developer.solutions.firebasenotification.service;

import android.content.Context;
import android.content.Intent;
import android.developer.solutions.firebasenotification.activity.MainActivity;
import android.developer.solutions.firebasenotification.app.Config;
import android.developer.solutions.firebasenotification.util.NotificationUtils;
import android.support.v4.content.LocalBroadcastManager;
import android.text.TextUtils;
import android.util.Log;

import com.google.firebase.messaging.FirebaseMessagingService;
import com.google.firebase.messaging.RemoteMessage;

import org.json.JSONException;
import org.json.JSONObject;


/**
 * Created by Mukesh on 10/02/17.
 * www.androiddevelopersolutions.com/
 */
public class MyFirebaseMessagingService extends FirebaseMessagingService {

    private static final String TAG = MyFirebaseMessagingService.class.getSimpleName();

    private NotificationUtils notificationUtils;

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        Log.e(TAG, "From: " + remoteMessage.getFrom());

        if (remoteMessage == null)
            return;

        // Check if message contains a notification payload.
        if (remoteMessage.getNotification() != null) {
            Log.e(TAG, "Notification Body: " + remoteMessage.getNotification().getBody());
            handleNotification(remoteMessage.getNotification().getBody());
        }

        // Check if message contains a data payload.
        if (remoteMessage.getData().size() > 0) {
            Log.e(TAG, "Data Payload: " + remoteMessage.getData().toString());

            try {
                JSONObject json = new JSONObject(remoteMessage.getData().toString());
                handleDataMessage(json);
            } catch (Exception e) {
                Log.e(TAG, "Exception: " + e.getMessage());
            }
        }
    }

    private void handleNotification(String message) {
        if (!NotificationUtils.isAppIsInBackground(getApplicationContext())) {
            // app is in foreground, broadcast the push message
            Intent pushNotification = new Intent(Config.PUSH_NOTIFICATION);
            pushNotification.putExtra("message", message);
            LocalBroadcastManager.getInstance(this).sendBroadcast(pushNotification);

            // play notification sound
            NotificationUtils notificationUtils = new NotificationUtils(getApplicationContext());
            notificationUtils.playNotificationSound();
        } else {
            // If the app is in background, firebase itself handles the notification
        }
    }

    private void handleDataMessage(JSONObject json) {
        Log.e(TAG, "push json: " + json.toString());

        try {
            JSONObject data = json.getJSONObject("data");

            String title = data.getString("title");
            String message = data.getString("message");
            boolean isBackground = data.getBoolean("is_background");
            String imageUrl = data.getString("image");
            String timestamp = data.getString("timestamp");
            JSONObject payload = data.getJSONObject("payload");

            Log.e(TAG, "title: " + title);
            Log.e(TAG, "message: " + message);
            Log.e(TAG, "isBackground: " + isBackground);
            Log.e(TAG, "payload: " + payload.toString());
            Log.e(TAG, "imageUrl: " + imageUrl);
            Log.e(TAG, "timestamp: " + timestamp);


            if (!NotificationUtils.isAppIsInBackground(getApplicationContext())) {
                // app is in foreground, broadcast the push message
                Intent pushNotification = new Intent(Config.PUSH_NOTIFICATION);
                pushNotification.putExtra("message", message);
                LocalBroadcastManager.getInstance(this).sendBroadcast(pushNotification);

                // play notification sound
                NotificationUtils notificationUtils = new NotificationUtils(getApplicationContext());
                notificationUtils.playNotificationSound();
            } else {
                // app is in background, show the notification in notification tray
                Intent resultIntent = new Intent(getApplicationContext(), MainActivity.class);
                resultIntent.putExtra("message", message);

                // check for image attachment
                if (TextUtils.isEmpty(imageUrl)) {
                    showNotificationMessage(getApplicationContext(), title, message, timestamp, resultIntent);
                } else {
                    // image is present, show notification with image
                    showNotificationMessageWithBigImage(getApplicationContext(), title, message, timestamp, resultIntent, imageUrl);
                }
            }
        } catch (JSONException e) {
            Log.e(TAG, "Json Exception: " + e.getMessage());
        } catch (Exception e) {
            Log.e(TAG, "Exception: " + e.getMessage());
        }
    }

    /**
     * Showing notification with text only
     */
    private void showNotificationMessage(Context context, String title, String message, String timeStamp, Intent intent) {
        notificationUtils = new NotificationUtils(context);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        notificationUtils.showNotificationMessage(title, message, timeStamp, intent);
    }

    /**
     * Showing notification with text and image
     */
    private void showNotificationMessageWithBigImage(Context context, String title, String message, String timeStamp, Intent intent, String imageUrl) {
        notificationUtils = new NotificationUtils(context);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        notificationUtils.showNotificationMessage(title, message, timeStamp, intent, imageUrl);
    }
}



4. AndroidManifest.xml



    
        
            
                

                
            
        

        
        
            
                
            
        

        
            
                
            
        
        
    




Download code from here

Hope you like this...
Enjoy Coding..... :)

Tuesday, 19 September 2017

RecyclerView with multiple View Type | RecyclerView with different view types | View Pager inside RecyclerView

Hello Friends,
              Today I am going to share my another android tutorial, with the help
of this we can easily create a Recyclerview with multiple different types
of view .
Also this tutorial helps you to create a View pager inside RecyclerView,


























1. MainActivity.java :

package com.developer.solutions.recyclerviewwithmultipleviewtype.activity;

import android.app.Activity;
import android.content.Intent;
import android.os.Binder;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutCompat;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.OrientationHelper;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.widget.TextView;

import com.developer.solutions.recyclerviewwithmultipleviewtype.R;
import com.developer.solutions.recyclerviewwithmultipleviewtype.adapter.MultiViewTypeAdapter;
import com.developer.solutions.recyclerviewwithmultipleviewtype.model.Data;

import java.util.ArrayList;

import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.Unbinder;

/**
 * Created by Mukesh on 3/8/17.
 * himky02@gmail.com
 */
public class MainActivity extends AppCompatActivity {

    Activity mActivity;
    @BindView(R.id.toolbar)
    Toolbar toolbar;
    @BindView(R.id.rv)
    RecyclerView mRecyclerView;
    Unbinder mUnbinder;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //((TextView) findViewById(R.id.tv)).setText("Welcome user");
        mUnbinder = ButterKnife.bind(this);

        ArrayList list = new ArrayList<>();
        list.add(new Data(Data.VIEW_PAGER, "Hello. This is the View Pager view type with images", 0));
        list.add(new Data(Data.IMAGE_TYPE, "A view type with Image and Textview", R.drawable.disneys_cinderella));
        list.add(new Data(Data.AUDIO_TYPE, "Hey, A view type with Button and Textview", 0));
        list.add(new Data(Data.IMAGE_TYPE, "Hi again. A view with Image and Textview", R.drawable.snow));

        MultiViewTypeAdapter adapter = new MultiViewTypeAdapter(list, this);
        final LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
        linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
        mRecyclerView.setLayoutManager(linearLayoutManager);
        mRecyclerView.setItemAnimator(new DefaultItemAnimator());
        mRecyclerView.setAdapter(adapter);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
         if (mUnbinder != null) mUnbinder.unbind();
    }
}


2.MultiViewTypeAdapter.java
package com.developer.solutions.recyclerviewwithmultipleviewtype.adapter;

import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Handler;
import android.support.v4.view.ViewPager;
import android.support.v7.widget.RecyclerView;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import com.developer.solutions.recyclerviewwithmultipleviewtype.R;
import com.developer.solutions.recyclerviewwithmultipleviewtype.model.Data;

import java.util.ArrayList;

import butterknife.BindView;
import butterknife.ButterKnife;

/**
 * Created by Mukesh on 3/8/17.
 * himky02@gmail.com
 */
public class MultiViewTypeAdapter extends RecyclerView.Adapter {
    private ArrayList dataSet;
    Context mContext;
    int total_types;
    ArrayList slider_image_list;
    int page = 0;

    public static class TextTypeViewHolder extends RecyclerView.ViewHolder {
        @BindView(R.id.ll_dots)
        LinearLayout ll_dots;
        @BindView(R.id.vp_slider)
        ViewPager mvViewPager;

        public TextTypeViewHolder(View itemView) {
            super(itemView);
            ButterKnife.bind(this, itemView);
        }
    }

    public static class ImageTypeViewHolder extends RecyclerView.ViewHolder {
        @BindView(R.id.type)
        TextView tvtype;
        @BindView(R.id.img)
        ImageView iv;

        public ImageTypeViewHolder(View itemView) {
            super(itemView);
            ButterKnife.bind(this, itemView);
        }
    }

    public static class ButtonTypeViewHolder extends RecyclerView.ViewHolder {
        @BindView(R.id.type)
        TextView type;
        @BindView(R.id.btn)
        Button btn;

        public ButtonTypeViewHolder(View itemView) {
            super(itemView);
            ButterKnife.bind(this, itemView);
        }
    }

    public MultiViewTypeAdapter(ArrayList data, Context context) {
        this.dataSet = data;
        this.mContext = context;
        total_types = dataSet.size();
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        View view;
        switch (viewType) {
            case Data.VIEW_PAGER:
                view = LayoutInflater.from(parent.getContext()).inflate(R.layout.viewpager, parent, false);
                return new TextTypeViewHolder(view);
            case Data.IMAGE_TYPE:
                view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_image_type, parent, false);
                return new ImageTypeViewHolder(view);
            case Data.AUDIO_TYPE:
                view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_button_type, parent, false);
                return new ButtonTypeViewHolder(view);
        }
        return null;


    }


    @Override
    public int getItemViewType(int position) {

        switch (dataSet.get(position).type) {
            case 0:
                return Data.VIEW_PAGER;
            case 1:
                return Data.IMAGE_TYPE;
            case 2:
                return Data.AUDIO_TYPE;
            default:
                return -1;
        }
    }

    @Override
    public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int listPosition) {

        Data object = dataSet.get(listPosition);
        if (object != null) {
            switch (object.type) {
                case Data.VIEW_PAGER:
                    //((TextTypeViewHolder) holder).type.setText(object.text);
                    slider_image_list = new ArrayList<>();

                    //Add few items to slider_image_list ,this should contain url of images which should be displayed in slider
                    // here i am adding few sample image links, you can add your own

                    slider_image_list.add("http://cdn.collider.com/wp-content/uploads/avengers-movie-banner-scarlett-johansson-jeremy-renner.jpg");
                    slider_image_list.add("http://www.officialterridwyer.com/wp-content/uploads/2015/04/Disneys-Cinderella-2015-Movie-Banner.jpg");
                    slider_image_list.add("http://igmedia.blob.core.windows.net/igmedia/hindi/gallery/movies/raabta/main1.jpg");
                    slider_image_list.add("http://fantoosy.com/wp-content/uploads/2015/11/tamasha.jpg");
                    final SliderPagerAdapter sliderPagerAdapter = new SliderPagerAdapter((Activity) mContext, slider_image_list);
                    ((TextTypeViewHolder) holder).mvViewPager.setAdapter(sliderPagerAdapter);

                    ((TextTypeViewHolder) holder).mvViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
                        @Override
                        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

                        }

                        @Override
                        public void onPageSelected(int position) {
                            addBottomDots(position, ((TextTypeViewHolder) holder).ll_dots);
                            page = position;
                        }

                        @Override
                        public void onPageScrollStateChanged(int state) {

                        }
                    });
                    addBottomDots(0, ((TextTypeViewHolder) holder).ll_dots);
                    final Handler h = new Handler();
                    h.postDelayed(new Runnable() {
                        @Override
                        public void run() {
                            if (sliderPagerAdapter.getCount() == page) {
                                page = 0;
                            } else {
                                page++;
                            }
                            ((TextTypeViewHolder) holder).mvViewPager.setCurrentItem(page);
                            h.postDelayed(this, 2000);
                        }
                    }, 1000);

                    break;
                case Data.IMAGE_TYPE:
                    ((ImageTypeViewHolder) holder).tvtype.setText(object.text);
                    ((ImageTypeViewHolder) holder).iv.setImageResource(object.data);
                    break;
                case Data.AUDIO_TYPE:
                    ((ButtonTypeViewHolder) holder).type.setText(object.text);
                    ((ButtonTypeViewHolder) holder).btn.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View view) {
                            Toast.makeText(mContext, "You clicked!!!", Toast.LENGTH_SHORT).show();
                        }
                    });
                    break;
            }
        }

    }

    @Override
    public int getItemCount() {
        return dataSet.size();
    }

    //showing dots on screen
    private void addBottomDots(int currentPage, LinearLayout ll_dots) {
        TextView[] dots = new TextView[slider_image_list.size()];
        ll_dots.removeAllViews();
        for (int i = 0; i < dots.length; i++) {
            dots[i] = new TextView(mContext);
            dots[i].setText(Html.fromHtml("•"));
            dots[i].setTextSize(35);
            dots[i].setTextColor(Color.parseColor("#343434"));
            ll_dots.addView(dots[i]);
        }

        if (dots.length > 0)
            dots[currentPage].setTextColor(Color.parseColor("#A2A2A2"));
    }

}
Download the code from here

Hope this will helps some one.
Enjoy Coding....

Saturday, 27 May 2017

Android Retrofit With RX Java Sample | Android Retrofit Example

Hello Friends,

This is an simple example of How we use Android Retrofit With RX .  I hope this
will helps you to start using Retrofit and  RX together.



1. MainActivity.java

package android.com.retrofitwithrxsample;

import android.com.retrofitwithrxsample.adapter.DataAdapter;
import android.com.retrofitwithrxsample.model.Country;
import android.com.retrofitwithrxsample.model.Result;
import android.com.retrofitwithrxsample.network.RequestInterface;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.widget.Toast;

import com.jakewharton.retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory;

import java.util.ArrayList;

import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.disposables.CompositeDisposable;
import io.reactivex.schedulers.Schedulers;
import okhttp3.OkHttpClient;
import okhttp3.logging.HttpLoggingInterceptor;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;
import com.newrelic.agent.android.NewRelic;

/**
 * Create by: Mukesh Yadav
 * www.androiddevelopersolutions.com
 */
public class MainActivity extends AppCompatActivity {

    private static String BASE_URL =  "http://services.groupkt.com/";
    private RecyclerView mRecyclerView;

    private CompositeDisposable mCompositeDisposable;

    private DataAdapter mAdapter;

    private ArrayList mAndroidArrayList;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mCompositeDisposable = new CompositeDisposable();
        initRecyclerView();
        loadJSON();
    }

    private void initRecyclerView() {

        mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
        mRecyclerView.setHasFixedSize(true);
        RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getApplicationContext());
        mRecyclerView.setLayoutManager(layoutManager);
    }

    private void loadJSON() {
        HttpLoggingInterceptor logging = new HttpLoggingInterceptor();
        // set your desired log level
        logging.setLevel(HttpLoggingInterceptor.Level.BODY);

        OkHttpClient.Builder httpClient = new OkHttpClient.Builder();
        // add your other interceptors …
        httpClient.addInterceptor(logging);  
        RequestInterface requestInterface = new Retrofit.Builder()
                .baseUrl(BASE_URL)
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .addConverterFactory(GsonConverterFactory.create())
                .client(httpClient.build())
                .build().create(RequestInterface.class);           
        mCompositeDisposable.add(requestInterface.getAllCountry()
                .observeOn(AndroidSchedulers.mainThread())
                .subscribeOn(Schedulers.io())
                .subscribe(this::handleResponse,this::handleError));   
    }

    private void handleResponse(Country response) {
        if(response != null &&
                response.getRestResponse() != null &&
                response.getRestResponse().getResult() != null &&
                response.getRestResponse().getResult().size() >0) {
            mAndroidArrayList = (ArrayList) response.getRestResponse().getResult();
            mAdapter = new DataAdapter(mAndroidArrayList);
            mRecyclerView.setAdapter(mAdapter);
        }
    }

    private void handleError(Throwable error) {

        Toast.makeText(this, "Error "+error.getLocalizedMessage(), Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        mCompositeDisposable.clear();
    }
}



You can Download the comple code From here: RetrofitWithRxSample

Hope this will helps you.
Enjoy Coding...... :)

Saturday, 22 October 2016

Mobile World : Pixel Phone By Google | Google Pixel

Hello Friends,

Google Pixel smartphone was launched in October 2016 which comes with a 5.00-inch touchscreen display and a resolution of 1080 pixels by 1920 pixels at a PPI of 441 pixels per inch.

The Google Pixel is powered by 1.6GHz quad-core Qualcomm Snapdragon 821 processor and it comes with 4GB of RAM. The phone packs 32GB of internal storage cannot be expanded. As far as the cameras are concerned, the Google Pixel packs a 12.3-megapixel primary camera on the rear and a 8-megapixel front shooter for selfies.

The Google Pixel runs Android 7.1(Nougat) and is powered by a 2770mAh non removable battery. It measures 143.80 x 69.50 x 8.60 (height x width x thickness) and weighs 143.00 grams.

The Google Pixel is a single SIM (GSM) smartphone that accepts a Nano-SIM. Connectivity options include Wi-Fi, GPS, Bluetooth, NFC, 4G (with support for Band 40 used by some LTE networks in India). Sensors on the phone include Proximity sensor, Ambient light sensor, Accelerometer, and Gyroscope.

The Google Pixel smartphones come in three colors with rather descriptive names - Quite Black, Very Silver, and the limited edition Really Blue.





Google Pixel detailed specifications

GENERAL
Release date October 2016
Form factor Touchscreen
Dimensions (mm) 143.80 x 69.50 x 8.60
Weight (g) 143.00
Battery capacity (mAh) 2770
Removable battery No
Colours Very Silver, Quite Black, Really Blue
SAR value NA

DISPLAY
Screen size (inches) 5.00
Touchscreen Yes
Resolution 1080x1920 pixels
Pixels per inch (PPI)  441

HARDWARE
Processor 1.6GHz  quad-core
Processor make Qualcomm Snapdragon 821
RAM 4GB
Internal storage 32GB

CONNECTIVITY
Wi-Fi Yes
Wi-Fi standards supported 802.11 a/ b/ g/ n/ ac
GPS Yes
Bluetooth Yes, v 4.20
NFC Yes
Infrared No
USB OTG No
Headphones 3.5mm
FM No
SIM Type Nano-SIM
GSM/ CDMA GSM
3G Yes
4G/ LTE Yes
Supports 4G in India (Band 40) Yes

SOFTWARE
Operating System  Android 7.1

CAMERA
Rear camera 12.3-megapixel
Flash Yes
Front camera 8-megapixel

SENSOR
Compass/ Magnetometer Yes
Proximity sensor Yes
Accelerometer Yes
Ambient light sensor Yes
Gyroscope Yes
Barometer Yes
Temperature sensor No


Keep In touch for latest mobile world related updates.

Enjoy :)

 

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