Showing posts with label sample code. Show all posts
Showing posts with label sample code. Show all posts

Tuesday, 30 May 2023

A Comprehensive React Native Tutorial: Building an App with User Database, Web API Integration, Charts, and Payment Integration.

React Native has emerged as a powerful framework for building cross-platform mobile applications using JavaScript and React. In this tutorial, we will explore how to create a feature-rich app using React Native that includes user database functionality, web API integration, charts for data visualization, and payment integration. By the end of this tutorial, you'll have a solid understanding of these key aspects and be equipped to develop your own robust mobile apps.

Prerequisites:

Before diving into this tutorial, you should have a basic understanding of JavaScript, React, and React Native. Additionally, familiarity with RESTful APIs and database concepts will be helpful.

Refer the below link for complete sample code:-

Download Sample Code

Let's get started with the step-by-step tutorial:

Step 1: Setting up the React Native Project

To begin, ensure that you have Node.js and npm installed on your machine. Create a new React Native project using the following command:

npx react-native init MyApp

Step 2: User Database
Implementing a user database is essential for many applications. We'll use Firebase, a cloud-based platform, to store and manage user data. Sign up for a Firebase account and create a new project.
Configure Firebase in your React Native app by adding the necessary credentials.
Next, install the Firebase SDK by running the following command within your project directory:

npm install firebase

Step 3: Web API Integration
To interact with web APIs, we'll use the popular fetch function provided by React Native. Create a new file, api.js, and define functions to handle API requests. You can make use of fetch and other JavaScript techniques to fetch data, send POST requests, etc.

Step 4: Data Visualization with Charts
React Native offers several charting libraries, such as Victory Native and React Native Charts Wrapper, that can be used to create visually appealing charts. Install a charting library of your choice and explore its documentation to learn how to create different types of charts, such as line charts, bar charts, or pie charts. Use the fetched data from the API in Step 3 to populate the charts.

Step 5: Payment Integration
To enable payment functionality, we'll integrate a payment gateway into our app. Popular options include Stripe, PayPal, or Braintree. Select a payment gateway of your choice, create an account, and follow their documentation to set up payment integration within your React Native app. Implement features like accepting payments, handling callbacks, and updating user data accordingly.

Step 6: User Interface and Navigation
Design an intuitive and user-friendly interface for your app using React Native's built-in components or third-party libraries like React Navigation. Create navigation flows between screens and ensure seamless user experience.

Step 7: Testing and Deployment
Testing your app thoroughly is crucial before deploying it to production. Utilize testing frameworks like Jest and Enzyme to write unit tests for your components and integration tests for your API calls. Once you're satisfied with the app's functionality and stability, prepare it for deployment. For Android, generate a signed APK, and for iOS, create an archive and submit it to the App Store.




Conclusion:
Congratulations! You have successfully built a feature-rich React Native app with user database functionality, web API integration, charts for data visualization, and payment integration. This tutorial has provided a comprehensive overview of each aspect, empowering you to build powerful and versatile mobile applications. Keep exploring React Native's vast ecosystem to enhance your app further and leverage its full potential. Happy coding!
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Tuesday, 17 January 2023

How to Integrate ChatGPT In Android With TTS (Text-To-Speech).

AI (Artificial Intelligence) Technology has been progressing towards futuristic ideas on daily basis. OpenAI coming up with their R&D as ChatGPT is prominent development in this field. ChatGPT (Generative Pre-trained Transformer) is a chatbot launched by OpenAI in November 2022. It is built on top of OpenAI's GPT-3 family of large language models, and is fine-tuned with both supervised and reinforcement learning techniques.

Methods-
ChatGPT trained this model using Reinforcement Learning from Human Feedback (RLHF), using the same methods as InstructGPT, but with slight differences in the data collection setup. They trained an initial model using supervised fine-tuning: human AI trainers provided conversations in which they played both sides—the user and an AI assistant. Then provide the trainers access to model-written suggestions to help them compose their responses. They mixed this new dialogue dataset with the InstructGPT dataset, which are transformed into a dialogue format.


ChatGPT is fine-tuned from a model in the GPT-3.5 series, which finished training in early 2022. You can learn more about the 3.5 series here. ChatGPT and GPT 3.5 were trained on an Azure AI supercomputing infrastructure.

We as technophiles strongly believe in ‘Sharing Is Caring’. We have create a sample demo where we will integrate ChatGPT in Android to demonstrate how it works with TTS (Text-To-Speech).


Here, we have asked for food recipe via ChatGPT bot which is read by TTS bot. We can also create a recipe from a list of ingredients. There are unlimited use-cases and ideas that are possible to explore and make life easy and technological advance.

Refer the below link for complete sample code:-

Download Sample Code

Have a look on few code snippets,

//MainActivity.java
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package com.elitetechnority.chatgptdemo;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.os.StrictMode;
import android.speech.tts.TextToSpeech;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import com.theokanning.openai.OpenAiService;
import com.theokanning.openai.completion.CompletionRequest;
import com.theokanning.openai.completion.CompletionResult;

import java.util.Locale;

public class MainActivity extends AppCompatActivity {

    private TextToSpeech textToSpeech;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        OpenAiService service = new OpenAiService("Your Token");
        TextView tv_bot=(TextView)findViewById(R.id.tv_bot);
        EditText et_bot=(EditText)findViewById(R.id.et_bot);
        et_bot.setText("Tell about ChatGPT");
        Button btn_bot=(Button)findViewById(R.id.btn_bot);
        btn_bot.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                CompletionRequest completionRequest = CompletionRequest.builder()
                        .prompt(et_bot.getText().toString())
                        .model("text-davinci-003")
                        .topP(1.0)
                        .temperature(0.3)
                        .maxTokens(150)
                        .frequencyPenalty(0.0)
                        .presencePenalty(0.0)
                        .build();
                CompletionResult completionResult=service.createCompletion(completionRequest);
                System.out.println(completionResult);
                tv_bot.setText(completionResult.getChoices().get(0).getText());
                String toSpeak = tv_bot.getText().toString();
                textToSpeech.speak(toSpeak, TextToSpeech.QUEUE_FLUSH, null);
            }
        });

         textToSpeech=new TextToSpeech(getApplicationContext(), new TextToSpeech.OnInitListener() {
            @Override
            public void onInit(int status) {
                if(status != TextToSpeech.ERROR) {
                    textToSpeech.setLanguage(Locale.UK);
                }
            }
        });
    }

    @Override
    protected void onPause() {
        if(textToSpeech !=null){
            textToSpeech.stop();
            textToSpeech.shutdown();
        }
        super.onPause();
    }

    @Override
    protected void onDestroy() {
        if(textToSpeech !=null){
            textToSpeech.stop();
            textToSpeech.shutdown();
        }
        super.onDestroy();
    }
}
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Saturday, 14 December 2019

How To Build Real Time Chat Interface Using Firebase In Android.

The Firebase Realtime Database is a cloud-hosted database. Data is stored as JSON and synchronized in realtime to every connected client. When you build cross-platform apps with our iOS, Android, and JavaScript SDKs, all of your clients share one Realtime Database instance and automatically receive updates with the newest data.

We will apply the same concept for real time chat. Firstly, we will build chat interface with login and registration and than setup Firebase Realtime Database for messaging.

Refer the below link for complete sample code:-

Download Sample Code

Have a look on few code snippets,

 //activity_users.xml
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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="com.androidchatapp.Users"
    android:orientation="vertical">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="No users found!"
        android:id="@+id/noUsersText"
        android:visibility="gone"/>

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

//activity_chat.xml
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:background="#ffffff"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context="com.androidchatapp.Chat">

    <ScrollView
        android:layout_width="match_parent"
        android:layout_weight="20"
        android:layout_height="wrap_content"
        android:id="@+id/scrollView">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:id="@+id/layout1">

      </LinearLayout>
    </ScrollView>

    <include
        layout="@layout/message_area"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="bottom"
        android:layout_marginTop="5dp"/>
</LinearLayout>

//message_area.xml 
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/colorPrimaryDark"
    android:gravity="bottom"
    android:orientation="horizontal">

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:textColorHint="#CFD8DC"
        android:textColor="#CFD8DC"
        android:hint="Write a message..."
        android:id="@+id/messageArea"
        android:maxHeight="80dp"
        />

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="4"
        android:padding="4dp"
        android:src="@android:drawable/ic_menu_send"
        android:id="@+id/sendButton"/>
</LinearLayout>

//Users.java
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package com.elitetechnologies.realtimechat;

import android.app.ProgressDialog;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

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

import java.util.ArrayList;
import java.util.Iterator;

public class Users extends AppCompatActivity {
    ListView usersList;
    TextView noUsersText;
    ArrayList<String> al = new ArrayList<>();
    int totalUsers = 0;
    ProgressDialog pd;

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

        usersList = (ListView)findViewById(R.id.usersList);
        noUsersText = (TextView)findViewById(R.id.noUsersText);

        pd = new ProgressDialog(Users.this);
        pd.setMessage("Loading...");
        pd.show();

        String url = "https://real-time-chat-eb94c.firebaseio.com/users.json";

        StringRequest request = new StringRequest(Request.Method.GET, url, new Response.Listener<String>(){
            @Override
            public void onResponse(String s) {
                doOnSuccess(s);
            }
        },new Response.ErrorListener(){
            @Override
            public void onErrorResponse(VolleyError volleyError) {
                System.out.println("" + volleyError);
            }
        });

        RequestQueue rQueue = Volley.newRequestQueue(Users.this);
        rQueue.add(request);

        usersList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                UserDetails.chatWith = al.get(position);
                startActivity(new Intent(Users.this, Chat.class));
            }
        });
    }

    public void doOnSuccess(String s){
        try {
            JSONObject obj = new JSONObject(s);

            Iterator i = obj.keys();
            String key = "";

            while(i.hasNext()){
                key = i.next().toString();

                if(!key.equals(UserDetails.username)) {
                    al.add(key);
                }

                totalUsers++;
            }

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

        if(totalUsers <=1){
            noUsersText.setVisibility(View.VISIBLE);
            usersList.setVisibility(View.GONE);
        }
        else{
            noUsersText.setVisibility(View.GONE);
            usersList.setVisibility(View.VISIBLE);
            usersList.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, al));
        }

        pd.dismiss();
    }
}

//Chat.java
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package com.elitetechnologies.realtimechat;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ScrollView;
import android.widget.TextView;

import com.firebase.client.ChildEventListener;
import com.firebase.client.DataSnapshot;
import com.firebase.client.Firebase;
import com.firebase.client.FirebaseError;

import java.util.HashMap;
import java.util.Map;

public class Chat extends AppCompatActivity {
    LinearLayout layout;
    ImageView sendButton;
    EditText messageArea;
    ScrollView scrollView;
    Firebase reference1, reference2;

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

        layout = (LinearLayout)findViewById(R.id.layout1);
        sendButton = (ImageView)findViewById(R.id.sendButton);
        messageArea = (EditText)findViewById(R.id.messageArea);
        scrollView = (ScrollView)findViewById(R.id.scrollView);

        Firebase.setAndroidContext(this);
        reference1 = new Firebase("https://real-time-chat-eb94c.firebaseio.com/message/" + UserDetails.username + "_" + UserDetails.chatWith);
        reference2 = new Firebase("https://real-time-chat-eb94c.firebaseio.com/message/" + UserDetails.chatWith + "_" + UserDetails.username);

        sendButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String messageText = messageArea.getText().toString();

                if(!messageText.equals("")){
                    Map<String, String> map = new HashMap<String, String>();
                    map.put("message", messageText);
                    map.put("user", UserDetails.username);
                    reference1.push().setValue(map);
                    reference2.push().setValue(map);
                }
            }
        });

        reference1.addChildEventListener(new ChildEventListener() {
            @Override
            public void onChildAdded(DataSnapshot dataSnapshot, String s) {
                Map map = dataSnapshot.getValue(Map.class);
                String message = map.get("message").toString();
                String userName = map.get("user").toString();

                if(userName.equals(UserDetails.username)){
                    addMessageBox("You:-\n" + message, 1);
                }
                else{
                    addMessageBox(UserDetails.chatWith + ":-\n" + message, 2);
                }
            }

            @Override
            public void onChildChanged(DataSnapshot dataSnapshot, String s) {

            }

            @Override
            public void onChildRemoved(DataSnapshot dataSnapshot) {

            }

            @Override
            public void onChildMoved(DataSnapshot dataSnapshot, String s) {

            }

            @Override
            public void onCancelled(FirebaseError firebaseError) {

            }
        });
    }

    public void addMessageBox(String message, int type){
        TextView textView = new TextView(Chat.this);
        textView.setText(message);
        LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        lp.setMargins(0, 0, 0, 10);
        textView.setLayoutParams(lp);

        if(type == 1) {
            textView.setBackgroundResource(R.drawable.rounded_corner1);
        }
        else{
            textView.setBackgroundResource(R.drawable.rounded_corner2);
        }

        layout.addView(textView);
        scrollView.fullScroll(View.FOCUS_DOWN);
    }
}
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Thursday, 14 November 2019

Display Status Using Timeline View For Android.

A timeline is a display of a list of events in chronological order. Timelines can use any suitable scale representing time, suiting the subject and data; many use a linear scale, in which a unit of distance is equal to a set amount of time.

In this tutorial, we will see how to implement timeline view in Android. Below is the mock-up how we are expected to build,

Refer the below link for complete sample code:-

Download Sample Code

Have a look on few code snippets,

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

    <RelativeLayout
        android:layout_width="72dp"
        android:layout_height="match_parent">


        <View
            android:id="@+id/crowUpperLine"
            android:layout_width="25dp"
            android:layout_height="match_parent"
            android:layout_above="@+id/crowImg"
            android:layout_centerInParent="true"
            android:layout_centerVertical="true"
            android:background="@android:color/darker_gray" />

        <View
            android:id="@+id/crowLowerLine"
            android:layout_width="25dp"
            android:layout_height="match_parent"
            android:layout_below="@+id/crowImg"
            android:layout_centerInParent="true"
            android:layout_centerVertical="true"
            android:background="@android:color/darker_gray" />


        <View
            android:id="@+id/crowBackground"
            android:layout_width="25dp"
            android:layout_height="25dp"
            android:layout_centerInParent="true"
            android:layout_centerVertical="true" />

        <ImageView
            android:id="@+id/crowImg"
            android:layout_width="25dp"
            android:layout_height="25dp"
            android:layout_centerInParent="true"
            android:layout_centerVertical="true"
            android:layout_marginTop="-12.5dp"
            android:layout_marginBottom="-12.5dp" />


    </RelativeLayout>

    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:paddingLeft="16dp"
        android:paddingBottom="10dp"
        android:paddingRight="16dp">

        <TextView
            android:id="@+id/crowDate"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Date"
            android:paddingTop="10dp"
            android:textAppearance="?android:attr/textAppearanceSmall" />

        <TextView
            android:id="@+id/crowTitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/crowDate"
            android:layout_centerVertical="true"
            android:text="Title"
            android:textAppearance="?android:attr/textAppearanceListItem"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/crowDesc"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/crowTitle"
            android:layout_centerVertical="true"
            android:text="Description"
            android:textAppearance="?android:attr/textAppearanceSearchResultSubtitle" />

        <View
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="#d7f2eb"
            />
    </RelativeLayout>

</LinearLayout>

//activity_main.xml
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<?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"
    tools:context=".MainActivity">

    <ListView
        android:id="@+id/timeline_listView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:divider="@null"
        android:dividerHeight="0dp" />
</LinearLayout>

//TimelineRow.java
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package com.elitetechnologies.timelineview.TimelineView;


import android.graphics.Bitmap;

import java.util.Date;


public class TimelineRow {

    private int id;
    private Date date = null;
    private String title = null;
    private String description = null;
    private Bitmap image = null;
    private int bellowLineColor = 0;
    private int bellowLineSize = 6;
    private int imageSize = 50;
    private int backgroundColor = 0;
    private int backgroundSize = 50;
    private int dateColor = 0;
    private int titleColor = 0;
    private int descriptionColor = 0;

    public TimelineRow(int id) {
        this.id = id;
    }

    public TimelineRow(int id, Date date) {
        this.id = id;
        this.date = date;
    }


    public TimelineRow(int id, Date date, String title, String description) {
        this.id = id;
        this.date = date;
        this.title = title;
        this.description = description;
    }

    public TimelineRow(int id, Date date, String title, String description, Bitmap image, int bellowLineColor, int bellowLineSize, int imageSize) {
        this.id = id;
        this.date = date;
        this.title = title;
        this.description = description;
        this.image = image;
        this.bellowLineColor = bellowLineColor;
        this.bellowLineSize = bellowLineSize;
        this.imageSize = imageSize;
    }

    public TimelineRow(int id, Date date, String title, String description, Bitmap image, int bellowLineColor, int bellowLineSize, int imageSize, int backgroundColor, int backgroundSize) {
        this.id = id;
        this.date = date;
        this.title = title;
        this.description = description;
        this.image = image;
        this.bellowLineColor = bellowLineColor;
        this.bellowLineSize = bellowLineSize;
        this.imageSize = imageSize;
        this.backgroundColor = backgroundColor;
        this.backgroundSize = backgroundSize;
    }

    public TimelineRow(int id, Date date, String title, String description, Bitmap image, int bellowLineColor, int bellowLineSize, int imageSize, int backgroundColor, int backgroundSize, int dateColor, int titleColor, int descriptionColor) {
        this.id = id;
        this.date = date;
        this.title = title;
        this.description = description;
        this.image = image;
        this.bellowLineColor = bellowLineColor;
        this.bellowLineSize = bellowLineSize;
        this.imageSize = imageSize;
        this.backgroundColor = backgroundColor;
        this.backgroundSize = backgroundSize;
        this.dateColor = dateColor;
        this.titleColor = titleColor;
        this.descriptionColor = descriptionColor;
    }

    public int getBackgroundSize() {
        return backgroundSize;
    }

    public void setBackgroundSize(int backgroundSize) {
        this.backgroundSize = backgroundSize;
    }

    public int getBackgroundColor() {
        return backgroundColor;
    }

    public void setBackgroundColor(int backgroundColor) {
        this.backgroundColor = backgroundColor;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public int getImageSize() {
        return imageSize;
    }

    public void setImageSize(int imageSize) {
        this.imageSize = imageSize;
    }

    public int getBellowLineSize() {
        return bellowLineSize;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public void setBellowLineSize(int bellowLineSize) {
        this.bellowLineSize = bellowLineSize;
    }

    public int getBellowLineColor() {
        return bellowLineColor;
    }

    public void setBellowLineColor(int bellowLineColor) {
        this.bellowLineColor = bellowLineColor;
    }

    public Bitmap getImage() {
        return image;
    }

    public void setImage(Bitmap image) {
        this.image = image;
    }

    public Date getDate() {
        return date;
    }

    public void setDate(Date date) {
        this.date = date;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public int getDateColor() {
        return dateColor;
    }

    public void setDateColor(int dateColor) {
        this.dateColor = dateColor;
    }

    public int getTitleColor() {
        return titleColor;
    }

    public void setTitleColor(int titleColor) {
        this.titleColor = titleColor;
    }

    public int getDescriptionColor() {
        return descriptionColor;
    }

    public void setDescriptionColor(int descriptionColor) {
        this.descriptionColor = descriptionColor;
    }

}

//TimelineViewAdapter.java
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package com.elitetechnologies.timelineview.TimelineView;



import android.app.Activity;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffColorFilter;
import android.graphics.drawable.GradientDrawable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.elitetechnologies.timelineview.R;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.List;


public class TimelineViewAdapter extends ArrayAdapter<TimelineRow> {
    private Context context;
    private Resources res;
    private List<TimelineRow> RowDataList;
    private String AND;

    public TimelineViewAdapter(Context context, int resource, ArrayList<TimelineRow> objects, boolean orderTheList) {
        super(context, resource, objects);
        this.context = context;
        res = context.getResources();
        AND ="and";
        if (orderTheList)
            this.RowDataList = rearrangeByDate(objects);
        else
            this.RowDataList = objects;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        TimelineRow row = RowDataList.get(position);

        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
        View view = inflater.inflate(R.layout.ctimeline_row, null);

        TextView rowDate = (TextView) view.findViewById(R.id.crowDate);
        TextView rowTitle = (TextView) view.findViewById(R.id.crowTitle);
        TextView rowDescription = (TextView) view.findViewById(R.id.crowDesc);
        ImageView rowImage = (ImageView) view.findViewById(R.id.crowImg);
        View rowUpperLine = (View) view.findViewById(R.id.crowUpperLine);
        View rowLowerLine = (View) view.findViewById(R.id.crowLowerLine);


        final float scale = getContext().getResources().getDisplayMetrics().density;


        if (position == 0 && position == RowDataList.size() - 1) {
            rowUpperLine.setVisibility(View.INVISIBLE);
            rowLowerLine.setVisibility(View.INVISIBLE);
        } else if (position == 0) {
            int pixels = (int) (row.getBellowLineSize() * scale + 0.5f);

            rowUpperLine.setVisibility(View.INVISIBLE);
            rowLowerLine.setBackgroundColor(row.getBellowLineColor());
            rowLowerLine.getLayoutParams().width = pixels;
        } else if (position == RowDataList.size() - 1) {
            int pixels = (int) (RowDataList.get(position - 1).getBellowLineSize() * scale + 0.5f);

            rowLowerLine.setVisibility(View.INVISIBLE);
            rowUpperLine.setBackgroundColor(RowDataList.get(position - 1).getBellowLineColor());
            rowUpperLine.getLayoutParams().width = pixels;
        } else {
            int pixels = (int) (row.getBellowLineSize() * scale + 0.5f);
            int pixels2 = (int) (RowDataList.get(position - 1).getBellowLineSize() * scale + 0.5f);

            rowLowerLine.setBackgroundColor(row.getBellowLineColor());
            rowUpperLine.setBackgroundColor(RowDataList.get(position - 1).getBellowLineColor());
            rowLowerLine.getLayoutParams().width = pixels;
            rowUpperLine.getLayoutParams().width = pixels2;
        }

        if (position == 0 ||  position == RowDataList.size() - 1) {
            Bitmap tintBitmap = tintImage(BitmapFactory.decodeResource(context.getResources(), R.drawable.ic_srcdstpoint), Color.parseColor("#c44227"));
            row.setImage(tintBitmap);
        }else{
            Bitmap tintBitmap = tintImage(BitmapFactory.decodeResource(context.getResources(), R.drawable.ic_nodes), Color.parseColor("#f29d9d"));
            row.setImage(tintBitmap);
        }

        if(position<=2) {
            row.setBellowLineSize(12);
            row.setBellowLineColor(Color.parseColor("#9df2b1"));
        }


        rowDate.setText(getPastTime(row.getDate()));
        if (row.getDateColor() != 0)
            rowDate.setTextColor(row.getDateColor());
        if (row.getTitle() == null)
            rowTitle.setVisibility(View.GONE);
        else {
            rowTitle.setText(row.getTitle());
            if (row.getTitleColor() != 0)
                rowTitle.setTextColor(row.getTitleColor());
        }
        if (row.getDescription() == null)
            rowDescription.setVisibility(View.GONE);
        else {
            rowDescription.setText(row.getDescription());
            if (row.getDescriptionColor() != 0)
                rowDescription.setTextColor(row.getDescriptionColor());
        }

        if (row.getImage() != null) {
            rowImage.setImageBitmap(row.getImage());
        }

        int pixels = (int) (row.getImageSize() * scale + 0.5f);
        rowImage.getLayoutParams().width = pixels;
        rowImage.getLayoutParams().height = pixels;

        View backgroundView = view.findViewById(R.id.crowBackground);
        if (row.getBackgroundColor() == 0)
            backgroundView.setBackground(null);
        else {
            if (row.getBackgroundSize() == -1) {
                backgroundView.getLayoutParams().width = pixels;
                backgroundView.getLayoutParams().height = pixels;
            } else {
                int BackgroundPixels = (int) (row.getBackgroundSize() * scale + 0.5f);
                backgroundView.getLayoutParams().width = BackgroundPixels;
                backgroundView.getLayoutParams().height = BackgroundPixels;
            }
            GradientDrawable background = (GradientDrawable) backgroundView.getBackground();
            if (background != null) {
                background.setColor(row.getBackgroundColor());
            }
        }


        ViewGroup.MarginLayoutParams marginParams = (ViewGroup.MarginLayoutParams) rowImage.getLayoutParams();
        marginParams.setMargins(0, (int) (pixels / 2) * -1, 0, (pixels / 2) * -1);

        return view;
    }

    private String getPastTime(Date date) {

        if (date == null) return "";
        StringBuilder dateText = new StringBuilder();
        Date today = new Date();
        long diff = (today.getTime() - date.getTime()) / 1000;

        long years = diff / (60 * 60 * 24 * 30 * 12);
        long months = (diff / (60 * 60 * 24 * 30)) % 12;
        long days = (diff / (60 * 60 * 24)) % 30;
        long hours = (diff / (60 * 60)) % 24;
        long minutes = (diff / 60) % 60;
        long seconds = diff % 60;

        if (years > 0) {
            appendPastTime(dateText, years, R.plurals.years, months, R.plurals.months);
        } else if (months > 0) {
            appendPastTime(dateText, months, R.plurals.months, days, R.plurals.days);
        } else if (days > 0) {
            appendPastTime(dateText, days, R.plurals.days, hours, R.plurals.hours);
        } else if (hours > 0) {
            appendPastTime(dateText, hours, R.plurals.hours, minutes, R.plurals.minutes);
        } else if (minutes > 0) {
            appendPastTime(dateText, minutes, R.plurals.minutes, seconds, R.plurals.seconds);
        } else if (seconds >= 0) {
            dateText.append(res.getQuantityString(R.plurals.seconds, (int) seconds, (int) seconds));
        }

        return dateText.toString();
    }

    private void appendPastTime(StringBuilder s,
                                long timespan, int nameId,
                                long timespanNext, int nameNextId) {

        s.append(res.getQuantityString(nameId, (int) timespan, timespan));
        if (timespanNext > 0) {
            s.append(' ').append(AND).append(' ');
            s.append(res.getQuantityString(nameNextId, (int) timespanNext, timespanNext));
        }
    }

    private ArrayList<TimelineRow> rearrangeByDate(ArrayList<TimelineRow> objects) {
        if (objects.get(0) == null) return objects;
        int size = objects.size();
        for (int i = 0; i < size - 1; i++) {
            for (int j = i + 1; j < size; j++) {
                if(objects.get(i).getDate()!= null && objects.get(j).getDate() != null)
                    if (objects.get(i).getDate().compareTo(objects.get(j).getDate()) <= 0)
                        Collections.swap(objects, i, j);
            }

        }
        return objects;
    }

    private static Bitmap tintImage(Bitmap bitmap, int color) {
        Paint paint = new Paint();
        paint.setColorFilter(new PorterDuffColorFilter(color, PorterDuff.Mode.SRC_IN));
        Bitmap bitmapResult = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmapResult);
        canvas.drawBitmap(bitmap, 0, 0, paint);
        return bitmapResult;
    }
}

//MainActivity.java
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package com.elitetechnologies.timelineview;

import android.annotation.SuppressLint;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.Toast;

import com.elitetechnologies.timelineview.TimelineView.TimelineRow;
import com.elitetechnologies.timelineview.TimelineView.TimelineViewAdapter;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Random;
import java.util.concurrent.ThreadLocalRandom;

public class MainActivity extends AppCompatActivity {

    //Create Timeline Rows List
    private ArrayList<TimelineRow> timelineRowsList = new ArrayList<>();
    ArrayAdapter<TimelineRow> myAdapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);// Create Timeline rows List
        // Add Random Rows to the List
        for (int i = 0; i < 15; i++) {
            //add the new row to the list
            timelineRowsList.add(createRandomTimelineRow(i));
        }
        //Create the Timeline Adapter
        myAdapter = new TimelineViewAdapter(this, 0, timelineRowsList,
                //if true, list will be sorted by date
                true);
        //Get the ListView and Bind it with the Timeline Adapter
        ListView timeline_listView = (ListView) findViewById(R.id.timeline_listView);
        timeline_listView.setAdapter(myAdapter);
        myAdapter.notifyDataSetChanged();

        //if you wish to handle the clicks on the rows
        AdapterView.OnItemClickListener adapterListener = new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                TimelineRow row = timelineRowsList.get(position);
                Toast.makeText(MainActivity.this, row.getTitle()+"at position"+position, Toast.LENGTH_SHORT).show();
            }
        };
        timeline_listView.setOnItemClickListener(adapterListener);
    }

    //Method to create new Timeline Row
    private TimelineRow createRandomTimelineRow(int id) {
        // Create new timeline row (pass your Id)
        TimelineRow myRow = new TimelineRow(id);

        //to set the row Date (optional)
        myRow.setDate(getRandomDate());
        //to set the row Title (optional)
        myRow.setTitle("Title " + id);
        myRow.setTitleColor(Color.parseColor("#3295a8"));
        //to set the row Description (optional)
        myRow.setDescription("Lorem ipsum dolor sit amet, consectetur adipiscing elit.");
        myRow.setDescriptionColor(Color.parseColor("#32a8a4"));
        //to set row Below Line Color (optional)
        myRow.setBellowLineColor(Color.LTGRAY);
        return myRow;
    }

    @SuppressLint("NewApi")
    public Date getRandomDate() {
        SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
        Date startDate = null;
        Date endDate = new Date();
        try {
            startDate = sdf.parse("14/02/2020");
            long random = ThreadLocalRandom.current().nextLong(startDate.getTime(), endDate.getTime());
            endDate = new Date(random);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return endDate;
    }

}
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