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Author Archives: sochinda

About sochinda

I really like new technology!!

How to use sudo with Touch ID on your Mac

By: Cabel (Twitter: @cabel)

How to enable Touch ID for sudo commands on your MacBook Pro with Touch Bar

  1. In Safari, paste the following into the search bar: file:///etc/pam.d/sudo.

    Alternatively, you can edit the file within the Terminal app itself using command-line text editors like emacs or nano; if you choose to do this, go to step 8, and skip steps 10-12.

  2. Press Command-I with the sudo file highlighted to open up the information screen.

  3. Click on the Lock icon in the bottom right corner.
  4. Enter your authentication information (or use Touch ID).
  5. Change the privileges of all users to Read & Write.

  6. Download TextWrangler, a free plain text editor, or use the plain text editor of your choice.
  7. Open the sudo file in TextWrangler (or equivalent).
  8. Paste auth sufficient pam_tid.so on line 2 of the document (underneath the initial comment line)

    Note: If you get a note about the document being locked, go back to step 2-5 and make sure you’ve enabled Read & Write privileges on the document.

  9. Save the sudo file and close it.

  10. In Finder, press Command-I with the sudo file highlighted to open up the information screen.
  11. Change the privileges on all users to Read only.
  12. Click on the Lock icon in the bottom right corner.

Now, when you open Terminal and attempt a sudo command, you should be prompted with a Touch ID authentication in lieu of entering your administrator password.

Copy from: https://www.imore.com/how-use-sudo-your-mac-touch-id

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Posted by on September 24, 2018 in Mac

 

Install npm packages without sudo

By Tim Kamanin

1) Set yourself as an owner of ~/.npm directory, like this:

sudo chown -R $(whoami) ~/.npm

and if error persists, set yourself as an owner /usr/local/lib/node_modules directory too, like this:

sudo chown -R $(whoami) /usr/local/lib/node_modules

Now you can install npm packages without sudo.

 

Copy from https://timonweb.com/posts/install-npm-packages-without-sudo/

 

 
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Posted by on September 20, 2018 in NodeJs

 

Obfuscating Android Code with Proguard

By:

First enable minifyEnabled in your build.gradle file, like

minifyEnabled true

After this, add below lines in progurad-rules.txt file

-keep class yourpackage.** { *; }
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-verbose

For checking that its working fine go to:

http://www.javadecompilers.com/apktool website so that you can verify after decompilation.

It will work and your classes will be hidden completely.

Copyfrom: https://stackoverflow.com/questions/17290023/obfuscation-in-android-studio

http://medium/@rakawestu/obfuscating-android-code-with-proguard-d43234df9785

 
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Posted by on April 5, 2018 in Android, Mobile Development

 

Git

Git

$ git init
$ git remote add origin [Git URL]
$ git add .
$ git commit -m “[Message]”
$ git push origin master

 
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Posted by on March 27, 2018 in Control Version, Git

 

Change GoPath in mac

 

Open terminal:

export GOPATH=[Full path of your GO project]  // eg. /Users/username/go
export PATH=$GOPATH/bin:$PATH

 

from https://gist.github.com/molivier/271bba5d67de1583a8e3

 
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Posted by on February 14, 2018 in Go Language

 

How To Install and Use Docker on Ubuntu 16.04

By:

$ sudo apt-get install apt-transport-https ca-certificates curl software-properties-common
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add –
$ sudo add-apt-repository “deb [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable”
$ sudo apt-get update

$ apt-cache search docker-ce

$ sudo apt-get install docker-ce

 
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Posted by on February 13, 2018 in Docker, Ubuntu

 

Horizontal RecyclerView in Vertical RecyclerView like Google Play Store

By: 

Step: 1
======
Create two Model Classes like below.

SingleItemModel.java

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package com.pratap.gplaystore.models;

/**
 * Created by pratap.kesaboyina on 01-12-2015.
 */
public class SingleItemModel {


    private String name;
    private String url;
    private String description;


    public SingleItemModel() {
    }

    public SingleItemModel(String name, String url) {
        this.name = name;
        this.url = url;
    }


    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getDescription() {
        return description;
    }

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


}

SectionDataModel.java

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package com.pratap.gplaystore.models;

import java.util.ArrayList;

/**
 * Created by pratap.kesaboyina on 30-11-2015.
 */
public class SectionDataModel {



    private String headerTitle;
    private ArrayList<SingleItemModel> allItemsInSection;


    public SectionDataModel() {

    }
    public SectionDataModel(String headerTitle, ArrayList<SingleItemModel> allItemsInSection) {
        this.headerTitle = headerTitle;
        this.allItemsInSection = allItemsInSection;
    }



    public String getHeaderTitle() {
        return headerTitle;
    }

    public void setHeaderTitle(String headerTitle) {
        this.headerTitle = headerTitle;
    }

    public ArrayList<SingleItemModel> getAllItemsInSection() {
        return allItemsInSection;
    }

    public void setAllItemsInSection(ArrayList<SingleItemModel> allItemsInSection) {
        this.allItemsInSection = allItemsInSection;
    }


}

Step: 2
======
Create an Activity with RecyclerView to show the list in vertical order.

MainActivity.java

 

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package com.pratap.gplaystore;

import android.os.Bundle;
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 com.pratap.gplaystore.adapters.RecyclerViewDataAdapter;
import com.pratap.gplaystore.models.SectionDataModel;
import com.pratap.gplaystore.models.SingleItemModel;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    private Toolbar toolbar;


    ArrayList<SectionDataModel> allSampleData;


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

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

        allSampleData = new ArrayList<SectionDataModel>();

        if (toolbar != null) {
            setSupportActionBar(toolbar);
            toolbar.setTitle("G PlayStore");

        }


        createDummyData();


        RecyclerView my_recycler_view = (RecyclerView) findViewById(R.id.my_recycler_view);

        my_recycler_view.setHasFixedSize(true);

        RecyclerViewDataAdapter adapter = new RecyclerViewDataAdapter(this, allSampleData);

        my_recycler_view.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));

        my_recycler_view.setAdapter(adapter);


    }

    public void createDummyData() {
        for (int i = 1; i <= 5; i++) {

            SectionDataModel dm = new SectionDataModel();

            dm.setHeaderTitle("Section " + i);

            ArrayList<SingleItemModel> singleItem = new ArrayList<SingleItemModel>();
            for (int j = 0; j <= 5; j++) {
                singleItem.add(new SingleItemModel("Item " + j, "URL " + j));
            }

            dm.setAllItemsInSection(singleItem);

            allSampleData.add(dm);

        }
    }
}

Create an XML Layout for the above activity class

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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        android:elevation="8dp"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
        app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />


    <android.support.v7.widget.RecyclerView
        android:id="@+id/my_recycler_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scrollbars="none" />


</LinearLayout>

Step: 3
======
Now Create an Adapter Class for the recyclerView in the MainActivity.


RecyclerViewDataAdapter.java

 

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package com.pratap.gplaystore.adapters;

/**
 * Created by pratap.kesaboyina on 24-12-2014.
 */
import android.content.Context;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import com.pratap.gplaystore.R;
import com.pratap.gplaystore.models.SectionDataModel;

import java.util.ArrayList;

public class RecyclerViewDataAdapter extends RecyclerView.Adapter<RecyclerViewDataAdapter.ItemRowHolder> {

    private ArrayList<SectionDataModel> dataList;
    private Context mContext;

    public RecyclerViewDataAdapter(Context context, ArrayList<SectionDataModel> dataList) {
        this.dataList = dataList;
        this.mContext = context;
    }

    @Override
    public ItemRowHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_item, null);
        ItemRowHolder mh = new ItemRowHolder(v);
        return mh;
    }

    @Override
    public void onBindViewHolder(ItemRowHolder itemRowHolder, int i) {

        final String sectionName = dataList.get(i).getHeaderTitle();

        ArrayList singleSectionItems = dataList.get(i).getAllItemsInSection();

        itemRowHolder.itemTitle.setText(sectionName);

        SectionListDataAdapter itemListDataAdapter = new SectionListDataAdapter(mContext, singleSectionItems);

        itemRowHolder.recycler_view_list.setHasFixedSize(true);
        itemRowHolder.recycler_view_list.setLayoutManager(new LinearLayoutManager(mContext, LinearLayoutManager.HORIZONTAL, false));
        itemRowHolder.recycler_view_list.setAdapter(itemListDataAdapter);


        itemRowHolder.btnMore.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {


                Toast.makeText(v.getContext(), "click event on more, "+sectionName , Toast.LENGTH_SHORT).show();



            }
        });


       /* Glide.with(mContext)
                .load(feedItem.getImageURL())
                .diskCacheStrategy(DiskCacheStrategy.ALL)
                .centerCrop()
                .error(R.drawable.bg)
                .into(feedListRowHolder.thumbView);*/
    }

    @Override
    public int getItemCount() {
        return (null != dataList ? dataList.size() : 0);
    }

    public class ItemRowHolder extends RecyclerView.ViewHolder {

        protected TextView itemTitle;

        protected RecyclerView recycler_view_list;

        protected Button btnMore;



        public ItemRowHolder(View view) {
            super(view);

            this.itemTitle = (TextView) view.findViewById(R.id.itemTitle);
            this.recycler_view_list = (RecyclerView) view.findViewById(R.id.recycler_view_list);
            this.btnMore= (Button) view.findViewById(R.id.btnMore);


        }

    }

}

Now create an xml Layout file for the above adapter class.

list_item.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:background="?android:selectableItemBackground"
    android:orientation="vertical"
    android:padding="5dp">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="2dp">


        <TextView
            android:id="@+id/itemTitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true"
            android:layout_centerVertical="true"
            android:layout_gravity="center_vertical"
            android:layout_toLeftOf="@+id/btnMore"
            android:text="Sample title"
            android:textColor="@android:color/black"
            android:textSize="18sp" />

        <Button
            android:id="@+id/btnMore"
            android:layout_width="wrap_content"
            android:layout_height="42dp"
            android:layout_alignParentEnd="true"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:theme="@style/MyButton"
            android:text="more"
            android:textColor="#FFF" />


    </RelativeLayout>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view_list"
        android:layout_width="match_parent"
        android:layout_height="160dp"
        android:layout_gravity="center_vertical"
        android:orientation="horizontal" />


</LinearLayout>

Step: 4
======

Now , In order to make a horizontal RecyclerView , we need create a layout and Adapter class for each row.

list_single_card.xml

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<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    app:cardCornerRadius="5dp"
    app:cardUseCompatPadding="true"
    >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="0dp"
        android:background="?android:selectableItemBackground"
        android:orientation="vertical">

        <ImageView
            android:id="@+id/itemImage"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:layout_gravity="center_horizontal"
            android:scaleType="fitCenter"
            android:src="@drawable/android" />


        <TextView
            android:id="@+id/tvTitle"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/itemImage"
            android:gravity="center"
            android:padding="5dp"
            android:text="Sample title"
            android:textColor="@android:color/black"
            android:textSize="18sp" />


    </LinearLayout>

</android.support.v7.widget.CardView>

 


The Adapter Class for Horizontal RecyclerView


SectionListDataAdapter.java

 

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package com.pratap.gplaystore.adapters;

/**
 * Created by pratap.kesaboyina on 24-12-2014.
 */

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.pratap.gplaystore.R;
import com.pratap.gplaystore.models.SingleItemModel;

import java.util.ArrayList;

public class SectionListDataAdapter extends RecyclerView.Adapter<SectionListDataAdapter.SingleItemRowHolder> {

    private ArrayList<SingleItemModel> itemsList;
    private Context mContext;

    public SectionListDataAdapter(Context context, ArrayList<SingleItemModel> itemsList) {
        this.itemsList = itemsList;
        this.mContext = context;
    }

    @Override
    public SingleItemRowHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_single_card, null);
        SingleItemRowHolder mh = new SingleItemRowHolder(v);
        return mh;
    }

    @Override
    public void onBindViewHolder(SingleItemRowHolder holder, int i) {

        SingleItemModel singleItem = itemsList.get(i);

        holder.tvTitle.setText(singleItem.getName());


       /* Glide.with(mContext)
                .load(feedItem.getImageURL())
                .diskCacheStrategy(DiskCacheStrategy.ALL)
                .centerCrop()
                .error(R.drawable.bg)
                .into(feedListRowHolder.thumbView);*/
    }

    @Override
    public int getItemCount() {
        return (null != itemsList ? itemsList.size() : 0);
    }

    public class SingleItemRowHolder extends RecyclerView.ViewHolder {

        protected TextView tvTitle;

        protected ImageView itemImage;


        public SingleItemRowHolder(View view) {
            super(view);

            this.tvTitle = (TextView) view.findViewById(R.id.tvTitle);
            this.itemImage = (ImageView) view.findViewById(R.id.itemImage);


            view.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {


                    Toast.makeText(v.getContext(), tvTitle.getText(), Toast.LENGTH_SHORT).show();

                }
            });


        }

    }

}

ScreenShots
=========

Source code
========
DropBox Link

Demo
========

Copy from: http://android-pratap.blogspot.com/2015/12/horizontal-recyclerview-in-vertical.html

 
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Posted by on February 8, 2018 in Android, Mobile Development