recyclerview android list example

 recyclerview android list example

The RecyclerView category extends the ViewGroup category and implements the ScrollingView interface. it's introduced in candy. it's a complicated version of the ListView with improved performance and alternative advantages. RecyclerView is generally accustomed style the interface with the fine-grain management over the lists and grids of robot application.

In this tutorial, we are going to produce a listing of things with ImageView (for the icon) and TextView (for description) victimization RecyclerView and performs click perceiver on the item of its list.

  for the more recycler view  detail follow the link: developer google recyclerview .

The RecyclerView widget is a more advanced and flexible version of ListView.

In the RecyclerView model, several different components work together to display your data. The overall container for your user interface is a RecyclerView object that you add to your layout. The RecyclerView fills itself with views provided by a layout manager that you provide. You can use one of our standard layout managers (such as LinearLayoutManager or GridLayoutManager), or implement your own.

 

 

 1.build.gradle:

apply plugin: 'com.android.application'

android {

    compileSdkVersion 28

    defaultConfig {

        applicationId "com.akash.recyclerview"

        minSdkVersion 14

        targetSdkVersion 28

        versionCode 1

        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

    }

    buildTypes {

        release {

            minifyEnabled false

            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'

        }

    }

}

dependencies {

    implementation fileTree(dir: 'libs', include: ['*.jar'])

    implementation 'com.android.support:appcompat-v7:28.0.0'

    implementation 'com.android.support.constraint:constraint-layout:1.1.3'

    testImplementation 'junit:junit:4.12'

    androidTestImplementation 'com.android.support.test:runner:1.0.2'

    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

    implementation 'com.android.support:recyclerview-v7:28.0.0'  

}

2.create a drawable under xml file name is border.xml:

<?xml version="1.0" encoding="utf-8"?>

<shape xmlns:android="http://schemas.android.com/apk/res/android"

    android:shape="rectangle">

    <solid android:color="#FFFFFF" />

    <stroke

        android:width="1dp"

        android:color="#CCCCCC" />

</shape>

3.dimens.xml:

<resources>

    <!-- Default screen margins, per the Android Design guidelines. -->

    <dimen name="activity_horizontal_margin">16dp</dimen>

    <dimen name="activity_vertical_margin">16dp</dimen>

    <dimen name="nav_header_vertical_spacing">8dp</dimen>

    <dimen name="nav_header_height">176dp</dimen>

    <dimen name="fab_margin">16dp</dimen>

</resources>

4.MyListAdapter.java:

package com.akash.recyclerview;

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.RelativeLayout;

import android.widget.TextView;

import android.widget.Toast;

public class MyListAdapter extends RecyclerView.Adapter<MyListAdapter.ViewHolder>{

    private MyListData[] listdata;

    // RecyclerView recyclerView;

    public MyListAdapter(MyListData[] listdata) {

        this.listdata = listdata;

    }

    @Override

    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());

        View listItem= layoutInflater.inflate(R.layout.list_item, parent, false);

        ViewHolder viewHolder = new ViewHolder(listItem);

        return viewHolder;

    }

    @Override

    public void onBindViewHolder(ViewHolder holder, int position) {

        final MyListData myListData = listdata[position];

        holder.textView.setText(listdata[position].getDescription());

        holder.imageView.setImageResource(listdata[position].getImgId());

        holder.relativeLayout.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                Toast.makeText(view.getContext(),"click on item: "+myListData.getDescription(),Toast.LENGTH_LONG).show();

            }

        });

    }

    @Override

    public int getItemCount() {

        return listdata.length;

    }

    public static class ViewHolder extends RecyclerView.ViewHolder {

        public ImageView imageView;

        public TextView textView;

        public RelativeLayout relativeLayout;

        public ViewHolder(View itemView) {

            super(itemView);

            this.imageView = (ImageView) itemView.findViewById(R.id.imageView);

            this.textView = (TextView) itemView.findViewById(R.id.textView);

            relativeLayout = (RelativeLayout)itemView.findViewById(R.id.relativeLayout);

        }

    }

}

5.MyListData.java:

package com.akash.recyclerview;

public class MyListData{

    private String description;

    private int imgId;

    public MyListData(String description, int imgId) {

        this.description = description;

        this.imgId = imgId;

    }

    public String getDescription() {

        return description;

    }

    public void setDescription(String description) {

        this.description = description;

    }

    public int getImgId() {

        return imgId;

    }

    public void setImgId(int imgId) {

        this.imgId = imgId;

    }

}

6.MainActivity.java:

package com.akash.recyclerview;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.support.v7.widget.LinearLayoutManager;

import android.support.v7.widget.RecyclerView;

public class MainActivity extends AppCompatActivity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        MyListData[] myListData = new MyListData[] {

                new MyListData("Email", android.R.drawable.ic_dialog_email),

                new MyListData("Info", android.R.drawable.ic_dialog_info),

                new MyListData("Delete", android.R.drawable.ic_delete),

                new MyListData("Dialer", android.R.drawable.ic_dialog_dialer),

                new MyListData("Alert", android.R.drawable.ic_dialog_alert),

                new MyListData("Map", android.R.drawable.ic_dialog_map),

                new MyListData("Email", android.R.drawable.ic_dialog_email),

                new MyListData("Info", android.R.drawable.ic_dialog_info),

                new MyListData("Delete", android.R.drawable.ic_delete),

                new MyListData("Dialer", android.R.drawable.ic_dialog_dialer),

                new MyListData("Alert", android.R.drawable.ic_dialog_alert),

                new MyListData("Map", android.R.drawable.ic_dialog_map),

        };

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

        MyListAdapter adapter = new MyListAdapter(myListData);

        recyclerView.setHasFixedSize(true);

        recyclerView.setLayoutManager(new LinearLayoutManager(this));

        recyclerView.setAdapter(adapter);

    }

}

7.activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>

<android.support.v7.widget.RecyclerView

    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:scrollbars="vertical"

    android:id="@+id/recyclerView"

    tools:context="example.javatpoint.com.recyclerviewlist.MainActivity">

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

8.list_item.xml:

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:id="@+id/relativeLayout"

    android:layout_width="match_parent"

    android:layout_height="?android:attr/listPreferredItemHeightLarge"

    android:background="@drawable/border">

    <ImageView

        android:id="@+id/imageView"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_centerVertical="true"

        android:layout_alignParentStart="true"

        android:layout_alignParentLeft="true"

        android:layout_marginStart="@dimen/activity_horizontal_margin"

        android:layout_marginEnd="@dimen/activity_horizontal_margin"

        android:contentDescription="Icon" />

    <TextView

        android:id="@+id/textView"

        android:layout_width="wrap_content"

        android:layout_height="match_parent"

        android:layout_toEndOf="@id/imageView"

        android:layout_toRightOf="@id/imageView"

        android:gravity="center_vertical"

        android:textSize="16sp"/>

</RelativeLayout>

9.AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.akash.recyclerview">

    <application

        android:allowBackup="true"

        android:icon="@mipmap/ic_launcher"

        android:label="@string/app_name"

        android:roundIcon="@mipmap/ic_launcher_round"

        android:supportsRtl="true"

        android:theme="@style/AppTheme">

        <activity android:name=".MainActivity">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

10.Output: