Android Recycler GridView Example

Hello friends today i am going to share a good tutorial of recycler list view .Please follow me step by step ....

                

Donwload full source code
http://viid.me/qi0v4T
Step 1 : Create a project Recycler View Example with packagename com.ritesh.recyclerview and activity  MainActivity.java alongwith activity_main.xml layout

Step 2 : Open build.gradle and paste this code and sync your project

compile 'com.android.support:appcompat-v7:25.1.0'
testCompile 'junit:junit:4.12'
compile 'com.android.support:recyclerview-v7:25.1.0'

after adding this code your build.gradle look like this

apply plugin: 'com.android.application'

android {
 compileSdkVersion 25
 buildToolsVersion "25.0.2"
 defaultConfig {
 applicationId "com.ritesh.recyclerview"
 minSdkVersion 10
 targetSdkVersion 25
 versionCode 1
 versionName "1.0"
 testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
 }
 buildTypes {
 release {
 minifyEnabled false
 proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
 }
 }
}

dependencies {
 compile fileTree(include: ['*.jar'], dir: 'libs')
 androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
 exclude group: 'com.android.support', module: 'support-annotations'
 })
 compile 'com.android.support:appcompat-v7:25.1.0'
 testCompile 'junit:junit:4.12'
 compile 'com.android.support:recyclerview-v7:25.1.0'
}

Step 3 : colors.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
 <color name="colorPrimary">#3F51B5</color>
 <color name="colorPrimaryDark">#303F9F</color>
 <color name="colorAccent">#FF4081</color>
</resources>

Step 4 : 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>
</resources>

Step 5 :your  styles.xml code like this


<resources>

 <!-- Base application theme. -->
 <style name="AppTheme" parent="Theme.AppCompat">
 <!-- Customize your theme here. -->
 <item name="colorPrimary">@color/colorPrimary</item>
 <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
 <item name="colorAccent">@color/colorAccent</item>
 </style>

</resources>

Step 6 :your  AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
 package="com.ritesh.recyclerview">

 <application
 android:allowBackup="true"
 android:icon="@mipmap/ic_launcher"
 android:label="@string/app_name"
 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>


Step 6 :Your complete MainActivity.java code like this


package com.ritesh.recyclerview;

import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.GridLayoutManager;
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.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

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

 ArrayList<String> list=new ArrayList<>();
 for (int i=0;i<40;i++) {
 list.add("Ritesh List Item "+i);
 }


 RecyclerView recyclerView = (RecyclerView)findViewById(R.id.recycler_view);
 recyclerView.setHasFixedSize(true);
RecyclerView.LayoutManager layoutManager = new GridLayoutManager(MainActivity.this,3);
recyclerView.setLayoutManager(layoutManager);
 MyRecyclerAdapter adapter = new MyRecyclerAdapter(MainActivity.this,list);
 recyclerView.setAdapter(adapter);


 }

 public class MyRecyclerAdapter extends RecyclerView.Adapter<MyRecyclerAdapter.ViewHolder> {
 private ArrayList<String> list;
 private Context context;
 private int lastPosition = -1;

 public MyRecyclerAdapter(Context context, ArrayList<String> list1) {
 this.list = list1;
 this.context = context;

 }

 @Override
 public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
 View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_item, viewGroup, false);
 return new ViewHolder(view);
 }

 @Override
 public void onBindViewHolder(MyRecyclerAdapter.ViewHolder viewHolder, final int i) {

 viewHolder.textView_name.setText(String.valueOf(list.get(i)));


 viewHolder.lnCover.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View view) {
 Toast.makeText(context,"Item Clicked "+i,Toast.LENGTH_SHORT).show();
 }
 });
 }

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

 public class ViewHolder extends RecyclerView.ViewHolder{
 public RelativeLayout lnCover;
 public TextView textView_name;

 public ViewHolder(View view) {
 super(view);
 lnCover = (RelativeLayout) view
 .findViewById(R.id.lnCover);
 textView_name = (TextView) view
 .findViewById(R.id.textView_name);
 }
 }

 }



 }


Step 6 :Your activity_main.xml code like this


<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:id="@+id/activity_main"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
android:background="@android:color/white"
 >


 <android.support.v7.widget.RecyclerView
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:id="@+id/recycler_view"
 android:layout_alignParentTop="true"
 android:layout_centerHorizontal="true" />
</RelativeLayout>

Step 7 :Your list_item.xml code like this
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 android:layout_width="wrap_content"
 android:id="@+id/lnCover"
 android:paddingRight="8dp"
 android:background="@android:color/white"
 android:layout_height="wrap_content">

 <ImageView
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 app:srcCompat="@android:drawable/ic_lock_lock"
 android:layout_alignParentTop="true"
 android:layout_centerHorizontal="true"
 android:layout_marginTop="8dp"
 android:id="@+id/imageView2" />

 <TextView
 android:text="TextView"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
android:gravity="center_horizontal"
 android:layout_marginLeft="15dp"
 android:layout_marginTop="8dp"
 android:textColor="@android:color/black"
 android:textSize="17sp"
 android:layout_below="@+id/imageView2"

 android:id="@+id/textView_name" />
</RelativeLayout>

Step 7 : Run your project