Here, I have create a RecyclerView app in android .The RecyclerView is new advanced widget and flexible version of ListView.Below i have described step by step recycler view ..
Step(1)- In (build.gradle) folder Add first dependencies .
'com.android.support:recyclerview-v7:21.0.+'
Step(2)-Create a new class(MyAdapter)
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
private ArrayList<MyPojo> pojos;
// Provide a reference to the views for each data item
// Complex data items may need more than one view per item, and
// you provide access to all the views for a data item in a view holder
public static class ViewHolder extends RecyclerView.ViewHolder {
// each data item is just a string in this case
public View view;
public ViewHolder(View v) {
super(v);
view = v;
}
}
// Provide a suitable constructor (depends on the kind of dataset)
public MyAdapter(ArrayList<MyPojo> pojos) {
this.pojos = pojos;
}
// Create new views (invoked by the layout manager)
@Override
public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
// create a new view
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.row, parent, false);
// set the view's size, margins, paddings and layout parameters
ViewHolder vh = new ViewHolder(v);
return vh;
}public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
private ArrayList<MyPojo> pojos;
// Provide a reference to the views for each data item
// Complex data items may need more than one view per item, and
// you provide access to all the views for a data item in a view holder
public static class ViewHolder extends RecyclerView.ViewHolder {
// each data item is just a string in this case
public View view;
public ViewHolder(View v) {
super(v);
view = v;
}
}
// Provide a suitable constructor (depends on the kind of dataset)
public MyAdapter(ArrayList<MyPojo> pojos) {
this.pojos = pojos;
}
// Create new views (invoked by the layout manager)
@Override
public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
// create a new view
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.row, parent, false);
// set the view's size, margins, paddings and layout parameters
ViewHolder vh = new ViewHolder(v);
return vh;
}
// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
// - get element from your dataset at this position
// - replace the contents of the view with that element
TextView title =(TextView) holder.view.findViewById(R.id.title);
TextView desc = (TextView) holder.view.findViewById(R.id.desc);
final ImageView imageView =(ImageView)holder.view.findViewById(R.id.imageView);
final ImageView imageView1=(ImageView)holder.view.findViewById(R.id.imageView2);
title.setText(pojos.get(position).getTitle());
desc.setText(pojos.get(position).getDesc());
imageView.setImageResource(pojos.get(position).getImage());
imageView1.setImageResource(pojos.get(position).getImage());
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
}
// Return the size of your dataset (invoked by the layout manager)
@Override
public int getItemCount() {
return pojos.size();
}
// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
// - get element from your dataset at this position
// - replace the contents of the view with that element
TextView title =(TextView) holder.view.findViewById(R.id.title);
TextView desc = (TextView) holder.view.findViewById(R.id.desc);
final ImageView imageView =(ImageView)holder.view.findViewById(R.id.imageView);
final ImageView imageView1=(ImageView)holder.view.findViewById(R.id.imageView2);
title.setText(pojos.get(position).getTitle());
desc.setText(pojos.get(position).getDesc());
imageView.setImageResource(pojos.get(position).getImage());
imageView1.setImageResource(pojos.get(position).getImage());
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
}
// Return the size of your dataset (invoked by the layout manager)
@Override
public int getItemCount() {
return pojos.size();
}
}
Step(3)- Making Layout XML(activity_main.xml)
<RelativeLayout 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:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">
<!-- A RecyclerView with some commonly used attributes -->
<android.support.v7.widget.RecyclerView
android:id="@+id/my_recycler_view"
android:scrollbars="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#dbfffe" />
</RelativeLayout>
Step(4)-Create new Class for adding data (likename-Mypojo)
public class MyPojo {
String title;
String desc;
int image;
public MyPojo(String title,String desc,int image){
this.title =title;
this.desc =desc;
this.image =image;
}
public String getTitle(){
return title;
}
public String getDesc(){
return desc;
}
public int getImage(){
return image;
}
}
Step(5)-Create a new class for making viewholder.
public class RecyclerViewHolder extends LinearLayout {
Context mContext;
RecyclerView mLog;
public RecyclerViewHolder(Context context)
{
super(context);
mContext =context;
setup();
}
public RecyclerViewHolder(Context context,AttributeSet attrs){
super(context,attrs);
mContext =context;
setup();
}
private void setup(){
LayoutInflater inflater=(LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.row, this);
}
public void setmLog(RecyclerView log){
mLog =log;
TextView tvTitle =(TextView)findViewById(R.id.title);
TextView tvDescription=(TextView)findViewById(R.id.txtDescription);
tvDescription.setText(mLog.getContentDescription()+"");
}
}
Step(6)-Create a new row.xml layout .
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent"
android:padding="3dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Large Text"
android:id="@+id/title"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Small Text"
android:padding="2dp"
android:id="@+id/desc"
android:layout_below="@+id/title"
android:layout_alignParentStart="true" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imageView"
android:padding="2dp"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imageView2"
android:padding="3dp"
android:layout_below="@+id/desc"
android:layout_alignParentEnd="true" />
</RelativeLayout>
Step(7)-MainActivity ..
package com.tiwari.rajshekhar.recyclerviewdemo;
import android.app.Activity;
import android.content.Intent;
import android.media.Image;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import java.util.ArrayList;
public class MainActivity extends Activity {
private RecyclerView mRecyclerView;
private RecyclerView.Adapter mAdapter;
private RecyclerView.LayoutManager mLayoutManager;
RecyclerView my_recycler_view;
Button btnAddItem;
ListView lvList;
ArrayList< MyPojo> myList = new ArrayList< MyPojo>();
MyAdapter listAdapter;
EditText etTitle, etDescription;
String desc="";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);
// use this setting to improve performance if you know that changes
// in content do not change the layout size of the RecyclerView
mRecyclerView.setHasFixedSize(true);
// use a linear layout manager
mLayoutManager = new LinearLayoutManager(this);
mRecyclerView.setLayoutManager(mLayoutManager);
ArrayList<MyPojo> pojos =new ArrayList<MyPojo>();
for (int i=0;i<20;i++){
pojos.add(new MyPojo("RAJ007"+i,"Evon-tec",
R.drawable.img1));
}
mAdapter = new MyAdapter(pojos);
mRecyclerView.setAdapter(mAdapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
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