In this tutorial we will make youtube app, that can play our video and playlist video.
Open Android Studio and create a new project with empty activity.
Now download Youtube Android Player API, and then extract the downloaded compressed folder, and add to the libs folder in android studio.
Add dependencies to build.gradle file and sync.
implementation files('libs/YouTubeAndroidPlayerApi.jar')
You need to add Google API Key. ( if you can not do , pls follow the video.)
you need to add Video ID and
Playlist ID also. 
AndroidManifest.xml
Add internet permission.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.dammang.youtubeapp">
<uses-permission android:name="android.permission.INTERNET"/>
<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>Add this youtube player view in
activity_main.xml
<?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"
android:orientation="vertical"
tools:context=".MainActivity">
<com.google.android.youtube.player.YouTubePlayerView
android:id="@+id/youtube_player"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/white">
</com.google.android.youtube.player.YouTubePlayerView>
<Button
android:id="@+id/btnPlist"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="playlist"/>
<TextView
android:textColor="@color/colorPrimaryDark"
android:layout_marginTop="40dp"
android:textSize="35sp"
android:layout_gravity="center"
android:gravity="center"
android:textStyle="bold"
android:text="Youtube App\n tutorial"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>MainActivity.java
package com.dammang.youtubeapp;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import com.google.android.youtube.player.YouTubeBaseActivity;
import com.google.android.youtube.player.YouTubeInitializationResult;
import com.google.android.youtube.player.YouTubePlayer;
import com.google.android.youtube.player.YouTubePlayerView;
import java.util.PrimitiveIterator;
public class MainActivity extends YouTubeBaseActivity implements YouTubePlayer.OnInitializedListener {
private String GOOGLE_API_KEY = "Your Google Api Key";
private String YOUTUBE_VIDEO_ID = "zGED0LioCHo";
private String YOUTUBE_PLAYLIST_ID= "PLlwJ5OBv7YUjmA5dKBOVeXFjjca940qMc";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
YouTubePlayerView youTubePlayerView = (YouTubePlayerView) findViewById(R.id.youtube_player);
youTubePlayerView.initialize(GOOGLE_API_KEY, this);
Button button = (Button)findViewById(R.id.btnPlist);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = YouTubeStandalonePlayer.createPlaylistIntent(MainActivity.this,GOOGLE_API_KEY,YOUTUBE_PLAYLIST_ID);
startActivity(intent);
}
});
}
@Override
public void onInitializationSuccess(YouTubePlayer.Provider provider, YouTubePlayer youTubePlayer, boolean b) {
youTubePlayer.setPlayerStateChangeListener(playerStateChangeListener);
youTubePlayer.setPlaybackEventListener(playbackEventListener);
if(!b) {
youTubePlayer.cueVideo(YOUTUBE_VIDEO_ID);
}
}
private YouTubePlayer.PlaybackEventListener playbackEventListener = new YouTubePlayer.PlaybackEventListener() {
@Override
public void onPlaying() {
}
@Override
public void onPaused() {
}
@Override
public void onStopped() {
}
@Override
public void onBuffering(boolean b) {
}
@Override
public void onSeekTo(int i) {
}
};
private YouTubePlayer.PlayerStateChangeListener playerStateChangeListener = new YouTubePlayer.PlayerStateChangeListener() {
@Override
public void onLoading() {
}
@Override
public void onLoaded(String s) {
}
@Override
public void onAdStarted() {
}
@Override
public void onVideoStarted() {
}
@Override
public void onVideoEnded() {
}
@Override
public void onError(YouTubePlayer.ErrorReason errorReason) {
}
};
@Override
public void onInitializationFailure(YouTubePlayer.Provider provider, YouTubeInitializationResult youTubeInitializationResult) {
}
}
Now Run your App.
Finish. good luck.
