Android
Youtube-API

Osservazioni

Avvio di StandAlonePlayerActivity

1. Avvia attività di player standalone

        Intent standAlonePlayerIntent = YouTubeStandalonePlayer.createVideoIntent((Activity) context,
                Config.YOUTUBE_API_KEY, // which you have created in step 3
                videoId, // video which is to be played
                100,     //The time, in milliseconds, where playback should start in the video
                true,    //autoplay or not
                false);   //lightbox mode or not; false will show in fullscreen
        context.startActivity(standAlonePlayerIntent);
   

Attività che estende YouTubeBaseActivity

public class CustomYouTubeActivity extends YouTubeBaseActivity implements YouTubePlayer.OnInitializedListener, YouTubePlayer.PlayerStateChangeListener {

    private YouTubePlayerView mPlayerView;
    private YouTubePlayer mYouTubePlayer;
    private String mVideoId = "B08iLAtS3AQ";
    private String mApiKey;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mApiKey = Config.YOUTUBE_API_KEY;
        mPlayerView = new YouTubePlayerView(this);
        mPlayerView.initialize(mApiKey, this); // setting up OnInitializedListener
        addContentView(mPlayerView, new LayoutParams(LayoutParams.MATCH_PARENT,
                LayoutParams.MATCH_PARENT)); //show it in full screen
    }

    //Called when initialization of the player succeeds.
    @Override
    public void onInitializationSuccess(YouTubePlayer.Provider provider,
                                        YouTubePlayer player,
                                        boolean wasRestored) {

        player.setPlayerStateChangeListener(this); // setting up the player state change listener
        this.mYouTubePlayer = player;
        if (!wasRestored)
            player.cueVideo(mVideoId);
    }

        @Override
    public void onInitializationFailure(YouTubePlayer.Provider provider,
                                        YouTubeInitializationResult errorReason) {

        Toast.makeText(this, "Error While initializing", Toast.LENGTH_LONG).show();
    }

    @Override
    public void onAdStarted() {
    }

    @Override
    public void onLoaded(String videoId) { //video has been loaded
        if(!TextUtils.isEmpty(mVideoId) && !this.isFinishing() && mYouTubePlayer != null)
            mYouTubePlayer.play(); // if we dont call play then video will not auto play, but user still has the option to play via play button
    }

    @Override
    public void onLoading() {
    }

    @Override
    public void onVideoEnded() {
    }

    @Override
    public void onVideoStarted() {

    }

    @Override
    public void onError(ErrorReason reason) {
        Log.e("onError", "onError : " + reason.name());
    }

}

YoutubePlayerFragment in portrait Activty

Il codice seguente implementa un semplice YoutubePlayerFragment. Il layout dell'attività è bloccato in modalità verticale e quando l'orientamento cambia o l'utente fa clic su schermo intero su YoutubePlayer si trasforma in lansscape con il pop-up di YouTube che riempie lo schermo. YoutubePlayerFragment non ha bisogno di estendere un'attività fornita dalla libreria di Youtube. È necessario implementare YouTubePlayer.OnInitializedListener per poter inizializzare il programma YouTubePlayer. Quindi la classe della nostra attività è la seguente

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.Toast;

import com.google.android.youtube.player.YouTubeInitializationResult;
import com.google.android.youtube.player.YouTubePlayer;
import com.google.android.youtube.player.YouTubePlayerFragment;

public class MainActivity extends AppCompatActivity implements YouTubePlayer.OnInitializedListener {
   
    public static final String API_KEY ;
    public static final String VIDEO_ID = "B08iLAtS3AQ";

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

        YouTubePlayerFragment youTubePlayerFragment = (YouTubePlayerFragment) getFragmentManager()
                .findFragmentById(R.id.youtubeplayerfragment);

        youTubePlayerFragment.initialize(API_KEY, this);

    }

    /**
     *
     * @param provider The provider which was used to initialize the YouTubePlayer
     * @param youTubePlayer A YouTubePlayer which can be used to control video playback in the provider.
     * @param wasRestored Whether the player was restored from a previously saved state, as part of the YouTubePlayerView
     *                    or YouTubePlayerFragment restoring its state. true usually means playback is resuming from where
     *                    the user expects it would, and that a new video should not be loaded
     */
    @Override
    public void onInitializationSuccess(YouTubePlayer.Provider provider, YouTubePlayer youTubePlayer, boolean wasRestored) {
                 
youTubePlayer.setFullscreenControlFlags(YouTubePlayer.FULLSCREEN_FLAG_CONTROL_ORIENTATION |
                    YouTubePlayer.FULLSCREEN_FLAG_ALWAYS_FULLSCREEN_IN_LANDSCAPE);


        if(!wasRestored) {
            youTubePlayer.cueVideo(VIDEO_ID);
        }
    }

    /**
     *
     * @param provider The provider which failed to initialize a YouTubePlayer.
     * @param error The reason for this failure, along with potential resolutions to this failure.
     */
    @Override
    public void onInitializationFailure(YouTubePlayer.Provider provider, YouTubeInitializationResult error) {
        
        final int REQUEST_CODE = 1;

        if(error.isUserRecoverableError()) {
            error.getErrorDialog(this,REQUEST_CODE).show();
        } else {
            String errorMessage = String.format("There was an error initializing the YoutubePlayer (%1$s)", error.toString());
            Toast.makeText(this, errorMessage, Toast.LENGTH_LONG).show();
        }
    }
}

Un YoutubePlayerFragment può essere aggiunto al layout xaml dell'attività come seguito

<LinearLayout 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:orientation="vertical"
              android:paddingBottom="@dimen/activity_vertical_margin"
              android:paddingLeft="@dimen/activity_horizontal_margin"
              android:paddingRight="@dimen/activity_horizontal_margin"
              android:paddingTop="@dimen/activity_vertical_margin"
              tools:context=".MainActivity">

    <fragment
        android:id="@+id/youtubeplayerfragment"
        android:name="com.google.android.youtube.player.YouTubePlayerFragment"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>


    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">


            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal"
                android:layout_marginTop="20dp"
                android:text="This is a YoutubePlayerFragment example"
                android:textStyle="bold"/>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"

                android:layout_gravity="center_horizontal"
                android:layout_marginTop="20dp"
                android:text="This is a YoutubePlayerFragment example"
                android:textStyle="bold"/>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal"
                android:layout_marginTop="20dp"
                android:text="This is a YoutubePlayerFragment example"
                android:textStyle="bold"/>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal"
                android:layout_marginTop="20dp"
                android:text="This is a YoutubePlayerFragment example"
                android:textStyle="bold"/>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal"
                android:layout_marginTop="20dp"
                android:text="This is a YoutubePlayerFragment example"
                android:textStyle="bold"/>
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal"
                android:layout_marginTop="20dp"
                android:text="This is a YoutubePlayerFragment example"
                android:textStyle="bold"/>
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal"
                android:layout_marginTop="20dp"
                android:text="This is a YoutubePlayerFragment example"
                android:textStyle="bold"/>

        </LinearLayout>
    </ScrollView>

</LinearLayout>

Infine, è necessario aggiungere i seguenti attributi nel file Manifest all'interno del tag dell'attività

android:configChanges="keyboardHidden|orientation|screenSize"
android:screenOrientation="portrait"

YouTube Player API

Ottenere la chiave API Android:

Per prima cosa è necessario ottenere l'impronta digitale SHA-1 sulla macchina utilizzando il comando java keytool. Esegui il comando sottostante in cmd / terminale per ottenere l'impronta digitale SHA-1.

keytool -list -v -keystore ~/.android/debug.keystore -alias androiddebugkey -storepass android -keypass android

MainActivity.java

public class Activity extends YouTubeBaseActivity implements YouTubePlayer.OnInitializedListener {

    private static final int RECOVERY_DIALOG_REQUEST = 1;

    // YouTube player view
    private YouTubePlayerView youTubeView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);

        setContentView(R.layout.activity_main);

        youTubeView = (YouTubePlayerView) findViewById(R.id.youtube_view);

        // Initializing video player with developer key
        youTubeView.initialize(Config.DEVELOPER_KEY, this);

    }

    @Override
    public void onInitializationFailure(YouTubePlayer.Provider provider,
                                        YouTubeInitializationResult errorReason) {
        if (errorReason.isUserRecoverableError()) {
            errorReason.getErrorDialog(this, RECOVERY_DIALOG_REQUEST).show();
        } else {
            String errorMessage = String.format(
                    getString(R.string.error_player), errorReason.toString());
            Toast.makeText(this, errorMessage, Toast.LENGTH_LONG).show();
        }
    }

    @Override
    public void onInitializationSuccess(YouTubePlayer.Provider provider,
                                        YouTubePlayer player, boolean wasRestored) {
        if (!wasRestored) {

            // loadVideo() will auto play video
            // Use cueVideo() method, if you don't want to play it automatically
            player.loadVideo(Config.YOUTUBE_VIDEO_CODE);

            // Hiding player controls
            player.setPlayerStyle(YouTubePlayer.PlayerStyle.CHROMELESS);
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == RECOVERY_DIALOG_REQUEST) {
            // Retry initialization if user performed a recovery action
            getYouTubePlayerProvider().initialize(Config.DEVELOPER_KEY, this);
        }
    }

    private YouTubePlayer.Provider getYouTubePlayerProvider() {
        return (YouTubePlayerView) findViewById(R.id.youtube_view);
    }    
}

Ora crea il file Config.java . Questo file contiene la chiave sviluppatore dell'API di Google Console e l'ID video di YouTube

Config.java

public class Config {

    // Developer key
    public static final String DEVELOPER_KEY = "AIzaSyDZtE10od_hXM5aXYEh6Zn7c6brV9ZjKuk";

    // YouTube video id
    public static final String YOUTUBE_VIDEO_CODE = "_oEA18Y8gM0";
}

file xml

<com.google.android.youtube.player.YouTubePlayerView
                android:id="@+id/youtube_view"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="30dp" />

Consumo dell'API dati di YouTube su Android

Questo esempio ti guiderà su come ottenere i dati della playlist utilizzando l'API dei dati di YouTube su Android.

Impronta digitale SHA-1

Per prima cosa devi ottenere un'impronta digitale SHA-1 per la tua macchina. Esistono vari metodi per recuperarlo. Puoi scegliere qualsiasi metodo fornito in questo Q & A.

Console dell'API di Google e chiave YouTube per Android

Ora che hai un'impronta digitale SHA-1, apri la console dell'API di Google e crea un progetto. Vai a questa pagina e crea un progetto usando quel tasto SHA-1 e abilita l'API dei dati di YouTube. Ora otterrai una chiave. Questa chiave verrà utilizzata per inviare richieste da Android e recuperare i dati.

Gradle part

Dovrai aggiungere le seguenti righe al tuo file Gradle per l'API dei dati di YouTube:

compile 'com.google.apis:google-api-services-youtube:v3-rev183-1.22.0'

Per poter utilizzare il client nativo di YouTube per inviare richieste, dobbiamo aggiungere le seguenti righe in Gradle:

compile 'com.google.http-client:google-http-client-android:+'
compile 'com.google.api-client:google-api-client-android:+'
compile 'com.google.api-client:google-api-client-gson:+'

La seguente configurazione deve essere aggiunta in Gradle per evitare conflitti:

configurations.all {
    resolutionStrategy.force 'com.google.code.findbugs:jsr305:3.0.2'
} 

Di seguito viene mostrato come apparirà finalmente gradle.build .

build.gradle

apply plugin: 'com.android.application'
android {
    compileSdkVersion 25
    buildToolsVersion "25.0.2"
    defaultConfig {
        applicationId "com.aam.skillschool"
        minSdkVersion 19
        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'
        }
    }
    configurations.all {
        resolutionStrategy.force 'com.google.code.findbugs:jsr305:3.0.2'
    }
}

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.google.apis:google-api-services-youtube:v3-rev183-1.22.0'
    compile 'com.android.support:appcompat-v7:25.3.1'
    compile 'com.android.support:support-v4:25.3.1'
    compile 'com.google.http-client:google-http-client-android:+'
    compile 'com.google.api-client:google-api-client-android:+'
    compile 'com.google.api-client:google-api-client-gson:+'
}

Ora arriva la parte di Java. Poiché utilizzeremo HttpTransport per il networking e GsonFactory per convertire JSON in POJO, non abbiamo bisogno di altre librerie per inviare richieste.

Ora voglio mostrare come ottenere playlist tramite l'API di YouTube fornendo gli ID della playlist. Per questa attività userò AsyncTask . Per capire come richiediamo i parametri e per comprendere il flusso, consulta l' API dei dati di YouTube .

public class GetPlaylistDataAsyncTask extends AsyncTask<String[], Void, PlaylistListResponse> {
    private static final String YOUTUBE_PLAYLIST_PART = "snippet";
    private static final String YOUTUBE_PLAYLIST_FIELDS = "items(id,snippet(title))";

    private YouTube mYouTubeDataApi;

    public GetPlaylistDataAsyncTask(YouTube api) {
        mYouTubeDataApi = api;
    }

    @Override
    protected PlaylistListResponse doInBackground(String[]... params) {

        final String[] playlistIds = params[0];

        PlaylistListResponse playlistListResponse;
        try {
            playlistListResponse = mYouTubeDataApi.playlists()
                    .list(YOUTUBE_PLAYLIST_PART)
                    .setId(TextUtils.join(",", playlistIds))
                    .setFields(YOUTUBE_PLAYLIST_FIELDS)
                    .setKey(AppConstants.YOUTUBE_KEY) //Here you will have to provide the keys
                    .execute();
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }

        return playlistListResponse;
    }
}

L'attività asincrona sopra riportata restituirà un'istanza di PlaylistListResponse che è una classe build-in di YouTube SDK. Ha tutti i campi richiesti, quindi non dobbiamo creare noi stessi POJO.

Infine, nel nostro MainActivity dovremo fare quanto segue:

public class MainActivity extends AppCompatActivity {
    private YouTube mYoutubeDataApi;
    private final GsonFactory mJsonFactory = new GsonFactory();
    private final HttpTransport mTransport = AndroidHttp.newCompatibleTransport();
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_review);
        mYoutubeDataApi = new YouTube.Builder(mTransport, mJsonFactory, null)
                .setApplicationName(getResources().getString(R.string.app_name))
                .build();
        String[] ids = {"some playlists ids here seperated by "," };
        new GetPlaylistDataAsyncTask(mYoutubeDataApi) {
            ProgressDialog progressDialog = new ProgressDialog(getActivity());

            @Override
            protected void onPreExecute() {
                progressDialog.setTitle("Please wait.....");
                progressDialog.show();
                super.onPreExecute();
            }

            @Override
            protected void onPostExecute(PlaylistListResponse playlistListResponse) {
                super.onPostExecute(playlistListResponse);
                //Here we get the playlist data
                progressDialog.dismiss();
                Log.d(TAG, playlistListResponse.toString());
            }
        }.execute(ids);
    }
}