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Getting started with the Android SDK

This guide will provide a end-to-end explanation of how to setup an Android application with THEOplayer included. It will cover setting up an IDE, including all dependencies, adding THEOplayer to your activity and interacting with the API.

You can follow the guide step-by-step, or for each step you will find a link to the corresponding commit in our Android Github repository. We also provide a full project for Android TV and for both together.

Prerequisites

  1. Download and install Android Studio
  2. Obtain a THEOplayer Android / Android TV SDK license. If you don't have a license yet, contact your sales contact or email us at support@theoplayer.com.

Setup a starter project (source)

Start with opening Android Studio. You will be greeted with the following screen. To begin, choose the "Start a new Android Studio project" option. 

android getting started 01

On the next screen we can choose from pre-built Activities.
An Activity is a screen of the application, it provides the window in which the app draws its UI. Because we want to show our THEOplayer on the Activity, we will select an empty one.

So select "Empty Activity" and press "Next". 

android getting started 02

THEOplayer supports Android devices with Android version 4.1 (Jelly Bean - API 16) so select your minimum SDK requirement (Only the phone and tablet option).

Choose your application name, domain and project location, then hit "Next".

Note the Package name as we will need this path later.

android getting started 03

We are now done with the setup of the new project. Android Studio will now download the dependencies, project requirements and index your files. You can see the progress at the bottom of the window.

Once this is done you will see the following screen:

android getting started 04

Project structure

By default, Android Studio displays your project files in the Android view. This view does not reflect the actual file hierarchy on the disk. The view is organized by modules and file types to simplify navigation between key source files of your project and to hide certain files or directories that are not commonly used.

To see the actual file structure of the project, including all files hidden from the Android view, select Project from the dropdown at the top of the Project window.

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When you select Project view, you can see a lot more files and directories. The most important of which are the following:

android getting started 06

  • app/

    • Contains all module files: 
    • build/

      • Contains build outputs
    • libs/

      • Contains private libraries
    • src/

      • Contains all code and resource files for the module in the following subdirectories:
      • src/androidTest/

        • Contains code for instrumentation tests that run on an Android device. For more information, see the Android Test documentation.
      • src/main/

        • Contains the "main" sourceset files: the Android code and resources shared by all build variants
      • src/main/java/

        • Contains Java source code files, seperated by package names.
      • src/main/res/

        • Contains all non-code resources, such as XML layouts, UI strings, and bitmap images, divided into corresponding sub-directories. For more information about all possible resource types, see Providing Resources.
      • src/main/AndroidManifest.xml

        • Describes the nature of the application and each of its components. For more information, see the AndroidManifest.xml documentation.
    • build.gradle(module)

      • Shows all the project's build-related configuration files
  • build.gradle (project)

    • This defines your build configuration that apply to all modules

Add THEOplayer library to your application (source)

Your THEOplayer Android contains the following files:

  • theoplayer-android-xxx-VERSION-minapi21-release.aar

    • Supports all mobile and TV devices starting with Lollipop (5.0)
  • theoplayer-android-xxx-VERSION-minapi16-release.aar

    • Supports all mobile devices starting with Android Jellybean (4.1)
  • theoplayer-android-xxx-VERSION-javadoc.jar

    • Contains the API documentation for the library
  • theoplayer-android-xxx-VERSION-sources.aar

    • Contains the source code of the exposed API of THEOplayer Android SDK

About the file extensions:

  • A JAR is a package file format typically used to aggregate many Java class files and associated metadata and resources into one file for distribution.
  • Android Archive (AAR) files, unlike JAR files, can contain Android resources and a manifest file, which allows you to bundle in shared resources like layouts and drawables in addition to Java classes and methods. Usually Android Library projects are compiled to AAR file for distribution.
  • Android Package (APK) is the package file format used by the Android operating system for distribution and installation of mobile apps. (Your application containing THEOplayer will compile to an APK file) 

With the minApi16 version, you can support the largest possible amount of devices. However, the file size of this version is about 50MB while the minApi21 version is around 2MB. For that reason, it is useful to use both in a way so that the users who have Android Lollipop or higher will have a much smaller APK file. 

We will demonstrate the steps with the minApi16 version, but they are the same for the minApi21 version. 

First add your THEOplayer minApi16 AAR file to "app/libs" folder (in our example project we call it theoplayer.aar)

android getting started 06 5

Now we have to modify the build.gradle files to load "theoplayer.aar" library.

android getting started 07

In your top-level (project) build.gradle file add the following lines to allow loading library files from the "libs" folder

allprojects {
    repositories {
        google()
        jcenter()

        flatDir {
            dirs 'libs'
        }

    }
}

And your Gradle file now looks like this:

android getting started 08

Next we need to edit the Gradle file on the module-level("app/build.gradle")

android getting started 09

we need to specify for Gradle to load and compile our library from the libs folder.
THEOplayer SDK has an external dependency on Gson from Google. We use this library to convert Java object to and from JSON representation.

In the Gradle file, edit the dependencies to:

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

    implementation(name:'theoplayer', ext:'aar')
    implementation 'com.google.code.gson:gson:2.8.2'

    implementation 'androidx.appcompat:appcompat:1.2.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.1'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
}

android getting started 10

After the modification of the .gradle files, Android Studio asks you to sync with Gradle. Do so by pressing the "Sync Now" button on the top right of the window. (in the blue border)

Add THEOplayer view to your application (source)

To play online videos with THEOplayer, first we need to add INTERNET permission into the AndroidManifest.xml file ("app/src/main/AndroidManifest.xml"):

android getting started 11

<uses-permission android:name="android.permission.INTERNET" />

The manifest should look like:

android getting started 12

We will add some code to the activity_main.xml file.

android getting started 13

We can now add the THEOplayerView to the layout of the MainActivity ("/app/src/main/java/com/theoplayer/theoplayerexample/MainActivity.java").
The example "Hello World!" text can be completely removed. We put the THEOplayerView instead.

At least the "width", "height" and "id" attributes need to be specified on the new view.

The "id" is important, it is used to identify the view object in you MainActivity class.

<com.theoplayer.android.api.THEOplayerView
        android:layout_width="match_parent"
        android:layout_height="300dp"
        android:id="@+id/theoplayer"
        app:layout_constraintTop_toTopOf="parent">

    </com.theoplayer.android.api.THEOplayerView>

android getting started 14

Use THEOplayer API in your application

Now in the MainActivity.java we can retrieve the THEOplayerView by the "id" we set earlier using the findViewById method.

1. Create THEOplayer instance

    ...
    import com.theoplayer.android.api.THEOplayerView;
    
    public class MainActivity extends AppCompatActivity{
        THEOplayerView theoPlayerView;

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

            theoPlayerView = findViewById(R.id.theoplayer);
    
        }
    }

2. Configure source (source)

To play a video in THEOplayer, we need to configure a source for the player in our MainActivity:

        TypedSource typedSource = TypedSource.Builder
                .typedSource()
                .src("https://cdn.theoplayer.com/video/dash/big_buck_bunny/BigBuckBunny_10s_simple_2014_05_09.mpd")
                .type(SourceType.DASH)
                .build();

        SourceDescription sourceDescription = SourceDescription.Builder
                .sourceDescription(typedSource)
                .build();

        theoPlayerView.getPlayer().setSource(sourceDescription);

android getting started 15

3. Control THEOplayer through the API (source)

We will now introduce a button to start/stop the video in the player.

First add the button to our activity_main.xml layout file

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btn_playpause"
        android:text="PLAY/PAUSE"
        app:layout_constraintTop_toBottomOf="@+id/theoplayer"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"/>

android getting started 16

Navigate to the MainActivity.java file and import the android button functionality.

    import android.widget.Button;
    import android.view.View;

Then set an OnClickListener() on the button in our MainActivity code to trigger play and pause in the player.

Button btnPlayPause;

        ...

        btnPlayPause = findViewById(R.id.btn_playpause);
        btnPlayPause.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (theoPlayerView.getPlayer().isPaused()) {
                    theoPlayerView.getPlayer().play();
                } else {
                    theoPlayerView.getPlayer().pause();
                }
            }
        });

android getting started 17

 4. Listen for THEOplayer events (source)

The next step is listening for player events.

First, we need to create two more TextViews in the activity_main.xml file.

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/txt_playstatus"
        app:layout_constraintLeft_toRightOf="@+id/btn_playpause"
        app:layout_constraintTop_toBottomOf="@+id/theoplayer"
        app:layout_constraintBaseline_toBaselineOf="@+id/btn_playpause"
        android:layout_marginLeft="20dp"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/txt_timeupdate"
        app:layout_constraintLeft_toRightOf="@+id/txt_playstatus"
        app:layout_constraintTop_toBottomOf="@+id/theoplayer"
        app:layout_constraintBaseline_toBaselineOf="@+id/btn_playpause"
        android:layout_marginLeft="20dp"/>

Then import the following Android and THEOplayer libraries in the MainActivity file:

    ...
    import android.widget.TextView;
    ...
    import com.theoplayer.android.api.event.player.PauseEvent;
    import com.theoplayer.android.api.event.EventListener;
    import com.theoplayer.android.api.event.player.PlayEvent;
    import com.theoplayer.android.api.event.player.PlayerEventTypes;
    import com.theoplayer.android.api.event.player.TimeUpdateEvent;

android getting started 18

We will now listen for "PLAY", "PAUSE" and "TIMEUPDATE" in this example.

TextView txtPlayStatus, txtTimeUpdate;

        ...

        txtPlayStatus = findViewById(R.id.txt_playstatus);
        txtTimeUpdate = findViewById(R.id.txt_timeupdate);

        theoPlayerView.getPlayer().addEventListener(PlayerEventTypes.PLAY, new EventListener<PlayEvent>() {
            @Override
            public void handleEvent(PlayEvent playEvent) {
                txtPlayStatus.setText("Playing");
            }
        });

        theoPlayerView.getPlayer().addEventListener(PlayerEventTypes.PAUSE, new EventListener<PauseEvent>() {
            @Override
            public void handleEvent(PauseEvent pauseEvent) {
                txtPlayStatus.setText("Paused");
            }
        });

        theoPlayerView.getPlayer().addEventListener(PlayerEventTypes.TIMEUPDATE, new EventListener<TimeUpdateEvent>() {
            @Override
            public void handleEvent(TimeUpdateEvent timeUpdateEvent) {
                txtTimeUpdate.setText(String.valueOf(timeUpdateEvent.getCurrentTime()));
            }
        });

android getting started 19

When the events are triggered we will update the MainActivity UI with the corresponding state.

<Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btn_playpause"
        android:text="PLAY/PAUSE"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/theoplayer"/>
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/txt_playstatus"
        app:layout_constraintRight_toRightOf="@+id/btn_playpause"
        app:layout_constraintTop_toBottomOf="@+id/theoplayer"
        app:layout_constraintBaseline_toBaselineOf="@+id/btn_playpause"
        android:layout_marginLeft="20dp"/>
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/txt_timeupdate"
        app:layout_constraintLeft_toRightOf="@+id/txt_playstatus"
        app:layout_constraintTop_toBottomOf="@+id/theoplayer"
        app:layout_constraintBaseline_toBaselineOf="@+id/btn_playpause"
        android:layout_marginLeft="20dp"/>

        </androidx.constraintlayout.widget.ConstraintLayout>

5. Play fullscreen video in landscape mode(source)

THEOplayer SDK contains a default fullscreen activity which can be started automatically when you rotate your device.

We have to configure our player instance in the MainActivity to react to orientation changes and start the Fullscreen activity.

   @Override
    protected void onCreate(Bundle savedInstanceState) {

        // ...

        theoPlayerView = findViewById(R.id.theoplayer);
        theoPlayerView.getSettings().setFullScreenOrientationCoupled(true);

        // ...

    }

In the AndroidManifest.xml we can disable the default orientation behaviour on our MainActivity and lock it in portrait.
Then, because we enabled fullscreen orientation coupling with the setFullScreenOrientationCoupled(true) method eariler, THEOplayer will take care of the support of seamless landscape activity transition at rotation.

        <activity android:name=".MainActivity"
            android:screenOrientation="userPortrait"
            android:configChanges="orientation|screenSize"
            >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

android getting started 20

In order to work properly and in sync with the Activity lifecycle changes (e.g. when we rotate the device or start a new Activity or the app goes to background). We need to call the "onResume", "onPause" and "onDestroy" methods of the THEOplayerView when the matching methods are called in the Activity.

public class MainActivity extends AppCompatActivity{

    // ...

    @Override
    protected void onPause() {
        super.onPause();
        theoPlayerView.onPause();
    }

    @Override
    protected void onResume() {
        super.onResume();
        theoPlayerView.onResume();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        theoPlayerView.onDestroy();
    }

    // ...

}  

android getting started 22

If you would like to customize the Fullscreen Activity, you can follow our tutorial here.

Run your application

To run your application, you have to click on the green "Play" icon next to the "app" module on the Toolbar of Android Studio.

Then you have two choices:

  • connect your device via usb to your computer
  • run the application in an emulator

We suggest you to run the application on a real device for the best performance.

You can either plug in a usb cable between your device and your computer, or enable network debugging on your device and connect using adb connect IP-ADDRESS.

Also keep in mind, on emulators which run Android 7.0 and above the video in THEOplayer is not showing. If you want to still test in emulators you need to use a version with Android 6.0 or below.

And finally, here you have some screenshots from the running application:

screenshot 1524665161199

Start screen

screenshot 1524665170079

Playing screen

screenshot 1524665175584

Paused screen

screenshot 1524665185023

Rotated fullscreen

Summary

In this guide we have focused on creating an Android application from scratch and we integrated it with THEOplayer.

We have learned how to interact with the player via the available APIs in Java, we have registered for player events and we have learned how to enable automatic orientation detection.

You can find much more interesting features of THEOplayer on our demo page.

The full source of this application is available on GitHub.

In case you encountered any problems, please contact us at support@theoplayer.com!

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