Adding OpenTV components

Add device calibration profiles

To ensure good playback quality, this limits the bitrate depending on the hardware on which the player is running.

1. Right-click the app folder and select New > Directory. In the New Directory window, enter the directory name assets and click OK.
2. Right-click the assets folder and select New > File. In the New File window, enter the file name profiles.json and click OK. In the new profiles.json file, enter the following:

    {
       "DeviceProfiles": {
           "Specific": [
               {
                   "Manufacturer": "",
                   "Model": "",
                   "Product": "",
                   "Device": "",
                   "Board": "",
                   "Hardware": "",
                   "Decoder": "",
                   "MaxBitRate": ""
              }
          ],
          "Generic": [
              {
                   "CpuCores": "1",
                   "CpuFreq": "600000",
                   "Neon": "0",
                   "MaxBitRate": "300000"
              }
          ]
   }

For more information, see Device Profiles.

Add a video view

1. Select app > src > main > res > layout and open the content_main.xml file.

2. Select the Text view window, and create a nagra.nmp.sdk.NMPVideoView by adding the following before the closing tag.

   JAVA

         <nagra.nmp.sdk.NMPVideoView
          android:id="@+id/nmpVideoView"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:layout_centerInParent="true"
          android:descendantFocusability="afterDescendants" />

3. Select app > src > main > res > values and add the following line to the strings.xml file.

   JAVA

   <string name="hello_world">Hello world!</string>

Editing the MainActivity.java file

This adds the minimum amount of code to enable playback of a single clear stream (identified by a hard-coded string) as soon as the app starts.

1. Select app > src > main > java > [filename], open the MainActivity.java file and add the following import lines.

   JAVA

      import nagra.nmp.sdk.NMPVideoView;
      import nagra.nmp.sdk.NMPSDK;

2. Add the following member variables after the opening brace of the MainActivity class. This example uses a NASA TV clear stream; you can change this to a clear stream of your choice.

   JAVA

      static final String TAG = "MainActivity";
      private NMPVideoView mNMPVideoView = null;
      private int mPausePos = 0;
      private String mVideoURI = "http://nasatv-lh.akamaihd.net/i/NASA_101@319270/master.m3u8";

3. Delete the existing contents of the onCreate method, and add the following instead. This sets a reference to the video view and loads the OpenTV Player SDK.

   JAVA

      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      mNMPVideoView = (NMPVideoView) findViewById(R.id.nmpVideoView);
      // It is necessary to load sdk library first before using sdk
      NMPSDK.load(getApplicationContext());

4. Add the following to set the Android onStart method, set the stream and start it.

   JAVA

      @Override
      public void onStart()
      {
          super.onStart();
          mNMPVideoView.setVideoPath(mVideoURI);
          mNMPVideoView.start();
      }

5. Add the following to set the Android onPause method to save the current position and pause the playback.

   JAVA

      @Override
      public void onPause()
      {
          super.onPause();
          if(mNMPVideoView != null)
          {
              mPausePos = mNMPVideoView.getCurrentPosition();
              mNMPVideoView.pause();
          }
      }

6. Add the following to set the Android onResume method to seek to the paused position and start playback.

   JAVA

      @Override
      public void onResume()
      {
          super.onResume();
         if(mNMPVideoView != null && mPausePos > 0)
          {
              mNMPVideoView.seekTo(mPausePos);
              mPausePos = 0;
          }
      }

For more information, see Playback of clear content.

Next step: You should now be able to run the app in clear playback mode.