Question

在Exoplayer中播放视频时，效果很好，但在旋转时，视频又重新开始播放。我想确保当视频旋转时，视频恢复到相同位置我已经保存了玩家当前的位置，但是仍然无法正常工作。请帮忙.....

public class RecipeStepDescriptionFragment extends Fragment {


    @BindView(R.id.playerView)
    PlayerView playerView;

    @BindView(R.id.stepDescription)
    TextView stepDescription;

    @BindView(R.id.ingredientsCardSteps)
    CardView ingredientsCardSteps;

    @BindView(R.id.ingredientsListStepDescription)
    TextView ingredientsListStepDescription;


    @BindView(R.id.widgetButtonStepDescription)
    FloatingActionButton widgetButton;


    private SimpleExoPlayer player;

    private static final String TAG = "StepDetail";


    String videoUrl;
    String longDescription;
    boolean tablet;
    String ingredients;
    String name;

    public RecipeStepDescriptionFragment() {
        // Required empty public constructor
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View rootView = inflater.inflate(R.layout.fragment_recipe_step_description, container, false);
        ButterKnife.bind(this, rootView);





        if (getArguments() != null) {
            videoUrl = getArguments().getString("videoURL");
            longDescription = getArguments().getString("description");
            tablet = getArguments().getBoolean("tablet");
            ingredients = getArguments().getString("ingredients");
            name = getArguments().getString("name");
        //recipeList = (List<Steps>) getArguments().getSerializable("recipe_steps");*/
        }
        stepDescription.setText(longDescription);
        if (!tablet) {
            ingredientsCardSteps.setVisibility(View.GONE);
        } else {
            ingredientsListStepDescription.setText(ingredients);
        }
        if (videoUrl != null) {
            playerView.setVisibility(View.VISIBLE);
            if (videoUrl.equals("")) {
                playerView.setVisibility(View.GONE);
            } else {
                player = ExoPlayerFactory.newSimpleInstance(getContext(), new DefaultTrackSelector());
                playerView.setPlayer(player);
                DefaultDataSourceFactory dataSourceFactory = new DefaultDataSourceFactory(getContext(), Util.getUserAgent(getContext(), "exo-demo"));
                ExtractorMediaSource mediaSource = new ExtractorMediaSource.Factory(dataSourceFactory).createMediaSource(Uri.parse(videoUrl));
                player.prepare(mediaSource);
                player.setPlayWhenReady(true);

            }


        } else {
            playerView.setVisibility(View.GONE);

        }

        if (savedInstanceState != null && player != null) {
            player.seekTo(savedInstanceState.getLong("current_position"));
     player.setPlayWhenReady(savedInstanceState.getBoolean("play_state"));
        }



        widgetButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                SharedPreferences.Editor editor = getActivity().getSharedPreferences("INGREDIENTS", MODE_PRIVATE).edit();
                editor.putString("ingredients", ingredients);
                editor.putString("name", name);
                editor.commit();
                Toast.makeText(getContext(), "Widget Added to Home Screen", Toast.LENGTH_SHORT).show();
            }
        });


        return rootView;
    }


    public void initializePlayer(){
        player = ExoPlayerFactory.newSimpleInstance(getContext(), new DefaultTrackSelector());
        playerView.setPlayer(player);
        DefaultDataSourceFactory dataSourceFactory = new DefaultDataSourceFactory(getContext(), Util.getUserAgent(getContext(), "exo-demo"));
        ExtractorMediaSource mediaSource = new ExtractorMediaSource.Factory(dataSourceFactory).createMediaSource(Uri.parse(videoUrl));
        player.prepare(mediaSource);
        player.setPlayWhenReady(true);
    }

    @Override
    public void onStart() {
        super.onStart();
        if ((Util.SDK_INT > 23)) {
            initializePlayer();
        }
    }


    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        if (player != null) {
            outState.putLong("current_position", player.getCurrentPosition());
            outState.putBoolean("play_state", player.getPlayWhenReady());
        }
    }

    @Override
    public void onStop() {
        super.onStop();
        Log.i(TAG, "onStop:called ");
        playerView.setPlayer(null);
        if (player != null)
           player.release();
        }
    }
    @Override
    public void onDestroy() {
        super.onDestroy();
        Log.i(TAG, "onDestroy:called ");
        playerView.setPlayer(null);
    }

    @Override
    public void onResume() {
        super.onResume();
        if ((Util.SDK_INT <= 23 || player == null)) {
            initializePlayer();
        }

    }


}

这是到存储库的链接。 https://github.com/Rahulxx01/Baking-App-Nanodegree

Answer 1

尝试将此行添加到清单文件中的玩家活动声明中：

android:configChanges="orientation|screenSize|layoutDirection"

Answer 2

解决方案：

在依赖项中添加以下代码：

// ViewModel
implementation "android.arch.lifecycle:extensions:1.1.1"

然后创建一个新类并将其扩展到ViewModel

public class Example extends ViewModel {
}

然后最后在Fragment的onCreate（）中：

ViewModelProviders.of(this).get(Example.class);

就是这样，您的旋转将受到控制。

希望有帮助

旋转到横向时，Exoplayer方向问题

2 个答案: