ExoPlayer onResume() Wiedergabezustand wiederherstellen

Question

Ich habe den Player implementiert und jetzt gibt es ein Problem. Wenn das Video abgespielt wird und die App geschlossen und wieder fortgesetzt wird, bleibt der Bildschirm hängen. Ich habe die ExoPlayer Demo Activity von Google zum besseren Verständnis gesehen, aber ich konnte sie nicht in meiner App implementieren. Ich habe die Player-Aktivität hier angehängt und für den vollständigen Code teile ich das GitHub-Repository für alle Dateien.

RecipeStepDetailFragment.java

package com.example.android.recipe.ui; 

import android.content.Context; 
import android.content.res.Configuration; 
import android.net.Uri; 
import android.os.Bundle; 
import android.os.Handler; 
import android.support.v4.app.Fragment; 
import android.support.v4.content.ContextCompat; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.Button; 
import android.widget.ImageView; 
import android.widget.LinearLayout; 
import android.widget.TextView; 
import android.widget.Toast; 
import com.example.android.recipe.R; 
import com.example.android.recipe.pojo.Recipe; 
import com.example.android.recipe.pojo.Step; 
import com.google.android.exoplayer2.LoadControl; 
import com.google.android.exoplayer2.SimpleExoPlayer; 
import com.google.android.exoplayer2.source.ExtractorMediaSource; 
import com.google.android.exoplayer2.ui.AspectRatioFrameLayout; 
import com.google.android.exoplayer2.ui.SimpleExoPlayerView; 
import java.util.ArrayList; 
import java.util.List; 
import com.google.android.exoplayer2.DefaultLoadControl; 
import com.google.android.exoplayer2.ExoPlayerFactory; 
import com.google.android.exoplayer2.extractor.DefaultExtractorsFactory; 
import com.google.android.exoplayer2.source.MediaSource; 
import com.google.android.exoplayer2.trackselection.AdaptiveVideoTrackSelection; 
import com.google.android.exoplayer2.trackselection.DefaultTrackSelector; 
import com.google.android.exoplayer2.trackselection.TrackSelection; 
import com.google.android.exoplayer2.upstream.BandwidthMeter; 
import com.google.android.exoplayer2.upstream.DefaultBandwidthMeter; 
import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory; 
import com.google.android.exoplayer2.util.Util; 
import com.squareup.picasso.Picasso; 

import static com.example.android.recipe.ui.RecipeActivity.SELECTED_INDEX; 
import static com.example.android.recipe.ui.RecipeActivity.SELECTED_RECIPES; 
import static com.example.android.recipe.ui.RecipeActivity.SELECTED_STEPS; 

public class RecipeStepDetailFragment extends Fragment { 
    private SimpleExoPlayerView simpleExoPlayerView; 
    private SimpleExoPlayer player; 
    private BandwidthMeter bandwidthMeter; 
    private ArrayList<Step> steps = new ArrayList<>(); 
    private int selectedIndex; 
    private Handler mainHandler; 
    ArrayList<Recipe> recipe; 
    String recipeName; 
    public RecipeStepDetailFragment() { } 
    private ListItemClickListener itemClickListener; 
    public interface ListItemClickListener { 
     void onListItemClick(List<Step> allSteps,int Index,String recipeName); 
    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
     TextView textView; 
     mainHandler = new Handler(); 
     bandwidthMeter = new DefaultBandwidthMeter(); 
     itemClickListener =(RecipeDetailActivity)getActivity(); 
     recipe = new ArrayList<>(); 
     if(savedInstanceState != null) { 
      steps = savedInstanceState.getParcelableArrayList(SELECTED_STEPS); 
      selectedIndex = savedInstanceState.getInt(SELECTED_INDEX); 
      recipeName = savedInstanceState.getString("Title"); 
     } 
     else { 
      steps =getArguments().getParcelableArrayList(SELECTED_STEPS); 
      if (steps!=null) { 
       steps =getArguments().getParcelableArrayList(SELECTED_STEPS); 
       selectedIndex=getArguments().getInt(SELECTED_INDEX); 
       recipeName=getArguments().getString("Title"); 
      } 
      else { 
       recipe =getArguments().getParcelableArrayList(SELECTED_RECIPES); 
       steps=(ArrayList<Step>)recipe.get(0).getSteps(); 
       selectedIndex=0; 
      } 
     } 
     View rootView = inflater.inflate(R.layout.recipe_step_detail_fragment_body_part, container, false); 
     textView = (TextView) rootView.findViewById(R.id.recipe_step_detail_text); 
     textView.setText(steps.get(selectedIndex).getDescription()); 
     textView.setVisibility(View.VISIBLE); 
     simpleExoPlayerView = (SimpleExoPlayerView) rootView.findViewById(R.id.playerView); 
     simpleExoPlayerView.setResizeMode(AspectRatioFrameLayout.RESIZE_MODE_FIT); 
     String videoURL = steps.get(selectedIndex).getVideoURL(); 
     if (rootView.findViewWithTag("sw600dp-port-recipe_step_detail")!=null) { 
      recipeName=((RecipeDetailActivity) getActivity()).recipeName; 
      ((RecipeDetailActivity) getActivity()).getSupportActionBar().setTitle(recipeName); 
     } 
     String imageUrl=steps.get(selectedIndex).getThumbnailURL(); 
     if (imageUrl!="") { 
      Uri builtUri = Uri.parse(imageUrl).buildUpon().build(); 
      ImageView thumbImage = (ImageView) rootView.findViewById(R.id.thumbImage); 
      Picasso.with(getContext()).load(builtUri).into(thumbImage); 
     } 
     if (!videoURL.isEmpty()) { 
      initializePlayer(Uri.parse(steps.get(selectedIndex).getVideoURL())); 
      if (rootView.findViewWithTag("sw600dp-land-recipe_step_detail")!=null) { 
       getActivity().findViewById(R.id.fragment_container2).setLayoutParams(new LinearLayout.LayoutParams(-1,-2)); 
       simpleExoPlayerView.setResizeMode(AspectRatioFrameLayout.RESIZE_MODE_FIXED_WIDTH); 
      } 
      else if (isInLandscapeMode(getContext())){ 
       textView.setVisibility(View.GONE); 
      } 
     } 
     else { 
      player=null; 
      simpleExoPlayerView.setForeground(ContextCompat.getDrawable(getContext(), R.drawable.ic_visibility_off_white_36dp)); 
      simpleExoPlayerView.setLayoutParams(new LinearLayout.LayoutParams(300, 300)); 
     } 
     Button mPrevStep = (Button) rootView.findViewById(R.id.previousStep); 
     Button mNextstep = (Button) rootView.findViewById(R.id.nextStep); 

     mPrevStep.setOnClickListener(new View.OnClickListener() { 
      public void onClick(View view) { 
      if (steps.get(selectedIndex).getId() > 0) { 
       if (player!=null){ 
        player.stop(); 
       } 
       itemClickListener.onListItemClick(steps,steps.get(selectedIndex).getId() - 1,recipeName); 
      } 
      else { 
       Toast.makeText(getActivity(),"You already are in the First step of the recipe", Toast.LENGTH_SHORT).show(); 
      } 
     }}); 

     mNextstep.setOnClickListener(new View.OnClickListener() { 
      public void onClick(View view) { 
      int lastIndex = steps.size()-1; 
      if (steps.get(selectedIndex).getId() < steps.get(lastIndex).getId()) { 
       if (player!=null){ 
        player.stop(); 
       } 
       itemClickListener.onListItemClick(steps,steps.get(selectedIndex).getId() + 1,recipeName); 
      } 
      else { 
       Toast.makeText(getContext(),"You already are in the Last step of the recipe", Toast.LENGTH_SHORT).show(); 
      } 
     }}); 
     return rootView; 
    } 

    private void initializePlayer(Uri mediaUri) { 
     if (player == null) { 
      TrackSelection.Factory videoTrackSelectionFactory = new AdaptiveVideoTrackSelection.Factory(bandwidthMeter); 
      DefaultTrackSelector trackSelector = new DefaultTrackSelector(mainHandler, videoTrackSelectionFactory); 
      LoadControl loadControl = new DefaultLoadControl(); 
      player = ExoPlayerFactory.newSimpleInstance(getContext(), trackSelector, loadControl); 
      simpleExoPlayerView.setPlayer(player); 
      String userAgent = Util.getUserAgent(getContext(), "Baking App"); 
      MediaSource mediaSource = new ExtractorMediaSource(mediaUri, new DefaultDataSourceFactory(getContext(), userAgent), new DefaultExtractorsFactory(), null, null); 
      player.prepare(mediaSource); 
      player.setPlayWhenReady(true); 
     } 
    } 

    @Override 
    public void onSaveInstanceState(Bundle currentState) { 
     super.onSaveInstanceState(currentState); 
     currentState.putParcelableArrayList(SELECTED_STEPS,steps); 
     currentState.putInt(SELECTED_INDEX,selectedIndex); 
     currentState.putString("Title",recipeName); 
    } 

    public boolean isInLandscapeMode(Context context) { 
     return (context.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE); 
    } 

    @Override 
    public void onDetach() { 
     super.onDetach(); 
     if (player!=null) { 
      player.stop(); 
      player.release(); 
     } 
    } 

    @Override 
    public void onDestroyView() { 
     super.onDestroyView(); 
     if (player!=null) { 
      player.stop(); 
      player.release(); 
      player=null; 
     } 
    } 

    @Override 
    public void onStop() { 
     super.onStop(); 
     if (player!=null) { 
      player.stop(); 
      player.release(); 
     } 
    } 

    @Override 
    public void onPause() { 
     super.onPause(); 
     if (player!=null) { 
      player.stop(); 
      player.release(); 
     } 
    } 
} 

komplettes Projekt Repository: https://github.com/mtp2697/Udacity-AndroidDeveloperNanodegree-BakingApp

Hilfe bei der Wiederherstellung des Zustands des Video-Player für onPause() und onResume()

Danke, Praveen thirumurugan .

Answer 1

konfrontiert ich das gleiche Problem in meiner Vorlage für die Back app und ich habe so etwas wie dies:

private void initPlayer() { 
    // Exoplayer 


    // 1. Create a default TrackSelector 
    // Handler mainHandler = new Handler(); 
    videoTrackSelectionFactory = new AdaptiveTrackSelection.Factory(bandwidthMeter); 
    trackSelector = new DefaultTrackSelector(videoTrackSelectionFactory); 
    RenderersFactory render = new DefaultRenderersFactory(getContext()); 
    mainHandler = new Handler(); 
    if (CookieHandler.getDefault() != DEFAULT_COOKIE_MANAGER) { 
     CookieHandler.setDefault(DEFAULT_COOKIE_MANAGER); 
    } 

    // 2. Create a default LoadControl 
    LoadControl loadControl = new DefaultLoadControl(); 

    // 3. Create the player 
    recipeVideoPlayer = ExoPlayerFactory.newSimpleInstance(render, trackSelector, loadControl); 

    // exoPlayerView = (SimpleExoPlayerView) v.findViewById(R.id.exoplayer_recipe); 

    // Set media controller 
    mExoplayer.setUseController(true); 
    mExoplayer.setControllerVisibilityListener(this); 

    mExoplayer.requestFocus(); 


    // Bind the player to the view. 

    mExoplayer.setPlayer(recipeVideoPlayer); 

    if (TextUtils.isEmpty(mSteps.getVideoURL())) { 

     mExoplayer.setVisibility(View.GONE); 


    } else { 

     mExoplayer.setVisibility(View.VISIBLE); 
     Uri video = Uri.parse(mSteps.getVideoURL()); 
     DefaultDataSourceFactory dataSourceFactory = new DefaultDataSourceFactory(getContext(), Util.getUserAgent(getContext(), "recipes"), null); 
     ExtractorsFactory extractorsFactory = new DefaultExtractorsFactory(); 

     MediaSource videoSource = new ExtractorMediaSource(video, dataSourceFactory, extractorsFactory, mainHandler, null); 
     boolean haveResumePosition = resumeWindow != C.INDEX_UNSET; 
     if (haveResumePosition) { 
      recipeVideoPlayer.seekTo(resumeWindow, resumePosition); 
     } 
     recipeVideoPlayer.prepare(videoSource, !haveResumePosition, false); 

     recipeVideoPlayer.setPlayWhenReady(true); 


     recipeVideoPlayer.addListener(new ExoPlayer.EventListener() { 
      @Override 
      public void onTimelineChanged(Timeline timeline, Object manifest) { 

      } 

      @Override 
      public void onTracksChanged(TrackGroupArray trackGroups, TrackSelectionArray trackSelections) { 

       // Toast.makeText(getContext(), "Track changed" + trackSelections.length, Toast.LENGTH_SHORT).show(); 
       // 


      } 

      @Override 
      public void onLoadingChanged(boolean isLoading) { 

      } 

      @Override 
      public void onPlayerStateChanged(boolean playWhenReady, int playbackState) { 


      } 


      @Override 
      public void onPlayerError(ExoPlaybackException error) { 
       clearResumePosition(); 
      } 

      @Override 
      public void onPositionDiscontinuity() { 
       // updateResumePosition(); 
      } 

      @Override 
      public void onPlaybackParametersChanged(PlaybackParameters playbackParameters) { 

      } 


     }); 
    } 


} 

---

private void releasePlayer() { 
     if (recipeVideoPlayer != null) { 
      updateResumePosition(); 
      recipeVideoPlayer.stop(); 
      recipeVideoPlayer.release(); 
      recipeVideoPlayer = null; 
     } 
} 

---

@Override 
    public void onResume() { 
     super.onResume(); 
     if (recipeVideoPlayer == null) { 
      initPlayer(); 
     } 
} 

---

@Override 
    public void onPause() { 
     super.onPause(); 
     releasePlayer(); 

} 

you can refer my project here