How to use

com.ctc.wstx.util.SimpleCache

constructor

public synchronized void addCachedDTD(DTDId id, DTDSubset extSubset)
{
  if (mDTDCache == null) {
    mDTDCache = new SimpleCache(mConfig.getDtdCacheSize());
  }
  mDTDCache.add(id, extSubset);
}

 class SimpleCacheFactory implements CacheFactory {
 private final String cacheName; //example cache parameter

 public SimpleCacheFactory( String cacheName ) {
  this.cacheName = cacheName;
 }

 public Cache newCache() {
  return new SimpleCache( cacheName );
 }
}

 public void preparePlayer(String videoUri) {
  MediaSource videoSource =
      new ExtractorMediaSource( Uri.parse( videoUri ), dataSourceFactory, extractorsFactory, handler, null );
  exoPlayer.prepare( videoSource );
  exoPlayer.setPlayWhenReady( true );
}

public DataSource.Factory buildDataSourceFactory() {
  return new DataSource.Factory() {
    @Override
    public DataSource createDataSource() {
      LeastRecentlyUsedCacheEvictor evictor = new LeastRecentlyUsedCacheEvictor( CACHE_SIZE_BYTES );
      File cacheDir = //Your cache dir
      SimpleCache simpleCache = new SimpleCache( cacheDir, evictor );
      DataSource dataSource = buildMyDataSourceFactory().createDataSource();
      int cacheFlags = CacheDataSource.FLAG_BLOCK_ON_CACHE | CacheDataSource.FLAG_CACHE_UNBOUNDED_REQUESTS;
      return new CacheDataSource( simpleCache, dataSource, cacheFlags, CACHE_SIZE_BYTES );
    }
  };
}

private DefaultDataSource.Factory buildMyDataSourceFactory() {
  return new DefaultDataSourceFactory( context, "jesty-android", new DefaultBandwidthMeter() );
}

@Override
public synchronized void addCachedDTD(DTDId id, DTDSubset extSubset)
{
  if (mDTDCache == null) {
    mDTDCache = new SimpleCache<DTDId,DTDSubset>(mConfig.getDtdCacheSize());
  }
  mDTDCache.add(id, extSubset);
}

public synchronized void addCachedDTD(DTDId id, DTDSubset extSubset)
{
  if (mDTDCache == null) {
    mDTDCache = new SimpleCache(mConfig.getDtdCacheSize());
  }
  mDTDCache.add(id, extSubset);
}

@Override
public synchronized void addCachedDTD(DTDId id, DTDSubset extSubset)
{
  if (mDTDCache == null) {
    mDTDCache = new SimpleCache<DTDId,DTDSubset>(mConfig.getDtdCacheSize());
  }
  mDTDCache.add(id, extSubset);
}

public synchronized void addCachedDTD(DTDId id, DTDSubset extSubset)
{
  if (mDTDCache == null) {
    mDTDCache = new SimpleCache(mConfig.getDtdCacheSize());
  }
  mDTDCache.add(id, extSubset);
}

public synchronized void addCachedDTD(DTDId id, DTDSubset extSubset)
{
  if (mDTDCache == null) {
    mDTDCache = new SimpleCache(mConfig.getDtdCacheSize());
  }
  mDTDCache.add(id, extSubset);
}

public synchronized void addCachedDTD(DTDId id, DTDSubset extSubset)
{
  if (mDTDCache == null) {
    mDTDCache = new SimpleCache(mConfig.getDtdCacheSize());
  }
  mDTDCache.add(id, extSubset);
}

@Override
public synchronized void addCachedDTD(DTDId id, DTDSubset extSubset)
{
  if (mDTDCache == null) {
    mDTDCache = new SimpleCache<DTDId,DTDSubset>(mConfig.getDtdCacheSize());
  }
  mDTDCache.add(id, extSubset);
}