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Make demo app play content from download cache

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It's inserted before HttpDataSource as read only.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=189815245
This commit is contained in:
eguven 2018-03-20 14:50:08 -07:00 committed by Oliver Woodman
parent 764d18f68f
commit 522f8c8a99
1 changed files with 36 additions and 1 deletions
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37
demos/main/src/main/java/com/google/android/exoplayer2/demo/DemoApplication.java
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@ -19,16 +19,26 @@ import android.app.Application;
import com.google.android.exoplayer2.upstream.DataSource;
import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
import com.google.android.exoplayer2.upstream.DefaultHttpDataSourceFactory;
import com.google.android.exoplayer2.upstream.FileDataSourceFactory;
import com.google.android.exoplayer2.upstream.HttpDataSource;
import com.google.android.exoplayer2.upstream.TransferListener;
import com.google.android.exoplayer2.upstream.cache.Cache;
import com.google.android.exoplayer2.upstream.cache.CacheDataSource;
import com.google.android.exoplayer2.upstream.cache.CacheDataSourceFactory;
import com.google.android.exoplayer2.upstream.cache.NoOpCacheEvictor;
import com.google.android.exoplayer2.upstream.cache.SimpleCache;
import com.google.android.exoplayer2.util.Util;
import java.io.File;
/**
* Placeholder application to facilitate overriding Application methods for debugging and testing.
*/
public class DemoApplication extends Application {
private static final String DOWNLOAD_CACHE_FOLDER = "downloads";
protected String userAgent;
private Cache downloadCache;
@Override
public void onCreate() {
@ -38,7 +48,9 @@ public class DemoApplication extends Application {
/** Returns a {@link DataSource.Factory}. */
public DataSource.Factory buildDataSourceFactory(TransferListener<? super DataSource> listener) {
return new DefaultDataSourceFactory(this, listener, buildHttpDataSourceFactory(listener));
DefaultDataSourceFactory upstreamFactory =
new DefaultDataSourceFactory(this, listener, buildHttpDataSourceFactory(listener));
return createReadOnlyCacheDataSource(upstreamFactory, getDownloadCache());
}
/** Returns a {@link HttpDataSource.Factory}. */
@ -47,8 +59,31 @@ public class DemoApplication extends Application {
return new DefaultHttpDataSourceFactory(userAgent, listener);
}
/** Returns the download {@link Cache}. */
public Cache getDownloadCache() {
if (downloadCache == null) {
File dir = getExternalFilesDir(null);
if (dir == null) {
dir = getFilesDir();
}
File downloadCacheFolder = new File(dir, DOWNLOAD_CACHE_FOLDER);
downloadCache = new SimpleCache(downloadCacheFolder, new NoOpCacheEvictor());
}
return downloadCache;
}
public boolean useExtensionRenderers() {
return "withExtensions".equals(BuildConfig.FLAVOR);
}
private static CacheDataSourceFactory createReadOnlyCacheDataSource(
DefaultDataSourceFactory upstreamFactory, Cache cache) {
return new CacheDataSourceFactory(
cache,
upstreamFactory,
new FileDataSourceFactory(),
/*cacheWriteDataSinkFactory=*/ null,
CacheDataSource.FLAG_IGNORE_CACHE_ON_ERROR,
/*eventListener=*/ null);
}
}