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<div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">com.google.android.exoplayer2.offline</a></div>
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<h2 title="Interface Downloader" class="title">Interface Downloader</h2>
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<dd><code><a href="../source/dash/offline/DashDownloader.html" title="class in com.google.android.exoplayer2.source.dash.offline">DashDownloader</a></code>, <code><a href="../source/hls/offline/HlsDownloader.html" title="class in com.google.android.exoplayer2.source.hls.offline">HlsDownloader</a></code>, <code><a href="ProgressiveDownloader.html" title="class in com.google.android.exoplayer2.offline">ProgressiveDownloader</a></code>, <code><a href="SegmentDownloader.html" title="class in com.google.android.exoplayer2.offline">SegmentDownloader</a></code>, <code><a href="../source/smoothstreaming/offline/SsDownloader.html" title="class in com.google.android.exoplayer2.source.smoothstreaming.offline">SsDownloader</a></code></dd>
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<pre>public interface <span class="typeNameLabel">Downloader</span></pre>
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<div class="block">Downloads and removes a piece of content.</div>
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<td class="colFirst"><code>static interface </code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="Downloader.ProgressListener.html" title="interface in com.google.android.exoplayer2.offline">Downloader.ProgressListener</a></span></code></th>
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<td class="colLast">
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<div class="block">Receives progress updates during download operations.</div>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd"> </span></span></caption>
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<td class="colFirst"><code>void</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#cancel()">cancel</a></span>()</code></th>
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<td class="colLast">
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<div class="block">Permanently cancels the downloading by this downloader.</div>
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<td class="colFirst"><code>void</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#download(com.google.android.exoplayer2.offline.Downloader.ProgressListener)">download</a></span>​(<a href="Downloader.ProgressListener.html" title="interface in com.google.android.exoplayer2.offline">Downloader.ProgressListener</a> progressListener)</code></th>
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<td class="colLast">
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<div class="block">Downloads the content.</div>
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</td>
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<td class="colFirst"><code>void</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#remove()">remove</a></span>()</code></th>
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<td class="colLast">
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<div class="block">Removes the content.</div>
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<h4>download</h4>
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<pre class="methodSignature">void download​(@Nullable
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<a href="Downloader.ProgressListener.html" title="interface in com.google.android.exoplayer2.offline">Downloader.ProgressListener</a> progressListener)
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throws <a href="https://developer.android.com/reference/java/io/IOException.html" title="class or interface in java.io" class="externalLink" target="_top">IOException</a>,
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<a href="https://developer.android.com/reference/java/lang/InterruptedException.html" title="class or interface in java.lang" class="externalLink" target="_top">InterruptedException</a></pre>
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<div class="block">Downloads the content.
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<p>If downloading fails, this method can be called again to resume the download. It cannot be
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called again after the download has been <a href="#cancel()"><code>canceled</code></a>.
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<p>If downloading is canceled whilst this method is executing, then it is expected that it will
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return reasonably quickly. However, there are no guarantees about how the method will return,
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meaning that it can return without throwing, or by throwing any of its documented exceptions.
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The caller must use its own knowledge about whether downloading has been canceled to determine
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whether this is why the method has returned, rather than relying on the method returning in a
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particular way.</div>
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>progressListener</code> - A listener to receive progress updates, or <code>null</code>.</dd>
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<dt><span class="throwsLabel">Throws:</span></dt>
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<dd><code><a href="https://developer.android.com/reference/java/io/IOException.html" title="class or interface in java.io" class="externalLink" target="_top">IOException</a></code> - If the download failed to complete successfully.</dd>
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<dd><code><a href="https://developer.android.com/reference/java/lang/InterruptedException.html" title="class or interface in java.lang" class="externalLink" target="_top">InterruptedException</a></code> - If the download was interrupted.</dd>
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<dd><code><a href="https://developer.android.com/reference/java/util/concurrent/CancellationException.html" title="class or interface in java.util.concurrent" class="externalLink" target="_top">CancellationException</a></code> - If the download was canceled.</dd>
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<h4>cancel</h4>
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<pre class="methodSignature">void cancel()</pre>
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<div class="block">Permanently cancels the downloading by this downloader. The caller should also interrupt the
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downloading thread immediately after calling this method.
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<p>Once canceled, <a href="#download(com.google.android.exoplayer2.offline.Downloader.ProgressListener)"><code>download(com.google.android.exoplayer2.offline.Downloader.ProgressListener)</code></a> cannot be called again.</div>
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<h4>remove</h4>
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<pre class="methodSignature">void remove()</pre>
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<div class="block">Removes the content.</div>
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