「Android/VideoView/ダウンロード」の版間の差分
提供: 初心者エンジニアの簡易メモ
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行96: | 行96: | ||
VideoDownloaderConnectionListener.java | VideoDownloaderConnectionListener.java | ||
<pre> | <pre> | ||
− | public interface | + | public interface VideoDownloaderConnectionListener |
{ | { | ||
void downloadSuccess(); | void downloadSuccess(); |
2018年11月22日 (木) 15:20時点における版
サンプル
事前ダウンロードして動画表示
VideoDownloaderConnection.java
import android.content.Context; import android.os.AsyncTask; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.io.FileOutputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; class VideoDownloaderConnection extends AsyncTask<Void, Long, Boolean> { private String TAG = "VideoDownloaderConnection"; private Context mContext; String mUrl = ""; VideoDownloaderConnectionListener mListener; public VideoDownloaderConnection(Context context) { mContext = context; } public void setUrl(String url) { mUrl = url; } public void setListener(VideoDownloaderConnectionListener listener) { mListener = listener; } @Override protected void onPreExecute() { super.onPreExecute(); } @Override protected Boolean doInBackground(Void... params) { URL u = null; InputStream is = null; try { u = new URL(mUrl); is = u.openStream(); HttpURLConnection huc = (HttpURLConnection)u.openConnection(); int size = huc.getContentLength(); if (huc != null) { String fileName = "FILE.mp4"; String storagePath = mContext.getExternalCacheDir().toString(); File f = new File(storagePath,fileName); FileOutputStream fos = new FileOutputStream(f); byte[] buffer = new byte[1024]; int len1 = 0; if (is != null) { while ((len1 = is.read(buffer)) > 0) { fos.write(buffer,0, len1); } } if (fos != null) { fos.close(); } } } catch (MalformedURLException mue) { mue.printStackTrace(); if (mListener != null) { mListener.downloadFailed(); } } catch (IOException ioe) { ioe.printStackTrace(); if (mListener != null) { mListener.downloadFailed(); } } finally { try { if (is != null) { is.close(); } } catch (IOException ioe) { if (mListener != null) { mListener.downloadFailed(); } } } return true; } @Override protected void onProgressUpdate(Long... values) { super.onProgressUpdate(values); } @Override protected void onPostExecute(Boolean aBoolean) { super.onPostExecute(aBoolean); Log.i(TAG, "onPostExecute"); if (mListener != null) { mListener.downloadSuccess(); } } }
VideoDownloaderConnectionListener.java
public interface VideoDownloaderConnectionListener { void downloadSuccess(); void downloadFailed(); }
上記サンプルDLの使い方
private VideoDownloaderConnectionListener mediaDownloaderLisener = new VideoDownloaderConnectionListener() { public void downloadSuccess() { } public void downloadFailed() { } }; VideoDownloaderConnection connection = new VideoDownloaderConnection(MainActivity.this.getApplicationContext()); connection.setUrl("~.mp4"); connection.setListener(mediaDownloaderLisener); connection.execute();
ストレージをcachedirとしているがいろいろ変更できる
String storagePath = context.getExternalCacheDir().toString(); // cachedir String storagePath = Environment.getExternalStorageDirectory().toString(); // sdcard
参考:http://blog.lciel.jp/blog/2014/02/08/android-about-storage/
上記DLしたmp4のvideoViewでの再生
mVideoView.setVideoPath(getApplicationContext().getExternalCacheDir().toString() + "/FILE.mp4");
参考
動画のダウンロード https://blog.engineer.adways.net/entry/2016/09/03/010627
Webview download/cache video https://stackoverflow.com/questions/23876103/webview-download-cache-video
YoutubeDownloadMp4 https://stackoverflow.com/questions/7203047/code-for-download-video-from-youtube-on-java-android