如何发挥从SD卡视频 [英] how to play video from sdcard
问题描述
我在做的一个项目，我的产品类别的数量和每个产品类别包含一个视频。
我被从Web服务获取URL播放视频。当我第一次播放的视频，应该从URL中下载该视频只有一次。当没有互联网连接就应该从那里下载（SD卡）播放。假设我已经下载了所有三款产品3段视频，现在我必须发挥这些视频的时候没有从SD卡互联网即。这里来的问题，如何让特定的视频路径各自的产品。我没有开画廊。我必须直接播放视频，该产品。以及如何限制视频下载更多然后一次。
我的code播放视频
私人无效的playVideo（字符串路径）{ 对话框=新的对话框（这一点，android.R.style.Theme_Translucent_NoTitleBar）;
dialog.setContentView（R.layout.layout_video_popup）; ImageView的imgViewClose =（ImageView的）dialog.findViewById（R.id.imgViewClose）;
imgViewClose.setOnClickListener（本）; btnPlayPause =（按钮）dialog.findViewById（R.id.button1）;
btnPlayPause.setOnClickListener（本）; 搜索栏=（搜索栏）dialog.findViewById（R.id.seekBar1）;
seekBar.setOnClickListener（本）;
的LinearLayout =（的LinearLayout）dialog.findViewById（R.id.linerlayout_bottom）;
mVideoView =（VideoView）dialog.findViewById（R.id.videoView）;
mVideoView.setOnTouchListener（本）;
mVideoView.setOn preparedListener（本）;
mVideoView.setOnCompletionListener（本）;
dialog.show（）; 的playVideo（路径，mVideoView）;
AppLog.d（视频，的playVideo（），路径）;
}私人无效的playVideo（字符串路径，VideoView mVideoView）{
如果（路径== NULL || path.isEmpty（））{
返回;
} 尝试{
pDialpg = ProgressDialog.show（这一点，视频，请稍候...，假的，真正的）;
mVideoView.setVideoPath（路径）;
mVideoView.requestFocus（）;
RelativeLayout.LayoutParams relativeParams =新RelativeLayout.LayoutParams（LayoutParams.FILL_PARENT，LayoutParams.FILL_PARENT）;
relativeParams.addRule（RelativeLayout.ALIGN_PARENT_BOTTOM，RelativeLayout.TRUE）;
relativeParams.addRule（RelativeLayout.ALIGN_PARENT_TOP，RelativeLayout.TRUE）;
mVideoView.setLayoutParams（relativeParams）;
mVideoView.invalidate（）;
}赶上（例外五）{
// TODO：处理异常
}
这就是你如何能做到这一点的例子...
您可以检查是否有连接：
公共布尔checkConnectivity（上下文的背景下）{ Log.d（TAG检查连接）;
尝试{
connectivityManager =（ConnectivityManager）上下文
.getSystemService（Context.CONNECTIVITY_SERVICE）;
wifiInfo = connectivityManager
.getNetworkInfo（ConnectivityManager.TYPE_WIFI）;
mobileInfo = connectivityManager
.getNetworkInfo（ConnectivityManager.TYPE_MOBILE）; 如果（wifiInfo.isConnected（）|| mobileInfo.isConnected（））{
Log.d（TAG，WIFI /手机连接找到）;
返回true;
}
}赶上（例外五）{
Log.w（TAG，问题+ E）;
}
Log.d（TAG，没有找到连接 - 脱机工作）;
返回false;
}
第一次，如果没有连接，你可以设置一个默认的警告，例如：没有互联网连接无法播放视频
如果有康涅狄格州。你可以只播放流，如：
公共无效playVideoStream（上下文的背景下，
字符串URL，最终VideoView videoView）{ Log.d（TAG，播放视频流）; 的MediaController的MediaController =新的MediaController（背景）;
mediaController.setAnchorView（videoView）; 乌里视频= Uri.parse（URL）;
videoView.setMediaController（的MediaController）;
videoView.setVideoURI（视频） videoView.setOn preparedListener（新在preparedListener（）{ 在prepared（MediaPlayer的MP）公共无效{
videoView.start（）;
}
}）; 返回null;
}
如果你已经下载了它：
公共无效playVideoOffline（上下文的背景下，
字符串文件路径，VideoView videoView）{ Log.d（TAG，播放视频离线）; videoView.setVideoPath（文件路径）; 的MediaController的MediaController =新的MediaController（背景）;
mediaController.setMediaPlayer（videoView）; videoView.setMediaController（的MediaController）;
videoView.requestFocus（）; videoView.start（）; 返回null;
}
这是一种方式，你可以做到这一点，不一定做的最好的方法。
i am doing on a project where i have numbers of product categories and each product category contains a single video. i am playing video by getting url from web service. when first time i play that video it should download that video from that url only once. and when there is no internet connectivity it should play from where it is downloaded(sdcard). suppose i have downloaded 3 videos for all three products now i have to play those videos when there is no internet i.e. from sdcard. here comes problem that how to get particular video path for respective products. i don't have to open gallery. i have to directly play that video for that product. and how to restrict video downloading more then once. my code for playing video is
private void playVideo(String path) {
dialog = new Dialog(this,android.R.style.Theme_Translucent_NoTitleBar);
dialog.setContentView(R.layout.layout_video_popup);
ImageView imgViewClose = (ImageView)dialog.findViewById(R.id.imgViewClose);
imgViewClose.setOnClickListener(this);
btnPlayPause = (Button) dialog.findViewById(R.id.button1);
btnPlayPause.setOnClickListener(this);
seekBar = (SeekBar) dialog.findViewById(R.id.seekBar1);
seekBar.setOnClickListener(this);
linearlayout = (LinearLayout) dialog.findViewById(R.id.linerlayout_bottom);
mVideoView = (VideoView)dialog.findViewById(R.id.videoView);
mVideoView.setOnTouchListener(this);
mVideoView.setOnPreparedListener(this);
mVideoView.setOnCompletionListener(this);
dialog.show();
playVideo(path, mVideoView);
AppLog.d("Video", "playVideo()", path);
}
private void playVideo(String path, VideoView mVideoView) {
if(path == null || path.isEmpty()) {
return;
}
try {
pDialpg = ProgressDialog.show(this, "Video", "Please wait..", false, true);
mVideoView.setVideoPath(path);
mVideoView.requestFocus();
RelativeLayout.LayoutParams relativeParams = new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
relativeParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, RelativeLayout.TRUE);
relativeParams.addRule(RelativeLayout.ALIGN_PARENT_TOP, RelativeLayout.TRUE);
mVideoView.setLayoutParams(relativeParams);
mVideoView.invalidate();
} catch (Exception e) {
// TODO: handle exception
}
This is just an example of how you could do it...
You can check if there's connection:
public Boolean checkConnectivity(Context context) {
Log.d(TAG, "Checking connectivity");
try {
connectivityManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
wifiInfo = connectivityManager
.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
mobileInfo = connectivityManager
.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
if (wifiInfo.isConnected() || mobileInfo.isConnected()) {
Log.d(TAG, "Wifi/mobile Connection found");
return true;
}
} catch (Exception e) {
Log.w(TAG, "PROBLEM " + e);
}
Log.d(TAG, "No connection found - working offline");
return false;
}
First time, if no connection, you could set a default warning for example: "Can't play video without internet connection"
if there's conn. you could just play streaming like:
public Void playVideoStream(Context context,
String url, final VideoView videoView) {
Log.d(TAG, "Playing video stream");
MediaController mediaController = new MediaController(context);
mediaController.setAnchorView(videoView);
Uri video = Uri.parse(url);
videoView.setMediaController(mediaController);
videoView.setVideoURI(video);
videoView.setOnPreparedListener(new OnPreparedListener() {
public void onPrepared(MediaPlayer mp) {
videoView.start();
}
});
return null;
}
and if you have already downloaded it:
public Void playVideoOffline(Context context,
String filePath, VideoView videoView) {
Log.d(TAG, "Playing video offline");
videoView.setVideoPath(filePath);
MediaController mediaController = new MediaController(context);
mediaController.setMediaPlayer(videoView);
videoView.setMediaController(mediaController);
videoView.requestFocus();
videoView.start();
return null;
}
This is one way you could do it, not necessarily the best way of doing it.
这篇关于如何发挥从SD卡视频的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
