我正在开发离子3应用程序,可将视频从服务器下载到设备的本机存储。我用这个URL来保存文件:
let externalDir = this.file.externalDataDirectory;
文件下载很好下载,我可以从设备上查看。 有关详细信息,存储中的文件链接为:
/storage/emulated/0/Android/data/xxxxxxxx/files/VideoTest1/0.mp4
但问题是我想使用<video>
标签将下载的视频播放到我的应用中,我使用相同的链接查看它但不起作用。任何帮助?
对不起我的英文
答案 0 :(得分:1)
我一直在寻找解决方案。我解决了这个问题如下。
在platform.ready()
函数之后,我创建了一个目录,如下所示。
this.file.createDir(this.file.externalDataDirectory , 'Videos', false).then(() => {
// console.log('Directory created successfully');
}).catch(() => {
// console.log('Failed to create directory');
});
在已创建目录中下载视频
import { FileTransfer, FileTransferObject } from '@ionic-native/file-transfer';
import { File } from '@ionic-native/file';
import { Diagnostic } from '@ionic-native/diagnostic';
...
constructor(private diagnostic: Diagnostic,
private transfer: FileTransfer, private file: File)
download(item) {
let downloadProgress: any;
const fileTransfer: FileTransferObject = this.transfer.create();
const url = encodeURI(item.url);
const targetPath = this.file.externalDataDirectory + 'Videos/' + item.title + '.mp4';
this.diagnostic.requestCameraAuthorization(true).then(() => {
fileTransfer.download(url, targetPath, true).then((entry) => {
// console.log('download complete: ' + entry.toURL());
}, (error) => {
console.log(error);
});
fileTransfer.onProgress((progress) => {
downloadProgress = Math.round((progress.loaded / progress.total) * 100) + '%';
console.log('Downloading progress ...', downloadProgress);
});
}, (error) => {
console.log(error);
});
}
在创建的Videos
文件夹中下载文件。您可以通过Android/data/com.your.app/files/
。
如果您正在使用android
并且无效,请在file.setReadable(true, false);
内添加FileTransfer.java
。
播放视频以供离线使用
确保index.html
<meta http-equiv="Content-Security-Policy" content="style-src 'self' 'unsafe-inline'; media-src *; connect-src *">
并在您的config.xml
文件中
<access origin="*" />
<allow-navigation href="*" />
<allow-navigation href="http://*/*" />
<allow-navigation href="file://*/*" />
<access origin="cdvfile://*" />
<allow-intent href="*" />
<access origin="*" />
如果没有添加它们。
最后在您的视频播放器页面
<video id="video" controls="controls" preload="metadata" autoplay="autoplay" webkit-playsinline="webkit-playsinline" class="videoPlayer">
<source [src]="content" type="video/mp4" />
</video>
在组件中
ionViewDidEnter() {
this.file.listDir(this.file.externalDataDirectory, 'Videos')
.then((data) => {
console.log(data[0]);
this.count = data.length;
const src = data[0].toInternalURL();
this.file.resolveLocalFilesystemUrl(src).then(data => {
this.content = data.toURL();
document.getElementById('video').setAttribute('src', this.content);
console.log('Content path cahnged ', this.content);
}, error => {
console.log('File path error');
})
})
.catch(err => console.log('Directory doesnt exist'));
}
就是这样。我希望有效。
答案 1 :(得分:0)
如果要访问任何文件以用于移动设备的本机存储。然后,您必须创建要访问的文件夹的本地服务器。
https://ionicframework.com/docs/native/httpd
constructor(public file:File, public ngZone : NgZone, public httpd :Httpd){
}
startLocalServe(){
let options: HttpdOptions = {
www_root: this.file.externalDataDirectory.replace('file://',''),
port: 9000,
localhost_only: true //if you want to create multiple localhost then false
};
this.httpd.startServer(options).subscribe(url => {
console.log('Server is live',url); //Server is live http://127.0.0.0.1:9000
this.ngZone.run(()=>{
this.localServeUrl = url;
})
},error => {
console.log('Fail to start Server : ',JSON.stringify(error));
});
}
现在,您将能够以src =“ http://127.0.0.0.1:9000 / VideoTest1 / 0.mp4”的形式访问localserveUrl
在app.component.ts中输入代码startLocalServe
this.platform.ready().then(()=>{
startLocalServe();
});