下载完成时如何通知
How To Have Notification When Download Complete
我的 android 应用程序中有下载功能。当我下载文件时,它会通过 toast 通知我。我想知道如何在下载完成时发出 toast 通知。我尝试了其他建议,但没有成功找到我预期的结果。
这是下载代码。
webView.setDownloadListener(new DownloadListener() {
@Override
public void onDownloadStart(String url, String userAgent, String contentDisposition,
String mimeType, long contentLength) {
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
request.setMimeType(mimeType);
String cookies = CookieManager.getInstance().getCookie(url);
request.addRequestHeader("cookie",cookies);
request.addRequestHeader("User-Agent",userAgent);
request.setDescription("Downloading File");
request.setTitle(URLUtil.guessFileName(url,contentDisposition,mimeType));
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS,
URLUtil.guessFileName(url, contentDisposition, mimeType));
DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
downloadManager.enqueue(request);
Toast.makeText(getApplicationContext(), "Downloading File", Toast.LENGTH_SHORT).show();
}
});
提前致谢。
您可以创建一个 Broadcast Receiver
来处理任何已完成下载的文件:
主要Activity
public class MainActivity extends AppCompatActivity {
// create an object
OnComplete onComplete ;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
WebView webView = null;
webView.setDownloadListener(new DownloadListener() {
@Override
public void onDownloadStart(String url, String userAgent, String contentDisposition,
String mimeType, long contentLength) {
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
request.setMimeType(mimeType);
String cookies = CookieManager.getInstance().getCookie(url);
request.addRequestHeader("cookie",cookies);
request.addRequestHeader("User-Agent",userAgent);
request.setDescription("Downloading File");
request.setTitle(URLUtil.guessFileName(url,contentDisposition,mimeType));
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS,
URLUtil.guessFileName(url, contentDisposition, mimeType));
DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
downloadManager.enqueue(request);
Toast.makeText(getApplicationContext(), "Downloading File", Toast.LENGTH_SHORT).show();
}
});
// the broadcast receiver object
onComplete = new OnComplete();
}
@Override
protected void onResume() {
super.onResume();
// to start handling any download that completes
registerReceiver(onComplete, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
}
@Override
protected void onPause() {
super.onPause();
// to stop handling download complete when exit app
unregisterReceiver(onComplete);
}
}
广播接收器(OnComplete)
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
public class OnComplete extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
// these codes will run when download completed
// And you can do some thing
}
}
并且请不要忘记在您的 Mainfest.xml
中的 <application/>
标签中添加此内容
<receiver android:name=".OnComplete" />
感谢@a7d.24_ 给出的答案。
我已经简化了答案,所以我不需要创建新的 Java Class (OnComplete),因此不需要将它添加到 Manifest.XML.
我只需在 webView.setDownloadListener 中添加一行代码并在 WebView Class 中创建新的 BroadcastReceiver Class。
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
...
webView.setDownloadListener(new DownloadListener() {
@Override
public void onDownloadStart(String url, String userAgent, String contentDisposition,
String mimeType, long contentLength) {
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
request.setMimeType(mimeType);
String cookies = CookieManager.getInstance().getCookie(url);
request.addRequestHeader("cookie",cookies);
request.addRequestHeader("User-Agent",userAgent);
request.setDescription("Downloading File");
request.setTitle(URLUtil.guessFileName(url,contentDisposition,mimeType));
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS,
URLUtil.guessFileName(url, contentDisposition, mimeType));
DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
//Registering receiver in Download Manager
registerReceiver(onCompleted, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
downloadManager.enqueue(request);
Toast.makeText(getApplicationContext(), "Downloading File", Toast.LENGTH_SHORT).show();
}
});
...
BroadcastReceiver onCompleted = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context.getApplicationContext(), "Download Finish", Toast.LENGTH_SHORT).show();
我的 android 应用程序中有下载功能。当我下载文件时,它会通过 toast 通知我。我想知道如何在下载完成时发出 toast 通知。我尝试了其他建议,但没有成功找到我预期的结果。
这是下载代码。
webView.setDownloadListener(new DownloadListener() {
@Override
public void onDownloadStart(String url, String userAgent, String contentDisposition,
String mimeType, long contentLength) {
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
request.setMimeType(mimeType);
String cookies = CookieManager.getInstance().getCookie(url);
request.addRequestHeader("cookie",cookies);
request.addRequestHeader("User-Agent",userAgent);
request.setDescription("Downloading File");
request.setTitle(URLUtil.guessFileName(url,contentDisposition,mimeType));
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS,
URLUtil.guessFileName(url, contentDisposition, mimeType));
DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
downloadManager.enqueue(request);
Toast.makeText(getApplicationContext(), "Downloading File", Toast.LENGTH_SHORT).show();
}
});
提前致谢。
您可以创建一个 Broadcast Receiver
来处理任何已完成下载的文件:
主要Activity
public class MainActivity extends AppCompatActivity {
// create an object
OnComplete onComplete ;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
WebView webView = null;
webView.setDownloadListener(new DownloadListener() {
@Override
public void onDownloadStart(String url, String userAgent, String contentDisposition,
String mimeType, long contentLength) {
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
request.setMimeType(mimeType);
String cookies = CookieManager.getInstance().getCookie(url);
request.addRequestHeader("cookie",cookies);
request.addRequestHeader("User-Agent",userAgent);
request.setDescription("Downloading File");
request.setTitle(URLUtil.guessFileName(url,contentDisposition,mimeType));
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS,
URLUtil.guessFileName(url, contentDisposition, mimeType));
DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
downloadManager.enqueue(request);
Toast.makeText(getApplicationContext(), "Downloading File", Toast.LENGTH_SHORT).show();
}
});
// the broadcast receiver object
onComplete = new OnComplete();
}
@Override
protected void onResume() {
super.onResume();
// to start handling any download that completes
registerReceiver(onComplete, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
}
@Override
protected void onPause() {
super.onPause();
// to stop handling download complete when exit app
unregisterReceiver(onComplete);
}
}
广播接收器(OnComplete)
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
public class OnComplete extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
// these codes will run when download completed
// And you can do some thing
}
}
并且请不要忘记在您的 Mainfest.xml
中的 <application/>
标签中添加此内容
<receiver android:name=".OnComplete" />
感谢@a7d.24_ 给出的答案。
我已经简化了答案,所以我不需要创建新的 Java Class (OnComplete),因此不需要将它添加到 Manifest.XML.
我只需在 webView.setDownloadListener 中添加一行代码并在 WebView Class 中创建新的 BroadcastReceiver Class。
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
...
webView.setDownloadListener(new DownloadListener() {
@Override
public void onDownloadStart(String url, String userAgent, String contentDisposition,
String mimeType, long contentLength) {
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
request.setMimeType(mimeType);
String cookies = CookieManager.getInstance().getCookie(url);
request.addRequestHeader("cookie",cookies);
request.addRequestHeader("User-Agent",userAgent);
request.setDescription("Downloading File");
request.setTitle(URLUtil.guessFileName(url,contentDisposition,mimeType));
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS,
URLUtil.guessFileName(url, contentDisposition, mimeType));
DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
//Registering receiver in Download Manager
registerReceiver(onCompleted, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
downloadManager.enqueue(request);
Toast.makeText(getApplicationContext(), "Downloading File", Toast.LENGTH_SHORT).show();
}
});
...
BroadcastReceiver onCompleted = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context.getApplicationContext(), "Download Finish", Toast.LENGTH_SHORT).show();