Widget - Webview Download Apk

String destination = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + "/";

String fileName = "AppName.apk";
destination += fileName;
final Uri uri = Uri.parse("file://" + destination);
java.io.File file = new java.io.File(destination);
if (file.exists()) file.delete();
String url = "URL Apk..";
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
request.setDescription("Updating..");
request.setTitle("Download");
request.setDestinationUri(uri);
final DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
final long downloadId = manager.enqueue(request);

BroadcastReceiver onComplete = new BroadcastReceiver() {
public void onReceive(Context ctxt, Intent intent) {
Intent install = new Intent(Intent.ACTION_VIEW);
install.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
install.setDataAndType(uri, manager.getMimeTypeForDownloadedFile(downloadId));
startActivity(install);
unregisterReceiver(this);
finish();
}};
registerReceiver(onComplete, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));


//Or Using Intent Only

Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new java.io.File(Environment.getExternalStorageDirectory() + "/download/" + "app.apk")), "application/vnd.android.package-archive");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);


//Use permission
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

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