How to implement push notification and file upload and download with webview? - file-upload

Question

I was wanting to know how my app can alert users that they have a notification on my forum? Also I'd like to know how I can allow users to upload and download files to and from my forum within the app. I'm using webview and not sure if my code is up to date. I'm a noob when it comes to this stuff.
Here's my code:
package technologx.technologx;
/**
* Created by Technologx on 12/22/15
* ©2015 Technologx All Rights Reserved
* http://technologx.fulba.com
*/
import android.os.Build;
import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.webkit.CookieSyncManager;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import com.google.android.gms.appindexing.Action;
import com.google.android.gms.appindexing.AppIndex;
import com.google.android.gms.common.api.GoogleApiClient;
#SuppressLint("SetJavaScriptEnabled")
public class MainActivity extends Activity {
/**
* ATTENTION: This was auto-generated to implement the App Indexing API.
* See https://g.co/AppIndexing/AndroidStudio for more information.
*/
private GoogleApiClient client;
private WebView webView;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// If the Android version is lower than Jellybean, use this call to hide
// the status bar.
if (Build.VERSION.SDK_INT < 16) {
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
}
// Adds Progress Bar Support
this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
// Makes Progress Bar Visible
getWindow().setFeatureInt(Window.FEATURE_PROGRESS, Window.PROGRESS_VISIBILITY_ON);
// Use forum.xml as webview layout
setContentView(R.layout.activity_main);
webView = (WebView) findViewById(R.id.webView);
webView.getSettings().setJavaScriptEnabled(true);
// Adds Zoom Control (You may not need this)
webView.getSettings().setSupportZoom(true);
// Enables Multi-Touch. if supported by ROM
webView.getSettings().setBuiltInZoomControls(true);
// Change to your own forum url
webView.loadUrl("http://technologx.96.lt/");
webView.setWebViewClient(new WebViewClient() {
public boolean shouldOverrideUrlLoading(WebView view, String url) {
// Loads only your forum domain and no others!
if (url.contains("technologx.96.lt") == true) {
view.loadUrl(url);
// Adds Progress Bar Support
super.onPageStarted(view, url, null);
findViewById(R.id.progressbar).setVisibility(View.VISIBLE);
// If they are not your domain, use browser instead
} else {
Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(i);
}
return true;
}
#Override
public void onPageFinished(WebView view, String url) {
// Removes Progress Bar
findViewById(R.id.progressbar).setVisibility(View.GONE);
// Adds Cookies. Yummy!
CookieSyncManager.getInstance().sync();
}
});
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();
}
#Override
public void onBackPressed() {
// Enables going back history
if (webView.copyBackForwardList().getCurrentIndex() > 0) {
webView.goBack();
} else {
// Your exit alert code, or alternatively line below to finish
// Finishes forum activity
super.onBackPressed();
}
}
#Override
public void onStart() {
super.onStart();
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
client.connect();
Action viewAction = Action.newAction(
Action.TYPE_VIEW, // TODO: choose an action type.
"Main Page", // TODO: Define a title for the content shown.
// TODO: If you have web page content that matches this app activity's content,
// make sure this auto-generated web page URL is correct.
// Otherwise, set the URL to null.
Uri.parse("http://host/path"),
// TODO: Make sure this auto-generated app deep link URI is correct.
Uri.parse("android-app://technologx.technologx/http/host/path")
);
AppIndex.AppIndexApi.start(client, viewAction);
}
#Override
public void onStop() {
super.onStop();
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
Action viewAction = Action.newAction(
Action.TYPE_VIEW, // TODO: choose an action type.
"Main Page", // TODO: Define a title for the content shown.
// TODO: If you have web page content that matches this app activity's content,
// make sure this auto-generated web page URL is correct.
// Otherwise, set the URL to null.
Uri.parse("http://host/path"),
// TODO: Make sure this auto-generated app deep link URI is correct.
Uri.parse("android-app://technologx.technologx/http/host/path")
);
AppIndex.AppIndexApi.end(client, viewAction);
client.disconnect();
}
}