CODEWITHSUNDEEP
androidwebviewandroid-webview
Genadinik
Genadinik

Reputation: 18639

Android WebView not stopping after user presses back

I am playing a YouTube video inside a WebView. I am able to play it, but when the person leaves the screen, I am not able to stop the audio from playing.

I tried various things inside onDestroy and onPause, or taking them out entirely, but they didn't seem to make a difference.

Would anyone know why the audio keeps playing and doesn't stop even after the app is turned off and the user opens other apps?

Here is my code for the whole class:

import com.flurry.android.FlurryAgent;

import utils.SendEmail;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.KeyEvent;
import android.view.View;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.webkit.WebSettings.PluginState;
import android.widget.Button;

public class YoutubeActivity extends Activity
{
    WebView webview = null;

    @Override
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        webview = new WebView(this);

            setContentView(webview);

            webview.getSettings().setAppCacheEnabled(false);
            webview.getSettings().setJavaScriptEnabled(true);
            webview.setInitialScale(1);
            webview.getSettings().setPluginState(PluginState.ON);

            WebSettings webSettings = webview.getSettings();

            webSettings.setLoadsImagesAutomatically(true);
            webSettings.setLoadWithOverviewMode(true);
            webSettings.setBuiltInZoomControls(true);        
            webSettings.setUseWideViewPort(true);

            webview.setWebViewClient(new WebViewClient() {
                public boolean shouldOverrideUrlLoading(WebView view, String url) {
                    view.loadUrl(url);              
                    return false;
                }
            });        


            webview.setWebChromeClient(new WebChromeClient(){});

            webSettings.setDomStorageEnabled(true);
            webSettings.setAppCacheEnabled(true);
                        webSettings.setAppCachePath(getApplicationContext().getFilesDir().getAbsolutePath() + "/cache");            

            webSettings.setDatabaseEnabled(true);
            webSettings.setDatabasePath(getApplicationContext().getFilesDir().getAbsolutePath() + "/databases");

            SharedPreferences prefs = 
                    PreferenceManager.getDefaultSharedPreferences( YoutubeActivity.this);
            String url_to_watch = prefs.getString( "url_to_watch" , null ); 


            webview.loadUrl(url_to_watch);
    }



    @Override
    public void onPause()
    {
       super.onPause();

       try
       {
           if ( webview != null )
           {
               webview.clearCache(true); 
               webview.getSettings().setAppCacheEnabled(false);
               webview.stopLoading();
               webview.destroy();           
               sendEmail ("in pause " , "");
               webview = new WebView(this);
           }

           this.finish();
       }
       catch ( Exception e )
       {

       }
    }


    @Override
    public void onDestroy()
    {
       super.onDestroy();

       try
       {
           if ( webview != null )
           {
               webview = new WebView(this); // To try to reset the webview - didn't work.
           }
       }
       catch ( Exception e )
       {

       }    
    }

    @Override
    public void onStop()
    {
       super.onStop();

       FlurryAgent.onEndSession(this);

       try
       {
           if ( webview != null )
           {
               webview.clearView();
               webview.getSettings().setAppCacheEnabled(false);
               webview.stopLoading();
               webview.destroy();

               sendEmail ("in stop " , "");
           }
       }
       catch ( Exception e )
       {

       }

       this.finish();
    }   

    @Override
    protected void onResume() 
    {
        super.onResume();

        try
        {
            webview.onResume();
        }
        catch ( Exception  e )
        {

        }
    }

    @Override
    protected void onRestart() 
    {
        super.onRestart();
    }    


    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) 
    {
        if ((keyCode == KeyEvent.KEYCODE_BACK) && webview.canGoBack()) 
        {
            webview.goBack();
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }   

    // Subject , body
    public void sendEmail( String subject , String body )
    {
        String[] params = new String[] { "http://www.problemio.com/problems/send_email_mobile.php", subject, body };

        SendEmail task = new SendEmail();
        task.execute(params);               
    }  


    //@Override 
    public void onPageFinished(WebView view, String url) 
    { 
        //super.onPageFinished(view, url); 
        view.clearCache(true); 
    }

    public void onBackPressed ( )
    {   
        final AlertDialog.Builder linkedin_builder = new AlertDialog.Builder(this);

             linkedin_builder.setMessage("" +
                    "Go back to the home screen?")
                .setCancelable(false)            
                .setNegativeButton("YES", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) 
                    {
                        if ( webview != null )
                        {
                            webview.destroy();
                        }

                        Intent myIntent = new Intent(YoutubeActivity.this, MainActivity.class);
                        YoutubeActivity.this.startActivity(myIntent);
                    }
                })              
                .setPositiveButton("NO", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) 
                    {
                        dialog.cancel();                  
                    }
                })
;
         AlertDialog alert = linkedin_builder.create();
         alert.show();      
    }


    @Override
    protected void onStart()
    {
        super.onStart();
        FlurryAgent.onStartSession(this, "4VYNFK3V6RCZ53CZ3J32");
    }    
}

Any thoughts on what might stop the audio from playing and what may be causing it? Thank you!

Upvotes: 37

Views: 32951

Answers (8)

Hassan Imtiaz
Hassan Imtiaz

Reputation: 117

The way I did it is by calling clearFocus for webview object. In my case I had fragments stacked up. So for the fragments not on top I called clearFocus for webview instances. It pauses the video for me.

Upvotes: 0

Sujith S Manjavana
Sujith S Manjavana

Reputation: 1586

  private void destroyWebView() {
        if (webView != null) {
            webView.clearHistory();
            webView.clearCache(false);
            webView.loadUrl("about:blank");
            webView.onPause();
            webView.removeAllViews();
            // webView.destroyDrawingCache();

            // NOTE: This pauses JavaScript execution for ALL WebViews,
            // do not use if you have other WebViews still alive.
            // If you create another WebView after calling this,
            // make sure to call mWebView.resumeTimers().
            // webView.pauseTimers();//adMob will fail to load if called
            webView.destroy();
            webView = null;
        }
    }

Upvotes: 0

Thiago
Thiago

Reputation: 13302

try this, hope it helps:

@Override
public void onPause() {
    myWebView.onPause();
    myWebView.pauseTimers();//this may cause adMob to stop working
    super.onPause();
}

@Override
public void onResume() {
    super.onResume();
    myWebView.resumeTimers();
    myWebView.onResume();
}


@Override
protected void onDestroy() {
    myWebView.destroy();
    myWebView = null;
    super.onDestroy();
}

Upvotes: 60

Jorgesys
Jorgesys

Reputation: 126455

You can do it using the method onPause() of your Activity :

@override
public void onPause() {
    super.onPause();
    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
        webview.onPause();
    }
}

adding a validation for use in API >= 11 (Honeycomb)

Upvotes: 3

xyz
xyz

Reputation: 3409

In activity's onDestroy() do:

@Override
protected void onDestroy() {
    super.onDestroy();
    webView.destroy();
}

Upvotes: 6

Yair Kukielka
Yair Kukielka

Reputation: 11406

Taken from https://stackoverflow.com/a/17690221/3032209:

You should call through to the WebView's onPause() and onResume() from your Activity's onPause() and onResume(), respectively.

Pauses any extra processing associated with this WebView and its associated DOM, plugins, JavaScript etc. For example, if this WebView is taken offscreen, this could be called to reduce unnecessary CPU or network traffic. When this WebView is again "active", call onResume().

Upvotes: 11

Kamal Kishore
Kamal Kishore

Reputation: 399

Nothing worked for me in some or all devices. This is the exact solution I guess. Worked for me well.

How to stop youtube video playing in Android webview?

alternatively for API >= 11 you can use _webview.onPause(); on the activity's / fragment's onPause

public void onPause() {
        // TODO Auto-generated method stub
        super.onPause();
        _webview.onPause();
}

Upvotes: 10

ndquangr
ndquangr

Reputation: 455

You should call:

webView.loadUrl("about:blank");

It will destroy all audio/video as well as Javasript objects and stop all running functions on webview

Upvotes: 30

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