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I've got an activity with a webview. Looks like the webview does not get destroyed along with the activity. To demonstrate, I've created an html page which runs a timer that loads an image resource every few seconds. The script continues executing after the activity is destroyed:
public class MyWebViewActivity extends Activity {
private WebView mWebView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.the_layout);
mWebView = (WebView)findViewById(R.id.webview);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.getSettings().setBuiltInZoomControls(true);
mWebView.setWebViewClient(new EmbeddedWebViewClient());
mWebView.loadUrl("test url");
}
private class EmbeddedWebViewClient extends WebViewClient {
@Override
public void onLoadResource(WebView view, String url) {
super.onLoadResource(view, url);
if (Config.DEBUG) { Log.v(TAG, "onLoadResource(): " + url); }
}
}
}
So the above just prints a log statement whenever onLoadResource() is called. Here's the javascript in the test html page:
<html>
<head>
<script type="text/javascript">
function load() {
setInterval("doit()", 3000);
}
function doit() {
Image1 = new Image(150, 20);
Image1.src = "abc_" + Math.floor(Math.random()*100) + ".png";
}
</script>
</head>
<body onload="load()">
</body>
</html>
The above just creates an image resource on the timer interval to trigger the onLoadResource() method in EmbeddedWebViewClient().
So yeah I can see in LogCat that the messages keep printing after leaving the activity. Do we have to shut down the WebView somehow? Maybe this is the issue described here:
http://code.google.com/p/android/issues/detail?id=9375
if it's a known issue should it have been documented in the api docs?
Note: Running this on android 2.3.4, Nexus S.
Thanks
303
If you have only 1 activity you can simply start the service and then call finish() on the activity. However, if you have multiple activities you have to make sure that you close them all (see also this post).
Add a close button and on its click set: webview. setVisibility(View. INVISIBLE); webview.
Bookmark this question. Show activity on this post. Instead of going back to the previous page, the app is closed when pressed the back button...
This interface was deprecated in API level 12. This interface is now obsolete.
This solution worked for me:
In MyActivity.java file, I added:
@Override
protected void onDestroy() {
webview.destroy();
webview = null;
super.onDestroy();
}
You're probably looking for the pauseTimers() and resumeTimers() calls. If you add this to your activity I think it'll start doing what you expect:
public void onResume() {
super.onResume();
if (mWebView != null) {
mWebView.resumeTimers();
}
}
public void onPause() {
super.onPause();
if (mWebView != null) {
mWebView.pauseTimers();
}
}
The logcat messages stop when you swap away from the app and start back up when you return.
41
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