I have an Activity in a FragmentActivity, which successfully loads a WebView. When the application is pushed to the background and recalled, the Activity is lost and the onResume of the FragmentActivity is called. Is there a way to keep the Activity up instead of it disappearing? Or is this because of the ProgressDialog displaying the result in the Webview?
The call to start the Activity looks like:
Bundle bundle = new Bundle();
bundle.putString("fieldKey", "");
bundle.putString("url", menu.getUrl());
Intent captureIntent = new Intent(LibraryListActivity.this, WebLinkActivity.class);
captureIntent.putExtras(bundle);
LibraryListActivity.this.startActivity(captureIntent);
The Activity itself:
public class WebLinkActivity extends Activity {
WebView mWebView;
private Button mCancel;
private String mUrl;
ProgressDialog progressDialog;
public void clearCookies() {
try {
android.webkit.CookieManager cookieManager = CookieManager.getInstance();
cookieManager.removeAllCookie();
} catch (Exception ex) {
}
}
public void closeWebLinkClick(View view) {
Utilities.logInfo("closeWebLinkClick", "Close WebLink Full Screen");
setResult(Activity.RESULT_CANCELED, null);
finish();
}
@Override
public void onResume() {
super.onResume();
}
@Override
protected void onPause() {
super.onPause();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setResult(Activity.RESULT_OK, null);
Bundle extras = getIntent().getExtras();
mUrl = extras.getString("url");
// Setup the web view. It will redirect to SSO site for login
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_weblink);
mCancel = (Button) findViewById(R.id.closeWebLink);
mCancel.setTextColor(Color.WHITE);
mWebView = (WebView) findViewById(R.id.weblinkViewer);
progressDialog = new ProgressDialog(WebLinkActivity.this);
progressDialog.setMessage("Loading...");
progressDialog.show();
// Link not provided
if (Utilities.stringIsBlank(mUrl)) {
String dataString = "<head><style type='text/css'>"
+ "body{margin:auto auto;text-align:center;vertical-align: middle;} </style></head>"
+ "<body><img src=\"invalid_link.png\"/></body>";
mWebView.loadDataWithBaseURL("file:///android_res/drawable/", dataString, "text/html", "utf-8", null);
if (progressDialog != null)
progressDialog.dismiss();
}
// Network is not available
else if (!Utilities.isNetworkAvailable()) {
String dataString = "<head><style type='text/css'>"
+ "body{margin:auto auto;text-align:center;vertical-align: middle;} </style></head>"
+ "<body><img src=\"not_connected.png\"/></body>";
mWebView.loadDataWithBaseURL("file:///android_res/drawable/", dataString, "text/html", "utf-8", null);
if (progressDialog != null)
progressDialog.dismiss();
}
// Normal processing
else {
// See if url is missing http. If so add it in
if (!mUrl.toLowerCase().contains("http")) {
mUrl = "http://" + mUrl;
}
// Most likely an image is ends with image attribute
if (Utilities.isImage(mUrl)) {
String html = "<html><body><img src=\"" + mUrl + "\" width=\"100%\"/></body></html>";
mWebView.loadData(html, "text/html", null);
if (progressDialog != null)
progressDialog.dismiss();
}
// Normal web view
else {
mWebView.setWebChromeClient(new WebChromeClient() {
public void onGeolocationPermissionsShowPrompt(String origin, GeolocationPermissions.Callback callback) {
// callback.invoke(String origin, boolean allow, boolean remember);
callback.invoke(origin, true, false);
}
});
mWebView.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
@Override
public void onPageFinished(WebView view, String url) {
if (progressDialog.isShowing()) {
progressDialog.dismiss();
}
}
});
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.getSettings().setAppCacheEnabled(true);
// HTML5 API flags
mWebView.getSettings().setAppCacheEnabled(true);
mWebView.getSettings().setDatabaseEnabled(true);
mWebView.getSettings().setDomStorageEnabled(true);
mWebView.loadUrl(mUrl);
}
}
}
}
Turns out this was a problem in the AndroidManifest.xml file. What I had:
<activity
android:name="com.mycompany.myapp.WebLinkActivity"
android:configChanges="orientation|keyboardHidden|screenSize|keyboard|navigation"
android:excludeFromRecents="true"
android:finishOnTaskLaunch="true"
android:label="Web Link"
android:noHistory="true">
</activity>
Whereas it should have been:
<activity
android:name="com.mycompany.myapp.WebLinkActivity"
android:configChanges="orientation|keyboardHidden|screenSize|keyboard|navigation" android:label="Web Link"
android:label="Web Link">
</activity>
The extra settings were causing the Activity to shutdown when the Application what pushed to the background.