I have a webview inside of a Fragment and when I click on a link it takes to to the next page, however clicking the back button does not take me back to the prior page. When I examine the canGoBack it is always false.
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
gameDetailsActivity = (GameDetailsActivity)getActivity();
Bundle args = getArguments();
int type = args.getInt(ARG_OBJECT);
View rootView = null;
rootView = inflater.inflate(R.layout.gamedetailswebview,
container, false);
wv = (WebView) rootView.findViewById(R.id.WebViewGameDetails);
wv.setWebViewClient(new WebViewClient());
wv.getSettings().setJavaScriptEnabled(true);
wv.getSettings().setPluginState(WebSettings.PluginState.ON_DEMAND);
wv.getSettings().setBuiltInZoomControls(true);
wv.getSettings().setSupportZoom(true);
wv.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
wv.getSettings().setAllowFileAccess(true);
wv.getSettings().setDomStorageEnabled(true);
switch (type)
{
case 1:
wv.loadUrl(gameDetailsActivity.gameSummaryURL);
break;
case 2:
wv.loadUrl(gameDetailsActivity.gameReportURL);
break;
}
return rootView;
}
public boolean GoBack()
{
if (wv.canGoBack())
{
wv.goBack();
return true;
}
return false;
}
#Override
public void onBackPressed()
{
int currentFragmentIndex = gameDetailsViewPager.getCurrentItem();
if (currentFragmentIndex > 0)
{
Fragment webview = gameDetailsPagerAdapter
.getItem(currentFragmentIndex);
if (webview instanceof GameDetailsWebViewFragment)
{
if (!((GameDetailsWebViewFragment) webview).GoBack())
{
super.onBackPressed();
}
}
}
}
I think instead of wv.setWebViewClient(new WebViewClient())
you should extend WebViewClient, override shouldOverrideUrlLoading(), like this
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
Related
public class PrimaryFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.primary_layout, container, false);
WebView heroespage = (WebView) rootView.findViewById(R.id.webView);
WebSettings webSettings = heroespage.getSettings();
webSettings.setJavaScriptEnabled(true);
heroespage.setWebViewClient(new MyBrowser());
heroespage.loadUrl("http://beritagresik.com");
return rootView;}
private class MyBrowser extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url ){
view.loadUrl(url);
return true;
}}}
This is sample my application, plis help for resolve this problem
thanks for ur help
If you open a web url in webview and inside is you open another link and so on.
now you want to come back by page , you can use webView.goBack();
Try out this code:
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (event.getAction() == KeyEvent.ACTION_DOWN) {
switch (keyCode) {
case KeyEvent.KEYCODE_BACK:
if (heroespage.canGoBack()) {
heroespage.goBack();
} else {
finish();
}
return true;
}
}
return super.onKeyDown(keyCode, event);
}
I created a WebView using Fragment; here is my code:
public class MyWebView extends Fragment {
private WebView webView;
#SuppressLint("SetJavaScriptEnabled")
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Bundle args = getArguments();
String url = args.getString("url");
webView = (WebView) getView().findViewById(R.id.webView);
webView.setWebViewClient(new MyBrowser());
WebSettings webSettings = webView.getSettings();
webSettings.setSaveFormData(true);
webSettings.setUseWideViewPort(true);
webSettings.setLoadWithOverviewMode(true);
webSettings.setSupportZoom(true);
webSettings.setBuiltInZoomControls(true);
webSettings.setLoadsImagesAutomatically(true);
webSettings.setJavaScriptEnabled(true);
webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
webView.loadUrl(url);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.web_view, container, false);
view.setOnKeyListener(new OnKeyListener() {
#Override
public boolean onKey( View v, int keyCode, KeyEvent event ) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
if (webView.canGoBack()) {
webView.goBack();
return true;
}
}
return false;
}
});
return view;
}
private class MyBrowser extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
}
I tried to override onBackPressed() but it seems not to work with Fragment. So I used setOnKeyListener() but it doesn’t work.
Can you tell me why the back button closes the app instead of going back to the previous web page?
The Fragment doesn't receive a callback of the OnBackPressed event. You'll have to make your Activity state aware when your fragment is displayed and communicate back and forth between the activity and the fragment.
You could make your code you're calling in on key a public boolean function for instance and if the fragment is present you interact with it, you continue to return true or false in a similar way which allows you to know on the activity if you should continue with it naturally if there are no more pages to go back.
Very good at all.
I have a fragment is called a drawerlist. Within this fragment I have a webView showing a web page.
I can surf the web, but the problem comes when I want to return to the previous page, and pulse on the back button.
The result I get is that pressing the back button, the application closes. And what I want is to return to the previous page.
Code fragment is as follows:
public class BClasesWebViewFragment extends Fragment {
private WebView webView;
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
WebSettings webSettings = this.webView.getSettings ();
webSettings . setJavaScriptEnabled ( true );
webSettings . setDomStorageEnabled ( true );
this . webView . setWebViewClient ( new WebViewClient ());
this . webView . setWebChromeClient ( new WebChromeClient ());
webSettings . setLoadWithOverviewMode ( true );
webSettings . setUseWideViewPort ( true );
webView.setInitialScale(1);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setLoadWithOverviewMode(true);
webView.getSettings().setUseWideViewPort(true);
webView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
webView.setScrollbarFadingEnabled(false);
webView.getSettings().setBuiltInZoomControls(true);
webView.loadUrl("http://google.com/");
webView.setDownloadListener(new DownloadListener() {
public void onDownloadStart(String url, String userAgent,
String contentDisposition, String mimetype,
long contentLength) {
Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(url));
startActivity(i);
}
});
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_bclases_webview, container, false);
webView = (WebView)view.findViewById(R.id.webViewBClases);
return view;
}
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.actionbar_menu, menu);
super.onCreateOptionsMenu(menu,inflater);
}
}
Thank you very much everyone.
I learned a lot on this site
Try this
webView.setOnKeyListener(new OnKeyListener()
{
#Override
public boolean onKey(View v, int keyCode, KeyEvent event)
{
if(event.getAction() == KeyEvent.ACTION_DOWN)
{
WebView webView = (WebView) v;
switch(keyCode)
{
case KeyEvent.KEYCODE_BACK:
if(webView.canGoBack())
{
webView.goBack();
return true;
}
break;
}
}
return false;
}
});
this will work perfectly.
I have literally looked at every question to do with getting the back button to work with a WebView inside a fragment and cannot seem to make it work in my case.
I am currently trying to get blackbelt's answer to work, but my app just closes once I have pressed the back button.
Any help would be great, thanks.
public class MainActivity extends BaseActivity {
private Fragment FragmentArchietecture = new FragmentShakira();
WebView webview;
private Fragment mContent;
public MainActivity() {
super(R.string.app_name);
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState != null)
mContent = getSupportFragmentManager().getFragment(
savedInstanceState, "mContent");
if (mContent == null)
mContent = new FragmentShakira();
setContentView(R.layout.content_frame);
getSupportFragmentManager().beginTransaction()
.replace(R.id.content_frame, FragmentArchietecture, "webby")
.commit();
setBehindContentView(R.layout.menu_frame);
getSupportFragmentManager().beginTransaction()
.replace(R.id.menu_frame, new RandomList()).commit();
ActionBar bar = getSupportActionBar();
bar.setTitle(R.string.app_name);
getSlidingMenu().setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN);
setSlidingActionBarEnabled(true);
}
#Override
public void onBackPressed() {
Fragment webview = getSupportFragmentManager().findFragmentByTag(
"webby");
if (webview instanceof FragmentShakira) {
boolean goback = ((FragmentShakira) webview).canGoBack();
if (!goback)
super.onBackPressed();
}
}
}
Fragment:
public class FragmentShakira extends SherlockFragment {
static WebView webview;
String TAG = "webby";
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater
.inflate(R.layout.fragmentwebview, container, false);
WebView webview = (WebView) view.findViewById(R.id.webView1);
webview.getSettings().setJavaScriptEnabled(true);
webview.setWebViewClient(new WebViewClient());
webview.loadUrl("https://www.google.co.uk/");
return view;
}
public boolean canGoBack() {
return webview != null && webview.canGoBack();
}
}
it should work. dont forget to pass on the message to the fragment to goback if it can
ie
if (!goback)
super.onBackPressed();
else
((FragmentShakira) view).goBack();
use the code posted by Nawrez here.
and here how you can implement it in your code.
in the onCreateView() method add this :
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater
.inflate(R.layout.fragmentwebview, container, false);
WebView webview = (WebView) view.findViewById(R.id.webView1);
webview.getSettings().setJavaScriptEnabled(true);
webview.setWebViewClient(new WebViewClient());
webview.loadUrl("https://www.google.co.uk/");
//handles the back navigation in the fragment
webView.canGoBack();
webView.setOnKeyListener(new View.OnKeyListener() {
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK
&& event.getAction() == MotionEvent.ACTION_UP
&& webView.canGoBack()) {
webView.goBack();
return true;
}
return false;
}
}); // until here
return view;
}
In Kotlin you can handle this easily by adding setOnKeyListener to your WebView.
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
val myWebView: WebView = view.findViewById(R.id.your_webView)
myWebView.webViewClient = WebViewClient()
myWebView.loadUrl("https://www.google.com/")
myWebView.setOnKeyListener { v, keyCode, event ->
if (keyCode == KeyEvent.KEYCODE_BACK && myWebView.canGoBack()) {
myWebView.goBack() // Navigate back to previous web page if there is one
nested_scroll.scrollTo(0, 0) // Scroll webview back to top of previous page
}
true
}
}
I created a small Android 4 application with fragments.
In all these fragments I have some webviews and if I click a different fragment I want a different website to load.
I have right now TabOne.java ; TabTwo.java ; TabThree.java and so on.
I was also wondering : Can I make this application without needing a TabOne.java, TabTwo.java and so on; only from MainActivity.java? I mean, to have a single WebView, and when clicking different Tabs, this WebView to load different Url (according to the selected Tab).
If this is not possible, can you tell me what is wrong here (TabOne.java) :
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
View view = inflater.inflate(R.layout.tabone, container, false);
myWebView = (WebView) view.findViewById(R.id.webview);
myWebView.getSettings().setPluginsEnabled(true);
myWebView.loadUrl("http://m.stirileprotv.ro");
myWebView = new WebView(getActivity());
myWebView.setOnKeyListener(new OnKeyListener(){
#Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && myWebView.canGoBack())
{
myWebView.goBack();
return true;
}
return false;
}
});
myWebView.setWebViewClient(new WebViewClient() {
#Override public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (Uri.parse(url).getHost().equals("m.stirileprotv.ro")) {
myWebView.loadUrl(url);
return true;
}
else
{
return false;
}
}
});
return view;
}
This is what i did.
In the fragment, declare the webview reference as static-
public static WebView mWebView;
public WebFragment() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v=inflater.inflate(R.layout.fragment_web, container, false);
mWebView = (WebView) v.findViewById(R.id.webview);
mWebView.loadUrl("https://google.com");
// Enable Javascript
WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
// Force links and redirects to open in the WebView instead of in a browser
mWebView.setWebViewClient(new WebViewClient());
return v;
}
public boolean canGoBack() {
return mWebView.canGoBack();
}
public void goBack() {
mWebView.goBack();
}
}
Now, In the parent activity -
#Override
public void onBackPressed() {
WebFragment fragment = new WebFragment();
if (fragment.mWebView.canGoBack()) {
fragment.mWebView.goBack();
} else {
super.onBackPressed();
}
}
What I did was implement it within the activity and then have a public static so:
In the main activity:
public class MainActivity extends FragmentActivity{
public static WebView myWebView;
...
#Override
public void onBackPressed() {
if (getSupportFragmentManager().findFragmentByTag("yourtag") != null) {
if(myWebView.canGoBack())
myWebView.goBack();
else {
super.onBackPressed();
}
}
else
super.onBackPressed();
}
...
}
and to reference it within the fragment:
MainActivity.myWebView = (WebView) getView().findViewById(R.id.webview);
and be sure when you create the fragment you add a tag
transaction.replace(R.id.yourfragid, newfragment, "yourtag");