I'm following (Building Web Apps in WebView) tutorial, but I have problem with (Navigating web page history) I'm runing it on my device and I click on a link but when I click the back button the application shuts down:
That's my activity:
public class MainActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
WebView myWebView = (WebView) findViewById(R.id.webView1);
myWebView.setWebViewClient(new MyWebViewClient());
myWebView.setWebViewClient(new WebViewClient());
WebSettings webSettings = myWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
myWebView.loadUrl("http://www.google.com");
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
private class MyWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (Uri.parse(url).getHost().equals("www.example.com")) {
// This is my web site, so do not override; let my WebView load the page
return false;
}
// Otherwise, the link is not for a page on my site, so launch another Activity that handles URLs
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
return true;
}
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
WebView myWebView = null;
// Check if the key event was the Back button and if there's history
if ((keyCode == KeyEvent.KEYCODE_BACK) && myWebView.canGoBack()) {
myWebView.goBack();
return true;
}
// If it wasn't the Back key or there's no web page history, bubble up to the default
// system behavior (probably exit the activity)
return super.onKeyDown(keyCode, event);
}
}
public class MainActivity extends Activity {
WebView myWebView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myWebView = (WebView) findViewById(R.id.webView1);
myWebView.setWebViewClient(new MyWebViewClient());
myWebView.setWebViewClient(new WebViewClient());
WebSettings webSettings = myWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
myWebView.loadUrl("http://www.google.com");
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
private class MyWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (Uri.parse(url).getHost().equals("www.example.com")) {
// This is my web site, so do not override; let my WebView load the page
return false;
}
// Otherwise, the link is not for a page on my site, so launch another Activity that handles URLs
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
return true;
}
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
// Check if the key event was the Back button and if there's history
if ((keyCode == KeyEvent.KEYCODE_BACK) && myWebView.canGoBack()) {
myWebView.goBack();
return true;
}
// If it wasn't the Back key or there's no web page history, bubble up to the default
// system behavior (probably exit the activity)
return super.onKeyDown(keyCode, event);
}
Related
I have created a webview app of my site in Android Studio. Could someone please look into the code and solve the issue. This is my code:
public class MainActivity extends AppCompatActivity {
private WebView webView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webView = findViewById(R.id.webView);
webView.setWebViewClient(new WebViewClient(){
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url == null || url.startsWith("http://") || url.startsWith("https://")) return false;
try {
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
view.getContext().startActivity(intent);
return true;
} catch (Exception e) {
return true;
}
}
});
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setDomStorageEnabled(true);
webView.loadUrl("https://xyz.in/admin_login.php");
}
public void onBackPressed(){
if(webView.canGoBack()){
webView.goBack();
}else{
super.onBackPressed();
}
}
When WhatsApp icon is clicked, it's opening in WhatsApp application,but when view location is clicked, the button is not responding. Please help on this issue.
Please find the attached image for your reference
It opens my link in Webview but when I try to open hyperlinks and content of the web or navigation link, it starts opening with the default browser.
public class MainActivity extends Activity {
private WebView mWebView;
#SuppressLint("SetJavaScriptEnabled")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mWebView = findViewById(R.id.activity_main_webview);
mWebView.setWebViewClient(new WebViewClient());
WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
mWebView.loadUrl("http://");
}
#Override
public void onBackPressed() {
if(mWebView.canGoBack()) {
mWebView.goBack();
} else {
super.onBackPressed();
}
}
}
class MyWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (Objects.requireNonNull(Uri.parse(url).getHost()).endsWith("http://www.ieltsmadeeasy.tk/")) {
return false;
}
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
view.getContext().startActivity(intent);
return true;
}
}
I want to browse the whole website inside the web view, not any browser please help me
Here is some documentation about WebViews: https://developer.android.com/guide/webapps/webview#java
The problem is, that you don't override the shouldOverrideUrlLoading(view, url) function of the WebViewClient, as you use the default one.
If you use this as the WebViewClient, it should work (copied from examples in documentation):
private class MyWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (Uri.parse(url).getHost().equals("https://www.example.com")) {
// This is my website, so do not override; let my WebView load the page
return false;
}
// Otherwise, the link is not for a page on my site, so launch another Activity that handles URLs
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
return true;
}
}
So, just take this class and change the line mWebView.setWebViewClient(new WebViewClient()); to mWebView.setWebViewClient(new MyWebViewClient());
How can an options menu item be accessed from an object outside of the menu itself? I'm trying to set an alpha value for one of the options menu items, but it's not working for some reason. The commented lines are what I tried.
I've seen the following code used before, but it's not clear on where and how it should be used:
Drawable drawable = item.getIcon();
if (drawable != null) {
drawable.mutate();
drawable.setAlpha(1);
}
Activity class
public class WebviewActivity extends AppCompatActivity {
private static final String TAG = WebviewActivity.class.getSimpleName();
WebView myWebView;
ProgressBar myProgressBar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_webview);
}
#Override
protected void onStart() {
super.onStart();
setContentView(R.layout.fragment_webview);
String url = getIntent().getStringExtra("url");
myWebView = findViewById(R.id.web_view);
myWebView.setWebViewClient(new WebViewClient());
WebSettings webSettings = myWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
myWebView.loadUrl(url);
myWebView.setWebChromeClient(new WebChromeClient() {
#Override
public void onProgressChanged(WebView view, int newProgress) {
super.onProgressChanged(view, newProgress);
myProgressBar.setProgress(newProgress);
}
});
}
private class WebViewClient extends android.webkit.WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request){
String url=request.getUrl().toString();
view.loadUrl(url);
return true;
}
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
}
}
public void onBtnBackPressed() {
if (myWebView.canGoBack()){
myWebView.goBack();
} else {
onBackPressed();
}
}
public void onBtnForwardPressed() {
if (myWebView.canGoForward()){
myWebView.goForward();
} else {
// menu.getItem(R.id.action_webbrowser_forward).setEnabled(false);
// menu.getItem(R.id.action_webbrowser_forward).mutate();
// menu.getItem(R.id.action_webbrowser_forward).setAlpha(1);
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.web_browser, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
else if (item.getItemId() == R.id.action_webbrowser_back) {
onBtnBackPressed();
} else if (item.getItemId() == R.id.action_webbrowser_forward) {
onBtnForwardPressed();
}
return super.onOptionsItemSelected(item);
}
}
Define in your activity class this variable:
MenuItem action_webbrowser_forward;
In onCreateOptionsMenu() after the inflation of the menu, write this:
action_webbrowser_forward = menu.findItem(R.id.action_webbrowser_forward);
then you can use it anywhere in your class:
action_webbrowser_forward.setEnabled(false);
but mutate is used for drawables and not menu items, so get the icon of the item by action_webbrowser_forward.getIcon() and apply mutate to it.
Try passing MenuItem reference on your onBtnForwardPressed function parameters :
#Override
public boolean onOptionsItemSelected(MenuItem item) {
else if (item.getItemId() == R.id.action_webbrowser_back) {
onBtnBackPressed();
} else if (item.getItemId() == R.id.action_webbrowser_forward) {
onBtnForwardPressed(item);
}
return super.onOptionsItemSelected(item);
}
And :
public void onBtnForwardPressed(MenuItem menuItem) {
if (myWebView.canGoForward()){
myWebView.goForward();
} else {
menuItem.setEnabled(false);
menuItem.getIcon().setAlpha(50);
}
}
Hope this helps
Okay I spend couple of hour to get this solution.apparently you can get menuitem from your toolbar. So in my case.
var menuItem = toolbar.menu;
Now to get specfic item from menu item
favIcon = menuItem.findItem(R.id.favourite);
Note: favIcon is MenuItem declare global
Now if you can do whatever you want to do for this icon
eg. to make it invisible
favIcon?.isVisible=false
I have a WebView app and would like to add a splash screen to show either while loading the page, or for a set amount of time. I have tried some other solutions but could not find one that worked. If necessary to know, my splash image is splash.png, located in the drawable folder.
Here is my MainActivity.java
public class MainActivity extends Activity {
private GoogleApiClient client;
#Override
public void onBackPressed()
{
WebView webView = (WebView) findViewById(R.id.webView);
if(webView.canGoBack()){
webView.goBack();
}
if (doubleBackToExitPressedOnce) {
super.onBackPressed();
return;
}
this.doubleBackToExitPressedOnce = true;
Toast.makeText(this, "Tap Twice To Exit", Toast.LENGTH_SHORT).show();
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
doubleBackToExitPressedOnce=false;
}
}, 2000);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
WebView view = (WebView) this.findViewById(R.id.webView);
view.getSettings().setJavaScriptEnabled(true);
view.setWebViewClient(new MyBrowser());
client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();
if(isNetworkStatusAvialable (getApplicationContext())) {
view.loadUrl("file:///android_asset/index.html");
} else {
view.loadUrl("file:///android_asset/error.html");
}
}
public static boolean isNetworkStatusAvialable (Context context) {
ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivityManager != null)
{
NetworkInfo netInfos = connectivityManager.getActiveNetworkInfo();
if(netInfos != null)
if(netInfos.isConnected())
return true;
}
return false;
}
#Override
public void onStart() {
super.onStart();
client.connect();
Action viewAction = Action.newAction(
Action.TYPE_VIEW,
"MLINKS",
Uri.parse("http://host/path"),
Uri.parse("android-app://PACKAGE-NAME/http/host/path")
);
AppIndex.AppIndexApi.start(client, viewAction);
}
#Override
public void onStop() {
super.onStop();
Action viewAction = Action.newAction(
Action.TYPE_VIEW,
"MLINKS",
Uri.parse("http://host/path"),
Uri.parse("android-app://PACKAGE-NAME/http/host/path")
);
AppIndex.AppIndexApi.end(client, viewAction);
client.disconnect();
}
private class MyBrowser extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
boolean doubleBackToExitPressedOnce = false;
}
Thank you for any help!
EDIT:
Define a Progress Dialog:
private ProgressDialog pd;
Then inside your:
view.setWebViewClient(new MyBrowser() {
Insert this:
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
pd.show();
}
#Override
public void onPageFinished(WebView view, String url) {
pd.dismiss();
}
I did something like this at one time. IIRC, it went like this:
First, I created a special ImageView subclass that overrode onTouchEvent() and threw away all the events.
Then for my layout, I had my ImageView subclass overlay the WebView then made it hidden, like this (for example):
<FrameLayout
...
>
<WebView
...
/>
<com.example.TouchHandlerImageView
....
android:src="R.drawable.splash"
android:visibility="gone"
/>
....
</FrameLayout>
Then my code went like this:
Show the splash imageview. (The onTouchEvent() would keep touch events from going through to the WebView underneath)
Start the page loading (In my case, I also had to run some javascript to set up the page)
In WebViewClient onPageFinshed(), hide the splash imageview, displaying the WebView with page fully loaded.
at first thing make a background and show it im main screen till the data is being ready.
use AsyncTask Class because it has 3 methods which them
1- onPreExecute() //don't do anything here
2- doInBackgroundProcess()// fetch your data here
3- onPostExecute()//get back the original background
First i will paste my code.
public class ZSEEActivity extends TabActivity {
private WebView webview ;
private WebView webviewtwo;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final Activity activity = this;
TabHost mTabHost = getTabHost();
mTabHost.addTab(mTabHost.newTabSpec("tab_test1").setIndicator("Zastępstwa").setContent(R.id.tab1));
mTabHost.addTab(mTabHost.newTabSpec("tab_test2").setIndicator("Plan Lekcji").setContent(R.id.tab2));
mTabHost.addTab(mTabHost.newTabSpec("tab_test3").setIndicator("O programie").setContent(R.id.tab3));
mTabHost.setCurrentTab(0);
webview = (WebView) findViewById(R.id.webView1);
webviewtwo = (WebView) findViewById(R.id.webView2);
WebSettings webviewtwoSettings = webviewtwo.getSettings();
if (savedInstanceState != null){
webview.restoreState(savedInstanceState);
webviewtwo.restoreState(savedInstanceState);
}
else{
webview.loadUrl("http://zsee.bytom.pl/ogloszenia.php");
webviewtwoSettings.setDefaultFontSize(30);
webviewtwo.loadUrl("http://zsee.bytom.pl/plany/index.html");
}
webview.setWebViewClient(new WebViewClient() {
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
String summary = "<html><body><meta http-equiv=\"Content-Type\" content=\"text/html;charset=utf-8\" ><center>Coś się zepsuło :(</center></body></html>";
webview.loadData(summary, "text/html","utf-8");
Toast.makeText(activity, "O nie! " + description, Toast.LENGTH_SHORT).show();
}
});
webviewtwo.setWebViewClient(new WebViewClient() {
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
String summary = "<html><body><meta http-equiv=\"Content-Type\" content=\"text/html;charset=utf-8\" ><center>Coś się zepsuło :(</center></body></html>";
webviewtwo.loadData(summary, "text/html","utf-8");
Toast.makeText(activity, "O nie! " + description, Toast.LENGTH_SHORT).show();
}
});
}
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return true;
}
protected void onSaveInstanceState(Bundle outState, Bundle Test) {
webview.saveState(outState);
webviewtwo.saveState(Test);
}
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.item1:
AlertDialog alertdialog= new AlertDialog.Builder(this).create();
alertdialog.setTitle("Pomoc");
alertdialog.setMessage("Lepszy Planer od Sierran'a :>");
alertdialog.show();
return true;
case R.id.item2:
finish();
case R.id.item3:
webview.loadUrl("http://zsee.bytom.pl/ogloszenia.php");
System.out.print("ss");
default:
return super.onOptionsItemSelected(item);
}
}
}
Now is my question. I have two webview widget. One is called webview and another webviewtwo. I'm newbie in android programing so i have problem how save two widgets in onSaveInstanceState and how restore them. Now webviewtwo overwrite webview and in webview windows i have page from webviewtwo. How fix it and do it right ?
Sierran
It's my understanding that onSaveInstanceState should be used to persist any dynamic state information needed to rebuild the application. You wouldn't want to persist the actual widget but rather the information that the widget needs to restore itself.
onSaveInstanceState takes only one Bundle.
Save the webview states into separate Bundles, then put them into the saved one:
Bundle state1=new Bundle();
webview.saveState(state1);
Bundle state2=new Bundle();
webviewtwo.saveState(state2);
outState.putBundle("state1",state1);
outState.putBundle("state2",state2);
super.onSaveInstanceState(outState);
Restoring:
webview.restoreState(savedInstanceState.getBundle("state1"));
webviewtwo.restoreState(savedInstanceState.getBundle("state2"));