Develop Reference

How to handle multiple deeplinks for android app

I have created an Android app. Whenever someone opens the website through the app, it goes to the exact link. But if the user opens another link, the app is still on the previous opened link. You can check the app here: https://play.google.com/store/apps/details?id=app.freeairdrop.io
Send these 2 link to yourself on Telegram, or Whatsapp:
https://freeairdrop.io/airdrop/morpher.html
https://freeairdrop.io/airdrop/simbcoin.html
Now open the first link in my app, when prompted to choose application. Switch back to Telegram/whatsapp, and click on second link. My app will open, but it's still on that page(first link).Nothing happens, the app is not able to load second link, unless app is closed.
MainActivity.java code:
package app.freeairdrop.io;
import...
public class MainActivity extends Activity{
private ProgressBar progressBar;
private WebView webView;
private SwipeRefreshLayout mySwipeRefreshLayout;
private boolean mShouldPause;
#SuppressLint("SetJavaScriptEnabled")
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
progressBar.setMax(100);
webView = (WebView) findViewById(R.id.webView);
webView.setWebViewClient(new WebViewClientDemo());
webView.setWebChromeClient(new WebChromeClientDemo());
mySwipeRefreshLayout = (SwipeRefreshLayout) this.findViewById(R.id.swipeContainer);
mySwipeRefreshLayout.setOnRefreshListener(
new SwipeRefreshLayout.OnRefreshListener() {
#Override
public void onRefresh() {
webView.reload();
mySwipeRefreshLayout.setRefreshing(false);
}
}
);
// ATTENTION: This was auto-generated to handle app links.
Intent appLinkIntent = getIntent();
String appLinkAction = appLinkIntent.getAction();
Uri appLinkData = appLinkIntent.getData();
if (getIntent().getExtras() != null) {
if (appLinkData == null){
webView.loadUrl("https://freeairdrop.io/");
}else
webView.loadUrl(String.valueOf(appLinkData));
} else if (getIntent().getExtras() == null){
webView.loadUrl("https://freeairdrop.io/");
}webView.reload();
}
private class WebViewClientDemo extends WebViewClient {
#Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
Toasty.error(getApplicationContext(), "No Internet, pull down to refresh when you're connected to internet", Toast.LENGTH_LONG, true).show();
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
Uri uri = Uri.parse(url);
if (uri.getHost() != null && (url.startsWith("https://freeairdrop.io/") || url.startsWith("https://www.freeairdrop.io/"))) {
return false;
}
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
view.getContext().startActivity(intent);
return true;
}
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
progressBar.setVisibility(View.GONE);
progressBar.setProgress(100);
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
progressBar.setVisibility(View.VISIBLE);
progressBar.setProgress(0);
}
}
private class WebChromeClientDemo extends WebChromeClient {
public void onProgressChanged(WebView view, int progress) {
progressBar.setProgress(progress);
}
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) {
webView.goBack();
return true;
}
else {
}
return super.onKeyDown(keyCode, event);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
return true;
}
#Override
// This method is used to detect back button
public void onBackPressed() {
if (this.webView.canGoBack()) {
this.webView.goBack();
return;
}
else {
// Let the system handle the back button
super.onBackPressed();
}
}
}
AndroidManifest Code:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="app.freeairdrop.io">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<application
android:appCategory="productivity"
android:hardwareAccelerated="true"
android:allowBackup="true"
android:fullBackupContent="true"
android:icon="#mipmap/ic_launcher"
android:roundIcon="#mipmap/ic_launcher_round"
android:label="#string/app_name"
android:theme="#style/AppTheme"
android:name=".ApplicationClass"
tools:ignore="GoogleAppIndexingWarning">
<activity
android:name="app.freeairdrop.io.MainActivity"
android:label="#string/app_name"
android:configChanges="orientation|screenSize|screenLayout"
android:resizeableActivity="false"
android:supportsPictureInPicture="false"
android:launchMode="singleInstance"
>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter android:autoVerify="true">
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data
android:scheme="https"
android:host="freeairdrop.io" />
</intent-filter>
</activity>
</application>
</manifest>

Setting android:launchMode="singleInstance" to the activity will cause only one instance of that activity to run. Meaning when your activity has been opened once via deeplink that instance is running. When you open the second link you expect your UI to get updated but since the instance was still running the activity's onCreate does not get called, which is why you see the views from earlier link.( Another point is when singleInstance is set it won't allow any other activity in stack.)
You can get more info in the official docs .
Now, even though onCreate is never called but onResume and onNewIntent methods do get called when singleInstance is set. Though onNewIntent is usually mentioned to work with singleTop, from my experience it does get called on when any of the three single flags are set.
So you need to override either of the two and write the code to update your UI in these. Also note that onResume does get called when your activity is created the very first time after onCreate so if that's where you place the code you might want to optimize to avoid reloading the same thing twice and everytime onResume gets called like after returning from background. In which case onNewIntent() does seem like a better option.
Hope this was of some help to you.
Update: As requested, you can find the edited code below
package app.freeairdrop.io;
import...
public class MainActivity extends Activity{
private ProgressBar progressBar;
private WebView webView;
private SwipeRefreshLayout mySwipeRefreshLayout;
private boolean mShouldPause;
#SuppressLint("SetJavaScriptEnabled")
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
progressBar.setMax(100);
webView = (WebView) findViewById(R.id.webView);
webView.setWebViewClient(new WebViewClientDemo());
webView.setWebChromeClient(new WebChromeClientDemo());
mySwipeRefreshLayout = (SwipeRefreshLayout) this.findViewById(R.id.swipeContainer);
mySwipeRefreshLayout.setOnRefreshListener(
new SwipeRefreshLayout.OnRefreshListener() {
#Override
public void onRefresh() {
webView.reload();
mySwipeRefreshLayout.setRefreshing(false);
}
}
);
// call your method here to manage the intent
manageIntent(getIntent());
}
/* Simply moved your code which handles the intent to a common method
* Call this method from onCreate so that when first instance of activity gets created it handles it
* Similarly call it from onNewIntent to manage the new link you get
* You just need to pass the respective intents from the methods
*/
public void manageIntent(Intent intent) {
// ATTENTION: This was auto-generated to handle app links.
Intent appLinkIntent = intent;
String appLinkAction = appLinkIntent.getAction();
Uri appLinkData = appLinkIntent.getData();
if (getIntent().getExtras() != null) {
if (appLinkData == null){
webView.loadUrl("https://freeairdrop.io/");
}else
webView.loadUrl(String.valueOf(appLinkData));
} else if (getIntent().getExtras() == null){
webView.loadUrl("https://freeairdrop.io/");
}
}
// override to get the new intent when this activity has an instance already running
#Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
// again call the same method here with the new intent received
manageIntent(intent);
}
private class WebViewClientDemo extends WebViewClient {
#Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
Toasty.error(getApplicationContext(), "No Internet, pull down to refresh when you're connected to internet", Toast.LENGTH_LONG, true).show();
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
Uri uri = Uri.parse(url);
if (uri.getHost() != null && (url.startsWith("https://freeairdrop.io/") || url.startsWith("https://www.freeairdrop.io/"))) {
return false;
}
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
view.getContext().startActivity(intent);
return true;
}
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
progressBar.setVisibility(View.GONE);
progressBar.setProgress(100);
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
progressBar.setVisibility(View.VISIBLE);
progressBar.setProgress(0);
}
}
private class WebChromeClientDemo extends WebChromeClient {
public void onProgressChanged(WebView view, int progress) {
progressBar.setProgress(progress);
}
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) {
webView.goBack();
return true;
}
else {
}
return super.onKeyDown(keyCode, event);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
return true;
}
#Override
// This method is used to detect back button
public void onBackPressed() {
if (this.webView.canGoBack()) {
this.webView.goBack();
return;
}
else {
// Let the system handle the back button
super.onBackPressed();
}
}
}
See if this works for you and let me know.

Android Deep Linking not opening the required link

I want to associate my website (https://freeairdrop.io) with my app, such that when anyone gets a link to my website, it should prompt user to open the link in app(if installed) or open in browser(if app not installed)
This is AndroidManifest.xml file:
<intent-filter android:autoVerify="true">
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data
android:scheme="https"
android:host="freeairdrop.io" />
</intent-filter>
MyActivity.java file
package app.freeairdrop.io;
import android.annotation.SuppressLint;
import....
public class MainActivity extends Activity{
private ProgressBar progressBar;
private WebView webView;
private SwipeRefreshLayout mySwipeRefreshLayout;
#SuppressLint("SetJavaScriptEnabled")
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
progressBar.setMax(100);
webView = (WebView) findViewById(R.id.webView);
webView.setWebViewClient(new WebViewClientDemo());
webView.setWebChromeClient(new WebChromeClientDemo());
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
webView.getSettings().setPluginState(WebSettings.PluginState.ON);
webView.getSettings().setMediaPlaybackRequiresUserGesture(false);
webView.loadUrl("https://freeairdrop.io/");
mySwipeRefreshLayout = (SwipeRefreshLayout) this.findViewById(R.id.swipeContainer);
mySwipeRefreshLayout.setOnRefreshListener(
new SwipeRefreshLayout.OnRefreshListener() {
#Override
public void onRefresh() {
webView.reload();
mySwipeRefreshLayout.setRefreshing(false);
}
}
);
// ATTENTION: This was auto-generated to handle app links.
Intent appLinkIntent = getIntent();
String appLinkAction = appLinkIntent.getAction();
Uri appLinkData = appLinkIntent.getData();
}
private class WebViewClientDemo extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
Uri uri = Uri.parse(url);
if (uri.getHost() != null && (url.startsWith("https://freeairdrop.io/") || url.startsWith("https://www.freeairdrop.io/"))) {
return false;
}
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
view.getContext().startActivity(intent);
return true;
}
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
progressBar.setVisibility(View.GONE);
progressBar.setProgress(100);
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
progressBar.setVisibility(View.VISIBLE);
progressBar.setProgress(0);
}
}
private class WebChromeClientDemo extends WebChromeClient {
public void onProgressChanged(WebView view, int progress) {
progressBar.setProgress(progress);
}
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) {
webView.goBack();
return true;
}
else {
// finish();
}
return super.onKeyDown(keyCode, event);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
return true;
}
#Override
// This method is used to detect back button
public void onBackPressed() {
if (this.webView.canGoBack()) {
this.webView.goBack();
return;
}
Builder dialog = new Builder(this);
// dialog.setTitle((CharSequence) "Exit App");
dialog.setMessage((CharSequence) "Do You Want To Exit The App ?");
dialog.setPositiveButton((CharSequence) "YES", (OnClickListener) new OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
MainActivity.this.finish();
}
});
dialog.setCancelable(false);
dialog.setNegativeButton((CharSequence) "CANCEL", (OnClickListener) new OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
}).show();
}
}
By adding link through link assistant, whenever I click on sub links of my website (https://freeairdrop.io/airdrop/discoin.html), it prompts the user to open link in app, but it just opens the homepage(https://freeairdrop.io).

Deeplinking is pretty simple to do.
Grab the intent inside of your Activity, get the data from the intent, load it into the website.
Intent intent = getIntent();
Uri data intent.getData();
webview.loadURL(data);
This isnt tested, you may have to add your url before the data.
webview.loadURL("URL_HERE" + data);

Reduce the time of displaying progress bar in WebView

I have problem with reducing the time of displaying progress bar in WebView. For underesting a add image. enter image description here.
Where I can implement some thread of something to stop showing progress bar for one second, while my web running in WebView?
I tried implement thread before showing progress bar in onPageStarted, but it waiting for whole loading page, not only for loading progress bar.
We have very slow loading on web page, so we need showing to users one or two second loading page in webview without progressbar, after this time show "loading" progress bar.
If you have question, please ask me, we need quick respond to resolve this problem. I'm trying to find some solution, but nothing.
Thanks a lot!
There is my ChromeClien.class
public class MyWebChromeClient extends WebChromeClient {
private ProgressListener mListener;
public MyWebChromeClient(ProgressListener listener) {
mListener = listener;
}
#Override
public void onProgressChanged(WebView view, int newProgress) {
mListener.onUpdateProgress(newProgress);
super.onProgressChanged(view, newProgress);
}
public interface ProgressListener {
public void onUpdateProgress(int progressValue);
}}
There is MainActivity.class
public class MainActivity extends AppCompatActivity{
private WebView webview;
ProgressDialog prDialog;
String cekani;
#SuppressLint("SetJavaScriptEnabled")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
CookieManager.getInstance().setAcceptCookie(true);
Boolean isFirstRun = getSharedPreferences("PREFERENCE", MODE_PRIVATE)
.getBoolean("isFirstRun", true);
if (isFirstRun) {
//show start activity
startActivity(new Intent(MainActivity.this, PrvniSpusteni.class));
}
getSharedPreferences("PREFERENCE", MODE_PRIVATE).edit()
.putBoolean("isFirstRun", false).commit();
if(KontrolaInternetu.isInternetAvailable(MainActivity.this)) //Vrátí hodnotu TRUE, pokud je připojení k internetu k dispozici
{
webview =(WebView)findViewById(R.id.webView);
//Nastavení webové stránky
webview.loadUrl(getString(R.string.url_aplikace));
webview.setWebViewClient(new MyWebViewClient());
//Puštění JavaScriptu pro web
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
webview.getSettings().setDomStorageEnabled(true);
webview.getSettings().setUseWideViewPort(true);
webview.setOverScrollMode(WebView.OVER_SCROLL_NEVER);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
WebSettings ws = webview.getSettings();
ws.setJavaScriptEnabled(true);
ws.setAllowFileAccess(true);
if (android.os.Build.VERSION.SDK_INT >= 21) {
CookieManager.getInstance().setAcceptThirdPartyCookies(webview, true);
}else {
CookieManager.getInstance().setAcceptCookie(true);
}
webview.setWebChromeClient(new WebChromeClient(){
#TargetApi(Build.VERSION_CODES.LOLLIPOP)
#Override
public void onPermissionRequest(final PermissionRequest request) {
request.grant(request.getResources());
}
});
if (Build.VERSION.SDK_INT>=Build.VERSION_CODES.ECLAIR) {
try {
Log.d(TAG, "Enabling HTML5-Features");
Method m1 = WebSettings.class.getMethod("setDomStorageEnabled", new Class[]{Boolean.TYPE});
m1.invoke(ws, Boolean.TRUE);
Method m2 = WebSettings.class.getMethod("setDatabaseEnabled", new Class[]{Boolean.TYPE});
m2.invoke(ws, Boolean.TRUE);
Method m3 = WebSettings.class.getMethod("setDatabasePath", new Class[]{String.class});
m3.invoke(ws, "/data/data/" + getPackageName() + "/databases/");
Method m4 = WebSettings.class.getMethod("setAppCacheMaxSize", new Class[]{Long.TYPE});
m4.invoke(ws, 1024*1024*8);
Method m5 = WebSettings.class.getMethod("setAppCachePath", new Class[]{String.class});
m5.invoke(ws, "/data/data/" + getPackageName() + "/cache/");
Method m6 = WebSettings.class.getMethod("setAppCacheEnabled", new Class[]{Boolean.TYPE});
m6.invoke(ws, Boolean.TRUE);
Log.d(TAG, "Enabled HTML5-Features");
}
catch (NoSuchMethodException e) {
Log.e(TAG, "Reflection fail", e);
}
catch (InvocationTargetException e) {
Log.e(TAG, "Reflection fail", e);
}
catch (IllegalAccessException e) {
Log.e(TAG, "Reflection fail", e);
}
}
}
else
{
//Zobrazení AlertDialogu pokud není připojení k internetu
runOnUiThread(new Runnable() {
#Override
public void run() {
if (!isFinishing()){
new AlertDialog.Builder(MainActivity.this)
.setTitle(getString(R.string.no_internet))
.setMessage(getString(R.string.internet))
.setCancelable(false)
.setIcon(R.drawable.icon)
.setPositiveButton(getString(R.string.ok), new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
finish();
System.exit(0);
}})
.setNegativeButton(getString(R.string.zrusit), new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
}})
.show();
}
}
});
}
}
//Při stisknutí tlačítka zpět se uživatel vrátí ve webview nazpět bez toho, aby aplikace spadla.
private final String TAG = MainActivity.class.getSimpleName();
// Progress bar - zobrazí se tehdy, pokud čekám na načítání stránky
private class MyWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
prDialog = new ProgressDialog(MainActivity.this);
prDialog.setIcon(R.drawable.icon);
prDialog.setMessage(getString(R.string.nacitani_webove_stranky));
prDialog.show();
}
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
if(prDialog!=null){
prDialog.dismiss();
}
}
}
//Při stisknutí tlačítka zpět se uživatel dostane zpět pouze ve webview
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if(event.getAction() == KeyEvent.ACTION_DOWN){
switch(keyCode)
{
case KeyEvent.KEYCODE_BACK:
if(webview.canGoBack() == true){
webview.goBack();
}else{
finish();
}
return true;
}
}
return super.onKeyDown(keyCode, event);
}
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.endsWith(".mp3")) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse(url), "audio/*");
view.getContext().startActivity(intent);
return true;
} else if (url.endsWith(".mp4") || url.endsWith(".3gp")) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse(url), "video/*");
view.getContext().startActivity(intent);
return true;
} else {
return true;
}}}

Hey bro, you don't necessarily need to implement threads for your
requirement. Firstly you can load the url in the webview and after a
particular time period you can start displaying progress bar. For
calling the progress bar after certain time period you can use
Handler.
private class MyWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
#Override
public void run() {
//Do something after 100ms
prDialog = new ProgressDialog(MainActivity.this);
prDialog.setIcon(R.drawable.icon);
prDialog.setMessage(getString(R.string.nacitani_webove_stranky));
prDialog.show();
}
}, 100);
}
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
if(prDialog!=null){
prDialog.dismiss();
}
}

How to Handle WebView in Android 4.2 and 4.1

My Webview works in android 4.4.4 and higher.How can I handle it in all android devices?!
I mean I tried many ways to show PaymentGateWay in Webview but it`s just shown url address in webview page(Cant Load Url).how can I do it with this code?
WebSettings webSetting = wv.getSettings();
webSetting.setJavaScriptEnabled(true);
webSetting.setJavaScriptCanOpenWindowsAutomatically(true);
final JavaScriptInterface JavaScriptInterface = new JavaScriptInterface(WebViewPaymentByBankActivity.this);
wv.addJavascriptInterface(JavaScriptInterface, "Android");
//webView.setWebChromeClient(new MyWebChromeClient());
//webView.getSettings().setSupportMultipleWindows(true);
//webSetting.setPluginState(WebSettings.PluginState.ON);
//webSetting.setPluginState(WebSettings.PluginState.ON_DEMAND);
//webSetting.setDomStorageEnabled(true);
webSetting.setCacheMode(WebSettings.LOAD_NO_CACHE);
webSetting.setAppCacheEnabled(true);
wv.setWebChromeClient(new WebChromeClient() {
public boolean onJsAlert(WebView view, String url, String message, final android.webkit.JsResult result) {
//Toast.makeText(WebViewPaymentByBankActivity.this, message, Toast.LENGTH_LONG).show();
result.confirm();
return true;
}
public void onProgressChanged(WebView view, int progress) {
activity.setProgress(progress * 1000);
if (progress == 100) {
}
}
});
wv.setWebViewClient(new WebViewClient() {
#JavascriptInterface
#Override
public boolean shouldOverrideUrlLoading(WebView view, String urlNewString) {
if (!loadingFinished) {
redirect = true;
}
loadingFinished = false;
wv.loadUrl(urlNewString);
url_result = urlNewString;
uri = Uri.parse(url_result);
String[] result = url_result.split("://");
protocol = result[0];
host = result[1];
if (protocol.equals("inapp")) {
if (host.equals("Error")) {
Intent intent = new Intent(WebViewPaymentByBankActivity.this,PaymentActivity.class);
startActivity(intent);
WebViewPaymentByBankActivity.this.finish();
}
else if (host.equals("Success")) {
Constants.ck_pay=true;
BasketFragment.sum = 0;
BasketFragment.txt_view_badge.setText("");
BasketFragment.txt_view_badge.setVisibility(View.GONE);
PaymentActivity.txt_view_pay_total.setText("0");
PaymentActivity.txt_view_pay_payable.setText("0");
WebViewPaymentByBankActivity.this.finish();
}
}
return false;
}
#Override
public void onPageFinished(WebView view, String url) {
if (!redirect) {
loadingFinished = true;
}
if (loadingFinished && !redirect) {
//HIDE LOADING IT HAS FINISHED
} else {
redirect = false;
}
super.onPageFinished(view, url);
view.clearCache(true);
}
#Override
#JavascriptInterface
public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
super.onReceivedSslError(view, handler, error);
handler.proceed();
}
});
}
public class JavaScriptInterface {
Context mContext;
/**
* Instantiate the interface and set the context
*/
JavaScriptInterface(Context c) {
mContext = c;
}
/**
* Show a toast from the web page
*/
#JavascriptInterface
public void paymentResponse(String toast) {
Toast.makeText(mContext, toast, Toast.LENGTH_SHORT).show();
}
}
#Override
#JavascriptInterface
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)) {
wv.goBack();
Intent intent = new Intent(WebViewPaymentByBankActivity.this, PaymentActivity.class);
startActivity(intent);
WebViewPaymentByBankActivity.this.finish();
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)
Intent intent = new Intent(WebViewPaymentByBankActivity.this, PaymentActivity.class);
startActivity(intent);
WebViewPaymentByBankActivity.this.finish();
return super.onKeyDown(keyCode, event);
}

Webview email link (mailto)

I have a view and view the site has malito code to send email.
When I open the link opens in an error.
I want that when I open the link opens Gmail app or another email application.
Thanks to all helpers.
public class teacher extends Activity implements OnClickListener {
WebView webView;
final Activity activity = this;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
setContentView(R.layout.teacher);
webView = (WebView) findViewById(R.id.webView145);
webView.getSettings().setJavaScriptEnabled(true); webView.loadUrl("https://dl.dropboxusercontent.com/u/233211/%D7%A8%D7%A9%D7%99%D7%95%D7%9F/iWebKit%20demo/ther.html");
webView.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
activity.setTitle("Loading...");
activity.setProgress(progress * 100);
if (progress == 100)
activity.setTitle(R.string.app_name);
} });
webView.setWebViewClient(new WebViewClient() {
#Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
// Handle the error
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true; } });}
public void onBackPressed() {
if (webView.canGoBack()) {
webView.goBack();
} else {
Intent B = new Intent(this, MainActivity.class);
startActivity(B);
}}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (event.getAction() == KeyEvent.ACTION_DOWN) {
switch (keyCode) {
case KeyEvent.KEYCODE_BACK:
if (webView.canGoBack() == true) {
webView.goBack();
} else {
finish();
}return true;} }
return super.onKeyDown(keyCode, event);
}
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
}}

You have to create a subclass of WebViewClient and override mailto URL loading. Example:
public class MyWebViewClient extends WebViewClient {
private final WeakReference<Activity> mActivityRef;
public MyWebViewClient(Activity activity) {
mActivityRef = new WeakReference<Activity>(activity);
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.startsWith("mailto:")) {
final Activity activity = mActivityRef.get();
if (activity != null) {
MailTo mt = MailTo.parse(url);
Intent i = newEmailIntent(activity, mt.getTo(), mt.getSubject(), mt.getBody(), mt.getCc());
activity.startActivity(i);
view.reload();
return true;
}
} else {
view.loadUrl(url);
}
return true;
}
private Intent newEmailIntent(Context context, String address, String subject, String body, String cc) {
Intent intent = new Intent(Intent.ACTION_SEND);
intent.putExtra(Intent.EXTRA_EMAIL, new String[] { address });
intent.putExtra(Intent.EXTRA_TEXT, body);
intent.putExtra(Intent.EXTRA_SUBJECT, subject);
intent.putExtra(Intent.EXTRA_CC, cc);
intent.setType("message/rfc822");
return intent;
}
}
Then you have to set this custom WebViewClient to your WabView:
webView.setWebViewClient(new MyWebViewClient(activity);

You should update your's WebViewClient with the following:
#SuppressWarnings("deprecation")
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
proceedUrl(view, Uri.parse(url))
return true;
}
#TargetApi(Build.VERSION_CODES.N)
#Override
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
proceedUrl(view, request.getUrl());
return true;
}
private void proceedUrl(View view, Uri uri){
if (uri.toString().startsWith("mailto:")) {
startActivity(new Intent(Intent.ACTION_SENDTO, uri));
} else if (uri.toString().startsWith("tel:")) {
startActivity(new Intent(Intent.ACTION_DIAL, uri));
} else {
view.loadUrl(uri.toString());
}
}

Note : - After Android Nougat shouldOverrideUrlLoading is Deprecated
You need to use shouldOverrideUrlLoading along with shouldOverrideUrlLoading for better support.
Also, you might want to check if URL have mailto: or tel:, which are used in HTML5 to trigger mail client and phone dial respectively.
A complete solution will look like this now
#SuppressWarnings("deprecation")
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.startsWith("mailto:")) {
//Handle mail Urls
startActivity(new Intent(Intent.ACTION_SENDTO, Uri.parse(url)));
} else if (url.startsWith("tel:")) {
//Handle telephony Urls
startActivity(new Intent(Intent.ACTION_DIAL, Uri.parse(url)));
} else {
view.loadUrl(url);
}
return true;
}
#TargetApi(Build.VERSION_CODES.N)
#Override
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
final Uri uri = request.getUrl();
if (uri.toString().startsWith("mailto:")) {
//Handle mail Urls
startActivity(new Intent(Intent.ACTION_SENDTO, uri));
} else if (uri.toString().startsWith("tel:")) {
//Handle telephony Urls
startActivity(new Intent(Intent.ACTION_DIAL, uri));
} else {
//Handle Web Urls
view.loadUrl(uri.toString());
}
return true;
}