Develop Reference

Open new tabs on default browser when using webview

I want to tell you I never try android development before, and this is the first time I'm doing an android app I build a website using ASP.NET and I want to run that site within the android app web view.
So followed a few tutorials and I did so far.
Here when I redirect to some external sites In my site, I open them on another new tab on the browser, here I want to open it on the mobile phone's default browser instead of the opening inside the web view.
need a help to doing that.
This is my app MainActivity code.
public class MainActivity extends AppCompatActivity {
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());
webView.loadUrl("http://www.mycustom:5500/test/");
WebSettings websettings = webView.getSettings();
websettings.setJavaScriptEnabled(true);
}
private class MyWebView extends WebViewClient {
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
return super.shouldOverrideUrlLoading(view, request);
}
}
#Override
public void onBackPressed() {
if (webView.isFocused() && webView.canGoBack()){
webView.goBack();
}else{
super.onBackPressed();
}
}
}

How can I block ad/popup/domain

How can I block ad/popup/domain
Hello, I'm making a simple webview and I would like that in this webview I could limit which domains my user can access, for example, I would like only google.com and youtube.com to be accessed, how can I do this?
Is this the best way to block popup and advertisement?
public class MainActivity extends AppCompatActivity {
WebView wv;
public void onBackPressed(){
if(wv.canGoBack()){
wv.goBack();
}else{
super.onBackPressed();
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
wv = (WebView) findViewById(R.id.webView);
//Enable Javascript
wv.getSettings().setJavaScriptEnabled(true);
wv.setFocusableInTouchMode(true);
// set Render Priority to high
wv.getSettings().setRenderPriority(WebSettings.RenderPriority.HIGH);
wv.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
wv.getSettings().setDomStorageEnabled(true);
wv.getSettings().setAppCacheEnabled(true);
wv.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
// Load url
wv.loadUrl("https://www.google.com/");
wv.setWebViewClient(new myWebViewClient());
}
String currentUrl;
private class myWebViewClient extends WebViewClient{
#Override
public void onLoadResource(WebView view, String url) {
Log.e("Resource ",url);
}
}
}

Before calling loadUrl, just perform checks on the String. If it is anything other than you want, display something like a snackbar with the message

How to get url after loading page in webview

I need to take url after loading a web page in my web view to check condition and if I use onPageFinished() method, then where to use.

Just set a webview client and override onpagefinished as shown below
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
WebView webView = findViewById(R.id.webview);
webView.loadUrl("http://www.google.com");
webView.setWebViewClient(new WebViewClient(){
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
Toast.makeText(getApplicationContext(), url,Toast.LENGTH_LONG).show();
}
});
}
}
inside onpagefinished you have the url

WebView fails to load webpage

I have a WebView trying to load a WebPage like this:
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_web);
wv=(WebView)findViewById(R.id.webview);
WebSettings ws=wv.getSettings();
ws.setJavaScriptEnabled(true);
wv.loadUrl("http://pro39.blutechnologies.com/crimes.aspx");
}
I have added the internet permission to the manifest
<uses-permission android:name="android.permission.INTERNET"/>
However the WebView is blank,it neither throws an error nor loads the web-page.How do I load webpages like this,I have only tried loading local html files before and I would like to know if I have to do something different.

Try like this way:
mWebView.loadUrl("http://pro39.blutechnologies.com/crimes.aspx");
mWebView.setWebViewClient(new HelloWebViewClient());
private class HelloWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
Use this code .shouldOverrideUrlLoading() not use compulsary.use this code and please reply me this code work or not

Try below code.
public class Main extends Activity {
private WebView mWebview ;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_web);
mWebview = (WebView)findViewById(R.id.webview);
mWebview.getSettings().setJavaScriptEnabled(true); // enable javascript
final Activity activity = this;
mWebview.setWebViewClient(new WebViewClient() {
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
Toast.makeText(activity, description, Toast.LENGTH_SHORT).show();
}
});
mWebview .loadUrl("http://pro39.blutechnologies.com/crimes.aspx");
setContentView(mWebview );
}
}

Android WebView zoom out after page is loaded

I have an initialized WebView with the following code:
_webView.setWebViewClient(new WebViewClient() {
#Override
public void onPageFinished(WebView view, String url) {
while (view.zoomOut());
}
_webView.loadURL("path/to/image.png");
But this does not work. The WebView zooms out while loading. But when it is finished, it will zoom in.
Is there any other way to zoom out completely after a page (I use the WebView to display an image) is loaded?

Try this piece of code:
public class WebViewSampleActivity extends Activity
{
WebView wb;
private class HelloWebViewClient extends WebViewClient
{
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url)
{
return false;
}
}
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
wb=(WebView)findViewById(R.id.webView1);
wb.getSettings().setJavaScriptEnabled(true);
wb.getSettings().setLoadWithOverviewMode(true);
wb.getSettings().setUseWideViewPort(true);
wb.getSettings().setBuiltInZoomControls(true);
wb.getSettings().setPluginState(WebSettings.PluginState.ON);
wb.getSettings().setPluginsEnabled(true);
wb.setWebViewClient(new HelloWebViewClient());
wb.loadUrl("http://www.foofoo.com");
}
}
Hope this helps.

Don't do anything in onPageFinished() instead use webview.getSettings().setDefaultZoom(WebviewSetting.ZoomDensity.FAR);
Hope this helps

These are the two most important commands when loading images:
webView.getSettings().setLoadWithOverviewMode(true);
webView.getSettings().setUseWideViewPort(true);