Develop Reference

Android Studio : HTML5 Webapp to APK using webview, error your browser does not allow to be read local files

I'm trying to get my html5 webapp converted to apk using android studio. I'm able to compile it but i get the error your browser does not allow to be read local files.
the only permissions in my manifest are
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET" />
EDIT: I Can't seem to get the syntax correct
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.webkit.WebView;
import android.webkit.WebView;
public class MainActivity extends AppCompatActivity {
private WebView view;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
WebView view = (WebView) findViewById(R.id.WebView);
view.getSettings().setJavaScriptEnabled(true);
view.loadUrl("file:///android_asset/www/index.html");
}
}
i tried view.settings but that immediately throws an error
any ideas?

You have to explicitly allow it in the WebView.
Example.
webView.settings.allowFileAccess = true

view.getSettings().setAllowFileAccess(true);
view.getSettings().setAllowContentAccess(true);

WebView is clipping the webpage in android 4.4

WebView is clipping the webpage on Android 4.4. Here is how it looks:
It is opening correctly in google chrome. I want it to open like this in the webview.
Following is my code:
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<WebView
android:id="#+id/web_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
MainActivity.java
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.webkit.WebResourceError;
import android.webkit.WebResourceRequest;
import android.webkit.WebView;
import android.webkit.WebViewClient;
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.web_view);
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebViewClient(new WebViewClient());
webView.getSettings().setDomStorageEnabled(true);
webView.getSettings().setAllowContentAccess(true);
webView.getSettings().setAllowFileAccess(true);
webView.getSettings().setDatabaseEnabled(true);
webView.getSettings().setDomStorageEnabled(true);
webView .getSettings().setLoadWithOverviewMode(true);
webView .getSettings().setUseWideViewPort(true);
webView.loadUrl("https://viftbox.com/");
}
}

For using a recent WebView engine on Android and you can't use Android System WebView or Google Chrome:
Prior to Android 5.0 improvements to the Android WebView was limited to OS upgrades/updates. So the recommendation was to use the NOW DEPRECATED Crosswalk Project as the WebView. While the site no longer exists, its ghost exists on archive.org I don't know if enough of the site survives there to be useful. This might be a solution if you are unable to change hardware and need more recent webkit features.
As the Crosswalk Project is no longer updated, or it doesn't have the features you need, I've learned that Mozilla has a GeckoView which wraps their Gecko render engine.
Note that according to Mozilla's documentation they have their own APIs so GeckoView is NOT a drop-in replacement for Android's WebView, so some effort must be made for integration.
Either way including a custom webview engine will add to the APK size.

Android webview is not working in latest android version

I know that this question is ask many times in stackoverflow, but their solution is didnt work for me. Thats why I am asking this question.
Now the question is that I am developing an app by android webview, now this app is working perfect in older version of android version but didnt working in latest android version i.e. 9
I tried many things from other solution like
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setLoadWithOverviewMode(true);
webView.getSettings().setUseWideViewPort(true);
added this code in onCreate method but didnt work.
Another I try is add the #xml/network-security-config file but this also didnt work.
Here is my network-security-config code
<?xml version ="1.0" encoding ="utf-8"?>
<network-security-config>
<domain-config cleartextTrafficPermitted="true">
<domain>onlineawaz.in</domain>
</domain-config>
</network-security-config>
public class MainActivity extends AppCompatActivity {
WebView webView;
ProgressBar bar;
#SuppressLint("NewApi")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webView = (WebView) findViewById(R.id.webView2);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setLoadWithOverviewMode(true);
webView.getSettings().setUseWideViewPort(true);
bar =(ProgressBar) findViewById(R.id.progressBar2);
webView.loadUrl("http://onlineawaz.in/");
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebViewClient(new myWebClient());
}
public class myWebClient extends WebViewClient{
//page event
}
}

Try adding below code in the AndroidManifest.xml under application tag
android:usesCleartextTraffic="true"
tools:ignore="UnusedAttribute"
First-line will allow you to use HTTP URLs(Not recommended in Pie). The second line is used to ignore the warning for SDK less than 23.

Problem with webview not loading

I am having a bad experience with webview which does not load the web page which I request.
I cannot load google or any other page with a webview. I have put in xml:
<WebView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/webview"
android:layout_marginLeft="250px"
android:layout_marginTop="80px"
android:layout_width="180px"
android:layout_height="160dip"
/>
I then put in the code:
mWebView = (WebView) findViewById(R.id.webview);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.loadUrl("http://www.google.com");
This shows up stating the webpage is not available.
I have also added the permission to the manifest.
I have another activity within this application which loads a youtube url fine using:
startActivity(new Intent( Intent.ACTION_VIEW,
Uri.parse("http://www.youtube.com/watch?v=XS998HaGk9M")));// Starts an intent to watch the video
I'm not sure what this could be and really need advice on this as I need to get it working.
Thanks
Edit: I also cannot access any webpage within the actual emulator itself. By searching in the search bar within the emulator this says the same thing when connecting to Google.
I'm not sure why this would connect to youtube with an intent and not a webview
Edit: This is not even connecting to youtube now, it says the same as above. This is messed up as I need this to work for my project tomorrow. If the webview keeps going down this is not very reliable. I may have to change the device I'm working with as with android things keep going wrong.
Edit: I have just come back after a few hours without touching the code or the emulator and when I run the application the youtube video was back on and I can browse within the emulator. But I still cannot connect via webview. VERY UNRELIABLE :(

Make sure you have included Permissions for Internet Access
<uses-permission android:name="android.permission.INTERNET" />

I had the same problem. It seems to be solved when putting the webview code elsewhere than in the MainActivity.onCreate() method . For example, put the code containing webview.loadUrl(…) into the onClick method of a button. The WebView appears empty on launching the activity, and correctly filled when clicking the button .

Does the emulator have internet access? I have noticed similar behavior within the emulator at times and it is due to the emulator not starting up properly. The only work-a-round I've been able to come up with is to restart the emulator until it has internet access (usually one or two times).
-Dan

package com.Example.Browser;
import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.webkit.WebSettings;
import android.webkit.WebSettings.PluginState;
import android.webkit.CookieManager;
import android.webkit.WebView;
import android.webkit.WebSettings.RenderPriority;
import android.webkit.WebViewClient;
public class MainActivity extends Activity {
private WebView mWebView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
CookieManager.getInstance().setAcceptCookie(true);//Enable Cookies
mWebView = (WebView) findViewById(R.id.webView1);
mWebView.getSettings().setJavaScriptEnabled(true);//Enable Java Script
mWebView.setWebViewClient(new HelloWebViewClient());
mWebView.loadUrl("http://www.google.com/"); //Set Home page
mWebView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);//Remove ScrollBars
mWebView.getSettings().setDefaultFontSize(12);//Set Font Size
mWebView.getSettings().setLoadsImagesAutomatically(true);//Enable Image Loading
mWebView.getSettings().setPluginState(PluginState.ON);//Enable Flash
mWebView.getSettings().setRenderPriority(RenderPriority.HIGH); //improves Feedback on touch
//mWebView.setBackgroundColor(0x00000000);//Transparent Screen When Loading
//mWebView.getSettings().setBuiltInZoomControls(true);//Set Zoom Controls
//mWebView.getSettings().setDisplayZoomControls(false);//Always Hide Zoom Controlls(Requires Api 11)
mWebView.getSettings().setAppCacheMaxSize(1024*1024*8);//Set Cache (8mb)
String appCachePath = getApplicationContext().getCacheDir().getAbsolutePath();//Set Cache (8mb)
mWebView.getSettings().setAppCachePath(appCachePath);//Set Cache (8mb)
mWebView.getSettings().setAllowFileAccess(true);//Set Cache (8mb)
mWebView.getSettings().setAppCacheEnabled(true);//Set Cache (8mb)
mWebView.getSettings().setCacheMode(WebSettings.LOAD_DEFAULT);//Set Cache (8mb)
mWebView.requestFocus(View.FOCUS_DOWN);//Enable WebView Interaction
//mWebView.setWebViewClient(new WebViewClient() {//Open URL on Error
//public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {//Open URL on Error
//mWebView.loadUrl("http://www.google.com");//Open URL on Error
//mWebView.loadUrl("file:///android_asset/error_404.jpg"); //Show Offline HTML file or Image on Error
// }
// });
}
private class HelloWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView webview, String url)
{
webview.loadUrl(url);
return true;
}
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack())
{
mWebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<WebView
android:id="#+id/webView1"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>

Disable address bar in Android webview

How do disable and hide the address bar from a WebView?

There is no address bar in a WebView.
If you think you have a WebView, and you see an address bar, that is not your WebView. Rather, you are looking at the Browser application. Most likely, the URL you told the WebView to load did a redirect, and you did not intercept that redirect using a WebViewClient and shouldOverrideURLLoading().

Adding myView.setWebViewClient(new WebViewClient()); disabled the address bar for me.
import android.webkit.WebView;
import android.webkit.WebViewClient;
...
WebView myView = findViewById(R.id.myExampleView);
myView.setWebViewClient(new WebViewClient());
myView.getSettings().setJavaScriptEnabled(true);
myView.loadUrl("https://www.stackoverflow.com");
XML Snippet
<WebView android:id="#+id/myExampleView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:keepScreenOn="true"
android:gravity="center" />
source: (Japanese site):
http://www.techdoctranslator.com/android/webapps/webview

Finally I Try with this. Its worked for me..
Here is the working code
private WebView webview ;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_ebook);
//webview use to call own site
webview =(WebView)findViewById(R.id.webView);
webview.setWebViewClient(new WebViewClient());
webview .getSettings().setJavaScriptEnabled(true);
webview .getSettings().setDomStorageEnabled(true);
webview.loadUrl("http://www.google.com");
}
and your entire main.xml(res/layout) look should like this:
<WebView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/webView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
don't go to add layouts.

webview.setWebViewClient(new WebViewClient());
solved the problem for me..

Kotlin code as following
myWebView.setWebViewClient(WebViewClient())