Develop Reference

How to provide access to video source to an Android webview app?

I'm embedding a website that uses video source from a device to classify certain objects. I am using Android Studio and Webview for embedding the website but I'm getting stuck in reading the video source from the app. Below is the code that I've used so far.
MainActivity.java
package com.example.xxx;
import android.os.Bundle;
import android.webkit.PermissionRequest;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import com.example.xxx.R;
import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {
String websiteURL = "https://smartphone.edgeimpulse.com/classifier.html?apiKey=ei_c728c47b9eeeaf5604fb4d666a5a48e2813513647e75d9ab322fe16f867a6f92"; // sets web url
private WebView webview;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Webview stuff
webview = findViewById(R.id.webView);
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setDomStorageEnabled(true);
webview.setOverScrollMode(WebView.OVER_SCROLL_NEVER);
webview.loadUrl(websiteURL);
webview.setWebChromeClient(new WebChromeClient() {
#Override
public void onPermissionRequest(final PermissionRequest request) {
request.grant(request.getResources());
}
});
}}
AndroidManifest.xml
<?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="com.example.edgeimpulse">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.CAPTURE_VIDEO_OUTPUT" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<application
android:allowBackup="true"
android:dataExtractionRules="#xml/data_extraction_rules"
android:fullBackupContent="#xml/backup_rules"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/Theme.EdgeImpulse"
tools:targetApi="31">
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Here is the error I'm getting:
Can someone help me out with this?

Fragment webView for Button (to call or dial a number) [Android Studio]

I have successfully added a WebView to a fragment, to load a website. However, some elements on the website, such as a button, link to a tel= scheme, resulting in an err_unknown_url_scheme error when pressed. How can I support this?
This is my code:
fragment_notification.xml
android:layout_width="match_parent"
android:layout_height="match_parent">
<WebView
android:layout_width="match_parent"
android:id="#+id/webView3"
android:layout_height="match_parent">
</WebView>
NotificationsFragment.java
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import com.alidmisli.gcsdriver.R;
public class NotificationsFragment extends Fragment {
public NotificationsFragment() {
}
public View onCreateView(#NonNull LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_notifications, container, false );
WebView webView= (WebView)v.findViewById(R.id.webView3);
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebViewClient(new WebViewClient());
webView.loadUrl("http://gcs-bn.com/sos.html/");
return v;
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.alidmisli.gcsdriver">
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
<uses-permission android:name="android.permission.CALL_PHONE" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity
android:name=".MainActivity"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

Set webviewclient like this
webView.setWebViewClient(new CustomWebViewClient());
String TELPREFIX = "tel:"
class CustomWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if(url.startsWith(TELPREFIX)) {
Intent intent = new Intent(Intent.ACTION_DIAL);
intent.setData(Uri.parse(url));
startActivity(intent);
return true;
}
return super.shouldOverrideUrlLoading(view, url);
}
}

Android local storage

I have a problem with a webview which may access to the localStorage by app. My index.html informs that local storage is'nt supported by my browser (ie. the webview). If you have any suggestion.. Please take a look at my code :
Activity.java:
package com.exercise.AndroidHTML;
import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebSettings;
import android.webkit.WebView;
public class AndroidHTMLActivity extends Activity {
WebView myBrowser;
;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
myBrowser = (WebView)findViewById(R.id.mybrowser);
myBrowser.loadUrl("file:///android_asset/index.html");
WebSettings webSettings = myBrowser.getSettings();
//enable JavaScript in webview
webSettings.setJavaScriptEnabled(true);
//Enable and setup JS localStorage
webSettings.setDomStorageEnabled(true);
webSettings.setDatabaseEnabled(true);
}
}
AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.exercise.AndroidHTML"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="4" />
<application android:icon="#drawable/icon" android:label="#string/app_name">
<activity android:name=".AndroidHTMLActivity"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

setDatabasePath() method was deprecated in API level 19. I advise you to use storage locale like this:
webView.getSettings().setDomStorageEnabled(true);
webView.getSettings().setDatabaseEnabled(true);
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
webView.getSettings().setDatabasePath("/data/data/" + webView.getContext().getPackageName() + "/databases/");
}

You may have to set the database path:
webView.getSettings().setDatabasePath("/data/data/" + webView.getContext().getPackageName() + "/databases/");

how to mopub ads add in application

i want to add ads banner in my application i have integrate mopub sdk with my project and import and add library to the my project now my question is how to add banner disply and where code i have to write in my application java code and xml code about ads so please help enyone
my java code and mainifest file code is given below
mainactivity.java
package com.example.ration;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;
public class MainActivity extends Activity {
private WebView web;
int k;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
web=(WebView)findViewById(R.id.web);
web.getSettings().setJavaScriptEnabled(true);
web.setWebViewClient(new WebViewClient());
web.getSettings().setBuiltInZoomControls(true);
web.loadUrl("http://dcs-dof.gujarat.gov.in/live-info.htm");
// web.getProgress();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
menu.add(0,1,menu.NONE,"About");
menu.add(0,2,menu.NONE,"Feedback");
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id=item.getItemId();
if(id == 1)
{
Toast.makeText(MainActivity.this,"About",Toast.LENGTH_LONG).show();
Intent i=new Intent(MainActivity.this,about.class);
startActivity(i);
}
else {
Toast.makeText(MainActivity.this,"Feedback",Toast.LENGTH_LONG).show();
Intent i2 =new Intent(MainActivity.this,feedback.class);
startActivity(i2);
}
return super.onOptionsItemSelected(item);
}
private boolean doubleBackToExitPressedOnce = false;
#Override
protected void onResume() {
super.onResume();
// .... other stuff in my onResume ....
this.doubleBackToExitPressedOnce = false;
}
#Override
public void onBackPressed() {
if (doubleBackToExitPressedOnce) {
super.onBackPressed();
return;
}
this.doubleBackToExitPressedOnce = true;
Toast.makeText(this,"Press Again to Exit", Toast.LENGTH_SHORT).show();
}
}
and my manifest file is
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.ration"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />
<application
android:allowBackup="true"
android:icon="#drawable/icon"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.ration.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name="com.example.ration.about"></activity>
<activity android:name="com.example.ration.feedback"></activity>
<activity android:name="com.mopub.mobileads.MoPubActivity" android:configChanges="keyboardHidden|orientation"/>
<activity android:name="com.mopub.mobileads.MraidActivity" android:configChanges="keyboardHidden|orientation"/>
<activity android:name="com.mopub.mobileads.MraidBrowser" android:configChanges="keyboardHidden|orientation"/>
<activity android:name="com.mopub.mobileads.MraidVideoPlayerActivity" android:configChanges="keyboardHidden|orientation"/>
<activity android:name="com.google.ads.AdActivity" android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" />
<activity android:name="com.millennialmedia.android.MMActivity" android:theme="#android:style/Theme.Translucent.NoTitleBar" android:configChanges="keyboardHidden|orientation|keyboard" />
<activity android:name="com.millennialmedia.android.VideoPlayer" android:configChanges="keyboardHidden|orientation|keyboard" />
</application>
</manifest>

I think you should better go through the guide for Mopub Banner Ads Integration which explains you the steps of banner ads integration.
Hope this will help you.

Use view in XML file
<com.mopub.mobileads.MoPubView
android:id="#+id/mrect_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal"
android:layout_weight="1" />
in activity Load code
pass id of view in below function ,unit id of ur app,and keywords of cataogry of ads
public void loadMoPubView(MoPubView moPubView, String adUnitId, String keywords) {
if (moPubView == null) {
Utils.logToast(LockScreenActivity.this, "Unable to inflate MoPubView from xml.");
//Toast.makeText(this, "Unable to inflate MoPubView from xml.", Toast.LENGTH_SHORT).show();
return;
}
try {
Utils.validateAdUnitId(adUnitId);
} catch (IllegalArgumentException exception) {
Utils.logToast(LockScreenActivity.this, exception.getMessage());
return;
}
moPubView.setBannerAdListener(this);
moPubView.setAdUnitId(adUnitId);
moPubView.setKeywords(keywords);
moPubView.setAutorefreshEnabled(true);
moPubView.loadAd();
}

Android SecurityException ACCESS_WIFI_STATE

I am building an Android app that uses wifi.
I have properly declared these uses permissions in the manifest, however for some reason the app is throwing a SecurityException that causes the app to force-close.
I traced the cause of the security exception in LogCat to the system saying it doesn't have the access_wifi_state permission. This is strange and confusing to me because I have already declared it in the manifest.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="android.wifi"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission android:name="ACCESS_WIFI_STATE" />
<uses-permission android:name="CHANGE_WIFI_STATE" />
<uses-feature android:name="android.hardware.wifi" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-sdk android:minSdkVersion="8" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name="android.wifi.AndroidWiFiActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
And here is the code that causes the exception:
package android.wifi;
import android.app.Activity;
import android.content.Context;
import android.net.wifi.WifiManager;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.Button;
import android.widget.TextView;
import android.wifi.R;
public class AndroidWiFiActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TextView tv = (TextView) findViewById(R.id.textbox);
tv.setText("ABC 123");
WifiManager wifiMgr = (WifiManager) getSystemService(Context.WIFI_SERVICE);
if(wifiMgr.isWifiEnabled())
{
tv.append("Wifi is enabled");
}
else
{
tv.append("Wifi is disabled");
}
}
}
Any help is greatly appreciated. Thanks.

The permission is:
android.permission.ACCESS_WIFI_STATE