Android local storage

Android local storage - android

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/");

Related

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?

Android app for a responsive web site crashes on load up on real phone

This is my first attempt at Android coding. We have a responsive web site and I call myself writing the code for an android app so that people and simply click on the icon after downloading the app and hit our website. On the Simulator, the app works fine on the various test phone, but when I upload APK for distribution and someone downloads and tries to run it, it crashes even before the splash screen is seen. Can some one please look at my code and tell me what's wrong. It seems to only crash on Android software version 6.0 or higher. On the old phones and tablets it run fine. Here are copies of my "SplashScreenActivity.java, my MainActivity.java, and my AndroidManifest.xml from Android Studios version 3.2.1. Any help would be appreciated.
SplashScreenActivity.java
package com.wastefreemail.wfmconnect;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;
public class SplashScreenActivity extends AppCompatActivity {
private int SLEEP_TIMER = 3;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_splash_screen);
getSupportActionBar().hide();
LogoLauncher logoLauncher = new LogoLauncher();
logoLauncher.start();
}
private class LogoLauncher extends Thread{
public void run(){
try{
sleep(1000 * SLEEP_TIMER);
}catch(InterruptedException e){
e.printStackTrace();
}
Intent intent = new Intent(SplashScreenActivity.this, MainActivity.class);
startActivity(intent);
SplashScreenActivity.this.finish();
}
}
}
MainActivit.java
package com.wastefreemail.wfmconnect;
import android.app.Activity;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class MainActivity extends Activity {
public WebView web1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
WebView web1 = (WebView)findViewById(R.id.web1);
WebSettings webSettings = web1.getSettings();
webSettings.setJavaScriptEnabled(true);
web1.loadUrl("https://www.wastefreemail.com");
web1.setWebViewClient(new WebViewClient());
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.wastefreemail.wfmconnect">
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<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">
</activity>
<activity android:name=".SplashScreenActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

try this,
manifest file
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.chetan.testapp">
<uses-permission android:name="android.permission.INTERNET"/>
<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">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
MainActivity.java
package com.wastefreemail.wfmconnect;
import android.app.Activity;
import android.os.Bundle;
import android.view.Window;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class MainActivity extends Activity {
public WebView web1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
web1 = (WebView)findViewById(R.id.webView);
WebSettings webSettings = web1.getSettings();
webSettings.setJavaScriptEnabled(true);
web1.loadUrl("http://www.wastefreemail.com/");
web1.setWebViewClient(new WebViewClient());
}
}
xml
<WebView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/webView"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
Hope it's help full.

Looks like there may be a problem in your splashscreen activity. Try below code and let me know for further updates.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_splash_screen);
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
Intent intent = new Intent(SplashScreenActivity.this,MainActivity.class);
startActivity(intent);
finish();
}
},5000); //here 5000 represents 5 seconds. Change this according to your need.
}
Edit
If even that doesn't work then make a new style in your styles.xml file.
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
And apply this style to your activity in your manifest.xml file.
<activity
android:name=".SplashScreenActivity"
android:theme="#style/AppTheme.NoActionBar" />
EDIT
That SupportActionBar method is throwing a Null Pointer exception. Use this code in your splash activity. It will resolve the issue.
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_splash_screen);
try{
getSupportActionBar().hide();
} catch (NullPointerException e){
e.printStackTrace();
}

on rotate mobile webview refresh hide menu

i have a problem i am create an app web view to get and website on play store.
the problem is that it have a dropdown Menu html5+jquery+css3. when i rotate the smartphone, the web are refreshed.
this my code Android Studio 3.0:
Activity xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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="com.icarosnet.icarosnetsa.IcarosWeb">
<WebView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/wv"
/>
</android.support.constraint.ConstraintLayout>
Main.Java
package com.icarosnet.icarosnetsa;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class IcarosWeb extends AppCompatActivity {
WebView wv ;
#Override
public void onBackPressed(){
if(wv.canGoBack()){
wv.goBack();
}else{
super.onBackPressed();
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_icaros_web);
wv= (WebView) findViewById(R.id.wv);
wv.getSettings().setJavaScriptEnabled(true);
wv.setFocusable(true);
wv.setFocusableInTouchMode(true);
wv.getSettings().setRenderPriority(WebSettings.RenderPriority.HIGH);
wv.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
wv.getSettings().setDomStorageEnabled(true);
wv.getSettings().setDatabaseEnabled(true);
wv.getSettings().setAppCacheEnabled(true);
wv.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
wv.loadUrl("https://icarosnet.com");
wv.setWebViewClient(new WebViewClient());
}
#Override
protected void onSaveInstanceState(Bundle outState ){
super.onSaveInstanceState(outState);
wv= (WebView) findViewById(R.id.wv);
wv.saveState(outState);
}
#Override
protected void onRestoreInstanceState(Bundle savedInstanceState){
super.onRestoreInstanceState(savedInstanceState);
wv= (WebView) findViewById(R.id.wv);
wv.restoreState(savedInstanceState);
}
}
Xml Manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.icarosnet.icarosnetsa">
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<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=".IcarosWeb">
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
does not respect the content that was loaded by ajax.
how can i prevent refresh and resize the view; or how can i show it only portrait and block the view.

Try this:
It saves state onPause for WebView.
#Override
public void onPause() {
super.onPause();
webViewBundle = new Bundle();
wv.saveState(webViewBundle);
}
Add in OnCreate:
if (webViewBundle == null) {
wv.getSettings().setJavaScriptEnabled(true);
wv.setFocusable(true);
wv.setFocusableInTouchMode(true);
wv.getSettings().setRenderPriority(WebSettings.RenderPriority.HIGH);
wv.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
wv.getSettings().setDomStorageEnabled(true);
wv.getSettings().setDatabaseEnabled(true);
wv.getSettings().setAppCacheEnabled(true);
wv.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
wv.loadUrl("https://icarosnet.com");
} else {
wv.restoreState(webViewBundle);
}
*Assuming wv would be declared for the class

<activity android:name=".TestActivity"
android:screenOrientation="portrait">
write this line and show it only portrait

You can just add android:screenOrientation = "potrait" inside activity tag in manifest file to make your Activity not rotate to landscape even when phone is rotated.

<activity
android:name="YourActivity"
android:screenOrientation="portrait"
android:configChanges="orientation|keyboardHidden|screenSize"/>

#Override
protected void onSaveInstanceState(Bundle outState )
{
super.onSaveInstanceState(outState);
wv.saveState(outState);
}
#Override
protected void onRestoreInstanceState(Bundle savedInstanceState)
{
super.onRestoreInstanceState(savedInstanceState);
wv.restoreState(savedInstanceState);
}

<activity
android:name=".MainActivity"
android:configChanges="orientation|keyboardHidden|screenSize"><intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>

application runs but no app icon in emulator

In my code I have a webview. the code runs and shows the web content.But after pressing the backward key in emulator i can not see the app icon in it for reopening. the logcat shows the following error also
WebActivity.java
package example.webapp;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class WebActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_web);
WebView mainWebView = (WebView) findViewById(R.id.mainWebView);
WebSettings webSettings = mainWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
mainWebView.setWebViewClient(new MyCustomWebViewClient());
mainWebView.loadUrl("http://google.com");
mainWebView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
}
private class MyCustomWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
}
logcat
08-22 17:53:11.464: E/geolocationService(278): Caught security exception registering for location updates from system. This should only happen in DumpRenderTree. please give me an answer
manifest file
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="example.webapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="8" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="example.webapp.WebActivity"
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>

Geolocation not working on webview android

I 'm trying to create an application where it will find the location of a user and it will show his location on a map. I have read the other articles about this issue and the suggested solutions but nothing worked for me. This Web app runs good in browsers (mobile and pc) but when I am trying to run it as an application stacks in the javascript of html file. I think that is a problem of permissions in javascript. This is the code of this project.
JAVA Code
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.GeolocationPermissions;
public class MainActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
WebView webview = (WebView) findViewById(R.id.webview);
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
webview.getSettings().setGeolocationEnabled(true);
webview.setWebChromeClient(new WebChromeClient() {
public void onGeolocationPermissionsShowPrompt(String origin, GeolocationPermissions.Callback callback) {
// callback.invoke(String origin, boolean allow, boolean remember);
callback.invoke(origin, true, false);
}
});
webview.loadUrl("file:///android_asset/www/geoMap.html");
}
}
AndroidManifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="gr.######.navigator"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_GPS" />
<uses-permission android:name="android.permission.ACCESS_ASSISTED_GPS" />
<uses-permission android:name="android.permission.ACCESS_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="#string/title_activity_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
HTML
<!DOCTYPE html>
<html>
<head>
<script src="http://code.jquery.com/jquery-1.9.0rc1.js"></script>
<script>
jQuery(window).ready(function(){
$("#btnInit").click(function()
{
alert('click button');
initiate_geolocation();
});
});
function initiate_geolocation() {
alert('function initiate_geolocation');
navigator.geolocation.getCurrentPosition(handle_geolocation_query,handle_errors);
}
function handle_errors(error)
{
alert('function handle_errors');
switch(error.code)
{
case error.PERMISSION_DENIED: alert("user did not share geolocation data");
break;
case error.POSITION_UNAVAILABLE: alert("could not detect current position");
break;
case error.TIMEOUT: alert("retrieving position timed out");
break;
default: alert("unknown error");
break;
}
}
function handle_geolocation_query(position){
alert('function handle_geolocation_query');
alert('Lat: ' + position.coords.latitude +
' Lon: ' + position.coords.longitude);
}
</script>
</head>
<body>
<div>
<button id="btnInit" >Find my location</button>
</div>
</body>
</html>
I 've spend several hours of searching and trying suggestion from the web but nothing worked. If someone knows something more about this issue please help.
Thanks a lot.

Bro, I too faced the same problem , i fixed by adding these below lines.hope you will also
webView.getSettings().setAppCacheEnabled(true);
webView.getSettings().setDatabaseEnabled(true);
webView.getSettings().setDomStorageEnabled(true);

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

Android local storage - android

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

Related

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

Android app for a responsive web site crashes on load up on real phone

on rotate mobile webview refresh hide menu

application runs but no app icon in emulator

Geolocation not working on webview android

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