Create an Android app using Eclipse.

Create a layout that has a `&lt;WebView&gt;` control.

Move your HTML code to `/assets` folder.

Load webview with your file:///android_asset/&lt;your index.html&gt; file.

And you have an android app! 

You could use PhoneGap.

http://phonegap.com/

http://docs.phonegap.com/en/2.1.0/guide_getting-started_android_index.md.html#Getting%20Started%20with%20Android

This has the benefit of being a cross-platform solution. Be warned though that you may need to pay subscription fees. The simplest solution is to just embed a `WebView` as detailed in @Enigma&#39;s answer.

You can use https://appery.io/ 
It is the same phonegap but in very convinient wrapper 

&gt; **Possible Duplicate:**  
&gt; [OpenCv CreateImage Function isn’t working](https://stackoverflow.com/questions/9710520/opencv-createimage-function-isnt-working)  

&lt;!-- End of automatically inserted text --&gt;

I wish to create a new RGB image in OpenCV using Python. I don&#39;t want to load the image from a file, just create an empty image ready to do operations on.

Create a new RGB OpenCV image using Python?

I have an Activity A which calls Activity B. In Activity B, when i click on a button, finish() is called, which in turn calls onDestroy() of Activity B and returns to activity A. 

According to android documentation, Before onDestroy is called, onSaveInstanceState(Bundle bundle) will be called, where i do the following. 

    @Override
    	public void onSaveInstanceState(Bundle outState) {
    		
    		super.onSaveInstanceState(outState);
    		System.out.println(&quot;Saving webview state&quot;);
    		Log.d(TAG, &quot;In onsave&quot;);
    		wv.saveState(outState);
    
    	}

and the next time Activity B is started from Activity A, 

in the oncreate(), i do the following:

    onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    
    if(savedInstanceState != null){
    //restore webview
    }else {
    // code
    }
    }

However, before calling onDestroy in Activity B, The onSaveInstanceState method is never called. 
any help on this will be greatly appreciated.

EDIT: if this is not possible. Please let me know if there is a way to store webview state

Android: onSaveInstanceState not being called from activity

I have a **dynamic HTML5** document that does not contain any external resources (no images, css and scripts are coded inside of document). This HTML5 application is working fine with internet browser. I was wondering, if it would be possible to **convert** this **HTML5 application into standalone Android application**, so it can be executed directly without browser. Please advise.

Convert HTML5 into standalone Android App

I have a dynamic HTML5 document that does not contain any external resources (no images, css and scripts are coded inside of document). This HTML5 application is working fine with internet browser. I was wondering, if it would be possible to convert this HTML5 application into standalone Android application, so it can be executed directly without browser. Please advise.

What is the best way to show a loading spinner while the app is waiting for a response from the server?

Can this be done programmatically? So that I don&#39;t have to add the load spinner in the xml file?

Best way to show a loading/progress indicator?

In the viewpoint of running code in the UI thread, is there any difference between:

    MainActivity.this.runOnUiThread(new Runnable() {
        public void run() {
            Log.d(&quot;UI thread&quot;, &quot;I am the UI thread&quot;);
        }
    });
or
    
    MainActivity.this.myView.post(new Runnable() {
        public void run() {
            Log.d(&quot;UI thread&quot;, &quot;I am the UI thread&quot;);
        }
    });
and
     
    private class BackgroundTask extends AsyncTask&lt;String, Void, Bitmap&gt; {
        protected void onPostExecute(Bitmap result) {
            Log.d(&quot;UI thread&quot;, &quot;I am the UI thread&quot;);
        }
    }


Android basics: running code in the UI thread

I have a ViewPager, and I&#39;d like to get the current selected and visible view, not a position. 

1. `getChildAt(getCurrentItem)` returns wrong `View`
2. This works not all the time. Sometimes returns null, sometimes just returns wrong View.

        @Override
        public void setUserVisibleHint(boolean isVisibleToUser) {
            super.setUserVisibleHint(isVisibleToUser);
    
            if (isVisibleToUser == true) { 
                mFocusedListView = ListView; 
            }
        }

3. PageListener on `ViewPager` with `getChildAt()` also not working, not giving me the correct View every time. 


How can i get current visible View?

    View view = MyActivity.mViewPager.getChildAt(MyActivity.mViewPager.getCurrentItem()).getRootView();
    ListView listview = (ListView) view.findViewById(R.id.ListViewItems);

Android ViewPager get the current View

I have to design layout such that whole layout should scroll and inside layout I have to display related content in `Grid` form so I decided to use `GridView`.But problem is that I’m unable to use `GridView` inside `ScrollView` I have read documentation(Documentation also saying that we should not use `GridView` inside `ScrollView`) also.But I have to do this,so can any please give me some idea about this.Thanks

How to put GridView inside ScrollView

I know this has been discussed yet I wanted to ask about the current state of the matter. Do i have to create a ContentProvider to use CursorLoader in connection with a sqlite database? 

I found

[https://stackoverflow.com/questions/7182485/usage-cursorloader-without-contentprovider/7422343#7422343][1]

Looks exactly what I was hoping for yet as Emmby commented

 -  Users should be aware of one limitation, which is that it has no mechanism to refresh on data changes (as Loaders are supposed to do)

So another solution is mentioned 

[https://github.com/commonsguy/cwac-loaderex][2]

yet again some drawback is pointed out

 - However, to make use of the automatic re-querying, you need to use the same loader for the UI as well as for the updates, limiting its usability for background services.

Of course when using LoaderManager we want to get all the benefits for which it was introduced. So my question is if there is a way to use LoaderManager in connection with a sqlite database without having to implement a content provider yet have all the benefits of it.

Thanks


  [1]: https://stackoverflow.com/questions/7182485/usage-cursorloader-without-contentprovider/7422343#7422343
  [2]: https://github.com/commonsguy/cwac-loaderex

android - CursorLoader &amp; SQLite without Content Provider

I am currently using this piece of code to render a list:

    &lt;ul ng-cloak&gt;
        &lt;div ng-repeat=&quot;n in list&quot;&gt;
            &lt;li&gt;&lt;a href=&quot;{{ n[1] }}&quot;&gt;{{ n[0] }}&lt;/a&gt;&lt;/li&gt;
            &lt;li class=&quot;divider&quot;&gt;&lt;/i&gt;
        &lt;/div&gt;
        &lt;li&gt;Additional item&lt;/li&gt; 
    &lt;/ul&gt;

However, the `&lt;div&gt;` element is causing some very minor rendering defects on some browsers.
I would like to know is there a way to do the ng-repeat without the div container, or some alternative method to achieve the same effect.

AngularJS ng-repeat with no html element

The &#39;height&#39; and &#39;width&#39; are not supported in HTML5. How can I set a td&#39;s width and height while conforming to the HTML5 standard?

    &lt;!DOCTYPE html&gt;
    &lt;html&gt;
      &lt;head&gt;
        &lt;meta http-equiv=&quot;Content-Type&quot; content=&quot;text/html; charset=UTF-8&quot; /&gt;
        &lt;title&gt;219 班網&lt;/title&gt;
      &lt;/head&gt;

      &lt;body bgcolor=&quot;silver&quot;&gt;
        &lt;div align=&quot;center&quot;&gt;
          &lt;table&gt;
            &lt;tr&gt;
              &lt;td width=&quot;1000&quot; height=&quot;250&quot;&gt;
                &lt;object width=&quot;100%&quot; height=&quot;100%&quot; data=&quot;frameTop.html&quot;&gt;&lt;/object&gt;
              &lt;/td&gt;
            &lt;/tr&gt;
          &lt;/table&gt;
          &lt;table&gt;
            &lt;tr&gt;
              &lt;td width=&quot;300&quot; height=&quot;700&quot; &gt;
                &lt;object width=&quot;100%&quot; height=&quot;100%&quot; data=&quot;frameLeft.html&quot;&gt;&lt;/object&gt;
              &lt;/td&gt;
              &lt;td width=&quot;700&quot; height=&quot;700&quot;&gt;
                &lt;object width=&quot;100%&quot; height=&quot;100%&quot; data=&quot;frameRight.html&quot;&gt;&lt;/object&gt;
              &lt;/td&gt;
            &lt;/tr&gt;
          &lt;/table&gt;
        &lt;/div&gt;
      &lt;/body&gt;
    &lt;/html&gt;

HTML &#39;td&#39; width and height

I am trying to make a canvas app that responds to keyboard and mouse input. I have this code:

    canvas = document.getElementById(&#39;canvas&#39;);
    canvas.addEventListener(&#39;mousedown&#39;, function(event) {
		alert(&#39;mousedown&#39;);
			}, false);
    canvas.addEventListener(&#39;keydown&#39;, function(event) {
		alert(&#39;keydown&#39;);
			}, false);

The &#39;mousedown&#39; alert comes up whenever I click the mouse, but the &#39;keydown&#39; alert never comes up. The same code works fine on JS Bin: http://jsbin.com/uteha3/66/

Why isn&#39;t it working on my page? Does canvas not recognize keyboard input?

addEventListener for keydown on Canvas

I often debug my javascript code using the Chrome web debugger. In the elements tab, hovering over an element show a tooltip with a few pieces of information, including the width and the height of that element.

Sometimes, I need to see the page coordinates of the current mouse position. But it seems the debugger does not display this kind of information.

So, is there a way to add it? Like an extension or maybe there are other options?

**EDIT**

Using the accepted answer I could add the following bookmarklet and have exactly what I wanted:

    javascript:document.onmousemove = function(e){var x = e.pageX;var y = e.pageY;e.target.title = &quot;X is &quot;+x+&quot; and Y is &quot;+y;};

Is there a way to tell Chrome web debugger to show the current mouse position in page coordinates?

```css
#main {
    background: #000;
    border: 1px solid #AAAAAA;
    padding: 10px;
    color: #fff;
    width: 100px;
}
```
```html
&lt;div id=&quot;main&quot;&gt;
    Welcome
&lt;/div&gt;
```
Here I gave an `id` to the `div` element and it&#39;s applying the relevant CSS for it.

**OR**
```css
.main {
    background: #000;
    border: 1px solid #AAAAAA;
    padding: 10px;
    color: #fff;
    width: 100px;
}
```
```html
&lt;div class=&quot;main&quot;&gt;
    Welcome
&lt;/div&gt;
```
Now here I gave a `class` to the `div` and it&#39;s also doing the same job for me.

Then what is the exact difference between **Id** and **class** and when should I use **`id`** and when should I use **`class`**.? I am a newbie in CSS and Web-design and a little bit confused while dealing with this.


What is the difference between id and class in CSS, and when should I use them?

Given that Twitter Bootstrap is designed to be responsive / device-friendly, why doesn&#39;t it use relative font sizes?

Why does Twitter Bootstrap Use Pixels for Font Size?

I have this `@media` setup:

**HTML**:

    &lt;head&gt;
      &lt;meta name=&quot;viewport&quot; content=&quot;width=device-width, user-scalable=no&quot; /&gt;
    &lt;/head&gt;

**CSS**:

    @media screen and (min-width: 769px) {
    	/* STYLES HERE */
    }

    @media screen and (min-device-width: 481px) and (max-device-width: 768px) { 
    	/* STYLES HERE */
    }
    
    @media only screen and (max-device-width: 480px) {
        /* STYLES HERE */
    }

With this setup it works on the iPhone but it does not work in the browser.

Is it because I already have `device` in the meta, and maybe have `max-width:480px` instead?


@Media min-width &amp; max-width

What is the proper, universal format for creating a clickable hyperlink for users on mobile devices to call a phone number?

Area code with dashes

    &lt;a href=&quot;tel:555-555-1212&quot;&gt;555-555-1212&lt;/a&gt;

Area code with no dashes

    &lt;a href=&quot;tel:5555551212&quot;&gt;555-555-1212&lt;/a&gt;

Area code with dashes and 1

    &lt;a href=&quot;tel:1-555-555-1212&quot;&gt;555-555-1212&lt;/a&gt;

Area code with no dashes and 1

    &lt;a href=&quot;tel:15555551212&quot;&gt;555-555-1212&lt;/a&gt;

Area code with dashes, 1 and + sign

    &lt;a href=&quot;tel:+1-555-555-1212&quot;&gt;555-555-1212&lt;/a&gt;

Area code with no dashes, 1 and + sign

    &lt;a href=&quot;tel:+15555551212&quot;&gt;555-555-1212&lt;/a&gt;

How to create hyperlink to call phone number on mobile devices?

I use Javascript code

    if( (Android|webOS|iPhone|iPad|iPod|BlackBerry).test(navigator.userAgent) ) {}

for mobile device detection, but Chrome at iOS is not detected. Is there a way to detect it?
Thanks. 


iOS Chrome detection

I have a website which must be responsive for mobile phones. I&#39;ve created it using my desktop. When I adjust browser windows it&#39;s working perfectly for mobile phone but when I check it on my real mobile phone: Samsung Galaxy S2 it&#39;s not responsive to the mobile view.

What could be the wrong?

Responsive web design is working on desktop but not on mobile device

I&#39;ve built my app, I can run it on my local emulator (and also on my android device within the same network by changing debug server).

However, I want to build an APK that I can send to someone without access to the development server and I want them to be able to test application.

I see there is a section Using offline bundle on iOS section of the documentation. But I couldn&#39;t figure out how to accomplish the same for android. Is this possible? If so, how?

**UPDATE:** On the answer to this question (https://stackoverflow.com/questions/32572399/react-native-android-failed-to-load-js-bundle) it is said that offline bundle can be downloaded from development server. But when I obtain the bundle from development server the image files can&#39;t be loaded.

How can I generate an apk that can run without server with react-native?

I can&#39;t find this information. Is it true that Android React Native runs on sdkMin18 and therefore makes it supported by most android versions?

Which version does React Native support (iOS and Android)?

I have built an application with flutter that works like a reminder.&lt;br&gt;
How can I display notifications to the user even though the app is closed?

Flutter: Push notifications even if the app is closed

My android application using Kotlin is throwing this exception when I try to Run &#39;app&#39; in the emulator o in my cellphone. When I build my project it runs well, with no errors.

I am using: 

- SDK 28 (Android 9.0 (Pie))
- Gradle 5.1.1
- Gradle Plugin 3.5.0-alpha03
- Kotlin 1.3.10
- Java 1.8.0_151
- OSX 10.13.2


```
    org.gradle.internal.exceptions.LocationAwareException: buildOutput.apkData must not be null
    	at org.gradle.initialization.exception.DefaultExceptionAnalyser.transform(DefaultExceptionAnalyser.java:99)
    	at org.gradle.initialization.exception.DefaultExceptionAnalyser.collectFailures(DefaultExceptionAnalyser.java:65)
    	at org.gradle.initialization.exception.MultipleBuildFailuresExceptionAnalyser.transform(MultipleBuildFailuresExceptionAnalyser.java:39)
    	at org.gradle.initialization.exception.StackTraceSanitizingExceptionAnalyser.transform(StackTraceSanitizingExceptionAnalyser.java:29)
    	at org.gradle.initialization.DefaultGradleLauncher.finishBuild(DefaultGradleLauncher.java:194)
    	at org.gradle.initialization.DefaultGradleLauncher.finishBuild(DefaultGradleLauncher.java:141)
    	...
    Caused by: java.lang.IllegalStateException: buildOutput.apkData must not be null
    	at com.android.build.gradle.internal.ide.EarlySyncBuildOutput$Companion$load$2.invoke(EarlySyncBuildOutput.kt:103)
    	at com.android.build.gradle.internal.ide.EarlySyncBuildOutput$Companion$load$2.invoke(EarlySyncBuildOutput.kt:67)
    	at kotlin.sequences.TransformingSequence$iterator$1.next(Sequences.kt:174)
    	at kotlin.sequences.SequencesKt___SequencesKt.toCollection(_Sequences.kt:691)
    	at kotlin.sequences.SequencesKt___SequencesKt.toMutableList(_Sequences.kt:721)
    	at kotlin.sequences.SequencesKt___SequencesKt.toList(_Sequences.kt:712)
    	...
```


Content Type	Original Author	Original Content on Stackoverflow
Question	Ωmega	View Question on Stackoverflow
Solution 1 - Android	Sudarshan Bhat	View Answer on Stackoverflow
Solution 2 - Android	Jimbali	View Answer on Stackoverflow
Solution 3 - Android	alexander.antsypov	View Answer on Stackoverflow

Convert HTML5 into standalone Android App

Android Problem Overview

Android Solutions

Solution 1 - Android

Solution 2 - Android

Solution 3 - Android

Android: onSaveInstanceState not being called from activity

Create a new RGB OpenCV image using Python?

Attributions