Tutorial by Examples: i

Android allows programmers to place images at all four corners of a TextView. For example, if you are creating a field with a TextView and at same time you want to show that the field is editable, then developers will usually place an edit icon near that field. Android provides us an interesting opt...

AsyncTask is an abstract Class and does not inherit the Thread class. It has an abstract method doInBackground(Params... params), which is overridden to perform the task. This method is called from AsyncTask.call(). Executor are part of java.util.concurrent package. Moreover, AsyncTask contains 2 ...

To open an app with defined URL scheme todolist://: Objective-C NSURL *myURL = [NSURL URLWithString:@"todolist://there/is/something/to/do"]; [[UIApplication sharedApplication] openURL:myURL]; Swift let stringURL = "todolist://there/is/something/to/do" if let url = NSURL(s...

ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo Info = cm.getActiveNetworkInfo(); if (Info == null || !Info.isConnectedOrConnecting()) { Log.i(TAG, "No connection"); } else { ...

A trapezoid can be made by a block element with zero height (height of 0px), a width greater than zero and a border, that is transparent except for one side: HTML: <div class="trapezoid"></div> CSS: .trapezoid { width: 50px; height: 0; border-left: 50px ...

Here is a generic ViewHolder class that you can use with any DataBinding layout. Here an instance of particular ViewDataBinding class is created using the inflated View object and DataBindingUtil utility class. import android.databinding.DataBindingUtil; import android.support.v7.widget.RecyclerVi...

Using Picasso as ImageGetter for Html.fromHtml public class PicassoImageGetter implements Html.ImageGetter { private TextView textView; private Picasso picasso; public PicassoImageGetter(@NonNull Picasso picasso, @NonNull TextView textView) { this.picasso = picasso; this.textView...

It's good practice to mark some warnings in your code. For example, some deprecated methods is need for your testing, or old support version. But Lint checking will mark that code with warnings. For avoiding this problem, you need use annotation @SuppressWarnings. For example, add ignoring to warni...

You can communicate two activities so that Activity A can be notified of an event happening in Activity B. Activity A final String eventName = "your.package.goes.here.EVENT"; @Override protected void onCreate(Bundle savedInstanceState) { registerEventReceiver(); super.onCre...

Unlike for and while loops, do-while loops check the truth of the condition at the end of the loop, which means the do block will execute once, and then check the condition of the while at the bottom of the block. Meaning that a do-while loop will always run at least once. For example this do-while...

A use case that comes across frequently, is creating a String from a stream, where the stream-items are separated by a certain character. The Collectors.joining() method can be used for this, like in the following example: Stream<String> fruitStream = Stream.of("apple", "banana...

A collection can be created by using the CreateDocumentCollectionAsync method of the DocumentClient class. A collection is a container of JSON documents and associated JavaScript application logic. async Task CreateCollection(DocumentClient client) { var databaseName = "<your database...

In some cases it may not suffice to know whether more that one methods were called. The calling order of methods is also important. In such case you may use InOrder class of Mockito to verify the order of methods. SomeClass mock1 = Mockito.mock(SomeClass.class); otherClass mock2 = Mockito.mock(Oth...

Set up some constants for the server and authentication information. Assuming LDAPv3, but it's easy enough to change that. // Authentication, and the name of the server. private const string LDAPUser = "cn=example:app:mygroup:accts,ou=Applications,dc=example,dc=com"; private readonly ch...

Assuming LDAPv3, but it's easy enough to change that. This is anonymous, unencrypted LDAPv3 LdapConnection creation. private const string TargetServer = "ldap.example.com"; Actually create the connection with three parts: an LdapDirectoryIdentifier (the server), and NetworkCredentials....

Input file Mary had a little lamb its fleece was white as snow and everywhere that Mary went the lamb was sure to go. Pig Word Count Code -- Load input from the file named Mary, and call the single -- field in the record 'line'. input = load 'mary' as (line); -- TOKENIZE splits the line...

View content: adb shell ls \$EXTERNAL_STORAGE adb shell ls \$SECONDARY_STORAGE View path: adb shell echo \$EXTERNAL_STORAGE adb shell echo \$SECONDARY_STORAGE

Entity Framework (EF) is an object-relational mapper that enables .NET developers to work with relational data using domain-specific objects. It eliminates the need for most of the data-access code that developers usually need to write. Entity Framework allows you to create a model by writing cod...

A job queue that maintains a worker pool, useful for doing things like background processing in web servers: package main import ( "fmt" "runtime" "strconv" "sync" "time" ) // Job - interface for job processing type Job interf...

Goal: <FruitBasket xmlns="http://www.fruitauthority.fake"> <Fruit> <FruitName>Banana</FruitName> <FruitColor>Yellow</FruitColor> </Fruit> <Fruit> <FruitName>Apple</FruitName> <FruitColor>Red<...