Async Task is an android helper class that will allows you to run a background processes. If you are a Java programmer, may be you are familiar with thread. If you run a long task in the main thread, the current user interface will be blocked untill the task has finished. This is not a […]
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List View is an element that displays a collection of items in single column direction. It has an internal vertical scroll bar that enable user to scroll if it’s height bigger than display height. The type of single item in the list is any of java object. [cci]ListView[/cci] needs an adapter to works. This adapter
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Gravity is an android method for aligning view in a layout. There are two kinds of gravity, gravity and layout gravity. Basically a gravity is set in xml layout files, but you can also set a gravity of any view in java source code. To set gravity in xml use [cci]android:layout_gravity[/cci] and [cci]android:gravity[/cci] attributes. The
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Relative Layout is an android view group to align all childrens relative to other view or its parent. Relative layout give you flexibiliy to place childs wherever you want. In the previous example, I have give some basic example of Relative Layout. Now, I will give you how to create a more complex relative layout
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Linear Layout is an android View Group that aligns all children in single oriented manner, vertically or horizontally. A Linear layout can have only one orientation, only vertical or only horizontal. The orientation can be specified by using attribute [cci]android:orientation[/cci]. Horizontal Orientation By default, if you don’t specify the attribute [cci]android:orientation[/cci], the orientation of linear
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[cci]RelativeLayout[/cci] is one of android container or [cci]ViewGroup[/cci]. Like it’s name, the main feature of [cci]Relativelayout[/cci] is to place one [cci]View[/cci] relative to other [cci]View[/cci] or with it’s parent it’s self. Place a view relative to other view In order to make a relative position of one view to another view, an [cci]id[/cci] is must
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Give an ID to your view object is very useful if you want to refer to that view later in source code. For example you want to set text of a TextView in source code. To do that, put [cci]android:id[/cci] attibute to your view. In above code, you can see I have put an [cci]android:id=”@+id/textView1″[/cci].
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This tutorial will guide you to create a simple hello word application in android. Through this tutorial you will learn about the basic understanding of android activity and layout. Most common tool to create android application is Eclipse ADT plugin. You can follow step by step how to install eclipse ADT Plugin in the official
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Droping a table in oracle is very simple task. With just one row of sql statement you can drop a table. For example you want to drop [cci]school[/cci] table in database. Use this simple sql statement, the table will be dropped. Dropping multiple tables If you have multiple tables to drop, trivial way is adding
Tricky way to drop multiple table in oracle Read More »
String concatenation is joining one or more string to build a new string. Oracle use [cci]||[/cci] to join two string. Above statement will result string [cci]semurjengkol[/cci]. Note, you must use single quote [cci]'[/cci] to represent a string in oracle or error will be shown. Adding prefix to column result String concatenation can be used to
String concatenation in oracle Read More »