Android Tutorial

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CHAPTER 14 UI Controls An Android application user interface is everything that the user can see and interact with. You have learned about the various layouts that you can use to position your views in an activity. This chapter will give you detail on various views. A View is an object that draws something on the screen that the user can interact with and aViewGroup is an object that holds other View (and ViewGroup) objects in order to define the layout of the user interface. You define your layout in an XML file which offers a human-readable structure for the layout, similar to HTML. For example, a simple vertical layout with a text view and a button looks like this: Android UI Controls There are number of UI controls provided by Android that allow you to build the graphical user interface for your app. S.N. UI Control & Description 1 2 3 TextView This control is used to display text to the user. EditText EditText is a predefined subclass of TextView that includes rich editing capabilities. AutoCompleteTextView The AutoCompleteTextView is a view that is similar to EditText, except that it shows a list of completion TUTORIALS POINT Simply Easy Learning
suggestions automatically while the user is typing. 4 5 6 7 8 9 10 11 12 Button A push-button that can be pressed, or clicked, by the user to perform an action. ImageButton AbsoluteLayout enables you to specify the exact location of its children. CheckBox An on/off switch that can be toggled by the user. You should use checkboxes when presenting users with a group of selectable options that are not mutually exclusive. ToggleButton An on/off button with a light indicator. RadioButton The RadioButton has two states: either checked or unchecked. RadioGroup A RadioGroup is used to group together one or more RadioButtons. ProgressBar The ProgressBar view provides visual feedback about some ongoing tasks, such as when you are performing a task in the background. Spinner A drop-down list that allows users to select one value from a set. TimePicker The TimePicker view enables users to select a time of the day, in either 24-hour mode or AM/PM mode. 13 DatePicker The DatePicker view enables users to select a date of the day. TextView A TextView displays text to the user and optionally allows them to edit it. A TextView is a complete text editor, however the basic class is configured to not allow editing. TextView Attributes Following are the important attributes related to TextView control. You can check Android official documentation for complete list of attributes and related methods which you can use to change these attributes are run time. Attribute android:id Description This is the ID which uniquely identifies the control. If set, specifies that this TextView has a textual input method and should automatically capitalize what the user types. android:capitalize Don't automatically capitalize anything - 0 Capitalize the first word of each sentence - 1 Capitalize the first letter of every word - 2 TUTORIALS POINT Simply Easy Learning
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Android Tutorial
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ABOUT THE TUTORIAL Android Tutorial
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Accessing Resources ...............
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RadioButton .......................
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Web browser Multi-touch Multi-taski
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Alternatively, you could also right
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Step 4 - Setup Android Development
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Now select all the listed plug-ins
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CHAPTER 3 Architecture Android oper
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CHAPTER 4 Application Components Ap
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CHAPTER 5 Hello World Example Let u
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Anatomy of Android Application Befo
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else needed to run an Android appli
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The R File The gen/com.example.hell
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Congratulations!!! you have develop
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from the R.color class. drawable/ l
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Now you can set the text on a TextV
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onPause() onStop() onDestroy() The
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07-19 15:00:43.405: D/Android :(866
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To create an service, you create a
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} Example This example will take yo
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Following will be the content of
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To stop the service, you can click
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android:label="@string/app_name" an
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} { } Intent intent = new Intent();
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Now to broadcast our custom intent,
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CHAPTER 10 Content Providers A cont
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import android.net.Uri; import andr
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} super(context, DATABASE_NAME, nul
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} return count; } @Override public
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Now let's enter student Name and Gr
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You can write activities against up
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The application can embed two fragm
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Here is the list of important metho
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} } * Inflate the layout for this f
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To change the mode of the emulator
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CHAPTER 12 Intents and Filters An A
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Page 77 and 78: 56 57 58 ACTION_VOICE_COMMAND Start
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Page 81 and 82: 20 EXTRA_SHORTCUT_NAME The name of
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Page 93 and 94: CHAPTER 13 UI Layouts The basic bui
Page 95 and 96: 1 You will use Eclipse IDE to creat
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Page 99 and 100: Example This example will take you
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Page 123 and 124: Kindly note above mentioned images
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Page 137 and 138: Exercise: I will recommend to try a
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installs the app on your AVD and st
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Now you try to click on two buttons
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Again let's try to run your EventD
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Defining Styles A style is defined
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} }); @Override public boolean onCr
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Let's try to run your StyleDemo a
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Following example demonstrates how
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android:orientation="vertical" >
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CHAPTER 17 Custom Components Androi
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1 2 3 You will use Eclipse IDE to c
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Let's try to run your DateV
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import android.content.Context; imp
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android:textSize="40sp" android:bac
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custom:delimiter="-" custom:fancyTe
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Following example shows you how to
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} Following will be the content of
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Example Following example shows the
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} } /* Invoking the default notific
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android:label="@string/app_name" an
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Next, you can click on "Detail of n
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