Chapter 1 Basic Android

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Various Files and Folder SRC :- Folder contain the .java extension files that means you can write you application code inside this file.

GOOGLE API 4.0:- Contain the file named android.jar

which contains all class library needed for running the android application.

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Conti… GEN:- Contains the R.java file, a compiler-generated file

that references all the resources found in your project.

Assets:- contains all the assets used by yourapplication, such as HTML, text files, databases,

etc

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Conti… res :- This folder contains all the resources used in your application.

This is the manifest file for your Android application.

Here you specify the permissions needed by your application, as well as other features (such as

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Conti… MAIN.XML:-

The @string in this case refers to the strings.xml file located in the res/values folder. Hence, @string/hello refers to the hello string defined in the strings.xml file, which is “FirstBasicAndroid, MainActivity!”:

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Conti… R.JAVA

R.JAVA File using eclipse automatically generate the content, you are not suppose to modify the content of R.JAVA file

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Conti…

The Activity base class defines a series of events that

governs the life cycle of an activity. The Activityclass defines the following events: ( Check out

the next slides).

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Conti… ➤ onCreate() — Called when the activity is first created ➤ onStart() — Called when the activity becomes visible to the

user➤onResume() — Called when the activity starts interacting with the user

➤ onPause() — Called when the current activity is being paused and the previous activity isbeing resumed➤onStop() — Called when the activity is no longer visible to the user➤onDestroy() — Called before the activity is destroyed by the system (either manually or bythe system to conserve memory)➤onRestart() — Called when the activity has been stopped and is restarting again

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Apply Style & Theme In android site, user or web developer can also apply the designing .

if you apply the above designing theme then, your activity

will appear as dialog box.

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Hide the activity title If you are interested to hide the title of activity if required

WHAT YOU SUPPOSE TO DO?

import the library “ import android.view.window”;

As well as “ import android.util.Log;”

Use the requestWindowFeature() method and pass it the

Window.FEATURE_NO_TITLE constant, like this:

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Conti…

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Your Activity title is hide now !

Displaying a Dialog Window Write the code inside the main yourprojectname.java file

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Conti…

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Conti..

Out Put

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Conti…

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Thank You NicheTech Computer Solutions

http://www.liveprojecttraining.in/

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