HELLO WORLD

DISPLAY HELLO WORLD CODES

CREATE LINEAR LAYOUT

Create or Update the template layout, Relative Layout to the following Code.

===>>src/main/res/layout/activity_home.xml

<LinearLayout

android:orientation="vertical"

android:layout_height="match_parent"

android:layout_width="match_parent" >

<TextView

android:layout_height="wrap_content"

android:layout_width="wrap_content" 

android:textColor="@android:color/black"

android:textSize="50sp"

android:text="@string/hello_world"/>

</LinearLayout>

CREATE ACTIVITY

Create or Update the template java Class. ==>> src/main/java/package-name/HomeActivity.java

Change ActionBarActivity to Activity for extended class for java class HomeActivity

public class HomeActivity extends ActionBarActivity {

 @Override

 protected void onCreate(Bundle savedInstanceState) {

 super.onCreate(savedInstanceState);

 setContentView(R.layout.activity_main);

 }

}

REGISTER ACTIVITY

Register your activity in manifest file.  ===>>src/main/AndroidManifest.xml

In it we define which activity is launcher activity means execute first.

<manifest package="net.uni_world.android_1110.foodscourt">

<application android:theme="@style/AppTheme" android:label="@string/app_name" android:icon="@drawable/ic_launcher"android:allowBackup="true">

<activity android:label="@string/app_name" android:name=".MainActivity">

<intent-filter>

<action android:name="android.intent.action.MAIN"/>

<category android:name="android.intent.category.LAUNCHER"/>

</intent-filter>

</activity>

</application>

</manifest>

NOTE: 

 REMIND THESE 3 MAIN POINT FOR CREATE APP.LIKE:

1.  FIRST IS CREATE LAYOUT ACTIVITY (XML)
2.  SECOND ONE IS CREATE JAVA ACTIVITY CLASS (.JAVA)
3.  THIRD ONE IS REGISTER UR ACTIVITY IN MENIFEST.XML ACTIVITY.