1 HelloWorld Programs

-


Algorithm:
Step 1) Create a new Android Studio Project named as HelloWorld

Step 2)Goto Project Structure and open activity_main.xml file

Step 3) Create a Text view in Activity_main.xml file or drag and drop from the palette.

Step 4) Add Text to the attribute is android:text="HelloWorld!" in the TextView Tag in the activity_main.xml file.

Step 5) Run the application from the menu bar select Run and Click on Run App option. Program:
activity_main.xml

  <?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schema s.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity">

<TextView android:layout_width="wrap_content" android:layout_height="wrap_content"

android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" >
</TextView>

</android.support.constraint.ConstraintLayout>
MainActivity.java

package com.example.helloworld;

import android.support.v7.app.AppCompatActivity; import android.os.Bundle;
public class MainActivity extends AppCompatActivity { @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);
}
}



OUTPUT:










Comments

Post a Comment

Popular posts from this blog

20 Simple Content Provider Example

-
      AndroidManifest.xml <? xml version= "1.0" encoding= "utf-8" ?> < manifest xmlns: android = "http://schemas.android.com/apk/res/android" package= "com.example.aslam.contentproviderexample2" > < uses-permission android :name= "android.permission.READ_CONTACTS" /> < application     android :allowBackup= "true"     android :icon= "@mipmap/ic_launcher"     android :label= "@string/app_name"     android :roundIcon= "@mipmap/ic_launcher_round"     android :supportsRtl= "true"     android :theme= "@style/AppTheme" > < activity android :name= ".MainActivity" > < intent-filter > < action android :name= "android.intent.action.MAIN" /> < category android :name= "android.intent.category.LAUNCHER" /> </ intent-filter >
Read more

14 Popup Menu

-
Image
Algorithm: Step 1) Create a new Android Studio Project named as popupmenu. Step 2) Goto Project Structure and open the activity_main.xml file. Step 3) Create menu Android resource Directory and inside menu folder popup menu resource file. Step 4) open menu resource file and create the list of items you want to display in popup menu as options. Step 5) implement PopupMenu.OnMenuItemClickListener Interface to MainActivity class and Implement the following methods in the MainActivity class. public void showPopup(View view) {    /* user defined method by using android:onClick=”showPopup” in  activity_main.xml file.*/ //code } @Override public boolean onMenuItemClick(MenuItem item) { //code return false; } Step 7) Run the application from the menu bar select Run and Click on Run App option. Activity_main.xml
Read more

19 SQLIte SImple Database Example

-
Image
Algorithm:   Step 1)Create an Android Studio Project named as SQLiteCURD. Step 2) open activity_main.xml and design UI page. Step 3)Create a database Helper class named as DB_Controller which extends SQLiteOpenHelper . It is abstract class so we need to implement the abstract methods 1)onCreate()   2)onUpgrade() and 3)constructor for helper class as follows public class DB_Controller extends SQLiteOpenHelper {    //constructor   public DB_Controller( @androidx.annotation.Nullable Context context, @androidx.annotation.Nullable String name, @androidx.annotation.Nullable SQLiteDatabase.CursorFactory factory, int version)  { super (context, name, factory, version); } @Override   public void onCreate(SQLiteDatabase db) {  } @Override    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {  } }   Step 4) go to MainActivity class and create an object of SQLiteDatabase         Program:   activity_main.xml:
Read more