How to Create Simple Android Application using Java

 How to Create Simple Android Application using Java

Welcome To my Tutorial today Learn How to Create Simple Android Application using Java.

1. Creating an Android Project with  Android Studio/ Eclipse

2. First Can Open MainActivity.Java File

MainActivity.Java:

import android.os.Bundle;

import android.app.Activity;

import android.view.Menu;

 

public class MainActivity extends Activity {

 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

    }

 

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.main, menu);

        return true;

    }

 

}

3.Xml code:

activity_main.xml:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity"

    >

 

    <!-- This is a comment -->

 

 

    <!-- Create your comments like this -->

 

    <TextView

        android:id="@+id/textView2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/textView1"

        android:layout_alignParentTop="true"

        android:layout_marginTop="18dp"

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

 

    <TextView

        android:id="@+id/textView1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_alignParentTop="true"

        android:layout_marginTop="53dp"

        android:text="This is a Large Text View"

        android:textAppearance="?android:attr/textAppearanceLarge" />

 

    <TextView

        android:id="@+id/textView3"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/textView1"

        android:layout_below="@+id/textView1"

        android:layout_marginTop="16dp"

        android:text="This is Medium Text View"

        android:textAppearance="?android:attr/textAppearanceMedium" />

 

    <TextView

        android:id="@+id/textView4"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/textView3"

        android:layout_below="@+id/textView3"

        android:layout_marginTop="14dp"

        android:text="Small Text"

        android:textAppearance="?android:attr/textAppearanceSmall" />

 

    <Button

        android:id="@+id/button1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/textView4"

        android:layout_below="@+id/textView4"

        android:layout_marginTop="16dp"

        android:text="Button" />

 

    <ToggleButton

        android:id="@+id/toggleButton1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignBaseline="@+id/button2"

        android:layout_alignBottom="@+id/button2"

        android:layout_alignParentRight="true"

        android:text="ToggleButton" />

 

    <Button

        android:id="@+id/button2"

        style="?android:attr/buttonStyleSmall"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignTop="@+id/button1"

        android:layout_centerHorizontal="true"

        android:text="Small Button" />

 

    <CheckBox

        android:id="@+id/checkBox1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignRight="@+id/toggleButton1"

        android:layout_below="@+id/toggleButton1"

        android:layout_marginTop="93dp"

        android:text="CheckBox" />

 

    <CheckedTextView

        android:id="@+id/checkedTextView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignBaseline="@+id/checkBox1"

        android:layout_alignBottom="@+id/checkBox1"

        android:layout_alignLeft="@+id/button1"

        android:text="CheckedTextView" />

 

    <RadioButton

        android:id="@+id/radioButton1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/checkedTextView1"

        android:layout_below="@+id/checkBox1"

        android:layout_marginTop="34dp"

        android:text="RadioButton" />

 

    <RadioButton

        android:id="@+id/radioButton2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/radioButton1"

        android:layout_below="@+id/radioButton1"

        android:text="RadioButton" />

 

</RelativeLayout>

4. Run Application