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Saturday 2 November 2024

how to change Background of an Activity in Android

  how to change Background of an Activity in Android


Today is learn  how to change Background of an Activity in Android.



1.Main Activity.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;

    }

 

}



2.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"

    android:background="@drawable/background"

    >

    <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>

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