Full Screen Demo in Android

This example explains how to set Application to fullscreen in android.

Algorithm:

1.)  Create a new project by File-> New -> Android Project name it FullScreenDemo.

2.)  Write following into main.xml:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent"
    >
    <view class="com.example.FullScreenDemo.FullScreenDemo$IV"
        android:id="@+id/image"
        android:src="@drawable/skycubemap2"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="center"
        />
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="25dp"
        android:layout_marginRight="25dp"
        android:layout_marginBottom="25dp"
        android:layout_gravity="bottom|center"
        android:background="#60000000"
        android:padding="8dp"
        android:orientation="horizontal"
        >
        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:orientation="vertical"
            >
            <TextView
                android:id="@+id/text1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#FFFFFFFF"
                android:textSize="16dp"
                android:textStyle="bold"
                android:gravity="left"
                />
            <TextView
                android:id="@+id/text2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#FFFFFFFF"
                android:textSize="11dp"
                android:textStyle="bold"
                android:gravity="left"
                />
        </LinearLayout>
        <TextView
            android:id="@+id/switchy"
            android:background="#C0000000"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom"
            android:layout_marginTop="4dp"
            android:padding="10dp"
            android:textColor="#FFFFFFFF"
            android:textSize="11dp"
            android:textStyle="bold"
            android:clickable="true"
            android:onClick="clicked"
            android:text="Switch"
            />
    </LinearLayout>
</FrameLayout>

3.)  Select a wallpaper or background image and put it into drawable folder. Either rename the image “skycubemap2” or change the name into main.xml accordingly.

4.)  Run for output.

Steps:

1.) Create a project named FullScreenDemo and set the information as stated in the image.

Build Target: Android 4.0

Application Name: FullScreenDemo

Package Name: com. example. FullScreenDemo

Activity Name: FullScreenDemo

Min SDK Version: 14

2.) Open FullScreenDemo.java file and write following code there:

package com.example.FullScreenDemo;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.util.AttributeSet;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageView;
import android.widget.TextView;


public class FullScreenDemo extends Activity {
	public static class IV extends ImageView {
		private FullScreenDemo mActivity;
		public IV(Context context) {
			super(context);
		}
		public IV(Context context, AttributeSet attrs) {
			super(context, attrs);
		}
		public void setActivity(FullScreenDemo act) {
			mActivity = act;
		}
		public void onSystemUiVisibilityChanged(int visibility) {
			mActivity.getState().onSystemUiVisibilityChanged(visibility);
		}
	}

	private interface State {
		void apply();
		State next();
		void onSystemUiVisibilityChanged(int visibility);
	}
	private class NormalState implements State {
		public void apply() {
			display("Normal");
			setFullscreen(false);
			mImage.setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);
		}
		public State next() {
			return new FullscreenState();
		}
		public void onSystemUiVisibilityChanged(int visibility) {
		}
	}
	private class FullscreenState implements State {
		public void apply() {
			display("FULLSCREEN");
			setFullscreen(true);
		}
		public State next() {
			return new NormalState();
		}
		public void onSystemUiVisibilityChanged(int visibility) {
		}
	}

	private void setFullscreen(boolean on) {
		Window win = getWindow();
		WindowManager.LayoutParams winParams = win.getAttributes();
		final int bits = WindowManager.LayoutParams.FLAG_FULLSCREEN;
		if (on) {
			winParams.flags |=  bits;
		} else {
			winParams.flags &= ~bits;
		}
		win.setAttributes(winParams);
	}

	private void display(String text) {
		mText1.setText(text);
	}
	State getState() {
		return mState;
	}

	static int TOAST_LENGTH = 500;
	IV mImage;
	TextView mText1, mText2;
	State mState;

	public FullScreenDemo() {
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		Window win = getWindow();
		WindowManager.LayoutParams winParams = win.getAttributes();
		winParams.flags |= WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;
		win.setAttributes(winParams);

		setContentView(R.layout.main);
		mImage = (IV) findViewById(R.id.image);
		mImage.setActivity(this);
		mText1 = (TextView) findViewById(R.id.text1);
		mText2 = (TextView) findViewById(R.id.text2);
	}

	@Override
	public void onAttachedToWindow() {
		mState = new NormalState();
		mState.apply();
	}

	@Override
	protected void onResume() {
		super.onResume();
	}

	public void clicked(View v) {
		mState = mState.next();
		mState.apply();
	}
}

3.) Compile and build the project.

Output