Find Device Screen Size Demo

Demo:

1) MainActivity.java: 

package com.venky.finddevicescreensizedemo;

import android.annotation.SuppressLint;

import android.app.Activity;

import android.graphics.Point;

import android.os.Bundle;

import android.view.Display;

import android.widget.TextView;

public class MainActivity extends Activity {

       TextView tv = null;

       String TAG = "";

       int width, height;

       @SuppressLint("NewApi")

       @Override

       protected void onCreate(Bundle savedInstanceState) {

             super.onCreate(savedInstanceState);

             setContentView(R.layout.activity_main);

             tv = (TextView) findViewById(R.id.tv);

             Display display = getWindowManager().getDefaultDisplay();

             if (android.os.Build.VERSION.SDK_INT <= 13) {

                    // these methods are deprecated

                    width = display.getWidth();

                    height = display.getHeight();

             } else {

                    Point p = new Point();

                    display.getSize(p);

                    // new methods

                    width = p.x;

                    height = p.y;

             }

             tv.setText("Size of the Device is\n" + width + "<=>" + height);

       }
}
 
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:background="#5F04B4"

    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" >

    <TextView

        android:id="@+id/tv"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_centerHorizontal="true"

        android:gravity="center"

        android:layout_centerVertical="true"

        android:text="@string/hello_world"

        android:textColor="#ffffff"

        android:textSize="15dp"

        android:textStyle="bold" />

</RelativeLayout>

3) Download this Project Click Here