Get Device ID Demo

Demo:

1) MainActivity.java: 

package com.venky.getdeviceiddemo; 

import android.app.Activity;

import android.os.Bundle;

import android.provider.Settings.Secure;

import android.widget.TextView;

public class MainActivity extends Activity {

       TextView tv = null;

       @Override

       protected void onCreate(Bundle savedInstanceState) {

             super.onCreate(savedInstanceState);

             setContentView(R.layout.activity_main);

             tv = (TextView) findViewById(R.id.tv1);

             String deviceId = Secure.getString(getContentResolver(),

                           Secure.ANDROID_ID);

             tv.setText("Your Device ID\n" + deviceId);

       }

}

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/tv1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_centerHorizontal="true"

        android:layout_centerVertical="true"

        android:text="@string/hello_world"

        android:textColor="#ffffff"

        android:textSize="20dp"

        android:textStyle="bold" />

</RelativeLayout>

3) Download this Project Click Here