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How to get current date and time from internet in android?
This example demonstrates about how do I get date and time from internet in android.
Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project
Step 2 − Add the following code to res/layout/activity_main.xml.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"> <TextView android:id="@+id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_centerHorizontal="true" android:layout_marginTop="168dp" /> <Button android:id="@+id/button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/textView" android:layout_centerHorizontal="true" android:layout_marginTop="36dp" android:text="Click here to get current time aand date" android:textColor="@color/colorPrimary"/> </RelativeLayout>
Step 3 − Add the following code to src/MainActivity.java
import java.text.SimpleDateFormat;
import java.util.Calendar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
Calendar calendar;
SimpleDateFormat simpledateformat;
String Date;
TextView DisplayDateTime;
Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
DisplayDateTime = (TextView) findViewById(R.id.textView);
btn = (Button) findViewById(R.id.button);
calendar = Calendar.getInstance();
simpledateformat = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss");
Date = simpledateformat.format(calendar.getTime());
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
DisplayDateTime.setText(Date);
}
});
}
}Step 4 − Add the following code to androidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.sample"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run 
icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −
Click here to download the project code.
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