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How to use Preference Activity in Android

Preference Activity is a base class mainly used for setting order of preferences of an user.It is mainly used for creating setting page of an user.In this example I am just showing how to set Preferences. First create an Activity MainActivity.java Here on clicking preference example button a page will be opened to set the preferences.
On clicking the show values we can see the see the values that we have set. MainActivity.java import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button btn = (Button) findViewById(R.id.btn_pref); Button btn1 = (Button) findViewById(R.id.btn_values); btn.setOnClickListener(new On…
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Server communication in Android

In Android we can communicate with server using HTTP request methods for getting some details from the server.We use RESTful service.Mainly we use two types of HTTP request HTTP GET(),HTTP POST() methods. In some case we have to give some values to the server for fetching some informations, then we use commonly HTTP POST() and if we simply want to request for some datas we use HTTP GET().
Lets see HTTP POST() method.
public void getResponse(String a, String b) { HttpClient httpclient = new DefaultHttpClient(); HttpPost httppost = new HttpPost("URL"); //here write the url List < NameValuePair > nameValueList = new ArrayList < NameValuePair > (2); nameValueList.add(new BasicNameValuePair("keyword", a)); nameValueList.add(new BasicNameValuePair("keyword", b)); try { httppost.setEntity(new UrlEncodedFormEntity(nameValueList)); HttpResponse response = httpclient.execute(httppost); Log.i("Tag&quo…

How to record and save a video in Android

Let's record a video :). Check the code snippet.

First need to give necessary permissions. So add these permissions to AndroidManifest.xml
  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />   <uses-permission android:name="android.permission.RECORD_AUDIO" /> MainActivity.java import java.io.File; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Locale; import android.app.Activity; import android.content.Intent; import android.content.pm.PackageManager; import android.graphics.Color; import android.graphics.drawable.ColorDrawable; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.provider.MediaStore; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.Toast; public class MainActivity extends Activity implements OnClickListener { Button btn_record; public st…