Android apps for voice recorder (Beta)

This is inspired by the profgustin(You Tube) 

 The first file will be AndroidMenifest.xml

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.saroj.andridrecording" >
    <uses-permission android:name="android.permission.RECORD_AUDIO"></uses-permission>
    <uses-permission android:name="android.permission.write_external_storage"></uses-permission>

    <application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >
        <activity            android:name=".MainActivity"            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

The Second File is MainActivity.java

import android.app.Activity;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Environment;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;

import java.io.File;

public class MainActivity extends Activity {

    //MediaRecorder class is for Recording and Media Player is for Playing the Recorded Media    private MediaRecorder mediaRecorder;
    private MediaPlayer mediaPlayer;
    // The String OUTPUT_FILE will hold the path of the OUTPUT_FILE    private String OUTPUT_FILE;

    @Override    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        OUTPUT_FILE= Environment.getExternalStorageDirectory()+"/audiorecorder.3gpp";


    }


    public void buttonTapped(View v)
    {

        switch (v.getId())
        {
            case R.id.StartButton:
                try                {
                    beginRecording();
                }
                catch (Exception ex)
                {
                    ex.printStackTrace();
                }
                break;

            case R.id.FinishButton:
                try                {
                    stopRecording();
                }
                catch (Exception ex)
                {
                    ex.printStackTrace();
                }
                break;

            case R.id.PlayRecording:
                try                {
                    playRecording();
                }
                catch (Exception ex)
                {
                    ex.printStackTrace();
                }
                break;

            case R.id.StopPlayBack:
                try                {
                    stopPlayBack();
                }
                catch (Exception ex)
                {
                    ex.printStackTrace();
                }
                break;


        }


    }

    private void beginRecording()
    {

        ditchMediaRecorder();
        File outFile=new File(OUTPUT_FILE);
        if(outFile.exists())
            outFile.delete();
        mediaRecorder=new MediaRecorder();
        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
        mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
        mediaRecorder.setOutputFile(OUTPUT_FILE);

        try        {
            mediaRecorder.prepare();
            mediaRecorder.start();
        }
        catch (Exception ex)
        {

        }


    }

    private void stopRecording()
    {
        if(mediaRecorder!=null) {
            mediaRecorder.stop();
        }
    }


    private void  playRecording()
    {
        ditchMediaPlayer();
        mediaPlayer=new MediaPlayer();
        try {
            mediaPlayer.setDataSource(OUTPUT_FILE);
            mediaPlayer.prepare();
            mediaPlayer.start();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    private void ditchMediaPlayer() {

        if(mediaPlayer!=null)
        {
            try{
                mediaPlayer.release();

            }
            catch (Exception ex)
            {
                 ex.getMessage();
            }
        }
    }


    private void stopPlayBack()
    {
        if (mediaPlayer!=null)
    {
        mediaPlayer.stop();
    }

    }

    private void ditchMediaRecorder()
    {
        if( mediaRecorder !=null)
        {
            mediaRecorder.release();
        }
    }
}


The Third and final layout file is activity_main.xml,  

<LinearLayout 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:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:paddingBottom="@dimen/activity_vertical_margin"    tools:context=".MainActivity"    android:orientation="horizontal">

    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="vertical">

        <Button            android:layout_width="match_parent"            android:layout_height="0dp"            android:text="Start Recording"            android:id="@+id/StartButton"            android:layout_weight="1"            android:onClick="buttonTapped" />

        <Button            android:layout_width="match_parent"            android:layout_height="0dp"            android:text="Finish Recording"            android:id="@+id/FinishButton"            android:layout_weight="1"            android:onClick="buttonTapped" />

        <Button            android:layout_width="match_parent"            android:layout_height="0dp"            android:text="Play Recording"            android:id="@+id/PlayRecording"            android:layout_weight="1"            android:onClick="buttonTapped" />

        <Button            android:layout_width="match_parent"            android:layout_height="0dp"            android:text="Stop PlayBack"            android:id="@+id/StopPlayBack"            android:layout_weight="1"            android:onClick="buttonTapped" />
    </LinearLayout>

</LinearLayout>