Code for Timer using Threads in Android

March 12, 2013

Code for Timer using Threads in Android

This example shows how to record sound and save it to SD card it.

Algorithm:

1.) Create a new project by File-> New -> Android Project name it SoundRecorder.

2.) Write following into main.xml:

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="horizontal" >

    <Button

        android:id="@+id/start"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Start Recording"

        android:onClick="startRecording" />

    <Button

        android:id="@+id/stop"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Stop Recording"

        android:enabled="false"

         android:onClick="stopRecording"

        />

</LinearLayout>

3.) Write following into manifest file:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.soundrecorder"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="15" />

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

    <uses-permission android:name="android.permission.RECORD_AUDIO" />

    <application

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name=".SoundRecorder"

            android:label="@string/title_activity_sound_recorder" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

4.) Run for output.

Steps:

1.) Create a project named SoundRecorder and set the information as stated in the image.

Build Target: Android 4.0
Application Name: SoundRecorder
Package Name: com. example. SoundRecorder
Activity Name: SoundRecorder
Min SDK Version: 8

2.) Open SoundRecorder.java file and write following code there:

package com.example.soundrecorder;

import java.io.File;

import java.io.IOException;

import android.app.Activity;

import android.content.ContentResolver;

import android.content.ContentValues;

import android.content.Intent;

import android.media.MediaRecorder;

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.widget.Toast;

public class SoundRecorder extends Activity {

    MediaRecorder recorder;

    File audiofile = null;

    private static final String TAG = "SoundRecordingActivity";

    private View startButton;

    private View stopButton;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        startButton = findViewById(R.id.start);

        stopButton = findViewById(R.id.stop);

    }

    public void startRecording(View view) throws IOException {

        startButton.setEnabled(false);

        stopButton.setEnabled(true);

        File sampleDir = Environment.getExternalStorageDirectory();

        try {

            audiofile = File.createTempFile("sound", ".3gp", sampleDir);

        } catch (IOException e) {

            Log.e(TAG, "sdcard access error");

            return;

        }

        recorder = new MediaRecorder();

        recorder.setAudioSource(MediaRecorder.AudioSource.MIC);

        recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

        recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

        recorder.setOutputFile(audiofile.getAbsolutePath());

        recorder.prepare();

        recorder.start();

    }

    public void stopRecording(View view) {

        startButton.setEnabled(true);

        stopButton.setEnabled(false);

        recorder.stop();

        recorder.release();

        addRecordingToMediaLibrary();

    }

    protected void addRecordingToMediaLibrary() {

        ContentValues values = new ContentValues(4);

        long current = System.currentTimeMillis();

        values.put(MediaStore.Audio.Media.TITLE, "audio" + audiofile.getName());

        values.put(MediaStore.Audio.Media.DATE_ADDED, (int) (current / 1000));

        values.put(MediaStore.Audio.Media.MIME_TYPE, "audio/3gpp");

        values.put(MediaStore.Audio.Media.DATA, audiofile.getAbsolutePath());

        ContentResolver contentResolver = getContentResolver();

        Uri base = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;

        Uri newUri = contentResolver.insert(base, values);

        sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, newUri));

        Toast.makeText(this, "Added File " + newUri, Toast.LENGTH_LONG).show();

    }

}