در این مقاله قصد داریم که یک برنامه بنویسیم که در این برنامه قابلیت این را دارد تا صدای کاربر ذخیره شود و دوباره بخش شود و در حافظه ی گوشی ذخیره شود ولی باید مجوز دسترسی از خود گوشی را داشته باشید.

از ویژگی هایی که این برنامه دارد:

بخش صدا

توقف صدا

ذخیره صدا و اجرای برنامه است

داخل خود پوشه ی drawble باید عکس مورد نظر را قرار دهید:

داخل کلاس اصلی بایدکد زیر را بنویسید:

import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import java.io.IOException;
import java.util.Random;
import static android.Manifest.permission.RECORD_AUDIO;
import static android.Manifest.permission.WRITE_EXTERNAL_STORAGE;
import android.support.v4.app.ActivityCompat;
import android.content.pm.PackageManager;
import android.support.v4.content.ContextCompat;

public class MainActivity extends AppCompatActivity {

    Button buttonStart, buttonStop, buttonPlayLastRecordAudio, buttonStopPlayingRecording ;
    String AudioSavePathInDevice = null;
    MediaRecorder mediaRecorder ;
    Random random ;
    String RandomAudioFileName = "ABCDEFGHIJKLMNOP";
    public static final int RequestPermissionCode = 1;
    MediaPlayer mediaPlayer ;

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

        buttonStart = (Button) findViewById(R.id.button);
        buttonStop = (Button) findViewById(R.id.button2);
        buttonPlayLastRecordAudio = (Button) findViewById(R.id.button3);
        buttonStopPlayingRecording = (Button)findViewById(R.id.button4);

        buttonStop.setEnabled(false);
        buttonPlayLastRecordAudio.setEnabled(false);
        buttonStopPlayingRecording.setEnabled(false);

        random = new Random();

        buttonStart.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                if(checkPermission()) {

                    AudioSavePathInDevice = Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + CreateRandomAudioFileName(5) + "AudioRecording.3gp";

                    MediaRecorderReady();

                    try {
                        mediaRecorder.prepare();
                        mediaRecorder.start();
                    } catch (IllegalStateException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }

                    buttonStart.setEnabled(false);
                    buttonStop.setEnabled(true);

                    Toast.makeText(MainActivity.this, "Recording started", Toast.LENGTH_LONG).show();
                }
                else {

                    requestPermission();

                }

            }
        });

        buttonStop.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                mediaRecorder.stop();

                buttonStop.setEnabled(false);
                buttonPlayLastRecordAudio.setEnabled(true);
                buttonStart.setEnabled(true);
                buttonStopPlayingRecording.setEnabled(false);

                Toast.makeText(MainActivity.this, "Recording Completed", Toast.LENGTH_LONG).show();

            }
        });

        buttonPlayLastRecordAudio.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) throws IllegalArgumentException, SecurityException, IllegalStateException {

                buttonStop.setEnabled(false);
                buttonStart.setEnabled(false);
                buttonStopPlayingRecording.setEnabled(true);

                mediaPlayer = new MediaPlayer();

                try {
                    mediaPlayer.setDataSource(AudioSavePathInDevice);
                    mediaPlayer.prepare();
                } catch (IOException e) {
                    e.printStackTrace();
                }

                mediaPlayer.start();

                Toast.makeText(MainActivity.this, "Recording Playing", Toast.LENGTH_LONG).show();

            }
        });

        buttonStopPlayingRecording.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                buttonStop.setEnabled(false);
                buttonStart.setEnabled(true);
                buttonStopPlayingRecording.setEnabled(false);
                buttonPlayLastRecordAudio.setEnabled(true);

                if(mediaPlayer != null){

                    mediaPlayer.stop();
                    mediaPlayer.release();

                    MediaRecorderReady();

                }

            }
        });
    }

    public void MediaRecorderReady(){

        mediaRecorder=new MediaRecorder();

        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);

        mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

        mediaRecorder.setAudioEncoder(MediaRecorder.OutputFormat.AMR_NB);

        mediaRecorder.setOutputFile(AudioSavePathInDevice);

    }

    public String CreateRandomAudioFileName(int string){

        StringBuilder stringBuilder = new StringBuilder( string );

        int i = 0 ;
        while(i < string ) {

            stringBuilder.append(RandomAudioFileName.charAt(random.nextInt(RandomAudioFileName.length())));

            i++ ;
        }
        return stringBuilder.toString();

    }

    private void requestPermission() {

        ActivityCompat.requestPermissions(MainActivity.this, new String[]{WRITE_EXTERNAL_STORAGE, RECORD_AUDIO}, RequestPermissionCode);

    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
        switch (requestCode) {
            case RequestPermissionCode:
                if (grantResults.length > 0) {

                    boolean StoragePermission = grantResults[0] == PackageManager.PERMISSION_GRANTED;
                    boolean RecordPermission = grantResults[1] == PackageManager.PERMISSION_GRANTED;

                    if (StoragePermission && RecordPermission) {

                        Toast.makeText(MainActivity.this, "Permission Granted", Toast.LENGTH_LONG).show();
                    }
                    else {
                        Toast.makeText(MainActivity.this,"Permission Denied",Toast.LENGTH_LONG).show();

                    }
                }

                break;
        }
    }

    public boolean checkPermission() {

        int result = ContextCompat.checkSelfPermission(getApplicationContext(), WRITE_EXTERNAL_STORAGE);
        int result1 = ContextCompat.checkSelfPermission(getApplicationContext(), RECORD_AUDIO);

        return result == PackageManager.PERMISSION_GRANTED && result1 == PackageManager.PERMISSION_GRANTED;
    }

}

در لایه main قطعه کد زیر را قرار دهید:

<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: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="com.android_examples.audiorecording_android_examplescom.MainActivity">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/imageView"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:src="@drawable/mic_pic"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Record"
        android:id="@+id/button"
        android:layout_below="@+id/imageView"
        android:layout_alignParentLeft="true"
        android:layout_marginTop="37dp"
        />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="STOP"
        android:id="@+id/button2"
        android:layout_alignTop="@+id/button"
        android:layout_centerHorizontal="true"
        />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Play"
        android:id="@+id/button3"
        android:layout_alignTop="@+id/button2"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="STOP PLAYING RECORDING "
        android:id="@+id/button4"
        android:layout_below="@+id/button2"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="10dp"

        />
</RelativeLayout>

مجوز های دسترسی را داخل manifest خود قرار دهید:

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