[Android] 24. 녹음 후 재생 / 사진 촬영 후 화면에 출력

https://github.com/upcake/Class_Examples

교육 중에 작성한 예제들은 깃허브에 올려두고 있습니다. 

gif 파일은 클릭해서 보는 것이 정확합니다.

---

 - 녹음 후 재생 -

 

 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.my33_audiorecorder">
    <!--권한 설정-->
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.RECORD_AUDIO"/>


    <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>

▲AndroidManifest.xml

 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="녹음 시작"
        android:textSize="24sp" />

    <Button
        android:id="@+id/button2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="녹음 정지"
        android:textSize="24sp" />

    <Button
        android:id="@+id/button3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="재생 시작"
        android:textSize="24sp" />

    <Button
        android:id="@+id/button4"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="재생 정지"
        android:textSize="24sp" />
</LinearLayout>

▲activity_main.xml

 

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    
    repositories {
        google()
        jcenter()
        
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.6.3'
        

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}


allprojects {
    repositories {
        google()
        jcenter()

        /*외부 라이브러리 사용 설정*/
        maven {
            url 'https://jitpack.io'
        }
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

▲build.gradle(My33_AudioRecorder)

 

apply plugin: 'com.android.application'

android {
    compileSdkVersion 29
    buildToolsVersion "29.0.3"

    defaultConfig {
        applicationId "com.example.my33_audiorecorder"
        minSdkVersion 16
        targetSdkVersion 29
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }

}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])

    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'

    /* 외부 라이브러리 추가 */
    implementation 'com.github.pedroSG94:AutoPermissions:1.0.3'
}

▲build.gradle (:app)

 

package com.example.my33_audiorecorder;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import com.pedro.library.AutoPermissions;
import com.pedro.library.AutoPermissionsListener;

import java.io.File;
import java.io.IOException;

public class MainActivity extends AppCompatActivity implements AutoPermissionsListener {
    //객체 선언
    String fileName;
    MediaPlayer player;
    MediaRecorder recorder;

    //로그캣 사용 준비
    private static final String TAG = "MainActivity";

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

        //자동으로 권한 주어지게 설정
        AutoPermissions.Companion.loadAllPermissions(this, 101);

        //sdCard에 외부 저장장치의 절대 경로를 초기화
        String sdCard = Environment.getExternalStorageDirectory().getAbsolutePath();

        //File.separator : 경로에 쓰이는 슬래쉬(/)와 같다.
        //fileName =  sdCard + "/" + "recorded.mp4";
        fileName = sdCard + File.separator + "recorded.mp4";
        Log.d(TAG, "onCreate: " + fileName);

        //버튼 객체 초기화
        Button btnRecord = findViewById(R.id.button1);
        Button btnRecStop = findViewById(R.id.button2);
        Button btnPlay = findViewById(R.id.button3);
        Button btnStop= findViewById(R.id.button4);

        //녹음 버튼 기능 추가
        btnRecord.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(recorder != null) { //레코더에 작동 흔적이 있다면 레코더 흔적을 없앤다.
                    recorder.stop();
                    recorder.release(); //release() : 메모리에서 내림
                    recorder = null;
                }
                recorder = new MediaRecorder();
                recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
                recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
                recorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);

                recorder.setOutputFile(fileName);

                try {
                    Toast.makeText(MainActivity.this, "녹음을 시작합니다", Toast.LENGTH_SHORT).show();
                    recorder.prepare();
                    recorder.start();
                } catch (Exception e) {
                    e.printStackTrace();
                    Log.d(TAG, "!!!btnRecord onClick Exception!!!");
                }
            }
        });

        //녹음 정지 버튼 기능 추가
        btnRecStop.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(recorder == null) {  //레코더가 작동중이지 않으면
                    return;
                }
                recorder.stop();
                recorder.release();
                recorder = null;
            }
        });

        //재생 버튼 기능 추가
        btnPlay.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(player != null) { //재생중이면
                    player.stop();
                    player.release();
                    player = null;
                }

                try {
                    player = new MediaPlayer();
                    player.setDataSource(fileName);
                    player.prepare();
                    player.start();
                } catch (Exception e) {
                    e.printStackTrace();
                    Log.d(TAG, "!!!btnPlay onClick Exception!!!");
                }
            }
        });

        //재생 정지 버튼 기능 추가
        btnStop.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                player.stop();
                player.release();
                player = null;
            }
        });
    }


    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        AutoPermissions.Companion.parsePermissions(this, requestCode, permissions, this);
    }

    @Override
    public void onDenied(int i, String[] strings) {
        Toast.makeText(this, "Permissions Denied", Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onGranted(int i, String[] strings) {
        Toast.makeText(this, "Permissions Granted", Toast.LENGTH_SHORT).show();
    }
}

▲MainActivity.java

 

 

 - 사진 촬영 후 화면에 출력 -

 

 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.my34_captureintent">

    <!--권한 부여-->
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.CAMERA"/>

    <uses-feature android:name="android.hardware.camera2"
        android:required="true" />


    <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>

        <!--provider 설정정-->
       <provider
           android:authorities="${applicationId}.fileprovider"
           android:name="androidx.core.content.FileProvider"
           android:exported="false"
           android:grantUriPermissions="true">

           <meta-data
               android:name="android.support.FILE_PROVIDER_PATHS"
               android:resource="@xml/filepaths"/>
       </provider>
    </application>

</manifest>

▲AndroidManifest.xml

 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="사진 촬영"
        android:textSize="24sp" />

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:srcCompat="@mipmap/ic_launcher" />
</LinearLayout>

▲activity_main.xml

 

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <external-path
        name="sdcard"
        path="." />

</paths>

▲filepaths.xml

 

package com.example.my34_captureintent;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import androidx.core.content.FileProvider;

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

import java.io.File;

public class MainActivity extends AppCompatActivity {
    //객체 선언
    File file = null;
    Button btnPic;
    ImageView imageView;

    //로그캣 사용 준비
    private static final String TAG = "MainActivity";

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

        checkDangerousPermissions();

        //이미지뷰, 버튼 객체 초기화
        imageView = findViewById(R.id.imageView);
        btnPic = findViewById(R.id.button1);

        //촬영 버튼에 기능 추가
        btnPic.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(file == null){
                    file = createFile();
                }

                Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.N){
                    intent.putExtra(MediaStore.EXTRA_OUTPUT,
                            FileProvider.getUriForFile(getApplicationContext(),
                                    getApplicationContext().getPackageName() + ".fileprovider", file));
                    Log.d(TAG, "onClick: " + getApplicationContext().getPackageName());
                }else {
                    intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
                }

                if(intent.resolveActivity(getPackageManager()) != null){
                    startActivityForResult(intent, 1004);
                }
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        Log.d(TAG, "onActivityResult: " + requestCode + ", " + resultCode);
        if(requestCode == 1004 && resultCode == RESULT_OK) {
            BitmapFactory.Options options = new BitmapFactory.Options();
            //해상도를 1/8로 줄임
            options.inSampleSize = 8;


            if (file != null) {
                Bitmap bitmap = BitmapFactory.decodeFile(file.getAbsolutePath(), options);
                imageView.setImageBitmap(bitmap);
            } else {
                Toast.makeText(this, "File is null", Toast.LENGTH_SHORT).show();
            }
        }
    }

    //파일 생성 메서드
    private File createFile() {
        String imageFileName = "test.jpg";
        File storageDir = new File(Environment.getExternalStorageDirectory()
                            + File.separator + "AnImage");
        File curFile = null;
        if(!storageDir.exists()){
            storageDir.mkdir();
            curFile = new File(storageDir, imageFileName);
        } else {
            curFile = new File(storageDir, imageFileName);
        }
        return curFile;
    }

    //------------------권한 설정 시작------------------------
    private void checkDangerousPermissions() {
        String[] permissions = {
                Manifest.permission.READ_EXTERNAL_STORAGE,
                Manifest.permission.WRITE_EXTERNAL_STORAGE,
                Manifest.permission.CAMERA
        };

        int permissionCheck = PackageManager.PERMISSION_GRANTED;
        for (int i = 0; i < permissions.length; i++) {
            permissionCheck = ContextCompat.checkSelfPermission(this, permissions[i]);
            if (permissionCheck == PackageManager.PERMISSION_DENIED) {
                break;
            }
        }

        if (permissionCheck == PackageManager.PERMISSION_GRANTED) {
            Toast.makeText(this, "권한 있음", Toast.LENGTH_LONG).show();
        } else {
            Toast.makeText(this, "권한 없음", Toast.LENGTH_LONG).show();

            if (ActivityCompat.shouldShowRequestPermissionRationale(this, permissions[0])) {
                Toast.makeText(this, "권한 설명 필요함.", Toast.LENGTH_LONG).show();
            } else {
                ActivityCompat.requestPermissions(this, permissions, 1);
            }
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        if (requestCode == 1) {
            for (int i = 0; i < permissions.length; i++) {
                if (grantResults[i] == PackageManager.PERMISSION_GRANTED) {
                    Toast.makeText(this, permissions[i] + " 권한이 승인됨.", Toast.LENGTH_LONG).show();
                } else {
                    Toast.makeText(this, permissions[i] + " 권한이 승인되지 않음.", Toast.LENGTH_LONG).show();
                }
            }
        }
    }
    //------------------권한 설정 끝------------------------

}

▲MainActivity.java

 

apply plugin: 'com.android.application'

android {
    compileSdkVersion 29
    buildToolsVersion "29.0.3"

    defaultConfig {
        applicationId "com.example.my34_captureintent"
        minSdkVersion 16
        targetSdkVersion 29
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }

}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])

    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}

▲build.gradle (:app)