1 Android录音需要声明录音权限
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
2.录音文件要写到文件夹中，创建文件夹，在Application的onCreate方法中创建文件夹
@Override
public void onCreate() {
super.onCreate();
CrashHandler mCrashHandler = CrashHandler.getInstance();
mCrashHandler.init(getApplicationContext(), getClass());
initFile();
}
private void initFile() {
//录音文件
File audioFile = new File(Constant.UrlAudio);
if (!audioFile.exists()) {
audioFile.mkdirs();
} else if (!audioFile.isDirectory()) {
audioFile.delete();
audioFile.mkdirs();
}
//拍摄图片文件
File imageFile = new File(Constant.UrlImage);
if (!imageFile.exists()) {
imageFile.mkdirs();
} else if (!imageFile.isDirectory()) {
imageFile.delete();
imageFile.mkdirs();
}
}
Constant.UrlImage是个静态的文件路径
//录音文件
public static String UrlAudio = FileUtil.getSdcardPathOnSys()+"/EhmFile/media/audio/";
3.在activity中开始录音
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.media.MediaRecorder;
import android.text.format.DateFormat;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.io.File;
import java.io.IOException;
import java.util.Calendar;
import java.util.Locale;
public class Record2Activity extends AppCompatActivity {
// 录音界面相关
Button btnStart;
Button btnStop;
TextView textTime;
// 录音功能相关
MediaRecorder mMediaRecorder; // MediaRecorder 实例
boolean isRecording; // 录音状态
String fileName; // 录音文件的名称
String filePath; // 录音文件存储路径
Thread timeThread; // 记录录音时长的线程
int timeCount; // 录音时长 计数
final int TIME_COUNT = 0x101;
// 录音文件存放目录
final String audioSaveDir = Environment.getExternalStorageDirectory().getAbsolutePath() + "/audiodemo/";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_record2);
btnStart = (Button) findViewById(R.id.btn_start);
btnStop = (Button) findViewById(R.id.btn_stop);
textTime = (TextView) findViewById(R.id.text_time);
btnStart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// 开始录音
btnStart.setEnabled(false);
btnStop.setEnabled(true);
startRecord();
isRecording = true;
// 初始化录音时长记录
timeThread = new Thread(new Runnable() {
@Override
public void run() {
countTime();
}
});
timeThread.start();
}
});
btnStop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// 停止录音
btnStart.setEnabled(true);
btnStop.setEnabled(false);
stopRecord();
isRecording = false;
}
});
}
// 记录录音时长
private void countTime() {
while (isRecording) {
Log.d("mediaRe","正在录音");
timeCount++;
Message msg = Message.obtain();
msg.what = TIME_COUNT;
msg.obj = timeCount;
myHandler.sendMessage(msg);
try {
timeThread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
Log.d("mediaRec", "结束录音");
timeCount = 0;
Message msg = Message.obtain();
msg.what = TIME_COUNT;
msg.obj = timeCount;
myHandler.sendMessage(msg);
}
/**
* 开始录音 使用amr格式
* 录音文件
*
* @return
*/
public void startRecord() {
// 开始录音
/* ①Initial：实例化MediaRecorder对象 */
if (mMediaRecorder == null)
mMediaRecorder = new MediaRecorder();
try {
/* ②setAudioSource/setVedioSource */
mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);// 设置麦克风
/*
* ②设置输出文件的格式：THREE_GPP/MPEG-4/RAW_AMR/Default THREE_GPP(3gp格式
* ，H263视频/ARM音频编码)、MPEG-4、RAW_AMR(只支持音频且音频编码要求为AMR_NB)
*/
mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
/* ②设置音频文件的编码：AAC/AMR_NB/AMR_MB/Default 声音的（波形）的采样 */
mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
fileName = DateFormat.format("yyyyMMdd_HHmmss", Calendar.getInstance(Locale.CHINA)) + ".m4a";
//注意文件夹要创建之后才能使用
filePath = Constant.UrlAudio + fileName;
/* ③准备 */
mMediaRecorder.setOutputFile(filePath);
mMediaRecorder.prepare();
/* ④开始 */
mMediaRecorder.start();
} catch (IllegalStateException e) {
Log.i("mediaEr", "call startAmr(File mRecAudioFile) failed!" + e.getMessage());
} catch (IOException e) {
e.printStackTrace();
Log.i("mediaEr", "call startAmr(File mRecAudioFile) failed!" + e.getMessage());
}
}
/**
* 停止录音
*/
public void stopRecord() {
//有一些网友反应在5.0以上在调用stop的时候会报错，翻阅了一下谷歌文档发现上面确实写的有可能会报错的情况，捕获异常清理一下就行了，感谢大家反馈！
try {
mMediaRecorder.stop();
mMediaRecorder.release();
mMediaRecorder = null;
filePath = "";
} catch (RuntimeException e) {
Log.e("mediaR", e.toString());
mMediaRecorder.reset();
mMediaRecorder.release();
mMediaRecorder = null;
File file = new File(filePath);
if (file.exists())
file.delete();
filePath = "";
}
}
// 格式化 录音时长为 秒
public static String FormatMiss(int miss) {
return "" + miss;
}
Handler myHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case TIME_COUNT:
int count = (int) msg.obj;
Log.d("meidaRe","count == " + count);
textTime.setText(FormatMiss(count));
break;
}
}
};
@Override
protected void onDestroy() {
super.onDestroy();
myHandler.removeCallbacksAndMessages(null);
}
}
布局文件很简单
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".Record2Activity">
<Button
android:id="@+id/btn_stop"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="结束"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/btn_start"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/btn_start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="开始"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/btn_stop"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/text_time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="11dp"
android:layout_marginTop="47dp"
android:text="时间"
app:layout_constraintStart_toStartOf="@+id/btn_start"
app:layout_constraintTop_toBottomOf="@+id/btn_start" />
</androidx.constraintlayout.widget.ConstraintLayout>
这样就可以使用录音功能了
