本文实例为大家分享了Android利用MediaRecorder实现录音功能 的具体代码,供大家参考,具体内容如下
android用手机录音保存到sd卡中;
布局文件:
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<Button
android:id="@+id/bt_start"
android:layout_width="match_parent"
android:text="start"
android:layout_height="wrap_content"></Button>
<Button
android:id="@+id/bt_end"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="stop"></Button>
</LinearLayout>
1.准备保存文件的路径及文件;
2.创建MediaRecorder对象,
3.调用MediaRecorder的start方法;
4.结束录音
5.调用MediaRecorder的stop方法;
6.释放资源;
开始录音:
private void startRecord(){
if (recorder==null){
File dir = new File(Environment.getExternalStorageDirectory(),"sound");
if (!dir.exists()){
dir.mkdir();
}
File file=new File(dir,System.currentTimeMillis()+".amr");
if (!file.exists()){
try {
file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
recorder =new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);//输入源通过话筒录音;
recorder.setOutputFormat(MediaRecorder.AudioEncoder.AMR_WB);//输出格式
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_WB);//音频编码
recorder.setOutputFile(file.getAbsolutePath());//设置写出文件;
try {
recorder.prepare();
recorder.start();
} catch (IOException e) {
e.printStackTrace();
}
}
}
结束录音:
private void endRecord(){
if (recorder!=null){
recorder.stop();
recorder.release();
recorder=null;
}
}
具体代码实现:
package com.example.record;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.widget.Button;
import androidx.appcompat.app.AppCompatActivity;
import java.io.File;
import java.io.IOException;
public class MainActivity extends AppCompatActivity {
private Button bt_1,bt2;
private MediaRecorder recorder ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViewById(R.id.bt_start).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startRecord();
}
});
findViewById(R.id.bt_end).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
endRecord();
}
});
}
private void startRecord(){
if (recorder==null){
File dir = new File(Environment.getExternalStorageDirectory(),"sound");
if (!dir.exists()){
dir.mkdir();
}
File file=new File(dir,System.currentTimeMillis()+".amr");
if (!file.exists()){
try {
file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
recorder =new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);//输入源通过话筒录音;
recorder.setOutputFormat(MediaRecorder.AudioEncoder.AMR_WB);//输出格式
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_WB);//音频编码
recorder.setOutputFile(file.getAbsolutePath());//设置写出文件;
try {
recorder.prepare();
recorder.start();
} catch (IOException e) {
e.printStackTrace();
}
}
}
private void endRecord(){
if (recorder!=null){
recorder.stop();
recorder.release();
recorder=null;
}
}
}
最后记得添加权限:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
<uses-permission android:name="android.permission.RECORD_AUDIO"></uses-permission>
写入文件的权限,调用录音的权限