Android利用MediaRecorder实现录音功能
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
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持我们。
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