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主要代码:
package com.shao.mediarecord; import java.io.File; import java.io.IOException; import android.app.Activity; import android.media.MediaRecorder; import android.os.Bundle; import android.os.Environment; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.Toast; public class MainActivity extends Activity { public Button btnStartMedia = null; public Button btnStopMedia = null; public MediaRecorder mediaRecorder = null; private OnClickListener onclickListener = new OnClickListener() { @Override public void onClick(View v) { switch(v.getId()) { case R.id.btnStartMedia: startMediaRecord(); break; case R.id.btnStopMedia: stopMediaRecord(); break; default: break; } } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); this.btnStartMedia = (Button) findViewById(R.id.btnStartMedia); this.btnStopMedia = (Button) findViewById(R.id.btnStopMedia); this.btnStartMedia.setOnClickListener(onclickListener); this.btnStopMedia.setOnClickListener(onclickListener); } public void startMediaRecord() { if(mediaRecorder!=null) { Toast.makeText(this, "ERR", Toast.LENGTH_LONG).show(); return ; } mediaRecorder = new MediaRecorder(); mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.AMR_WB); mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_WB); File file = new File(Environment.getExternalStorageDirectory(), "bianbian"); if(!file.exists()) { file.mkdirs(); } File filePath = new File(file, System.currentTimeMillis()+".amr"); if(filePath!=null) { try { filePath.createNewFile(); } catch (IOException e) { e.printStackTrace(); } } mediaRecorder.setOutputFile(filePath.getAbsolutePath()); try { mediaRecorder.prepare(); mediaRecorder.start(); } catch (IllegalStateException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } public void stopMediaRecord() { this.mediaRecorder.stop(); this.mediaRecorder.release(); this.mediaRecorder = null; } }
介绍:打开app出现两个按钮,一个开始录音,一个停止录音。点击了开始录音后,说话,能够把声音输出到文件。
实现介绍:
开始播放声音,主要用到MediaRecorder类,可以看到这个类是可以直接实例化的。setAudioSource是设置声音源、setOutputFormat是设置输出文件格式、setAudioEncoder是设置声音编码。
mediaRecorder = new MediaRecorder(); mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.AMR_WB); mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_WB);
然后 设置输出文件和路径,调用start播放方法即可。
mediaRecorder.setOutputFile(filePath.getAbsolutePath()); mediaRecorder.prepare(); mediaRecorder.start();
附上布局配置文件
<LinearLayout 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" tools:context="com.shao.mediarecord.MainActivity" android:orientation="vertical" > <Button android:id="@+id/btnStartMedia" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="开始录制" /> <Button android:id="@+id/btnStopMedia" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="停止录制" /> </LinearLayout>
最好要说的是,读取设备和存储文件。都要增加相应的权限。
<uses-permission android:name="android.permission.RECORD_AUDIO"/> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
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原文地址:http://my.oschina.net/0x4ad/blog/375053