Android 开发之录音与播放
项目中可能有这样的需求：就是录音留言。今天针对这个写了这篇博客。
效果图：
文末会贴出项目下载地址，可以前去下载。。。
1，添加权限
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.WRITE_SETTINGS" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.READ_LOGS" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.GET_TASKS" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
<uses-permission android:name="android.permission.VIBRATE" />
2，看布局文件
<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"
android:gravity="center"
android:orientation="horizontal"
android:background="@drawable/main_layout_bg"
tools:context="com.gyq.recorddemo.MainActivity">
<Button
android:id="@+id/btn_voice_reset"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/icon_rerecord_nor"
android:textColor="#ffffff"
android:textSize="18sp"
android:text="重录"/>
<LinearLayout
android:id="@+id/ll_recording"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_marginLeft="20dp"
android:orientation="vertical">
<ImageView
android:id="@+id/iv_voice"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/icon_record_nor"/>
<Chronometer
android:id="@+id/chr_timer"
android:layout_marginTop="8dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp"
android:textColor="#ff0000"/>
<TextView
android:id="@+id/tv_click_status"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="12dp"
android:textSize="18sp"
android:textColor="#ffffff"
android:text="点击开始录音"/>
LinearLayout>
<Button
android:id="@+id/btn_voice_delete"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:background="@drawable/icon_clean_nor"
android:textColor="#ffffff"
android:textSize="18sp"
android:text="清除"/>
LinearLayout>
3，逻辑代码（代码中，有相应的注释）
package com.gyq.recorddemo;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.os.SystemClock;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Chronometer;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import java.io.File;
import java.io.IOException;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private LinearLayout mRecord;
private ImageView mVoice;
private TextView mStatus;
private Chronometer mTimer;
private File mRecAudioFile; // 录制的音频文件
private File mRecAudioPath; // 录制的音频文件路徑
private MediaRecorder mMediaRecorder;// MediaRecorder对象
private String strTempFile = "recaudio_";// 零时文件的前缀
private String voicePath;
private Button mBtnReset;
private Button mBtnDelete;
private int flag = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
/* 检测是否存在SD卡 */
if (Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED))
{
mRecAudioPath = Environment.getExternalStorageDirectory();// 得到SD卡得路径
} else
{
Toast.makeText(MainActivity.this, "没有SD卡", Toast.LENGTH_LONG).show();
}
}
private void initView() {
mRecord = (LinearLayout)findViewById(R.id.ll_recording);
mVoice = (ImageView)findViewById(R.id.iv_voice);
mStatus = (TextView)findViewById(R.id.tv_click_status);
mTimer = (Chronometer)findViewById(R.id.chr_timer);
mBtnReset = (Button)findViewById(R.id.btn_voice_reset);
mBtnDelete = (Button)findViewById(R.id.btn_voice_delete);
mBtnReset.setVisibility(View.GONE);
mBtnDelete.setVisibility(View.GONE);
mRecord.setOnClickListener(this);
mBtnDelete.setOnClickListener(this);
mBtnReset.setOnClickListener(this);
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.ll_recording :
if (flag == 0) {
mVoice.setImageResource(R.drawable.icon_record_moving);
mStatus.setText("点击停止录音");
mTimer.setVisibility(View.VISIBLE);
mTimer.setBase(SystemClock.elapsedRealtime());
mTimer.start();
try
{
/* ①Initial：实例化MediaRecorder对象 */
mMediaRecorder = new MediaRecorder();
/* 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.THREE_GPP);
/* ②设置音频文件的编码：AAC/AMR_NB/AMR_MB/Default */
mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
/* ②设置输出文件的路径 */
try
{
mRecAudioFile = File.createTempFile(strTempFile, ".mp4", mRecAudioPath);
voicePath = mRecAudioPath + "/" + strTempFile + System.currentTimeMillis() + ".mp4";
} catch (Exception e)
{
e.printStackTrace();
}
mMediaRecorder.setOutputFile(mRecAudioFile.getAbsolutePath());
/* ③准备 */
mMediaRecorder.prepare();
/* ④开始 */
mMediaRecorder.start();
/*按钮状态*/
} catch (IOException e)
{
e.printStackTrace();
}
}else if (flag == 1){
mVoice.setImageResource(R.drawable.icon_record_on);
mStatus.setText("点击试听");
mTimer.stop();
// TODO Auto-generated method stub
if (mRecAudioFile != null)
{
/* ⑤停止录音 */
mMediaRecorder.stop();
/* ⑥释放MediaRecorder */
mMediaRecorder.release();
mMediaRecorder = null;
}
}else if (flag == 2) {
//mVoice.setImageResource(R.drawable.icon_record_nor);
//mStatus.setText("点击开始录音");
mBtnReset.setVisibility(View.VISIBLE);
mBtnDelete.setVisibility(View.VISIBLE);
mTimer.stop();
mTimer.setVisibility(View.GONE);
mRecord.setEnabled(false);
/* 得到被点击的文件 */
Log.d("haha", "onClick: " +voicePath);
playMusic(mRecAudioFile);
}
flag = (flag + 1) % 3;
break;
case R.id.btn_voice_reset :
flag = 0;
mVoice.setImageResource(R.drawable.icon_record_nor);
mStatus.setText("点击开始录音");
mRecord.setEnabled(true);
mBtnReset.setVisibility(View.GONE);
mBtnDelete.setVisibility(View.GONE);
break;
case R.id.btn_voice_delete :
if (mRecAudioFile == null) {
return;
}
mRecAudioFile.delete();
Toast.makeText(MainActivity.this,"录音已删除",Toast.LENGTH_SHORT).show();
break;
default:
break;
}
}
/* 播放录音文件 */
private void playMusic(File file)
{
MediaPlayer player = new MediaPlayer();
try {
player.setDataSource(file.getPath());
player.prepare();
player.start();
} catch (IOException e) {
e.printStackTrace();
}
}
}
项目地址：RecordDemo