自微信出现以来取得了很好的成绩,语音对讲的实现更加方便了人与人之间的交流。今天来实践一下微信的语音对讲的录音实现,这个也比较容易实现。在此,我将该按钮封装成为一个控件,并通过策略模式的方式实现录音和界面的解耦合,以方便我们在实际情况中对录音方法的不同需求(例如想要实现wav格式的编码时我们也就不能再使用MediaRecorder,而只能使用AudioRecord进行处理)。
效果图:
实现思路
1.在微信中我们可以看到实现语音对讲的是通过点按按钮来完成的,因此在这里我选择重新自己的控件使其继承自Button并重写onTouchEvent方法,来实现对录音的判断。
2.在onTouchEvent方法中,
当我们按下按钮时,首先显示录音的对话框,然后调用录音准备方法并开始录音,接着开启一个计时线程,每隔0.1秒的时间获取一次录音音量的大小,并通过Handler根据音量大小更新Dialog中的显示图片;
当我们移动手指时,若手指向上移动距离大于50,在Dialog中显示松开手指取消录音的提示,并将isCanceled变量(表示我们最后是否取消了录音)置为true,上移动距离小于20时,我们恢复Dialog的图片,并将isCanceled置为false;
当抬起手指时,我们首先关闭录音对话框,接着调用录音停止方法并关闭计时线程,然后我们判断是否取消录音,若是的话则删除录音文件,否则判断计时时间是否太短,最后调用回调接口中的recordEnd方法。
3.在这里为了适应不同的录音需求,我使用了策略模式来进行处理,将每一个不同的录音方法视为一种不同的策略,根据自己的需要去改写。
注意问题
1.在onTouchEvent的返回值中应该返回true,这样才能屏蔽之后其他的触摸事件,否则当手指滑动离开Button之后将不能在响应我们的触摸方法。
2.不要忘记为自己的App添加权限:
<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" />
代码参考
RecordButton 类,我们的自定义控件,重新复写了onTouchEvent方法
package com.example.recordtest;
import android.annotation.SuppressLint;
import android.app.Dialog;
import android.content.Context;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class RecordButton extends Button {
private static final int MIN_RECORD_TIME = 1; // 最短录音时间,单位秒
private static final int RECORD_OFF = 0; // 不在录音
private static final int RECORD_ON = 1; // 正在录音
private Dialog mRecordDialog;
private RecordStrategy mAudioRecorder;
private Thread mRecordThread;
private RecordListener listener;
private int recordState = 0; // 录音状态
private float recodeTime = 0.0f; // 录音时长,如果录音时间太短则录音失败
private double voiceValue = 0.0; // 录音的音量值
private boolean isCanceled = false; // 是否取消录音
private float downY;
private TextView dialogTextView;
private ImageView dialogImg;
private Context mContext;
public RecordButton(Context context) {
super(context);
// TODO Auto-generated constructor stub
init(context);
}
public RecordButton(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
init(context);
}
public RecordButton(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
init(context);
}
private void init(Context context) {
mContext = context;
this.setText("按住 说话");
}
public void setAudioRecord(RecordStrategy record) {
this.mAudioRecorder = record;
}
public void setRecordListener(RecordListener listener) {
this.listener = listener;
}
// 录音时显示Dialog
private void showVoiceDialog(int flag) {
if (mRecordDialog == null) {
mRecordDialog = new Dialog(mContext, R.style.Dialogstyle);
mRecordDialog.setContentView(R.layout.dialog_record);
dialogImg = (ImageView) mRecordDialog
.findViewById(R.id.record_dialog_img);
dialogTextView = (TextView) mRecordDialog
.findViewById(R.id.record_dialog_txt);
}
switch (flag) {
case 1:
dialogImg.setImageResource(R.drawable.record_cancel);
dialogTextView.setText("松开手指可取消录音");
this.setText("松开手指 取消录音");
break;
default:
dialogImg.setImageResource(R.drawable.record_animate_01);
dialogTextView.setText("向上滑动可取消录音");
this.setText("松开手指 完成录音");
break;
}
dialogTextView.setTextSize(14);
mRecordDialog.show();
}
// 录音时间太短时Toast显示
private void showWarnToast(String toastText) {
Toast toast = new Toast(mContext);
View warnView = LayoutInflater.from(mContext).inflate(
R.layout.toast_warn, null);
toast.setView(warnView);
toast.setGravity(Gravity.CENTER, 0, 0);// 起点位置为中间
toast.show();
}
// 开启录音计时线程
private void callRecordTimeThread() {
mRecordThread = new Thread(recordThread);
mRecordThread.start();
}
// 录音Dialog图片随录音音量大小切换
private void setDialogImage() {
if (voiceValue < 600.0) {
dialogImg.setImageResource(R.drawable.record_animate_01);
} else if (voiceValue > 600.0 && voiceValue < 1000.0) {
dialogImg.setImageResource(R.drawable.record_animate_02);
} else if (voiceValue > 1000.0 && voiceValue < 1200.0) {
dialogImg.setImageResource(R.drawable.record_animate_03);
} else if (voiceValue > 1200.0 && voiceValue < 1400.0) {
dialogImg.setImageResource(R.drawable.record_animate_04);
} else if (voiceValue > 1400.0 && voiceValue < 1600.0) {
dialogImg.setImageResource(R.drawable.record_animate_05);
} else if (voiceValue > 1600.0 && voiceValue < 1800.0) {
dialogImg.setImageResource(R.drawable.record_animate_06);
} else if (voiceValue > 1800.0 && voiceValue < 2000.0) {
dialogImg.setImageResource(R.drawable.record_animate_07);
} else if (voiceValue > 2000.0 && voiceValue < 3000.0) {
dialogImg.setImageResource(R.drawable.record_animate_08);
} else if (voiceValue > 3000.0 && voiceValue < 4000.0) {
dialogImg.setImageResource(R.drawable.record_animate_09);
} else if (voiceValue > 4000.0 && voiceValue < 6000.0) {
dialogImg.setImageResource(R.drawable.record_animate_10);
} else if (voiceValue > 6000.0 && voiceValue < 8000.0) {
dialogImg.setImageResource(R.drawable.record_animate_11);
} else if (voiceValue > 8000.0 && voiceValue < 10000.0) {
dialogImg.setImageResource(R.drawable.record_animate_12);
} else if (voiceValue > 10000.0 && voiceValue < 12000.0) {
dialogImg.setImageResource(R.drawable.record_animate_13);
} else if (voiceValue > 12000.0) {
dialogImg.setImageResource(R.drawable.record_animate_14);
}
}
// 录音线程
private Runnable recordThread = new Runnable() {
@Override
public void run() {
recodeTime = 0.0f;
while (recordState == RECORD_ON) {
{
try {
Thread.sleep(100);
recodeTime += 0.1;
// 获取音量,更新dialog
if (!isCanceled) {
voiceValue = mAudioRecorder.getAmplitude();
recordHandler.sendEmptyMessage(1);
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
};
@SuppressLint("HandlerLeak")
private Handler recordHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
setDialogImage();
}
};
@Override
public boolean onTouchEvent(MotionEvent event) {
// TODO Auto-generated method stub
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN: // 按下按钮
if (recordState != RECORD_ON) {
showVoiceDialog(0);
downY = event.getY();
if (mAudioRecorder != null) {
mAudioRecorder.ready();
recordState = RECORD_ON;
mAudioRecorder.start();
callRecordTimeThread();
}
}
break;
case MotionEvent.ACTION_MOVE: // 滑动手指
float moveY = event.getY();
if (downY - moveY > 50) {
isCanceled = true;
showVoiceDialog(1);
}
if (downY - moveY < 20) {
isCanceled = false;
showVoiceDialog(0);
}
break;
case MotionEvent.ACTION_UP: // 松开手指
if (recordState == RECORD_ON) {
recordState = RECORD_OFF;
if (mRecordDialog.isShowing()) {
mRecordDialog.dismiss();
}
mAudioRecorder.stop();
mRecordThread.interrupt();
voiceValue = 0.0;
if (isCanceled) {
mAudioRecorder.deleteOldFile();
} else {
if (recodeTime < MIN_RECORD_TIME) {
showWarnToast("时间太短 录音失败");
mAudioRecorder.deleteOldFile();
} else {
if (listener != null) {
listener.recordEnd(mAudioRecorder.getFilePath());
}
}
}
isCanceled = false;
this.setText("按住 说话");
}
break;
}
return true;
}
public interface RecordListener {
public void recordEnd(String filePath);
}
}
Dialog布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:background="@drawable/record_bg"
android:padding="20dp" >
<ImageView
android:id="@+id/record_dialog_img"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/record_dialog_txt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@android:color/white"
android:layout_marginTop="5dp" />
</LinearLayout>
录音时间太短的Toast布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/record_bg"
android:padding="20dp"
android:gravity="center"
android:orientation="vertical" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/voice_to_short" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@android:color/white"
android:textSize="15sp"
android:text="时间太短 录音失败" />
</LinearLayout>
自定义的Dialogstyle,对话框样式
<style name="Dialogstyle">
<item name="android:windowBackground">@android:color/transparent</item>
<item name="android:windowFrame">@null</item>
<item name="android:windowNoTitle">true</item>
<item name="android:windowIsFloating">true</item>
<item name="android:windowIsTranslucent">true</item>
<item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item>
<!-- 显示对话框时当前的屏幕是否变暗 -->
<item name="android:backgroundDimEnabled">false</item>
</style>
RecordStrategy 录音策略接口
package com.example.recordtest;
/**
* RecordStrategy 录音策略接口
* @author acer
*/
public interface RecordStrategy {
/**
* 在这里进行录音准备工作,重置录音文件名等
*/
public void ready();
/**
* 开始录音
*/
public void start();
/**
* 录音结束
*/
public void stop();
/**
* 录音失败时删除原来的旧文件
*/
public void deleteOldFile();
/**
* 获取录音音量的大小
* @return
*/
public double getAmplitude();
/**
* 返回录音文件完整路径
* @return
*/
public String getFilePath();
}
个人写的一个录音实践策略
package com.example.recordtest;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import android.media.MediaRecorder;
import android.os.Environment;
public class AudioRecorder implements RecordStrategy {
private MediaRecorder recorder;
private String fileName;
private String fileFolder = Environment.getExternalStorageDirectory()
.getPath() + "/TestRecord";
private boolean isRecording = false;
@Override
public void ready() {
// TODO Auto-generated method stub
File file = new File(fileFolder);
if (!file.exists()) {
file.mkdir();
}
fileName = getCurrentDate();
recorder = new MediaRecorder();
recorder.setOutputFile(fileFolder + "/" + fileName + ".amr");
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);// 设置MediaRecorder的音频源为麦克风
recorder.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR);// 设置MediaRecorder录制的音频格式
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);// 设置MediaRecorder录制音频的编码为amr
}
// 以当前时间作为文件名
private String getCurrentDate() {
SimpleDateFormat formatter = new SimpleDateFormat("yyyy_MM_dd_HHmmss");
Date curDate = new Date(System.currentTimeMillis());// 获取当前时间
String str = formatter.format(curDate);
return str;
}
@Override
public void start() {
// TODO Auto-generated method stub
if (!isRecording) {
try {
recorder.prepare();
recorder.start();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
isRecording = true;
}
}
@Override
public void stop() {
// TODO Auto-generated method stub
if (isRecording) {
recorder.stop();
recorder.release();
isRecording = false;
}
}
@Override
public void deleteOldFile() {
// TODO Auto-generated method stub
File file = new File(fileFolder + "/" + fileName + ".amr");
file.deleteOnExit();
}
@Override
public double getAmplitude() {
// TODO Auto-generated method stub
if (!isRecording) {
return 0;
}
return recorder.getMaxAmplitude();
}
@Override
public String getFilePath() {
// TODO Auto-generated method stub
return fileFolder + "/" + fileName + ".amr";
}
}
MainActivity
package com.example.recordtest;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
public class MainActivity extends Activity {
RecordButton button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (RecordButton) findViewById(R.id.btn_record);
button.setAudioRecord(new AudioRecorder());
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}