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Android录制声音文件(音频)并播放

2019-12-12 04:32:46
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本文实例为大家分享了Android录制音频文件的具体代码,供大家参考,具体内容如下

1、这个demo中没有对多次点击同一个声音文件做详细处理,偶尔会有崩溃,用的时候需要注意。

2、按住录音按钮录音过程中,只对竖直方向处理了一下,水平方向没写;

3、没有做删除某个声音文件的操作,但是测试的时候实现了功能,需要用到的话,在MainActivity―>onItemClick中的TODO中有详细说明;

4、这只是个demo,如果要在项目中使用,先写出demo,没问题了,再引入项目,在写成demo后,在真机上运行的时候,如果出现获取录音权限,最好选择“允许”,如果拒绝,可能会崩溃。

记得打开手机运行录音的权限

先来效果图:

目录结构:

1、添加权限:

 <uses-permission android:name="android.permission.RECORD_AUDIO"/> <uses-permission android:name="android.permission.WAKE_LOCK"/> <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS"/> <uses-permission android:name="android.permission.VIBRATE"/> <uses-permission android:name="android.permission.WRITE_SETTINGS"/> <uses-permission android:name="android.permission.INTERACT_ACROSS_USERS_FULL"/> <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> <uses-permission android:name="android.permission.CALL_PHONE"/> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />

2、新建MediaRecorderUtils,复制以下源码:

package com.chen.voicedemo;import android.media.MediaRecorder;import android.os.Handler;import android.util.Log;import android.widget.ImageView;import java.io.File;/** * 录音工具类 */public class MediaRecorderUtils { private static MediaRecorder recorder; static MediaRecorderUtils mediaRecorderUtils; static ImageView mimageView; private String path; /**  * 获得单例对象,传入一个显示音量大小的imageview对象,如不需要显示可以传null  */ public static MediaRecorderUtils getInstence(ImageView imageView) {  if (mediaRecorderUtils == null) {   mediaRecorderUtils = new MediaRecorderUtils();  }  mimageView = imageView;  return mediaRecorderUtils; } /**  * 获得音频路径  */ public String getPath() {  return path; } /**  * 初始化  */ private void init() {  recorder = new MediaRecorder();// new出MediaRecorder对象  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.   File file = new File(Utils.IMAGE_SDCARD_MADER);  if (!file.exists()) {   file.mkdirs();  }  path = Utils.IMAGE_SDCARD_MADER + Utils.getVoiceFileName() + "stock.amr";  recorder.setOutputFile(path);  // 设置录制好的音频文件保存路径   try {   recorder.prepare();// 准备录制   } catch (Exception e) {   e.printStackTrace();  } } /**  * 开始录音  */ public void MediaRecorderStart() {  init();  try {   recorder.start();   flag = true;   if (mimageView != null) {    updateMicStatus();   }  } catch (Exception e) {   e.printStackTrace();   Log.e("chen", "录制失败");  } } /**  * 停止录音  */ public void MediaRecorderStop() {  try {   recorder.stop();   recorder.release(); //释放资源   flag = false;   mimageView = null;   recorder = null;  } catch (Exception e) {   e.toString();  } } /**  * 删除已录制的音频  */ public void MediaRecorderDelete() {  File file = new File(path);  if (file.isFile()) {   file.delete();  }  file.exists(); } ; private final Handler mHandler = new Handler(); private Runnable mUpdateMicStatusTimer = new Runnable() {  public void run() {   updateMicStatus();  } }; private int BASE = 1; private int SPACE = 1000;// 间隔取样时间 private boolean flag = true; /**  * 更新话筒状态  */ private void updateMicStatus() {  if (recorder != null) {   double ratio = (double) recorder.getMaxAmplitude() / BASE;   double db = 0;// 分贝   if (ratio > 1) {    db = 20 * Math.log10(ratio);   }   int i = (int) db / 10;   switch (i) {    case 1:     mimageView.setImageResource(R.drawable.rc_ic_volume_1);     break;    case 2:     mimageView.setImageResource(R.drawable.rc_ic_volume_2);     break;    case 3:     mimageView.setImageResource(R.drawable.rc_ic_volume_3);     break;    case 4:     mimageView.setImageResource(R.drawable.rc_ic_volume_4);     break;    case 5:     mimageView.setImageResource(R.drawable.rc_ic_volume_5);     break;    case 6:     mimageView.setImageResource(R.drawable.rc_ic_volume_6);     break;    case 7:     mimageView.setImageResource(R.drawable.rc_ic_volume_7);     break;    case 8:     mimageView.setImageResource(R.drawable.rc_ic_volume_8);     break;   }   if (flag) {    mHandler.postDelayed(mUpdateMicStatusTimer, SPACE);   }  } }}

3、创建MyChronometer,复制以下代码

package com.chen.voicedemo;import android.annotation.SuppressLint;import android.content.Context;import android.os.Handler;import android.os.Message;import android.os.SystemClock;import android.util.AttributeSet;import android.view.accessibility.AccessibilityEvent;import android.view.accessibility.AccessibilityNodeInfo;import android.widget.TextView;public class MyChronometer extends TextView { private static final String TAG = "MyChronometer"; /**  * A callback that notifies when the MyChronometer has incremented on its  * own.  */ public interface OnMyChronometerTickListener {  /**   * Notification that the MyChronometer has changed.   */  void onMyChronometerTick(int time); } public interface OnMyChronometerTimeListener {  /**   * Notification that the MyChronometer has changed.   */  void OnMyChronometerTimeListener(int time); } private OnMyChronometerTimeListener OnMyChronometerTimeListener; private long mBase; private boolean mVisible; private boolean mStarted; private boolean mRunning; private OnMyChronometerTickListener mOnMyChronometerTickListener; private long now_time; private static final int TICK_WHAT = 2; /**  * Initialize this MyChronometer object. Sets the base to the current time.  */ public MyChronometer(Context context) {  this(context, null, 0); } /**  * Initialize with standard view layout information. Sets the base to the  * current time.  */ public MyChronometer(Context context, AttributeSet attrs) {  this(context, attrs, 0); } /**  * Initialize with standard view layout information and style. Sets the base  * to the current time.  */ public MyChronometer(Context context, AttributeSet attrs, int defStyle) {  super(context, attrs, defStyle);  init(); } private void init() {  mBase = SystemClock.elapsedRealtime();  updateText(mBase); } /**  * Set the time that the count-up timer is in reference to.  *  * @param base Use the {@link SystemClock#elapsedRealtime} time base.  */ public void setBase(long base) {  mBase = base;  updateText(SystemClock.elapsedRealtime()); } /**  * Sets the listener to be called when the MyChronometer changes.  *  * @param listener The listener.  */ public void setOnMyChronometerTickListener(OnMyChronometerTickListener listener) {  mOnMyChronometerTickListener = listener; } public void setOnMyChronometerTimeListener(OnMyChronometerTimeListener listener) {  OnMyChronometerTimeListener = listener; } /**  * Start counting up. This does not affect the base as set from  * {@link #setBase}, just the view display.  * <p/>  * MyChronometer works by regularly scheduling messages to the handler, even  * when the Widget is not visible. To make sure resource leaks do not occur,  * the user should make sure that each start() call has a reciprocal call to  * {@link #stop}.  */ public void start() {  mStarted = true;  updateRunning(); } /**  * Stop counting up. This does not affect the base as set from  * {@link #setBase}, just the view display.  * <p/>  * This stops the messages to the handler, effectively releasing resources  * that would be held as the MyChronometer is running, via {@link #start}.  */ public void stop() {  mStarted = false;  updateRunning();  now_time /= 10;  if (OnMyChronometerTimeListener != null) {   OnMyChronometerTimeListener.OnMyChronometerTimeListener((int) now_time);  } } @Override protected void onDetachedFromWindow() {  super.onDetachedFromWindow();  mVisible = false;  updateRunning(); } @Override protected void onWindowVisibilityChanged(int visibility) {  super.onWindowVisibilityChanged(visibility);  mVisible = visibility == VISIBLE;  updateRunning(); } private synchronized void updateText(long now) {  long seconds = now - mBase;  seconds /= 10;  now_time = seconds;  int time_m = (int) (seconds / 100);  if (mOnMyChronometerTickListener != null) {   mOnMyChronometerTickListener.onMyChronometerTick(time_m);  }  int time_s = (int) (seconds % 100);  setText(time_m + ""); } private void updateRunning() {  boolean running = mVisible && mStarted;  if (running != mRunning) {   if (running) {    updateText(SystemClock.elapsedRealtime());    mHandler.sendMessageDelayed(Message.obtain(mHandler, TICK_WHAT), 1000);   } else {    mHandler.removeMessages(TICK_WHAT);   }   mRunning = running;  } } private Handler mHandler = new Handler() {  public void handleMessage(Message m) {   if (mRunning) {    updateText(SystemClock.elapsedRealtime());    sendMessageDelayed(Message.obtain(this, TICK_WHAT), 1000);   }  } }; @SuppressLint("NewApi") @Override public void onInitializeAccessibilityEvent(AccessibilityEvent event) {  super.onInitializeAccessibilityEvent(event);  event.setClassName(MyChronometer.class.getName()); } @SuppressLint("NewApi") @Override public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {  super.onInitializeAccessibilityNodeInfo(info);  info.setClassName(MyChronometer.class.getName()); }}

4、创建工具类

package com.chen.voicedemo;

import android.Manifest;import android.content.Context;import android.content.pm.PackageManager;import android.os.Environment;import android.support.v4.content.ContextCompat;import android.widget.Toast;import java.io.File;import java.text.SimpleDateFormat;import java.util.ArrayList;/** * 工具 */public class Utils { /**  * SD卡下语音目录  */ public static final String IMAGE_SDCARD_MADER = Environment   .getExternalStorageDirectory()   + "/chen/voice/"; /**  * 检查录音权限6.0  */ public static boolean checkVoice(Context context) {  try {   if (ContextCompat.checkSelfPermission(context, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {    return false;   } else {    return true;   }  } catch (Exception e) {   return true;  } } private static Toast toast; /**  * 单例吐司  */ public static void showToast(Context context, String msg) {  if (toast == null) {   toast = Toast.makeText(context, msg, Toast.LENGTH_SHORT);  }  toast.setText(msg);  toast.show(); } /**  * 获取指定文件夹下的所有文件路径  *  * @param root 指定文件夹路径  * @return 指定文件夹下的所有文件  */ public static ArrayList<String> getVideoFiles(String root) {  if (root == null || root == "")   return null;  ArrayList<String> list = new ArrayList<>();  File file = new File(root);  File[] fileList = file.listFiles();  for (File f : fileList) {   list.add(f.getPath());  }  return list; } /**  * 获取声音文件名字  *  * @return 假如当前录制声音时间是2016年4月29号14点30分30秒。得到的文件名字就是20160429143030.这样保证文件名的唯一性  */ public static String getVoiceFileName() {  long getNowTimeLong = System.currentTimeMillis();  SimpleDateFormat time = new SimpleDateFormat("yyyyMMddHHmmss");  String result = time.format(getNowTimeLong);  return result; }}

5、MainActivity

package com.chen.voicedemo;import android.app.Activity;import android.graphics.drawable.AnimationDrawable;import android.graphics.drawable.ColorDrawable;import android.media.MediaPlayer;import android.os.Bundle;import android.os.SystemClock;import android.util.Log;import android.view.LayoutInflater;import android.view.MotionEvent;import android.view.View;import android.view.ViewGroup;import android.view.Window;import android.view.WindowManager;import android.widget.AdapterView;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.ListView;import android.widget.PopupWindow;import android.widget.TextView;import java.io.File;import java.util.ArrayList;import java.util.List;public class MainActivity extends Activity implements View.OnTouchListener, AdapterView.OnItemClickListener { /**  * 开始录音按钮  */ private TextView voice; /**  * 用于定位。使录音时展示的popupwindow,展示在该控件 的下面  */ private TextView voice_popup; /**  * 展示指定文件夹下所有录制的声音文件  */ private TextView show_voice_list; /**  * 展示目标文件夹下,所有已录制的声音路径  */ private ListView show_voices_listview; private List<String> voiceList; /**  * 停止播放声音  */ private TextView stop_show_voice; /**  * 播放声音时,动的图片  */ private ImageView voice_anim; /**  * 系统播放器  */ private MediaPlayer mediaPlayer; private Boolean flag = true; private float int_x = 0; private float int_y = 0; /**  * 用于限制最大录音时常。单位是秒。意义是:最大录60秒的音频,到了60秒的是,自动停止  */ private int maxRecordTime = 60; /**  * 用于显示频繁操作时间间隔。单位是毫秒。意义是:500毫秒内再次操作,就算是频频操作,做相应处理  */ private int oftenOperationTime = 500; private MyAdapter myAdapter; private AnimationDrawable animation; /**  * 录音popup  */ private PopupWindow voice_popupWindow; /**  * 录音时声音变化  */ private ImageView voice_shengyin; /**  * 录音计时器  */ private MyChronometer mychronometer; @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  requestWindowFeature(Window.FEATURE_NO_TITLE);  setContentView(R.layout.activity_main);  voiceList = new ArrayList<String>();  voice = (TextView) findViewById(R.id.voice);  voice_popup = (TextView) findViewById(R.id.voice_popup);  voice_anim = (ImageView) findViewById(R.id.voice_anim);  voice_anim.setImageResource(R.drawable.lcs_voice_receive);  show_voice_list = (TextView) findViewById(R.id.show_voice_list);  show_voice_list.setOnClickListener(new View.OnClickListener() {   @Override   public void onClick(View v) {    voiceList = Utils.getVideoFiles(Utils.IMAGE_SDCARD_MADER);    if (voiceList.size()>0){     myAdapter.notifyDataSetChanged();    }else{     Utils.showToast(MainActivity.this, "没有文件");    }   }  });  show_voices_listview = (ListView) findViewById(R.id.show_voices);  show_voices_listview.setOnItemClickListener(this);  myAdapter = new MyAdapter();  stop_show_voice = (TextView) findViewById(R.id.stop_show_voice);  /**   * 停止播放的监听器   */  stop_show_voice.setOnClickListener(new View.OnClickListener() {   @Override   public void onClick(View v) {    Log.e("chen", "点击了停止播放按钮");    if (mediaPlayer != null) {     if (mediaPlayer.isPlaying()) {      mediaPlayer.release();// 释放资源     }     mediaPlayer = null;    }    if (animation != null && animation.isRunning()) {     animation.stop();    }    voice_anim.setImageResource(R.drawable.lcs_voice_receive);   }  });  show_voices_listview.setAdapter(myAdapter);  voice.setOnTouchListener(this); } /**  * 声音文件列表的item点击事件,播放对应声音文件  *  * @param parent  * @param view  * @param position  * @param id  */ @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) {  //TODO 以下4行,是用来做测试,点击item,手机SD卡上对应路径下的声音文件就会被删除。如果录制声音失败,或者不满足条件,可以把以下4行写成一个工具方法调用,删除不满意的文件。这里不做详细演示  //File f_delete=new File(voiceList.get(position));  //f_delete.delete();  //voiceList.remove(voiceList.get(position));  //myAdapter.notifyDataSetChanged();  //TODO 以上4行,是用来做测试,点击item,手机SD卡上对应路径下的声音文件就会被删除。  try {   mediaPlayer = new MediaPlayer();   /**    * 播放过程中展示的动画    */   mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {    @Override    public void onPrepared(MediaPlayer mp) {     if (mp != null) {      mp.start();      voice_anim.setImageResource(R.drawable.voice_anim);     }    }   });   /**    * 播放完成监听    */   mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {    @Override    public void onCompletion(MediaPlayer mp) {     if (mp.isPlaying()) {      mp.release();// 释放资源     }     animation = (AnimationDrawable) voice_anim.getDrawable();     if (animation != null && animation.isRunning()) {      animation.stop();     }     voice_anim.setImageResource(R.drawable.lcs_voice_receive);    }   });   mediaPlayer.setDataSource(voiceList.get(position));   // 缓冲   mediaPlayer.prepare();  } catch (Exception e) {   Utils.showToast(MainActivity.this, "语音异常,加载失败");  } } /**  * 展示声音列表的adapter  */ class MyAdapter extends BaseAdapter {  @Override  public int getCount() {   return voiceList.size() == 0 ? 0 : voiceList.size();  }  @Override  public Object getItem(int position) {   return null;  }  @Override  public long getItemId(int position) {   return 0;  }  @Override  public View getView(int position, View convertView, ViewGroup parent) {   TextView tv = new TextView(MainActivity.this);   tv.setText(voiceList.get(position));   tv.setTextSize(20);   return tv;  } } /**  * 开始录制按钮的onTouch事件  *  * @param v  * @param event  * @return  */ @Override public boolean onTouch(View v, MotionEvent event) {  if (v.getId() == R.id.voice) {   //检查权限   if (!Utils.checkVoice(this)) {    if (event.getAction() == MotionEvent.ACTION_DOWN) {     Utils.showToast(this, "录音权限未打开,请打开录音权限!");    }    return true;   }   //避免短时间里频繁操作   if (!getTimeTF(SystemClock.elapsedRealtime()) && event.getAction() == MotionEvent.ACTION_DOWN) {    Utils.showToast(this, "操作过于频繁");    return true;   }   if (event.getAction() == MotionEvent.ACTION_DOWN) {    setTime(SystemClock.elapsedRealtime());   }   switch (event.getAction()) {    case MotionEvent.ACTION_DOWN:     int_x = event.getRawX();     int_y = event.getRawY();     VoicePopupWindow();     mychronometer.setBase(SystemClock.elapsedRealtime());     mychronometer.start();     MediaRecorderUtils.getInstence(voice_shengyin).MediaRecorderStart();     flag = true;     mychronometer.setOnMyChronometerTickListener(new MyChronometer.OnMyChronometerTickListener() {      @Override      public void onMyChronometerTick(int time) {       if (time == maxRecordTime || time > maxRecordTime) {        mychronometer.setText("60");        setVoiceToUp();       }      }     });     break;    case MotionEvent.ACTION_MOVE:     if (flag) {      if (Math.abs(int_y) - Math.abs(event.getRawY()) > 100.0 && flag) {       voice_popupWindow.dismiss();       mychronometer.stop();       MediaRecorderUtils.getInstence(voice_shengyin).MediaRecorderStop();       MediaRecorderUtils.getInstence(voice_shengyin).MediaRecorderDelete();       flag = false;      }     }     break;    case MotionEvent.ACTION_CANCEL:     if (flag) {      voice_popupWindow.dismiss();      mychronometer.stop();      MediaRecorderUtils.getInstence(voice_shengyin).MediaRecorderStop();     }     break;    case MotionEvent.ACTION_UP:     if (flag) {      setVoiceToUp();     }     break;   }   return true;  }  return false; } private long base_time = 0; private void setTime(long time) {  base_time = time; } private boolean getTimeTF(long time) {  int data = (int) (time - base_time) / oftenOperationTime;  if (data > 1) {   return true;  } else {   return false;  } } /**  * 声音popupwindow  */ public void VoicePopupWindow() {  View view = LayoutInflater.from(this).inflate(R.layout.voice_popupwindow, null);  voice_popupWindow = new PopupWindow(this);  voice_popupWindow.setWidth(WindowManager.LayoutParams.MATCH_PARENT);  voice_popupWindow.setHeight(WindowManager.LayoutParams.MATCH_PARENT);  voice_shengyin = (ImageView) view.findViewById(R.id.voice_shengyin);  mychronometer = (MyChronometer) view.findViewById(R.id.mychronometer);  voice_popupWindow.setContentView(view);  voice_popupWindow.setFocusable(true);  ColorDrawable dw = new ColorDrawable(0x00000000);  voice_popupWindow.setBackgroundDrawable(dw);  voice_popupWindow.showAsDropDown(voice_popup); } private void setVoiceToUp() {  flag = false;  voice_popupWindow.dismiss();  mychronometer.stop();  MediaRecorderUtils.getInstence(voice_shengyin).MediaRecorderStop();  int time = Integer.parseInt(mychronometer.getText().toString());  if (time != 0) {   File file = new File(MediaRecorderUtils.getInstence(voice_shengyin).getPath());   if (file.length() > 0) {    voiceList = Utils.getVideoFiles(Utils.IMAGE_SDCARD_MADER);    myAdapter.notifyDataSetChanged();   } else {    Utils.showToast(this, "录音失败,请检查权限");   }  } else {   Utils.showToast(this, "录音时间太短");  } }}

6、activity_main布局

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <TextView  android:id="@+id/voice_popup"  android:layout_width="match_parent"  android:layout_height="1dip"/> <ListView  android:id="@+id/show_voices"  android:layout_width="match_parent"  android:layout_height="0dp"  android:layout_weight="1"/> <RelativeLayout  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:orientation="horizontal">  <ImageView   android:id="@+id/voice_anim"   android:layout_width="60dp"   android:layout_height="30dp"   android:layout_centerVertical="true"   android:layout_marginLeft="30dp"   android:background="#00ff00"/>  <TextView   android:id="@+id/stop_show_voice"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_alignParentRight="true"   android:layout_centerVertical="true"   android:layout_gravity="center_horizontal"   android:layout_marginBottom="20dp"   android:layout_marginRight="20dp"   android:background="#00ff00"   android:padding="10dp"   android:text="停止播放"   android:textColor="#000000"   android:textSize="20sp"   />  <TextView   android:id="@+id/show_voice_list"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_centerVertical="true"   android:layout_gravity="center_horizontal"   android:layout_marginBottom="20dp"   android:layout_marginRight="20dp"   android:layout_toLeftOf="@id/stop_show_voice"   android:background="#00ff00"   android:padding="10dp"   android:text="列表"   android:textColor="#000000"   android:textSize="20sp"   /> </RelativeLayout> <TextView  android:id="@+id/voice"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:layout_gravity="center_horizontal"  android:background="#00ff00"  android:padding="10dp"  android:text="开始录音"  android:textColor="#000000"  android:textSize="25sp"/></LinearLayout>

7、voice_popupwindow布局代码:录音的时候,会出现以下图片中的popupwindow

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"> <LinearLayout  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:layout_centerInParent="true"  android:background="@android:color/black"  android:orientation="vertical"  android:paddingBottom="40dip"  android:paddingLeft="60dip"  android:paddingRight="60dip"  android:paddingTop="40dip">  <ImageView   android:id="@+id/voice_shengyin"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_gravity="center_horizontal"   android:src="@drawable/rc_ic_volume_1"/>  <com.chen.voicedemo.MyChronometer   android:id="@+id/mychronometer"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_centerHorizontal="true"   android:layout_gravity="center_horizontal"   android:textColor="@android:color/white"/> </LinearLayout></RelativeLayout>

8、还有一个动画布局,播放声音的时候,有个动画效果

<?xml version="1.0" encoding="utf-8"?><animation-list xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/volume_animation"    android:oneshot="false" > <item  android:drawable="@drawable/rc_ic_voice_receive_play1"  android:duration="100"/> <item  android:drawable="@drawable/rc_ic_voice_receive_play2"  android:duration="200"/> <item  android:drawable="@drawable/rc_ic_voice_receive_play3"  android:duration="300"/></animation-list>

附录:用到的图片资源说明:如果手上没有这样的图片,可以随便用其他图片代替,有效果,就算成功

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