Android自定义UI实现微信语音

<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:orientation="vertical" 
 tools:context="com.example.imooc_recorder.MainActivity" > 
 
 <ListView 
 android:id="@+id/id_listview" 
 android:layout_width="fill_parent" 
 android:layout_height="0dp" 
 android:layout_weight="1" 
 android:background="#ebebeb" 
 android:divider="@null" 
 android:dividerHeight="10dp" > 
 </ListView> 
 
 <FrameLayout 
 android:layout_width="fill_parent" 
 android:layout_height="wrap_content" > 
 <View 
  android:background="#ccc" 
  android:layout_width="fill_parent" 
  android:layout_height="1dp" /> 
 
 <com.example.recorder_view.AudioRecorderButton 
  android:id="@+id/id_recorder_button" 
  android:layout_width="fill_parent" 
  android:layout_height="wrap_content" 
  android:layout_marginBottom="7dp" 
  android:layout_marginLeft="50dp" 
  android:layout_marginRight="50dp" 
  android:layout_marginTop="6dp" 
  android:background="@drawable/button_recorder_normal" 
  android:gravity="center" 
  android:minHeight="0dp" 
  android:padding="5dp" 
  android:text="@string/str_recorder_nomal" 
  android:textColor="#727272" > 
 </com.example.recorder_view.AudioRecorderButton> 
 
 </FrameLayout> 
 
</LinearLayout> 

<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:background="@drawable/dialog_loading_bg" 
 android:gravity="center" 
 android:orientation="vertical" 
 android:padding="20dp" > 
 
 <LinearLayout 
 android:layout_width="wrap_content" 
 android:layout_height="wrap_content" 
 android:orientation="horizontal" > 
 
 <ImageView 
  android:id="@+id/id_recorder_dialog_icon" 
  android:layout_width="wrap_content" 
  android:layout_height="wrap_content" 
  android:src="@drawable/recorder" 
  android:visibility="visible" /> 
 
 <ImageView 
  android:id="@+id/id_recorder_dialog_voice" 
  android:layout_width="wrap_content" 
  android:layout_height="wrap_content" 
  android:src="@drawable/v1" 
  android:visibility="visible" /> 
 </LinearLayout> 
 
 <TextView 
 android:id="@+id/id_recorder_dialog_label" 
 android:layout_marginTop="5dp" 
 android:text="手指上滑，取消发送" 
 android:textColor="#ffffff" 
 android:layout_width="wrap_content" 
 android:layout_height="wrap_content"/> 
 
</LinearLayout> 

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
 xmlns:tools="http://schemas.android.com/tools" 
 android:layout_width="match_parent" 
 android:background="#eeeeee" 
 android:layout_height="60dp" 
 android:layout_marginTop="5dp" > 
 
 <ImageView 
 android:id="@+id/id_icon" 
 android:layout_width="40dp" 
 android:layout_height="40dp" 
 android:layout_alignParentRight="true" 
 android:layout_centerVertical="true" 
 android:layout_marginRight="5dp" 
 android:src="@drawable/icon" /> 
 
 <FrameLayout 
 android:id="@+id/id_recorder_length" 
 android:layout_width="wrap_content" 
 android:layout_height="wrap_content" 
 android:layout_centerVertical="true" 
 android:layout_toLeftOf="@id/id_icon" 
 android:background="@drawable/chatto_bg_focused" > 
 
 <View 
  android:id="@+id/id_recorder_anim" 
  android:layout_width="25dp" 
  android:layout_height="25dp" 
  android:layout_gravity="center_vertical|right" 
  android:background="@drawable/adj" /> 
 </FrameLayout> 
 
 <TextView 
 android:id="@+id/id_recorder_time" 
 android:layout_centerVertical="true" 
 android:layout_toLeftOf="@id/id_recorder_length" 
 android:layout_marginRight="3dp" 
 android:textColor="#ff777777" 
 android:text="" 
 android:layout_width="wrap_content" 
 android:layout_height="wrap_content" /> 
 
</RelativeLayout> 

<style name="Theme_AudioDialog" parent="@android:Theme.Dialog"> 
 <item name="android:windowBackground">@android:color/transparent</item> 
 <item name="android:windowFrame">@null</item> 
 <item name="android:windowIsFloating">true</item> 
  <item name="android:windowIsTranslucent">true</item> 
  <item name="android:backgroundDimEnabled">false</item> 
 
 </style> 

<?xml version="1.0" encoding="utf-8"?> 
<shape xmlns:android="http://schemas.android.com/apk/res/android" 
 android:shape="rectangle" > 
 
 <solid android:color="#ffffff"/> 
 <stroke android:width="1px" android:color="#9b9b9b"/> 
 <corners android:radius="3dp"/> 
</shape> 

<?xml version="1.0" encoding="utf-8"?> 
<shape xmlns:android="http://schemas.android.com/apk/res/android" 
 android:shape="rectangle" > 
 
 <solid android:color="#ffffff"/> 
 <stroke android:width="1px" android:color="#eeeeee"/> 
 <corners android:radius="3dp"/> 
</shape> 

<?xml version="1.0" encoding="utf-8"?> 
<animation-list xmlns:android="http://schemas.android.com/apk/res/android" > 
 
 <item 
 android:drawable="@drawable/v_anim1" 
 android:duration="300"> 
 </item> 
 <item 
 android:drawable="@drawable/v_anim2" 
 android:duration="300"> 
 </item> 
 
 <item 
 android:drawable="@drawable/v_anim3" 
 android:duration="300"> 
 </item> 
 
 
</animation-list> 

package com.example.imooc_recorder; 
 
import java.util.ArrayList; 
import java.util.List; 
 
import com.example.recorder_view.AudioRecorderButton; 
import com.example.recorder_view.AudioRecorderButton.AudioFinishRecorderListener; 
import com.example.recorder_view.MediaManager; 
 
import android.app.Activity; 
import android.graphics.drawable.AnimationDrawable; 
import android.media.MediaPlayer; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.AdapterView.OnItemClickListener; 
import android.widget.AdapterView; 
import android.widget.ArrayAdapter; 
import android.widget.ListView; 
 
public class MainActivity extends Activity { 
 
 private ListView mListView; 
 private ArrayAdapter<Recorder> mAdapter; 
 private List<Recorder> mDatas = new ArrayList<MainActivity.Recorder>(); 
 private AudioRecorderButton mAudioRecorderButton; 
 private View animView; 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
 super.onCreate(savedInstanceState); 
 setContentView(R.layout.activity_main); 
 mListView = (ListView) findViewById(R.id.id_listview); 
 mAudioRecorderButton = (AudioRecorderButton) findViewById(R.id.id_recorder_button); 
 //录音完毕，回调 
 mAudioRecorderButton.setAudioFinishRecorderListener(new AudioFinishRecorderListener() { 
  
  @Override 
  public void onFinish(float seconds, String filePath) { 
  // TODO Auto-generated method stub 
  Recorder recorder = new Recorder(seconds, filePath); 
  mDatas.add(recorder); 
  mAdapter.notifyDataSetChanged(); 
  mListView.setSelection(mDatas.size()-1); 
  } 
 }); 
 mAdapter = new RecorderAdapter(this, mDatas); 
 mListView.setAdapter(mAdapter); 
  
 mListView.setOnItemClickListener(new OnItemClickListener() { 
  @Override 
  public void onItemClick(AdapterView<?> parent, View view, 
   int position, long id) { 
  if (animView !=null) { 
   animView.setBackgroundResource(R.drawable.adj); 
   animView = null; 
   
 
  } 
  //播放动画 
  animView = view.findViewById(R.id.id_recorder_anim); 
  animView.setBackgroundResource(R.drawable.play_anim); 
  AnimationDrawable anim = (AnimationDrawable) animView.getBackground(); 
  anim.start(); 
  //播放音频 
  MediaManager.playSound(mDatas.get(position).filePath,new MediaPlayer.OnCompletionListener() { 
   
   @Override 
   public void onCompletion(MediaPlayer mp) { 
   // TODO Auto-generated method stub 
   animView.setBackgroundResource(R.drawable.adj); 
   } 
  }); 
  } 
 }); 
 } 
 
 @Override 
 protected void onPause() { 
 // TODO Auto-generated method stub 
 super.onPause(); 
 MediaManager.pause(); 
 } 
 @Override 
 protected void onResume() { 
 // TODO Auto-generated method stub 
 super.onResume(); 
 MediaManager.resume(); 
 } 
 @Override 
 protected void onDestroy() { 
 // TODO Auto-generated method stub 
 super.onDestroy(); 
 MediaManager.release(); 
 } 
 /**内部类*/ 
 class Recorder{ 
 float time; 
 String filePath; 
 public Recorder(float time, String filePath) { 
  super(); 
  this.time = time; 
  this.filePath = filePath; 
 } 
 public float getTime() { 
  return time; 
 } 
 public void setTime(float time) { 
  this.time = time; 
 } 
 public String getFilePath() { 
  return filePath; 
 } 
 public void setFilePath(String filePath) { 
  this.filePath = filePath; 
 } 
  
 } 
} 

package com.example.imooc_recorder; 
 
import java.util.List; 
 
import com.example.imooc_recorder.MainActivity.Recorder; 
 
import android.content.Context; 
import android.util.DisplayMetrics; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.view.WindowManager; 
import android.widget.ArrayAdapter; 
import android.widget.BaseAdapter; 
import android.widget.LinearLayout; 
import android.widget.TextView; 
 
public class RecorderAdapter extends ArrayAdapter<Recorder> { 
 
// private List<Recorder> mDatas; 
// private Context mContext; 
 private int mMinItemWidth; 
 private int mMaxItemWidth; 
 private LayoutInflater mInflater; 
 
 public RecorderAdapter(Context context, List<Recorder> datas) { 
 super(context, -1, datas); 
// mContext = context; 
// mDatas = datas; 
 WindowManager wm = (WindowManager) context 
  .getSystemService(Context.WINDOW_SERVICE); 
 DisplayMetrics outMetrics = new DisplayMetrics(); 
 wm.getDefaultDisplay().getMetrics(outMetrics); 
 
 mMaxItemWidth = (int) (outMetrics.widthPixels * 0.7f); 
 mMinItemWidth = (int) (outMetrics.widthPixels * 0.15f); 
 mInflater = LayoutInflater.from(context); 
 } 
 
 @Override 
 public View getView(int position, View convertView, ViewGroup parent) { 
 // TODO Auto-generated method stub 
 ViewHolder holder = null; 
 if (convertView == null) { 
  convertView = mInflater.inflate(R.layout.item_recorder, parent, 
   false); 
  holder = new ViewHolder(); 
  holder.seconds = (TextView) convertView.findViewById(R.id.id_recorder_time); 
  holder.length = convertView.findViewById(R.id.id_recorder_length); 
 
  convertView.setTag(holder); 
 }else { 
  holder = (ViewHolder) convertView.getTag(); 
 } 
 holder.seconds.setText(Math.round(getItem(position).time)+"\""); 
 ViewGroup.LayoutParams lp = holder.length.getLayoutParams(); 
 lp.width = (int) (mMinItemWidth +(mMaxItemWidth/60f*getItem(position).time)); 
 return convertView; 
 } 
 
 private class ViewHolder { 
 private TextView seconds; 
 private View length; 
 } 
} 

package com.example.recorder_view; 
 
import com.example.imooc_recorder.R; 
import com.example.recorder_view.AudioManager.AudioStateListener; 
 
import android.content.Context; 
import android.os.Environment; 
import android.os.Handler; 
import android.telephony.SignalStrength; 
import android.util.AttributeSet; 
import android.view.MotionEvent; 
import android.view.View; 
import android.widget.Button; 
 
public class AudioRecorderButton extends Button implements AudioStateListener { 
 private static final int DISTANCE_Y_CANCEL = 50; 
 
 /** 提示框管理工具类 */ 
 private DialogManager mDialogManager; 
 /** 正常、松开手指取消发送、手指上滑取消发送 */ 
 private static final int STATE_NORMAL = 1; 
 private static final int STATE_RECORDING = 2; 
 private static final int STATE_WANT_TO_CANCEL = 3; 
 /** 初始状态：正常 */ 
 private int mCurState = STATE_NORMAL; 
 /** 当前是否正在录音 */ 
 private boolean isRecording = false; 
 
 /** 录音工具类 */ 
 private AudioManager mAudioManager; 
 
 /** 录音总时间 */ 
 private float mTime; 
 
 /** 是否触发button */ 
 private boolean mReady; 
 
 /** *****************自定义Button************************************* */ 
 public AudioRecorderButton(Context context) { 
 super(context); 
 } 
 
 public AudioRecorderButton(Context context, AttributeSet attrs, int defStyle) { 
 super(context, attrs, defStyle); 
 } 
 
 public AudioRecorderButton(Context context, AttributeSet attrs) { 
 super(context, attrs); 
 mDialogManager = new DialogManager(getContext()); 
 String dir = Environment.getExternalStorageDirectory() 
  + "/imooc_recorder_audios"; 
 mAudioManager = AudioManager.getInstance(dir); 
 mAudioManager.setOnAudioStateListener(this); 
 /** 监听回调 */ 
 setOnLongClickListener(new OnLongClickListener() { 
 
  @Override 
  public boolean onLongClick(View v) { 
  mReady = true; 
  // 录音准备--准备好后，有实现接口方法 
  mAudioManager.prepareAndio(); 
  return false; 
  } 
 }); 
 } 
 
 /****************************************************** 
 * 完成录音准备的回调函数 
 */ 
 @Override 
 public void wellPrepared() { 
 // 准备完毕，发送消息 
 mHandler.sendEmptyMessage(MSG_AUDIO_PREPARE); 
 } 
 
 private Handler mHandler = new Handler() { 
 public void handleMessage(android.os.Message msg) { 
  switch (msg.what) { 
  case MSG_AUDIO_PREPARE: 
  mDialogManager.showRecordingDailog(); 
  isRecording = true; 
 
  new Thread(new Runnable() { 
 
   @Override 
   public void run() { 
 
   // TODO Auto-generated method stub 
   while (isRecording) { 
    try { 
    Thread.sleep(100); 
    // 录音计时 
    mTime += 0.1f; 
    mHandler.sendEmptyMessage(MSG_VOICE_CHANGED); 
    } catch (InterruptedException e) { 
    e.printStackTrace(); 
    } 
 
   } 
 
   } 
  }).start(); 
  break; 
  case MSG_VOICE_CHANGED: 
 
  mDialogManager.updateVoiceLeve(mAudioManager.getVoiceLevel(7)); 
 
  break; 
  case MSG_DIALOG_DIMISS: 
 
  mDialogManager.dimissDailog(); 
  break; 
 
  default: 
  break; 
  } 
  super.handleMessage(msg); 
 }; 
 }; 
 
 private static final int MSG_AUDIO_PREPARE = 0x110; 
 private static final int MSG_VOICE_CHANGED = 0x111; 
 private static final int MSG_DIALOG_DIMISS = 0x112; 
 
 @Override 
 public boolean onTouchEvent(MotionEvent event) { 
 // TODO Auto-generated method stub 
 int action = event.getAction(); 
 int x = (int) event.getX(); 
 int y = (int) event.getY(); 
 
 switch (action) { 
 case MotionEvent.ACTION_DOWN: 
  changeState(STATE_RECORDING); 
  break; 
 case MotionEvent.ACTION_MOVE: 
  if (isRecording) { 
  // 根据xy坐标。判断是否想要取消 
  if (wantToCancel(x, y)) { 
   changeState(STATE_WANT_TO_CANCEL); 
  } else { 
   changeState(STATE_RECORDING); 
  } 
 
  } 
  break; 
 case MotionEvent.ACTION_UP: 
  if (!mReady) { 
  // 没有触发onclick 
  reset(); 
  return super.onTouchEvent(event); 
 
  } 
  if (!isRecording || mTime < 0.6f) { 
  // prapred没有完成已经up了 
  mDialogManager.tooShort(); 
  mAudioManager.cancel(); 
  mHandler.sendEmptyMessageDelayed(MSG_DIALOG_DIMISS, 1300); 
 
  } else if (mCurState == STATE_RECORDING) { 
 
  mDialogManager.dimissDailog(); 
  mAudioManager.release(); 
  if (audioFinishRecorderListener != null) { 
   audioFinishRecorderListener.onFinish(mTime, 
    mAudioManager.getCurrentFilePath()); 
  } 
  } else if (mCurState == STATE_WANT_TO_CANCEL) { 
  mDialogManager.dimissDailog(); 
  mAudioManager.cancel(); 
  } 
  // 恢复标志位 
  reset(); 
  break; 
 
 default: 
  break; 
 } 
 return super.onTouchEvent(event); 
 } 
 
 private void reset() { 
 // TODO Auto-generated method stub 
 mReady = false; 
 mTime = 0; 
 isRecording = false; 
 changeState(STATE_NORMAL); 
 } 
 
 private boolean wantToCancel(int x, int y) { 
 // x<0代表来到按钮的范围以外 
 if (x < 0 || x > getWidth()) { 
  return true; 
 
 } 
 if (y < -DISTANCE_Y_CANCEL || y > getHeight() + DISTANCE_Y_CANCEL) { 
  return true; 
 
 } 
 return false; 
 } 
 
 private void changeState(int state) { 
 // TODO Auto-generated method stub 
 if (mCurState != state) { 
  mCurState = state; 
 
  switch (state) { 
  case STATE_NORMAL: 
  setBackgroundResource(R.drawable.button_recorder_normal); 
  setText(R.string.str_recorder_nomal); 
  break; 
 
  case STATE_RECORDING: 
  setBackgroundResource(R.drawable.button_recorder_recording); 
  setText(R.string.str_recorder_recording); 
  if (isRecording) { 
   // to do 
   mDialogManager.recording(); 
  } 
  break; 
 
  case STATE_WANT_TO_CANCEL: 
  setBackgroundResource(R.drawable.button_recorder_recording); 
  setText(R.string.str_recorder_want_cancel); 
  mDialogManager.wantToCancle(); 
  break; 
  default: 
  break; 
  } 
 } 
 } 
 
 /** 完成录音回调 */ 
 public interface AudioFinishRecorderListener { 
 void onFinish(float seconds, String filePath); 
 } 
 
 private AudioFinishRecorderListener audioFinishRecorderListener; 
 
 public void setAudioFinishRecorderListener( 
  AudioFinishRecorderListener audioFinishRecorderListener) { 
 this.audioFinishRecorderListener = audioFinishRecorderListener; 
 } 
} 

package com.example.recorder_view; 
 
import com.example.imooc_recorder.R; 
 
import android.app.Dialog; 
import android.content.Context; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.widget.ImageView; 
import android.widget.TextView; 
 
public class DialogManager { 
 private Dialog mDialog; 
 private ImageView mIcon; 
 private ImageView mVoice; 
 private TextView mLabel; 
 private Context mContext; 
 
 public DialogManager(Context context) { 
 this.mContext = context; 
 } 
 
 public void showRecordingDailog() { 
 mDialog = new Dialog(mContext, R.style.Theme_AudioDialog); 
 LayoutInflater inflater = LayoutInflater.from(mContext); 
 View view = inflater.inflate(R.layout.dialog_recorder, null); 
 mDialog.setContentView(view); 
 
 mIcon = (ImageView) mDialog.findViewById(R.id.id_recorder_dialog_icon); 
 mVoice = (ImageView) mDialog 
  .findViewById(R.id.id_recorder_dialog_voice); 
 mLabel = (TextView) mDialog.findViewById(R.id.id_recorder_dialog_label); 
 
 mDialog.show(); 
 } 
 
 public void recording() { 
 if (mDialog != null && mDialog.isShowing()) { 
  mIcon.setVisibility(View.VISIBLE); 
  mVoice.setVisibility(View.VISIBLE); 
  mLabel.setVisibility(View.VISIBLE); 
 
  mIcon.setImageResource(R.drawable.recorder); 
  mLabel.setText("手指上滑，取消发送"); 
 
 } 
 } 
 
 public void wantToCancle() { 
 if (mDialog != null && mDialog.isShowing()) { 
  mIcon.setVisibility(View.VISIBLE); 
  mVoice.setVisibility(View.GONE); 
  mLabel.setVisibility(View.VISIBLE); 
 
  mIcon.setImageResource(R.drawable.cancel); 
  mLabel.setText("松开手指，取消发送"); 
 
 } 
 } 
 
 public void tooShort() { 
 if (mDialog != null && mDialog.isShowing()) { 
  mIcon.setVisibility(View.VISIBLE); 
  mVoice.setVisibility(View.GONE); 
  mLabel.setVisibility(View.VISIBLE); 
 
  mIcon.setImageResource(R.drawable.voice_to_short); 
  mLabel.setText("录音时间过短"); 
 
 } 
 
 } 
 
 public void dimissDailog() { 
 if (mDialog != null && mDialog.isShowing()) { 
  mDialog.dismiss(); 
  mDialog = null; 
 } 
 } 
 
 public void updateVoiceLeve(int level) { 
 if (mDialog != null && mDialog.isShowing()) { 
//  mIcon.setVisibility(View.VISIBLE); 
//  mVoice.setVisibility(View.VISIBLE); 
//  mLabel.setVisibility(View.VISIBLE); 
 
  // 通过方法名字，找到资源 
  int resId = mContext.getResources().getIdentifier("v" + level, 
   "drawable", mContext.getPackageName()); 
  mVoice.setImageResource(resId); 
 } 
 } 
 
} 

package com.example.recorder_view; 
 
import java.io.File; 
import java.io.IOException; 
import java.util.UUID; 
 
import javax.security.auth.PrivateCredentialPermission; 
 
import android.R.integer; 
import android.media.MediaRecorder; 
 
public class AudioManager { 
 
 private MediaRecorder mMediaRecorder; 
 private String mDir; 
 private String mCurrentFilepath; 
 private static AudioManager mInstance; 
 
 private boolean isPrepare; 
 
 /** 接口回调 */ 
 public interface AudioStateListener { 
 void wellPrepared(); 
 } 
 
 public AudioStateListener mAudioStateListener; 
 
 public void setOnAudioStateListener(AudioStateListener audioStateListener) { 
 mAudioStateListener = audioStateListener; 
 
 } 
 
 private AudioManager(String dir) { 
 this.mDir = dir; 
 } 
 
 public static AudioManager getInstance(String dir) { 
 if (mInstance == null) { 
  synchronized (AudioManager.class) { 
  if (mInstance == null) { 
   mInstance = new AudioManager(dir); 
 
  } 
 
  } 
 } 
 return mInstance; 
 } 
 
 public void prepareAndio() { 
 isPrepare = false; 
 File dir = new File(mDir); 
 if (!dir.exists()) { 
  dir.mkdirs(); 
 } 
 String fileName = geneFileName(); 
 
 File file = new File(dir, fileName); 
 mCurrentFilepath = file.getAbsolutePath(); 
 mMediaRecorder = new MediaRecorder(); 
 // 设置输出文件 
 mMediaRecorder.setOutputFile(file.getAbsolutePath()); 
 // 音频源头 
 mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
 // 设置音频格式 
 mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR); 
 // 设置音频编码 
 mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); 
 try { 
  mMediaRecorder.prepare(); 
  mMediaRecorder.start(); 
  isPrepare = true; 
  if (mAudioStateListener != null) { 
  mAudioStateListener.wellPrepared(); 
 
  } 
 } catch (Exception e) { 
  // TODO Auto-generated catch block 
  e.printStackTrace(); 
 } 
 } 
 
 private String geneFileName() { 
 return UUID.randomUUID().toString() + ".amr"; 
 } 
 
 public int getVoiceLevel(int maxLevel) { 
 if (isPrepare) { 
  try { 
  // mMediaRecorder.getMaxAmplitude() 1~32767 
  // return maxlevel*mMediaRecorder.getMaxAmplitude()/32768+1; 
  return maxLevel * new MediaRecorder().getMaxAmplitude() / 32768 
   + 1; 
  } catch (Exception e) { 
  } 
 
 } 
 return 1; 
 } 
 
 public void release() { 
 mMediaRecorder.release(); 
 mMediaRecorder = null; 
 } 
 
 public void cancel() { 
 release(); 
 if (mCurrentFilepath != null) { 
  File file = new File(mCurrentFilepath); 
  file.delete(); 
  mCurrentFilepath = null; 
 
 } 
 } 
 
 public String getCurrentFilePath() { 
 // TODO Auto-generated method stub 
 return mCurrentFilepath; 
 } 
 
} 

package com.example.recorder_view; 
 
import java.io.IOException; 
 
import android.media.AudioManager; 
import android.media.MediaPlayer; 
import android.media.MediaPlayer.OnCompletionListener; 
import android.media.MediaPlayer.OnErrorListener; 
 
public class MediaManager { 
 
 private static MediaPlayer mediaPlayer; 
 private static boolean isPause; 
 public static void playSound(String filePath, 
  OnCompletionListener onCompletionListener) { 
 if (mediaPlayer == null) { 
  mediaPlayer = new MediaPlayer(); 
  mediaPlayer.setOnErrorListener(new OnErrorListener() { 
   
  @Override 
  public boolean onError(MediaPlayer mp, int what, int extra) { 
   mediaPlayer.reset(); 
   return false; 
  } 
  }); 
 }else { 
  mediaPlayer.reset(); 
 } 
 try { 
  mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); 
  mediaPlayer.setOnCompletionListener(onCompletionListener); 
  mediaPlayer.setDataSource(filePath); 
  mediaPlayer.prepare(); 
 } catch (Exception e) { 
  e.printStackTrace(); 
 } 
 mediaPlayer.start(); 
 } 
 
 
 public static void pause(){ 
 if (mediaPlayer!=null && mediaPlayer.isPlaying()) { 
  mediaPlayer.pause(); 
  isPause = true; 
 } 
 } 
 public static void resume(){ 
 if (mediaPlayer!=null && isPause) { 
  mediaPlayer.start(); 
  isPause = false; 
 } 
 } 
 public static void release(){ 
 if (mediaPlayer!=null) { 
  mediaPlayer.release(); 
  mediaPlayer = null; 
  
 } 
 } 
}