项目效果如下：

项目目录结构如下：

代码如下：

AudioManager.java

package com.xuliugen.weichat;

import java.io.File;
import java.io.IOException;
import java.util.UUID;

import android.media.MediaRecorder;

public class AudioManager {
    private MediaRecorder mMediaRecorder;
    private String mDir;
    private String mCurrentFilePath;

    private static AudioManager mInstance;

    private boolean isPrepare;

    private AudioManager(String dir) {
        mDir = dir;
    }

    public static AudioManager getInstance(String dir) {
        if (mInstance == null) {
            synchronized (AudioManager.class) {
                if (mInstance == null) {
                    mInstance = new AudioManager(dir);
                }
            }
        }
        return mInstance;
    }

    /**
     * 使用接口 用于回调
     */
    public interface AudioStateListener {
        void wellPrepared();
    }

    public AudioStateListener mAudioStateListener;

    /**
     * 回调方法
     */
    public void setOnAudioStateListener(AudioStateListener listener) {
        mAudioStateListener = listener;
    }

    // 去准备
    public void prepareAudio() {
        try {
            isPrepare = false;
            File dir = new File(mDir);
            if (!dir.exists()) {
                dir.mkdirs();
            }
            String fileName = generateFileName();
            File file = new File(dir, fileName);

            mCurrentFilePath =file.getAbsolutePath();

            mMediaRecorder = new MediaRecorder();
            // 设置输出文件
            mMediaRecorder.setOutputFile(dir.getAbsolutePath());
            // 设置MediaRecorder的音频源为麦克风
            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);

            // 准备录音
            mMediaRecorder.prepare();
            // 开始
            mMediaRecorder.start();
            // 准备结束
            isPrepare = true;
            if (mAudioStateListener != null) {
                mAudioStateListener.wellPrepared();
            }

        } catch (IllegalStateException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    /**
     * 随机生成文件的名称
     */
    private String generateFileName() {
        return UUID.randomUUID().toString() + ".amr";
    }

    public int getVoiceLevel(int maxlevel) {
        if (isPrepare) {
            try {
                // mMediaRecorder.getMaxAmplitude() 1~32767
                return maxlevel * mMediaRecorder.getMaxAmplitude() / 32768 + 1;
            } catch (Exception e) {
            }
        }
        return 1;
    }

    /**
     * 释放资源
     */
    public void release() {
        //mMediaRecorder.stop();
        mMediaRecorder.reset();
        mMediaRecorder = null;
    }

    /**
     * 取消录音
     */
    public void cancel() {
        release();
        if (mCurrentFilePath != null) {
            File file = new File(mCurrentFilePath);
            file.delete();
            mCurrentFilePath = null;
        }

    }

    public String getCurrentFilePath() {

        return mCurrentFilePath;
    }
}

AudioRecorderButton.java

package com.xuliugen.weichat;

import android.content.Context;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;

import com.xuliugen.weichat.R;
import com.xuliugen.weichat.AudioManager.AudioStateListener;

public class AudioRecorderButton extends Button {

    private static final int STATE_NORMAL = 1;// 默认的状态
    private static final int STATE_RECORDING = 2;// 正在录音
    private static final int STATE_WANT_TO_CANCEL = 3;// 希望取消

    private int mCurrentState = STATE_NORMAL; // 当前的状态
    private boolean isRecording = false;// 已经开始录音

    private static final int DISTANCE_Y_CANCEL = 50;

    private DialogManager mDialogManager;
    private AudioManager mAudioManager;

    private float mTime;
    // 是否触发longClick
    private boolean mReady;

    private static final int MSG_AUDIO_PREPARED = 0x110;
    private static final int MSG_VOICE_CHANGED = 0x111;
    private static final int MSG_DIALOG_DIMISS = 0x112;

    /*
     * 获取音量大小的线程
     */
    private Runnable mGetVoiceLevelRunnable = new Runnable() {

        public void run() {
            while (isRecording) {
                try {
                    Thread.sleep(100);
                    mTime += 0.1f;
                    mHandler.sendEmptyMessage(MSG_VOICE_CHANGED);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    };

    private Handler mHandler = new Handler() {

        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
            case MSG_AUDIO_PREPARED:
                // 显示對話框在开始录音以后
                mDialogManager.showRecordingDialog();
                isRecording = true;
                // 开启一个线程
                new Thread(mGetVoiceLevelRunnable).start();
                break;

            case MSG_VOICE_CHANGED:
                mDialogManager.updateVoiceLevel(mAudioManager.getVoiceLevel(7));
                break;

            case MSG_DIALOG_DIMISS:
                mDialogManager.dimissDialog();
                break;

            }

            super.handleMessage(msg);
        }
    };

    /**
     * 以下2个方法是构造方法
     */
    public AudioRecorderButton(Context context, AttributeSet attrs) {
        super(context, attrs);
        mDialogManager = new DialogManager(context);

        String dir = "/storage/sdcard0/my_weixin";
        //String dir = Environment.getExternalStorageDirectory()+"/my_weixin";

        mAudioManager = AudioManager.getInstance(dir);
        mAudioManager.setOnAudioStateListener(new AudioStateListener() {

            public void wellPrepared() {
                mHandler.sendEmptyMessage(MSG_AUDIO_PREPARED);
            }
        });

        // 由于这个类是button所以在构造方法中添加监听事件
        setOnLongClickListener(new OnLongClickListener() {

            public boolean onLongClick(View v) {
                mReady = true;

                mAudioManager.prepareAudio();

                return false;
            }
        });
    }

    public AudioRecorderButton(Context context) {
        this(context, null);
    }

    /**
     * 录音完成后的回调
     */
    public interface AudioFinishRecorderListener {
        void onFinish(float seconds, String filePath);
    }

    private AudioFinishRecorderListener audioFinishRecorderListener;

    public void setAudioFinishRecorderListener(AudioFinishRecorderListener listener) {
        audioFinishRecorderListener = listener;
    }

    /**
     * 屏幕的触摸事件
     */
    @Override
    public boolean onTouchEvent(MotionEvent event) {

        int action = event.getAction();
        int x = (int) event.getX();// 获得x轴坐标
        int y = (int) event.getY();// 获得y轴坐标

        switch (action) {
        case MotionEvent.ACTION_DOWN:
            changeState(STATE_RECORDING);
            break;
        case MotionEvent.ACTION_MOVE:

            if (isRecording) {
                // 如果想要取消，根据x,y的坐标看是否需要取消
                if (wantToCancle(x, y)) {
                    changeState(STATE_WANT_TO_CANCEL);
                } else {
                    changeState(STATE_RECORDING);
                }
            }

            break;
        case MotionEvent.ACTION_UP:
            if (!mReady) {
                reset();
                return super.onTouchEvent(event);
            }
            if (!isRecording || mTime < 0.6f) {
                mDialogManager.tooShort();
                mAudioManager.cancel();
                mHandler.sendEmptyMessageDelayed(MSG_DIALOG_DIMISS, 1000);// 延迟显示对话框
            } else if (mCurrentState == STATE_RECORDING) { // 正在录音的时候，结束
                mDialogManager.dimissDialog();
                mAudioManager.release();

                if (audioFinishRecorderListener != null) {
                    audioFinishRecorderListener.onFinish(mTime,mAudioManager.getCurrentFilePath());
                }

            } else if (mCurrentState == STATE_WANT_TO_CANCEL) { // 想要取消
                mDialogManager.dimissDialog();
                mAudioManager.cancel();
            }
            reset();
            break;

        }
        return super.onTouchEvent(event);
    }

    /**
     * 恢复状态及标志位
     */
    private void reset() {
        isRecording = false;
        mTime = 0;
        mReady = false;
        changeState(STATE_NORMAL);
    }

    private boolean wantToCancle(int x, int y) {
        if (x < 0 || x > getWidth()) { // 超过按钮的宽度
            return true;
        }
        // 超过按钮的高度
        if (y < -DISTANCE_Y_CANCEL || y > getHeight() + DISTANCE_Y_CANCEL) {
            return true;
        }

        return false;
    }

    /**
     * 改变
     */
    private void changeState(int state) {
        if (mCurrentState != state) {
            mCurrentState = state;
            switch (state) {
            case STATE_NORMAL:
                setBackgroundResource(R.drawable.btn_recorder_normal);
                setText(R.string.str_recorder_normal);
                break;

            case STATE_RECORDING:
                setBackgroundResource(R.drawable.btn_recorder_recording);
                setText(R.string.str_recorder_recording);
                if (isRecording) {
                    mDialogManager.recording();
                }
                break;

            case STATE_WANT_TO_CANCEL:
                setBackgroundResource(R.drawable.btn_recorder_recording);
                setText(R.string.str_recorder_want_cancel);

                mDialogManager.wantToCancel();
                break;
            }
        }
    }
}

DialogManager.java

package com.xuliugen.weichat;

import android.app.AlertDialog;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

import com.xuliugen.weichat.R;

/**
 * 用于管理Dialog
 * 
 * @author xuliugen
 * 
 */
public class DialogManager {

    private AlertDialog.Builder builder;
    private ImageView mIcon;
    private ImageView mVoice;
    private TextView mLable;

    private Context mContext;

     private AlertDialog dialog;//用于取消AlertDialog.Builder

    /**
     * 构造方法 传入上下文
     */
    public DialogManager(Context context) {
        this.mContext = context;
    }

    // 显示录音的对话框
    public void showRecordingDialog() {

        builder = new AlertDialog.Builder(mContext, R.style.AudioDialog);
        LayoutInflater inflater = LayoutInflater.from(mContext);
        View view = inflater.inflate(R.layout.dialog_recorder,null);

        mIcon = (ImageView) view.findViewById(R.id.id_recorder_dialog_icon);
        mVoice = (ImageView) view.findViewById(R.id.id_recorder_dialog_voice);
        mLable = (TextView) view.findViewById(R.id.id_recorder_dialog_label);

        builder.setView(view);
        builder.create();
        dialog = builder.show();
    }

    public void recording(){
        if(dialog != null && dialog.isShowing()){ //显示状态
            mIcon.setVisibility(View.VISIBLE);
            mVoice.setVisibility(View.VISIBLE);
            mLable.setVisibility(View.VISIBLE);

            mIcon.setImageResource(R.drawable.recorder);
            mLable.setText("手指上滑，取消发送");
        }
    }

    // 显示想取消的对话框
    public void wantToCancel() {
        if(dialog != null && dialog.isShowing()){ //显示状态
            mIcon.setVisibility(View.VISIBLE);
            mVoice.setVisibility(View.GONE);
            mLable.setVisibility(View.VISIBLE);

            mIcon.setImageResource(R.drawable.cancel);
            mLable.setText("松开手指，取消发送");
        }
    }

    // 显示时间过短的对话框
    public void tooShort() {
        if(dialog != null && dialog.isShowing()){ //显示状态
            mIcon.setVisibility(View.VISIBLE);
            mVoice.setVisibility(View.GONE);
            mLable.setVisibility(View.VISIBLE);

            mIcon.setImageResource(R.drawable.voice_to_short);
            mLable.setText("录音时间过短");
        }
    }

    // 显示取消的对话框
    public void dimissDialog() {
        if(dialog != null && dialog.isShowing()){ //显示状态
            dialog.dismiss();
            dialog = null;
        }
    }

    // 显示更新音量级别的对话框
    public void updateVoiceLevel(int level) {
        if(dialog != null && dialog.isShowing()){ //显示状态
//          mIcon.setVisibility(View.VISIBLE);
//          mVoice.setVisibility(View.VISIBLE);
//          mLable.setVisibility(View.VISIBLE);

            //设置图片的id
            int resId = mContext.getResources().getIdentifier("v"+level, "drawable", mContext.getPackageName());
            mVoice.setImageResource(resId);
        }
    }

}

MainActivity.java

package com.xuliugen.weichat;

import java.util.ArrayList;
import java.util.List;

import com.xuliugen.weichat.AudioRecorderButton.AudioFinishRecorderListener;

import android.app.Activity;
import android.graphics.drawable.AnimationDrawable;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.AdapterView.OnItemClickListener;

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);


        mAudioRecorderButton.setAudioFinishRecorderListener(new AudioFinishRecorderListener() {

            public void onFinish(float seconds, String filePath) {
                Recorder recorder = new Recorder(seconds, filePath);
                mDatas.add(recorder);
                mAdapter.notifyDataSetChanged(); //通知更新的内容
                mListView.setSelection(mDatas.size() - 1); //将lisview设置为最后一个
            }
        });

        mAdapter = new RecoderAdapter(this, mDatas);
        mListView.setAdapter(mAdapter);

        //listView的item点击事件
        mListView.setOnItemClickListener(new OnItemClickListener() {

            public void onItemClick(AdapterView<?> arg0, View view,int position, long id) {
                // 播放动画（帧动画）
                if (animView != null) {
                    animView.setBackgroundResource(R.drawable.adj);
                    animView = null;
                }
                animView = view.findViewById(R.id.id_recoder_anim);
                animView.setBackgroundResource(R.drawable.play_anim);
                AnimationDrawable animation = (AnimationDrawable) animView.getBackground();
                animation.start();
                // 播放录音
                MediaManager.playSound(mDatas.get(position).filePath,new MediaPlayer.OnCompletionListener() {

                        public void onCompletion(MediaPlayer mp) {
                            animView.setBackgroundResource(R.drawable.adj);
                        }
                    });
            }
        });
    }

    @Override
    protected void onPause() {
        super.onPause();
        MediaManager.pause();
    }

    @Override
    protected void onResume() {
        super.onResume();
        MediaManager.resume();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        MediaManager.release();
    }

    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;
        }

    }

}

MediaManager.java

package com.xuliugen.weichat;

import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnErrorListener;

public class MediaManager {

    private static MediaPlayer mMediaPlayer; 
    private static boolean isPause;

    /**
     * 播放音乐
     * @param filePath
     * @param onCompletionListener
     */
    public static void playSound(String filePath,OnCompletionListener onCompletionListener) {
        if (mMediaPlayer == null) {
            mMediaPlayer = new MediaPlayer();

            //设置一个error监听器
            mMediaPlayer.setOnErrorListener(new OnErrorListener() {

                public boolean onError(MediaPlayer arg0, int arg1, int arg2) {
                    mMediaPlayer.reset();
                    return false;
                }
            });
        } else {
            mMediaPlayer.reset();
        }

        try {
            mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
            mMediaPlayer.setOnCompletionListener(onCompletionListener);
            mMediaPlayer.setDataSource(filePath);
            mMediaPlayer.prepare();
            mMediaPlayer.start();
        } catch (Exception e) {

        }
    }

    /**
     * 暂停播放
     */
    public static void pause() {
        if (mMediaPlayer != null && mMediaPlayer.isPlaying()) { //正在播放的时候
            mMediaPlayer.pause();
            isPause = true;
        }
    }

    /**
     * 当前是isPause状态
     */
    public static void resume() {
        if (mMediaPlayer != null && isPause) {  
            mMediaPlayer.start();
            isPause = false;
        }
    }

    /**
     * 释放资源
     */
    public static void release() {
        if (mMediaPlayer != null) {
            mMediaPlayer.release();
            mMediaPlayer = null;
        }
    }
}

RecoderAdapter.java

package com.xuliugen.weichat;

import java.util.List;

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.TextView;

import com.xuliugen.weichat.MainActivity.Recorder;

public class RecoderAdapter extends ArrayAdapter<Recorder> {

    private Context mContext;
    private List<Recorder> mDatas;

    private int mMinItemWidth; //最小的item宽度
    private int mMaxItemWidth; //最大的item宽度
    private LayoutInflater mInflater;

    public RecoderAdapter(Context context, List<Recorder> datas) {
        super(context, -1, datas);

        mContext = context;
        mDatas = datas;

        //获取屏幕的宽度
        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);
    }

    /**
     * 定义一个ViewHolder
     */
    private class ViewHolder {
        TextView seconds; // 时间
        View length; // 长度
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.item_recoder, parent,false);
            holder = new ViewHolder();
            holder.seconds = (TextView) convertView.findViewById(R.id.id_recoder_time);
            holder.length = convertView.findViewById(R.id.id_recoder_lenght);

            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;
    }
}

完整项目下载地址：http://download.csdn.net/detail/u010870518/8655667