简单的录音功能，通过图片切换实现声音大小的显示

简单的记录下一个录音功能，通过切换图片实现声音大小的变化。记得增加权限

RECORD_AUDIO

package com.bigzone.zuoyou.reception.service;import android.app.Service;import android.content.Intent;import android.media.MediaRecorder;import android.os.Binder;import android.os.Environment;import android.os.Handler;import android.os.IBinder;import android.util.Log;import com.bigzone.zuoyou.utils.CommonUtil;import java.io.File;import java.io.IOException;import java.util.Random;/** * Created by haohongwei on 2017/8/4. */public class RecordService extends Service {    private static String TAG = "RecordService";    private MediaRecorder recorder;    private String path;    public double db = 0;    public class MyBinder extends Binder {        public RecordService getService() {            return RecordService.this;        }    }    //通过binder实现了 调用者（client）与 service之间的通信    private MyBinder binder = new MyBinder();    private final Random generator = new Random();    @Override    public void onCreate() {        super.onCreate();    }    @Override    public IBinder onBind(Intent intent) {        startRecord(intent.getStringExtra("name"));        return binder;    }    @Override    public boolean onUnbind(Intent intent) {        stopRecord();        return false;    }    @Override    public int onStartCommand(Intent intent, int flags, int startId) {        return START_NOT_STICKY;    }    @Override    public void onDestroy() {        super.onDestroy();    }    //在Service中暴露出去的方法，供client调用      public double getRandomNumber() {        return db;    }    private void stopRecord() {        if (recorder != null) {            recorder.stop();            recorder.release();            recorder = null;        }    }    private void startRecord(String name) {        path = CommonUtil.getSDPath() + "/voice/" + name + ".amr";        recorder = new MediaRecorder();        recorder.setAudioSource(MediaRecorder.AudioSource.MIC);        recorder.setOutputFormat(MediaRecorder.OutputFormat.AMR_NB);        recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);        recorder.setOutputFile(path);        try {            recorder.prepare();            recorder.start();        } catch (IOException e) {            e.printStackTrace();        }        updateMicStatus();    }    /**     * 更新话筒状态     */    private int BASE = 1;    private int SPACE = 100;// 间隔取样时间    private void updateMicStatus() {        if (recorder != null) {            double ratio = (double) recorder.getMaxAmplitude() / BASE;            db = 0;// 分贝            if (ratio > 1)                db = 20 * Math.log10(ratio);            mHandler.postDelayed(mUpdateMicStatusTimer, SPACE);        }    }    private final Handler mHandler = new Handler();    private Runnable mUpdateMicStatusTimer = new Runnable() {        public void run() {            updateMicStatus();        }    };}  

然后activity的简单应用。

package com.bigzone.zuoyou.reception.activity;import android.Manifest;import android.content.ComponentName;import android.content.Intent;import android.content.ServiceConnection;import android.content.pm.PackageManager;import android.os.Handler;import android.os.IBinder;import android.support.v4.app.ActivityCompat;import android.support.v4.content.ContextCompat;import android.util.Log;import android.view.View;import android.widget.AdapterView;import android.widget.CheckBox;import android.widget.Chronometer;import android.widget.CompoundButton;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ListView;import android.widget.TextView;import com.bigzone.zuoyou.R;import com.bigzone.zuoyou.common.BaseActivity;import com.bigzone.zuoyou.reception.adapter.RecordAdapter;import com.bigzone.zuoyou.reception.bean.RecordEntity;import com.bigzone.zuoyou.reception.service.RecordService;import com.bigzone.zuoyou.utils.CommonUtil;import com.bigzone.zuoyou.utils.Logger;import java.io.File;import java.util.ArrayList;import java.util.List;import butterknife.BindView;import butterknife.ButterKnife;import butterknife.OnClick;/** * Created by haohongwei on 2017/8/8. */public class ReceptionMainActivity extends BaseActivity implements CompoundButton.OnCheckedChangeListener, Chronometer.OnChronometerTickListener, AdapterView.OnItemClickListener {    @BindView(R.id.tv_title)    TextView tv_title;    @BindView(R.id.tv_top_right)    TextView tv_histroy;    @BindView(R.id.cm_time)    Chronometer cm_time;    @BindView(R.id.cb_start)    CheckBox cb_start;    @BindView(R.id.iv_voice)    ImageView iv_voice;    @BindView(R.id.listView)    ListView listView;    private List<RecordEntity> list = new ArrayList<>();    private RecordService bindService;    private RecordAdapter recordAdapter;    private boolean isBound = false;    private int miss = 0;    private static int REQ_CODE_PERMISSION = 1001;    private long name;    @BindView(R.id.ll_empty)    LinearLayout ll_empty;    @Override    protected int bindLayout() {        return R.layout.activity_reception_main;    }    @Override    protected void initView() {        ButterKnife.bind(this);        tv_histroy.setText("历史接待");        tv_title.setText("接待");        tv_histroy.setVisibility(View.VISIBLE);        cb_start.setOnCheckedChangeListener(this);        cm_time.setOnChronometerTickListener(this);        cm_time.setText(FormatMiss(0));        if (ContextCompat.checkSelfPermission(ReceptionMainActivity.this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {            ActivityCompat.requestPermissions(ReceptionMainActivity.this, new String[]{Manifest.permission.RECORD_AUDIO}, REQ_CODE_PERMISSION);        }        if (ContextCompat.checkSelfPermission(ReceptionMainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {            ActivityCompat.requestPermissions(ReceptionMainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQ_CODE_PERMISSION);        }        File file = new File(CommonUtil.getSDPath() + "/voice");        if (!file.exists()) {            file.mkdir();        }        recordAdapter = new RecordAdapter(list, this);        listView.setAdapter(recordAdapter);        listView.setEmptyView(ll_empty);        listView.setOnItemClickListener(this);        initData();    }    private void initData() {        list.add(new RecordEntity(0, "录音0", "2017-08-08 10:00-10:20", "新街口店张小姐"));        list.add(new RecordEntity(1, "录音1", "2017-08-08 16:00-16:20", "常府街店张小姐"));        list.add(new RecordEntity(2, "录音2", "2017-08-08 19:00-19:20", "夫子庙店张小姐"));        list.add(new RecordEntity(3, "录音3", "2017-08-08 20:00-20:30", "张府园店张小姐"));        list.add(new RecordEntity(4, "录音4", "2017-08-08 22:10-22:24", "新街口店李小姐"));        recordAdapter.notifyDataSetChanged();    }    private ServiceConnection conn = new ServiceConnection() {        @Override        public void onServiceConnected(ComponentName name, IBinder service) {            isBound = true;            RecordService.MyBinder binder = (RecordService.MyBinder) service;            bindService = binder.getService();            updateMicStatus();        }        //client 和service连接意外丢失时，会调用该方法        @Override        public void onServiceDisconnected(ComponentName name) {            Log.v("hjz", "onServiceDisconnected  A");        }    };    @Override    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {        Intent intent = null;        if (isChecked) {            cb_start.setText("结束接待");            intent = new Intent(ReceptionMainActivity.this, RecordService.class);            name = System.currentTimeMillis();            intent.putExtra("name", name + "");            bindService(intent, conn, BIND_AUTO_CREATE);            cm_time.start();        } else {            cb_start.setText("开始接待");            if (isBound) {                isBound = false;                unbindService(conn);            }            miss = 0;            cm_time.stop();            Logger.d("name", "name : " + name + ".amr");//            File file = new File(CommonUtil.getSDPath() + "/voice/" + name + ".amr");//            修改名字//            File newF = new File(CommonUtil.getSDPath() + "/voice/" + "修改名字" + ".amr");//            file.renameTo(newF);////            删除文件//            file.delete();        }    }    /**     * 更新话筒状态     */    private int SPACE = 100;// 间隔取样时间    private void updateMicStatus() {//        tv_time.setText("分贝:" + bindService.getRandomNumber());        setImageView(bindService.getRandomNumber());        mHandler.postDelayed(mUpdateMicStatusTimer, SPACE);    }    private void setImageView(double randomNumber) {        if (randomNumber > 75) {            iv_voice.setImageResource(R.drawable.voice_10);        } else if (randomNumber > 65) {            iv_voice.setImageResource(R.drawable.voice_8);        } else if (randomNumber > 55) {            iv_voice.setImageResource(R.drawable.voice_6);        } else if (randomNumber > 45) {            iv_voice.setImageResource(R.drawable.voice_4);        } else if (randomNumber > 35) {            iv_voice.setImageResource(R.drawable.voice_2);        } else {            iv_voice.setImageResource(R.drawable.voice_0);        }    }    private final Handler mHandler = new Handler();    private Runnable mUpdateMicStatusTimer = new Runnable() {        public void run() {            updateMicStatus();        }    };    @Override    public void onChronometerTick(Chronometer chronometer) {        miss++;        chronometer.setText(FormatMiss(miss));    }    // 将秒转化成小时分钟秒    public String FormatMiss(int miss) {        String hh = miss / 3600 > 9 ? miss / 3600 + "" : "0" + miss / 3600;        String mm = (miss % 3600) / 60 > 9 ? (miss % 3600) / 60 + "" : "0" + (miss % 3600) / 60;        String ss = (miss % 3600) % 60 > 9 ? (miss % 3600) % 60 + "" : "0" + (miss % 3600) % 60;        return hh + ":" + mm + ":" + ss;    }    @Override    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {        changeActivity(ReceptionDetailActivity.class);    }    @OnClick(R.id.iv_back)    void back() {        finish();    }}

最后上个图吧。