Android 实现录音和监听声音大小实现话筒动画效果

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公司项目做的差不多了，，闲下来了，，就写一篇关于android利用MediaRecorder实现录音的文章吧，并且录音的时候声音的大小可以控制话筒实现动画效果,
效果如图所示:
这里写图片描述
录音的文件最后保存在SD卡下名为”luyin.3gp”这个文件,
直接看代码咯:
主要就一个MainActivity:

import java.io.File;import android.app.Activity;import android.graphics.Color;import android.graphics.drawable.Drawable;import android.media.MediaRecorder;import android.os.Bundle;import android.os.Environment;import android.os.Handler;import android.view.MotionEvent;import android.view.View;import android.widget.Button;import android.widget.ImageView;import android.widget.RelativeLayout;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends Activity {    //存储很多张话筒图片的数组    private Drawable[] micImages;    //话筒的图片    private ImageView micImage;    private RelativeLayout recordingContainer;    private TextView recordingHint;    private Button buttonPressToSpeak;    private MediaRecorder recorder=null;    //录音存储在SD卡的路径    private String output_Path=Environment.getExternalStorageDirectory().getAbsolutePath()            +File.separator+"luyin.3gp";    //录音文件    private File soundFile;    private int BASE = 600;      private int SPACE = 200;// 间隔取样时间       private final Handler mHandler = new Handler(){         public void handleMessage(android.os.Message msg) {            int what=msg.what;            //根据mHandler发送what的大小决定话筒的图片是哪一张            //说话声音越大,发送过来what值越大            if(what>13){                what=13;            }             micImage.setImageDrawable(micImages[what]);         };     };          private Runnable mUpdateMicStatusTimer = new Runnable() {              public void run() {                  updateMicStatus();              }          };      @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        init();    }    private void init() {        micImage=(ImageView) findViewById(R.id.mic_image);        recordingHint=(TextView) findViewById(R.id.recording_hint);        recordingContainer=(RelativeLayout) findViewById(R.id.recording_container);        buttonPressToSpeak=(Button) findViewById(R.id.buttonPressToSpeak);        buttonPressToSpeak.setOnTouchListener(new PressToSpeakListen());        // 动画资源文件,用于录制语音时        micImages = new Drawable[] {                 getResources().getDrawable(R.drawable.record_animate_01),                getResources().getDrawable(R.drawable.record_animate_02),                getResources().getDrawable(R.drawable.record_animate_03),                getResources().getDrawable(R.drawable.record_animate_04),                getResources().getDrawable(R.drawable.record_animate_05),                getResources().getDrawable(R.drawable.record_animate_06),                getResources().getDrawable(R.drawable.record_animate_07),                getResources().getDrawable(R.drawable.record_animate_08),                getResources().getDrawable(R.drawable.record_animate_09),                getResources().getDrawable(R.drawable.record_animate_10),                getResources().getDrawable(R.drawable.record_animate_11),                getResources().getDrawable(R.drawable.record_animate_12),                getResources().getDrawable(R.drawable.record_animate_13),                getResources().getDrawable(R.drawable.record_animate_14), };    }    /**     * 按住说话listener     *      */    class PressToSpeakListen implements View.OnTouchListener {        @Override        public boolean onTouch(View v, MotionEvent event) {            switch (event.getAction()) {            case MotionEvent.ACTION_DOWN:                if (!isExitsSdcard()) {                     Toast.makeText(MainActivity.this, "未检测到SD卡", Toast.LENGTH_SHORT).show();                    return false;                }                if(recorder!=null){                    recorder.stop();                    recorder.release();                    recorder=null;                }                soundFile=new File(output_Path);                recorder=new MediaRecorder();                recorder.setAudioSource(MediaRecorder.AudioSource.MIC);//声音来源是话筒                recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);//设置格式                recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);//设置解码方式                recorder.setOutputFile(soundFile.getAbsolutePath());                try {                    recorder.prepare();                } catch (Exception e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }                recorder.start();                updateMicStatus();                    recordingContainer.setVisibility(View.VISIBLE);                    recordingHint.setText("手指上滑，取消发送");                    recordingHint.setBackgroundColor(Color.TRANSPARENT);                    return true;            case MotionEvent.ACTION_MOVE: {                //在这里只是做了监听，并没有做与发送相关的处理                if (event.getY() < 0) {                    recordingHint.setText("松开手指，取消发送");                    recordingHint.setBackgroundResource(R.drawable.recording_text_hint_bg);                } else {                    recordingHint.setText("手指上滑，取消发送");                    recordingHint.setBackgroundColor(Color.TRANSPARENT);                }                return true;            }            case MotionEvent.ACTION_UP:                //抬起手指，停止录音                recordingContainer.setVisibility(View.INVISIBLE);                 stopRecoder();                 Toast.makeText(getApplicationContext(), "录音存储到了"+soundFile.getAbsolutePath(), 1).show();                return true;            default:                return false;            }        }    }    private void stopRecoder(){        if (soundFile != null && soundFile.exists())        {            // 停止录音            recorder.stop();              // 释放资源            recorder.release();              recorder = null;        }    }     private void updateMicStatus() {           if(recorder!=null){             int ratio = recorder.getMaxAmplitude() / BASE;               int db = 0;// 分贝                if (ratio > 1)                   db = (int) (20 * Math.log10(ratio));                  System.out.println("分贝值："+db+"     "+Math.log10(ratio));                  //我对着手机说话声音最大的时候，db达到了35左右，                mHandler.postDelayed(mUpdateMicStatusTimer, SPACE);                  //所以除了2，为的就是对应14张图片                mHandler.sendEmptyMessage(db/2);         }     }    /**     * 检测Sdcard是否存在     *      * @return     */    public  boolean isExitsSdcard() {        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))            return true;        else            return false;    }}

然后是activity_main.xml:

<RelativeLayout 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"  >         <RelativeLayout            android:id="@+id/recording_container"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_centerInParent="true"            android:background="@drawable/recording_hint_bg"            android:padding="10dp"            android:visibility="invisible" >            <ImageView                android:id="@+id/mic_image"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_centerHorizontal="true"                android:src="@drawable/record_animate_01" />            <TextView                android:id="@+id/recording_hint"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_below="@id/mic_image"                android:layout_centerHorizontal="true"                android:layout_marginTop="5dp"                android:padding="2dp"                android:text="手指上滑，取消发送"                android:textSize="10sp" />        </RelativeLayout><Button    android:id="@+id/buttonPressToSpeak"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_alignParentBottom="true"    android:layout_marginBottom="30dip"    android:layout_centerHorizontal="true"    android:text="摁下录音" /></RelativeLayout>

最后不要忘了加权限:

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>    <uses-permission android:name="android.permission.RECORD_AUDIO"/>

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