[Android]实现点击持续录音，松开结束录音，并实现随着分贝的大小改变图片

显示录音大小的DIALOG实现

public class VioceDomio {
    private Context mContext;
    private AlertDialog dialog ;
    private AlertDialog.Builder adialogbuile;
    private ImageView vioce_show;

    public VioceDomio(Context mContext) {
        this.mContext=mContext;
    }

    public void showRecordingDialog() {
        adialogbuile = new AlertDialog.Builder(mContext, R.style.Theme_AudioDialog);
        LayoutInflater inflater = LayoutInflater.from(mContext);
        View view=inflater.inflate(R.layout.voice_chage,null);
        vioce_show=(ImageView) view.findViewById(R.id.vioce_show);

        adialogbuile.setView(view);
        dialog = adialogbuile.create();

        dialog.show();
        dialog. getWindow().setLayout(500, 450);

    }

    public void HideRecordingDialog() {
        if(dialog!=null && dialog.isShowing()) {
            dialog.dismiss();
            dialog=null;
        }
    }

    public void ChangeRecordingDialog(double db) {    //根据录音的分贝改变大小
        if(db>=1 && db<=18) {
            vioce_show.setImageResource(R.drawable.voicesearch_feedback001);

        }else if(db>=19 && db<=37) {
            vioce_show.setImageResource(R.drawable.voicesearch_feedback002);
        }else if(db>=19 && db<=37) {
            vioce_show.setImageResource(R.drawable.voicesearch_feedback003);
        }
        else if(db>=38 && db<=56) {
            vioce_show.setImageResource(R.drawable.voicesearch_feedback004);
        }else if(db>=57 && db<=75) {
            vioce_show.setImageResource(R.drawable.voicesearch_feedback005);
        }else if(db>=76 && db<=94) {
            vioce_show.setImageResource(R.drawable.voicesearch_feedback006);
        }else if(db>=95 && db<=100) {
            vioce_show.setImageResource(R.drawable.voicesearch_feedback007);
        }
    }
}

Dialog加载的XML页面实现

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="90dp"
    android:layout_marginTop="5dp"  

    android:id="@+id/bianhua">

    <ImageView
        android:id="@+id/vioce_show"
        android:layout_width="wrap_content"
        android:layout_height="50dp"
        android:layout_alignParentBottom="true"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:src="@drawable/voicesearch_feedback001" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:text="正在录音中"
        android:gravity="center"
        />

</RelativeLayout>  

主界面的试下

1. activoti.xml

   <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:orientation="vertical" >
   <Button
           android:id="@+id/speak"
           android:layout_width="wrap_content"
           android:layout_height="42dp"
           android:layout_marginLeft="5dp"
           android:layout_marginRight="5dp"
           android:paddingLeft="10dp"
           android:layout_weight="0.62"
           android:background="@drawable/search_ba"
           android:drawableLeft="@drawable/speak_1"
            android:gravity="center"
           android:text="按住请讲话！！！"
           android:textSize="15sp"
           android:singleLine="true"
           android:visibility="gone"
             />
   </LinearLayout >

2. MainActiovity.java实现

   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       requestWindowFeature(Window.FEATURE_NO_TITLE);
       setContentView(R.layout.activoti);
       send=(Button) findViewById(R.id.send);
   
       viocedomio=new VioceDomio(this);
       speak.setOnTouchListener(new View.OnTouchListener() {
           public boolean onTouch(View v, MotionEvent event) {
               // TODO Auto-generated method stub
               CountingThreadextends thend=new CountingThreadextends();
               if(event.getAction()==MotionEvent.ACTION_DOWN) {   //如果按钮处于按下状态
                   //录音
                   if(!Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)) {
                       Toast.makeText(ChatActivity.this, "SD not ", Toast.LENGTH_SHORT).show();
                       return false;
                   }
                   String sound_path=time_path+"sound.amr";
                   try{
                       soundfile=new File(Environment.getExternalStorageDirectory().getCanonicalFile()+"/bishevoice/"+sound_path);
                       Log.d("send_filepath", Environment.getExternalStorageDirectory().getCanonicalFile()+"/bishevoice/"+sound_path);
                       mmedio=new MediaRecorder();
                       mmedio.setAudioSource(MediaRecorder.AudioSource.MIC);
                       mmedio.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
                       mmedio.setOutputFile(soundfile.getAbsolutePath());
                       mmedio.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
                       try{
                           //创建文件，准备录制
                           soundfile.createNewFile();
                           mmedio.prepare();
                       }catch(IllegalStateException  e) {
                           e.printStackTrace();
                       }
   
                       //开始录制
                       thend.start();
                       mmedio.start();
   
                       speak.setText("松开停止录音");
                       viocedomio.showRecordingDialog();   //显示录音的大小
   
                       final   Handler mHandler = new Handler() {
                           @Override
                               public void handleMessage(Message msg) {
                                   viocedomio.ChangeRecordingDialog(Double.parseDouble(msg.obj.toString()));
                               }
                           };
   
                       new Thread(new Runnable() {   //启动线程根据改变录音显示大小
                           @Override
                           public void run() {
                               // TODO Auto-generated method stub
                               while(mmedio!=null) {
   
                                   double ratio = (double)mmedio.getMaxAmplitude() ;
                                   double db = 0;// 分贝
                                   if (ratio > 1)
                                       db = 20 * Math.log10(ratio);
                                  // Log.d(TAG,分贝值：+db);
                                  // mHandler.postDelayed(mUpdateMicStatusTimer, SPACE);
                                   Message msg=new Message();
                                   msg.obj=db;
                                   mHandler.sendMessage(msg);
   
                               }
                           }
                       }).start();
   
                   }catch(Exception e) {
                       e.printStackTrace();
                   }
               }
   
               if(event.getAction()==MotionEvent.ACTION_UP) {   //如果是松开
                   if(soundfile != null && soundfile.exists()) {  //停止录音
                       try {
                           mmedio.setOnErrorListener(null);
                           mmedio.setOnInfoListener(null);
                           mmedio.setPreviewDisplay(null);
                           mmedio.stop();
                           thend.interrupt();
   
                           //timetask.cancel();
                       }catch(Exception e) {
                            Log.i("Exception", Log.getStackTraceString(e));
                       }
   
                       mmedio.release();
                       mmedio=null;
                       speak.setText("按住请讲话！！！");
                       String content="";
   
                       if(content.isEmpty()) {
                           viocedomio.HideRecordingDialog();  //隐藏录音标志
                           Msg msg=new Msg(content,Msg.TYPE_SENT,Msg.TYPE_SENT_VOICE,Integer.toString(time_int),file_path);
                           msg.setChattype(0);
                           msglist.add(msg);
                           adapter.notifyDataSetChanged(); //当有新消息时，刷新listview中的显示
   
                           msgListView.setSelection(msglist.size()-1); //将listview定位到最后一行
                           }
                       }
   
                   }
               return true;
           }
       });

原文地址：http://blog.51cto.com/lnsane784/2132006