Android advanced-sonic amplitude display, android advanced Amplitude

Android advanced-sonic amplitude display, android advanced Amplitude

Recently, a blogger wants to create an app with a recording function in the middle. As a result, the blogger wants to make the UI look better. When he wants to simulate or QQ voice input, he can display the acoustic amplitude with the sound size. So I searched for some materials and shared the Demo of this function to everyone. I will share my knowledge about more projects in the future.

In fact, this function mainly relies on the getmaxamplder () method of MediaRecorder to obtain the sound amplitude. Then, based on the calculation formula dB, K = 20lg (Vo/Vi) Vo's current amplitude value, the Vi reference value is 600 to get the number of decibels and then display different images on the ImageView according to the sub-bay. In this way, the acoustic amplitude is displayed.

The main functions are listed below. The Demo download link for the recording to display the acoustic amplitude will be provided later:

Public RecordDialog (Context context) {this. context = context; dialog_view = LayoutInflater. from (context ). inflate (R. layout. dialog_sound, null); // initialize the amplitude image progressImg [0] = context. getResources (). getDrawable (R. drawable. mic_1); progressImg [1] = context. getResources (). getDrawable (R. drawable. mic_2); progressImg [2] = context. getResources (). getDrawable (R. drawable. mic_3); progressImg [3] = context. getResources (). getDrawable (R. drawable. mic_4); progressImg [4] = context. getResources (). getDrawable (R. drawable. mic_5); progressImg [5] = context. getResources (). getDrawable (R. drawable. mic_6); progressImg [6] = context. getResources (). getDrawable (R. drawable. mic_7); dialog = new AlertDialog. builder (context ). setView (dialog_view ). show (); // dialog. cancel (); progress = (ImageView) dialog_view.findViewById (R. id. sound_progress); btn_cancel = (ImageView) dialog_view.findViewById (R. id. cancel); btn_submit = (TextView) dialog_view.findViewById (R. id. submit); mic_icon = (ImageView) dialog. findViewById (R. id. mic); dialog_title = (TextView) dialog. findViewById (R. id. title); txt_msg = (TextView) dialog. findViewById (R. id. msg); btn_cancel.setOnClickListener (onCancel); btn_submit.setOnClickListener (onSubmit );}

　　

Then we implement a custom interface SoundAmplitudeListen to display different fluctuating images after obtaining the decibel value:

 

 

private SoundAmplitudeListen onSoundAmplitudeListen=new SoundAmplitudeListen() {@SuppressWarnings("deprecation")@Overridepublic void amplitude(int amplitude, int db, int value) {// TODO Auto-generated method stubif(value>=6){value=6;}progress.setBackgroundDrawable(progressImg[value]);}};

　　

The RecodeManager class for processing decibels during recording:

 

Package com. example. voiceviewdemo; import java. io. file; import java. io. IOException; import java. util. calendar; import java. util. locale; import android. r. integer; import android. media. mediaRecorder; import android. OS. environment; import android. OS. handler; import android. text. format. dateFormat; public class RecodeManager {private File file; // recording File private MediaRecorder mediaRecorder; // android media recording class private Sound AmplitudeListen soundAmplitudeListen; // acoustic amplitude listener private final Handler mHandler = new Handler (); private Runnable mupdatemicstatustable = new Runnable () {/*** dB formula K = 20lg (Vo/Vi) Vo current amplitude value, Vi reference value: 600 */private int BASE = 500; private int RATIO = 5; private int postDelayed = 200; @ Overridepublic void run () {int ratio = mediaRecorder. getMaxAmplitude ()/BASE; int db = (int) (20 * Math. log10 (Math. abs (ratio); int value = db/RATI O; if (value <0) value = 0; if (soundAmplitudeListen! = Null) {response. amplatio (ratio, db, value); mHandler. postDelayed (mUpdateMicStatusTimer, postDelayed) ;}}; public void startRecordCreateFile () throws IOException {if (! Environment. getExternalStorageState (). equals (Environment. MEDIA_MOUNTED) {return;} file = new File (Environment. getExternalStorageDirectory () + File. separator + "1" + File. separator + new DateFormat (). format ("yyyyMMdd_HHmmss", Calendar. getInstance (Locale. CHINA) + ". amr "); mediaRecorder = new MediaRecorder (); // create a recording object mediaRecorder. setAudioSource (MediaRecorder. audioSource. DEFAULT); // starts the recording from the microphone source mediaRecorder. setOutputFo Rmat (MediaRecorder. outputFormat. MPEG_4); // set the output format mediaRecorder. setAudioEncoder (MediaRecorder. audioEncoder. DEFAULT); // sets the encoding format mediaRecorder. setOutputFile (file. getAbsolutePath (); // create a file if (! File. getParentFile (). exists () {file. getParentFile (). mkdirs ();} file. createNewFile (); mediaRecorder. prepare (); mediaRecorder. start (); mHandler. post (mupdatemicstatustder);} public File stopRecord () {if (mediaRecorder! = Null) {mediaRecorder. stop (); mediaRecorder. release (); mediaRecorder = null; mHandler. removeCallbacks (mUpdateMicStatusTimer);} return file;} public void setSoundAmplitudeListen (SoundAmplitudeListen soundAmplitudeListen) {this. soundAmplitudeListen = soundAmplitudeListen;} public interface SoundAmplitudeListen {public void amplen (int amplitude, int db, int value );}}

　　

The effect is as follows:

 

Demo resources: http://download.csdn.net/detail/u014132820/9369346

The following are some small apps developed by the blogger and shared with you:

 

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