6步学会android多媒体MediaRecorder录音

MediaRecorder即录音要想使用首先查看API，可以看到MediaRecorder的生命周期

API不仅给了生命周期图，还有例子如下

MediaRecorder recorder = new MediaRecorder(); recorder.setAudioSource(MediaRecorder.AudioSource.MIC); recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); recorder.setOutputFile(PATH_NAME); recorder.prepare(); recorder.start(); // Recording is now started … recorder.stop(); recorder.reset(); // You can reuse the object by going back to setAudioSource() step recorder.release(); // Now the object cannot be reused

查看完API我们可以试着写一写了；【1】搭界面：两个按钮，一个播放一个停止【2】加点击事件【3】别忘加权限

=”android.permission.WRITE_EXTERNAL_STORAGE”/>

【4】得到MediaRecorder并设置参数

recorder=new MediaRecorder();//音频来源 recorder.setAudioSource(MediaRecorder.AudioSource.MIC);//设置输出格式 recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);//音频编码recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);//设置保存在sdcard下面名为 myrecord.3gp recorder.setOutputFile(Environment.getExternalStorageDirectory() + “/myrecord.3gp”);

【5】开始录制

recorder.prepare();recorder.start();

【6】停止录制

recorder.stop();recorder.reset();recorder.release();

这样子就已经完全实现

下面是完整源码

.OnClickListener{private Button mButtonStart;private Button mButtonStop;private MediaRecorder recorder;(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);mButtonStart= (Button) findViewById(R.id.button_start);mButtonStop= (Button) findViewById(R.id.button_stop);mButtonStop.setOnClickListener(this);mButtonStart.setOnClickListener(this);}(View v) {switch (v.getId()){case R.id.button_start:recorder=new MediaRecorder();recorder.setAudioSource(MediaRecorder.AudioSource.MIC);recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);recorder.setOutputFile(Environment.getExternalStorageDirectory() + “/myrecord.3gp”);try {recorder.prepare();recorder.start();} catch (IOException e) {e.printStackTrace();}break;case R.id.button_stop:recorder.stop();recorder.reset();recorder.release();break;default:break;}}}

，大海，别为森林的渺小而沮丧，

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