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  • android中使用MediaRecoder录制声音

    package com.test.mediarecorder;
    
    import java.io.File;
    
    import android.media.MediaRecorder;
    import android.os.Bundle;
    import android.os.Environment;
    import android.app.Activity;
    import android.view.Menu;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.widget.Button;
    import android.widget.Toast;
    
    public class MainActivity extends Activity implements OnClickListener {
    
        private Button start, stop;
        private MediaRecorder recorder;
        private File soundFile;
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
            start = (Button) findViewById(R.id.start);
            stop = (Button) findViewById(R.id.stop);
            
            start.setOnClickListener(this);
            stop.setOnClickListener(this);
            recorder = new MediaRecorder();
            System.out.println(Environment.getExternalStorageDirectory());
        }
    
        @Override
        public void onClick(View v) {
    
          try {
              
              switch (v.getId()) {
            case R.id.start:
                if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                    Toast.makeText(this, "SD not exists", Toast.LENGTH_LONG).show();
                    return;
                } 
                // create file to save sound
                soundFile = new File(Environment.getExternalStorageDirectory().getCanonicalFile() + "/sound.amr");
                // set the sound source
                recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
                // set the sound output type it must before set sound encoding
                recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
                //set sound encoding
                recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
                recorder.setOutputFile(soundFile.getAbsolutePath());
                recorder.prepare();
                // start record sound
                recorder.start();
                break;
            case R.id.stop:
                if (soundFile != null && soundFile.exists()) {
                    // stop record
                    recorder.stop();
                    recorder.release();
                    recorder = null;
                }
                break;
            }
          }catch (Exception e) {
              e.printStackTrace();
          }
            
        }
    
    }
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  • 原文地址:https://www.cnblogs.com/heml/p/3594319.html
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