音频技术

 1 //播放资源文件下和scdard下的音频
 2 public class Main extends Activity implements OnClickListener,
 3         OnCompletionListener {
 4     private MediaPlayer mediaPlayer;
 5     private Button btnPause;
 6 
 7     @Override
 8     public void onCreate(Bundle savedInstanceState) {
 9         super.onCreate(savedInstanceState);
10         setContentView(R.layout.main);
11         // 播放资源文件的音频
12         Button btnStart1 = (Button) findViewById(R.id.btnStart1);
13         // 播放sdcard里边的音频文件
14         Button btnStart2 = (Button) findViewById(R.id.btnStart2);
15 
16         Button btnStop = (Button) findViewById(R.id.btnStop);
17 
18         btnPause = (Button) findViewById(R.id.btnPause);
19 
20         btnStart1.setOnClickListener(this);
21         btnStart2.setOnClickListener(this);
22         btnStop.setOnClickListener(this);
23         btnPause.setOnClickListener(this);
24 
25     }
26 
27     // 播放完成
28     public void onCompletion(MediaPlayer mp) {
29         mp.release();
30         setTitle("资源已经释放");
31 
32     }
33 
34     public void onClick(View view) {
35         try {
36             switch (view.getId()) {
37             case R.id.btnStart1: // 播放音频资源
38                 mediaPlayer = MediaPlayer.create(this, R.raw.music);
39                 mediaPlayer.setOnCompletionListener(this);
40 
41                 mediaPlayer.start();
42 
43                 break;
44             case R.id.btnStart2:// 播放SD卡上的音频文件（/sdcard/music.mp3)
45                 mediaPlayer = new MediaPlayer();
46                 mediaPlayer.setDataSource("/sdcard/music.mp3");
47 
48                 mediaPlayer.prepare();
49                 mediaPlayer.start();
50                 break;
51 
52             case R.id.btnStop:
53                 if (mediaPlayer != null) {
54                     if (mediaPlayer.isPlaying())
55                         mediaPlayer.stop();
56                 }
57                 break;
58 
59             case R.id.btnPause:
60                 if (mediaPlayer != null) {
61                     if ("播放".equals(btnPause.getText().toString())) {
62                         mediaPlayer.start();
63                         btnPause.setText("暂停");
64 
65                     } else if ("暂停".equals(btnPause.getText().toString())) {
66                         mediaPlayer.pause();
67                         btnPause.setText("播放");
68                     }
69                 }
70                 break;
71             default:
72                 break;
73             }
74         } catch (Exception e) {
75             // TODO: handle exception
76         }
77     }
78 }

 

 1 //录制音频
 2 public class Main extends Activity implements OnClickListener {
 3     private File recordAudioFile;
 4     private MediaRecorder mediaRecorder;
 5     private MediaPlayer mediaPlayer;
 6 
 7     @Override
 8     public void onCreate(Bundle savedInstanceState) {
 9         super.onCreate(savedInstanceState);
10         setContentView(R.layout.main);
11         // 录制，停止，播放，删除
12         Button btnRecord = (Button) findViewById(R.id.btnRecord);
13         Button btnStop = (Button) findViewById(R.id.btnStop);
14         Button btnPlay = (Button) findViewById(R.id.btnPlay);
15         Button btnDelete = (Button) findViewById(R.id.btnDelete);
16 
17         btnRecord.setOnClickListener(this);
18         btnStop.setOnClickListener(this);
19         btnPlay.setOnClickListener(this);
20         btnDelete.setOnClickListener(this);
21 
22     }
23 
24     public void onClick(View view) {
25         try {
26             switch (view.getId()) {
27             case R.id.btnRecord: // 录制音频
28                 recordAudioFile = File.createTempFile("record", ".amr");
29                 mediaRecorder = new MediaRecorder();
30                 // 指定音频采集源--麦克风
31                 mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
32                 // 指定录制格式 mpeg4
33                 mediaRecorder
34                         .setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
35                 // 设置编码
36                 mediaRecorder
37                         .setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
38                 // 录制生成文件
39                 mediaRecorder.setOutputFile(recordAudioFile.getAbsolutePath());
40                 mediaRecorder.prepare();
41                 mediaRecorder.start();
42                 Toast.makeText(this, "开始录音", Toast.LENGTH_LONG).show();
43 
44                 break;
45             // 停止
46             case R.id.btnStop:
47                 if (mediaRecorder != null) {
48                     mediaRecorder.stop();
49                     mediaRecorder.release();
50                     mediaRecorder = null;
51                     Toast.makeText(this, "停止录音", Toast.LENGTH_LONG).show();
52                 }
53                 break;
54             // 播放
55             case R.id.btnPlay:
56                 mediaPlayer = new MediaPlayer();
57                 mediaPlayer.setDataSource(recordAudioFile.getAbsolutePath());
58                 mediaPlayer.prepare();
59                 mediaPlayer.start();
60                 break;
61             // 删除
62             case R.id.btnDelete:
63                 recordAudioFile.delete();
64                 break;
65             default:
66                 break;
67             }
68 
69         } catch (Exception e) {
70             // TODO: handle exception
71         }
72     }
73 }

 

转载于:https://www.cnblogs.com/my334420/p/6921508.html