AudioRecordingActivity.java
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 |
import java.io.IOException; import android.app.Activity; import android.content.Context; import android.media.AudioManager; import android.media.AudioManager.OnAudioFocusChangeListener; import android.media.MediaPlayer; import android.media.MediaRecorder; import android.os.Bundle; import android.os.Environment; import android.util.Log; import android.widget.CompoundButton; import android.widget.CompoundButton.OnCheckedChangeListener; import android.widget.ToggleButton; public class AudioRecordingActivity extends Activity { private static final String TAG = "AudioRecordTest"; private static final String mFileName = Environment .getExternalStorageDirectory().getAbsolutePath() + "/audiorecordtest.3gp"; private MediaRecorder mRecorder; private MediaPlayer mPlayer; private AudioManager mAudioManager; @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.main); final ToggleButton mRecordButton = (ToggleButton) findViewById(R.id.record_button); final ToggleButton mPlayButton = (ToggleButton) findViewById(R.id.play_button); mRecordButton.setOnCheckedChangeListener(new OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { mPlayButton.setEnabled(!isChecked); onRecordPressed(isChecked); } }); mPlayButton.setOnCheckedChangeListener(new OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { mRecordButton.setEnabled(!isChecked); onPlayPressed(isChecked); } }); // Request audio focus mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE); mAudioManager.requestAudioFocus(afChangeListener, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN); } private void onRecordPressed(boolean shouldStartRecording) { if (shouldStartRecording) { startRecording(); } else { stopRecording(); } } private void startRecording() { mRecorder = new MediaRecorder(); mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); mRecorder.setOutputFile(mFileName); mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); try { mRecorder.prepare(); } catch (IOException e) { Log.e(TAG, "Couldn't prepare and start MediaRecorder"); } mRecorder.start(); } private void stopRecording() { if (null != mRecorder) { mRecorder.stop(); mRecorder.release(); mRecorder = null; } } private void onPlayPressed(boolean shouldStartPlaying) { if (shouldStartPlaying) { startPlaying(); } else { stopPlaying(); } } private void startPlaying() { mPlayer = new MediaPlayer(); try { mPlayer.setDataSource(mFileName); mPlayer.prepare(); mPlayer.start(); } catch (IOException e) { Log.e(TAG, "Couldn't prepare and start MediaPlayer"); } } private void stopPlaying() { if (null != mPlayer) { if (mPlayer.isPlaying()) mPlayer.stop(); mPlayer.release(); mPlayer = null; } } // Listen for Audio focus changes OnAudioFocusChangeListener afChangeListener = new OnAudioFocusChangeListener() { public void onAudioFocusChange(int focusChange) { if (focusChange == AudioManager.AUDIOFOCUS_LOSS) { mAudioManager.abandonAudioFocus(afChangeListener); if (mPlayer.isPlaying()) stopPlaying(); } } }; @Override public void onPause() { super.onPause(); if (null != mRecorder) { mRecorder.release(); mRecorder = null; } if (null != mPlayer) { mPlayer.release(); mPlayer = null; } } } |
main.xml
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 |
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="horizontal" > <ToggleButton android:id="@+id/record_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="20dip" android:layout_weight="1" android:textOn="Stop Recording" android:textOff="Start Recording"/> <ToggleButton android:id="@+id/play_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="20dip" android:layout_weight="1" android:textOff="Start Playback" android:textOn="Stop Playback"/> </LinearLayout> |