Android MediaRecorder recording and Playback

The previous article talked about the use of intent recording. This article will use the MediaRecorder class for recording to provide more flexibility.

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Source code:

Package com. multimediademo9mediarecorder; import java. io. file; import android. app. activity; import android. media. mediaPlayer; import android. media. mediaPlayer. onCompletionListener; import android. media. mediaRecorder; import android. OS. bundle; import android. OS. environment; import android. view. view; import android. view. view. onClickListener; import android. widget. button; import android. widget. textView; public cl Ass MainActivity extends Activity implements OnClickListener, OnCompletionListener {private TextView statusTextView; private Button button_startRecording, expiration, expiration, button_finish; private MediaRecorder recorder; private MediaPlayer player; private File audioFile; @ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentVie W (R. layout. activity_main); init ();}/*** instantiate component */private void init () {statusTextView = (TextView) findViewById (R. id. statusTextView); // when running the Activity, set the text of statusTextView to "Ready ". StatusTextView. setText ("Ready"); button_startRecording = (Button) findViewById (R. id. button_startRecording); button_playRecording = (Button) findViewById (R. id. button_playRecording); button_stopRecording = (Button) findViewById (R. id. button_stopRecording); button_finish = (Button) findViewById (R. id. button_finish); button_startRecording.setOnClickListener (this); button_playRecording.setOnClickListener (this ); Listener (this); button_finish.setOnClickListener (this); button_playRecording.setEnabled (false); listener (false); player = new MediaPlayer () ;}@ Overridepublic void onClick (View v) {switch (v. getId () {case R. id. button_startRecording: try {/*** when you click the Start recording button, a new MediaRecorder is constructed and the setAudioSource, * setOutputFormat, and setAudioEncoder methods are called. */Recorder = new MediaRecorder (); recorder. setAudioSource (MediaRecorder. audioSource. MIC); recorder. setOutputFormat (MediaRecorder. outputFormat. THREE_GPP); recorder. setAudioEncoder (MediaRecorder. audioEncoder. AMR_NB);/*** then create a new File object on the SD card and call the setOutputFile method on the MediaRecorder object. */File path = new File (Environment. getExternalStorageDirectory (). getAbsoluteFile () + "/files/"); path. mkdir (); audioFile = File. createTempFile ("recording ",". 3gp ", path); recorder. setOutputFile (audioFile. getAbsolutePath ();/*** call the prepare method on MediaRecorder and start recording. */Recorder. prepare (); recorder. start ();/*** last update statusTextView and change the buttons to be enabled or disabled. */StatusTextView. setText ("Recording"); button_playRecording.setEnabled (false); button_stopRecording.setEnabled (true); button_startRecording.setEnabled (false);} catch (Exception e) {e. printStackTrace ();} break; case R. id. button_playRecording:/*** play the recording. The MediaPlayer object player */player is used. start (); statusTextView. setText ("playing"); button_playRecording.setEnabled (false); button_stopRecording.setEnabled (false); Button_startRecording.setEnabled (false); break; case R. id. button_stopRecording:/*** stop recording and release the MediaRecorder object. */Try {recorder. stop (); recorder. release (); player. setOnCompletionListener (this); player. setDataSource (audioFile. getAbsolutePath (); player. prepare (); statusTextView. setText ("Ready to Play !! "); Button_playRecording.setEnabled (true); button_stopRecording.setEnabled (false);} catch (Exception e) {e. printStackTrace ();} break; case R. id. button_finish: finish (); break; default: break; }}@ Overridepublic void onCompletion (MediaPlayer mp) {encrypt (true); button_startRecording.setEnabled (true); terminate (false); statusTextView. setText ("Ready... ");}}

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