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POAndroid on back key pressed stop recorder
 

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    <p>I have a recorder created in the <code>onCreate()</code>, like final <code>MediaRecorder recorder=new MediaRecorder();</code>, and i need to stop recording when the user press the back button.</p> <p>In order to stop the recorder i used the following code.</p> <pre><code>final MediaRecorder recorder=new MediaRecorder(); @Override protected void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.noise); // elementi TextView picco=(TextView) findViewById(R.id.picco_recorder); ImageView noise_bar=(ImageView) findViewById(R.id.noise_bar); ImageView noise_bar_red=(ImageView) findViewById(R.id.noise_bar_red); ImageView imgnoise = (ImageView) findViewById(R.id.logo_noise); imgnoise.setOnClickListener(new OnClickListener() { public void onClick(View v) { recorder.stop(); recorder.release(); Intent torna_home=new Intent(Noise.this,Index.class); startActivity(torna_home); } }); // noise recorder.setAudioSource(MediaRecorder.AudioSource.MIC); recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); recorder.setOutputFile("/dev/null"); try{ recorder.prepare(); }catch(IllegalStateException e){ Log.d("Errore",e.toString()); e.printStackTrace(); }catch(IOException e){ Log.d("Errore",e.toString()); e.printStackTrace(); } recorder.start(); double db=10*Math.log(recorder.getMaxAmplitude()); picco.setText("" + (int)db); noise_bar.scrollTo(0, (int)((int)db*1.5)); noise_bar_red.scrollTo(0, (int)((int)db*1.5)); Timer timer=new Timer(); timer.scheduleAtFixedRate(new RecorderTask(recorder), 0, 500); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if ((keyCode == KeyEvent.KEYCODE_BACK)) { Intent torna_home=new Intent(Noise.this,Index.class); startActivity(torna_home); } return super.onKeyDown(keyCode, event); } @Override public void onBackPressed() { super.onBackPressed(); recorder.stop(); recorder.release(); } private class RecorderTask extends TimerTask{ TextView risultato=(TextView) findViewById(R.id.picco_recorder); TextView max=(TextView) findViewById(R.id.max_recorder); TextView media=(TextView) findViewById(R.id.media_recorder); ImageView noise_bar=(ImageView) findViewById(R.id.noise_bar); ImageView noise_bar_red=(ImageView) findViewById(R.id.noise_bar_red); private MediaRecorder recorder; public RecorderTask(MediaRecorder recorder){ this.recorder = recorder; } public void run(){ runOnUiThread(new Runnable() { @Override public void run() { double db=10*Math.log(recorder.getMaxAmplitude()); risultato.setText("" + (int)db); if(Integer.parseInt(max.getText().toString())&lt;(int)db){ max.setText("" + (int)db); noise_bar_red.scrollTo(0, (int)((int)db*1.5)); } media.setText(""+((int)db+Integer.parseInt(max.getText().toString()))/2); noise_bar.scrollTo(0, (int)((int)db*1.5)); } }); } } </code></pre> <p>to intercept the back button, but it's outside the onCreate and i can't intercept the recorder!</p>
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