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目前我正在使用pocketsphinx進行語音識別&可視化工具來顯示我的麥克風口音波形 但是，我一次只能運行一件事。因爲麥克風將被可視化器使用，並且在語音識別中沒有任何反應。請查看我的代碼&幫我跑兩者simulaniously同時使用語音識別和可視化工具
主要活動
public class MainActivity extends AppCompatActivity implements RecognitionListener {
//for visualizer permission android 6
private boolean permissionToWriteAccepted = false;
private String [] permissions = {"android.permission.RECORD_AUDIO", "android.permission.WRITE_EXTERNAL_STORAGE"};
//Name searches allow to quickly reconfigure the decoder
private static final String SENTENCE_SEARCH = "sentence";
//used to handle permission request
private static final int PERMISSIONS_REQUEST_RECORD_AUDIO = 1;
private SpeechRecognizer recognizer;
// private Snackbar snackbar;
//for visualizer
public static final String DIRECTORY_NAME_TEMP = "AudioTemp";
public static final int REPEAT_INTERVAL = 40;
// private TextView txtRecord;
VisualizerView visualizerView;
private MediaRecorder recorder = null;
File audioDirTemp;
private boolean isRecording = false;
private Handler handler; // Handler for updating the visualizer
// private boolean recording; // are we currently recording?
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
visualizerView = (VisualizerView) findViewById(R.id.visualizer);
// Add the following code to your onCreate
int requestCode = 200;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
requestPermissions(permissions, requestCode);
}
// Check if user has given permission to record audio
int permissionCheck = ContextCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.RECORD_AUDIO);
if (permissionCheck == PackageManager.PERMISSION_DENIED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.RECORD_AUDIO}, PERMISSIONS_REQUEST_RECORD_AUDIO);
return;
}
//directory for the audio recorder
audioDirTemp = new File(Environment.getExternalStorageDirectory(),
DIRECTORY_NAME_TEMP);
if (audioDirTemp.exists()) {
deleteFilesInDir(audioDirTemp);
} else {
audioDirTemp.mkdirs();
}
// create the Handler for visualizer update
handler = new Handler();
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
runRecognizerSetup();
if (!isRecording) {
// isRecording = true;
// txtRecord.setText("Stop Recording");
recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile(audioDirTemp + "/audio_file"
+ ".mp3");
MediaRecorder.OnErrorListener errorListener = null;
recorder.setOnErrorListener(errorListener);
MediaRecorder.OnInfoListener infoListener = null;
recorder.setOnInfoListener(infoListener);
try {
recorder.prepare();
recorder.start();
isRecording = true; // we are currently recording
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
handler.post(updateVisualizer);
} else {
// txtRecord.setText("Start Recording");
releaseRecorder();
}
Snackbar.make(view, "Pleas speak clearly to the microphone", Snackbar.LENGTH_INDEFINITE)
.setAction("DISMISS", new View.OnClickListener() {
@Override
public void onClick(View v) {
}
}).show();
// runRecognizerSetup();
}
});
//first textbox
((TextView) findViewById(R.id.caption_text)).setText("Speak in Nepali");
//run the recognizer
// runRecognizerSetup();
}
//for visualizer
private void releaseRecorder() {
if (recorder != null) {
isRecording = false; // stop recording
handler.removeCallbacks(updateVisualizer);
visualizerView.clear();
recorder.stop();
recorder.reset();
recorder.release();
recorder = null;
}
}
//for VIsualizer
public static boolean deleteFilesInDir(File path) {
if (path.exists()) {
File[] files = path.listFiles();
if (files == null) {
return true;
}
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory()) {
} else {
files[i].delete();
}
}
}
return true;
}
@Override
public void onRequestPermissionsResult(int requestCode,
String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode){
case 200:
// permissionToRecordAccepted = grantResults[0] == PackageManager.PERMISSION_GRANTED;
permissionToWriteAccepted = grantResults[1] == PackageManager.PERMISSION_GRANTED;
break;
}
if (requestCode == PERMISSIONS_REQUEST_RECORD_AUDIO) {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
runRecognizerSetup();
} else {
finish();
}
}
}
private void runRecognizerSetup() {
//execute it as a async task as it is time consuming
new AsyncTask<Void, Void, Exception>() {
@Override
protected Exception doInBackground(Void... params) {
try {
Assets assets = new Assets(MainActivity.this);
File assetsDir = assets.syncAssets();
setupRecognizer(assetsDir);
} catch (IOException e) {
return e;
}
return null;
}
@Override
protected void onPostExecute(Exception e) {
if (e != null) {
((TextView) findViewById(R.id.caption_text))
.setText("Failed " + e);
} else {
switchSearch(SENTENCE_SEARCH);
}
}
}.execute();
}
private void switchSearch(String searchName) {
recognizer.stop();
searchName = SENTENCE_SEARCH;
recognizer.startListening(searchName, 2000);
}
private void setupRecognizer(File assetsDir) throws IOException {
//SET UP THE FILE to be recognized
recognizer = SpeechRecognizerSetup.defaultSetup()
.setAcousticModel(new File(assetsDir, "loadshedding.ci_cont"))
.setDictionary(new File(assetsDir, "loadshedding.dict"))
.getRecognizer();
recognizer.addListener(this);
//for grammar
//
// File sentenceGrammar = new File(assetsDir,"loadshedding.gram");
// recognizer.addGrammarSearch(SENTENCE_SEARCH,sentenceGrammar);
//for continuous model
File languageModel = new File(assetsDir, "loadshedding.lm.DMP");
recognizer.addNgramSearch(SENTENCE_SEARCH, languageModel);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onBeginningOfSpeech() {
}
@Override
public void onEndOfSpeech() {
if (!recognizer.getSearchName().equals(SENTENCE_SEARCH))
switchSearch(SENTENCE_SEARCH);
Toast.makeText(this, "onEndofSpeech", Toast.LENGTH_SHORT).show();
}
@Override
public void onPartialResult(Hypothesis hypothesis) {
if (hypothesis == null)
return;
String text = hypothesis.getHypstr();
((TextView) findViewById(R.id.result_text)).setText(text);
Toast.makeText(this, "onPartialResult", Toast.LENGTH_SHORT).show();
}
@Override
public void onResult(Hypothesis hypothesis) {
//
// if (hypothesis ==null)
// return;
//
// String text = hypothesis.getHypstr();
// ((TextView)findViewById(R.id.result_text)).setText(text);
// ((TextView) findViewById(R.id.result_text)).setText("");
// Toast.makeText(this,"onResult",Toast.LENGTH_SHORT).show();
}
@Override
public void onError(Exception e) {
((TextView) findViewById(R.id.caption_text)).setText(e.getMessage());
}
@Override
public void onTimeout() {
switchSearch(SENTENCE_SEARCH);
}
@Override
protected void onDestroy() {
super.onDestroy();
if (recognizer != null) {
recognizer.cancel();
recognizer.shutdown();
}
releaseRecorder();
}
// updates the visualizer every 50 milliseconds
Runnable updateVisualizer = new Runnable() {
@Override
public void run() {
if (isRecording) // if we are already recording
{
// get the current amplitude
int x = recorder.getMaxAmplitude();
visualizerView.addAmplitude(x); // update the VisualizeView
visualizerView.invalidate(); // refresh the VisualizerView
// update in 40 milliseconds
handler.postDelayed(this, REPEAT_INTERVAL);
}
}
};
}
這是可視化視圖
public class VisualizerView extends View {
private static final int LINE_WIDTH = 1; // width of visualizer lines
private static final int LINE_SCALE = 75; // scales visualizer lines
private List<Float> amplitudes; // amplitudes for line lengths
private int width; // width of this View
private int height; // height of this View
private Paint linePaint; // specifies line drawing characteristics
// constructor
public VisualizerView(Context context, AttributeSet attrs) {
super(context, attrs); // call superclass constructor
linePaint = new Paint(); // create Paint for lines
linePaint.setColor(Color.GREEN); // set color to green
linePaint.setStrokeWidth(LINE_WIDTH); // set stroke width
}
// called when the dimensions of the View change
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
width = w; // new width of this View
height = h; // new height of this View
amplitudes = new ArrayList<Float>(width/LINE_WIDTH);
}
// clear all amplitudes to prepare for a new visualization
public void clear() {
amplitudes.clear();
}
// add the given amplitude to the amplitudes ArrayList
public void addAmplitude(float amplitude) {
amplitudes.add(amplitude); // add newest to the amplitudes ArrayList
// if the power lines completely fill the VisualizerView
if (amplitudes.size() * LINE_WIDTH >= width) {
amplitudes.remove(0); // remove oldest power value
}
}
// draw the visualizer with scaled lines representing the amplitudes
@Override
public void onDraw(Canvas canvas) {
int middle = height/2; // get the middle of the View
float curX = 0; // start curX at zero
// for each item in the amplitudes ArrayList
for (float power : amplitudes) {
float scaledHeight = power/LINE_SCALE; // scale the power
curX += LINE_WIDTH; // increase X by LINE_WIDTH
// draw a line representing this item in the amplitudes ArrayList
canvas.drawLine(curX, middle + scaledHeight/2, curX, middle
- scaledHeight/2, linePaint);
}
}
}
這是佈局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/content_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:showIn="@layout/activity_main"
tools:context="pannam.loadsheddingfinal.MainActivity">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:padding="16dp" >
<TextView
android:id="@+id/caption_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:textAppearance="?android:attr/textAppearanceLarge"
android:typeface="sans" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center" >
<TextView
android:id="@+id/result_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium" />
</LinearLayout>
<pannam.loadsheddingfinal.VisualizerView
android:id="@+id/visualizer"
android:layout_width="220dp"
android:layout_height="75dp"
android:layout_centerHorizontal="true"
android:layout_margin="5dp"
/>
</LinearLayout>
</RelativeLayout>