In this lesson, you will learn to use the speech recognition.
For this, you will use the Intent ACTION_RECOGNIZE_SPEECH.
To use the speech recognition system, use the Intent ACTION_RECOGNIZE_SPEECH.
Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH); |
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM); |
intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Talk now !"); |
try { |
startActivityForResult(intent, 123); |
} catch (ActivityNotFoundException e) { |
// Logiciel de reconnaissance vocale non installé |
} |
Once the engine has analyzed the sound, it sends the result by intent :
protected void onActivityResult(int requestCode, int resultCode, Intent data) { |
if(requestCode == 123) && resultCode == Activity.RESULT_OK) { |
// Analyse du résultat |
} |
} |
} |
If the software of speech recognition can’t be find, it can be installed automatically :
Intent intentInstall = new Intent( |
Intent.ACTION_VIEW, |
Uri.parse("market://details?id=com.google.android.voicesearch") |
); |
In the method onActivityResult, the result of the analysis is in the argument data as ArrayList of String :
ArrayList<String> results = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS); |
String text = ""; |
for (String result : results) { |
text += result + "\\n"; |
} |
et_output.setText (text); |
Layout main.xml
<?xml version="1.0" encoding="utf-8"?> |
<LinearLayout |
xmlns:android="http://schemas.android.com/apk/res/android" |
android:orientation="vertical" |
android:layout_width="fill_parent" |
android:layout_height="fill_parent"> |
<EditText |
android:id="@+id/et_output" |
android:layout_width="fill_parent" |
android:layout_height="match_parent" |
android:text="Enter a value" /> |
</LinearLayout> |
File Main.java
public class Main extends Activity { |
|
private static final int REQUEST_CODE = 1; |
EditText et_output; |
public void onCreate(Bundle savedInstanceState) { |
super.onCreate(savedInstanceState); |
et_output = (EditText)findViewById (R.id.et_output); |
Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH); |
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM); |
intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Talk now !"); |
try { |
startActivityForResult(intent, REQUEST_CODE); |
} catch (ActivityNotFoundException e) { |
Toast.makeText(this, "No recognition software installed. Download it.", Toast.LENGTH_SHORT).show(); |
Intent intentInstall = new Intent( |
Intent.ACTION_VIEW, |
Uri.parse("market://details?id=com.google.android.voicesearch") |
); |
} |
} |
protected void onActivityResult(int requestCode, int resultCode, Intent data) { |
if(requestCode == REQUEST_CODE) { |
if (resultCode == Activity.RESULT_OK) { |
ArrayList<String> results = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS); |
String text = ""; |
for (String result : results) { |
text += result + "\\n"; |
} |
et_output.setText (text); |
} else { |
Toast.makeText(this, "Operation failed", Toast.LENGTH_SHORT).show(); |
} |
} |
} |
} |