我正在开发这个 android 应用程序，在该应用程序中，我获得语音记录以填充列表视图，其中可能与已识别的单词匹配。
现在我想访问列表视图的第一个元素，但我想在列表视图填充后立即获取此值，而不是在我选择项目（或用户的任何其他活动）时获取此值。我想自动化这个。基本上我希望系统一旦识别出已经识别出来的单词。
我知道我需要创建一个数组列表来存储已识别单词的值，然后将其传递给列表视图的适配器。
像这样 -
matches = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
//set the retrieved list to display in the ListView using an ArrayAdapter
wordList.setAdapter(new ArrayAdapter<String> (this, R.layout.words, matches));
现在，当我尝试通过以下方式访问此“匹配”数组列表时 -
String test = matches.toString();
但是，此时我遇到了一些错误，应用程序崩溃了。我无法让应用程序说出这个test字符串或从中创建一个 toast 消息。
请帮助解决此问题。
PS - 识别器是否有可能没有足够的时间来识别单词并填充列表视图，我尝试在识别完成之前从中发出祝酒消息？我似乎无法弄清楚这一点，因为一旦识别开始，应用程序就会崩溃......无论如何要注入延迟，以便识别器完成它的工作并且我能够成功地创建一个 toast 消息。
任何帮助将不胜感激。
添加代码 -
// 识别部分的代码，其中调用 ListenToSpeech 开始识别过程并填充 wordList。
private void listenToSpeech() {
//start the speech recognition intent passing required data
Intent listenIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
//indicate package
listenIntent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE, getClass().getPackage().getName());
//message to display while listening
listenIntent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Say a word!");
//set speech model
listenIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
//specify number of results to retrieve
listenIntent.putExtra(RecognizerIntent.EXTRA_MAX_RESULTS, 10);
Toast.makeText(MainActivity.this, "SpeakDestination", Toast.LENGTH_SHORT).show();
//start listening
startActivityForResult(listenIntent, VR_REQUEST);
}
/**
* onActivityResults handles:
* - retrieving results of speech recognition listening
* - retrieving result of TTS data check
*/
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
//check speech recognition result
if (requestCode == VR_REQUEST && resultCode == RESULT_OK)
{
//store the returned word list as an ArrayList
matches = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
//set the retrieved list to display in the ListView using an ArrayAdapter
wordList.setAdapter(new ArrayAdapter<String> (this, R.layout.words, matches));
}
//returned from TTS data check
if (requestCode == MY_DATA_CHECK_CODE)
{
//we have the data - create a TTS instance
if (resultCode == TextToSpeech.Engine.CHECK_VOICE_DATA_PASS)
repeatTTS = new TextToSpeech(this, this);
//data not installed, prompt the user to install it
else
{
//intent will take user to TTS download page in Google Play
Intent installTTSIntent = new Intent();
installTTSIntent.setAction(TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
startActivity(installTTSIntent);
}
}
//call superclass method
super.onActivityResult(requestCode, resultCode, data);
}
// 我要实现的过程的代码 -
private void dialogueControl(){
if(initialDialogueCount<=1 && flagVar[0]==false){
initialDialogue();
if(initialDialogueCount>0){
boolean speakingEnd = repeatTTS.isSpeaking();
do{
speakingEnd = repeatTTS.isSpeaking();
} while (speakingEnd);
Toast.makeText(MainActivity.this, "Destination", Toast.LENGTH_SHORT).show();
listenToSpeech();
}
Toast.makeText(MainActivity.this, "Something wrong here Destination", Toast.LENGTH_SHORT).show();
initialDialogueCount++;
if(initialDialogueCount>=2)
flagVar[0]=true;
}
if(flagVar[0]==true){
// test is the string that I want to get from the wordList. The commented part here is what I want to do after I get that string. I want to speak that word out and ask for another input via the recognition. The toast messages above are just to some debugging.
String test = "";
//String ttsText = "You want to fly to "+test+" . Is that correct? Please say Yes or Noo?";
Toast.makeText(MainActivity.this, test, Toast.LENGTH_SHORT).show();
// if (ttsText!=null) {
// if (!repeatTTS.isSpeaking()) {
// repeatTTS.speak(ttsText, TextToSpeech.QUEUE_FLUSH, null);
// }
// }
//
// do{
// speakingEnd = repeatTTS.isSpeaking();
// } while (speakingEnd);
//
// flagVar[1]=true;
//
// Toast.makeText(MainActivity.this, "Destination", Toast.LENGTH_SHORT).show();
//
// listenToSpeech();
}
}
这是我的 activity_main.xml 中的 listView
<ListView android:id="@+id/wordList"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="1"
android:paddingLeft="10dp"
android:paddingTop="3dp"
android:paddingRight="10dp"
android:paddingBottom="3dp"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="5dp"
android:layout_marginBottom="5dp"
/>
这是我的 words.xml
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:padding="5dp"
android:textSize="16sp" >
</TextView>
我希望这有帮助。我真的被困住了。