Qrobot开发总结之Android语音识别
Qrobot开发总结之Android语音识别
Android sdk提供了语音识别的接口,有些人在网上找了例子发现运行不了(PS:网上的例子基本就那一个,都是各种转载的),原因在于手机没有安装google语音搜索软件!去网上下载一个安上就可以了,另外需保持手机网络畅通。
第一种方法:这种方法会显示一个语音对话框,各种提示信息会显示的比较清晰,也是实现起来最简单的。
触发语音识别是调用
- Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
- intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
- intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "您的语音将转化为文字");
- startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE);
VOICE_RECOGNITION_REQUEST_CODE这个是一个静态的全局变量
sdk解释是:requestCode If>= 0, this code will be returned in onActivityResult() when the activity exits.
然后复写onActivityResult()方法:
- @Override
- protected void onActivityResult(int requestCode, int resultCode, Intent data) {
- if(requestCode == VOICE_RECOGNITION_REQUEST_CODE && resultCode == RESULT_OK){
- ArrayList<String> results = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
- Toast.makeText(MainActivity.this, matches.get(0), Toast.LENGTH_LONG).show();
- //to do sth
- }
- super.onActivityResult(requestCode, resultCode, data);
- }
第2中方法:这种方法是不显示对话框,完全在后台运行,给用户的体验会更好一些。
初始化:
- SpeechRecognizer recognizer = SpeechRecognizer.createSpeechRecognizer(this);
- recognizer.setRecognitionListener(new listener());
触发语音识别时调用
- Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
- intent.putExtra("calling_package", "VoiceIME");
- intent.putExtra(RecognizerIntent.EXTRA_MAX_RESULTS, 1);
- recognizer.startListening(intent);
区别于第一种方法,这种方法要实现一个接口RecognitionListener类
- class listener implements RecognitionListener {
- public void onReadyForSpeech(Bundle params) {
- }
- public void onBeginningOfSpeech() {
- }
- public void onRmsChanged(float rmsdB) {
- }
- public void onBufferReceived(byte[] buffer) {
- }
- public void onEndOfSpeech() {
- }
- public void onError(int error) {
- String s = "";
- switch(error){
- case SpeechRecognizer.ERROR_AUDIO:
- s = "录音设别错误";
- break;
- case SpeechRecognizer.ERROR_CLIENT:
- s = "其他客户端错误";
- break;
- case SpeechRecognizer.ERROR_INSUFFICIENT_PERMISSIONS:
- s = "权限不足";
- break;
- case SpeechRecognizer.ERROR_NETWORK:
- s = "网络连接错误";
- break;
- case SpeechRecognizer.ERROR_NETWORK_TIMEOUT:
- s = "网络连接超时";
- break;
- case SpeechRecognizer.ERROR_NO_MATCH:
- s = "没有匹配项";
- break;
- case SpeechRecognizer.ERROR_RECOGNIZER_BUSY:
- s = "识别服务繁忙";
- break;
- case SpeechRecognizer.ERROR_SERVER:
- s = "识别服务器错误";
- break;
- case SpeechRecognizer.ERROR_SPEECH_TIMEOUT:
- s = "无语音输入";
- break;
- }
- s += " 请重试";
- Toast.makeText(MainActivity.this, s, Toast.LENGTH_SHORT).show();
- }
- public void onResults(Bundle results) {
- recognizer_result = results.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION).get(0);
- Toast.makeText(MainActivity.this, recognizer_result, Toast.LENGTH_SHORT).show();
- }
- public void onPartialResults(Bundle partialResults) {
- }
- public void onEvent(int eventType, Bundle params) {
- }
- }
看方法的名字相信大家应该就知道要干什么了,多看文档。起初我觉得用第2中方法给用户的提示信息太少,往往出错了,用户不知道是怎么回事。后面看文档才发现google android sdk已经定义了很多错误的错误号,只要根据不同错误给出恰当的提示就好了!
评论暂时关闭