我正在尝试让语音识别适用于我的 Android 2.3.3 应用程序，但缺少一些基本的东西。
首先，在我的文件顶部，我AndroidManifest.xml有：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.myuser.myapp">
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
... remainder omitted for brevity
我认为这应该提示 Android 询问最终用户是否希望在麦克风启动时授予我的应用程序权限（如果没有，请纠正我！）...
接下来，我Activity需要满足我的应用程序语音识别功能的全部需求。基本上，我希望应用程序检测到有人大声说“ Go ”：
public class SpeechActivity extends AppCompatActivity implements RecognitionListener {
private SpeechRecognizer speechRecognizer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_speech);
int check = ContextCompat.checkSelfPermission(this, android.Manifest.permission.RECORD_AUDIO);
if(check != PackageManager.PERMISSION_GRANTED) {
throw new RuntimeException("Ya can't do that now, ya here.");
}
speechRecognizer = SpeechRecognizer.createSpeechRecognizer(this);
speechRecognizer.setRecognitionListener(this);
Intent speechIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
speechIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
speechIntent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE, "voice.recognition.test");
speechIntent.putExtra(RecognizerIntent.EXTRA_MAX_RESULTS, 5);
speechRecognizer.startListening(speechIntent);
Log.i("SpeechActivity", "Speech Recognizer is listening");
}
@Override
public void onReadyForSpeech(Bundle bundle) {
}
@Override
public void onBeginningOfSpeech() {
}
@Override
public void onRmsChanged(float v) {
}
@Override
public void onBufferReceived(byte[] bytes) {
}
@Override
public void onEndOfSpeech() {
}
@Override
public void onError(int i) {
}
@Override
public void onResults(Bundle bundle) {
Log.i("SpeechActivity", "Speech was detected...");
String spoken = "";
ArrayList<String> data = bundle.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION);
for (int i = 0; i < data.size(); i++) {
spoken += data.get(i);
}
Log.i(this.getClass().getName(), String.format("The word \"%s\" was detected.", spoken));
if(spoken.equalsIgnoreCase("go")) {
doSomething();
}
}
@Override
public void onPartialResults(Bundle bundle) {
}
@Override
public void onEvent(int i, Bundle bundle) {
}
}
我通过将手机连接到我的笔记本电脑（通过 USB）在我的三星 Galaxy S7 Edge 上运行该应用程序，单击 Android Studio 中的运行（应用程序）按钮，然后选择我的手机作为连接的设备。
当应用程序在我的手机上启动时，我注意到的第一件事是它没有提示我接受/拒绝应用程序使用麦克风的权限。这对我来说是一个早期的警告信号，表明有些事情出了问题。
但是，当我导航到SpeechActivity/activity_speech.xml屏幕时，我得到：
当它运行时，我得到：
FATAL EXCEPTION: main
Process: com.example.myuser.myapp, PID: 9585
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myuser.myapp/com.example.myuser.myapp.SpeechActivity}: java.lang.RuntimeException: Ya can't do that now, ya here.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2947)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3008)
at android.app.ActivityThread.-wrap14(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1650)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6688)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1468)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1358)
Caused by: java.lang.RuntimeException: Ya can't do that now, ya here.
at com.example.myuser.myapp.SpeechActivity.onCreate(SpeechActivity.java:43)
at android.app.Activity.performCreate(Activity.java:6912)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1126)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2900)
我是否可能需要下载并安装插件或 APK 才能使语音识别工作？为什么我的应用没有请求使用我手机麦克风的权限？语音识别器是如何开始/收听的，但似乎根本没有接收到任何语音？