我一直在研究以下代码：
package com.lorenjz.phoneremotefive;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.os.Bundle;
import android.os.IBinder;
import android.speech.RecognizerIntent;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.OnInitListener;
import android.util.Log;
import android.widget.Toast;
public class BlueInterface extends Service implements TextToSpeech.OnInitListener{
static VoiceStuff carpart;
Context context;
private TextToSpeech tts;
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onCreate(){
super.onCreate();
Log.d("interface","interface onStart called");
carpart = new VoiceStuff(context);
tts = new TextToSpeech(this, this);
PackageManager pm = getPackageManager();
List <ResolveInfo> activities = pm.queryIntentActivities(new Intent (RecognizerIntent.ACTION_RECOGNIZE_SPEECH),0);
if (activities.size()!=0){
Log.d("interface","Speach stuff ready to go");
}
else{
Log.d("interface","Speach stuff not present");
}
}
public static void startListening(Context context){
Log.d("interface","Start Listening called");
carpart.startVoiceRecognitionActivity(context);
}
private class VoiceStuff extends Activity implements TextToSpeech.OnInitListener{
List<ResolveInfo> systemActivities=null;
private VoiceStuff(Context context){
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d("interface","onCreate in voice stuff class called");
}
private static final int VOICE_RECOGNITION_REQUEST_CODE = 1234;
public void startVoiceRecognitionActivity(Context context){
//super.startVoiceRecognitionActivity(context);
Log.d("Main","method called");
Intent myCrap = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
myCrap.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
myCrap.putExtra(RecognizerIntent.EXTRA_PROMPT,"Speak your command now");
startActivityForResult(myCrap,VOICE_RECOGNITION_REQUEST_CODE);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == VOICE_RECOGNITION_REQUEST_CODE && resultCode == RESULT_OK) {
// Fill the list view with the strings the recognizer thought it could have heard
ArrayList<String> matches = data.getStringArrayListExtra(
RecognizerIntent.EXTRA_RESULTS);
String stupid = matches.get(0);
//Toast.makeText(MainRemote.this,"" + stupid, Toast.LENGTH_SHORT).show();
if (stupid.equals("home")) {
//getSpeech(1);
}
if (stupid.equals("map")) {
//getSpeech(2);
}
//mList.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,matches));
super.onActivityResult(requestCode, resultCode, data);
}
}
//super.onActivityResult(requestCode, resultCode, context);
public void myStuff(int requestCode, int resultCode, Intent data) {
if (requestCode == VOICE_RECOGNITION_REQUEST_CODE && resultCode == RESULT_OK) {
// Fill the list view with the strings the recognizer thought it could have heard
ArrayList<String> matches = data.getStringArrayListExtra(
RecognizerIntent.EXTRA_RESULTS);
String stupid = matches.get(0);
//Toast.makeText(MainRemote.this,"" + stupid, Toast.LENGTH_SHORT).show();
//mList.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,matches));
}
} //closes VoiceStuff
public void speakOut(String speakPlz) {
Log.d("interface","speak has been called");
//String text = txtText.getText().toString();
tts.speak(speakPlz, TextToSpeech.QUEUE_FLUSH, null);
}
public void onInit(int status) {
// TODO Auto-generated method stub
}
}
public void onInit(int status) {
// TODO Auto-generated method stub
}
}
当我尝试调试代码时，调试器告诉我，当该行startActivityForResult(i,VOICE_RECOGNITION_REQUEST_CODE);正在执行时i，VOICE_RECOGNITION_REQUEST_CODE无法解析为变量。我正在使用一个内部类来弄乱这两个变量的事实吗？
在这里编辑是 LogCat：
08-19 10:18:53.221: D/interface(18165): my crap: Intent { act=android.speech.action.RECOGNIZE_SPEECH (has extras) }
08-19 10:18:53.221: D/interface(18165): VOICE_RECOGNITION_REQUEST_CODE: 1234
08-19 10:19:43.651: D/AndroidRuntime(18165): Shutting down VM
08-19 10:19:43.651: W/dalvikvm(18165): threadid=1: thread exiting with uncaught exception (group=0x41bc7300)
08-19 10:19:43.674: E/AndroidRuntime(18165): FATAL EXCEPTION: main
08-19 10:19:43.674: E/AndroidRuntime(18165): java.lang.NullPointerException
08-19 10:19:43.674: E/AndroidRuntime(18165): at android.app.Activity.startActivityForResult(Activity.java:3351)
08-19 10:19:43.674: E/AndroidRuntime(18165): at android.app.Activity.startActivityForResult(Activity.java:3312)
08-19 10:19:43.674: E/AndroidRuntime(18165): at com.lorenjz.phoneremotefive.BlueInterface$VoiceStuff.startVoiceRecognitionActivity(BlueInterface.java:111)
08-19 10:19:43.674: E/AndroidRuntime(18165): at com.lorenjz.phoneremotefive.BlueInterface.startListening(BlueInterface.java:74)
08-19 10:19:43.674: E/AndroidRuntime(18165): at com.lorenjz.phoneremotefive.MainRemote$1.handleMessage(MainRemote.java:306)
08-19 10:19:43.674: E/AndroidRuntime(18165): at android.os.Handler.dispatchMessage(Handler.java:99)
08-19 10:19:43.674: E/AndroidRuntime(18165): at android.os.Looper.loop(Looper.java:137)
08-19 10:19:43.674: E/AndroidRuntime(18165): at android.app.ActivityThread.main(ActivityThread.java:4745)
08-19 10:19:43.674: E/AndroidRuntime(18165): at java.lang.reflect.Method.invokeNative(Native Method)
08-19 10:19:43.674: E/AndroidRuntime(18165): at java.lang.reflect.Method.invoke(Method.java:511)
08-19 10:19:43.674: E/AndroidRuntime(18165): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
08-19 10:19:43.674: E/AndroidRuntime(18165): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
08-19 10:19:43.674: E/AndroidRuntime(18165): at dalvik.system.NativeStart.main(Native Method)