onActivityResult内のEditTextのテキストを更新できません

Androidで音声認識を使おうとしています。以下は私のコードです。

これは、音声認識を開始するためのボタンのコードです。talk.setOnClickListener（new OnClickListener（）{

@Override
    public void onClick(View v)
    {
        Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
        intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
        intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "City Name Please?");
        startActivityForResult(intent, REQUEST_CODE);
    }});

これがonActivityResultメソッドです。

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) {
        ArrayList<String> matches_Text = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
        Log.v("Results", matches_Text.get(0).toString());

//Update EditText cityname here

        String normalized_cityname = matches_Text.get(0).toString().trim();
        normalized_cityname = normalized_cityname.replace(" ","%20");
        try {
            getResponseString("http://api.openweathermap.org/data/2.5/weather?q="+normalized_cityname+"&units=metric", true);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }
}

コードは正常に機能しましたが、現在発生している2つの問題があり、それらが関連している可能性があるのではないかと心配しています。

1. を使用してEditTextインスタンスのテキストを更新しようとすると、アプリがクラッシュします。citynamecityname.setText(matches_Text.get(0).toString())
2. 私がヒットした場合speak、今のボタンを、Googleの音声ダイアログはなく、ショーをアップしますcan't reacg google at the moment。

何ができるか提案してください。

getResponseStringメソッドも追加します。

public void getResponseString(String Url, boolean IsCalledOnVoiceInput) throws IOException, JSONException {
        String temperature="";
        String city;
        String country;
        String weather_main, weather_description;
        MyAsyncTask xxx = new MyAsyncTask();
        try {
            String responseString = xxx.execute(Url).get();

            TextView txtTemp = (TextView)findViewById(R.id.txt_temp);
            TextView txtCity = (TextView)findViewById(R.id.txt_CityName);
            TextView txtWeatherMain = (TextView)findViewById(R.id.textView2);
            TextView txtWeatherDescription = (TextView)findViewById(R.id.textView3);

            JSONObject reader = new JSONObject(responseString);
            JSONObject main  = reader.getJSONObject("main");

            temperature = main.getString("temp");
            Log.v("temperarure",temperature);

            city = reader.getString("name");
            Log.v("city",city);

            JSONObject sys  = reader.getJSONObject("sys");
            country = sys.getString("country");
            Log.v("country",country);

            JSONArray weather = reader.getJSONArray("weather");
            JSONObject weather_obj = weather.getJSONObject(0);
            weather_main = weather_obj.getString("main");
            weather_description = weather_obj.getString("description");

            txtTemp.setText(temperature+" °C");
            txtCity.setText(city+" ("+country+")");
            txtWeatherMain.setText(weather_main);
            txtWeatherDescription.setText(weather_description);

            if(IsCalledOnVoiceInput)
                Speak_Weather_Data(city,temperature,weather_main,weather_description);



        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        } catch (JSONException e){
            e.printStackTrace();
        }
    }

これがログ出力です

    12-24 13:36:06.050  12164-12164/samarth.learning.http D/dalvikvm﹕ Late-enabling CheckJNI
12-24 13:36:06.300  12164-12164/samarth.learning.http D/Network﹕ Network
12-24 13:36:06.300  12164-12164/samarth.learning.http V/Lat﹕ 28.8331443
12-24 13:36:06.300  12164-12164/samarth.learning.http V/Long﹕ 78.7717138
12-24 13:36:06.360  12164-12164/samarth.learning.http D/libEGL﹕ loaded /vendor/lib/egl/libEGL_adreno.so
12-24 13:36:06.370  12164-12164/samarth.learning.http D/libEGL﹕ loaded /vendor/lib/egl/libGLESv1_CM_adreno.so
12-24 13:36:06.380  12164-12164/samarth.learning.http D/libEGL﹕ loaded /vendor/lib/egl/libGLESv2_adreno.so
12-24 13:36:06.380  12164-12164/samarth.learning.http I/Adreno-EGL﹕ <qeglDrvAPI_eglInitialize:316>: EGL 1.4 QUALCOMM build:  (CL4169980)
    OpenGL ES Shader Compiler Version: 17.01.10.SPL
    Build Date: 11/04/13 Mon
    Local Branch:
    Remote Branch:
    Local Patches:
    Reconstruct Branch:
12-24 13:36:06.430  12164-12164/samarth.learning.http D/OpenGLRenderer﹕ Enabling debug mode 0
12-24 13:36:06.531  12164-12164/samarth.learning.http E/SpannableStringBuilder﹕ SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
12-24 13:36:06.531  12164-12164/samarth.learning.http E/SpannableStringBuilder﹕ SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
12-24 13:36:08.232  12164-12164/samarth.learning.http W/IInputConnectionWrapper﹕ showStatusIcon on inactive InputConnection
12-24 13:36:18.844  12164-12164/samarth.learning.http V/Results﹕ new delhi
12-24 13:36:18.844  12164-12164/samarth.learning.http D/AndroidRuntime﹕ Shutting down VM
12-24 13:36:18.844  12164-12164/samarth.learning.http W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x4157c8b0)
12-24 13:36:18.854  12164-12164/samarth.learning.http E/AndroidRuntime﹕ FATAL EXCEPTION: main
    java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1234, result=-1, data=Intent { (has extras) }} to activity {samarth.learning.http/samarth.learning.http.MainActivity}: java.lang.NullPointerException
            at android.app.ActivityThread.deliverResults(ActivityThread.java:3462)
            at android.app.ActivityThread.handleSendResult(ActivityThread.java:3505)
            at android.app.ActivityThread.access$1100(ActivityThread.java:150)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1346)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:213)
            at android.app.ActivityThread.main(ActivityThread.java:5225)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:525)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:741)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.NullPointerException
            at samarth.learning.http.MainActivity.onActivityResult(MainActivity.java:160)
            at android.app.Activity.dispatchActivityResult(Activity.java:5322)
            at android.app.ActivityThread.deliverResults(ActivityThread.java:3458)
            at android.app.ActivityThread.handleSendResult(ActivityThread.java:3505)
            at android.app.ActivityThread.access$1100(ActivityThread.java:150)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1346)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:213)
            at android.app.ActivityThread.main(ActivityThread.java:5225)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:525)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:741)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
            at dalvik.system.NativeStart.main(Native Method)
12-24 13:36:22.558  12164-12164/samarth.learning.http I/Process﹕ Sending signal. PID: 12164 SIG: 9