Android startActivityForResult 请求代码与启动谷歌语音到文本时给出的不同

Question

在我的应用程序中，我正在尝试使用 fragment 中的 RecognizerIntent 启动谷歌语音转文本。请求代码的值是 1010，但在 startActivityForResult 上返回的请求代码是 197618。

请求变量已设置为:

// static result code, random integer
public static final int REQUEST_CODE_VOICE = 1010;

// set intent for recognize speech
Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);

Fragment 的 onActivityCreated 方法，其中 Intent 已启动:

public void onActivityCreated(@Nullable Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);

    // put language
    //intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, "en-US");
    intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
    //intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, "en-US");
    intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, Locale.getDefault());
    intent.putExtra(RecognizerIntent.EXTRA_PROMPT,
            getString(R.string.speech_prompt));

    // tap button on click listener
    btnTap.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            try {
                // start activity
                Log.d("onActivityResult", "voice activity started");
                startActivityForResult(intent, REQUEST_CODE_VOICE);
                Log.d("onActivityResult", "voice activity finished");
            } catch(ActivityNotFoundException e) {
                // the device does not support android speech
                showToast("Your Device Does Not Support Speech Recognition!");
            }
        }
    });
}

这是 MainActivity 的 onActivityResult 方法

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    Log.d("onActivityResult", "request: "+requestCode+", result: "+resultCode);

    switch(requestCode) {
        // Speech to Text
        case VoiceControllerFragment.REQUEST_CODE_VOICE:
            // get the results
            ArrayList<String> text
                    = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
            // show results
            TextView tvRecognizedText = (TextView) findViewById(R.id.tv_recognized_text);
            // tmp string
            //String tmpStr = "";
            tvRecognizedText.setText( "Success: " );

            Log.d("onActivityResult voice", "result: "+RESULT_OK);

            if(resultCode == RESULT_OK && data != null) {
                // concatenate all results
                for(String str : text) {
                    tvRecognizedText.setText( tvRecognizedText.getText().toString() + str );
                }
                Log.d("speech", text.get(0));
            } else {
                tvRecognizedText.setText( "Sorry! Unrecognizable speech.\nTry again!!" );
            }
            break;
    }
}

这是我得到的日志:

04-10 23:11:13.005  29915-29915/? D/onActivityResult﹕ voice activity started
04-10 23:11:13.065  29915-29915/? D/onActivityResult﹕ voice activity finished
04-10 23:11:24.855  29915-29915/? D/onActivityResult﹕ request: 197618, result: -1

测试于:三星盖乐世 S2，糖 bean

引用: http://viralpatel.net/blogs/android-speech-to-text-api/ http://www.androidhive.info/2014/07/android-speech-to-text-tutorial/

Answer 1

对于那些和我一样弄清楚这个问题的人 - 如果你从 Fragment 调用 startActivityForResult(intent, REQUEST_CODE_VOICE); - 添加 getActivity()像这样:

getActivity().startActivityForResult(intent, REQUEST_CODE_VOICE);

如果没有它，您的 onActivityResult() 方法将被各种请求代码触发，除了一个需要的代码(您在 startActivityForResult() 中使用的代码)。

希望对大家有帮助