Question

所以我试图实现两次调用相同的活动，我知道会有更好的方法来做到这一点但是现在我只想要2个单独的数据记录。当我尝试运行此代码时，首先读取舒张压BP，这是无意的。有人可以解释为什么会发生这种情况。谢谢。

Intent i = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
                //The following is required when ^^^ this is used
                i.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
                i.putExtra(RecognizerIntent.EXTRA_PROMPT, "Please Read your Systolic Blood Pressure Value");
                startActivityForResult(i, SYSTOLIC_CHECK);
                //A different request code is required per activity called
                Intent j = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
                j.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
                j.putExtra(RecognizerIntent.EXTRA_PROMPT, "Please Read your Diastolic Blood Pressure Value");
                startActivityForResult(j, DIASTOLIC_CHECK);

...

    @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == TAKE_PICTURE_REQUEST && resultCode == RESULT_OK) {
        String thumbnailPath = data.getStringExtra(Intents.EXTRA_THUMBNAIL_FILE_PATH);
        String picturePath = data.getStringExtra(Intents.EXTRA_PICTURE_FILE_PATH);

        processPictureWhenReady(picturePath);
        // TODO: Show the thumbnail to the user while the full picture is being
        // processed.
    }
    else if ((requestCode == SYSTOLIC_CHECK) && resultCode == RESULT_OK)   {
        results = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
        String spokenText = results.get(0);
        System.out.println("Systolic BP: " + spokenText);
        //OutputStreamWriter out = new OutputStreamWriter(openFileOutput(STORETEXT, 0));
    }
    else if ((requestCode == DIASTOLIC_CHECK) && resultCode == RESULT_OK)   {
        results = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
        String spokenText = results.get(0);
        System.out.println("Diastolic BP: " + spokenText);
        //OutputStreamWriter out = new OutputStreamWriter(openFileOutput(STORETEXT, 0));
    }
    super.onActivityResult(requestCode, resultCode, data);
}

Answer 1

API根本不起作用 - 你不能像你想要的那样排队启动多个活动。

执行此操作的常规方法是使用startActivityForResult启动第一个Activity，并在第一个活动返回时启动第二个活动。

Answer 2

如果我没有弄错，因为你将舒张活动称为最后一次，这就是你的收缩活动。因此，舒张活动将是用户首先与之交互的活动。

我只想指出@GreyBeardedGeek所说的是真的。如果你只是开始收缩活动可能会更好，然后，当你收到结果时，开始你的舒张活动（在OnActivityResult中）。

这可以防止您的活动出现问题，而不是按照您想要的顺序开始。

修改

您的代码看起来像这样

...else if ((requestCode == SYSTOLIC_CHECK) && resultCode == RESULT_OK) { results = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS); String spokenText = results.get(0); System.out.println("Systolic BP: " + spokenText); //OutputStreamWriter out = new OutputStreamWriter(openFileOutput(STORETEXT, 0)); //call second activity Intent j = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH); j.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM); j.putExtra(RecognizerIntent.EXTRA_PROMPT, "Please Read your Diastolic Blood Pressure Value"); startActivityForResult(j, DIASTOLIC_CHECK); } ...

修改

您的活动可能如下所示。

public class VoiceActivity extends ActionBarActivity { private String systole; private String diastole; private Button btnGetVoiceInput; private final int SYSTOLIC_CHECK=1, DIASTOLIC_CHECK=2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); btnGetVoiceInput = (Button) findViewById(R.id.btnVoiceInput); btnGetVoiceInput.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent i = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH); //The following is required when ^^^ this is used i.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM); i.putExtra(RecognizerIntent.EXTRA_PROMPT, "Please Read your Systolic Blood Pressure Value"); startActivityForResult(i, SYSTOLIC_CHECK); } }); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { switch (requestCode){ case SYSTOLIC_CHECK: { if(resultCode == RESULT_OK) { ArrayList<String> results = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS); systole = results.get(0); System.out.println("Systolic BP: " + systole); Intent j = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH); j.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM); j.putExtra(RecognizerIntent.EXTRA_PROMPT, "Please Read your Diastolic Blood Pressure Value"); startActivityForResult(j, DIASTOLIC_CHECK); } break; } case DIASTOLIC_CHECK: { if(resultCode == RESULT_OK) { ArrayList<String> results = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS); diastole = results.get(0); Log.v("VoiceInput", "Diastolic BP: " + diastole); doSomething(); } break; } } } private void doSomething() { //do what you want with both readings here String bloodpressure = systole + " / " + diastole; Log.v("Bloodpressure", bloodpressure); } }

获得2个读数后，你可以用它们做点什么。这仍然需要一些错误处理，但我还没有使用语音输入，所以我不知道它返回/可以返回的值。

如何使用startActivityForResult两次启动相同的活动

2 个答案: