Android 如何将活动结果交付给片段

我正在尝试将活动的结果传递到该活动上的片段

有4个片段和5个按钮。4个按钮用于更改片段，剩下的是语音识别按钮。 我想做的是，当语音输入完成时，将结果放在语音识别的片段成本、解释字段上

语音识别完成后，我的代码就崩溃了。我想知道为什么它不起作用，我应该怎么做才能让它起作用

这是活动代码

public class InputActivity extends ActionBarActivity implements OnClickListener {
private final int GOOGLE_STT = 1000;
private ArrayList<String> mResult;                                  //음성인식 결과 저장할 list
String mResultTextView01;
String mResultTextView02;

final String TAG = "InputActivity";
int mCurrentFragmentIndex;
public final static int FRAGMENT_ONE = 0;
public final static int FRAGMENT_TWO = 1;
public final static int FRAGMENT_THREE = 2;
public final static int FRAGMENT_FOUR = 3;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_input);

    Button bt_oneFragment = (Button) findViewById(R.id.bt_oneFragment);
    Button bt_twoFragment = (Button) findViewById(R.id.bt_twoFragment);
    Button bt_threeFragment = (Button) findViewById(R.id.bt_threeFragment);
    Button bt_fourFragment = (Button) findViewById(R.id.bt_fourFragment);
    bt_oneFragment.setOnClickListener(this);
    bt_twoFragment.setOnClickListener(this);
    bt_threeFragment.setOnClickListener(this);
    bt_fourFragment.setOnClickListener(this);


    mCurrentFragmentIndex = FRAGMENT_ONE;
    fragmentReplace(mCurrentFragmentIndex);


}

public void fragmentReplace(int reqNewFragmentIndex) {

    Fragment newFragment = null;
    newFragment = getFragment(reqNewFragmentIndex);

    // replace fragment
    final FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();

    transaction.replace(R.id.display_fragment, newFragment);

    // Commit the transaction
    transaction.commit();

}

private Fragment getFragment(int idx) {
    Fragment newFragment = null;

    switch (idx) {
    case FRAGMENT_ONE:
        newFragment = new ExpenseCashFragment();
        break;
    case FRAGMENT_TWO:
        newFragment = new ExpenseAccountFragment();
        break;
    case FRAGMENT_THREE:
        newFragment = new EarningCashFragment();
        break;
    case FRAGMENT_FOUR:
        newFragment = new EarningAccountFragment();
        break;

    default:
        Log.d(TAG, "Unhandle case");
        break;
    }

    return newFragment;
}

@Override
public void onClick(View v) {

    switch (v.getId()) {

    case R.id.bt_oneFragment:
        mCurrentFragmentIndex = FRAGMENT_ONE;
        fragmentReplace(mCurrentFragmentIndex);
        break;
    case R.id.bt_twoFragment:
        mCurrentFragmentIndex = FRAGMENT_TWO;
        fragmentReplace(mCurrentFragmentIndex);
        break;
    case R.id.bt_threeFragment:
        mCurrentFragmentIndex = FRAGMENT_THREE;
        fragmentReplace(mCurrentFragmentIndex);
        break;
    case R.id.bt_fourFragment:
        mCurrentFragmentIndex = FRAGMENT_FOUR;
        fragmentReplace(mCurrentFragmentIndex);
        break;
    default:

    }

}
public void on_bt_voice(View v){

    Intent i = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
    i.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE, getPackageName());   
    i.putExtra(RecognizerIntent.EXTRA_LANGUAGE, "ko-KR");       
    i.putExtra(RecognizerIntent.EXTRA_PROMPT, "말을 하세요.");                       
    InputActivity.this.startActivityForResult(i, GOOGLE_STT);
}


@Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data){
     if( resultCode == RESULT_OK && requestCode == GOOGLE_STT)
        {
         showResult(requestCode, data);
        }
        else{
            String msg = null;

            switch(resultCode){
                case SpeechRecognizer.ERROR_AUDIO:
                    msg = "오디오 입력 중 오류가 발생했습니다.";
                    break;
                case SpeechRecognizer.ERROR_CLIENT:
                    msg = "단말에서 오류가 발생했습니다.";
                    break;
                case SpeechRecognizer.ERROR_INSUFFICIENT_PERMISSIONS:
                    msg = "권한이 없습니다.";
                    break;
                case SpeechRecognizer.ERROR_NETWORK:
                case SpeechRecognizer.ERROR_NETWORK_TIMEOUT:
                    msg = "네트워크 오류가 발생했습니다.";
                    break;
                case SpeechRecognizer.ERROR_NO_MATCH:
                    msg = "일치하는 항목이 없습니다.";
                    break;
                case SpeechRecognizer.ERROR_RECOGNIZER_BUSY:
                    msg = "음성인식 서비스가 과부하 되었습니다.";
                    break;
                case SpeechRecognizer.ERROR_SERVER:
                    msg = "서버에서 오류가 발생했습니다.";
                    break;
                case SpeechRecognizer.ERROR_SPEECH_TIMEOUT:
                    msg = "입력이 없습니다.";
                    break;
            }

            if(msg != null) 
                Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_SHORT).show();
        }
    }

    private void showResult(int requestCode, Intent data){
        String key = "";
        if(requestCode == GOOGLE_STT)                   //구글음성인식이면
            key = RecognizerIntent.EXTRA_RESULTS;   //키값 설정

        mResult = data.getStringArrayListExtra(key);        //인식된 데이터 list 받아옴.
        String[] result = new String[mResult.size()];           //배열생성.
        mResult.toArray(result);//  list 배열로 변환
        String i = result[0];
        String[] count = i.split(" ");
        mResultTextView01 = count[0];
        mResultTextView02 = count[1];
        if(requestCode == GOOGLE_STT){
            Log.d(TAG, "fjfj");
             ResultTofragment(mResultTextView01, mResultTextView02);
        }
    }

    ///음성인식 결과값 전달 인텐트

public void ResultTofragment(String a, String b){
    Log.d(TAG, "fj");
    switch(mCurrentFragmentIndex)
    {
    case FRAGMENT_ONE:
         Intent intent1 = new Intent(InputActivity.this, ExpenseCashFragment.class);
            intent1.putExtra("t1", a);
            intent1.putExtra("t2", b);
            InputActivity.this.startActivity(intent1);
         break;
    case FRAGMENT_TWO:
         Intent intent2 = new Intent(InputActivity.this, ExpenseAccountFragment.class);
            intent2.putExtra("t1", a);
            intent2.putExtra("t2", b);
            InputActivity.this.startActivity(intent2);
         break;
    case FRAGMENT_THREE:
         Intent intent3 = new Intent(InputActivity.this, EarningCashFragment.class);
            intent3.putExtra("t1", a);
            intent3.putExtra("t2", b);
            InputActivity.this.startActivity(intent3);
         break;
    case FRAGMENT_FOUR:
         Intent intent4 = new Intent(InputActivity.this, EarningAccountFragment.class);
            intent4.putExtra("t1", a);
            intent4.putExtra("t2", b);
            InputActivity.this.startActivity(intent4);
         break;
    } 
    }


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.input, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    super.onOptionsItemSelected(item);
    switch(item.getItemId())
    {
    case R.id.item1:
        HomeItem();
        break;

    default:
    }
    return true;
}

private void HomeItem() 
{
    new AlertDialog.Builder(this)
    .setTitle("Go to Home")
    .setMessage("Want to go to Home?")
    .setNeutralButton("OK", new DialogInterface.OnClickListener() {

        @Override
        public void onClick(DialogInterface dialog, int which) {
            Intent intent = new Intent(InputActivity.this, MainActivity.class);
            InputActivity.this.startActivity(intent);
        }
    }).show();

}
}

---

在ResultTofragment函数中，您正在使用四个片段的类对象，并尝试启动片段，就像它们是活动一样。这就是为什么会出现ClassCastException

我相信您的意图是显示所选片段，并将您在该函数中添加的意图附加项作为参数传递给片段。有很多方法可以实现这一点。一种方法是向fragmentReplace函数添加一个Bundle参数，然后使用setArguments将其传递给片段：

public void ResultTofragment(String a, String b){
    Log.d(TAG, "fj");
    Bundle args = new Bundle();
    args.putCharSequence("t1", a);
    args.putCharSequence("t2", b);
    fragmentReplace(mCurrentFragmentIndex, args);
}

public void fragmentReplace(int reqNewFragmentIndex, Bundle args) {
    Fragment newFragment = null;
    newFragment = getFragment(reqNewFragmentIndex);

    if (args != null) {
        newFragment.setArguments(args);
    }

    // replace fragment
    final FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();

    transaction.replace(R.id.display_fragment, newFragment);

    // Commit the transaction
    transaction.commit();
}

请注意，对于调用fragmentReplace的其他位置，当您还没有参数时，可以传递null。最后，在片段中，您将从Bundle获得参数，而不是活动的intent extras：

public void getVoiceResult(){
    //
    Bundle args = getArguments();
    CharSequence voiceResult01 = args.getCharSequence("t1");
    CharSequence voiceResult02 = args.getCharSequence("t2");
    //
    cost.setText(""+voiceResult01);
    explanation.setText(""+voiceResult02);
    Log.d(getTag(), "ggggs");
    //
}

---

发布您的logcat输出。

public void ResultTofragment(String a, String b){
    Log.d(TAG, "fj");
    Bundle args = new Bundle();
    args.putCharSequence("t1", a);
    args.putCharSequence("t2", b);
    fragmentReplace(mCurrentFragmentIndex, args);
}

public void fragmentReplace(int reqNewFragmentIndex, Bundle args) {
    Fragment newFragment = null;
    newFragment = getFragment(reqNewFragmentIndex);

    if (args != null) {
        newFragment.setArguments(args);
    }

    // replace fragment
    final FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();

    transaction.replace(R.id.display_fragment, newFragment);

    // Commit the transaction
    transaction.commit();
}

public void getVoiceResult(){
    //
    Bundle args = getArguments();
    CharSequence voiceResult01 = args.getCharSequence("t1");
    CharSequence voiceResult02 = args.getCharSequence("t2");
    //
    cost.setText(""+voiceResult01);
    explanation.setText(""+voiceResult02);
    Log.d(getTag(), "ggggs");
    //
}