基本上我有兩個java活動，我在一個活動中實作了textToSpeech，但是當我使用點擊視圖轉到另一個活動并且當我按下回傳主活動時，它將再次執行texttospeech方法。但是我只想在用戶啟動應用程式時執行一次此方法，之后它將停止。 下面是我的代碼，我只想執行一次代碼，它將如何完成？
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;
import android.speech.RecognizerIntent;
import android.speech.tts.TextToSpeech;
import android.view.View;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import org.w3c.dom.Text;
import java.util.ArrayList;
import java.util.Locale;
public class MainActivity extends AppCompatActivity {
private static final int REQ_CODE_SPEECH_INPUT = 100;
private TextView mVoiceInputTv;
private ImageButton mSpeakBtn;
private static TextToSpeech textToSpeech;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textToSpeech = new TextToSpeech(this, new TextToSpeech.OnInitListener() {
@Override
public void onInit ( int status){
if (status != TextToSpeech.ERROR) {
textToSpeech.setLanguage(Locale.US);
textToSpeech.speak("Welcome to Blind App. Tap on the screen. Say Read for reading . Say calculator for calculator.say time and date. say weather for weather. say battery for battery.", TextToSpeech.QUEUE_FLUSH,null );
}
}
});
mVoiceInputTv = (TextView)findViewById(R.id.voiceInput);
mSpeakBtn = (ImageButton)findViewById(R.id.btnSpeak);
mSpeakBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startVoiceInput();
}
});
}
private void startVoiceInput() {
Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, Locale.getDefault());
intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Hello, How can I help you?");
try {
startActivityForResult(intent, REQ_CODE_SPEECH_INPUT);
} catch (ActivityNotFoundException a) {
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQ_CODE_SPEECH_INPUT) {
if (resultCode == RESULT_OK && null != data) {
ArrayList<String> result = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
mVoiceInputTv.setText(result.get(0));
}
if (mVoiceInputTv.getText().toString().equals("read")) {
Intent intent = new Intent(getApplicationContext(), MainActivity2.class);
startActivity(intent);
mVoiceInputTv.setText(null);
}
if (mVoiceInputTv.getText().toString().equals("calculator")) {
Intent intent = new Intent(getApplicationContext(), MainActivity3.class);
startActivity(intent);
mVoiceInputTv.setText(null);
}
if (mVoiceInputTv.getText().toString().equals("time and date")) {
Intent intent = new Intent(getApplicationContext(), MainActivity4.class);
startActivity(intent);
mVoiceInputTv.setText(null);
}
if (mVoiceInputTv.getText().toString().equals("weather")) {
Intent intent = new Intent(getApplicationContext(), MainActivity5.class);
startActivity(intent);
mVoiceInputTv.setText(null);
}
if (mVoiceInputTv.getText().toString().equals("battery")) {
Intent intent = new Intent(getApplicationContext(), MainActivity6.class);
startActivity(intent);
mVoiceInputTv.setText(null);
}
}
}
public void onPause() {
if (textToSpeech != null) {
textToSpeech.stop();
}
super.onPause();
}
}
uj5u.com熱心網友回復：
在 Global 和onStop/onPause 方法中的這些代碼中制作 Text to Speak 變數。
public static void releaseTts() {
if (mTts != null) {
mTts.stop();
mTts.shutdown();
}
}
uj5u.com熱心網友回復：
在MainActivity.class 中替換這些代碼
private static final int REQ_CODE_SPEECH_INPUT = 100;
private static int firstTime = 0;
private TextView mVoiceInputTv;
private ImageButton mSpeakBtn;
private static TextToSpeech textToSpeech;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textToSpeech = new TextToSpeech(this, new TextToSpeech.OnInitListener() {
@Override
public void onInit(int status) {
if (status != TextToSpeech.ERROR) {
textToSpeech.setLanguage(Locale.US);
if (firstTime == 0)
textToSpeech.speak("Welcome to Blind App. Tap on the screen. Say Read for reading . Say calculator for calculator.say time and date. say weather for weather. say battery for battery.", TextToSpeech.QUEUE_FLUSH, null);
}
}
});
mVoiceInputTv = (TextView) findViewById(R.id.voiceInput);
mSpeakBtn = (ImageButton) findViewById(R.id.btnSpeak);
mSpeakBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
firstTime = 1;
startVoiceInput();
}
});
}
private void startVoiceInput() {
Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, Locale.getDefault());
intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Hello, How can I help you?");
try {
startActivityForResult(intent, REQ_CODE_SPEECH_INPUT);
} catch (ActivityNotFoundException a) {
a.printStackTrace();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQ_CODE_SPEECH_INPUT) {
if (resultCode == RESULT_OK && null != data) {
ArrayList<String> result = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
mVoiceInputTv.setText(result.get(0));
}
if (mVoiceInputTv.getText().toString().equals("read")) {
Intent intent = new Intent(getApplicationContext(), MainActivity2.class);
startActivity(intent);
mVoiceInputTv.setText(null);
}
if (mVoiceInputTv.getText().toString().equals("calculator")) {
Intent intent = new Intent(getApplicationContext(), MainActivity3.class);
startActivity(intent);
mVoiceInputTv.setText(null);
}
if (mVoiceInputTv.getText().toString().equals("time and date")) {
Intent intent = new Intent(getApplicationContext(), MainActivity4.class);
startActivity(intent);
mVoiceInputTv.setText(null);
}
if (mVoiceInputTv.getText().toString().equals("weather")) {
Intent intent = new Intent(getApplicationContext(), MainActivity5.class);
startActivity(intent);
mVoiceInputTv.setText(null);
}
if (mVoiceInputTv.getText().toString().equals("battery")) {
Intent intent = new Intent(getApplicationContext(), MainActivity6.class);
startActivity(intent);
mVoiceInputTv.setText(null);
}
}
}
public void onPause() {
if (textToSpeech != null) {
textToSpeech.stop();
}
super.onPause();
}
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