Я пытаюсь сделать что-то, что преобразует текст, который я пишу в EditText, в речь, когда я нажимаю button01. Он отлично работает на виртуальной машине с Android API 23, но вылетает и создает исключение NullPointerException, а на виртуальной машине с Android API 30 происходит сбой. Вот код:
public MainActivity() {
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
editText = (EditText) findViewById(R.id.editText);
button01 = (Button) findViewById(R.id.button01);
final TextView textView1 = (TextView) findViewById(R.id.text1) ;
textView1.setText("\n");
tts = new TextToSpeech(this, new TextToSpeech.OnInitListener() {
@Override
public void onInit(int status) {
if(status != ERROR) {
// 언어를 선택한다.
tts.setLanguage(Locale.ENGLISH);
} else {
textView1.setText("TTS 작업에 오류가 생기거나 지원되지 않는 언어입니다.");
tts.speak("TTS 작업에 오류가 생기거나 지원되지 않는 언어입니다.", TextToSpeech.STOPPED, null);
}
}
});
button01.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// editText에 있는 문장을 읽는다.
tts.speak(editText.getText().toString(), TextToSpeech.QUEUE_FLUSH, null);
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
// TTS 객체가 남아있다면 실행을 중지하고 메모리에서 제거한다.
if(tts != null){
tts.stop();
tts.shutdown();
tts = null;
}
}
} Когда я просмотрите Logcat, он показывает это:
2020-07-09 02:10:56.036 7700-7700/com.example.myapplication2 E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.myapplication2, PID: 7700
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myapplication2/com.example.myapplication2.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.speech.tts.TextToSpeech.speak(java.lang.String, int, java.util.HashMap)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3449)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.speech.tts.TextToSpeech.speak(java.lang.String, int, java.util.HashMap)' on a null object reference
at com.example.myapplication2.MainActivity$1.onInit(MainActivity.java:42)
at android.speech.tts.TextToSpeech.dispatchOnInit(TextToSpeech.java:836)
at android.speech.tts.TextToSpeech.initTts(TextToSpeech.java:814)
at android.speech.tts.TextToSpeech.<init>(TextToSpeech.java:745)
at android.speech.tts.TextToSpeech.<init>(TextToSpeech.java:724)
at android.speech.tts.TextToSpeech.<init>(TextToSpeech.java:708)
at com.example.myapplication2.MainActivity.onCreate(MainActivity.java:34)
at android.app.Activity.performCreate(Activity.java:7995)
at android.app.Activity.performCreate(Activity.java:7979)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1309)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3422)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)