android TestToSpeech引擎speak()方法抛出NoSuchMethodError

Question

当我点击按钮时,我编写了一个会在EditText中输入单词的应用程序.但是当我点击按钮时,应用程序因为TTS的speck()方法中的NoSuchMethodError而崩溃.代码在虚拟设备上运行时没有错误Android版本5.1,但破坏虚拟设备与Android版本4.4.2和Xperia Z 4.4.4.帮帮我吧.这是我的活动

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tts = new TextToSpeech(this, new TextToSpeech.OnInitListener() {
            @Override
        public void onInit(int status) {
            if (status == TextToSpeech.SUCCESS) {
                isTTSready = true;
                int result = tts.setLanguage(Locale.US);
                if (result == TextToSpeech.LANG_MISSING_DATA
                        | result == TextToSpeech.LANG_NOT_SUPPORTED) {
                    Toast.makeText(getApplicationContext(), "Language is missing",
                                Toast.LENGTH_LONG).show();
                    }
                }
            }
        });
        text = (EditText) findViewById(R.id.text);
        button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                if (isTTSready) {
                    String readIt = text.getText().toString();
                    tts.speak(readIt, TextToSpeech.QUEUE_FLUSH, null, null);
                }

            }
        });
}

这是错误日志

05-31 12:50:26.970: E/AndroidRuntime(2312): FATAL EXCEPTION: main
05-31 12:50:26.970: E/AndroidRuntime(2312): Process:     com.example.tts_test, PID: 2312
05-31 12:50:26.970: E/AndroidRuntime(2312): java.lang.NoSuchMethodError: android.speech.tts.TextToSpeech.speak
05-31 12:50:26.970: E/AndroidRuntime(2312):     at com.example.tts_test.MainActivity$2.onClick(MainActivity.java:51)
05-31 12:50:26.970: E/AndroidRuntime(2312):     at android.view.View.performClick(View.java:4438)
05-31 12:50:26.970: E/AndroidRuntime(2312):     at android.view.View$PerformClick.run(View.java:18422)
05-31 12:50:26.970: E/AndroidRuntime(2312):     at android.os.Handler.handleCallback(Handler.java:733)
05-31 12:50:26.970: E/AndroidRuntime(2312):     at android.os.Handler.dispatchMessage(Handler.java:95)
05-31 12:50:26.970: E/AndroidRuntime(2312):     at android.os.Looper.loop(Looper.java:136)
05-31 12:50:26.970: E/AndroidRuntime(2312):     at android.app.ActivityThread.main(ActivityThread.java:5017)
05-31 12:50:26.970: E/AndroidRuntime(2312):     at java.lang.reflect.Method.invokeNative(Native Method)
05-31 12:50:26.970: E/AndroidRuntime(2312):     at java.lang.reflect.Method.invoke(Method.java:515)
05-31 12:50:26.970: E/AndroidRuntime(2312):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
05-31 12:50:26.970: E/AndroidRuntime(2312):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
05-31 12:50:26.970: E/AndroidRuntime(2312):     at dalvik.system.NativeStart.main(Native Method)

对不起,我的英语不好.如果这篇文章让你感到不安,我很抱歉,这是我的第一个问题.

Answer 1

您的代码崩溃,因为您使用

public int speak (CharSequence text, int queueMode, Bundle params, String utteranceId) 

正如您在文档中看到的那样,它在API Level 21中添加.

对于低于21的API,您应该使用

public int speak (String text, int queueMode, HashMap<String, String> params)

将您的代码更改为以下内容:

if (isTTSready) {
    String readIt = text.getText().toString();

    if(Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) { 
        tts.speak(readIt, TextToSpeech.QUEUE_FLUSH, null, null);
    } else {
        tts.speak(readIt, TextToSpeech.QUEUE_FLUSH, null);
    }
}