java - 从非 Activity 类启动 TextToSpeech？

Question

我使用文本到语音合成所需的几个方法构建了一个帮助程序类，但是我无法在没有 getApplicationContext() 的情况下启动 TextToSpeech 对象。我该如何启动它？

public class SpeechHelper {
    private TextToSpeech speech;
    private Context context = null;

    public SpeechHelper(Context context)
    {
        this.context = context;
        speech = new TextToSpeech(getApplicationContext(), context);
    }

Answer 1

这是实现接口(interface)的代码:

public class SpeechHelper implements OnInitListener {
    private TextToSpeech speech;
    private Context context = null;

    public SpeechHelper(Context context)
    {
        this.context = context;
        speech = new TextToSpeech(context, this);
    }

    @Override
    public void onInit(int status) {
        // TextToSpeech engine is initialized
    }
}