android-如何在api 21中使用TextToSpeech

但是函数

speak（字符串文本、int-queueMode、HashMap-params）

在API级别21中被弃用。如何解决此问题？

是的，您是正确的，它已被弃用，直到您使用的API 21：

public class MainActivity extends AppCompatActivity implements TextToSpeech.OnInitListener {
    private TextToSpeech tts;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        tts = new TextToSpeech(this,this);

        TelephonyManager tm = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);

        PhoneStateListener callStateListener = new PhoneStateListener() {
            public void onCallStateChanged(int state, String incomingNumber) {

                if(state== TelephonyManager.CALL_STATE_RINGING ){
                    tts.speak(incomingNumber+" calling", TextToSpeech.QUEUE_FLUSH, null);
                    Toast.makeText(getApplicationContext(),"Phone is Ringing : "+incomingNumber,Toast.LENGTH_LONG).show();
                }
            }
        };
    }

    @Override
    public void onInit(int status) {

    }
}

只需将

null

传递给

utteranceId

参数

---

更多关于

为什么有人应该努力发布到stackoverflow以传递null的信息？第三个参数具有重要意义。。正确的？

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

...    
tts.speak(incomingNumber+" calling", TextToSpeech.QUEUE_FLUSH, null, null);