两个onClickListeners。 无法启动程序

Question

我要编程两个按钮。 一个应该识别我的声音，另一个应该使用文本到语音功能。 当我讲话时，文本转到text2，而tts表示接受该文本。 当我分别编写代码时（一个项目中的语音识别，另一个项目中的TT），它可以工作。 但是我想加入这两个功能，但是当我启动程序时，它立即崩溃了。

private Button btnSpeak;
private Button btnHear;
private EditText txtText;
private TextToSpeech tts;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    tts = new TextToSpeech(this, this);
    // Button for VoiceRecognition
    btnHear = (Button)findViewById(R.id.button1);
    // OnClickListener for btnHear
    btnHear.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
                Intent i = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
                i.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, "de-DE");
                try {
                    startActivityForResult(i, REQUEST_OK);
                } catch (Exception e) {
                   //Toast.makeText(...);
                }
            }

    });

    tts = new TextToSpeech(this, this);
    // Button for TTS
    btnSpeak = (Button) findViewById(R.id.button2);
    txtText = (EditText) findViewById(R.id.text2);

    // button on click event
    btnSpeak.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            speakOut();
        }

    });
}

日志：

10-03 20:54:58.188: E/AndroidRuntime(9280): FATAL EXCEPTION: main
10-03 20:54:58.188: E/AndroidRuntime(9280): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.logos_daswortgottes/com.example.logos_daswortgottes.MainActivity}: java.lang.ClassCastException: android.widget.ImageButton cannot be cast to android.widget.Button
10-03 20:54:58.188: E/AndroidRuntime(9280):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184)
10-03 20:54:58.188: E/AndroidRuntime(9280):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2211)
10-03 20:54:58.188: E/AndroidRuntime(9280):     at android.app.ActivityThread.access$600(ActivityThread.java:149)
10-03 20:54:58.188: E/AndroidRuntime(9280):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1300)
10-03 20:54:58.188: E/AndroidRuntime(9280):     at android.os.Handler.dispatchMessage(Handler.java:99)
10-03 20:54:58.188: E/AndroidRuntime(9280):     at android.os.Looper.loop(Looper.java:153)
10-03 20:54:58.188: E/AndroidRuntime(9280):     at android.app.ActivityThread.main(ActivityThread.java:4987)
10-03 20:54:58.188: E/AndroidRuntime(9280):     at java.lang.reflect.Method.invokeNative(Native Method)
10-03 20:54:58.188: E/AndroidRuntime(9280):     at java.lang.reflect.Method.invoke(Method.java:511)
10-03 20:54:58.188: E/AndroidRuntime(9280):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:821)
10-03 20:54:58.188: E/AndroidRuntime(9280):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:584)
10-03 20:54:58.188: E/AndroidRuntime(9280):     at dalvik.system.NativeStart.main(Native Method)
10-03 20:54:58.188: E/AndroidRuntime(9280): Caused by: java.lang.ClassCastException: android.widget.ImageButton cannot be cast to android.widget.Button
10-03 20:54:58.188: E/AndroidRuntime(9280):     at com.example.logos_daswortgottes.MainActivity.onCreate(MainActivity.java:40)
10-03 20:54:58.188: E/AndroidRuntime(9280):     at android.app.Activity.performCreate(Activity.java:5020)
10-03 20:54:58.188: E/AndroidRuntime(9280):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
10-03 20:54:58.188: E/AndroidRuntime(9280):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
10-03 20:54:58.188: E/AndroidRuntime(9280):     ... 11 more

Answer 1

您的buttonSpeak和buttonHear在您的活动中被声明为按钮，但是从您的logcat看来，您似乎正在使用它们来指向ImageButton对象（至少一个或可能两个）。

由于您似乎打算使用图像按钮，因此将活动中的buttonHear和buttonSpeak的引用更改为ImageButton（但这只是一个建议）。