我为学校项目创建了一个应用程序。我使用EditText，Buttons和TextView以及texttospeech创建了一个应用程序。但是当我第一次启动应用程序时，它会自动发布演讲并说“你好”＃34;但是我没有按下输入并说出＃34; Hello＆＃34;（在btnEnter（）中），而且我的If语句也没有用（在btnEnter（）和speakOut（）中）。我想要做的就是演讲不会在发布时自动发布，直到我按回车键并说出＃34; Hello + Name＆＃34;，当我按下回车但是我没有输入我的名字时，它会说＆＃34;您必须输入您的姓名＆＃34;。
这是我的Java代码：
package com.ramirez_finalprogram;
import java.util.Locale;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.OnInitListener;
import android.support.v4.view.GestureDetectorCompat;
import android.util.Log;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity implements OnInitListener {
private GestureDetectorCompat gestureObject;
private TextToSpeech tts;
MediaPlayer mp1, mp2, mp3, mp4, mp5;
EditText et_name;
Button btnEnter;
TextView tvResult;
Button btnA;
Button btnB;
Button btnC;
Button btnD;
Button btnE;
Button btnExit;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tts = new TextToSpeech(this, this);
final RelativeLayout rl = (RelativeLayout)findViewById(R.id.container);
gestureObject = new GestureDetectorCompat(this, new LearnGesture());
mp1 = MediaPlayer.create(getApplicationContext(), R.raw.audi);
mp2 = MediaPlayer.create(getApplicationContext(), R.raw.ford);
mp3 = MediaPlayer.create(getApplicationContext(), R.raw.toyota);
mp4 = MediaPlayer.create(getApplicationContext(), R.raw.bmw);
mp5 = MediaPlayer.create(getApplicationContext(), R.raw.chev);
et_name = (EditText)findViewById(R.id.editText_name);
btnEnter = (Button)findViewById(R.id.button_enter);
tvResult = (TextView)findViewById(R.id.textView3);
btnA = (Button)findViewById(R.id.button_a);
btnB = (Button)findViewById(R.id.button_b);
btnC = (Button)findViewById(R.id.button_c);
btnD = (Button)findViewById(R.id.button_d);
btnE = (Button)findViewById(R.id.button_e);
btnExit = (Button)findViewById(R.id.button_exit);
btnEnter.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
rl.setBackgroundResource(R.drawable.grass);
String name = et_name.getText().toString();
if(name == ""){
speakOut();
Toast.makeText(MainActivity.this, "Must Enter your Name First", Toast.LENGTH_LONG).show();
}else{
tvResult.setText("Hello, "+name);
speakOut();
et_name.setText("");
Toast.makeText(MainActivity.this, "Name Submitted", Toast.LENGTH_LONG).show();
}
}
});
btnA.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
rl.setBackgroundResource(R.drawable.audi);
mp1.start();
}
});
btnB.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
rl.setBackgroundResource(R.drawable.ford);
mp2.start();
}
});
btnC.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
rl.setBackgroundResource(R.drawable.toyota);
mp3.start();
}
});
btnD.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
rl.setBackgroundResource(R.drawable.bmw);
mp4.start();
}
});
btnE.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
rl.setBackgroundResource(R.drawable.chev);
mp5.start();
}
});
btnExit.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setCancelable(true);
builder.setTitle("Confirm Exit");
builder.setMessage("Do you really want to Exit?");
builder.setPositiveButton("YES",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
System.exit(0);
Toast.makeText(getApplicationContext(),
"Closing", Toast.LENGTH_LONG).show();
}
});
builder.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
// User pressed Cancel button. Write Logic Here
Toast.makeText(getApplicationContext(),
"You clicked on Cancel",
Toast.LENGTH_SHORT).show();
}
});
builder.show();
}
});
}
@Override
public void onDestroy() {
// Don't forget to shutdown!
if (tts != null) {
tts.stop();
tts.shutdown();
}
super.onDestroy();
}
@Override
public void onInit(int status) {
// TODO Auto-generated method stub
if (status == TextToSpeech.SUCCESS) {
int result = tts.setLanguage(Locale.US);
// tts.setPitch(5); // set pitch level
tts.setSpeechRate(1); // set speech speed rate
if (result == TextToSpeech.LANG_MISSING_DATA
|| result == TextToSpeech.LANG_NOT_SUPPORTED) {
Log.e("TTS", "Language is not supported");
} else {
btnEnter.setEnabled(true);
speakOut();
}
} else {
Log.e("TTS", "Initilization Failed");
}
}
private void speakOut() {
String text = et_name.getText().toString();
if(text != ""){
tts.speak("Hello"+text, TextToSpeech.QUEUE_FLUSH, null);
}else if(text == ""){
tts.speak("You must Enter your name first", TextToSpeech.QUEUE_FLUSH, null);
}
}
public void showMessage(String title, String message){
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setCancelable(true);
builder.setTitle(title);
builder.setMessage(message);
builder.show();
}
@Override
public boolean onTouchEvent(MotionEvent event){
this.gestureObject.onTouchEvent(event);
return super.onTouchEvent(event);
}
class LearnGesture extends GestureDetector.SimpleOnGestureListener {
public boolean onFling(MotionEvent event1, MotionEvent event2, float velocityX, float velocityY){
//if(event2.getX() > event1.getX()){
//}
//else
//if(event2.getX() < event1.getX()){
//}
if(event2.getY() > event1.getY()){
getActionBar().hide();
Toast.makeText(MainActivity.this, "ActionBar Hide", Toast.LENGTH_SHORT).show();
}else
if(event2.getY() < event1.getY()){
getActionBar().show();
Toast.makeText(MainActivity.this, "ActionBar Show", Toast.LENGTH_SHORT).show();
}
return true;
}
}
}