在我的一个应用程序中,我有一个活动,语音合成字母数字参考字符串,字母/数字,字母/数字,例如“ABC123”听起来像“Ay,bee,sea,one two three”。由于这是一组有限的声音,我认为通过使用playEarcon方法播放数字和字母的预先录制的.wav文件,使TTS引擎在没有互联网连接的情况下工作会很好。
我已将所有36个wav文件放在res / raw文件夹中,并在初始化TTS引擎时将资源ID映射到字母。这很好用,但是.apk现在要大得多,因为wav文件在apk中未压缩存储。我想让apk的尺寸更小。
在the answer to another question中,它声明wav文件被排除在压缩之外。 (我不明白为什么,因为它们通常拉低到原来的约40%)一个检查apk的内部,这似乎是真的。
由于代码中没有引用资源文件的扩展名,我尝试将wavs重命名为.waw,.abc,.spc。所有这些都被压缩但不幸的是,playEarcon方法在调用时不产生声音,除非扩展名为.wav。
简而言之,我想强制TTS引擎在没有wav扩展名的情况下播放文件,或者说服它来压缩.wav文件。
我们将非常感谢所有建议。值得我发布下面最小的可证明代码示例。我的工作文件名为gb_a.wav,gb_b.wav等。如果扩展名已更改,则会停止发声。
public class WavSpeakerActivity extends Activity implements
RadioGroup.OnCheckedChangeListener, TextToSpeech.OnInitListener {
static final int mGBLetterResIds[] = { R.raw.gb_a, R.raw.gb_b, R.raw.gb_c,
R.raw.gb_d, R.raw.gb_e, R.raw.gb_f, R.raw.gb_g, R.raw.gb_h,
R.raw.gb_i, R.raw.gb_j, R.raw.gb_k, R.raw.gb_l, R.raw.gb_m,
R.raw.gb_n, R.raw.gb_o, R.raw.gb_p, R.raw.gb_q, R.raw.gb_r,
R.raw.gb_s, R.raw.gb_t, R.raw.gb_u, R.raw.gb_v, R.raw.gb_w,
R.raw.gb_x, R.raw.gb_y, R.raw.gb_z };
static final int mGBNumberResIds[] = { R.raw.gb_zero, R.raw.gb_one,
R.raw.gb_two, R.raw.gb_three, R.raw.gb_four, R.raw.gb_five,
R.raw.gb_six, R.raw.gb_seven, R.raw.gb_eight, R.raw.gb_nine };
static final String mGbStr = "GB";
static final String mAlphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
static final String mNumbers = "0123456789";
private String mPpackageName = null;
private String mTextToSpeak = null;
private RadioGroup mRadioGroup = null;// two buttons one sets letters, the other numbers
private TextToSpeech mTts = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mTts = new TextToSpeech(this, this);
mRadioGroup = (RadioGroup) findViewById(R.id.radioGroup1);
mRadioGroup.setOnCheckedChangeListener(this);
}
@Override
protected void onResume() {
super.onResume();
RadioGroup rg = (RadioGroup) findViewById(R.id.radioGroup1);
switchText(rg);
mPpackageName = getPackageName();
}
@Override
public void onDestroy() {
// Don't forget to shutdown speech engine
if (mTts != null) {
mTts.stop();
mTts.shutdown();
}
super.onDestroy();
}
private void switchText(RadioGroup rg) {
// select letters or digits as the String to speak
int checkedButton = rg.getCheckedRadioButtonId();
switch (checkedButton) {
case R.id.alphabet:
mTextToSpeak = mAlphabet;
break;
case R.id.numbers:
mTextToSpeak = mNumbers;
break;
}
}
public void myClickHandler(View target) {
// Just the one button has been clicked - the 'Speak' one
String earconKey;
String lang = Locale.UK.getCountry(); // will be "GB", just have UK in this small example
mTts.setLanguage(Locale.UK); // skip error checking for brevity's sake
String text = mTextToSpeak.replaceAll("\\s", "");// remove spaces (if any)
char c;
for (int i = 0; i < text.length(); i++) {
c = text.charAt(i);
if ( Character.isLetter(c) || Character.isDigit(c) ) {
earconKey = lang + Character.toString(c); // GBA, GBB..GBZ, GB0.. GB9
mTts.playEarcon(earconKey, TextToSpeech.QUEUE_ADD, null);
}
}
}
@Override
public void onInit(int status) {
// doesn't seem we need to check status or setLanguage if we're just playing earcons
mapEarCons(); // map letter/digit sounds to resource ids
}
private void mapEarCons() {
String key;
for (char c = 'A'; c <= 'Z' ; c++){
key = mGbStr + Character.toString(c); // GBA, GBB .. GBZ
mTts.addEarcon(key, mPpackageName, mGBLetterResIds[c - 'A'] );// add it
}
for (int i = 0 ; i <= 9; i++){
key = mGbStr + Integer.toString(i); // GB0, GB1 .. GB9
mTts.addEarcon(key, mPpackageName, mGBNumberResIds[i] );
}
}
@Override
public void onCheckedChanged(RadioGroup rg, int arg1) { switchText(rg); }
}
。
答案 0 :(得分:1)
wFormatTags
的可能值(存储数据的类型),例如here)。addEarcon(String earcon, String filename)
代替addEarcon(String earcon, String packagename, int resourceId)
。-0 wav
cmd行开关的aapt来制作带有从压缩类型中排除的wav文件的apk。答案 1 :(得分:0)
您应该尝试将wav
文件转换为ogg
文件,然后您将获得最佳的声音文件压缩率。