当一个拨出呼叫事件触发时，经过一段时间的呼叫发送 DTMF 音，但当发送 DTMF 音时，先前的呼叫将保持并生成新的呼叫，并在 android 中生成 3 路呼叫。
我能做什么调用不生成 3 路代码？
发送DTMF的代码是：
ToneGenerator tone = new ToneGenerator(AudioManager.STREAM_DTMF,ToneGenerator.MAX_VOLUME >> 1);
tone.startTone(ToneGenerator.TONE_DTMF_1);
tone.startTone(ToneGenerator.TONE_DTMF_2);
tone.startTone(ToneGenerator.TONE_DTMF_3);
tone.startTone(ToneGenerator.TONE_DTMF_4);
tone.startTone(ToneGenerator.TONE_DTMF_5);
tone.startTone(ToneGenerator.TONE_DTMF_6);
tone.startTone(ToneGenerator.TONE_DTMF_7);
tone.startTone(ToneGenerator.TONE_DTMF_8);
tone.startTone(ToneGenerator.TONE_DTMF_9);
tone.startTone(ToneGenerator.TONE_DTMF_P);
tone.startTone(ToneGenerator.TONE_DTMF_S);
tone.stopTone();
concatenate_tonevalue = ("tel://");
for (i = 0; i < j; i++) {
value = String.valueOf(param.charAt(i));
try {
parsetonevalue = Integer.parseInt(value);
} catch (Exception e) {
// TODO: handle exception
}
tonea = ToneGenerator.TONE_DTMF_0;
toneb = ToneGenerator.TONE_DTMF_1;
tonec = ToneGenerator.TONE_DTMF_2;
toned = ToneGenerator.TONE_DTMF_3;
tonee = ToneGenerator.TONE_DTMF_4;
tonef = ToneGenerator.TONE_DTMF_5;
toneg = ToneGenerator.TONE_DTMF_6;
toneh = ToneGenerator.TONE_DTMF_7;
tonei = ToneGenerator.TONE_DTMF_8;
tonej = ToneGenerator.TONE_DTMF_9;
tonek = ToneGenerator.TONE_DTMF_P;
tonel = ToneGenerator.TONE_DTMF_S;
/* compare dialed value with tone generator value */
if (parsetonevalue == tonea) {
concatenate_tonevalue += String.valueOf(tonea) + ",";
} else if (parsetonevalue == toneb) {
concatenate_tonevalue += String.valueOf(toneb) + ",";
} else if (parsetonevalue == tonec) {
concatenate_tonevalue += String.valueOf(tonec) + ",";
} else if (parsetonevalue == toned) {
concatenate_tonevalue += String.valueOf(toned) + ",";
} else if (parsetonevalue == tonee) {
concatenate_tonevalue += String.valueOf(tonee) + ",";
} else if (parsetonevalue == tonef) {
concatenate_tonevalue += String.valueOf(tonef) + ",";
} else if (parsetonevalue == toneg) {
concatenate_tonevalue += String.valueOf(toneg) + ",";
} else if (parsetonevalue == toneh) {
concatenate_tonevalue += String.valueOf(toneh) + ",";
} else if (parsetonevalue == tonei) {
concatenate_tonevalue += String.valueOf(tonei) + ",";
} else if (parsetonevalue == tonej) {
concatenate_tonevalue += String.valueOf(tonej) + ",";
} else if (parsetonevalue == tonek) {
concatenate_tonevalue += String.valueOf(tonek) + ",";
} else if (parsetonevalue == tonel) {
concatenate_tonevalue += String.valueOf(tonel) + ",";
}
}
Uri uri = Uri.parse(concatenate_tonevalue + ToneGenerator.TONE_DTMF_P);
MyActivity activity = new MyActivity();
activity.finish();
Intent i = new Intent(Intent.ACTION_CALL, uri);
startActivity(i);
return false;
}