android通话时第二通电话呼叫等待提示音音量大小

callnotifier.java

public void run() {

......

switch (mToneId) {

case TONE_CALL_WAITING:

toneType = ToneGenerator.TONE_SUP_CALL_WAITING;

toneVolume = TONE_RELATIVE_VOLUME_HIPRI;  //可以更改这个音量，目前是80，代表相对其它声音的大小

// Call waiting tone is stopped by stopTone() method

toneLengthMillis = Integer.MAX_VALUE - TONE_TIMEOUT_BUFFER;

break;